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 ${EMULATION_NAME}
  12    Copyright 1991, 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
  13    2003, 2004, 2005
  14    Free Software Foundation, Inc.
  15    Written by Steve Chamberlain <sac@cygnus.com>
  16    AIX support by Ian Lance Taylor <ian@cygnus.com>
  17    AIX 64 bit support by Tom Rix <trix@redhat.com>
  18
  19 This file is part of GLD, the Gnu Linker.
  20
  21 This program is free software; you can redistribute it and/or modify
  22 it under the terms of the GNU General Public License as published by
  23 the Free Software Foundation; either version 2 of the License, or
  24 (at your option) any later version.
  25
  26 This program is distributed in the hope that it will be useful,
  27 but WITHOUT ANY WARRANTY; without even the implied warranty of
  28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  29 GNU General Public License for more details.
  30
  31 You should have received a copy of the GNU General Public License
  32 along with this program; if not, write to the Free Software
  33 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  34
  35 #define TARGET_IS_${EMULATION_NAME}
  36
  37 #include "bfd.h"
  38 #include "sysdep.h"
  39 #include "libiberty.h"
  40 #include "safe-ctype.h"
  41 #include "getopt.h"
  42 #include "obstack.h"
  43 #include "bfdlink.h"
  44
  45 #include "ld.h"
  46 #include "ldmain.h"
  47 #include "ldmisc.h"
  48 #include "ldexp.h"
  49 #include "ldlang.h"
  50 #include "ldfile.h"
  51 #include "ldemul.h"
  52 #include "ldctor.h"
  53 #include <ldgram.h>
  54
  55 #include "coff/internal.h"
  56 #include "coff/xcoff.h"
  57 #include "libcoff.h"
  58 #include "libxcoff.h"
  59
  60 static void gld${EMULATION_NAME}_read_file (const char *, bfd_boolean);
  61 static void gld${EMULATION_NAME}_free (void *);
  62 static void gld${EMULATION_NAME}_find_relocs (lang_statement_union_type *);
  63 static void gld${EMULATION_NAME}_find_exp_assignment (etree_type *);
  64
  65
  66 /* The file alignment required for each section.  */
  67 static unsigned long file_align;
  68
  69 /* The maximum size the stack is permitted to grow.  This is stored in
  70    the a.out header.  */
  71 static unsigned long maxstack;
  72
  73 /* The maximum data size.  This is stored in the a.out header.  */
  74 static unsigned long maxdata;
  75
  76 /* Whether to perform garbage collection.  */
  77 static int gc = 1;
  78
  79 /* The module type to use.  */
  80 static unsigned short modtype = ('1' << 8) | 'L';
  81
  82 /* Whether the .text section must be read-only (i.e., no relocs
  83    permitted).  */
  84 static int textro;
  85
  86 /* Whether to implement Unix like linker semantics.  */
  87 static int unix_ld;
  88
  89 /* Structure used to hold import file list.  */
  90
  91 struct filelist
  92 {
  93   struct filelist *next;
  94   const char *name;
  95 };
  96
  97 /* List of import files.  */
  98 static struct filelist *import_files;
  99
 100 /* List of export symbols read from the export files.  */
 101
 102 struct export_symbol_list
 103 {
 104   struct export_symbol_list *next;
 105   const char *name;
 106 };
 107
 108 static struct export_symbol_list *export_symbols;
 109
 110 /* Maintains the 32 or 64 bit mode state of import file */
 111 static unsigned int symbol_mode = 0x04;
 112
 113 /* Which symbol modes are valid */
 114 static unsigned int symbol_mode_mask = 0x0d;
 115
 116 /* Whether this is a 64 bit link */
 117 static int is_64bit = 0;
 118
 119 /* Which syscalls from import file are valid */
 120 static unsigned int syscall_mask = 0x77;
 121
 122 /* fake file for -binitfini support */
 123 static lang_input_statement_type *initfini_file;
 124
 125 /* Whether to do run time linking
 126    -brtl enables, -bnortl and -bnortllib disable. */
 127 static int rtld;
 128
 129 /* Explicit command line library path, -blibpath */
 130 static char *command_line_blibpath = NULL;
 131
 132 /* This routine is called before anything else is done.  */
 133
 134 static void
 135 gld${EMULATION_NAME}_before_parse (void)
 136 {
 137   ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
 138
 139   config.has_shared = TRUE;
 140
 141   /* The link_info.[init|fini]_functions are initialized in ld/lexsup.c.
 142      Override them here so we can use the link_info.init_function as a
 143      state flag that lets the backend know that -binitfini has been done.  */
 144
 145   link_info.init_function = NULL;
 146   link_info.fini_function = NULL;
 147 }
 148
 149 /* Handle AIX specific options.  */
 150
 151 enum
 152   {
 153     OPTION_IGNORE = 300,
 154     OPTION_AUTOIMP,
 155     OPTION_ERNOTOK,
 156     OPTION_EROK,
 157     OPTION_EXPORT,
 158     OPTION_IMPORT,
 159     OPTION_INITFINI,
 160     OPTION_LOADMAP,
 161     OPTION_MAXDATA,
 162     OPTION_MAXSTACK,
 163     OPTION_MODTYPE,
 164     OPTION_NOAUTOIMP,
 165     OPTION_NOSTRCMPCT,
 166     OPTION_PD,
 167     OPTION_PT,
 168     OPTION_STRCMPCT,
 169     OPTION_UNIX,
 170     OPTION_32,
 171     OPTION_64,
 172     OPTION_LIBPATH,
 173     OPTION_NOLIBPATH,
 174   };
 175
 176 static void
 177 gld${EMULATION_NAME}_add_options
 178   (int ns, char **shortopts, int nl, struct option **longopts,
 179    int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
 180 {
 181   static const char xtra_short[] = "D:H:KT:z";
 182   static const struct option xtra_long[] = {
 183   /* -binitfini has special handling in the linker backend.  The native linker
 184      uses the arguemnts to generate a table of init and fini functions for
 185      the executable.  The important use for this option is to support aix 4.2+
 186      c++ constructors and destructors.  This is tied into gcc via collect2.c.
 187
 188      The function table is accessed by the runtime linker/loader by checking if
 189      the first symbol in the loader symbol table is __rtinit.  The gnu linker
 190      generates this symbol and makes it the first loader symbol.  */
 191
 192     {"basis", no_argument, NULL, OPTION_IGNORE},
 193     {"bautoimp", no_argument, NULL, OPTION_AUTOIMP},
 194     {"bcomprld", no_argument, NULL, OPTION_IGNORE},
 195     {"bcrld", no_argument, NULL, OPTION_IGNORE},
 196     {"bcror31", no_argument, NULL, OPTION_IGNORE},
 197     {"bD", required_argument, NULL, OPTION_MAXDATA},
 198     {"bE", required_argument, NULL, OPTION_EXPORT},
 199     {"bernotok", no_argument, NULL, OPTION_ERNOTOK},
 200     {"berok", no_argument, NULL, OPTION_EROK},
 201     {"berrmsg", no_argument, NULL, OPTION_IGNORE},
 202     {"bexport", required_argument, NULL, OPTION_EXPORT},
 203     {"bf", no_argument, NULL, OPTION_ERNOTOK},
 204     {"bgc", no_argument, &gc, 1},
 205     {"bh", required_argument, NULL, OPTION_IGNORE},
 206     {"bhalt", required_argument, NULL, OPTION_IGNORE},
 207     {"bI", required_argument, NULL, OPTION_IMPORT},
 208     {"bimport", required_argument, NULL, OPTION_IMPORT},
 209     {"binitfini", required_argument, NULL, OPTION_INITFINI},
 210     {"bl", required_argument, NULL, OPTION_LOADMAP},
 211     {"bloadmap", required_argument, NULL, OPTION_LOADMAP},
 212     {"bmaxdata", required_argument, NULL, OPTION_MAXDATA},
 213     {"bmaxstack", required_argument, NULL, OPTION_MAXSTACK},
 214     {"bM", required_argument, NULL, OPTION_MODTYPE},
 215     {"bmodtype", required_argument, NULL, OPTION_MODTYPE},
 216     {"bnoautoimp", no_argument, NULL, OPTION_NOAUTOIMP},
 217     {"bnodelcsect", no_argument, NULL, OPTION_IGNORE},
 218     {"bnoentry", no_argument, NULL, OPTION_IGNORE},
 219     {"bnogc", no_argument, &gc, 0},
 220     {"bnso", no_argument, NULL, OPTION_NOAUTOIMP},
 221     {"bnostrcmpct", no_argument, NULL, OPTION_NOSTRCMPCT},
 222     {"bnotextro", no_argument, &textro, 0},
 223     {"bnro", no_argument, &textro, 0},
 224     {"bpD", required_argument, NULL, OPTION_PD},
 225     {"bpT", required_argument, NULL, OPTION_PT},
 226     {"bro", no_argument, &textro, 1},
 227     {"brtl", no_argument, &rtld, 1},
 228     {"bnortl", no_argument, &rtld, 0},
 229     {"bnortllib", no_argument, &rtld, 0},
 230     {"bS", required_argument, NULL, OPTION_MAXSTACK},
 231     {"bso", no_argument, NULL, OPTION_AUTOIMP},
 232     {"bstrcmpct", no_argument, NULL, OPTION_STRCMPCT},
 233     {"btextro", no_argument, &textro, 1},
 234     {"b32", no_argument, NULL, OPTION_32},
 235     {"b64", no_argument, NULL, OPTION_64},
 236     {"static", no_argument, NULL, OPTION_NOAUTOIMP},
 237     {"unix", no_argument, NULL, OPTION_UNIX},
 238     {"blibpath", required_argument, NULL, OPTION_LIBPATH},
 239     {"bnolibpath", required_argument, NULL, OPTION_NOLIBPATH},
 240     {NULL, no_argument, NULL, 0}
 241   };
 242
 243   /* Options supported by the AIX linker which we do not support: -f,
 244      -S, -v, -Z, -bbindcmds, -bbinder, -bbindopts, -bcalls, -bcaps,
 245      -bcror15, -bdebugopt, -bdbg, -bdelcsect, -bex?, -bfilelist, -bfl,
 246      -bgcbypass, -bglink, -binsert, -bi, -bloadmap, -bl, -bmap, -bnl,
 247      -bnobind, -bnocomprld, -bnocrld, -bnoerrmsg, -bnoglink,
 248      -bnoloadmap, -bnl, -bnoobjreorder, -bnoquiet, -bnoreorder,
 249      -bnotypchk, -bnox, -bquiet, -bR, -brename, -breorder, -btypchk,
 250      -bx, -bX, -bxref.  */
 251
 252   *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
 253   memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
 254   *longopts = xrealloc (*longopts,
 255                         nl * sizeof (struct option) + sizeof (xtra_long));
 256   memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
 257 }
 258
 259 static bfd_boolean
 260 gld${EMULATION_NAME}_parse_args (int argc, char **argv)
 261 {
 262   int indx;
 263
 264   /* If the current option starts with -b, change the first : to an =.
 265      The AIX linker uses : to separate the option from the argument;
 266      changing it to = lets us treat it as a getopt option.  */
 267   indx = optind;
 268   if (indx == 0)
 269     indx = 1;
 270
 271   if (indx < argc && strncmp (argv[indx], "-b", 2) == 0)
 272     {
 273       char *s;
 274
 275       for (s = argv[indx]; *s != '\0'; s++)
 276         {
 277           if (*s == ':')
 278             {
 279               *s = '=';
 280               break;
 281             }
 282         }
 283     }
 284   return FALSE;
 285 }
 286
 287 static bfd_boolean
 288 gld${EMULATION_NAME}_handle_option (int optc)
 289 {
 290   bfd_signed_vma val;
 291   const char *end;
 292
 293   switch (optc)
 294     {
 295     default:
 296       return FALSE;
 297
 298     case 0:
 299       /* Long option which just sets a flag.  */
 300       break;
 301
 302     case 'D':
 303       val = bfd_scan_vma (optarg, &end, 0);
 304       if (*end != '\0')
 305         einfo ("%P: warning: ignoring invalid -D number %s\n", optarg);
 306       else if (val != -1)
 307         lang_section_start (".data", exp_intop (val), NULL);
 308       break;
 309
 310     case 'H':
 311       val = bfd_scan_vma (optarg, &end, 0);
 312       if (*end != '\0' || (val & (val - 1)) != 0)
 313         einfo ("%P: warning: ignoring invalid -H number %s\n", optarg);
 314       else
 315         file_align = val;
 316       break;
 317
 318     case 'K':
 319     case 'z':
 320       /* FIXME: This should use the page size for the target system.  */
 321       file_align = 4096;
 322       break;
 323
 324     case 'T':
 325       /* On AIX this is the same as GNU ld -Ttext.  When we see -T
 326          number, we assume the AIX option is intended.  Otherwise, we
 327          assume the usual GNU ld -T option is intended.  We can't just
 328          ignore the AIX option, because gcc passes it to the linker.  */
 329       val = bfd_scan_vma (optarg, &end, 0);
 330       if (*end != '\0')
 331         return FALSE;
 332       lang_section_start (".text", exp_intop (val), NULL);
 333       break;
 334
 335     case OPTION_IGNORE:
 336       break;
 337
 338     case OPTION_INITFINI:
 339       {
 340         /*
 341          * The aix linker init fini has the format :
 342          *
 343          * -binitfini:[ Initial][:Termination][:Priority]
 344          *
 345          * it allows the Termination and Priority to be optional.
 346          *
 347          * Since we support only one init/fini pair, we ignore the Priority.
 348          *
 349          * Define the special symbol __rtinit.
 350          *
 351          * strtok does not correctly handle the case of -binitfini::fini: so
 352          * do it by hand
 353          */
 354         char *t, *i, *f;
 355
 356         i = t = optarg;
 357         while (*t && ':' != *t)
 358           t++;
 359         if (*t)
 360           *t++ = 0;
 361
 362         if (0 != strlen (i))
 363           link_info.init_function = i;
 364
 365         f = t;
 366         while (*t && ':' != *t)
 367           t++;
 368         *t = 0;
 369
 370         if (0 != strlen (f))
 371           link_info.fini_function = f;
 372       }
 373       break;
 374
 375     case OPTION_AUTOIMP:
 376       link_info.static_link = FALSE;
 377       break;
 378
 379     case OPTION_ERNOTOK:
 380       force_make_executable = FALSE;
 381       break;
 382
 383     case OPTION_EROK:
 384       force_make_executable = TRUE;
 385       break;
 386
 387     case OPTION_EXPORT:
 388       gld${EMULATION_NAME}_read_file (optarg, FALSE);
 389       break;
 390
 391     case OPTION_IMPORT:
 392       {
 393         struct filelist *n;
 394         struct filelist **flpp;
 395
 396         n = (struct filelist *) xmalloc (sizeof (struct filelist));
 397         n->next = NULL;
 398         n->name = optarg;
 399         flpp = &import_files;
 400         while (*flpp != NULL)
 401           flpp = &(*flpp)->next;
 402         *flpp = n;
 403       }
 404       break;
 405
 406     case OPTION_LOADMAP:
 407       config.map_filename = optarg;
 408       break;
 409
 410     case OPTION_MAXDATA:
 411       val = bfd_scan_vma (optarg, &end, 0);
 412       if (*end != '\0')
 413         einfo ("%P: warning: ignoring invalid -bmaxdata number %s\n", optarg);
 414       else
 415         maxdata = val;
 416       break;
 417
 418     case OPTION_MAXSTACK:
 419       val = bfd_scan_vma (optarg, &end, 0);
 420       if (*end != '\0')
 421         einfo ("%P: warning: ignoring invalid -bmaxstack number %s\n",
 422                optarg);
 423       else
 424         maxstack = val;
 425       break;
 426
 427     case OPTION_MODTYPE:
 428       if (*optarg == 'S')
 429         {
 430           link_info.shared = TRUE;
 431           ++optarg;
 432         }
 433       if (*optarg == '\0' || optarg[1] == '\0')
 434         einfo ("%P: warning: ignoring invalid module type %s\n", optarg);
 435       else
 436         modtype = (*optarg << 8) | optarg[1];
 437       break;
 438
 439     case OPTION_NOAUTOIMP:
 440       link_info.static_link = TRUE;
 441       break;
 442
 443     case OPTION_NOSTRCMPCT:
 444       link_info.traditional_format = TRUE;
 445       break;
 446
 447     case OPTION_PD:
 448       /* This sets the page that the .data section is supposed to
 449          start on.  The offset within the page should still be the
 450          offset within the file, so we need to build an appropriate
 451          expression.  */
 452       val = bfd_scan_vma (optarg, &end, 0);
 453       if (*end != '\0')
 454         einfo ("%P: warning: ignoring invalid -pD number %s\n", optarg);
 455       else
 456         {
 457           etree_type *t;
 458
 459           t = exp_binop ('+',
 460                          exp_intop (val),
 461                          exp_binop ('&',
 462                                     exp_nameop (NAME, "."),
 463                                     exp_intop (0xfff)));
 464           t = exp_binop ('&',
 465                          exp_binop ('+', t, exp_intop (31)),
 466                          exp_intop (~(bfd_vma) 31));
 467           lang_section_start (".data", t, NULL);
 468         }
 469       break;
 470
 471     case OPTION_PT:
 472       /* This set the page that the .text section is supposed to start
 473          on.  The offset within the page should still be the offset
 474          within the file.  */
 475       val = bfd_scan_vma (optarg, &end, 0);
 476       if (*end != '\0')
 477         einfo ("%P: warning: ignoring invalid -pT number %s\n", optarg);
 478       else
 479         {
 480           etree_type *t;
 481
 482           t = exp_binop ('+',
 483                          exp_intop (val),
 484                          exp_nameop (SIZEOF_HEADERS, NULL));
 485           t = exp_binop ('&',
 486                          exp_binop ('+', t, exp_intop (31)),
 487                          exp_intop (~(bfd_vma) 31));
 488           lang_section_start (".text", t, NULL);
 489         }
 490       break;
 491
 492     case OPTION_STRCMPCT:
 493       link_info.traditional_format = FALSE;
 494       break;
 495
 496     case OPTION_UNIX:
 497       unix_ld = TRUE;
 498       break;
 499
 500     case OPTION_32:
 501       is_64bit = 0;
 502       syscall_mask = 0x77;
 503       symbol_mode_mask = 0x0d;
 504       break;
 505
 506     case OPTION_64:
 507       is_64bit = 1;
 508       syscall_mask = 0xcc;
 509       symbol_mode_mask = 0x0e;
 510       break;
 511
 512     case OPTION_LIBPATH:
 513       command_line_blibpath = optarg;
 514       break;
 515
 516     case OPTION_NOLIBPATH:
 517       command_line_blibpath = NULL;
 518       break;
 519
 520     }
 521
 522   return TRUE;
 523 }
 524
 525 /* This is called when an input file can not be recognized as a BFD
 526    object or an archive.  If the file starts with #!, we must treat it
 527    as an import file.  This is for AIX compatibility.  */
 528
 529 static bfd_boolean
 530 gld${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry)
 531 {
 532   FILE *e;
 533   bfd_boolean ret;
 534
 535   e = fopen (entry->filename, FOPEN_RT);
 536   if (e == NULL)
 537     return FALSE;
 538
 539   ret = FALSE;
 540
 541   if (getc (e) == '#' && getc (e) == '!')
 542     {
 543       struct filelist *n;
 544       struct filelist **flpp;
 545
 546       n = (struct filelist *) xmalloc (sizeof (struct filelist));
 547       n->next = NULL;
 548       n->name = entry->filename;
 549       flpp = &import_files;
 550       while (*flpp != NULL)
 551         flpp = &(*flpp)->next;
 552       *flpp = n;
 553
 554       ret = TRUE;
 555       entry->loaded = TRUE;
 556     }
 557
 558   fclose (e);
 559
 560   return ret;
 561 }
 562
 563 /* This is called after the input files have been opened.  */
 564
 565 static void
 566 gld${EMULATION_NAME}_after_open (void)
 567 {
 568   bfd_boolean r;
 569   struct set_info *p;
 570
 571   /* Call ldctor_build_sets, after pretending that this is a
 572      relocatable link.  We do this because AIX requires relocation
 573      entries for all references to symbols, even in a final
 574      executable.  Of course, we only want to do this if we are
 575      producing an XCOFF output file.  */
 576   r = link_info.relocatable;
 577   if (strstr (bfd_get_target (output_bfd), "xcoff") != NULL)
 578     link_info.relocatable = TRUE;
 579   ldctor_build_sets ();
 580   link_info.relocatable = r;
 581
 582   /* For each set, record the size, so that the XCOFF backend can
 583      output the correct csect length.  */
 584   for (p = sets; p != (struct set_info *) NULL; p = p->next)
 585     {
 586       bfd_size_type size;
 587
 588       /* If the symbol is defined, we may have been invoked from
 589          collect, and the sets may already have been built, so we do
 590          not do anything.  */
 591       if (p->h->type == bfd_link_hash_defined
 592           || p->h->type == bfd_link_hash_defweak)
 593         continue;
 594
 595       if (p->reloc != BFD_RELOC_CTOR)
 596         {
 597           /* Handle this if we need to.  */
 598           abort ();
 599         }
 600
 601       size = (p->count + 2) * 4;
 602       if (!bfd_xcoff_link_record_set (output_bfd, &link_info, p->h, size))
 603         einfo ("%F%P: bfd_xcoff_link_record_set failed: %E\n");
 604     }
 605 }
 606
 607 /* This is called after the sections have been attached to output
 608    sections, but before any sizes or addresses have been set.  */
 609
 610 static void
 611 gld${EMULATION_NAME}_before_allocation (void)
 612 {
 613   struct filelist *fl;
 614   struct export_symbol_list *el;
 615   char *libpath;
 616   asection *special_sections[XCOFF_NUMBER_OF_SPECIAL_SECTIONS];
 617   int i;
 618
 619   /* Handle the import and export files, if any.  */
 620   for (fl = import_files; fl != NULL; fl = fl->next)
 621     gld${EMULATION_NAME}_read_file (fl->name, TRUE);
 622   for (el = export_symbols; el != NULL; el = el->next)
 623     {
 624       struct bfd_link_hash_entry *h;
 625
 626       h = bfd_link_hash_lookup (link_info.hash, el->name, FALSE, FALSE, FALSE);
 627       if (h == NULL)
 628         einfo ("%P%F: bfd_link_hash_lookup of export symbol failed: %E\n");
 629       if (!bfd_xcoff_export_symbol (output_bfd, &link_info, h))
 630         einfo ("%P%F: bfd_xcoff_export_symbol failed: %E\n");
 631     }
 632
 633   /* Track down all relocations called for by the linker script (these
 634      are typically constructor/destructor entries created by
 635      CONSTRUCTORS) and let the backend know it will need to create
 636      .loader relocs for them.  */
 637   lang_for_each_statement (gld${EMULATION_NAME}_find_relocs);
 638
 639   /* Precedence of LIBPATH
 640      -blibpath:  native support always first
 641      -rpath:     gnu extension
 642      -L          build from command line -L's */
 643   if (command_line_blibpath != NULL)
 644     libpath = command_line_blibpath;
 645   else if (command_line.rpath != NULL)
 646     libpath = command_line.rpath;
 647   else if (search_head == NULL)
 648     libpath = (char *) "";
 649   else
 650     {
 651       size_t len;
 652       search_dirs_type *search;
 653
 654       len = strlen (search_head->name);
 655       libpath = xmalloc (len + 1);
 656       strcpy (libpath, search_head->name);
 657       for (search = search_head->next; search != NULL; search = search->next)
 658         {
 659           size_t nlen;
 660
 661           nlen = strlen (search->name);
 662           libpath = xrealloc (libpath, len + nlen + 2);
 663           libpath[len] = ':';
 664           strcpy (libpath + len + 1, search->name);
 665           len += nlen + 1;
 666         }
 667     }
 668
 669   /* Let the XCOFF backend set up the .loader section.  */
 670   if (!bfd_xcoff_size_dynamic_sections
 671       (output_bfd, &link_info, libpath, entry_symbol.name, file_align,
 672        maxstack, maxdata, gc && !unix_ld ? TRUE : FALSE,
 673        modtype, textro ? TRUE : FALSE, unix_ld, special_sections,
 674        rtld ? TRUE : FALSE))
 675     einfo ("%P%F: failed to set dynamic section sizes: %E\n");
 676
 677   /* Look through the special sections, and put them in the right
 678      place in the link ordering.  This is especially magic.  */
 679   for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++)
 680     {
 681       asection *sec;
 682       lang_output_section_statement_type *os;
 683       lang_statement_union_type **pls;
 684       lang_input_section_type *is;
 685       const char *oname;
 686       bfd_boolean start;
 687
 688       sec = special_sections[i];
 689       if (sec == NULL)
 690         continue;
 691
 692       /* Remove this section from the list of the output section.
 693          This assumes we know what the script looks like.  */
 694       is = NULL;
 695       os = lang_output_section_find (sec->output_section->name);
 696       if (os == NULL)
 697         einfo ("%P%F: can't find output section %s\n",
 698                sec->output_section->name);
 699
 700       for (pls = &os->children.head; *pls != NULL; pls = &(*pls)->header.next)
 701         {
 702           if ((*pls)->header.type == lang_input_section_enum
 703               && (*pls)->input_section.section == sec)
 704             {
 705               is = (lang_input_section_type *) * pls;
 706               *pls = (*pls)->header.next;
 707               break;
 708             }
 709
 710           if ((*pls)->header.type == lang_wild_statement_enum)
 711             {
 712               lang_statement_union_type **pwls;
 713
 714               for (pwls = &(*pls)->wild_statement.children.head;
 715                    *pwls != NULL; pwls = &(*pwls)->header.next)
 716                 {
 717
 718                   if ((*pwls)->header.type == lang_input_section_enum
 719                       && (*pwls)->input_section.section == sec)
 720                     {
 721                       is = (lang_input_section_type *) * pwls;
 722                       *pwls = (*pwls)->header.next;
 723                       break;
 724                     }
 725                 }
 726
 727               if (is != NULL)
 728                 break;
 729             }
 730         }
 731
 732       if (is == NULL)
 733         {
 734           einfo ("%P%F: can't find %s in output section\n",
 735                  bfd_get_section_name (sec->owner, sec));
 736         }
 737
 738       /* Now figure out where the section should go.  */
 739       switch (i)
 740         {
 741
 742         default:                /* to avoid warnings */
 743         case XCOFF_SPECIAL_SECTION_TEXT:
 744           /* _text */
 745           oname = ".text";
 746           start = TRUE;
 747           break;
 748
 749         case XCOFF_SPECIAL_SECTION_ETEXT:
 750           /* _etext */
 751           oname = ".text";
 752           start = FALSE;
 753           break;
 754
 755         case XCOFF_SPECIAL_SECTION_DATA:
 756           /* _data */
 757           oname = ".data";
 758           start = TRUE;
 759           break;
 760
 761         case XCOFF_SPECIAL_SECTION_EDATA:
 762           /* _edata */
 763           oname = ".data";
 764           start = FALSE;
 765           break;
 766
 767         case XCOFF_SPECIAL_SECTION_END:
 768         case XCOFF_SPECIAL_SECTION_END2:
 769           /* _end and end */
 770           oname = ".bss";
 771           start = FALSE;
 772           break;
 773         }
 774
 775       os = lang_output_section_find (oname);
 776
 777       if (start)
 778         {
 779           is->header.next = os->children.head;
 780           os->children.head = (lang_statement_union_type *) is;
 781         }
 782       else
 783         {
 784           is->header.next = NULL;
 785           lang_statement_append (&os->children,
 786                                  (lang_statement_union_type *) is,
 787                                  &is->header.next);
 788         }
 789     }
 790
 791   if (!link_info.relocatable)
 792     strip_excluded_output_sections ();
 793 }
 794
 795 static char *
 796 gld${EMULATION_NAME}_choose_target (int argc, char **argv)
 797 {
 798   int i, j, jmax;
 799   static char *from_outside;
 800   static char *from_inside;
 801   static char *argv_to_target[][2] = {
 802     {NULL,   "${OUTPUT_FORMAT}"},
 803     {"-b32", "${OUTPUT_FORMAT_32BIT}"},
 804     {"-b64", "${OUTPUT_FORMAT_64BIT}"},
 805   };
 806
 807   jmax = 3;
 808
 809   from_outside = getenv (TARGET_ENVIRON);
 810   if (from_outside != (char *) NULL)
 811     return from_outside;
 812
 813   /* Set to default. */
 814   from_inside = argv_to_target[0][1];
 815   for (i = 1; i < argc; i++)
 816     {
 817       for (j = 1; j < jmax; j++)
 818         {
 819           if (0 == strcmp (argv[i], argv_to_target[j][0]))
 820             from_inside = argv_to_target[j][1];
 821         }
 822     }
 823
 824   return from_inside;
 825 }
 826
 827 /* Returns
 828    1 : state changed
 829    0 : no change */
 830 static int
 831 change_symbol_mode (char *input)
 832 {
 833   char *symbol_mode_string[] = {
 834     "# 32",                     /* 0x01 */
 835     "# 64",                     /* 0x02 */
 836     "# no32",                   /* 0x04 */
 837     "# no64",                   /* 0x08 */
 838     NULL,
 839   };
 840
 841   unsigned int bit;
 842   char *string;
 843
 844   for (bit = 0;; bit++)
 845     {
 846       string = symbol_mode_string[bit];
 847       if (string == NULL)
 848         return 0;
 849
 850       if (0 == strcmp (input, string))
 851         {
 852           symbol_mode = (1 << bit);
 853           return 1;
 854         }
 855     }
 856   /* should not be here */
 857   return 0;
 858 }
 859
 860 /* Returns
 861    1 : yes
 862    0 : ignore
 863    -1 : error, try something else */
 864 static int
 865 is_syscall (char *input, 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 handle_option emulation routine.  */
 913
 914 static void
 915 gld${EMULATION_NAME}_read_file (const char *filename, bfd_boolean import)
 916 {
 917   struct obstack *o;
 918   FILE *f;
 919   int lineno;
 920   int c;
 921   bfd_boolean keep;
 922   const char *imppath;
 923   const char *impfile;
 924   const char *impmember;
 925
 926   o = (struct obstack *) xmalloc (sizeof (struct obstack));
 927   obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
 928
 929   f = fopen (filename, FOPEN_RT);
 930   if (f == NULL)
 931     {
 932       bfd_set_error (bfd_error_system_call);
 933       einfo ("%F%s: %E\n", filename);
 934     }
 935
 936   keep = FALSE;
 937
 938   imppath = NULL;
 939   impfile = NULL;
 940   impmember = NULL;
 941
 942   lineno = 0;
 943
 944   /* Default to 32 and 64 bit mode
 945      symbols at top of /lib/syscalls.exp do not have a mode modifier and they
 946      are not repeated, assume 64 bit routines also want to use them.
 947      See the routine change_symbol_mode for more information.  */
 948
 949   symbol_mode = 0x04;
 950
 951   while ((c = getc (f)) != EOF)
 952     {
 953       char *s;
 954       char *symname;
 955       unsigned int syscall_flag = 0;
 956       bfd_vma address;
 957       struct bfd_link_hash_entry *h;
 958
 959       if (c != '\n')
 960         {
 961           obstack_1grow (o, c);
 962           continue;
 963         }
 964
 965       obstack_1grow (o, '\0');
 966       ++lineno;
 967
 968       s = (char *) obstack_base (o);
 969       while (ISSPACE (*s))
 970         ++s;
 971       if (*s == '\0'
 972           || *s == '*'
 973           || change_symbol_mode (s)
 974           || (*s == '#' && s[1] == ' ')
 975           || (!import && *s == '#' && s[1] == '!'))
 976         {
 977           obstack_free (o, obstack_base (o));
 978           continue;
 979         }
 980
 981       if (*s == '#' && s[1] == '!')
 982         {
 983           s += 2;
 984           while (ISSPACE (*s))
 985             ++s;
 986           if (*s == '\0')
 987             {
 988               imppath = NULL;
 989               impfile = NULL;
 990               impmember = NULL;
 991               obstack_free (o, obstack_base (o));
 992             }
 993           else if (*s == '(')
 994             einfo ("%F%s%d: #! ([member]) is not supported in import files\n",
 995                    filename, lineno);
 996           else
 997             {
 998               char cs;
 999               char *file;
1000
1001               (void) obstack_finish (o);
1002               keep = TRUE;
1003               imppath = s;
1004               file = NULL;
1005               while (!ISSPACE (*s) && *s != '(' && *s != '\0')
1006                 {
1007                   if (*s == '/')
1008                     file = s + 1;
1009                   ++s;
1010                 }
1011               if (file != NULL)
1012                 {
1013                   file[-1] = '\0';
1014                   impfile = file;
1015                   if (imppath == file - 1)
1016                     imppath = "/";
1017                 }
1018               else
1019                 {
1020                   impfile = imppath;
1021                   imppath = "";
1022                 }
1023               cs = *s;
1024               *s = '\0';
1025               while (ISSPACE (cs))
1026                 {
1027                   ++s;
1028                   cs = *s;
1029                 }
1030               if (cs != '(')
1031                 {
1032                   impmember = "";
1033                   if (cs != '\0')
1034                     einfo ("%s:%d: warning: syntax error in import file\n",
1035                            filename, lineno);
1036                 }
1037               else
1038                 {
1039                   ++s;
1040                   impmember = s;
1041                   while (*s != ')' && *s != '\0')
1042                     ++s;
1043                   if (*s == ')')
1044                     *s = '\0';
1045                   else
1046                     einfo ("%s:%d: warning: syntax error in import file\n",
1047                            filename, lineno);
1048                 }
1049             }
1050
1051           continue;
1052         }
1053
1054       if (symbol_mode & symbol_mode_mask)
1055         {
1056           /* This is a symbol to be imported or exported.  */
1057           symname = s;
1058           syscall_flag = 0;
1059           address = (bfd_vma) -1;
1060
1061           while (!ISSPACE (*s) && *s != '\0')
1062             ++s;
1063           if (*s != '\0')
1064             {
1065               char *se;
1066
1067               *s++ = '\0';
1068
1069               while (ISSPACE (*s))
1070                 ++s;
1071
1072               se = s;
1073               while (!ISSPACE (*se) && *se != '\0')
1074                 ++se;
1075               if (*se != '\0')
1076                 {
1077                   *se++ = '\0';
1078                   while (ISSPACE (*se))
1079                     ++se;
1080                   if (*se != '\0')
1081                     einfo ("%s%d: warning: syntax error in import/export file\n",
1082                            filename, lineno);
1083                 }
1084
1085               if (s != se)
1086                 {
1087                   int status;
1088                   const char *end;
1089
1090                   status = is_syscall (s, &syscall_flag);
1091
1092                   if (0 > status)
1093                     {
1094                       /* not a system call, check for address */
1095                       address = bfd_scan_vma (s, &end, 0);
1096                       if (*end != '\0')
1097                         {
1098                           einfo ("%s:%d: warning: syntax error in import/export file\n",
1099                                  filename, lineno);
1100
1101                         }
1102                     }
1103                 }
1104             }
1105
1106           if (!import)
1107             {
1108               struct export_symbol_list *n;
1109
1110               ldlang_add_undef (symname);
1111               n = ((struct export_symbol_list *)
1112                    xmalloc (sizeof (struct export_symbol_list)));
1113               n->next = export_symbols;
1114               n->name = xstrdup (symname);
1115               export_symbols = n;
1116             }
1117           else
1118             {
1119               h = bfd_link_hash_lookup (link_info.hash, symname, FALSE, FALSE,
1120                                         TRUE);
1121               if (h == NULL || h->type == bfd_link_hash_new)
1122                 {
1123                   /* We can just ignore attempts to import an unreferenced
1124                      symbol.  */
1125                 }
1126               else
1127                 {
1128                   if (!bfd_xcoff_import_symbol (output_bfd, &link_info, h,
1129                                                 address, imppath, impfile,
1130                                                 impmember, syscall_flag))
1131                     einfo ("%X%s:%d: failed to import symbol %s: %E\n",
1132                            filename, lineno, symname);
1133                 }
1134             }
1135         }
1136       obstack_free (o, obstack_base (o));
1137     }
1138
1139   if (obstack_object_size (o) > 0)
1140     {
1141       einfo ("%s:%d: warning: ignoring unterminated last line\n",
1142              filename, lineno);
1143       obstack_free (o, obstack_base (o));
1144     }
1145
1146   if (!keep)
1147     {
1148       obstack_free (o, NULL);
1149       free (o);
1150     }
1151 }
1152
1153 /* This routine saves us from worrying about declaring free.  */
1154
1155 static void
1156 gld${EMULATION_NAME}_free (void *p)
1157 {
1158   free (p);
1159 }
1160
1161 /* This is called by the before_allocation routine via
1162    lang_for_each_statement.  It looks for relocations and assignments
1163    to symbols.  */
1164
1165 static void
1166 gld${EMULATION_NAME}_find_relocs (lang_statement_union_type *s)
1167 {
1168   if (s->header.type == lang_reloc_statement_enum)
1169     {
1170       lang_reloc_statement_type *rs;
1171
1172       rs = &s->reloc_statement;
1173       if (rs->name == NULL)
1174         einfo ("%F%P: only relocations against symbols are permitted\n");
1175       if (!bfd_xcoff_link_count_reloc (output_bfd, &link_info, rs->name))
1176         einfo ("%F%P: bfd_xcoff_link_count_reloc failed: %E\n");
1177     }
1178
1179   if (s->header.type == lang_assignment_statement_enum)
1180     gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1181 }
1182
1183 /* Look through an expression for an assignment statement.  */
1184
1185 static void
1186 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1187 {
1188   struct bfd_link_hash_entry *h;
1189
1190   switch (exp->type.node_class)
1191     {
1192     case etree_provide:
1193       h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
1194                                 FALSE, FALSE, FALSE);
1195       if (h == NULL)
1196         break;
1197       /* Fall through.  */
1198     case etree_assign:
1199       if (strcmp (exp->assign.dst, ".") != 0)
1200         {
1201           if (!bfd_xcoff_record_link_assignment (output_bfd, &link_info,
1202                                                  exp->assign.dst))
1203             einfo ("%P%F: failed to record assignment to %s: %E\n",
1204                    exp->assign.dst);
1205         }
1206       gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1207       break;
1208
1209     case etree_binary:
1210       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1211       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1212       break;
1213
1214     case etree_trinary:
1215       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1216       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1217       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1218       break;
1219
1220     case etree_unary:
1221       gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1222       break;
1223
1224     default:
1225       break;
1226     }
1227 }
1228
1229 static char *
1230 gld${EMULATION_NAME}_get_script (int *isfile)
1231 EOF
1232
1233 if test -n "$COMPILE_IN"
1234 then
1235 # Scripts compiled in.
1236
1237 # sed commands to quote an ld script as a C string.
1238 sc="-f ${srcdir}/emultempl/ostring.sed"
1239
1240 cat >>e${EMULATION_NAME}.c <<EOF
1241 {
1242   *isfile = 0;
1243
1244   if (link_info.relocatable && config.build_constructors)
1245     return
1246 EOF
1247 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
1248 echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
1249 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
1250 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
1251 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
1252 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1253 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
1254 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
1255 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
1256 echo '; }'                                             >> e${EMULATION_NAME}.c
1257
1258 else
1259 # Scripts read from the filesystem.
1260
1261 cat >>e${EMULATION_NAME}.c <<EOF
1262 {
1263   *isfile = 1;
1264
1265   if (link_info.relocatable && config.build_constructors)
1266     return "ldscripts/${EMULATION_NAME}.xu";
1267   else if (link_info.relocatable)
1268     return "ldscripts/${EMULATION_NAME}.xr";
1269   else if (!config.text_read_only)
1270     return "ldscripts/${EMULATION_NAME}.xbn";
1271   else if (!config.magic_demand_paged)
1272     return "ldscripts/${EMULATION_NAME}.xn";
1273   else
1274     return "ldscripts/${EMULATION_NAME}.x";
1275 }
1276 EOF
1277
1278 fi
1279
1280 cat >>e${EMULATION_NAME}.c <<EOF
1281
1282 static void
1283 gld${EMULATION_NAME}_create_output_section_statements (void)
1284 {
1285   /* __rtinit */
1286   if ((bfd_get_flavour (output_bfd) == bfd_target_xcoff_flavour)
1287       && (link_info.init_function != NULL
1288           || link_info.fini_function != NULL
1289           || rtld))
1290     {
1291       initfini_file = lang_add_input_file ("initfini",
1292                                            lang_input_file_is_file_enum,
1293                                            NULL);
1294
1295       initfini_file->the_bfd = bfd_create ("initfini", output_bfd);
1296       if (initfini_file->the_bfd == NULL
1297           || ! bfd_set_arch_mach (initfini_file->the_bfd,
1298                                   bfd_get_arch (output_bfd),
1299                                   bfd_get_mach (output_bfd)))
1300         {
1301           einfo ("%X%P: can not create BFD %E\n");
1302           return;
1303         }
1304
1305       /* Call backend to fill in the rest */
1306       if (! bfd_xcoff_link_generate_rtinit (initfini_file->the_bfd,
1307                                             link_info.init_function,
1308                                             link_info.fini_function,
1309                                             rtld))
1310         {
1311           einfo ("%X%P: can not create BFD %E\n");
1312           return;
1313         }
1314
1315       /* __rtld defined in /lib/librtl.a */
1316       if (rtld)
1317         lang_add_input_file ("rtl", lang_input_file_is_l_enum, NULL);
1318     }
1319 }
1320
1321 static void
1322 gld${EMULATION_NAME}_set_output_arch (void)
1323 {
1324   bfd_set_arch_mach (output_bfd,
1325                      bfd_xcoff_architecture (output_bfd),
1326                      bfd_xcoff_machine (output_bfd));
1327
1328   ldfile_output_architecture = bfd_get_arch (output_bfd);
1329   ldfile_output_machine = bfd_get_mach (output_bfd);
1330   ldfile_output_machine_name = bfd_printable_name (output_bfd);
1331 }
1332
1333 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = {
1334   gld${EMULATION_NAME}_before_parse,
1335   syslib_default,
1336   hll_default,
1337   after_parse_default,
1338   gld${EMULATION_NAME}_after_open,
1339   after_allocation_default,
1340   gld${EMULATION_NAME}_set_output_arch,
1341   gld${EMULATION_NAME}_choose_target,
1342   gld${EMULATION_NAME}_before_allocation,
1343   gld${EMULATION_NAME}_get_script,
1344   "${EMULATION_NAME}",
1345   "${OUTPUT_FORMAT}",
1346   0,                            /* finish */
1347   gld${EMULATION_NAME}_create_output_section_statements,
1348   0,                            /* open_dynamic_archive */
1349   0,                            /* place_orphan */
1350   0,                            /* set_symbols */
1351   gld${EMULATION_NAME}_parse_args,
1352   gld${EMULATION_NAME}_add_options,
1353   gld${EMULATION_NAME}_handle_option,
1354   gld${EMULATION_NAME}_unrecognized_file,
1355   NULL,                         /* list_options */
1356   NULL,                         /* recognized_file */
1357   NULL,                         /* find potential_libraries */
1358   NULL                          /* new_vers_pattern */
1359 };
1360 EOF