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 ${EMULATION_NAME}
  12    Copyright 1991, 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
  13    2003, 2004
  14    Free Software Foundation, Inc.
  15    Written by Steve Chamberlain <sac@cygnus.com>
  16    AIX support by Ian Lance Taylor <ian@cygnus.com>
  17    AIX 64 bit support by Tom Rix <trix@redhat.com>
  18
  19 This file is part of GLD, the Gnu Linker.
  20
  21 This program is free software; you can redistribute it and/or modify
  22 it under the terms of the GNU General Public License as published by
  23 the Free Software Foundation; either version 2 of the License, or
  24 (at your option) any later version.
  25
  26 This program is distributed in the hope that it will be useful,
  27 but WITHOUT ANY WARRANTY; without even the implied warranty of
  28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  29 GNU General Public License for more details.
  30
  31 You should have received a copy of the GNU General Public License
  32 along with this program; if not, write to the Free Software
  33 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  34
  35 #define TARGET_IS_${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
 792 static char *
 793 gld${EMULATION_NAME}_choose_target (int argc, char **argv)
 794 {
 795   int i, j, jmax;
 796   static char *from_outside;
 797   static char *from_inside;
 798   static char *argv_to_target[][2] = {
 799     {NULL,   "${OUTPUT_FORMAT}"},
 800     {"-b32", "${OUTPUT_FORMAT_32BIT}"},
 801     {"-b64", "${OUTPUT_FORMAT_64BIT}"},
 802   };
 803
 804   jmax = 3;
 805
 806   from_outside = getenv (TARGET_ENVIRON);
 807   if (from_outside != (char *) NULL)
 808     return from_outside;
 809
 810   /* Set to default. */
 811   from_inside = argv_to_target[0][1];
 812   for (i = 1; i < argc; i++)
 813     {
 814       for (j = 1; j < jmax; j++)
 815         {
 816           if (0 == strcmp (argv[i], argv_to_target[j][0]))
 817             from_inside = argv_to_target[j][1];
 818         }
 819     }
 820
 821   return from_inside;
 822 }
 823
 824 /* Returns
 825    1 : state changed
 826    0 : no change */
 827 static int
 828 change_symbol_mode (char *input)
 829 {
 830   char *symbol_mode_string[] = {
 831     "# 32",                     /* 0x01 */
 832     "# 64",                     /* 0x02 */
 833     "# no32",                   /* 0x04 */
 834     "# no64",                   /* 0x08 */
 835     NULL,
 836   };
 837
 838   unsigned int bit;
 839   char *string;
 840
 841   for (bit = 0;; bit++)
 842     {
 843       string = symbol_mode_string[bit];
 844       if (string == NULL)
 845         return 0;
 846
 847       if (0 == strcmp (input, string))
 848         {
 849           symbol_mode = (1 << bit);
 850           return 1;
 851         }
 852     }
 853   /* should not be here */
 854   return 0;
 855 }
 856
 857 /* Returns
 858    1 : yes
 859    0 : ignore
 860    -1 : error, try something else */
 861 static int
 862 is_syscall (char *input, unsigned int *flag)
 863 {
 864   unsigned int bit;
 865   char *string;
 866
 867   struct sc {
 868     char *syscall_string;
 869     unsigned int flag;
 870   } s [] = {
 871     { "svc"         /* 0x01 */, XCOFF_SYSCALL32 },
 872     { "svc32"       /* 0x02 */, XCOFF_SYSCALL32 },
 873     { "svc3264"     /* 0x04 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
 874     { "svc64"       /* 0x08 */, XCOFF_SYSCALL64 },
 875     { "syscall"     /* 0x10 */, XCOFF_SYSCALL32 },
 876     { "syscall32"   /* 0x20 */, XCOFF_SYSCALL32 },
 877     { "syscall3264" /* 0x40 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
 878     { "syscall64"   /* 0x80 */, XCOFF_SYSCALL64 },
 879     { NULL, 0 },
 880   };
 881
 882   *flag = 0;
 883
 884   for (bit = 0;; bit++)
 885     {
 886       string = s[bit].syscall_string;
 887       if (string == NULL)
 888         return -1;
 889
 890       if (0 == strcmp (input, string))
 891         {
 892           if (1 << bit & syscall_mask)
 893             {
 894               *flag = s[bit].flag;
 895               return 1;
 896             }
 897           else
 898             {
 899               return 0;
 900             }
 901         }
 902     }
 903   /* should not be here */
 904   return -1;
 905 }
 906
 907 /* Read an import or export file.  For an import file, this is called
 908    by the before_allocation emulation routine.  For an export file,
 909    this is called by the handle_option emulation routine.  */
 910
 911 static void
 912 gld${EMULATION_NAME}_read_file (const char *filename, bfd_boolean import)
 913 {
 914   struct obstack *o;
 915   FILE *f;
 916   int lineno;
 917   int c;
 918   bfd_boolean keep;
 919   const char *imppath;
 920   const char *impfile;
 921   const char *impmember;
 922
 923   o = (struct obstack *) xmalloc (sizeof (struct obstack));
 924   obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
 925
 926   f = fopen (filename, FOPEN_RT);
 927   if (f == NULL)
 928     {
 929       bfd_set_error (bfd_error_system_call);
 930       einfo ("%F%s: %E\n", filename);
 931     }
 932
 933   keep = FALSE;
 934
 935   imppath = NULL;
 936   impfile = NULL;
 937   impmember = NULL;
 938
 939   lineno = 0;
 940
 941   /* Default to 32 and 64 bit mode
 942      symbols at top of /lib/syscalls.exp do not have a mode modifier and they
 943      are not repeated, assume 64 bit routines also want to use them.
 944      See the routine change_symbol_mode for more information.  */
 945
 946   symbol_mode = 0x04;
 947
 948   while ((c = getc (f)) != EOF)
 949     {
 950       char *s;
 951       char *symname;
 952       unsigned int syscall_flag = 0;
 953       bfd_vma address;
 954       struct bfd_link_hash_entry *h;
 955
 956       if (c != '\n')
 957         {
 958           obstack_1grow (o, c);
 959           continue;
 960         }
 961
 962       obstack_1grow (o, '\0');
 963       ++lineno;
 964
 965       s = (char *) obstack_base (o);
 966       while (ISSPACE (*s))
 967         ++s;
 968       if (*s == '\0'
 969           || *s == '*'
 970           || change_symbol_mode (s)
 971           || (*s == '#' && s[1] == ' ')
 972           || (!import && *s == '#' && s[1] == '!'))
 973         {
 974           obstack_free (o, obstack_base (o));
 975           continue;
 976         }
 977
 978       if (*s == '#' && s[1] == '!')
 979         {
 980           s += 2;
 981           while (ISSPACE (*s))
 982             ++s;
 983           if (*s == '\0')
 984             {
 985               imppath = NULL;
 986               impfile = NULL;
 987               impmember = NULL;
 988               obstack_free (o, obstack_base (o));
 989             }
 990           else if (*s == '(')
 991             einfo ("%F%s%d: #! ([member]) is not supported in import files\n",
 992                    filename, lineno);
 993           else
 994             {
 995               char cs;
 996               char *file;
 997
 998               (void) obstack_finish (o);
 999               keep = TRUE;
1000               imppath = s;
1001               file = NULL;
1002               while (!ISSPACE (*s) && *s != '(' && *s != '\0')
1003                 {
1004                   if (*s == '/')
1005                     file = s + 1;
1006                   ++s;
1007                 }
1008               if (file != NULL)
1009                 {
1010                   file[-1] = '\0';
1011                   impfile = file;
1012                   if (imppath == file - 1)
1013                     imppath = "/";
1014                 }
1015               else
1016                 {
1017                   impfile = imppath;
1018                   imppath = "";
1019                 }
1020               cs = *s;
1021               *s = '\0';
1022               while (ISSPACE (cs))
1023                 {
1024                   ++s;
1025                   cs = *s;
1026                 }
1027               if (cs != '(')
1028                 {
1029                   impmember = "";
1030                   if (cs != '\0')
1031                     einfo ("%s:%d: warning: syntax error in import file\n",
1032                            filename, lineno);
1033                 }
1034               else
1035                 {
1036                   ++s;
1037                   impmember = s;
1038                   while (*s != ')' && *s != '\0')
1039                     ++s;
1040                   if (*s == ')')
1041                     *s = '\0';
1042                   else
1043                     einfo ("%s:%d: warning: syntax error in import file\n",
1044                            filename, lineno);
1045                 }
1046             }
1047
1048           continue;
1049         }
1050
1051       if (symbol_mode & symbol_mode_mask)
1052         {
1053           /* This is a symbol to be imported or exported.  */
1054           symname = s;
1055           syscall_flag = 0;
1056           address = (bfd_vma) -1;
1057
1058           while (!ISSPACE (*s) && *s != '\0')
1059             ++s;
1060           if (*s != '\0')
1061             {
1062               char *se;
1063
1064               *s++ = '\0';
1065
1066               while (ISSPACE (*s))
1067                 ++s;
1068
1069               se = s;
1070               while (!ISSPACE (*se) && *se != '\0')
1071                 ++se;
1072               if (*se != '\0')
1073                 {
1074                   *se++ = '\0';
1075                   while (ISSPACE (*se))
1076                     ++se;
1077                   if (*se != '\0')
1078                     einfo ("%s%d: warning: syntax error in import/export file\n",
1079                            filename, lineno);
1080                 }
1081
1082               if (s != se)
1083                 {
1084                   int status;
1085                   const char *end;
1086
1087                   status = is_syscall (s, &syscall_flag);
1088
1089                   if (0 > status)
1090                     {
1091                       /* not a system call, check for address */
1092                       address = bfd_scan_vma (s, &end, 0);
1093                       if (*end != '\0')
1094                         {
1095                           einfo ("%s:%d: warning: syntax error in import/export file\n",
1096                                  filename, lineno);
1097
1098                         }
1099                     }
1100                 }
1101             }
1102
1103           if (!import)
1104             {
1105               struct export_symbol_list *n;
1106
1107               ldlang_add_undef (symname);
1108               n = ((struct export_symbol_list *)
1109                    xmalloc (sizeof (struct export_symbol_list)));
1110               n->next = export_symbols;
1111               n->name = xstrdup (symname);
1112               export_symbols = n;
1113             }
1114           else
1115             {
1116               h = bfd_link_hash_lookup (link_info.hash, symname, FALSE, FALSE,
1117                                         TRUE);
1118               if (h == NULL || h->type == bfd_link_hash_new)
1119                 {
1120                   /* We can just ignore attempts to import an unreferenced
1121                      symbol.  */
1122                 }
1123               else
1124                 {
1125                   if (!bfd_xcoff_import_symbol (output_bfd, &link_info, h,
1126                                                 address, imppath, impfile,
1127                                                 impmember, syscall_flag))
1128                     einfo ("%X%s:%d: failed to import symbol %s: %E\n",
1129                            filename, lineno, symname);
1130                 }
1131             }
1132         }
1133       obstack_free (o, obstack_base (o));
1134     }
1135
1136   if (obstack_object_size (o) > 0)
1137     {
1138       einfo ("%s:%d: warning: ignoring unterminated last line\n",
1139              filename, lineno);
1140       obstack_free (o, obstack_base (o));
1141     }
1142
1143   if (!keep)
1144     {
1145       obstack_free (o, NULL);
1146       free (o);
1147     }
1148 }
1149
1150 /* This routine saves us from worrying about declaring free.  */
1151
1152 static void
1153 gld${EMULATION_NAME}_free (void *p)
1154 {
1155   free (p);
1156 }
1157
1158 /* This is called by the before_allocation routine via
1159    lang_for_each_statement.  It looks for relocations and assignments
1160    to symbols.  */
1161
1162 static void
1163 gld${EMULATION_NAME}_find_relocs (lang_statement_union_type *s)
1164 {
1165   if (s->header.type == lang_reloc_statement_enum)
1166     {
1167       lang_reloc_statement_type *rs;
1168
1169       rs = &s->reloc_statement;
1170       if (rs->name == NULL)
1171         einfo ("%F%P: only relocations against symbols are permitted\n");
1172       if (!bfd_xcoff_link_count_reloc (output_bfd, &link_info, rs->name))
1173         einfo ("%F%P: bfd_xcoff_link_count_reloc failed: %E\n");
1174     }
1175
1176   if (s->header.type == lang_assignment_statement_enum)
1177     gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1178 }
1179
1180 /* Look through an expression for an assignment statement.  */
1181
1182 static void
1183 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1184 {
1185   struct bfd_link_hash_entry *h;
1186
1187   switch (exp->type.node_class)
1188     {
1189     case etree_provide:
1190       h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
1191                                 FALSE, FALSE, FALSE);
1192       if (h == NULL)
1193         break;
1194       /* Fall through.  */
1195     case etree_assign:
1196       if (strcmp (exp->assign.dst, ".") != 0)
1197         {
1198           if (!bfd_xcoff_record_link_assignment (output_bfd, &link_info,
1199                                                  exp->assign.dst))
1200             einfo ("%P%F: failed to record assignment to %s: %E\n",
1201                    exp->assign.dst);
1202         }
1203       gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1204       break;
1205
1206     case etree_binary:
1207       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1208       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1209       break;
1210
1211     case etree_trinary:
1212       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1213       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1214       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1215       break;
1216
1217     case etree_unary:
1218       gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1219       break;
1220
1221     default:
1222       break;
1223     }
1224 }
1225
1226 static char *
1227 gld${EMULATION_NAME}_get_script (int *isfile)
1228 EOF
1229
1230 if test -n "$COMPILE_IN"
1231 then
1232 # Scripts compiled in.
1233
1234 # sed commands to quote an ld script as a C string.
1235 sc="-f ${srcdir}/emultempl/ostring.sed"
1236
1237 cat >>e${EMULATION_NAME}.c <<EOF
1238 {
1239   *isfile = 0;
1240
1241   if (link_info.relocatable && config.build_constructors)
1242     return
1243 EOF
1244 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
1245 echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
1246 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
1247 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
1248 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
1249 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1250 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
1251 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
1252 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
1253 echo '; }'                                             >> e${EMULATION_NAME}.c
1254
1255 else
1256 # Scripts read from the filesystem.
1257
1258 cat >>e${EMULATION_NAME}.c <<EOF
1259 {
1260   *isfile = 1;
1261
1262   if (link_info.relocatable && config.build_constructors)
1263     return "ldscripts/${EMULATION_NAME}.xu";
1264   else if (link_info.relocatable)
1265     return "ldscripts/${EMULATION_NAME}.xr";
1266   else if (!config.text_read_only)
1267     return "ldscripts/${EMULATION_NAME}.xbn";
1268   else if (!config.magic_demand_paged)
1269     return "ldscripts/${EMULATION_NAME}.xn";
1270   else
1271     return "ldscripts/${EMULATION_NAME}.x";
1272 }
1273 EOF
1274
1275 fi
1276
1277 cat >>e${EMULATION_NAME}.c <<EOF
1278
1279 static void
1280 gld${EMULATION_NAME}_create_output_section_statements (void)
1281 {
1282   /* __rtinit */
1283   if ((bfd_get_flavour (output_bfd) == bfd_target_xcoff_flavour)
1284       && (link_info.init_function != NULL
1285           || link_info.fini_function != NULL
1286           || rtld))
1287     {
1288       initfini_file = lang_add_input_file ("initfini",
1289                                            lang_input_file_is_file_enum,
1290                                            NULL);
1291
1292       initfini_file->the_bfd = bfd_create ("initfini", output_bfd);
1293       if (initfini_file->the_bfd == NULL
1294           || ! bfd_set_arch_mach (initfini_file->the_bfd,
1295                                   bfd_get_arch (output_bfd),
1296                                   bfd_get_mach (output_bfd)))
1297         {
1298           einfo ("%X%P: can not create BFD %E\n");
1299           return;
1300         }
1301
1302       /* Call backend to fill in the rest */
1303       if (! bfd_xcoff_link_generate_rtinit (initfini_file->the_bfd,
1304                                             link_info.init_function,
1305                                             link_info.fini_function,
1306                                             rtld))
1307         {
1308           einfo ("%X%P: can not create BFD %E\n");
1309           return;
1310         }
1311
1312       /* __rtld defined in /lib/librtl.a */
1313       if (rtld)
1314         lang_add_input_file ("rtl", lang_input_file_is_l_enum, NULL);
1315     }
1316 }
1317
1318 static void
1319 gld${EMULATION_NAME}_set_output_arch (void)
1320 {
1321   bfd_set_arch_mach (output_bfd,
1322                      bfd_xcoff_architecture (output_bfd),
1323                      bfd_xcoff_machine (output_bfd));
1324
1325   ldfile_output_architecture = bfd_get_arch (output_bfd);
1326   ldfile_output_machine = bfd_get_mach (output_bfd);
1327   ldfile_output_machine_name = bfd_printable_name (output_bfd);
1328 }
1329
1330 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = {
1331   gld${EMULATION_NAME}_before_parse,
1332   syslib_default,
1333   hll_default,
1334   after_parse_default,
1335   gld${EMULATION_NAME}_after_open,
1336   after_allocation_default,
1337   gld${EMULATION_NAME}_set_output_arch,
1338   gld${EMULATION_NAME}_choose_target,
1339   gld${EMULATION_NAME}_before_allocation,
1340   gld${EMULATION_NAME}_get_script,
1341   "${EMULATION_NAME}",
1342   "${OUTPUT_FORMAT}",
1343   0,                            /* finish */
1344   gld${EMULATION_NAME}_create_output_section_statements,
1345   0,                            /* open_dynamic_archive */
1346   0,                            /* place_orphan */
1347   0,                            /* set_symbols */
1348   gld${EMULATION_NAME}_parse_args,
1349   gld${EMULATION_NAME}_add_options,
1350   gld${EMULATION_NAME}_handle_option,
1351   gld${EMULATION_NAME}_unrecognized_file,
1352   NULL,                         /* list_options */
1353   NULL,                         /* recognized_file */
1354   NULL,                         /* find potential_libraries */
1355   NULL                          /* new_vers_pattern */
1356 };
1357 EOF