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 ${EMULATION_NAME}
  12    Copyright 1991, 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
  13    2003, 2004, 2005, 2006
  14    Free Software Foundation, Inc.
  15    Written by Steve Chamberlain <sac@cygnus.com>
  16    AIX support by Ian Lance Taylor <ian@cygnus.com>
  17    AIX 64 bit support by Tom Rix <trix@redhat.com>
  18
  19 This file is part of GLD, the Gnu Linker.
  20
  21 This program is free software; you can redistribute it and/or modify
  22 it under the terms of the GNU General Public License as published by
  23 the Free Software Foundation; either version 2 of the License, or
  24 (at your option) any later version.
  25
  26 This program is distributed in the hope that it will be useful,
  27 but WITHOUT ANY WARRANTY; without even the implied warranty of
  28 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  29 GNU General Public License for more details.
  30
  31 You should have received a copy of the GNU General Public License
  32 along with this program; if not, write to the Free Software
  33 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  34
  35 #define TARGET_IS_${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${EMULATION_NAME}_parse_args (int argc, char **argv)
 261 {
 262   int indx;
 263
 264   /* If the current option starts with -b, change the first : to an =.
 265      The AIX linker uses : to separate the option from the argument;
 266      changing it to = lets us treat it as a getopt option.  */
 267   indx = optind;
 268   if (indx == 0)
 269     indx = 1;
 270
 271   if (indx < argc && CONST_STRNEQ (argv[indx], "-b"))
 272     {
 273       char *s;
 274
 275       for (s = argv[indx]; *s != '\0'; s++)
 276         {
 277           if (*s == ':')
 278             {
 279               *s = '=';
 280               break;
 281             }
 282         }
 283     }
 284   return FALSE;
 285 }
 286
 287 static bfd_boolean
 288 gld${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   before_allocation_default ();
 792 }
 793
 794 static char *
 795 gld${EMULATION_NAME}_choose_target (int argc, char **argv)
 796 {
 797   int i, j, jmax;
 798   static char *from_outside;
 799   static char *from_inside;
 800   static char *argv_to_target[][2] = {
 801     {NULL,   "${OUTPUT_FORMAT}"},
 802     {"-b32", "${OUTPUT_FORMAT_32BIT}"},
 803     {"-b64", "${OUTPUT_FORMAT_64BIT}"},
 804   };
 805
 806   jmax = 3;
 807
 808   from_outside = getenv (TARGET_ENVIRON);
 809   if (from_outside != (char *) NULL)
 810     return from_outside;
 811
 812   /* Set to default. */
 813   from_inside = argv_to_target[0][1];
 814   for (i = 1; i < argc; i++)
 815     {
 816       for (j = 1; j < jmax; j++)
 817         {
 818           if (0 == strcmp (argv[i], argv_to_target[j][0]))
 819             from_inside = argv_to_target[j][1];
 820         }
 821     }
 822
 823   return from_inside;
 824 }
 825
 826 /* Returns
 827    1 : state changed
 828    0 : no change */
 829 static int
 830 change_symbol_mode (char *input)
 831 {
 832   char *symbol_mode_string[] = {
 833     "# 32",                     /* 0x01 */
 834     "# 64",                     /* 0x02 */
 835     "# no32",                   /* 0x04 */
 836     "# no64",                   /* 0x08 */
 837     NULL,
 838   };
 839
 840   unsigned int bit;
 841   char *string;
 842
 843   for (bit = 0;; bit++)
 844     {
 845       string = symbol_mode_string[bit];
 846       if (string == NULL)
 847         return 0;
 848
 849       if (0 == strcmp (input, string))
 850         {
 851           symbol_mode = (1 << bit);
 852           return 1;
 853         }
 854     }
 855   /* should not be here */
 856   return 0;
 857 }
 858
 859 /* Returns
 860    1 : yes
 861    0 : ignore
 862    -1 : error, try something else */
 863 static int
 864 is_syscall (char *input, unsigned int *flag)
 865 {
 866   unsigned int bit;
 867   char *string;
 868
 869   struct sc {
 870     char *syscall_string;
 871     unsigned int flag;
 872   } s [] = {
 873     { "svc"         /* 0x01 */, XCOFF_SYSCALL32 },
 874     { "svc32"       /* 0x02 */, XCOFF_SYSCALL32 },
 875     { "svc3264"     /* 0x04 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
 876     { "svc64"       /* 0x08 */, XCOFF_SYSCALL64 },
 877     { "syscall"     /* 0x10 */, XCOFF_SYSCALL32 },
 878     { "syscall32"   /* 0x20 */, XCOFF_SYSCALL32 },
 879     { "syscall3264" /* 0x40 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
 880     { "syscall64"   /* 0x80 */, XCOFF_SYSCALL64 },
 881     { NULL, 0 },
 882   };
 883
 884   *flag = 0;
 885
 886   for (bit = 0;; bit++)
 887     {
 888       string = s[bit].syscall_string;
 889       if (string == NULL)
 890         return -1;
 891
 892       if (0 == strcmp (input, string))
 893         {
 894           if (1 << bit & syscall_mask)
 895             {
 896               *flag = s[bit].flag;
 897               return 1;
 898             }
 899           else
 900             {
 901               return 0;
 902             }
 903         }
 904     }
 905   /* should not be here */
 906   return -1;
 907 }
 908
 909 /* Read an import or export file.  For an import file, this is called
 910    by the before_allocation emulation routine.  For an export file,
 911    this is called by the handle_option emulation routine.  */
 912
 913 static void
 914 gld${EMULATION_NAME}_read_file (const char *filename, bfd_boolean import)
 915 {
 916   struct obstack *o;
 917   FILE *f;
 918   int lineno;
 919   int c;
 920   bfd_boolean keep;
 921   const char *imppath;
 922   const char *impfile;
 923   const char *impmember;
 924
 925   o = (struct obstack *) xmalloc (sizeof (struct obstack));
 926   obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
 927
 928   f = fopen (filename, FOPEN_RT);
 929   if (f == NULL)
 930     {
 931       bfd_set_error (bfd_error_system_call);
 932       einfo ("%F%s: %E\n", filename);
 933     }
 934
 935   keep = FALSE;
 936
 937   imppath = NULL;
 938   impfile = NULL;
 939   impmember = NULL;
 940
 941   lineno = 0;
 942
 943   /* Default to 32 and 64 bit mode
 944      symbols at top of /lib/syscalls.exp do not have a mode modifier and they
 945      are not repeated, assume 64 bit routines also want to use them.
 946      See the routine change_symbol_mode for more information.  */
 947
 948   symbol_mode = 0x04;
 949
 950   while ((c = getc (f)) != EOF)
 951     {
 952       char *s;
 953       char *symname;
 954       unsigned int syscall_flag = 0;
 955       bfd_vma address;
 956       struct bfd_link_hash_entry *h;
 957
 958       if (c != '\n')
 959         {
 960           obstack_1grow (o, c);
 961           continue;
 962         }
 963
 964       obstack_1grow (o, '\0');
 965       ++lineno;
 966
 967       s = (char *) obstack_base (o);
 968       while (ISSPACE (*s))
 969         ++s;
 970       if (*s == '\0'
 971           || *s == '*'
 972           || change_symbol_mode (s)
 973           || (*s == '#' && s[1] == ' ')
 974           || (!import && *s == '#' && s[1] == '!'))
 975         {
 976           obstack_free (o, obstack_base (o));
 977           continue;
 978         }
 979
 980       if (*s == '#' && s[1] == '!')
 981         {
 982           s += 2;
 983           while (ISSPACE (*s))
 984             ++s;
 985           if (*s == '\0')
 986             {
 987               imppath = NULL;
 988               impfile = NULL;
 989               impmember = NULL;
 990               obstack_free (o, obstack_base (o));
 991             }
 992           else if (*s == '(')
 993             einfo ("%F%s%d: #! ([member]) is not supported in import files\n",
 994                    filename, lineno);
 995           else
 996             {
 997               char cs;
 998               char *file;
 999
1000               (void) obstack_finish (o);
1001               keep = TRUE;
1002               imppath = s;
1003               file = NULL;
1004               while (!ISSPACE (*s) && *s != '(' && *s != '\0')
1005                 {
1006                   if (*s == '/')
1007                     file = s + 1;
1008                   ++s;
1009                 }
1010               if (file != NULL)
1011                 {
1012                   file[-1] = '\0';
1013                   impfile = file;
1014                   if (imppath == file - 1)
1015                     imppath = "/";
1016                 }
1017               else
1018                 {
1019                   impfile = imppath;
1020                   imppath = "";
1021                 }
1022               cs = *s;
1023               *s = '\0';
1024               while (ISSPACE (cs))
1025                 {
1026                   ++s;
1027                   cs = *s;
1028                 }
1029               if (cs != '(')
1030                 {
1031                   impmember = "";
1032                   if (cs != '\0')
1033                     einfo ("%s:%d: warning: syntax error in import file\n",
1034                            filename, lineno);
1035                 }
1036               else
1037                 {
1038                   ++s;
1039                   impmember = s;
1040                   while (*s != ')' && *s != '\0')
1041                     ++s;
1042                   if (*s == ')')
1043                     *s = '\0';
1044                   else
1045                     einfo ("%s:%d: warning: syntax error in import file\n",
1046                            filename, lineno);
1047                 }
1048             }
1049
1050           continue;
1051         }
1052
1053       if (symbol_mode & symbol_mode_mask)
1054         {
1055           /* This is a symbol to be imported or exported.  */
1056           symname = s;
1057           syscall_flag = 0;
1058           address = (bfd_vma) -1;
1059
1060           while (!ISSPACE (*s) && *s != '\0')
1061             ++s;
1062           if (*s != '\0')
1063             {
1064               char *se;
1065
1066               *s++ = '\0';
1067
1068               while (ISSPACE (*s))
1069                 ++s;
1070
1071               se = s;
1072               while (!ISSPACE (*se) && *se != '\0')
1073                 ++se;
1074               if (*se != '\0')
1075                 {
1076                   *se++ = '\0';
1077                   while (ISSPACE (*se))
1078                     ++se;
1079                   if (*se != '\0')
1080                     einfo ("%s%d: warning: syntax error in import/export file\n",
1081                            filename, lineno);
1082                 }
1083
1084               if (s != se)
1085                 {
1086                   int status;
1087                   const char *end;
1088
1089                   status = is_syscall (s, &syscall_flag);
1090
1091                   if (0 > status)
1092                     {
1093                       /* not a system call, check for address */
1094                       address = bfd_scan_vma (s, &end, 0);
1095                       if (*end != '\0')
1096                         {
1097                           einfo ("%s:%d: warning: syntax error in import/export file\n",
1098                                  filename, lineno);
1099
1100                         }
1101                     }
1102                 }
1103             }
1104
1105           if (!import)
1106             {
1107               struct export_symbol_list *n;
1108
1109               ldlang_add_undef (symname);
1110               n = ((struct export_symbol_list *)
1111                    xmalloc (sizeof (struct export_symbol_list)));
1112               n->next = export_symbols;
1113               n->name = xstrdup (symname);
1114               export_symbols = n;
1115             }
1116           else
1117             {
1118               h = bfd_link_hash_lookup (link_info.hash, symname, FALSE, FALSE,
1119                                         TRUE);
1120               if (h == NULL || h->type == bfd_link_hash_new)
1121                 {
1122                   /* We can just ignore attempts to import an unreferenced
1123                      symbol.  */
1124                 }
1125               else
1126                 {
1127                   if (!bfd_xcoff_import_symbol (output_bfd, &link_info, h,
1128                                                 address, imppath, impfile,
1129                                                 impmember, syscall_flag))
1130                     einfo ("%X%s:%d: failed to import symbol %s: %E\n",
1131                            filename, lineno, symname);
1132                 }
1133             }
1134         }
1135       obstack_free (o, obstack_base (o));
1136     }
1137
1138   if (obstack_object_size (o) > 0)
1139     {
1140       einfo ("%s:%d: warning: ignoring unterminated last line\n",
1141              filename, lineno);
1142       obstack_free (o, obstack_base (o));
1143     }
1144
1145   if (!keep)
1146     {
1147       obstack_free (o, NULL);
1148       free (o);
1149     }
1150 }
1151
1152 /* This routine saves us from worrying about declaring free.  */
1153
1154 static void
1155 gld${EMULATION_NAME}_free (void *p)
1156 {
1157   free (p);
1158 }
1159
1160 /* This is called by the before_allocation routine via
1161    lang_for_each_statement.  It looks for relocations and assignments
1162    to symbols.  */
1163
1164 static void
1165 gld${EMULATION_NAME}_find_relocs (lang_statement_union_type *s)
1166 {
1167   if (s->header.type == lang_reloc_statement_enum)
1168     {
1169       lang_reloc_statement_type *rs;
1170
1171       rs = &s->reloc_statement;
1172       if (rs->name == NULL)
1173         einfo ("%F%P: only relocations against symbols are permitted\n");
1174       if (!bfd_xcoff_link_count_reloc (output_bfd, &link_info, rs->name))
1175         einfo ("%F%P: bfd_xcoff_link_count_reloc failed: %E\n");
1176     }
1177
1178   if (s->header.type == lang_assignment_statement_enum)
1179     gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1180 }
1181
1182 /* Look through an expression for an assignment statement.  */
1183
1184 static void
1185 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1186 {
1187   struct bfd_link_hash_entry *h;
1188
1189   switch (exp->type.node_class)
1190     {
1191     case etree_provide:
1192       h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
1193                                 FALSE, FALSE, FALSE);
1194       if (h == NULL)
1195         break;
1196       /* Fall through.  */
1197     case etree_assign:
1198       if (strcmp (exp->assign.dst, ".") != 0)
1199         {
1200           if (!bfd_xcoff_record_link_assignment (output_bfd, &link_info,
1201                                                  exp->assign.dst))
1202             einfo ("%P%F: failed to record assignment to %s: %E\n",
1203                    exp->assign.dst);
1204         }
1205       gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1206       break;
1207
1208     case etree_binary:
1209       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1210       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1211       break;
1212
1213     case etree_trinary:
1214       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1215       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1216       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1217       break;
1218
1219     case etree_unary:
1220       gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1221       break;
1222
1223     default:
1224       break;
1225     }
1226 }
1227
1228 static char *
1229 gld${EMULATION_NAME}_get_script (int *isfile)
1230 EOF
1231
1232 if test -n "$COMPILE_IN"
1233 then
1234 # Scripts compiled in.
1235
1236 # sed commands to quote an ld script as a C string.
1237 sc="-f ${srcdir}/emultempl/ostring.sed"
1238
1239 cat >>e${EMULATION_NAME}.c <<EOF
1240 {
1241   *isfile = 0;
1242
1243   if (link_info.relocatable && config.build_constructors)
1244     return
1245 EOF
1246 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
1247 echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
1248 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
1249 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
1250 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
1251 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1252 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
1253 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
1254 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
1255 echo '; }'                                             >> e${EMULATION_NAME}.c
1256
1257 else
1258 # Scripts read from the filesystem.
1259
1260 cat >>e${EMULATION_NAME}.c <<EOF
1261 {
1262   *isfile = 1;
1263
1264   if (link_info.relocatable && config.build_constructors)
1265     return "ldscripts/${EMULATION_NAME}.xu";
1266   else if (link_info.relocatable)
1267     return "ldscripts/${EMULATION_NAME}.xr";
1268   else if (!config.text_read_only)
1269     return "ldscripts/${EMULATION_NAME}.xbn";
1270   else if (!config.magic_demand_paged)
1271     return "ldscripts/${EMULATION_NAME}.xn";
1272   else
1273     return "ldscripts/${EMULATION_NAME}.x";
1274 }
1275 EOF
1276
1277 fi
1278
1279 cat >>e${EMULATION_NAME}.c <<EOF
1280
1281 static void
1282 gld${EMULATION_NAME}_create_output_section_statements (void)
1283 {
1284   /* __rtinit */
1285   if ((bfd_get_flavour (output_bfd) == bfd_target_xcoff_flavour)
1286       && (link_info.init_function != NULL
1287           || link_info.fini_function != NULL
1288           || rtld))
1289     {
1290       initfini_file = lang_add_input_file ("initfini",
1291                                            lang_input_file_is_file_enum,
1292                                            NULL);
1293
1294       initfini_file->the_bfd = bfd_create ("initfini", output_bfd);
1295       if (initfini_file->the_bfd == NULL
1296           || ! bfd_set_arch_mach (initfini_file->the_bfd,
1297                                   bfd_get_arch (output_bfd),
1298                                   bfd_get_mach (output_bfd)))
1299         {
1300           einfo ("%X%P: can not create BFD %E\n");
1301           return;
1302         }
1303
1304       /* Call backend to fill in the rest */
1305       if (! bfd_xcoff_link_generate_rtinit (initfini_file->the_bfd,
1306                                             link_info.init_function,
1307                                             link_info.fini_function,
1308                                             rtld))
1309         {
1310           einfo ("%X%P: can not create BFD %E\n");
1311           return;
1312         }
1313
1314       /* __rtld defined in /lib/librtl.a */
1315       if (rtld)
1316         lang_add_input_file ("rtl", lang_input_file_is_l_enum, NULL);
1317     }
1318 }
1319
1320 static void
1321 gld${EMULATION_NAME}_set_output_arch (void)
1322 {
1323   bfd_set_arch_mach (output_bfd,
1324                      bfd_xcoff_architecture (output_bfd),
1325                      bfd_xcoff_machine (output_bfd));
1326
1327   ldfile_output_architecture = bfd_get_arch (output_bfd);
1328   ldfile_output_machine = bfd_get_mach (output_bfd);
1329   ldfile_output_machine_name = bfd_printable_name (output_bfd);
1330 }
1331
1332 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = {
1333   gld${EMULATION_NAME}_before_parse,
1334   syslib_default,
1335   hll_default,
1336   after_parse_default,
1337   gld${EMULATION_NAME}_after_open,
1338   after_allocation_default,
1339   gld${EMULATION_NAME}_set_output_arch,
1340   gld${EMULATION_NAME}_choose_target,
1341   gld${EMULATION_NAME}_before_allocation,
1342   gld${EMULATION_NAME}_get_script,
1343   "${EMULATION_NAME}",
1344   "${OUTPUT_FORMAT}",
1345   finish_default,
1346   gld${EMULATION_NAME}_create_output_section_statements,
1347   0,                            /* open_dynamic_archive */
1348   0,                            /* place_orphan */
1349   0,                            /* set_symbols */
1350   gld${EMULATION_NAME}_parse_args,
1351   gld${EMULATION_NAME}_add_options,
1352   gld${EMULATION_NAME}_handle_option,
1353   gld${EMULATION_NAME}_unrecognized_file,
1354   NULL,                         /* list_options */
1355   NULL,                         /* recognized_file */
1356   NULL,                         /* find potential_libraries */
1357   NULL                          /* new_vers_pattern */
1358 };
1359 EOF