ld/emultempl/sunos.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 fragment <<EOF
   9 /* This file is is generated by a shell script.  DO NOT EDIT! */
  10
  11 /* SunOS emulation code for ${EMULATION_NAME}
  12    Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
  13    2002, 2003, 2004, 2005, 2006, 2007, 2008, 2012
  14    Free Software Foundation, Inc.
  15    Written by Steve Chamberlain <sac@cygnus.com>
  16    SunOS shared library support by Ian Lance Taylor <ian@cygnus.com>
  17
  18    This file is part of the GNU Binutils.
  19
  20    This program is free software; you can redistribute it and/or modify
  21    it under the terms of the GNU General Public License as published by
  22    the Free Software Foundation; either version 3 of the License, or
  23    (at your option) any later version.
  24
  25    This program is distributed in the hope that it will be useful,
  26    but WITHOUT ANY WARRANTY; without even the implied warranty of
  27    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28    GNU General Public License for more details.
  29
  30    You should have received a copy of the GNU General Public License
  31    along with this program; if not, write to the Free Software
  32    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  33    MA 02110-1301, USA.  */
  34
  35 #define TARGET_IS_${EMULATION_NAME}
  36
  37 #include "sysdep.h"
  38 #include "bfd.h"
  39 #include "bfdlink.h"
  40 #include "libiberty.h"
  41 #include "safe-ctype.h"
  42
  43 #include "ld.h"
  44 #include "ldmain.h"
  45 #include "ldmisc.h"
  46 #include "ldexp.h"
  47 #include "ldlang.h"
  48 #include "ldfile.h"
  49 #include "ldemul.h"
  50
  51 #ifdef HAVE_DIRENT_H
  52 # include <dirent.h>
  53 #else
  54 # define dirent direct
  55 # ifdef HAVE_SYS_NDIR_H
  56 #  include <sys/ndir.h>
  57 # endif
  58 # ifdef HAVE_SYS_DIR_H
  59 #  include <sys/dir.h>
  60 # endif
  61 # ifdef HAVE_NDIR_H
  62 #  include <ndir.h>
  63 # endif
  64 #endif
  65
  66 static void gld${EMULATION_NAME}_find_so
  67   (lang_input_statement_type *);
  68 static char *gld${EMULATION_NAME}_search_dir
  69   (const char *, const char *, bfd_boolean *);
  70 static void gld${EMULATION_NAME}_check_needed
  71   (lang_input_statement_type *);
  72 static bfd_boolean gld${EMULATION_NAME}_search_needed
  73   (const char *, const char *);
  74 static bfd_boolean gld${EMULATION_NAME}_try_needed
  75   (const char *, const char *);
  76 static void gld${EMULATION_NAME}_find_assignment
  77   (lang_statement_union_type *);
  78 static void gld${EMULATION_NAME}_find_exp_assignment
  79   (etree_type *);
  80 static void gld${EMULATION_NAME}_count_need
  81   (lang_input_statement_type *);
  82 static void gld${EMULATION_NAME}_set_need
  83   (lang_input_statement_type *);
  84
  85 static void
  86 gld${EMULATION_NAME}_before_parse (void)
  87 {
  88   ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
  89   input_flags.dynamic = TRUE;
  90   config.has_shared = TRUE;
  91 }
  92
  93 /* This is called after the command line arguments have been parsed,
  94    but before the linker script has been read.  If this is a native
  95    linker, we add the directories in LD_LIBRARY_PATH to the search
  96    list.  */
  97
  98 static void
  99 gld${EMULATION_NAME}_set_symbols (void)
 100 {
 101 EOF
 102 if [ "x${host}" = "x${target}" ] ; then
 103   case " ${EMULATION_LIBPATH} " in
 104   *" ${EMULATION_NAME} "*)
 105 fragment <<EOF
 106   const char *env;
 107
 108   env = (const char *) getenv ("LD_LIBRARY_PATH");
 109   if (env != NULL)
 110     {
 111       char *l;
 112
 113       l = xstrdup (env);
 114       while (1)
 115         {
 116           char *c;
 117
 118           c = strchr (l, ':');
 119           if (c != NULL)
 120             *c++ = '\0';
 121           if (*l != '\0')
 122             ldfile_add_library_path (l, FALSE);
 123           if (c == NULL)
 124             break;
 125           l = c;
 126         }
 127     }
 128 EOF
 129   ;;
 130   esac
 131 fi
 132 fragment <<EOF
 133 }
 134
 135 /* Despite the name, we use this routine to search for dynamic
 136    libraries.  On SunOS this requires a directory search.  We need to
 137    find the .so file with the highest version number.  The user may
 138    restrict the major version by saying, e.g., -lc.1.  Also, if we
 139    find a .so file, we need to look for a the same file after
 140    replacing .so with .sa; if it exists, it will be an archive which
 141    provide some initializations for data symbols, and we need to
 142    search it after including the .so file.  */
 143
 144 static void
 145 gld${EMULATION_NAME}_create_output_section_statements (void)
 146 {
 147   lang_for_each_input_file (gld${EMULATION_NAME}_find_so);
 148 }
 149
 150 /* Search the directory for a .so file for each library search.  */
 151
 152 static void
 153 gld${EMULATION_NAME}_find_so (lang_input_statement_type *inp)
 154 {
 155   search_dirs_type *search;
 156   char *found = NULL;
 157   char *alc;
 158   struct stat st;
 159
 160   if (! inp->flags.search_dirs
 161       || ! inp->flags.maybe_archive
 162       || ! inp->flags.dynamic)
 163     return;
 164
 165   ASSERT (CONST_STRNEQ (inp->local_sym_name, "-l"));
 166
 167   for (search = search_head; search != NULL; search = search->next)
 168     {
 169       bfd_boolean found_static;
 170
 171       found = gld${EMULATION_NAME}_search_dir (search->name, inp->filename,
 172                                                &found_static);
 173       if (found != NULL || found_static)
 174         break;
 175     }
 176
 177   if (found == NULL)
 178     {
 179       /* We did not find a matching .so file.  This isn't an error,
 180          since there might still be a matching .a file, which will be
 181          found by the usual search.  */
 182       return;
 183     }
 184
 185   /* Replace the filename with the one we have found.  */
 186   alc = (char *) xmalloc (strlen (search->name) + strlen (found) + 2);
 187   sprintf (alc, "%s/%s", search->name, found);
 188   inp->filename = alc;
 189
 190   /* Turn off the search_dirs_flag to prevent ldfile_open_file from
 191      searching for this file again.  */
 192   inp->flags.search_dirs = FALSE;
 193
 194   free (found);
 195
 196   /* Now look for the same file name, but with .sa instead of .so.  If
 197      found, add it to the list of input files.  */
 198   alc = (char *) xmalloc (strlen (inp->filename) + 1);
 199   strcpy (alc, inp->filename);
 200   strstr (alc + strlen (search->name), ".so")[2] = 'a';
 201   if (stat (alc, &st) != 0)
 202     free (alc);
 203   else
 204     {
 205       lang_input_statement_type *sa;
 206
 207       /* Add the .sa file to the statement list just before the .so
 208          file.  This is really a hack.  */
 209       sa = ((lang_input_statement_type *)
 210             xmalloc (sizeof (lang_input_statement_type)));
 211       *sa = *inp;
 212
 213       inp->filename = alc;
 214       inp->local_sym_name = alc;
 215
 216       inp->header.next = (lang_statement_union_type *) sa;
 217       inp->next_real_file = (lang_statement_union_type *) sa;
 218     }
 219 }
 220
 221 /* Search a directory for a .so file.  */
 222
 223 static char *
 224 gld${EMULATION_NAME}_search_dir
 225   (const char *dirname, const char *filename, bfd_boolean *found_static)
 226 {
 227   int force_maj, force_min;
 228   const char *dot;
 229   unsigned int len;
 230   char *alc;
 231   char *found;
 232   int max_maj, max_min;
 233   DIR *dir;
 234   struct dirent *entry;
 235   unsigned int dirnamelen;
 236   char *full_path;
 237   int statval;
 238   struct stat st;
 239
 240   *found_static = FALSE;
 241
 242   force_maj = -1;
 243   force_min = -1;
 244   dot = strchr (filename, '.');
 245   if (dot == NULL)
 246     {
 247       len = strlen (filename);
 248       alc = NULL;
 249     }
 250   else
 251     {
 252       force_maj = atoi (dot + 1);
 253
 254       len = dot - filename;
 255       alc = (char *) xmalloc (len + 1);
 256       strncpy (alc, filename, len);
 257       alc[len] = '\0';
 258       filename = alc;
 259
 260       dot = strchr (dot + 1, '.');
 261       if (dot != NULL)
 262         force_min = atoi (dot + 1);
 263     }
 264
 265   found = NULL;
 266   max_maj = max_min = 0;
 267
 268   dir = opendir (dirname);
 269   if (dir == NULL)
 270     return NULL;
 271   dirnamelen = strlen (dirname);
 272
 273   while ((entry = readdir (dir)) != NULL)
 274     {
 275       const char *s;
 276       int found_maj, found_min;
 277
 278       if (! CONST_STRNEQ (entry->d_name, "lib")
 279           || strncmp (entry->d_name + 3, filename, len) != 0)
 280         continue;
 281
 282       if (dot == NULL
 283           && strcmp (entry->d_name + 3 + len, ".a") == 0)
 284         {
 285           *found_static = TRUE;
 286           continue;
 287         }
 288
 289       /* We accept libfoo.so without a version number, even though the
 290          native linker does not.  This is more convenient for packages
 291          which just generate .so files for shared libraries, as on ELF
 292          systems.  */
 293       if (! CONST_STRNEQ (entry->d_name + 3 + len, ".so"))
 294         continue;
 295       if (entry->d_name[6 + len] == '\0')
 296         ;
 297       else if (entry->d_name[6 + len] == '.'
 298                && ISDIGIT (entry->d_name[7 + len]))
 299         ;
 300       else
 301         continue;
 302
 303       for (s = entry->d_name + 6 + len; *s != '\0'; s++)
 304         if (*s != '.' && ! ISDIGIT (*s))
 305           break;
 306       if (*s != '\0')
 307         continue;
 308
 309       /* We've found a .so file.  Work out the major and minor
 310          version numbers.  */
 311       found_maj = 0;
 312       found_min = 0;
 313       sscanf (entry->d_name + 3 + len, ".so.%d.%d",
 314               &found_maj, &found_min);
 315
 316       if ((force_maj != -1 && force_maj != found_maj)
 317           || (force_min != -1 && force_min != found_min))
 318         continue;
 319
 320       /* Make sure the file really exists (ignore broken symlinks).  */
 321       full_path = xmalloc (dirnamelen + 1 + strlen (entry->d_name) + 1);
 322       sprintf (full_path, "%s/%s", dirname, entry->d_name);
 323       statval = stat (full_path, &st);
 324       free (full_path);
 325       if (statval != 0)
 326         continue;
 327
 328       /* We've found a match for the name we are searching for.  See
 329          if this is the version we should use.  If the major and minor
 330          versions match, we use the last entry in alphabetical order;
 331          I don't know if this is how SunOS distinguishes libc.so.1.8
 332          from libc.so.1.8.1, but it ought to suffice.  */
 333       if (found == NULL
 334           || (found_maj > max_maj)
 335           || (found_maj == max_maj
 336               && (found_min > max_min
 337                   || (found_min == max_min
 338                       && strcmp (entry->d_name, found) > 0))))
 339         {
 340           if (found != NULL)
 341             free (found);
 342           found = (char *) xmalloc (strlen (entry->d_name) + 1);
 343           strcpy (found, entry->d_name);
 344           max_maj = found_maj;
 345           max_min = found_min;
 346         }
 347     }
 348
 349   closedir (dir);
 350
 351   if (alc != NULL)
 352     free (alc);
 353
 354   return found;
 355 }
 356
 357 /* These variables are required to pass information back and forth
 358    between after_open and check_needed.  */
 359
 360 static struct bfd_link_needed_list *global_needed;
 361 static bfd_boolean global_found;
 362
 363 /* This is called after all the input files have been opened.  */
 364
 365 static void
 366 gld${EMULATION_NAME}_after_open (void)
 367 {
 368   struct bfd_link_needed_list *needed, *l;
 369
 370   after_open_default ();
 371
 372   /* We only need to worry about this when doing a final link.  */
 373   if (link_info.relocatable || link_info.shared)
 374     return;
 375
 376   /* Get the list of files which appear in ld_need entries in dynamic
 377      objects included in the link.  For each such file, we want to
 378      track down the corresponding library, and include the symbol
 379      table in the link.  This is what the runtime dynamic linker will
 380      do.  Tracking the files down here permits one dynamic object to
 381      include another without requiring special action by the person
 382      doing the link.  Note that the needed list can actually grow
 383      while we are stepping through this loop.  */
 384   needed = bfd_sunos_get_needed_list (link_info.output_bfd, &link_info);
 385   for (l = needed; l != NULL; l = l->next)
 386     {
 387       struct bfd_link_needed_list *ll;
 388       const char *lname;
 389       search_dirs_type *search;
 390
 391       lname = l->name;
 392
 393       /* If we've already seen this file, skip it.  */
 394       for (ll = needed; ll != l; ll = ll->next)
 395         if (strcmp (ll->name, lname) == 0)
 396           break;
 397       if (ll != l)
 398         continue;
 399
 400       /* See if this file was included in the link explicitly.  */
 401       global_needed = l;
 402       global_found = FALSE;
 403       lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
 404       if (global_found)
 405         continue;
 406
 407       if (! CONST_STRNEQ (lname, "-l"))
 408         {
 409           bfd *abfd;
 410
 411           abfd = bfd_openr (lname, bfd_get_target (link_info.output_bfd));
 412           if (abfd != NULL)
 413             {
 414               if (! bfd_check_format (abfd, bfd_object))
 415                 {
 416                   (void) bfd_close (abfd);
 417                   abfd = NULL;
 418                 }
 419             }
 420           if (abfd != NULL)
 421             {
 422               if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
 423                 {
 424                   (void) bfd_close (abfd);
 425                   abfd = NULL;
 426                 }
 427             }
 428           if (abfd != NULL)
 429             {
 430               /* We've found the needed dynamic object.  */
 431               if (! bfd_link_add_symbols (abfd, &link_info))
 432                 einfo ("%F%B: could not read symbols: %E\n", abfd);
 433             }
 434           else
 435             {
 436               einfo ("%P: warning: %s, needed by %B, not found\n",
 437                      lname, l->by);
 438             }
 439
 440           continue;
 441         }
 442
 443       lname += 2;
 444
 445       /* We want to search for the file in the same way that the
 446          dynamic linker will search.  That means that we want to use
 447          rpath_link, rpath or -L, then the environment variable
 448          LD_LIBRARY_PATH (native only), then (if rpath was used) the
 449          linker script LIB_SEARCH_DIRS.  */
 450       if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link,
 451                                               lname))
 452         continue;
 453       if (command_line.rpath != NULL)
 454         {
 455           if (gld${EMULATION_NAME}_search_needed (command_line.rpath, lname))
 456             continue;
 457         }
 458       else
 459         {
 460           for (search = search_head; search != NULL; search = search->next)
 461             if (gld${EMULATION_NAME}_try_needed (search->name, lname))
 462               break;
 463           if (search != NULL)
 464             continue;
 465         }
 466 EOF
 467 if [ "x${host}" = "x${target}" ] ; then
 468   case " ${EMULATION_LIBPATH} " in
 469   *" ${EMULATION_NAME} "*)
 470 fragment <<EOF
 471       {
 472         const char *lib_path;
 473
 474         lib_path = (const char *) getenv ("LD_LIBRARY_PATH");
 475         if (gld${EMULATION_NAME}_search_needed (lib_path, lname))
 476           continue;
 477       }
 478 EOF
 479   ;;
 480   esac
 481 fi
 482 fragment <<EOF
 483       if (command_line.rpath != NULL)
 484         {
 485           for (search = search_head; search != NULL; search = search->next)
 486             {
 487               if (search->cmdline)
 488                 continue;
 489               if (gld${EMULATION_NAME}_try_needed (search->name, lname))
 490                 break;
 491             }
 492           if (search != NULL)
 493             continue;
 494         }
 495
 496       einfo ("%P: warning: %s, needed by %B, not found\n",
 497              l->name, l->by);
 498     }
 499 }
 500
 501 /* Search for a needed file in a path.  */
 502
 503 static bfd_boolean
 504 gld${EMULATION_NAME}_search_needed (const char *path, const char *name)
 505 {
 506   const char *s;
 507
 508   if (path == NULL || *path == '\0')
 509     return FALSE;
 510   while (1)
 511     {
 512       const char *dir;
 513       char *dircopy;
 514
 515       s = strchr (path, ':');
 516       if (s == NULL)
 517         {
 518           dircopy = NULL;
 519           dir = path;
 520         }
 521       else
 522         {
 523           dircopy = (char *) xmalloc (s - path + 1);
 524           memcpy (dircopy, path, s - path);
 525           dircopy[s - path] = '\0';
 526           dir = dircopy;
 527         }
 528
 529       if (gld${EMULATION_NAME}_try_needed (dir, name))
 530         return TRUE;
 531
 532       if (dircopy != NULL)
 533         free (dircopy);
 534
 535       if (s == NULL)
 536         break;
 537       path = s + 1;
 538     }
 539
 540   return FALSE;
 541 }
 542
 543 /* This function is called for each possible directory for a needed
 544    dynamic object.  */
 545
 546 static bfd_boolean
 547 gld${EMULATION_NAME}_try_needed (const char *dir, const char *name)
 548 {
 549   char *file;
 550   char *alc;
 551   bfd_boolean ignore;
 552   bfd *abfd;
 553
 554   file = gld${EMULATION_NAME}_search_dir (dir, name, &ignore);
 555   if (file == NULL)
 556     return FALSE;
 557
 558   alc = (char *) xmalloc (strlen (dir) + strlen (file) + 2);
 559   sprintf (alc, "%s/%s", dir, file);
 560   free (file);
 561   abfd = bfd_openr (alc, bfd_get_target (link_info.output_bfd));
 562   if (abfd == NULL)
 563     return FALSE;
 564   if (! bfd_check_format (abfd, bfd_object))
 565     {
 566       (void) bfd_close (abfd);
 567       return FALSE;
 568     }
 569   if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)
 570     {
 571       (void) bfd_close (abfd);
 572       return FALSE;
 573     }
 574
 575   /* We've found the needed dynamic object.  */
 576
 577   /* Add this file into the symbol table.  */
 578   if (! bfd_link_add_symbols (abfd, &link_info))
 579     einfo ("%F%B: could not read symbols: %E\n", abfd);
 580
 581   return TRUE;
 582 }
 583
 584 /* See if we have already included a needed object in the link.  This
 585    does not have to be precise, as it does no harm to include a
 586    dynamic object more than once.  */
 587
 588 static void
 589 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
 590 {
 591   if (s->filename == NULL)
 592     return;
 593   if (! CONST_STRNEQ (global_needed->name, "-l"))
 594     {
 595       if (strcmp (s->filename, global_needed->name) == 0)
 596         global_found = TRUE;
 597     }
 598   else
 599     {
 600       const char *sname, *lname;
 601       const char *sdot, *ldot;
 602       int lmaj, lmin, smaj, smin;
 603
 604       lname = global_needed->name + 2;
 605
 606       sname = strrchr (s->filename, '/');
 607       if (sname == NULL)
 608         sname = s->filename;
 609       else
 610         ++sname;
 611
 612       if (! CONST_STRNEQ (sname, "lib"))
 613         return;
 614       sname += 3;
 615
 616       ldot = strchr (lname, '.');
 617       if (ldot == NULL)
 618         ldot = lname + strlen (lname);
 619
 620       sdot = strstr (sname, ".so.");
 621       if (sdot == NULL)
 622         return;
 623
 624       if (sdot - sname != ldot - lname
 625           || strncmp (lname, sname, sdot - sname) != 0)
 626         return;
 627
 628       lmaj = lmin = -1;
 629       sscanf (ldot, ".%d.%d", &lmaj, &lmin);
 630       smaj = smin = -1;
 631       sscanf (sdot, ".so.%d.%d", &smaj, &smin);
 632       if ((smaj != lmaj && smaj != -1 && lmaj != -1)
 633           || (smin != lmin && smin != -1 && lmin != -1))
 634         return;
 635
 636       global_found = TRUE;
 637     }
 638 }
 639
 640 /* We need to use static variables to pass information around the call
 641    to lang_for_each_statement.  Ick.  */
 642
 643 static const char *find_assign;
 644 static bfd_boolean found_assign;
 645
 646 /* We need to use static variables to pass information around the call
 647    to lang_for_each_input_file.  Ick.  */
 648
 649 static bfd_size_type need_size;
 650 static bfd_size_type need_entries;
 651 static bfd_byte *need_contents;
 652 static bfd_byte *need_pinfo;
 653 static bfd_byte *need_pnames;
 654
 655 /* The size of one entry in the .need section, not including the file
 656    name.  */
 657
 658 #define NEED_ENTRY_SIZE (16)
 659
 660 /* This is called after the sections have been attached to output
 661    sections, but before any sizes or addresses have been set.  */
 662
 663 static void
 664 gld${EMULATION_NAME}_before_allocation (void)
 665 {
 666   struct bfd_link_hash_entry *hdyn = NULL;
 667   asection *sneed;
 668   asection *srules;
 669   asection *sdyn;
 670
 671   /* The SunOS native linker creates a shared library whenever there
 672      are any undefined symbols in a link, unless -e is used.  This is
 673      pretty weird, but we are compatible.  */
 674   if (! link_info.shared && ! link_info.relocatable && ! entry_from_cmdline)
 675     {
 676       struct bfd_link_hash_entry *h;
 677
 678       for (h = link_info.hash->undefs; h != NULL; h = h->u.undef.next)
 679         {
 680           if (h->type == bfd_link_hash_undefined
 681               && h->u.undef.abfd != NULL
 682               && (h->u.undef.abfd->flags & DYNAMIC) == 0
 683               && strcmp (h->root.string, "__DYNAMIC") != 0
 684               && strcmp (h->root.string, "__GLOBAL_OFFSET_TABLE_") != 0)
 685             {
 686               find_assign = h->root.string;
 687               found_assign = FALSE;
 688               lang_for_each_statement (gld${EMULATION_NAME}_find_assignment);
 689               if (! found_assign)
 690                 {
 691                   link_info.shared = TRUE;
 692                   break;
 693                 }
 694             }
 695         }
 696     }
 697
 698   if (link_info.shared)
 699     {
 700       lang_output_section_statement_type *os;
 701
 702       /* Set the .text section to start at 0x20, not 0x2020.  FIXME:
 703          This is too magical.  */
 704       os = lang_output_section_statement_lookup (".text", 0, TRUE);
 705       if (os->addr_tree == NULL)
 706         os->addr_tree = exp_intop (0x20);
 707     }
 708
 709   /* We need to create a __DYNAMIC symbol.  We don't do this in the
 710      linker script because we want to set the value to the start of
 711      the dynamic section if there is one, or to zero if there isn't
 712      one.  We need to create the symbol before calling
 713      size_dynamic_sections, although we can't set the value until
 714      afterward.  */
 715   if (! link_info.relocatable)
 716     {
 717       hdyn = bfd_link_hash_lookup (link_info.hash, "__DYNAMIC", TRUE, FALSE,
 718                                    FALSE);
 719       if (hdyn == NULL)
 720         einfo ("%P%F: bfd_link_hash_lookup: %E\n");
 721       if (! bfd_sunos_record_link_assignment (link_info.output_bfd, &link_info,
 722                                               "__DYNAMIC"))
 723         einfo ("%P%F: failed to record assignment to __DYNAMIC: %E\n");
 724     }
 725
 726   /* If we are going to make any variable assignments, we need to let
 727      the backend linker know about them in case the variables are
 728      referred to by dynamic objects.  */
 729   lang_for_each_statement (gld${EMULATION_NAME}_find_assignment);
 730
 731   /* Let the backend linker work out the sizes of any sections
 732      required by dynamic linking.  */
 733   if (! bfd_sunos_size_dynamic_sections (link_info.output_bfd, &link_info,
 734                                          &sdyn, &sneed, &srules))
 735     einfo ("%P%F: failed to set dynamic section sizes: %E\n");
 736
 737   if (sneed != NULL)
 738     {
 739       /* Set up the .need section.  See the description of the ld_need
 740          field in include/aout/sun4.h.  */
 741
 742       need_entries = 0;
 743       need_size = 0;
 744
 745       lang_for_each_input_file (gld${EMULATION_NAME}_count_need);
 746
 747       /* We should only have a .need section if we have at least one
 748          dynamic object.  */
 749       ASSERT (need_entries != 0);
 750
 751       sneed->size = need_size;
 752       sneed->contents = (bfd_byte *) xmalloc (need_size);
 753
 754       need_contents = sneed->contents;
 755       need_pinfo = sneed->contents;
 756       need_pnames = sneed->contents + need_entries * 16;
 757
 758       lang_for_each_input_file (gld${EMULATION_NAME}_set_need);
 759
 760       ASSERT ((bfd_size_type) (need_pnames - sneed->contents) == need_size);
 761     }
 762
 763   if (srules != NULL)
 764     {
 765       /* Set up the .rules section.  This is just a PATH like string
 766          of the -L arguments given on the command line.  We permit the
 767          user to specify the directories using the -rpath command line
 768          option.  */
 769       if (command_line.rpath)
 770         {
 771           srules->size = strlen (command_line.rpath);
 772           srules->contents = (bfd_byte *) command_line.rpath;
 773         }
 774       else
 775         {
 776           unsigned int size;
 777           search_dirs_type *search;
 778
 779           size = 0;
 780           for (search = search_head; search != NULL; search = search->next)
 781             if (search->cmdline)
 782               size += strlen (search->name) + 1;
 783           srules->size = size;
 784           if (size > 0)
 785             {
 786               char *p;
 787
 788               srules->contents = (bfd_byte *) xmalloc (size);
 789               p = (char *) srules->contents;
 790               *p = '\0';
 791               for (search = search_head; search != NULL; search = search->next)
 792                 {
 793                   if (search->cmdline)
 794                     {
 795                       if (p != (char *) srules->contents)
 796                         *p++ = ':';
 797                       strcpy (p, search->name);
 798                       p += strlen (p);
 799                     }
 800                 }
 801             }
 802         }
 803     }
 804
 805   /* We must assign a value to __DYNAMIC.  It should be zero if we are
 806      not doing a dynamic link, or the start of the .dynamic section if
 807      we are doing one.  */
 808   if (! link_info.relocatable)
 809     {
 810       hdyn->type = bfd_link_hash_defined;
 811       hdyn->u.def.value = 0;
 812       if (sdyn != NULL)
 813         hdyn->u.def.section = sdyn;
 814       else
 815         hdyn->u.def.section = bfd_abs_section_ptr;
 816     }
 817
 818   before_allocation_default ();
 819 }
 820
 821 /* This is called by the before_allocation routine via
 822    lang_for_each_statement.  It does one of two things: if the
 823    variable find_assign is set, it sets found_assign if it finds an
 824    assignment to that variable; otherwise it tells the backend linker
 825    about all assignment statements, in case they are assignments to
 826    symbols which are referred to by dynamic objects.  */
 827
 828 static void
 829 gld${EMULATION_NAME}_find_assignment (lang_statement_union_type *s)
 830 {
 831   if (s->header.type == lang_assignment_statement_enum
 832       && (find_assign == NULL || ! found_assign))
 833     gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
 834 }
 835
 836 /* Look through an expression for an assignment statement.  */
 837
 838 static void
 839 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
 840 {
 841   switch (exp->type.node_class)
 842     {
 843     case etree_assign:
 844       if (find_assign != NULL)
 845         {
 846           if (strcmp (find_assign, exp->assign.dst) == 0)
 847             found_assign = TRUE;
 848           return;
 849         }
 850
 851       if (strcmp (exp->assign.dst, ".") != 0)
 852         {
 853           if (! bfd_sunos_record_link_assignment (link_info.output_bfd,
 854                                                   &link_info,
 855                                                   exp->assign.dst))
 856             einfo ("%P%F: failed to record assignment to %s: %E\n",
 857                    exp->assign.dst);
 858         }
 859       gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
 860       break;
 861
 862     case etree_binary:
 863       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
 864       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
 865       break;
 866
 867     case etree_trinary:
 868       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
 869       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
 870       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
 871       break;
 872
 873     case etree_unary:
 874       gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
 875       break;
 876
 877     default:
 878       break;
 879     }
 880 }
 881
 882 /* Work out the size of the .need section, and the number of entries.
 883    The backend will set the ld_need field of the dynamic linking
 884    information to point to the .need section.  See include/aout/sun4.h
 885    for more information.  */
 886
 887 static void
 888 gld${EMULATION_NAME}_count_need (lang_input_statement_type *inp)
 889 {
 890   if (inp->the_bfd != NULL
 891       && (inp->the_bfd->flags & DYNAMIC) != 0)
 892     {
 893       ++need_entries;
 894       need_size += NEED_ENTRY_SIZE;
 895       if (! inp->flags.maybe_archive)
 896         need_size += strlen (inp->filename) + 1;
 897       else
 898         {
 899           ASSERT (inp->local_sym_name[0] == '-'
 900                   && inp->local_sym_name[1] == 'l');
 901           need_size += strlen (inp->local_sym_name + 2) + 1;
 902         }
 903     }
 904 }
 905
 906 /* Fill in the contents of the .need section.  */
 907
 908 static void
 909 gld${EMULATION_NAME}_set_need (lang_input_statement_type *inp)
 910 {
 911   if (inp->the_bfd != NULL
 912       && (inp->the_bfd->flags & DYNAMIC) != 0)
 913     {
 914       bfd_size_type c;
 915
 916       /* To really fill in the .need section contents, we need to know
 917          the final file position of the section, but we don't.
 918          Instead, we use offsets, and rely on the BFD backend to
 919          finish the section up correctly.  FIXME: Talk about lack of
 920          referential locality.  */
 921       bfd_put_32 (link_info.output_bfd, need_pnames - need_contents,
 922                   need_pinfo);
 923       if (! inp->flags.maybe_archive)
 924         {
 925           bfd_put_32 (link_info.output_bfd, (bfd_vma) 0, need_pinfo + 4);
 926           bfd_put_16 (link_info.output_bfd, (bfd_vma) 0, need_pinfo + 8);
 927           bfd_put_16 (link_info.output_bfd, (bfd_vma) 0, need_pinfo + 10);
 928           strcpy ((char *) need_pnames, inp->filename);
 929         }
 930       else
 931         {
 932           char *verstr;
 933           int maj, min;
 934
 935           bfd_put_32 (link_info.output_bfd, (bfd_vma) 0x80000000,
 936                       need_pinfo + 4);
 937           maj = 0;
 938           min = 0;
 939           verstr = strstr (inp->filename, ".so.");
 940           if (verstr != NULL)
 941             sscanf (verstr, ".so.%d.%d", &maj, &min);
 942           bfd_put_16 (link_info.output_bfd, (bfd_vma) maj, need_pinfo + 8);
 943           bfd_put_16 (link_info.output_bfd, (bfd_vma) min, need_pinfo + 10);
 944           strcpy ((char *) need_pnames, inp->local_sym_name + 2);
 945         }
 946
 947       c = (need_pinfo - need_contents) / NEED_ENTRY_SIZE;
 948       if (c + 1 >= need_entries)
 949         bfd_put_32 (link_info.output_bfd, (bfd_vma) 0, need_pinfo + 12);
 950       else
 951         bfd_put_32 (link_info.output_bfd, (bfd_vma) (c + 1) * NEED_ENTRY_SIZE,
 952                     need_pinfo + 12);
 953
 954       need_pinfo += NEED_ENTRY_SIZE;
 955       need_pnames += strlen ((char *) need_pnames) + 1;
 956     }
 957 }
 958
 959 static char *
 960 gld${EMULATION_NAME}_get_script (int *isfile)
 961 EOF
 962
 963 if test -n "$COMPILE_IN"
 964 then
 965 # Scripts compiled in.
 966
 967 # sed commands to quote an ld script as a C string.
 968 sc="-f stringify.sed"
 969
 970 fragment <<EOF
 971 {
 972   *isfile = 0;
 973
 974   if (link_info.relocatable && config.build_constructors)
 975     return
 976 EOF
 977 sed $sc ldscripts/${EMULATION_NAME}.xu                     >> e${EMULATION_NAME}.c
 978 echo '  ; else if (link_info.relocatable) return'         >> e${EMULATION_NAME}.c
 979 sed $sc ldscripts/${EMULATION_NAME}.xr                     >> e${EMULATION_NAME}.c
 980 echo '  ; else if (!config.text_read_only) return'         >> e${EMULATION_NAME}.c
 981 sed $sc ldscripts/${EMULATION_NAME}.xbn                    >> e${EMULATION_NAME}.c
 982 echo '  ; else if (!config.magic_demand_paged) return'     >> e${EMULATION_NAME}.c
 983 sed $sc ldscripts/${EMULATION_NAME}.xn                     >> e${EMULATION_NAME}.c
 984 echo '  ; else return'                                     >> e${EMULATION_NAME}.c
 985 sed $sc ldscripts/${EMULATION_NAME}.x                      >> e${EMULATION_NAME}.c
 986 echo '; }'                                                 >> e${EMULATION_NAME}.c
 987
 988 else
 989 # Scripts read from the filesystem.
 990
 991 fragment <<EOF
 992 {
 993   *isfile = 1;
 994
 995   if (link_info.relocatable && config.build_constructors)
 996     return "ldscripts/${EMULATION_NAME}.xu";
 997   else if (link_info.relocatable)
 998     return "ldscripts/${EMULATION_NAME}.xr";
 999   else if (!config.text_read_only)
1000     return "ldscripts/${EMULATION_NAME}.xbn";
1001   else if (!config.magic_demand_paged)
1002     return "ldscripts/${EMULATION_NAME}.xn";
1003   else
1004     return "ldscripts/${EMULATION_NAME}.x";
1005 }
1006 EOF
1007
1008 fi
1009
1010 fragment <<EOF
1011
1012 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
1013 {
1014   gld${EMULATION_NAME}_before_parse,
1015   syslib_default,
1016   hll_default,
1017   after_parse_default,
1018   gld${EMULATION_NAME}_after_open,
1019   after_allocation_default,
1020   set_output_arch_default,
1021   ldemul_default_target,
1022   gld${EMULATION_NAME}_before_allocation,
1023   gld${EMULATION_NAME}_get_script,
1024   "${EMULATION_NAME}",
1025   "${OUTPUT_FORMAT}",
1026   finish_default,
1027   gld${EMULATION_NAME}_create_output_section_statements,
1028   NULL, /* open dynamic archive */
1029   NULL, /* place orphan */
1030   gld${EMULATION_NAME}_set_symbols,
1031   NULL, /* parse args */
1032   NULL, /* add_options */
1033   NULL, /* handle_option */
1034   NULL, /* unrecognized file */
1035   NULL, /* list options */
1036   NULL, /* recognized file */
1037   NULL, /* find_potential_libraries */
1038   NULL  /* new_vers_pattern */
1039 };
1040 EOF