bfd/sparclinux.c

   1 /* BFD back-end for linux flavored sparc a.out binaries.
   2    Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 1999
   3    Free Software Foundation, Inc.
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  20 USA.  */
  21
  22 #define TARGET_PAGE_SIZE        4096
  23 #define ZMAGIC_DISK_BLOCK_SIZE 1024
  24 #define SEGMENT_SIZE TARGET_PAGE_SIZE
  25 #define TEXT_START_ADDR        0x0
  26 #define N_SHARED_LIB(x) 0
  27 #define BYTES_IN_WORD 4
  28
  29 #define MACHTYPE_OK(mtype) ((mtype) == M_SPARC || (mtype) == M_UNKNOWN)
  30
  31 #include "bfd.h"
  32 #include "sysdep.h"
  33 #include "libbfd.h"
  34 #include "aout/aout64.h"
  35 #include "aout/stab_gnu.h"
  36 #include "aout/ar.h"
  37 #include "libaout.h"           /* BFD a.out internal data structures */
  38
  39 #define DEFAULT_ARCH bfd_arch_sparc
  40 #define MY(OP) CAT(sparclinux_,OP)
  41 #define TARGETNAME "a.out-sparc-linux"
  42
  43 extern const bfd_target MY(vec);
  44
  45 /* We always generate QMAGIC files in preference to ZMAGIC files.  It
  46    would be possible to make this a linker option, if that ever
  47    becomes important.  */
  48
  49 static void MY_final_link_callback
  50   PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
  51
  52 static boolean sparclinux_bfd_final_link
  53   PARAMS ((bfd *abfd, struct bfd_link_info *info));
  54
  55 static boolean
  56 sparclinux_bfd_final_link (abfd, info)
  57      bfd *abfd;
  58      struct bfd_link_info *info;
  59 {
  60   obj_aout_subformat (abfd) = q_magic_format;
  61   return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
  62 }
  63
  64 #define MY_bfd_final_link sparclinux_bfd_final_link
  65
  66 /* Set the machine type correctly.  */
  67
  68 static boolean sparclinux_write_object_contents PARAMS ((bfd *abfd));
  69
  70 static boolean
  71 sparclinux_write_object_contents (abfd)
  72      bfd *abfd;
  73 {
  74   struct external_exec exec_bytes;
  75   struct internal_exec *execp = exec_hdr (abfd);
  76
  77   N_SET_MACHTYPE (*execp, M_SPARC);
  78
  79   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
  80
  81   WRITE_HEADERS(abfd, execp);
  82
  83   return true;
  84 }
  85
  86 #define MY_write_object_contents sparclinux_write_object_contents
  87 /* Code to link against Linux a.out shared libraries.  */
  88
  89 /* See if a symbol name is a reference to the global offset table.  */
  90
  91 #ifndef GOT_REF_PREFIX
  92 #define        GOT_REF_PREFIX  "__GOT_"
  93 #endif
  94
  95 #define IS_GOT_SYM(name) \
  96   (strncmp (name, GOT_REF_PREFIX, sizeof GOT_REF_PREFIX - 1) == 0)
  97
  98 /* See if a symbol name is a reference to the procedure linkage table. */
  99
 100 #ifndef PLT_REF_PREFIX
 101 #define        PLT_REF_PREFIX  "__PLT_"
 102 #endif
 103
 104 #define IS_PLT_SYM(name) \
 105   (strncmp (name, PLT_REF_PREFIX, sizeof PLT_REF_PREFIX - 1) == 0)
 106
 107 /* This string is used to generate specialized error messages.  */
 108
 109 #ifndef NEEDS_SHRLIB
 110 #define NEEDS_SHRLIB "__NEEDS_SHRLIB_"
 111 #endif
 112
 113 /* This special symbol is a set vector that contains a list of
 114    pointers to fixup tables.  It will be present in any dynamicly
 115    linked file.  The linker generated fixup table should also be added
 116    to the list, and it should always appear in the second slot (the
 117    first one is a dummy with a magic number that is defined in
 118    crt0.o).  */
 119
 120 #ifndef SHARABLE_CONFLICTS
 121 #define SHARABLE_CONFLICTS "__SHARABLE_CONFLICTS__"
 122 #endif
 123
 124 /* We keep a list of fixups.  The terminology is a bit strange, but
 125    each fixup contains two 32 bit numbers.  A regular fixup contains
 126    an address and a pointer, and at runtime we should store the
 127    address at the location pointed to by the pointer.  A builtin fixup
 128    contains two pointers, and we should read the address using one
 129    pointer and store it at the location pointed to by the other
 130    pointer.  Builtin fixups come into play when we have duplicate
 131    __GOT__ symbols for the same variable.  The builtin fixup will copy
 132    the GOT pointer from one over into the other.  */
 133
 134 struct fixup
 135 {
 136   struct fixup *next;
 137   struct linux_link_hash_entry *h;
 138   bfd_vma value;
 139
 140   /* Nonzero if this is a jump instruction that needs to be fixed,
 141      zero if this is just a pointer */
 142   char jump;
 143
 144   char builtin;
 145 };
 146
 147 /* We don't need a special hash table entry structure, but we do need
 148    to keep some information between linker passes, so we use a special
 149    hash table.  */
 150
 151 struct linux_link_hash_entry
 152 {
 153   struct aout_link_hash_entry root;
 154 };
 155
 156 struct linux_link_hash_table
 157 {
 158   struct aout_link_hash_table root;
 159
 160   /* First dynamic object found in link.  */
 161   bfd *dynobj;
 162
 163   /* Number of fixups.  */
 164   size_t fixup_count;
 165
 166   /* Number of builtin fixups.  */
 167   size_t local_builtins;
 168
 169   /* List of fixups.  */
 170   struct fixup *fixup_list;
 171 };
 172
 173 static struct bfd_hash_entry *linux_link_hash_newfunc
 174   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 175 static struct bfd_link_hash_table *linux_link_hash_table_create
 176   PARAMS ((bfd *));
 177 static struct fixup *new_fixup
 178   PARAMS ((struct bfd_link_info *, struct linux_link_hash_entry *,
 179           bfd_vma, int));
 180 static boolean linux_link_create_dynamic_sections
 181   PARAMS ((bfd *, struct bfd_link_info *));
 182 static boolean linux_add_one_symbol
 183   PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *,
 184           bfd_vma, const char *, boolean, boolean,
 185           struct bfd_link_hash_entry **));
 186 static boolean linux_tally_symbols
 187   PARAMS ((struct linux_link_hash_entry *, PTR));
 188 static boolean linux_finish_dynamic_link
 189   PARAMS ((bfd *, struct bfd_link_info *));
 190
 191 /* Routine to create an entry in an Linux link hash table.  */
 192
 193 static struct bfd_hash_entry *
 194 linux_link_hash_newfunc (entry, table, string)
 195      struct bfd_hash_entry *entry;
 196      struct bfd_hash_table *table;
 197      const char *string;
 198 {
 199   struct linux_link_hash_entry *ret = (struct linux_link_hash_entry *) entry;
 200
 201   /* Allocate the structure if it has not already been allocated by a
 202      subclass.  */
 203   if (ret == (struct linux_link_hash_entry *) NULL)
 204     ret = ((struct linux_link_hash_entry *)
 205           bfd_hash_allocate (table, sizeof (struct linux_link_hash_entry)));
 206   if (ret == NULL)
 207     return (struct bfd_hash_entry *) ret;
 208
 209   /* Call the allocation method of the superclass.  */
 210   ret = ((struct linux_link_hash_entry *)
 211         NAME(aout,link_hash_newfunc) ((struct bfd_hash_entry *) ret,
 212                                       table, string));
 213   if (ret != NULL)
 214     {
 215       /* Set local fields; there aren't any.  */
 216     }
 217
 218   return (struct bfd_hash_entry *) ret;
 219 }
 220
 221 /* Create a Linux link hash table.  */
 222
 223 static struct bfd_link_hash_table *
 224 linux_link_hash_table_create (abfd)
 225      bfd *abfd;
 226 {
 227   struct linux_link_hash_table *ret;
 228
 229   ret = ((struct linux_link_hash_table *)
 230         bfd_alloc (abfd, sizeof (struct linux_link_hash_table)));
 231   if (ret == (struct linux_link_hash_table *) NULL)
 232     return (struct bfd_link_hash_table *) NULL;
 233   if (! NAME(aout,link_hash_table_init) (&ret->root, abfd,
 234                                         linux_link_hash_newfunc))
 235     {
 236       free (ret);
 237       return (struct bfd_link_hash_table *) NULL;
 238     }
 239
 240   ret->dynobj = NULL;
 241   ret->fixup_count = 0;
 242   ret->local_builtins = 0;
 243   ret->fixup_list = NULL;
 244
 245   return &ret->root.root;
 246 }
 247
 248 /* Look up an entry in a Linux link hash table.  */
 249
 250 #define linux_link_hash_lookup(table, string, create, copy, follow) \
 251   ((struct linux_link_hash_entry *) \
 252    aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\
 253                          (follow)))
 254
 255 /* Traverse a Linux link hash table.  */
 256
 257 #define linux_link_hash_traverse(table, func, info)                    \
 258   (aout_link_hash_traverse                                             \
 259    (&(table)->root,                                                    \
 260     (boolean (*) PARAMS ((struct aout_link_hash_entry *, PTR))) (func), \
 261     (info)))
 262
 263 /* Get the Linux link hash table from the info structure.  This is
 264    just a cast.  */
 265
 266 #define linux_hash_table(p) ((struct linux_link_hash_table *) ((p)->hash))
 267
 268 /* Store the information for a new fixup.  */
 269
 270 static struct fixup *
 271 new_fixup (info, h, value, builtin)
 272      struct bfd_link_info *info;
 273      struct linux_link_hash_entry *h;
 274      bfd_vma value;
 275      int builtin;
 276 {
 277   struct fixup *f;
 278
 279   f = (struct fixup *) bfd_hash_allocate (&info->hash->table,
 280                                          sizeof (struct fixup));
 281   if (f == NULL)
 282     return f;
 283   f->next = linux_hash_table (info)->fixup_list;
 284   linux_hash_table (info)->fixup_list = f;
 285   f->h = h;
 286   f->value = value;
 287   f->builtin = builtin;
 288   f->jump = 0;
 289   ++linux_hash_table (info)->fixup_count;
 290   return f;
 291 }
 292
 293 /* We come here once we realize that we are going to link to a shared
 294    library.  We need to create a special section that contains the
 295    fixup table, and we ultimately need to add a pointer to this into
 296    the set vector for SHARABLE_CONFLICTS.  At this point we do not
 297    know the size of the section, but that's OK - we just need to
 298    create it for now.  */
 299
 300 static boolean
 301 linux_link_create_dynamic_sections (abfd, info)
 302      bfd *abfd;
 303      struct bfd_link_info *info ATTRIBUTE_UNUSED;
 304 {
 305   flagword flags;
 306   register asection *s;
 307
 308   /* Note that we set the SEC_IN_MEMORY flag.  */
 309   flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
 310
 311   /* We choose to use the name ".linux-dynamic" for the fixup table.
 312      Why not? */
 313   s = bfd_make_section (abfd, ".linux-dynamic");
 314   if (s == NULL
 315       || ! bfd_set_section_flags (abfd, s, flags)
 316       || ! bfd_set_section_alignment (abfd, s, 2))
 317     return false;
 318   s->_raw_size = 0;
 319   s->contents = 0;
 320
 321   return true;
 322 }
 323
 324 /* Function to add a single symbol to the linker hash table.  This is
 325    a wrapper around _bfd_generic_link_add_one_symbol which handles the
 326    tweaking needed for dynamic linking support.  */
 327
 328 static boolean
 329 linux_add_one_symbol (info, abfd, name, flags, section, value, string,
 330                      copy, collect, hashp)
 331      struct bfd_link_info *info;
 332      bfd *abfd;
 333      const char *name;
 334      flagword flags;
 335      asection *section;
 336      bfd_vma value;
 337      const char *string;
 338      boolean copy;
 339      boolean collect;
 340      struct bfd_link_hash_entry **hashp;
 341 {
 342   struct linux_link_hash_entry *h;
 343   boolean insert;
 344
 345   /* Look up and see if we already have this symbol in the hash table.
 346      If we do, and the defining entry is from a shared library, we
 347      need to create the dynamic sections.
 348
 349      FIXME: What if abfd->xvec != info->hash->creator?  We may want to
 350      be able to link Linux a.out and ELF objects together, but serious
 351      confusion is possible.  */
 352
 353   insert = false;
 354
 355   if (! info->relocateable
 356       && linux_hash_table (info)->dynobj == NULL
 357       && strcmp (name, SHARABLE_CONFLICTS) == 0
 358       && (flags & BSF_CONSTRUCTOR) != 0
 359       && abfd->xvec == info->hash->creator)
 360     {
 361       if (! linux_link_create_dynamic_sections (abfd, info))
 362        return false;
 363       linux_hash_table (info)->dynobj = abfd;
 364       insert = true;
 365     }
 366
 367   if (bfd_is_abs_section (section)
 368       && abfd->xvec == info->hash->creator)
 369     {
 370       h = linux_link_hash_lookup (linux_hash_table (info), name, false,
 371                                  false, false);
 372       if (h != NULL
 373          && (h->root.root.type == bfd_link_hash_defined
 374              || h->root.root.type == bfd_link_hash_defweak))
 375        {
 376          struct fixup *f;
 377
 378          if (hashp != NULL)
 379            *hashp = (struct bfd_link_hash_entry *) h;
 380
 381          f = new_fixup (info, h, value, ! IS_PLT_SYM (name));
 382          if (f == NULL)
 383            return false;
 384          f->jump = IS_PLT_SYM (name);
 385
 386          return true;
 387        }
 388     }
 389
 390   /* Do the usual procedure for adding a symbol.  */
 391   if (! _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
 392                                          value, string, copy, collect,
 393                                          hashp))
 394     return false;
 395
 396   /* Insert a pointer to our table in the set vector.  The dynamic
 397      linker requires this information */
 398   if (insert)
 399     {
 400       asection *s;
 401
 402       /* Here we do our special thing to add the pointer to the
 403         dynamic section in the SHARABLE_CONFLICTS set vector.  */
 404       s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 405                                   ".linux-dynamic");
 406       BFD_ASSERT (s != NULL);
 407
 408       if (! (_bfd_generic_link_add_one_symbol
 409             (info, linux_hash_table (info)->dynobj, SHARABLE_CONFLICTS,
 410              BSF_GLOBAL | BSF_CONSTRUCTOR, s, 0, NULL, false, false, NULL)))
 411        return false;
 412     }
 413
 414   return true;
 415 }
 416
 417 /* We will crawl the hash table and come here for every global symbol.
 418    We will examine each entry and see if there are indications that we
 419    need to add a fixup.  There are two possible cases - one is where
 420    you have duplicate definitions of PLT or GOT symbols - these will
 421    have already been caught and added as "builtin" fixups.  If we find
 422    that the corresponding non PLT/GOT symbol is also present, we
 423    convert it to a regular fixup instead.
 424
 425    This function is called via linux_link_hash_traverse.  */
 426
 427 static boolean
 428 linux_tally_symbols (h, data)
 429      struct linux_link_hash_entry *h;
 430      PTR data;
 431 {
 432   struct bfd_link_info *info = (struct bfd_link_info *) data;
 433   struct fixup *f, *f1;
 434   int is_plt;
 435   struct linux_link_hash_entry *h1, *h2;
 436   boolean exists;
 437
 438   if (h->root.root.type == bfd_link_hash_undefined
 439       && strncmp (h->root.root.root.string, NEEDS_SHRLIB,
 440                  sizeof NEEDS_SHRLIB - 1) == 0)
 441     {
 442       const char *name;
 443       char *p;
 444       char *alloc = NULL;
 445
 446       name = h->root.root.root.string + sizeof NEEDS_SHRLIB - 1;
 447       p = strrchr (name, '_');
 448       if (p != NULL)
 449        alloc = (char *) bfd_malloc (strlen (name) + 1);
 450
 451       if (p == NULL || alloc == NULL)
 452        (*_bfd_error_handler) (_("Output file requires shared library `%s'\n"),
 453                               name);
 454       else
 455        {
 456          strcpy (alloc, name);
 457          p = strrchr (alloc, '_');
 458          *p++ = '\0';
 459          (*_bfd_error_handler)
 460            (_("Output file requires shared library `%s.so.%s'\n"),
 461             alloc, p);
 462          free (alloc);
 463        }
 464
 465       abort ();
 466     }
 467
 468   /* If this symbol is not a PLT/GOT, we do not even need to look at
 469      it.  */
 470   is_plt = IS_PLT_SYM (h->root.root.root.string);
 471
 472   if (is_plt || IS_GOT_SYM (h->root.root.root.string))
 473     {
 474       /* Look up this symbol twice.  Once just as a regular lookup,
 475         and then again following all of the indirect links until we
 476         reach a real symbol.  */
 477       h1 = linux_link_hash_lookup (linux_hash_table (info),
 478                                   (h->root.root.root.string
 479                                    + sizeof PLT_REF_PREFIX - 1),
 480                                   false, false, true);
 481       /* h2 does not follow indirect symbols. */
 482       h2 = linux_link_hash_lookup (linux_hash_table (info),
 483                                   (h->root.root.root.string
 484                                    + sizeof PLT_REF_PREFIX - 1),
 485                                   false, false, false);
 486
 487       /* The real symbol must exist but if it is also an ABS symbol,
 488         there is no need to have a fixup.  This is because they both
 489         came from the same library.  If on the other hand, we had to
 490         use an indirect symbol to get to the real symbol, we add the
 491         fixup anyway, since there are cases where these symbols come
 492         from different shared libraries */
 493       if (h1 != NULL
 494          && (((h1->root.root.type == bfd_link_hash_defined
 495                || h1->root.root.type == bfd_link_hash_defweak)
 496               && ! bfd_is_abs_section (h1->root.root.u.def.section))
 497              || h2->root.root.type == bfd_link_hash_indirect))
 498        {
 499          /* See if there is a "builtin" fixup already present
 500             involving this symbol.  If so, convert it to a regular
 501             fixup.  In the end, this relaxes some of the requirements
 502             about the order of performing fixups.  */
 503          exists = false;
 504          for (f1 = linux_hash_table (info)->fixup_list;
 505               f1 != NULL;
 506               f1 = f1->next)
 507            {
 508              if ((f1->h != h && f1->h != h1)
 509                  || (! f1->builtin && ! f1->jump))
 510                continue;
 511              if (f1->h == h1)
 512               exists = true;
 513              if (! exists
 514                  && bfd_is_abs_section (h->root.root.u.def.section))
 515                {
 516                  f = new_fixup (info, h1, f1->h->root.root.u.def.value, 0);
 517                  f->jump = is_plt;
 518                }
 519              f1->h = h1;
 520              f1->jump = is_plt;
 521              f1->builtin = 0;
 522              exists = true;
 523            }
 524          if (! exists
 525              && bfd_is_abs_section (h->root.root.u.def.section))
 526            {
 527              f = new_fixup (info, h1, h->root.root.u.def.value, 0);
 528              if (f == NULL)
 529                {
 530                  /* FIXME: No way to return error.  */
 531                  abort ();
 532                }
 533              f->jump = is_plt;
 534            }
 535        }
 536
 537       /* Quick and dirty way of stripping these symbols from the
 538         symtab. */
 539       if (bfd_is_abs_section (h->root.root.u.def.section))
 540        h->root.written = true;
 541     }
 542
 543   return true;
 544 }
 545
 546 /* This is called to set the size of the .linux-dynamic section is.
 547    It is called by the Linux linker emulation before_allocation
 548    routine.  We have finished reading all of the input files, and now
 549    we just scan the hash tables to find out how many additional fixups
 550    are required.  */
 551
 552 boolean
 553 bfd_sparclinux_size_dynamic_sections (output_bfd, info)
 554      bfd *output_bfd;
 555      struct bfd_link_info *info;
 556 {
 557   struct fixup *f;
 558   asection *s;
 559
 560   if (output_bfd->xvec != &MY(vec))
 561     return true;
 562
 563   /* First find the fixups... */
 564   linux_link_hash_traverse (linux_hash_table (info),
 565                            linux_tally_symbols,
 566                            (PTR) info);
 567
 568   /* If there are builtin fixups, leave room for a marker.  This is
 569      used by the dynamic linker so that it knows that all that follow
 570      are builtin fixups instead of regular fixups.  */
 571   for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 572     {
 573       if (f->builtin)
 574        {
 575          ++linux_hash_table (info)->fixup_count;
 576          ++linux_hash_table (info)->local_builtins;
 577          break;
 578        }
 579     }
 580
 581   if (linux_hash_table (info)->dynobj == NULL)
 582     {
 583       if (linux_hash_table (info)->fixup_count > 0)
 584       abort ();
 585       return true;
 586     }
 587
 588   /* Allocate memory for our fixup table.  We will fill it in later.  */
 589   s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 590                               ".linux-dynamic");
 591   if (s != NULL)
 592     {
 593       s->_raw_size = 8 + linux_hash_table (info)->fixup_count * 8;
 594       s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
 595       if (s->contents == NULL)
 596        return false;
 597       memset (s->contents, 0, (size_t) s->_raw_size);
 598     }
 599
 600   return true;
 601 }
 602
 603 /* We come here once we are ready to actually write the fixup table to
 604    the output file.  Scan the fixup tables and so forth and generate
 605    the stuff we need.  */
 606
 607 static boolean
 608 linux_finish_dynamic_link (output_bfd, info)
 609      bfd *output_bfd;
 610      struct bfd_link_info *info;
 611 {
 612   asection *s, *os, *is;
 613   bfd_byte *fixup_table;
 614   struct linux_link_hash_entry *h;
 615   struct fixup *f;
 616   unsigned int new_addr;
 617   int section_offset;
 618   unsigned int fixups_written;
 619
 620   if (linux_hash_table (info)->dynobj == NULL)
 621     return true;
 622
 623   s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 624                               ".linux-dynamic");
 625   BFD_ASSERT (s != NULL);
 626   os = s->output_section;
 627   fixups_written = 0;
 628
 629 #ifdef LINUX_LINK_DEBUG
 630   printf ("Fixup table file offset: %x  VMA: %x\n",
 631          os->filepos + s->output_offset,
 632          os->vma + s->output_offset);
 633 #endif
 634
 635   fixup_table = s->contents;
 636   bfd_put_32 (output_bfd, linux_hash_table (info)->fixup_count, fixup_table);
 637   fixup_table += 4;
 638
 639   /* Fill in fixup table.  */
 640   for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 641     {
 642       if (f->builtin)
 643        continue;
 644
 645       if (f->h->root.root.type != bfd_link_hash_defined
 646          && f->h->root.root.type != bfd_link_hash_defweak)
 647        {
 648          (*_bfd_error_handler)
 649            (_("Symbol %s not defined for fixups\n"),
 650             f->h->root.root.root.string);
 651          continue;
 652        }
 653
 654       is = f->h->root.root.u.def.section;
 655       section_offset = is->output_section->vma + is->output_offset;
 656       new_addr = f->h->root.root.u.def.value + section_offset;
 657
 658 #ifdef LINUX_LINK_DEBUG
 659       printf ("Fixup(%d) %s: %x %x\n",f->jump, f->h->root.root.string,
 660              new_addr, f->value);
 661 #endif
 662
 663       if (f->jump)
 664        {
 665          /* Relative address */
 666          new_addr = new_addr - (f->value + 5);
 667          bfd_put_32 (output_bfd, new_addr, fixup_table);
 668          fixup_table += 4;
 669          bfd_put_32 (output_bfd, f->value + 1, fixup_table);
 670          fixup_table += 4;
 671        }
 672       else
 673        {
 674          bfd_put_32 (output_bfd, new_addr, fixup_table);
 675          fixup_table += 4;
 676          bfd_put_32 (output_bfd, f->value, fixup_table);
 677          fixup_table += 4;
 678        }
 679       ++fixups_written;
 680     }
 681
 682   if (linux_hash_table (info)->local_builtins != 0)
 683     {
 684       /* Special marker so we know to switch to the other type of fixup */
 685       bfd_put_32 (output_bfd, 0, fixup_table);
 686       fixup_table += 4;
 687       bfd_put_32 (output_bfd, 0, fixup_table);
 688       fixup_table += 4;
 689       ++fixups_written;
 690       for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 691        {
 692          if (! f->builtin)
 693            continue;
 694
 695          if (f->h->root.root.type != bfd_link_hash_defined
 696              && f->h->root.root.type != bfd_link_hash_defweak)
 697            {
 698              (*_bfd_error_handler)
 699                (_("Symbol %s not defined for fixups\n"),
 700                 f->h->root.root.root.string);
 701              continue;
 702            }
 703
 704          is = f->h->root.root.u.def.section;
 705          section_offset = is->output_section->vma + is->output_offset;
 706          new_addr = f->h->root.root.u.def.value + section_offset;
 707
 708 #ifdef LINUX_LINK_DEBUG
 709          printf ("Fixup(B) %s: %x %x\n", f->h->root.root.string,
 710                  new_addr, f->value);
 711 #endif
 712
 713          bfd_put_32 (output_bfd, new_addr, fixup_table);
 714          fixup_table += 4;
 715          bfd_put_32 (output_bfd, f->value, fixup_table);
 716          fixup_table += 4;
 717          ++fixups_written;
 718        }
 719   }
 720
 721   if (linux_hash_table (info)->fixup_count != fixups_written)
 722     {
 723       (*_bfd_error_handler) (_("Warning: fixup count mismatch\n"));
 724       while (linux_hash_table (info)->fixup_count > fixups_written)
 725        {
 726          bfd_put_32 (output_bfd, 0, fixup_table);
 727          fixup_table += 4;
 728          bfd_put_32 (output_bfd, 0, fixup_table);
 729          fixup_table += 4;
 730          ++fixups_written;
 731        }
 732     }
 733
 734   h = linux_link_hash_lookup (linux_hash_table (info),
 735                              "__BUILTIN_FIXUPS__",
 736                              false, false, false);
 737
 738   if (h != NULL
 739       && (h->root.root.type == bfd_link_hash_defined
 740          || h->root.root.type == bfd_link_hash_defweak))
 741     {
 742       is = h->root.root.u.def.section;
 743       section_offset = is->output_section->vma + is->output_offset;
 744       new_addr = h->root.root.u.def.value + section_offset;
 745
 746 #ifdef LINUX_LINK_DEBUG
 747       printf ("Builtin fixup table at %x\n", new_addr);
 748 #endif
 749
 750       bfd_put_32 (output_bfd, new_addr, fixup_table);
 751     }
 752   else
 753     bfd_put_32 (output_bfd, 0, fixup_table);
 754
 755   if (bfd_seek (output_bfd, os->filepos + s->output_offset, SEEK_SET) != 0)
 756     return false;
 757
 758   if (bfd_write ((PTR) s->contents, 1, s->_raw_size, output_bfd)
 759       != s->_raw_size)
 760     return false;
 761
 762   return true;
 763 }
 764
 765 #define MY_bfd_link_hash_table_create linux_link_hash_table_create
 766 #define MY_add_one_symbol linux_add_one_symbol
 767 #define MY_finish_dynamic_link linux_finish_dynamic_link
 768
 769 #define MY_zmagic_contiguous 1
 770
 771 #include "aout-target.h"