bfd/sparclinux.c

   1 /* BFD back-end for linux flavored sparc a.out binaries.
   2    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 2000, 2001
   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 /* Do not "beautify" the CONCAT* macro args.  Traditional C will not
  41    remove whitespace added here, and thus will fail to concatenate
  42    the tokens.  */
  43 #define MY(OP) CONCAT2 (sparclinux_,OP)
  44 #define TARGETNAME "a.out-sparc-linux"
  45
  46 extern const bfd_target MY(vec);
  47
  48 /* We always generate QMAGIC files in preference to ZMAGIC files.  It
  49    would be possible to make this a linker option, if that ever
  50    becomes important.  */
  51
  52 static void MY_final_link_callback
  53   PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
  54
  55 static boolean sparclinux_bfd_final_link
  56   PARAMS ((bfd *abfd, struct bfd_link_info *info));
  57
  58 static boolean
  59 sparclinux_bfd_final_link (abfd, info)
  60      bfd *abfd;
  61      struct bfd_link_info *info;
  62 {
  63   obj_aout_subformat (abfd) = q_magic_format;
  64   return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
  65 }
  66
  67 #define MY_bfd_final_link sparclinux_bfd_final_link
  68
  69 /* Set the machine type correctly.  */
  70
  71 static boolean sparclinux_write_object_contents PARAMS ((bfd *abfd));
  72
  73 static boolean
  74 sparclinux_write_object_contents (abfd)
  75      bfd *abfd;
  76 {
  77   struct external_exec exec_bytes;
  78   struct internal_exec *execp = exec_hdr (abfd);
  79
  80   N_SET_MACHTYPE (*execp, M_SPARC);
  81
  82   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
  83
  84   WRITE_HEADERS(abfd, execp);
  85
  86   return true;
  87 }
  88
  89 #define MY_write_object_contents sparclinux_write_object_contents
  90 /* Code to link against Linux a.out shared libraries.  */
  91
  92 /* See if a symbol name is a reference to the global offset table.  */
  93
  94 #ifndef GOT_REF_PREFIX
  95 #define        GOT_REF_PREFIX  "__GOT_"
  96 #endif
  97
  98 #define IS_GOT_SYM(name) \
  99   (strncmp (name, GOT_REF_PREFIX, sizeof GOT_REF_PREFIX - 1) == 0)
 100
 101 /* See if a symbol name is a reference to the procedure linkage table.  */
 102
 103 #ifndef PLT_REF_PREFIX
 104 #define        PLT_REF_PREFIX  "__PLT_"
 105 #endif
 106
 107 #define IS_PLT_SYM(name) \
 108   (strncmp (name, PLT_REF_PREFIX, sizeof PLT_REF_PREFIX - 1) == 0)
 109
 110 /* This string is used to generate specialized error messages.  */
 111
 112 #ifndef NEEDS_SHRLIB
 113 #define NEEDS_SHRLIB "__NEEDS_SHRLIB_"
 114 #endif
 115
 116 /* This special symbol is a set vector that contains a list of
 117    pointers to fixup tables.  It will be present in any dynamicly
 118    linked file.  The linker generated fixup table should also be added
 119    to the list, and it should always appear in the second slot (the
 120    first one is a dummy with a magic number that is defined in
 121    crt0.o).  */
 122
 123 #ifndef SHARABLE_CONFLICTS
 124 #define SHARABLE_CONFLICTS "__SHARABLE_CONFLICTS__"
 125 #endif
 126
 127 /* We keep a list of fixups.  The terminology is a bit strange, but
 128    each fixup contains two 32 bit numbers.  A regular fixup contains
 129    an address and a pointer, and at runtime we should store the
 130    address at the location pointed to by the pointer.  A builtin fixup
 131    contains two pointers, and we should read the address using one
 132    pointer and store it at the location pointed to by the other
 133    pointer.  Builtin fixups come into play when we have duplicate
 134    __GOT__ symbols for the same variable.  The builtin fixup will copy
 135    the GOT pointer from one over into the other.  */
 136
 137 struct fixup
 138 {
 139   struct fixup *next;
 140   struct linux_link_hash_entry *h;
 141   bfd_vma value;
 142
 143   /* Nonzero if this is a jump instruction that needs to be fixed,
 144      zero if this is just a pointer */
 145   char jump;
 146
 147   char builtin;
 148 };
 149
 150 /* We don't need a special hash table entry structure, but we do need
 151    to keep some information between linker passes, so we use a special
 152    hash table.  */
 153
 154 struct linux_link_hash_entry
 155 {
 156   struct aout_link_hash_entry root;
 157 };
 158
 159 struct linux_link_hash_table
 160 {
 161   struct aout_link_hash_table root;
 162
 163   /* First dynamic object found in link.  */
 164   bfd *dynobj;
 165
 166   /* Number of fixups.  */
 167   size_t fixup_count;
 168
 169   /* Number of builtin fixups.  */
 170   size_t local_builtins;
 171
 172   /* List of fixups.  */
 173   struct fixup *fixup_list;
 174 };
 175
 176 static struct bfd_hash_entry *linux_link_hash_newfunc
 177   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 178 static struct bfd_link_hash_table *linux_link_hash_table_create
 179   PARAMS ((bfd *));
 180 static struct fixup *new_fixup
 181   PARAMS ((struct bfd_link_info *, struct linux_link_hash_entry *,
 182           bfd_vma, int));
 183 static boolean linux_link_create_dynamic_sections
 184   PARAMS ((bfd *, struct bfd_link_info *));
 185 static boolean linux_add_one_symbol
 186   PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *,
 187           bfd_vma, const char *, boolean, boolean,
 188           struct bfd_link_hash_entry **));
 189 static boolean linux_tally_symbols
 190   PARAMS ((struct linux_link_hash_entry *, PTR));
 191 static boolean linux_finish_dynamic_link
 192   PARAMS ((bfd *, struct bfd_link_info *));
 193
 194 /* Routine to create an entry in an Linux link hash table.  */
 195
 196 static struct bfd_hash_entry *
 197 linux_link_hash_newfunc (entry, table, string)
 198      struct bfd_hash_entry *entry;
 199      struct bfd_hash_table *table;
 200      const char *string;
 201 {
 202   struct linux_link_hash_entry *ret = (struct linux_link_hash_entry *) entry;
 203
 204   /* Allocate the structure if it has not already been allocated by a
 205      subclass.  */
 206   if (ret == (struct linux_link_hash_entry *) NULL)
 207     ret = ((struct linux_link_hash_entry *)
 208           bfd_hash_allocate (table, sizeof (struct linux_link_hash_entry)));
 209   if (ret == NULL)
 210     return (struct bfd_hash_entry *) ret;
 211
 212   /* Call the allocation method of the superclass.  */
 213   ret = ((struct linux_link_hash_entry *)
 214         NAME(aout,link_hash_newfunc) ((struct bfd_hash_entry *) ret,
 215                                       table, string));
 216   if (ret != NULL)
 217     {
 218       /* Set local fields; there aren't any.  */
 219     }
 220
 221   return (struct bfd_hash_entry *) ret;
 222 }
 223
 224 /* Create a Linux link hash table.  */
 225
 226 static struct bfd_link_hash_table *
 227 linux_link_hash_table_create (abfd)
 228      bfd *abfd;
 229 {
 230   struct linux_link_hash_table *ret;
 231   bfd_size_type amt = sizeof (struct linux_link_hash_table);
 232
 233   ret = (struct linux_link_hash_table *) bfd_alloc (abfd, amt);
 234   if (ret == (struct linux_link_hash_table *) NULL)
 235     return (struct bfd_link_hash_table *) NULL;
 236   if (! NAME(aout,link_hash_table_init) (&ret->root, abfd,
 237                                         linux_link_hash_newfunc))
 238     {
 239       free (ret);
 240       return (struct bfd_link_hash_table *) NULL;
 241     }
 242
 243   ret->dynobj = NULL;
 244   ret->fixup_count = 0;
 245   ret->local_builtins = 0;
 246   ret->fixup_list = NULL;
 247
 248   return &ret->root.root;
 249 }
 250
 251 /* Look up an entry in a Linux link hash table.  */
 252
 253 #define linux_link_hash_lookup(table, string, create, copy, follow) \
 254   ((struct linux_link_hash_entry *) \
 255    aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\
 256                          (follow)))
 257
 258 /* Traverse a Linux link hash table.  */
 259
 260 #define linux_link_hash_traverse(table, func, info)                    \
 261   (aout_link_hash_traverse                                             \
 262    (&(table)->root,                                                    \
 263     (boolean (*) PARAMS ((struct aout_link_hash_entry *, PTR))) (func), \
 264     (info)))
 265
 266 /* Get the Linux link hash table from the info structure.  This is
 267    just a cast.  */
 268
 269 #define linux_hash_table(p) ((struct linux_link_hash_table *) ((p)->hash))
 270
 271 /* Store the information for a new fixup.  */
 272
 273 static struct fixup *
 274 new_fixup (info, h, value, builtin)
 275      struct bfd_link_info *info;
 276      struct linux_link_hash_entry *h;
 277      bfd_vma value;
 278      int builtin;
 279 {
 280   struct fixup *f;
 281
 282   f = (struct fixup *) bfd_hash_allocate (&info->hash->table,
 283                                          sizeof (struct fixup));
 284   if (f == NULL)
 285     return f;
 286   f->next = linux_hash_table (info)->fixup_list;
 287   linux_hash_table (info)->fixup_list = f;
 288   f->h = h;
 289   f->value = value;
 290   f->builtin = builtin;
 291   f->jump = 0;
 292   ++linux_hash_table (info)->fixup_count;
 293   return f;
 294 }
 295
 296 /* We come here once we realize that we are going to link to a shared
 297    library.  We need to create a special section that contains the
 298    fixup table, and we ultimately need to add a pointer to this into
 299    the set vector for SHARABLE_CONFLICTS.  At this point we do not
 300    know the size of the section, but that's OK - we just need to
 301    create it for now.  */
 302
 303 static boolean
 304 linux_link_create_dynamic_sections (abfd, info)
 305      bfd *abfd;
 306      struct bfd_link_info *info ATTRIBUTE_UNUSED;
 307 {
 308   flagword flags;
 309   register asection *s;
 310
 311   /* Note that we set the SEC_IN_MEMORY flag.  */
 312   flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
 313
 314   /* We choose to use the name ".linux-dynamic" for the fixup table.
 315      Why not? */
 316   s = bfd_make_section (abfd, ".linux-dynamic");
 317   if (s == NULL
 318       || ! bfd_set_section_flags (abfd, s, flags)
 319       || ! bfd_set_section_alignment (abfd, s, 2))
 320     return false;
 321   s->_raw_size = 0;
 322   s->contents = 0;
 323
 324   return true;
 325 }
 326
 327 /* Function to add a single symbol to the linker hash table.  This is
 328    a wrapper around _bfd_generic_link_add_one_symbol which handles the
 329    tweaking needed for dynamic linking support.  */
 330
 331 static boolean
 332 linux_add_one_symbol (info, abfd, name, flags, section, value, string,
 333                      copy, collect, hashp)
 334      struct bfd_link_info *info;
 335      bfd *abfd;
 336      const char *name;
 337      flagword flags;
 338      asection *section;
 339      bfd_vma value;
 340      const char *string;
 341      boolean copy;
 342      boolean collect;
 343      struct bfd_link_hash_entry **hashp;
 344 {
 345   struct linux_link_hash_entry *h;
 346   boolean insert;
 347
 348   /* Look up and see if we already have this symbol in the hash table.
 349      If we do, and the defining entry is from a shared library, we
 350      need to create the dynamic sections.
 351
 352      FIXME: What if abfd->xvec != info->hash->creator?  We may want to
 353      be able to link Linux a.out and ELF objects together, but serious
 354      confusion is possible.  */
 355
 356   insert = false;
 357
 358   if (! info->relocateable
 359       && linux_hash_table (info)->dynobj == NULL
 360       && strcmp (name, SHARABLE_CONFLICTS) == 0
 361       && (flags & BSF_CONSTRUCTOR) != 0
 362       && abfd->xvec == info->hash->creator)
 363     {
 364       if (! linux_link_create_dynamic_sections (abfd, info))
 365        return false;
 366       linux_hash_table (info)->dynobj = abfd;
 367       insert = true;
 368     }
 369
 370   if (bfd_is_abs_section (section)
 371       && abfd->xvec == info->hash->creator)
 372     {
 373       h = linux_link_hash_lookup (linux_hash_table (info), name, false,
 374                                  false, false);
 375       if (h != NULL
 376          && (h->root.root.type == bfd_link_hash_defined
 377              || h->root.root.type == bfd_link_hash_defweak))
 378        {
 379          struct fixup *f;
 380
 381          if (hashp != NULL)
 382            *hashp = (struct bfd_link_hash_entry *) h;
 383
 384          f = new_fixup (info, h, value, ! IS_PLT_SYM (name));
 385          if (f == NULL)
 386            return false;
 387          f->jump = IS_PLT_SYM (name);
 388
 389          return true;
 390        }
 391     }
 392
 393   /* Do the usual procedure for adding a symbol.  */
 394   if (! _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
 395                                          value, string, copy, collect,
 396                                          hashp))
 397     return false;
 398
 399   /* Insert a pointer to our table in the set vector.  The dynamic
 400      linker requires this information */
 401   if (insert)
 402     {
 403       asection *s;
 404
 405       /* Here we do our special thing to add the pointer to the
 406         dynamic section in the SHARABLE_CONFLICTS set vector.  */
 407       s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 408                                   ".linux-dynamic");
 409       BFD_ASSERT (s != NULL);
 410
 411       if (! (_bfd_generic_link_add_one_symbol
 412             (info, linux_hash_table (info)->dynobj, SHARABLE_CONFLICTS,
 413              BSF_GLOBAL | BSF_CONSTRUCTOR, s, (bfd_vma) 0, NULL,
 414              false, false, NULL)))
 415        return false;
 416     }
 417
 418   return true;
 419 }
 420
 421 /* We will crawl the hash table and come here for every global symbol.
 422    We will examine each entry and see if there are indications that we
 423    need to add a fixup.  There are two possible cases - one is where
 424    you have duplicate definitions of PLT or GOT symbols - these will
 425    have already been caught and added as "builtin" fixups.  If we find
 426    that the corresponding non PLT/GOT symbol is also present, we
 427    convert it to a regular fixup instead.
 428
 429    This function is called via linux_link_hash_traverse.  */
 430
 431 static boolean
 432 linux_tally_symbols (h, data)
 433      struct linux_link_hash_entry *h;
 434      PTR data;
 435 {
 436   struct bfd_link_info *info = (struct bfd_link_info *) data;
 437   struct fixup *f, *f1;
 438   int is_plt;
 439   struct linux_link_hash_entry *h1, *h2;
 440   boolean exists;
 441
 442   if (h->root.root.type == bfd_link_hash_undefined
 443       && strncmp (h->root.root.root.string, NEEDS_SHRLIB,
 444                  sizeof NEEDS_SHRLIB - 1) == 0)
 445     {
 446       const char *name;
 447       char *p;
 448       char *alloc = NULL;
 449
 450       name = h->root.root.root.string + sizeof NEEDS_SHRLIB - 1;
 451       p = strrchr (name, '_');
 452       if (p != NULL)
 453        alloc = (char *) bfd_malloc ((bfd_size_type) strlen (name) + 1);
 454
 455       if (p == NULL || alloc == NULL)
 456        (*_bfd_error_handler) (_("Output file requires shared library `%s'\n"),
 457                               name);
 458       else
 459        {
 460          strcpy (alloc, name);
 461          p = strrchr (alloc, '_');
 462          *p++ = '\0';
 463          (*_bfd_error_handler)
 464            (_("Output file requires shared library `%s.so.%s'\n"),
 465             alloc, p);
 466          free (alloc);
 467        }
 468
 469       abort ();
 470     }
 471
 472   /* If this symbol is not a PLT/GOT, we do not even need to look at
 473      it.  */
 474   is_plt = IS_PLT_SYM (h->root.root.root.string);
 475
 476   if (is_plt || IS_GOT_SYM (h->root.root.root.string))
 477     {
 478       /* Look up this symbol twice.  Once just as a regular lookup,
 479         and then again following all of the indirect links until we
 480         reach a real symbol.  */
 481       h1 = linux_link_hash_lookup (linux_hash_table (info),
 482                                   (h->root.root.root.string
 483                                    + sizeof PLT_REF_PREFIX - 1),
 484                                   false, false, true);
 485       /* h2 does not follow indirect symbols.  */
 486       h2 = linux_link_hash_lookup (linux_hash_table (info),
 487                                   (h->root.root.root.string
 488                                    + sizeof PLT_REF_PREFIX - 1),
 489                                   false, false, false);
 490
 491       /* The real symbol must exist but if it is also an ABS symbol,
 492         there is no need to have a fixup.  This is because they both
 493         came from the same library.  If on the other hand, we had to
 494         use an indirect symbol to get to the real symbol, we add the
 495         fixup anyway, since there are cases where these symbols come
 496         from different shared libraries */
 497       if (h1 != NULL
 498          && (((h1->root.root.type == bfd_link_hash_defined
 499                || h1->root.root.type == bfd_link_hash_defweak)
 500               && ! bfd_is_abs_section (h1->root.root.u.def.section))
 501              || h2->root.root.type == bfd_link_hash_indirect))
 502        {
 503          /* See if there is a "builtin" fixup already present
 504             involving this symbol.  If so, convert it to a regular
 505             fixup.  In the end, this relaxes some of the requirements
 506             about the order of performing fixups.  */
 507          exists = false;
 508          for (f1 = linux_hash_table (info)->fixup_list;
 509               f1 != NULL;
 510               f1 = f1->next)
 511            {
 512              if ((f1->h != h && f1->h != h1)
 513                  || (! f1->builtin && ! f1->jump))
 514                continue;
 515              if (f1->h == h1)
 516               exists = true;
 517              if (! exists
 518                  && bfd_is_abs_section (h->root.root.u.def.section))
 519                {
 520                  f = new_fixup (info, h1, f1->h->root.root.u.def.value, 0);
 521                  f->jump = is_plt;
 522                }
 523              f1->h = h1;
 524              f1->jump = is_plt;
 525              f1->builtin = 0;
 526              exists = true;
 527            }
 528          if (! exists
 529              && bfd_is_abs_section (h->root.root.u.def.section))
 530            {
 531              f = new_fixup (info, h1, h->root.root.u.def.value, 0);
 532              if (f == NULL)
 533                {
 534                  /* FIXME: No way to return error.  */
 535                  abort ();
 536                }
 537              f->jump = is_plt;
 538            }
 539        }
 540
 541       /* Quick and dirty way of stripping these symbols from the
 542         symtab.  */
 543       if (bfd_is_abs_section (h->root.root.u.def.section))
 544        h->root.written = true;
 545     }
 546
 547   return true;
 548 }
 549
 550 /* This is called to set the size of the .linux-dynamic section is.
 551    It is called by the Linux linker emulation before_allocation
 552    routine.  We have finished reading all of the input files, and now
 553    we just scan the hash tables to find out how many additional fixups
 554    are required.  */
 555
 556 boolean
 557 bfd_sparclinux_size_dynamic_sections (output_bfd, info)
 558      bfd *output_bfd;
 559      struct bfd_link_info *info;
 560 {
 561   struct fixup *f;
 562   asection *s;
 563
 564   if (output_bfd->xvec != &MY(vec))
 565     return true;
 566
 567   /* First find the fixups...  */
 568   linux_link_hash_traverse (linux_hash_table (info),
 569                            linux_tally_symbols,
 570                            (PTR) info);
 571
 572   /* If there are builtin fixups, leave room for a marker.  This is
 573      used by the dynamic linker so that it knows that all that follow
 574      are builtin fixups instead of regular fixups.  */
 575   for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 576     {
 577       if (f->builtin)
 578        {
 579          ++linux_hash_table (info)->fixup_count;
 580          ++linux_hash_table (info)->local_builtins;
 581          break;
 582        }
 583     }
 584
 585   if (linux_hash_table (info)->dynobj == NULL)
 586     {
 587       if (linux_hash_table (info)->fixup_count > 0)
 588       abort ();
 589       return true;
 590     }
 591
 592   /* Allocate memory for our fixup table.  We will fill it in later.  */
 593   s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 594                               ".linux-dynamic");
 595   if (s != NULL)
 596     {
 597       s->_raw_size = linux_hash_table (info)->fixup_count + 1;
 598       s->_raw_size *= 8;
 599       s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
 600       if (s->contents == NULL)
 601        return false;
 602       memset (s->contents, 0, (size_t) s->_raw_size);
 603     }
 604
 605   return true;
 606 }
 607
 608 /* We come here once we are ready to actually write the fixup table to
 609    the output file.  Scan the fixup tables and so forth and generate
 610    the stuff we need.  */
 611
 612 static boolean
 613 linux_finish_dynamic_link (output_bfd, info)
 614      bfd *output_bfd;
 615      struct bfd_link_info *info;
 616 {
 617   asection *s, *os, *is;
 618   bfd_byte *fixup_table;
 619   struct linux_link_hash_entry *h;
 620   struct fixup *f;
 621   unsigned int new_addr;
 622   int section_offset;
 623   unsigned int fixups_written;
 624
 625   if (linux_hash_table (info)->dynobj == NULL)
 626     return true;
 627
 628   s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 629                               ".linux-dynamic");
 630   BFD_ASSERT (s != NULL);
 631   os = s->output_section;
 632   fixups_written = 0;
 633
 634 #ifdef LINUX_LINK_DEBUG
 635   printf ("Fixup table file offset: %x  VMA: %x\n",
 636          os->filepos + s->output_offset,
 637          os->vma + s->output_offset);
 638 #endif
 639
 640   fixup_table = s->contents;
 641   bfd_put_32 (output_bfd,
 642               (bfd_vma) linux_hash_table (info)->fixup_count, fixup_table);
 643   fixup_table += 4;
 644
 645   /* Fill in fixup table.  */
 646   for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 647     {
 648       if (f->builtin)
 649        continue;
 650
 651       if (f->h->root.root.type != bfd_link_hash_defined
 652          && f->h->root.root.type != bfd_link_hash_defweak)
 653        {
 654          (*_bfd_error_handler)
 655            (_("Symbol %s not defined for fixups\n"),
 656             f->h->root.root.root.string);
 657          continue;
 658        }
 659
 660       is = f->h->root.root.u.def.section;
 661       section_offset = is->output_section->vma + is->output_offset;
 662       new_addr = f->h->root.root.u.def.value + section_offset;
 663
 664 #ifdef LINUX_LINK_DEBUG
 665       printf ("Fixup(%d) %s: %x %x\n",f->jump, f->h->root.root.string,
 666              new_addr, f->value);
 667 #endif
 668
 669       if (f->jump)
 670        {
 671          /* Relative address */
 672          new_addr = new_addr - (f->value + 5);
 673          bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
 674          fixup_table += 4;
 675          bfd_put_32 (output_bfd, f->value + 1, fixup_table);
 676          fixup_table += 4;
 677        }
 678       else
 679        {
 680          bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
 681          fixup_table += 4;
 682          bfd_put_32 (output_bfd, f->value, fixup_table);
 683          fixup_table += 4;
 684        }
 685       ++fixups_written;
 686     }
 687
 688   if (linux_hash_table (info)->local_builtins != 0)
 689     {
 690       /* Special marker so we know to switch to the other type of fixup */
 691       bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
 692       fixup_table += 4;
 693       bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
 694       fixup_table += 4;
 695       ++fixups_written;
 696       for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 697        {
 698          if (! f->builtin)
 699            continue;
 700
 701          if (f->h->root.root.type != bfd_link_hash_defined
 702              && f->h->root.root.type != bfd_link_hash_defweak)
 703            {
 704              (*_bfd_error_handler)
 705                (_("Symbol %s not defined for fixups\n"),
 706                 f->h->root.root.root.string);
 707              continue;
 708            }
 709
 710          is = f->h->root.root.u.def.section;
 711          section_offset = is->output_section->vma + is->output_offset;
 712          new_addr = f->h->root.root.u.def.value + section_offset;
 713
 714 #ifdef LINUX_LINK_DEBUG
 715          printf ("Fixup(B) %s: %x %x\n", f->h->root.root.string,
 716                  new_addr, f->value);
 717 #endif
 718
 719          bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
 720          fixup_table += 4;
 721          bfd_put_32 (output_bfd, f->value, fixup_table);
 722          fixup_table += 4;
 723          ++fixups_written;
 724        }
 725   }
 726
 727   if (linux_hash_table (info)->fixup_count != fixups_written)
 728     {
 729       (*_bfd_error_handler) (_("Warning: fixup count mismatch\n"));
 730       while (linux_hash_table (info)->fixup_count > fixups_written)
 731        {
 732          bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
 733          fixup_table += 4;
 734          bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
 735          fixup_table += 4;
 736          ++fixups_written;
 737        }
 738     }
 739
 740   h = linux_link_hash_lookup (linux_hash_table (info),
 741                              "__BUILTIN_FIXUPS__",
 742                              false, false, false);
 743
 744   if (h != NULL
 745       && (h->root.root.type == bfd_link_hash_defined
 746          || h->root.root.type == bfd_link_hash_defweak))
 747     {
 748       is = h->root.root.u.def.section;
 749       section_offset = is->output_section->vma + is->output_offset;
 750       new_addr = h->root.root.u.def.value + section_offset;
 751
 752 #ifdef LINUX_LINK_DEBUG
 753       printf ("Builtin fixup table at %x\n", new_addr);
 754 #endif
 755
 756       bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
 757     }
 758   else
 759     bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
 760
 761   if (bfd_seek (output_bfd, (file_ptr) (os->filepos + s->output_offset),
 762                 SEEK_SET) != 0)
 763     return false;
 764
 765   if (bfd_bwrite ((PTR) s->contents, s->_raw_size, output_bfd)
 766       != s->_raw_size)
 767     return false;
 768
 769   return true;
 770 }
 771
 772 #define MY_bfd_link_hash_table_create linux_link_hash_table_create
 773 #define MY_add_one_symbol linux_add_one_symbol
 774 #define MY_finish_dynamic_link linux_finish_dynamic_link
 775
 776 #define MY_zmagic_contiguous 1
 777
 778 #include "aout-target.h"