bfd/m68klinux.c

   1 /* BFD back-end for linux flavored m68k 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, USA.  */
  20
  21 #define TARGET_PAGE_SIZE 4096
  22 #define ZMAGIC_DISK_BLOCK_SIZE 1024
  23 #define SEGMENT_SIZE TARGET_PAGE_SIZE
  24 #define TEXT_START_ADDR 0x0
  25 #define N_SHARED_LIB(x) 0
  26 #define BYTES_IN_WORD 4
  27
  28 #define MACHTYPE_OK(mtype) ((mtype) == M_68020 || (mtype) == M_UNKNOWN)
  29
  30 #include "bfd.h"
  31 #include "sysdep.h"
  32 #include "libbfd.h"
  33 #include "aout/aout64.h"
  34 #include "aout/stab_gnu.h"
  35 #include "aout/ar.h"
  36 #include "libaout.h"           /* BFD a.out internal data structures */
  37
  38 #define TARGET_IS_BIG_ENDIAN_P
  39 #define DEFAULT_ARCH bfd_arch_m68k
  40 #define MY(OP) CAT(m68klinux_,OP)
  41 #define TARGETNAME "a.out-m68k-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 static boolean m68klinux_bfd_final_link
  52   PARAMS ((bfd *, struct bfd_link_info *));
  53 static boolean m68klinux_write_object_contents PARAMS ((bfd *));
  54
  55 static boolean
  56 m68klinux_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 m68klinux_bfd_final_link
  65
  66 /* Set the machine type correctly.  */
  67
  68 static boolean
  69 m68klinux_write_object_contents (abfd)
  70      bfd *abfd;
  71 {
  72   struct external_exec exec_bytes;
  73   struct internal_exec *execp = exec_hdr (abfd);
  74
  75   N_SET_MACHTYPE (*execp, M_68020);
  76
  77   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
  78
  79   WRITE_HEADERS(abfd, execp);
  80
  81   return true;
  82 }
  83
  84 #define MY_write_object_contents m68klinux_write_object_contents
  85 \f
  86 /* Code to link against Linux a.out shared libraries.  */
  87
  88 /* See if a symbol name is a reference to the global offset table.  */
  89
  90 #ifndef GOT_REF_PREFIX
  91 #define GOT_REF_PREFIX  "__GOT_"
  92 #endif
  93
  94 #define IS_GOT_SYM(name) \
  95   (strncmp (name, GOT_REF_PREFIX, sizeof GOT_REF_PREFIX - 1) == 0)
  96
  97 /* See if a symbol name is a reference to the procedure linkage table.  */
  98
  99 #ifndef PLT_REF_PREFIX
 100 #define PLT_REF_PREFIX  "__PLT_"
 101 #endif
 102
 103 #define IS_PLT_SYM(name) \
 104   (strncmp (name, PLT_REF_PREFIX, sizeof PLT_REF_PREFIX - 1) == 0)
 105
 106 /* This string is used to generate specialized error messages.  */
 107
 108 #ifndef NEEDS_SHRLIB
 109 #define NEEDS_SHRLIB "__NEEDS_SHRLIB_"
 110 #endif
 111
 112 /* This special symbol is a set vector that contains a list of
 113    pointers to fixup tables.  It will be present in any dynamicly
 114    linked file.  The linker generated fixup table should also be added
 115    to the list, and it should always appear in the second slot (the
 116    first one is a dummy with a magic number that is defined in
 117    crt0.o).  */
 118
 119 #ifndef SHARABLE_CONFLICTS
 120 #define SHARABLE_CONFLICTS "__SHARABLE_CONFLICTS__"
 121 #endif
 122
 123 /* We keep a list of fixups.  The terminology is a bit strange, but
 124    each fixup contains two 32 bit numbers.  A regular fixup contains
 125    an address and a pointer, and at runtime we should store the
 126    address at the location pointed to by the pointer.  A builtin fixup
 127    contains two pointers, and we should read the address using one
 128    pointer and store it at the location pointed to by the other
 129    pointer.  Builtin fixups come into play when we have duplicate
 130    __GOT__ symbols for the same variable.  The builtin fixup will copy
 131    the GOT pointer from one over into the other.  */
 132
 133 struct fixup
 134 {
 135   struct fixup *next;
 136   struct linux_link_hash_entry *h;
 137   bfd_vma value;
 138
 139   /* Nonzero if this is a jump instruction that needs to be fixed,
 140      zero if this is just a pointer */
 141   char jump;
 142
 143   char builtin;
 144 };
 145
 146 /* We don't need a special hash table entry structure, but we do need
 147    to keep some information between linker passes, so we use a special
 148    hash table.  */
 149
 150 struct linux_link_hash_entry
 151 {
 152   struct aout_link_hash_entry root;
 153 };
 154
 155 struct linux_link_hash_table
 156 {
 157   struct aout_link_hash_table root;
 158
 159   /* First dynamic object found in link.  */
 160   bfd *dynobj;
 161
 162   /* Number of fixups.  */
 163   size_t fixup_count;
 164
 165   /* Number of builtin fixups.  */
 166   size_t local_builtins;
 167
 168   /* List of fixups.  */
 169   struct fixup *fixup_list;
 170 };
 171
 172 static struct bfd_hash_entry *linux_link_hash_newfunc
 173   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 174 static struct bfd_link_hash_table *linux_link_hash_table_create
 175   PARAMS ((bfd *));
 176 static struct fixup *new_fixup
 177   PARAMS ((struct bfd_link_info *, struct linux_link_hash_entry *,
 178            bfd_vma, int));
 179 static boolean linux_link_create_dynamic_sections
 180   PARAMS ((bfd *, struct bfd_link_info *));
 181 static boolean linux_add_one_symbol
 182   PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *,
 183            bfd_vma, const char *, boolean, boolean,
 184            struct bfd_link_hash_entry **));
 185 static boolean linux_tally_symbols
 186   PARAMS ((struct linux_link_hash_entry *, PTR));
 187 static boolean linux_finish_dynamic_link
 188   PARAMS ((bfd *, struct bfd_link_info *));
 189
 190 /* Routine to create an entry in an Linux link hash table.  */
 191
 192 static struct bfd_hash_entry *
 193 linux_link_hash_newfunc (entry, table, string)
 194      struct bfd_hash_entry *entry;
 195      struct bfd_hash_table *table;
 196      const char *string;
 197 {
 198   struct linux_link_hash_entry *ret = (struct linux_link_hash_entry *) entry;
 199
 200   /* Allocate the structure if it has not already been allocated by a
 201      subclass.  */
 202   if (ret == (struct linux_link_hash_entry *) NULL)
 203     ret = ((struct linux_link_hash_entry *)
 204            bfd_hash_allocate (table, sizeof (struct linux_link_hash_entry)));
 205   if (ret == NULL)
 206     return (struct bfd_hash_entry *) ret;
 207
 208   /* Call the allocation method of the superclass.  */
 209   ret = ((struct linux_link_hash_entry *)
 210          NAME(aout,link_hash_newfunc) ((struct bfd_hash_entry *) ret,
 211                                        table, string));
 212   if (ret != NULL)
 213     {
 214       /* Set local fields; there aren't any.  */
 215     }
 216
 217   return (struct bfd_hash_entry *) ret;
 218 }
 219
 220 /* Create a Linux link hash table.  */
 221
 222 static struct bfd_link_hash_table *
 223 linux_link_hash_table_create (abfd)
 224      bfd *abfd;
 225 {
 226   struct linux_link_hash_table *ret;
 227
 228   ret = ((struct linux_link_hash_table *)
 229          bfd_alloc (abfd, sizeof (struct linux_link_hash_table)));
 230   if (ret == (struct linux_link_hash_table *) NULL)
 231     {
 232       bfd_set_error (bfd_error_no_memory);
 233       return (struct bfd_link_hash_table *) NULL;
 234     }
 235   if (! NAME(aout,link_hash_table_init) (&ret->root, abfd,
 236                                          linux_link_hash_newfunc))
 237     {
 238       free (ret);
 239       return (struct bfd_link_hash_table *) NULL;
 240     }
 241
 242   ret->dynobj = NULL;
 243   ret->fixup_count = 0;
 244   ret->local_builtins = 0;
 245   ret->fixup_list = NULL;
 246
 247   return &ret->root.root;
 248 }
 249
 250 /* Look up an entry in a Linux link hash table.  */
 251
 252 #define linux_link_hash_lookup(table, string, create, copy, follow) \
 253   ((struct linux_link_hash_entry *) \
 254    aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\
 255                           (follow)))
 256
 257 /* Traverse a Linux link hash table.  */
 258
 259 #define linux_link_hash_traverse(table, func, info)                     \
 260   (aout_link_hash_traverse                                              \
 261    (&(table)->root,                                                     \
 262     (boolean (*) PARAMS ((struct aout_link_hash_entry *, PTR))) (func), \
 263     (info)))
 264
 265 /* Get the Linux link hash table from the info structure.  This is
 266    just a cast.  */
 267
 268 #define linux_hash_table(p) ((struct linux_link_hash_table *) ((p)->hash))
 269
 270 /* Store the information for a new fixup.  */
 271
 272 static struct fixup *
 273 new_fixup (info, h, value, builtin)
 274      struct bfd_link_info *info;
 275      struct linux_link_hash_entry *h;
 276      bfd_vma value;
 277      int builtin;
 278 {
 279   struct fixup *f;
 280
 281   f = (struct fixup *) bfd_hash_allocate (&info->hash->table,
 282                                           sizeof (struct fixup));
 283   if (f == NULL)
 284     return f;
 285   f->next = linux_hash_table (info)->fixup_list;
 286   linux_hash_table (info)->fixup_list = f;
 287   f->h = h;
 288   f->value = value;
 289   f->builtin = builtin;
 290   f->jump = 0;
 291   ++linux_hash_table (info)->fixup_count;
 292   return f;
 293 }
 294
 295 /* We come here once we realize that we are going to link to a shared
 296    library.  We need to create a special section that contains the
 297    fixup table, and we ultimately need to add a pointer to this into
 298    the set vector for SHARABLE_CONFLICTS.  At this point we do not
 299    know the size of the section, but that's OK - we just need to
 300    create it for now.  */
 301
 302 static boolean
 303 linux_link_create_dynamic_sections (abfd, info)
 304      bfd *abfd;
 305      struct bfd_link_info *info ATTRIBUTE_UNUSED;
 306 {
 307   flagword flags;
 308   register asection *s;
 309
 310   /* Note that we set the SEC_IN_MEMORY flag.  */
 311   flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
 312
 313   /* We choose to use the name ".linux-dynamic" for the fixup table.
 314      Why not? */
 315   s = bfd_make_section (abfd, ".linux-dynamic");
 316   if (s == NULL
 317       || ! bfd_set_section_flags (abfd, s, flags)
 318       || ! bfd_set_section_alignment (abfd, s, 2))
 319     return false;
 320   s->_raw_size = 0;
 321   s->contents = 0;
 322
 323   return true;
 324 }
 325
 326 /* Function to add a single symbol to the linker hash table.  This is
 327    a wrapper around _bfd_generic_link_add_one_symbol which handles the
 328    tweaking needed for dynamic linking support.  */
 329
 330 static boolean
 331 linux_add_one_symbol (info, abfd, name, flags, section, value, string,
 332                       copy, collect, hashp)
 333      struct bfd_link_info *info;
 334      bfd *abfd;
 335      const char *name;
 336      flagword flags;
 337      asection *section;
 338      bfd_vma value;
 339      const char *string;
 340      boolean copy;
 341      boolean collect;
 342      struct bfd_link_hash_entry **hashp;
 343 {
 344   struct linux_link_hash_entry *h;
 345   boolean insert;
 346
 347   /* Look up and see if we already have this symbol in the hash table.
 348      If we do, and the defining entry is from a shared library, we
 349      need to create the dynamic sections.
 350
 351      FIXME: What if abfd->xvec != info->hash->creator?  We may want to
 352      be able to link Linux a.out and ELF objects together, but serious
 353      confusion is possible.  */
 354
 355   insert = false;
 356
 357   if (! info->relocateable
 358       && linux_hash_table (info)->dynobj == NULL
 359       && strcmp (name, SHARABLE_CONFLICTS) == 0
 360       && (flags & BSF_CONSTRUCTOR) != 0
 361       && abfd->xvec == info->hash->creator)
 362     {
 363       if (! linux_link_create_dynamic_sections (abfd, info))
 364         return false;
 365       linux_hash_table (info)->dynobj = abfd;
 366       insert = true;
 367     }
 368
 369   if (bfd_is_abs_section (section)
 370       && abfd->xvec == info->hash->creator)
 371     {
 372       h = linux_link_hash_lookup (linux_hash_table (info), name, false,
 373                                   false, false);
 374       if (h != NULL
 375           && (h->root.root.type == bfd_link_hash_defined
 376               || h->root.root.type == bfd_link_hash_defweak))
 377         {
 378           struct fixup *f;
 379
 380           if (hashp != NULL)
 381             *hashp = (struct bfd_link_hash_entry *) h;
 382
 383           f = new_fixup (info, h, value, ! IS_PLT_SYM (name));
 384           if (f == NULL)
 385             return false;
 386           f->jump = IS_PLT_SYM (name);
 387
 388           return true;
 389         }
 390     }
 391
 392   /* Do the usual procedure for adding a symbol.  */
 393   if (! _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
 394                                           value, string, copy, collect,
 395                                           hashp))
 396     return false;
 397
 398   /* Insert a pointer to our table in the set vector.  The dynamic
 399      linker requires this information */
 400   if (insert)
 401     {
 402       asection *s;
 403
 404       /* Here we do our special thing to add the pointer to the
 405          dynamic section in the SHARABLE_CONFLICTS set vector.  */
 406       s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 407                                    ".linux-dynamic");
 408       BFD_ASSERT (s != NULL);
 409
 410       if (! (_bfd_generic_link_add_one_symbol
 411              (info, linux_hash_table (info)->dynobj, SHARABLE_CONFLICTS,
 412               BSF_GLOBAL | BSF_CONSTRUCTOR, s, 0, NULL, false, false, NULL)))
 413         return false;
 414     }
 415
 416   return true;
 417 }
 418
 419 /* We will crawl the hash table and come here for every global symbol.
 420    We will examine each entry and see if there are indications that we
 421    need to add a fixup.  There are two possible cases - one is where
 422    you have duplicate definitions of PLT or GOT symbols - these will
 423    have already been caught and added as "builtin" fixups.  If we find
 424    that the corresponding non PLT/GOT symbol is also present, we
 425    convert it to a regular fixup instead.
 426
 427    This function is called via linux_link_hash_traverse.  */
 428
 429 static boolean
 430 linux_tally_symbols (h, data)
 431      struct linux_link_hash_entry *h;
 432      PTR data;
 433 {
 434   struct bfd_link_info *info = (struct bfd_link_info *) data;
 435   struct fixup *f, *f1;
 436   int is_plt;
 437   struct linux_link_hash_entry *h1, *h2;
 438   boolean exists;
 439
 440   if (h->root.root.type == bfd_link_hash_undefined
 441       && strncmp (h->root.root.root.string, NEEDS_SHRLIB,
 442                   sizeof NEEDS_SHRLIB - 1) == 0)
 443     {
 444       const char *name;
 445       char *p;
 446       char *alloc = NULL;
 447
 448       name = h->root.root.root.string + sizeof NEEDS_SHRLIB - 1;
 449       p = strrchr (name, '_');
 450       if (p != NULL)
 451         alloc = (char *) bfd_malloc (strlen (name) + 1);
 452
 453       if (p == NULL || alloc == NULL)
 454         (*_bfd_error_handler) (_("Output file requires shared library `%s'\n"),
 455                                name);
 456       else
 457         {
 458           strcpy (alloc, name);
 459           p = strrchr (alloc, '_');
 460           *p++ = '\0';
 461           (*_bfd_error_handler)
 462             (_("Output file requires shared library `%s.so.%s'\n"),
 463              alloc, p);
 464           free (alloc);
 465         }
 466
 467       abort ();
 468     }
 469
 470   /* If this symbol is not a PLT/GOT, we do not even need to look at it */
 471   is_plt = IS_PLT_SYM (h->root.root.root.string);
 472
 473   if (is_plt || IS_GOT_SYM (h->root.root.root.string))
 474     {
 475       /* Look up this symbol twice.  Once just as a regular lookup,
 476          and then again following all of the indirect links until we
 477          reach a real symbol.  */
 478       h1 = linux_link_hash_lookup (linux_hash_table (info),
 479                                    (h->root.root.root.string
 480                                     + sizeof PLT_REF_PREFIX - 1),
 481                                    false, false, true);
 482       /* h2 does not follow indirect symbols. */
 483       h2 = linux_link_hash_lookup (linux_hash_table (info),
 484                                    (h->root.root.root.string
 485                                     + sizeof PLT_REF_PREFIX - 1),
 486                                    false, false, false);
 487
 488       /* The real symbol must exist but if it is also an ABS symbol,
 489          there is no need to have a fixup.  This is because they both
 490          came from the same library.  If on the other hand, we had to
 491          use an indirect symbol to get to the real symbol, we add the
 492          fixup anyway, since there are cases where these symbols come
 493          from different shared libraries */
 494       if (h1 != NULL
 495           && (((h1->root.root.type == bfd_link_hash_defined
 496                 || h1->root.root.type == bfd_link_hash_defweak)
 497                && ! bfd_is_abs_section (h1->root.root.u.def.section))
 498               || h2->root.root.type == bfd_link_hash_indirect))
 499         {
 500           /* See if there is a "builtin" fixup already present
 501              involving this symbol.  If so, convert it to a regular
 502              fixup.  In the end, this relaxes some of the requirements
 503              about the order of performing fixups.  */
 504           exists = false;
 505           for (f1 = linux_hash_table (info)->fixup_list;
 506                f1 != NULL;
 507                f1 = f1->next)
 508             {
 509               if ((f1->h != h && f1->h != h1)
 510                   || (! f1->builtin && ! f1->jump))
 511                 continue;
 512               if (f1->h == h1)
 513                 exists = true;
 514               if (! exists
 515                   && bfd_is_abs_section (h->root.root.u.def.section))
 516                 {
 517                   f = new_fixup (info, h1, f1->h->root.root.u.def.value, 0);
 518                   f->jump = is_plt;
 519                 }
 520               f1->h = h1;
 521               f1->jump = is_plt;
 522               f1->builtin = 0;
 523               exists = true;
 524             }
 525           if (! exists
 526               && bfd_is_abs_section (h->root.root.u.def.section))
 527             {
 528               f = new_fixup (info, h1, h->root.root.u.def.value, 0);
 529               if (f == NULL)
 530                 {
 531                   /* FIXME: No way to return error.  */
 532                   abort ();
 533                 }
 534               f->jump = is_plt;
 535             }
 536         }
 537
 538       /* Quick and dirty way of stripping these symbols from the
 539          symtab. */
 540       if (bfd_is_abs_section (h->root.root.u.def.section))
 541         h->root.written = true;
 542     }
 543
 544   return true;
 545 }
 546
 547 /* This is called to set the size of the .linux-dynamic section is.
 548    It is called by the Linux linker emulation before_allocation
 549    routine.  We have finished reading all of the input files, and now
 550    we just scan the hash tables to find out how many additional fixups
 551    are required.  */
 552
 553 boolean
 554 bfd_m68klinux_size_dynamic_sections (output_bfd, info)
 555      bfd *output_bfd;
 556      struct bfd_link_info *info;
 557 {
 558   struct fixup *f;
 559   asection *s;
 560
 561   if (output_bfd->xvec != &MY(vec))
 562     return true;
 563
 564   /* First find the fixups... */
 565   linux_link_hash_traverse (linux_hash_table (info),
 566                             linux_tally_symbols,
 567                             (PTR) info);
 568
 569   /* If there are builtin fixups, leave room for a marker.  This is
 570      used by the dynamic linker so that it knows that all that follow
 571      are builtin fixups instead of regular fixups.  */
 572   for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 573     {
 574       if (f->builtin)
 575         {
 576           ++linux_hash_table (info)->fixup_count;
 577           ++linux_hash_table (info)->local_builtins;
 578           break;
 579         }
 580     }
 581
 582   if (linux_hash_table (info)->dynobj == NULL)
 583     {
 584       if (linux_hash_table (info)->fixup_count > 0)
 585         abort ();
 586       return true;
 587     }
 588
 589   /* Allocate memory for our fixup table.  We will fill it in later.  */
 590   s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 591                                ".linux-dynamic");
 592   if (s != NULL)
 593     {
 594       s->_raw_size = 8 + linux_hash_table (info)->fixup_count * 8;
 595       s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
 596       if (s->contents == NULL)
 597         {
 598           bfd_set_error (bfd_error_no_memory);
 599           return false;
 600         }
 601       memset (s->contents, 0, (size_t) s->_raw_size);
 602     }
 603
 604   return true;
 605 }
 606
 607 /* We come here once we are ready to actually write the fixup table to
 608    the output file.  Scan the fixup tables and so forth and generate
 609    the stuff we need.  */
 610
 611 static boolean
 612 linux_finish_dynamic_link (output_bfd, info)
 613      bfd *output_bfd;
 614      struct bfd_link_info *info;
 615 {
 616   asection *s, *os, *is;
 617   bfd_byte *fixup_table;
 618   struct linux_link_hash_entry *h;
 619   struct fixup *f;
 620   unsigned int new_addr;
 621   int section_offset;
 622   unsigned int fixups_written;
 623
 624   if (linux_hash_table (info)->dynobj == NULL)
 625     return true;
 626
 627   s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 628                                ".linux-dynamic");
 629   BFD_ASSERT (s != NULL);
 630   os = s->output_section;
 631   fixups_written = 0;
 632
 633 #ifdef LINUX_LINK_DEBUG
 634   printf ("Fixup table file offset: %x  VMA: %x\n",
 635           os->filepos + s->output_offset,
 636           os->vma + s->output_offset);
 637 #endif
 638
 639   fixup_table = s->contents;
 640   bfd_put_32 (output_bfd, linux_hash_table (info)->fixup_count, fixup_table);
 641   fixup_table += 4;
 642
 643   /* Fill in fixup table.  */
 644   for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 645     {
 646       if (f->builtin)
 647         continue;
 648
 649       if (f->h->root.root.type != bfd_link_hash_defined
 650           && f->h->root.root.type != bfd_link_hash_defweak)
 651         {
 652           (*_bfd_error_handler)
 653             (_("Symbol %s not defined for fixups\n"),
 654              f->h->root.root.root.string);
 655           continue;
 656         }
 657
 658       is = f->h->root.root.u.def.section;
 659       section_offset = is->output_section->vma + is->output_offset;
 660       new_addr = f->h->root.root.u.def.value + section_offset;
 661
 662 #ifdef LINUX_LINK_DEBUG
 663       printf ("Fixup(%d) %s: %x %x\n",f->jump, f->h->root.root.string,
 664               new_addr, f->value);
 665 #endif
 666
 667       if (f->jump)
 668         {
 669           bfd_put_32 (output_bfd, new_addr, fixup_table);
 670           fixup_table += 4;
 671           bfd_put_32 (output_bfd, f->value + 2, fixup_table);
 672           fixup_table += 4;
 673         }
 674       else
 675         {
 676           bfd_put_32 (output_bfd, new_addr, fixup_table);
 677           fixup_table += 4;
 678           bfd_put_32 (output_bfd, f->value, fixup_table);
 679           fixup_table += 4;
 680         }
 681       ++fixups_written;
 682     }
 683
 684   if (linux_hash_table (info)->local_builtins != 0)
 685     {
 686       /* Special marker so we know to switch to the other type of fixup */
 687       bfd_put_32 (output_bfd, 0, fixup_table);
 688       fixup_table += 4;
 689       bfd_put_32 (output_bfd, 0, fixup_table);
 690       fixup_table += 4;
 691       ++fixups_written;
 692       for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 693         {
 694           if (! f->builtin)
 695             continue;
 696
 697           if (f->h->root.root.type != bfd_link_hash_defined
 698               && f->h->root.root.type != bfd_link_hash_defweak)
 699             {
 700               (*_bfd_error_handler)
 701                 (_("Symbol %s not defined for fixups\n"),
 702                  f->h->root.root.root.string);
 703               continue;
 704             }
 705
 706           is = f->h->root.root.u.def.section;
 707           section_offset = is->output_section->vma + is->output_offset;
 708           new_addr = f->h->root.root.u.def.value + section_offset;
 709
 710 #ifdef LINUX_LINK_DEBUG
 711           printf ("Fixup(B) %s: %x %x\n", f->h->root.root.string,
 712                   new_addr, f->value);
 713 #endif
 714
 715           bfd_put_32 (output_bfd, new_addr, fixup_table);
 716           fixup_table += 4;
 717           bfd_put_32 (output_bfd, f->value, fixup_table);
 718           fixup_table += 4;
 719           ++fixups_written;
 720         }
 721   }
 722
 723   if (linux_hash_table (info)->fixup_count != fixups_written)
 724     {
 725       (*_bfd_error_handler) (_("Warning: fixup count mismatch\n"));
 726       while (linux_hash_table (info)->fixup_count > fixups_written)
 727         {
 728           bfd_put_32 (output_bfd, 0, fixup_table);
 729           fixup_table += 4;
 730           bfd_put_32 (output_bfd, 0, fixup_table);
 731           fixup_table += 4;
 732           ++fixups_written;
 733         }
 734     }
 735
 736   h = linux_link_hash_lookup (linux_hash_table (info),
 737                               "__BUILTIN_FIXUPS__",
 738                               false, false, false);
 739
 740   if (h != NULL
 741       && (h->root.root.type == bfd_link_hash_defined
 742           || h->root.root.type == bfd_link_hash_defweak))
 743     {
 744       is = h->root.root.u.def.section;
 745       section_offset = is->output_section->vma + is->output_offset;
 746       new_addr = h->root.root.u.def.value + section_offset;
 747
 748 #ifdef LINUX_LINK_DEBUG
 749       printf ("Builtin fixup table at %x\n", new_addr);
 750 #endif
 751
 752       bfd_put_32 (output_bfd, new_addr, fixup_table);
 753     }
 754   else
 755     bfd_put_32 (output_bfd, 0, fixup_table);
 756
 757   if (bfd_seek (output_bfd, os->filepos + s->output_offset, SEEK_SET) != 0)
 758     return false;
 759
 760   if (bfd_write ((PTR) s->contents, 1, s->_raw_size, output_bfd)
 761       != s->_raw_size)
 762     return false;
 763
 764   return true;
 765 }
 766
 767 #define MY_bfd_link_hash_table_create linux_link_hash_table_create
 768 #define MY_add_one_symbol linux_add_one_symbol
 769 #define MY_finish_dynamic_link linux_finish_dynamic_link
 770
 771 #define MY_zmagic_contiguous 1
 772
 773 #include "aout-target.h"