bfd/sparclinux.c

   1 /* BFD back-end for linux flavored sparc a.out binaries.
   2    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002,
   3    2003, 2004, 2006, 2007, 2008 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, 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
  28 #define MACHTYPE_OK(mtype) ((mtype) == M_SPARC || (mtype) == M_UNKNOWN)
  29
  30 #include "sysdep.h"
  31 #include "bfd.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 DEFAULT_ARCH bfd_arch_sparc
  39 /* Do not "beautify" the CONCAT* macro args.  Traditional C will not
  40    remove whitespace added here, and thus will fail to concatenate
  41    the tokens.  */
  42 #define MY(OP) CONCAT2 (sparclinux_,OP)
  43 #define TARGETNAME "a.out-sparc-linux"
  44
  45 extern const bfd_target MY(vec);
  46
  47 /* We always generate QMAGIC files in preference to ZMAGIC files.  It
  48    would be possible to make this a linker option, if that ever
  49    becomes important.  */
  50
  51 static void MY_final_link_callback
  52   PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
  53
  54 static bfd_boolean sparclinux_bfd_final_link
  55   PARAMS ((bfd *abfd, struct bfd_link_info *info));
  56
  57 static bfd_boolean
  58 sparclinux_bfd_final_link (abfd, info)
  59      bfd *abfd;
  60      struct bfd_link_info *info;
  61 {
  62   obj_aout_subformat (abfd) = q_magic_format;
  63   return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
  64 }
  65
  66 #define MY_bfd_final_link sparclinux_bfd_final_link
  67
  68 /* Set the machine type correctly.  */
  69
  70 static bfd_boolean sparclinux_write_object_contents PARAMS ((bfd *abfd));
  71
  72 static bfd_boolean
  73 sparclinux_write_object_contents (abfd)
  74      bfd *abfd;
  75 {
  76   struct external_exec exec_bytes;
  77   struct internal_exec *execp = exec_hdr (abfd);
  78
  79   N_SET_MACHTYPE (*execp, M_SPARC);
  80
  81   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
  82
  83   WRITE_HEADERS(abfd, execp);
  84
  85   return TRUE;
  86 }
  87
  88 #define MY_write_object_contents sparclinux_write_object_contents
  89 /* Code to link against Linux a.out shared libraries.  */
  90
  91 /* See if a symbol name is a reference to the global offset table.  */
  92
  93 #ifndef GOT_REF_PREFIX
  94 #define GOT_REF_PREFIX  "__GOT_"
  95 #endif
  96
  97 #define IS_GOT_SYM(name)  (CONST_STRNEQ (name, GOT_REF_PREFIX))
  98
  99 /* See if a symbol name is a reference to the procedure linkage table.  */
 100
 101 #ifndef PLT_REF_PREFIX
 102 #define PLT_REF_PREFIX  "__PLT_"
 103 #endif
 104
 105 #define IS_PLT_SYM(name)  (CONST_STRNEQ (name, PLT_REF_PREFIX))
 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 dynamically
 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 bfd_boolean linux_link_create_dynamic_sections
 181   PARAMS ((bfd *, struct bfd_link_info *));
 182 static bfd_boolean linux_add_one_symbol
 183   PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *,
 184           bfd_vma, const char *, bfd_boolean, bfd_boolean,
 185           struct bfd_link_hash_entry **));
 186 static bfd_boolean linux_tally_symbols
 187   PARAMS ((struct linux_link_hash_entry *, PTR));
 188 static bfd_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   bfd_size_type amt = sizeof (struct linux_link_hash_table);
 229
 230   ret = (struct linux_link_hash_table *) bfd_malloc (amt);
 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                                         sizeof (struct linux_link_hash_entry)))
 236     {
 237       free (ret);
 238       return (struct bfd_link_hash_table *) NULL;
 239     }
 240
 241   ret->dynobj = NULL;
 242   ret->fixup_count = 0;
 243   ret->local_builtins = 0;
 244   ret->fixup_list = NULL;
 245
 246   return &ret->root.root;
 247 }
 248
 249 /* Look up an entry in a Linux link hash table.  */
 250
 251 #define linux_link_hash_lookup(table, string, create, copy, follow) \
 252   ((struct linux_link_hash_entry *) \
 253    aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\
 254                           (follow)))
 255
 256 /* Traverse a Linux link hash table.  */
 257
 258 #define linux_link_hash_traverse(table, func, info)                    \
 259   (aout_link_hash_traverse                                             \
 260    (&(table)->root,                                                    \
 261     (bfd_boolean (*) PARAMS ((struct aout_link_hash_entry *, PTR))) (func), \
 262     (info)))
 263
 264 /* Get the Linux link hash table from the info structure.  This is
 265    just a cast.  */
 266
 267 #define linux_hash_table(p) ((struct linux_link_hash_table *) ((p)->hash))
 268
 269 /* Store the information for a new fixup.  */
 270
 271 static struct fixup *
 272 new_fixup (info, h, value, builtin)
 273      struct bfd_link_info *info;
 274      struct linux_link_hash_entry *h;
 275      bfd_vma value;
 276      int builtin;
 277 {
 278   struct fixup *f;
 279
 280   f = (struct fixup *) bfd_hash_allocate (&info->hash->table,
 281                                           sizeof (struct fixup));
 282   if (f == NULL)
 283     return f;
 284   f->next = linux_hash_table (info)->fixup_list;
 285   linux_hash_table (info)->fixup_list = f;
 286   f->h = h;
 287   f->value = value;
 288   f->builtin = builtin;
 289   f->jump = 0;
 290   ++linux_hash_table (info)->fixup_count;
 291   return f;
 292 }
 293
 294 /* We come here once we realize that we are going to link to a shared
 295    library.  We need to create a special section that contains the
 296    fixup table, and we ultimately need to add a pointer to this into
 297    the set vector for SHARABLE_CONFLICTS.  At this point we do not
 298    know the size of the section, but that's OK - we just need to
 299    create it for now.  */
 300
 301 static bfd_boolean
 302 linux_link_create_dynamic_sections (abfd, info)
 303      bfd *abfd;
 304      struct bfd_link_info *info ATTRIBUTE_UNUSED;
 305 {
 306   flagword flags;
 307   register asection *s;
 308
 309   /* Note that we set the SEC_IN_MEMORY flag.  */
 310   flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
 311
 312   /* We choose to use the name ".linux-dynamic" for the fixup table.
 313      Why not?  */
 314   s = bfd_make_section_with_flags (abfd, ".linux-dynamic", flags);
 315   if (s == NULL
 316       || ! bfd_set_section_alignment (abfd, s, 2))
 317     return FALSE;
 318   s->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 bfd_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      bfd_boolean copy;
 339      bfd_boolean collect;
 340      struct bfd_link_hash_entry **hashp;
 341 {
 342   struct linux_link_hash_entry *h;
 343   bfd_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->output_bfd->xvec?  We may
 350      want to be able to link Linux a.out and ELF objects together,
 351      but serious confusion is possible.  */
 352
 353   insert = FALSE;
 354
 355   if (! info->relocatable
 356       && linux_hash_table (info)->dynobj == NULL
 357       && strcmp (name, SHARABLE_CONFLICTS) == 0
 358       && (flags & BSF_CONSTRUCTOR) != 0
 359       && abfd->xvec == info->output_bfd->xvec)
 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->output_bfd->xvec)
 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, (bfd_vma) 0, NULL,
 411               FALSE, FALSE, NULL)))
 412         return FALSE;
 413     }
 414
 415   return TRUE;
 416 }
 417
 418 /* We will crawl the hash table and come here for every global symbol.
 419    We will examine each entry and see if there are indications that we
 420    need to add a fixup.  There are two possible cases - one is where
 421    you have duplicate definitions of PLT or GOT symbols - these will
 422    have already been caught and added as "builtin" fixups.  If we find
 423    that the corresponding non PLT/GOT symbol is also present, we
 424    convert it to a regular fixup instead.
 425
 426    This function is called via linux_link_hash_traverse.  */
 427
 428 static bfd_boolean
 429 linux_tally_symbols (struct linux_link_hash_entry *h, void * data)
 430 {
 431   struct bfd_link_info *info = (struct bfd_link_info *) data;
 432   struct fixup *f, *f1;
 433   int is_plt;
 434   struct linux_link_hash_entry *h1, *h2;
 435   bfd_boolean exists;
 436
 437   if (h->root.root.type == bfd_link_hash_warning)
 438     h = (struct linux_link_hash_entry *) h->root.root.u.i.link;
 439
 440   if (h->root.root.type == bfd_link_hash_undefined
 441       && CONST_STRNEQ (h->root.root.root.string, NEEDS_SHRLIB))
 442     {
 443       const char *name;
 444       char *p;
 445       char *alloc = NULL;
 446
 447       name = h->root.root.root.string + sizeof NEEDS_SHRLIB - 1;
 448       p = strrchr (name, '_');
 449       if (p != NULL)
 450         alloc = (char *) bfd_malloc ((bfd_size_type) strlen (name) + 1);
 451
 452       if (p == NULL || alloc == NULL)
 453         (*_bfd_error_handler) (_("Output file requires shared library `%s'\n"),
 454                                name);
 455       else
 456         {
 457           strcpy (alloc, name);
 458           p = strrchr (alloc, '_');
 459           *p++ = '\0';
 460           (*_bfd_error_handler)
 461             (_("Output file requires shared library `%s.so.%s'\n"),
 462              alloc, p);
 463           free (alloc);
 464         }
 465
 466       abort ();
 467     }
 468
 469   /* If this symbol is not a PLT/GOT, we do not even need to look at
 470      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 bfd_boolean
 554 bfd_sparclinux_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->size = linux_hash_table (info)->fixup_count + 1;
 595       s->size *= 8;
 596       s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->size);
 597       if (s->contents == NULL)
 598         return FALSE;
 599     }
 600
 601   return TRUE;
 602 }
 603
 604 /* We come here once we are ready to actually write the fixup table to
 605    the output file.  Scan the fixup tables and so forth and generate
 606    the stuff we need.  */
 607
 608 static bfd_boolean
 609 linux_finish_dynamic_link (output_bfd, info)
 610      bfd *output_bfd;
 611      struct bfd_link_info *info;
 612 {
 613   asection *s, *os, *is;
 614   bfd_byte *fixup_table;
 615   struct linux_link_hash_entry *h;
 616   struct fixup *f;
 617   unsigned int new_addr;
 618   int section_offset;
 619   unsigned int fixups_written;
 620
 621   if (linux_hash_table (info)->dynobj == NULL)
 622     return TRUE;
 623
 624   s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
 625                                ".linux-dynamic");
 626   BFD_ASSERT (s != NULL);
 627   os = s->output_section;
 628   fixups_written = 0;
 629
 630 #ifdef LINUX_LINK_DEBUG
 631   printf ("Fixup table file offset: %x  VMA: %x\n",
 632           os->filepos + s->output_offset,
 633           os->vma + s->output_offset);
 634 #endif
 635
 636   fixup_table = s->contents;
 637   bfd_put_32 (output_bfd,
 638               (bfd_vma) linux_hash_table (info)->fixup_count, fixup_table);
 639   fixup_table += 4;
 640
 641   /* Fill in fixup table.  */
 642   for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
 643     {
 644       if (f->builtin)
 645         continue;
 646
 647       if (f->h->root.root.type != bfd_link_hash_defined
 648           && f->h->root.root.type != bfd_link_hash_defweak)
 649         {
 650           (*_bfd_error_handler)
 651             (_("Symbol %s not defined for fixups\n"),
 652              f->h->root.root.root.string);
 653           continue;
 654         }
 655
 656       is = f->h->root.root.u.def.section;
 657       section_offset = is->output_section->vma + is->output_offset;
 658       new_addr = f->h->root.root.u.def.value + section_offset;
 659
 660 #ifdef LINUX_LINK_DEBUG
 661       printf ("Fixup(%d) %s: %x %x\n",f->jump, f->h->root.root.string,
 662               new_addr, f->value);
 663 #endif
 664
 665       if (f->jump)
 666         {
 667           /* Relative address */
 668           new_addr = new_addr - (f->value + 5);
 669           bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
 670           fixup_table += 4;
 671           bfd_put_32 (output_bfd, f->value + 1, fixup_table);
 672           fixup_table += 4;
 673         }
 674       else
 675         {
 676           bfd_put_32 (output_bfd, (bfd_vma) 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, (bfd_vma) 0, fixup_table);
 688       fixup_table += 4;
 689       bfd_put_32 (output_bfd, (bfd_vma) 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, (bfd_vma) 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, (bfd_vma) 0, fixup_table);
 729           fixup_table += 4;
 730           bfd_put_32 (output_bfd, (bfd_vma) 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, (bfd_vma) new_addr, fixup_table);
 753     }
 754   else
 755     bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
 756
 757   if (bfd_seek (output_bfd, (file_ptr) (os->filepos + s->output_offset),
 758                 SEEK_SET) != 0)
 759     return FALSE;
 760
 761   if (bfd_bwrite ((PTR) s->contents, s->size, output_bfd) != s->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"