bfd/bout.c

   1 /* BFD back-end for i960 b.out binaries */
   2
   3 /* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
   4
   5 This file is part of BFD, the Binary File Diddler.
   6
   7 BFD 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 1, or (at your option)
  10 any later version.
  11
  12 BFD 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 BFD; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 /* $Id$ */
  22
  23 #include <sysdep.h>
  24 #include "bfd.h"
  25 #include "libbfd.h"
  26
  27
  28 #include "bout.h"
  29
  30
  31 #include "stab.gnu.h"
  32 #include "liba.out.h"           /* BFD a.out internal data structures */
  33 #include "archures.h"
  34
  35 /* Align an address by rounding it up to a power of two.  It leaves the
  36    address unchanged if align == 0 (2^0 = alignment of 1 byte) */
  37 #define i960_align(addr, align) \
  38         ( ((addr) + ((1<<(align))-1)) & (-1 << (align)))
  39
  40 extern uint64_type _do_getl64 (), _do_getb64 ();
  41 extern uint32_type _do_getl32 (), _do_getb32 ();
  42 extern uint16_type _do_getl16 (), _do_getb16 ();
  43 extern void _do_putl64 (), _do_putb64 ();
  44 extern void _do_putl32 (), _do_putb32 ();
  45 extern void _do_putl16 (), _do_putb16 ();
  46
  47
  48 PROTO (static boolean, b_out_squirt_out_relocs,(bfd *abfd, asection *section));
  49 PROTO (static bfd_target *, b_out_callback, (bfd *));
  50
  51 PROTO (boolean, aout_slurp_symbol_table, (bfd *abfd));
  52 PROTO (void , aout_write_syms, ());
  53
  54 PROTO (static void, swap_exec_header, (bfd *abfd, struct exec *execp));
  55
  56 static bfd_target *
  57 b_out_little_object_p (abfd)
  58      bfd *abfd;
  59 {
  60   unsigned char magicbytes[LONG_SIZE];
  61   struct exec anexec;
  62
  63   if (bfd_read ((PTR)magicbytes, 1, LONG_SIZE, abfd) != LONG_SIZE) {
  64     bfd_error = system_call_error;
  65     return 0;
  66   }
  67   anexec.a_magic = _do_getl32 (magicbytes);
  68
  69   if (N_BADMAG (anexec)) {
  70     bfd_error = wrong_format;
  71     return 0;
  72   }
  73   return some_aout_object_p (abfd, b_out_callback);
  74 }
  75
  76 static bfd_target *
  77 b_out_big_object_p (abfd)
  78      bfd *abfd;
  79 {
  80   unsigned char magicbytes[LONG_SIZE];
  81   struct exec anexec;
  82
  83   if (bfd_read ((PTR)magicbytes, 1, LONG_SIZE, abfd) != LONG_SIZE) {
  84     bfd_error = system_call_error;
  85     return 0;
  86   }
  87
  88   anexec.a_magic = _do_getb32 (magicbytes);
  89
  90   if (N_BADMAG (anexec)) {
  91     bfd_error = wrong_format;
  92     return 0;
  93   }
  94   return some_aout_object_p (abfd, b_out_callback);
  95 }
  96
  97 /* Finish up the opening of a b.out file for reading.  Fill in all the
  98    fields that are not handled by common code.  */
  99
 100 static bfd_target *
 101 b_out_callback (abfd)
 102      bfd *abfd;
 103 {
 104   struct exec anexec;
 105   struct exec *execp = &anexec;
 106   unsigned long bss_start;
 107
 108   /* Reread the exec header, because the common code didn't get all of
 109      our extended header.  */
 110
 111   if (bfd_seek (abfd, 0L, SEEK_SET) < 0) {
 112     bfd_error = system_call_error;
 113     return 0;
 114   }
 115
 116   /* FIXME, needs to be hacked for character array read-in ala sunos.c.  */
 117   if (bfd_read ((PTR) execp, 1, sizeof (struct exec), abfd)
 118       != sizeof (struct exec)) {
 119     bfd_error = wrong_format;
 120     return 0;
 121   }
 122
 123   swap_exec_header (abfd, execp);
 124
 125   /* Architecture and machine type */
 126   abfd->obj_arch = bfd_arch_i960;       /* B.out only used on i960 */
 127   abfd->obj_machine = bfd_mach_i960_core;       /* Default */
 128 /* FIXME:  Set real machine type from file here */
 129
 130   /* The positions of the string table and symbol table.  */
 131   obj_str_filepos (abfd) = N_STROFF (anexec);
 132   obj_sym_filepos (abfd) = N_SYMOFF (anexec);
 133
 134   /* The alignments of the sections */
 135   obj_textsec (abfd)->alignment_power = execp->a_talign;
 136   obj_datasec (abfd)->alignment_power = execp->a_dalign;
 137   obj_bsssec  (abfd)->alignment_power = execp->a_balign;
 138
 139   /* The starting addresses of the sections.  */
 140   obj_textsec (abfd)->vma = anexec.a_tload;
 141   obj_datasec (abfd)->vma = anexec.a_dload;
 142   bss_start = anexec.a_dload + anexec.a_data; /* BSS = end of data section */
 143   obj_bsssec (abfd)->vma = i960_align (bss_start, anexec.a_balign);
 144
 145   /* The file positions of the sections */
 146   obj_textsec (abfd)->filepos = N_TXTOFF(anexec);
 147   obj_datasec (abfd)->filepos = N_DATOFF(anexec);
 148
 149   /* The file positions of the relocation info */
 150   obj_textsec (abfd)->rel_filepos = N_TROFF(anexec);
 151   obj_datasec (abfd)->rel_filepos =  N_DROFF(anexec);
 152
 153   return abfd->xvec;
 154 }
 155
 156
 157 static boolean
 158 b_out_mkobject (abfd)
 159      bfd *abfd;
 160 {
 161   PTR  rawptr;
 162
 163   bfd_error = system_call_error;
 164
 165   /* Use an intermediate variable for clarity */
 166   rawptr = (PTR) zalloc (sizeof (struct aoutdata) + sizeof (struct exec));
 167
 168   if (rawptr == (PTR)NULL) {
 169     bfd_error = no_memory;
 170     return false;
 171   }
 172
 173   set_tdata(abfd, (struct aoutdata *) rawptr);
 174   exec_hdr (abfd) = (struct exec *) ( (char*)rawptr + sizeof (struct aoutdata));
 175
 176   /* For simplicity's sake we just make all the sections right here. */
 177   obj_textsec (abfd) = (asection *)NULL;
 178   obj_datasec (abfd) = (asection *)NULL;
 179   obj_bsssec (abfd) = (asection *)NULL;
 180
 181   bfd_make_section (abfd, ".text");
 182   bfd_make_section (abfd, ".data");
 183   bfd_make_section (abfd, ".bss");
 184
 185   return true;
 186 }
 187
 188 static boolean
 189 b_out_write_object_contents (abfd)
 190      bfd *abfd;
 191 {
 192   struct exec swapped_hdr;
 193
 194   exec_hdr (abfd)->a_magic = BMAGIC;
 195
 196   exec_hdr (abfd)->a_text = obj_textsec (abfd)->size;
 197   exec_hdr (abfd)->a_data = obj_datasec (abfd)->size;
 198   exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->size;
 199   exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
 200   exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
 201   exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
 202                                sizeof (struct relocation_info));
 203   exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
 204                                sizeof (struct relocation_info));
 205
 206   exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
 207   exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
 208   exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
 209
 210   exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
 211   exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
 212
 213   /* FIXME, turn the header into bytes here, to avoid problems with
 214      sizes and alignments of its fields.  */
 215   swapped_hdr = *exec_hdr(abfd);
 216   swap_exec_header (abfd, &swapped_hdr);
 217
 218   bfd_seek (abfd, 0L, SEEK_SET);
 219   bfd_write ((PTR) &swapped_hdr, 1, sizeof (struct exec), abfd);
 220
 221   /* Now write out reloc info, followed by syms and strings */
 222   if (bfd_get_symcount (abfd) != 0)
 223     {
 224       bfd_seek (abfd,
 225                 (long)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET);
 226
 227       aout_write_syms (abfd);
 228
 229       bfd_seek (abfd,   (long)(N_TROFF(*exec_hdr(abfd))), SEEK_SET);
 230
 231       if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
 232       bfd_seek (abfd, (long)(N_DROFF(*exec_hdr(abfd))), SEEK_SET);
 233
 234       if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
 235     }
 236   return true;
 237 }
 238
 239 static void
 240 swap_exec_header (abfd, execp)
 241      bfd *abfd;
 242      struct exec *execp;
 243 {
 244 #define swapme(field)   field = bfd_h_get_32 (abfd, (unsigned char *)&field);
 245   swapme (execp->a_magic);
 246   swapme (execp->a_text);
 247   swapme (execp->a_data);
 248   swapme (execp->a_bss);
 249   swapme (execp->a_syms);
 250   swapme (execp->a_entry);
 251   swapme (execp->a_trsize);
 252   swapme (execp->a_drsize);
 253   swapme (execp->a_tload);
 254   swapme (execp->a_dload);
 255   /* talign, dalign, and balign are one-byte fields and don't swap.  */
 256 #undef swapme
 257 }
 258 \f
 259 /** Some reloc hackery */
 260
 261 #define CALLS    0x66003800     /* Template for 'calls' instruction     */
 262 #define BAL      0x0b000000     /* Template for 'bal' instruction       */
 263 #define BAL_MASK 0x00ffffff
 264
 265 static bfd_reloc_status_enum_type
 266 callj_callback(abfd, reloc_entry, symbol_in, data, input_section)
 267 bfd *abfd;
 268 arelent *reloc_entry;
 269 asymbol *symbol_in;
 270 unsigned char *data;
 271 asection *input_section;
 272 {
 273   int  word = bfd_get_32(abfd, data+reloc_entry->address);
 274   aout_symbol_type  *symbol = aout_symbol(symbol_in);
 275
 276   if (IS_OTHER(symbol->other)) {
 277     /* Call to a system procedure - replace code with system
 278        procedure number
 279        */
 280
 281     word = CALLS | (symbol->other - 1);
 282     bfd_put_32(abfd, word,  data+reloc_entry->address); /* replace */
 283     return bfd_reloc_ok;
 284   }
 285
 286   if (IS_CALLNAME(symbol->other)) {
 287     aout_symbol_type *balsym = symbol+1;
 288     /* The next symbol should be an N_BALNAME */
 289     BFD_ASSERT(IS_BALNAME(balsym->other));
 290
 291     /* We are calling a leaf - so replace the call instruction
 292        with a bal */
 293
 294     word = BAL |
 295       (((word & BAL_MASK) +
 296         balsym->symbol.section->output_offset +
 297         balsym->symbol.section->output_section->vma+
 298         balsym->symbol.value + reloc_entry->addend -
 299         ( input_section->output_section->vma + input_section->output_offset))
 300        & BAL_MASK);
 301
 302     bfd_put_32(abfd, word,  data+reloc_entry->address); /* replace */
 303     return bfd_reloc_ok;
 304   }
 305   return bfd_reloc_continue;
 306
 307 }
 308 /* type rshift size  bitsize    pcrel   bitpos  absolute overflow check*/
 309
 310
 311 static reloc_howto_type howto_reloc_callj =
 312 HOWTO( 3, 0, 2, 24, true, 0, true, true, callj_callback,"callj", true, 0x00ffffff, 0x00ffffff,false);
 313 static  reloc_howto_type howto_reloc_abs32 =
 314 HOWTO(1, 0, 2, 32, false, 0, true, true,0,"abs32", true, 0xffffffff,0xffffffff,false);
 315 static reloc_howto_type howto_reloc_pcrel24 =
 316 HOWTO(2, 0, 2, 24, true, 0, true, true,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
 317
 318 /* Allocate enough room for all the reloc entries, plus pointers to them all */
 319
 320 static boolean
 321 b_out_slurp_reloc_table (abfd, asect, symbols)
 322      bfd *abfd;
 323      sec_ptr asect;
 324      asymbol **symbols;
 325 {
 326   unsigned int count;
 327   size_t  reloc_size;
 328   struct relocation_info *relocs;
 329   arelent *reloc_cache;
 330
 331   if (asect->relocation) return true;
 332   if (!aout_slurp_symbol_table (abfd)) return false;
 333
 334   if (asect == obj_datasec (abfd)) {
 335     reloc_size = exec_hdr(abfd)->a_drsize;
 336     goto doit;
 337   }
 338
 339   if (asect == obj_textsec (abfd)) {
 340     reloc_size = exec_hdr(abfd)->a_trsize;
 341     goto doit;
 342   }
 343
 344   bfd_error = invalid_operation;
 345   return false;
 346
 347  doit:
 348   bfd_seek (abfd, (long)(asect->rel_filepos), SEEK_SET);
 349   count = reloc_size / sizeof (struct relocation_info);
 350
 351   relocs = (struct relocation_info *) malloc (reloc_size);
 352   if (!relocs) {
 353     bfd_error = no_memory;
 354     return false;
 355   }
 356   reloc_cache = (arelent *) malloc ((count+1) * sizeof (arelent));
 357   if (!reloc_cache) {
 358     free ((char*)relocs);
 359     bfd_error = no_memory;
 360     return false;
 361   }
 362
 363   if (bfd_read ((PTR) relocs, 1, reloc_size, abfd) != reloc_size) {
 364     bfd_error = system_call_error;
 365     free (reloc_cache);
 366     free (relocs);
 367     return false;
 368   }
 369
 370   {
 371     register struct relocation_info *rptr = relocs;
 372     unsigned int counter = 0;
 373     arelent *cache_ptr = reloc_cache;
 374     int extern_mask, pcrel_mask, callj_mask;
 375
 376     if (abfd->xvec->header_byteorder_big_p) {
 377       /* Big-endian bit field allocation order */
 378       pcrel_mask  = 0x80;
 379       extern_mask = 0x10;
 380       callj_mask  = 0x02;
 381     } else {
 382       /* Little-endian bit field allocation order */
 383       pcrel_mask  = 0x01;
 384       extern_mask = 0x08;
 385       callj_mask  = 0x40;
 386     }
 387
 388     for (; counter < count; counter++, rptr++, cache_ptr++)
 389       {
 390         unsigned char *raw = (unsigned char *)rptr;
 391         unsigned int symnum;
 392         cache_ptr->address = bfd_h_get_32 (abfd, raw + 0);
 393         if (abfd->xvec->header_byteorder_big_p) {
 394           symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6];
 395         } else {
 396           symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4];
 397         }
 398
 399         if (raw[7] & extern_mask) {
 400           /* If this is set then the r_index is a index into the symbol table;
 401            * if the bit is not set then r_index contains a section map.
 402            * We either fill in the sym entry with a pointer to the symbol,
 403            * or point to the correct section
 404            */
 405           cache_ptr->sym_ptr_ptr = symbols + symnum;
 406           cache_ptr->addend = 0;
 407           cache_ptr->section = (asection*)NULL;
 408         } else {
 409           /* In a.out symbols are relative to the beginning of the
 410            * file rather than sections ?
 411            * (look in translate_from_native_sym_flags)
 412            * The reloc entry addend has added to it the offset into the
 413            * file of the data, so subtract the base to make the reloc
 414            * section relative */
 415           cache_ptr->sym_ptr_ptr = (asymbol **)NULL;
 416           switch (symnum) {
 417           case N_TEXT:
 418           case N_TEXT | N_EXT:
 419             cache_ptr->section = obj_textsec(abfd);
 420             cache_ptr->addend = -obj_textsec(abfd)->vma;
 421             break;
 422           case N_DATA:
 423           case N_DATA | N_EXT:
 424             cache_ptr->section = obj_datasec(abfd);
 425             cache_ptr->addend = - obj_datasec(abfd)->vma;
 426             break;
 427           case N_BSS:
 428           case N_BSS | N_EXT:
 429             cache_ptr->section = obj_bsssec(abfd);
 430             cache_ptr->addend =  - obj_bsssec(abfd)->vma;
 431             break;
 432           case N_ABS:
 433           case N_ABS | N_EXT:
 434             BFD_ASSERT(0);
 435             break;
 436           default:
 437             BFD_ASSERT(0);
 438             break;
 439           }
 440
 441         }
 442
 443         /* The i960 only has a few relocation types:
 444            abs 32-bit and pcrel 24bit.   Except for callj's!  */
 445         if (raw[7] & callj_mask)
 446           cache_ptr->howto = &howto_reloc_callj;
 447         else if ( raw[7] & pcrel_mask)
 448           cache_ptr->howto = &howto_reloc_pcrel24;
 449         else
 450           cache_ptr->howto = &howto_reloc_abs32;
 451       }
 452   }
 453
 454   free (relocs);
 455   asect->relocation = reloc_cache;
 456   asect->reloc_count = count;
 457   return true;
 458 }
 459
 460
 461 static boolean
 462 b_out_squirt_out_relocs (abfd, section)
 463      bfd *abfd;
 464      asection *section;
 465 {
 466   arelent **generic;
 467
 468   unsigned int count = section->reloc_count;
 469   struct relocation_info *native, *natptr;
 470   size_t natsize = count * sizeof (struct relocation_info);
 471   int extern_mask, pcrel_mask,  len_2, callj_mask;
 472   if (count == 0) return true;
 473   generic   = section->orelocation;
 474   native = ((struct relocation_info *) malloc (natsize));
 475   if (!native) {
 476     bfd_error = no_memory;
 477     return false;
 478   }
 479
 480    if (abfd->xvec->header_byteorder_big_p) {
 481        /* Big-endian bit field allocation order */
 482        pcrel_mask  = 0x80;
 483        extern_mask = 0x10;
 484        len_2       = 0x40;
 485       callj_mask  = 0x02;
 486    } else {
 487        /* Little-endian bit field allocation order */
 488        pcrel_mask  = 0x01;
 489        extern_mask = 0x08;
 490        len_2       = 0x04;
 491       callj_mask  = 0x40;
 492    }
 493
 494   for (natptr = native; count > 0; --count, ++natptr, ++generic)
 495     {
 496       arelent *g = *generic;
 497       unsigned char *raw = (unsigned char *)natptr;
 498       unsigned int symnum;
 499
 500       bfd_h_put_32(abfd, g->address, raw);
 501       /* Find a type in the output format which matches the input howto -
 502        * at the moment we assume input format == output format FIXME!!
 503        */
 504       /* FIXME:  Need callj stuff here, and to check the howto entries to
 505          be sure they are real for this architecture.  */
 506       if (g->howto== &howto_reloc_callj) {
 507         raw[7] = callj_mask + pcrel_mask + len_2;
 508       }
 509       else if (g->howto == &howto_reloc_pcrel24) {
 510         raw[7] = pcrel_mask +len_2;
 511       }
 512       else {
 513         raw[7] = len_2;
 514       }
 515       if (g->sym_ptr_ptr != (asymbol **)NULL)
 516         {
 517           /* name clobbered by aout_write_syms to be symbol index*/
 518           if ((*(g->sym_ptr_ptr))->section) {
 519             /* replace the section offset into the addent */
 520             g->addend += (*(g->sym_ptr_ptr))->section->vma ;
 521           }
 522           symnum = stoi((*(g->sym_ptr_ptr))->name);
 523           raw[7] |= extern_mask;
 524           BFD_ASSERT(g->addend == 0);
 525         }
 526       else {
 527         if (g->section == (asection *)NULL) {
 528           symnum = N_ABS;
 529           BFD_ASSERT(0);
 530         }
 531         else  if(g->section->output_section == obj_textsec(abfd)) {
 532           symnum = N_TEXT;
 533           BFD_ASSERT(g->addend == 0);
 534         }
 535         else if (g->section->output_section == obj_datasec(abfd)) {
 536           symnum  = N_DATA;
 537           BFD_ASSERT(g->addend + obj_textsec(abfd)->size == 0);
 538         }
 539         else if (g->section->output_section == obj_bsssec(abfd)) {
 540           symnum = N_BSS;
 541           BFD_ASSERT(g->addend + obj_textsec(abfd)->size
 542             + obj_datasec(abfd)->size == 0);
 543
 544         }
 545         else {
 546           BFD_ASSERT(0);
 547         }
 548       }
 549       if (abfd->xvec->header_byteorder_big_p) {
 550         raw[4] = (unsigned char) (symnum >> 16);
 551         raw[5] = (unsigned char) (symnum >>  8);
 552         raw[6] = (unsigned char) (symnum      );
 553       } else {
 554         raw[6] = (unsigned char) (symnum >> 16);
 555         raw[5] = (unsigned char) (symnum >>  8);
 556         raw[4] = (unsigned char) (symnum      );
 557       }
 558     }
 559
 560   if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
 561     free((PTR)native);
 562     return false;
 563   }
 564   free ((PTR)native);
 565
 566   return true;
 567 }
 568
 569 /* This is stupid.  This function should be a boolean predicate */
 570 static unsigned int
 571 b_out_canonicalize_reloc (abfd, section, relptr, symbols)
 572      bfd *abfd;
 573      sec_ptr section;
 574      arelent **relptr;
 575      asymbol **symbols;
 576 {
 577   arelent *tblptr = section->relocation;
 578   unsigned int count = 0;
 579
 580  if (!(tblptr || b_out_slurp_reloc_table (abfd, section, symbols))) return 0;
 581   tblptr = section->relocation;
 582  if (!tblptr) return 0;
 583
 584   for (; count++ < section->reloc_count;)
 585     *relptr++ = tblptr++;
 586
 587   *relptr = 0;
 588
 589   return section->reloc_count;
 590 }
 591
 592 static unsigned int
 593 b_out_get_reloc_upper_bound (abfd, asect)
 594      bfd *abfd;
 595      sec_ptr asect;
 596 {
 597   if (bfd_get_format (abfd) != bfd_object) {
 598     bfd_error = invalid_operation;
 599     return 0;
 600   }
 601
 602   if (asect == obj_datasec (abfd))
 603     return (sizeof (arelent *) *
 604             ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info))
 605              +1));
 606
 607   if (asect == obj_textsec (abfd))
 608     return (sizeof (arelent *) *
 609             ((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info))
 610              +1));
 611
 612   bfd_error = invalid_operation;
 613   return 0;
 614 }
 615 \f
 616 static boolean
 617 b_out_set_section_contents (abfd, section, location, offset, count)
 618      bfd *abfd;
 619      sec_ptr section;
 620      unsigned char *location;
 621      file_ptr offset;
 622       int count;
 623 {
 624   if (abfd->output_has_begun == false) { /* set by bfd.c handler */
 625     if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL) /*||
 626         (obj_textsec (abfd)->size == 0) || (obj_datasec (abfd)->size == 0)*/) {
 627       bfd_error = invalid_operation;
 628       return false;
 629     }
 630
 631     obj_textsec (abfd)->filepos = sizeof(struct exec);
 632     obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos
 633                                 +  obj_textsec (abfd)->size;
 634
 635   }
 636   /* regardless, once we know what we're doing, we might as well get going */
 637   bfd_seek (abfd, section->filepos + offset, SEEK_SET);
 638
 639   if (count != 0) {
 640     return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false;
 641   }
 642   return false;
 643 }
 644
 645 static boolean
 646 b_out_set_arch_mach (abfd, arch, machine)
 647      bfd *abfd;
 648      enum bfd_architecture arch;
 649      unsigned long machine;
 650 {
 651   abfd->obj_arch = arch;
 652   abfd->obj_machine = machine;
 653   if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */
 654     return true;
 655   if (arch == bfd_arch_i960)    /* i960 default is OK */
 656     switch (machine) {
 657     case bfd_mach_i960_core:
 658     case bfd_mach_i960_kb_sb:
 659     case bfd_mach_i960_mc:
 660     case bfd_mach_i960_xa:
 661     case bfd_mach_i960_ca:
 662     case bfd_mach_i960_ka_sa:
 663       return true;
 664     default:
 665       return false;
 666     }
 667
 668   return false;
 669 }
 670
 671 static int
 672 DEFUN(b_out_sizeof_headers,(abfd, exec),
 673       bfd *abfd AND
 674       boolean execable)
 675 {
 676 return sizeof(struct exec);
 677 }
 678 \f
 679 /* Build the transfer vectors for Big and Little-Endian B.OUT files.  */
 680
 681 /* We don't have core files.  */
 682 #define aout_core_file_failing_command  _bfd_dummy_core_file_failing_command
 683 #define aout_core_file_failing_signal   _bfd_dummy_core_file_failing_signal
 684 #define aout_core_file_matches_executable_p     \
 685                                 _bfd_dummy_core_file_matches_executable_p
 686
 687 /* We use BSD-Unix generic archive files.  */
 688 #define aout_openr_next_archived_file   bfd_generic_openr_next_archived_file
 689 #define aout_generic_stat_arch_elt      bfd_generic_stat_arch_elt
 690 #define aout_slurp_armap                bfd_slurp_bsd_armap
 691 #define aout_slurp_extended_name_table  bfd_true
 692 #define aout_write_armap                bsd_write_armap
 693 #define aout_truncate_arname            bfd_bsd_truncate_arname
 694
 695 /* We override these routines from the usual a.out file routines.  */
 696 #define aout_canonicalize_reloc         b_out_canonicalize_reloc
 697 #define aout_get_reloc_upper_bound      b_out_get_reloc_upper_bound
 698 #define aout_set_section_contents       b_out_set_section_contents
 699 #define aout_set_arch_mach              b_out_set_arch_mach
 700 #define aout_sizeof_headers             b_out_sizeof_headers
 701
 702
 703 bfd_target b_out_vec_big_host =
 704 {
 705   "b.out.big",                  /* name */
 706   bfd_target_aout_flavour_enum,
 707   false,                        /* data byte order is little */
 708   true,                         /* hdr byte order is big */
 709   (HAS_RELOC | EXEC_P |         /* object flags */
 710    HAS_LINENO | HAS_DEBUG |
 711    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
 712   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 713   ' ',                          /* ar_pad_char */
 714   16,                           /* ar_max_namelen */
 715
 716
 717 _do_getl64, _do_putl64,  _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
 718 _do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
 719     {_bfd_dummy_target, b_out_big_object_p, /* bfd_check_format */
 720        bfd_generic_archive_p, _bfd_dummy_target},
 721     {bfd_false, b_out_mkobject, /* bfd_set_format */
 722        _bfd_generic_mkarchive, bfd_false},
 723     {bfd_false, b_out_write_object_contents,    /* bfd_write_contents */
 724        _bfd_write_archive_contents, bfd_false},
 725
 726   JUMP_TABLE(aout)
 727 };
 728
 729
 730 bfd_target b_out_vec_little_host =
 731 {
 732   "b.out.little",               /* name */
 733   bfd_target_aout_flavour_enum,
 734   false,                        /* data byte order is little */
 735   false,                        /* header byte order is little */
 736   (HAS_RELOC | EXEC_P |         /* object flags */
 737    HAS_LINENO | HAS_DEBUG |
 738    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
 739   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 740   ' ',                          /* ar_pad_char */
 741   16,                           /* ar_max_namelen */
 742
 743 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
 744 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* hdrs */
 745
 746     {_bfd_dummy_target, b_out_little_object_p, /* bfd_check_format */
 747        bfd_generic_archive_p, _bfd_dummy_target},
 748     {bfd_false, b_out_mkobject, /* bfd_set_format */
 749        _bfd_generic_mkarchive, bfd_false},
 750     {bfd_false, b_out_write_object_contents,    /* bfd_write_contents */
 751        _bfd_write_archive_contents, bfd_false},
 752   JUMP_TABLE(aout)
 753 };
 754