bfd/aout-adobe.c

   1 /* BFD back-end for a.out.adobe binaries.
   2    Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
   3    Written by Cygnus Support.  Based on bout.c.
   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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24
  25 #include "aout/adobe.h"
  26
  27 #include "aout/stab_gnu.h"
  28 #include "libaout.h"            /* BFD a.out internal data structures */
  29
  30 extern bfd_target a_out_adobe_vec;              /* Forward decl */
  31
  32 PROTO (static bfd_target *, aout_adobe_callback, (bfd *));
  33
  34 PROTO (boolean, aout_32_slurp_symbol_table, (bfd *abfd));
  35 PROTO (boolean , aout_32_write_syms, ());
  36 PROTO (static void, aout_adobe_write_section, (bfd *abfd, sec_ptr sect));
  37
  38 /* Swaps the information in an executable header taken from a raw byte
  39    stream memory image, into the internal exec_header structure.  */
  40
  41 PROTO(void, aout_adobe_swap_exec_header_in,
  42       (bfd *abfd,
  43       struct external_exec *raw_bytes,
  44       struct internal_exec *execp));
  45
  46 void
  47 aout_adobe_swap_exec_header_in (abfd, raw_bytes, execp)
  48      bfd *abfd;
  49      struct external_exec *raw_bytes;
  50      struct internal_exec *execp;
  51 {
  52   struct external_exec *bytes = (struct external_exec *)raw_bytes;
  53
  54   /* Now fill in fields in the execp, from the bytes in the raw data.  */
  55   execp->a_info   = bfd_h_get_32 (abfd, bytes->e_info);
  56   execp->a_text   = GET_WORD (abfd, bytes->e_text);
  57   execp->a_data   = GET_WORD (abfd, bytes->e_data);
  58   execp->a_bss    = GET_WORD (abfd, bytes->e_bss);
  59   execp->a_syms   = GET_WORD (abfd, bytes->e_syms);
  60   execp->a_entry  = GET_WORD (abfd, bytes->e_entry);
  61   execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
  62   execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
  63 }
  64
  65 /* Swaps the information in an internal exec header structure into the
  66    supplied buffer ready for writing to disk.  */
  67
  68 PROTO(void, aout_adobe_swap_exec_header_out,
  69           (bfd *abfd,
  70            struct internal_exec *execp,
  71            struct external_exec *raw_bytes));
  72 void
  73 aout_adobe_swap_exec_header_out (abfd, execp, raw_bytes)
  74      bfd *abfd;
  75      struct internal_exec *execp;
  76      struct external_exec *raw_bytes;
  77 {
  78   struct external_exec *bytes = (struct external_exec *)raw_bytes;
  79
  80   /* Now fill in fields in the raw data, from the fields in the exec struct. */
  81   bfd_h_put_32 (abfd, execp->a_info  , bytes->e_info);
  82   PUT_WORD (abfd, execp->a_text  , bytes->e_text);
  83   PUT_WORD (abfd, execp->a_data  , bytes->e_data);
  84   PUT_WORD (abfd, execp->a_bss   , bytes->e_bss);
  85   PUT_WORD (abfd, execp->a_syms  , bytes->e_syms);
  86   PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
  87   PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
  88   PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
  89 }
  90
  91
  92 static bfd_target *
  93 aout_adobe_object_p (abfd)
  94      bfd *abfd;
  95 {
  96   struct internal_exec anexec;
  97   struct external_exec exec_bytes;
  98   char *targ;
  99
 100   if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
 101       != EXEC_BYTES_SIZE) {
 102     if (bfd_get_error () != bfd_error_system_call)
 103       bfd_set_error (bfd_error_wrong_format);
 104     return 0;
 105   }
 106
 107   anexec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
 108
 109   /* Normally we just compare for the magic number.
 110      However, a bunch of Adobe tools aren't fixed up yet; they generate
 111      files using ZMAGIC(!).
 112      If the environment variable GNUTARGET is set to "a.out.adobe", we will
 113      take just about any a.out file as an Adobe a.out file.  FIXME!  */
 114
 115   if (N_BADMAG (anexec)) {
 116     extern char *getenv ();
 117
 118     targ = getenv ("GNUTARGET");
 119     if (targ && !strcmp (targ, a_out_adobe_vec.name))
 120       ;         /* Just continue anyway, if specifically set to this format */
 121     else
 122       {
 123         bfd_set_error (bfd_error_wrong_format);
 124         return 0;
 125       }
 126   }
 127
 128   aout_adobe_swap_exec_header_in (abfd, &exec_bytes, &anexec);
 129   return aout_32_some_aout_object_p (abfd, &anexec, aout_adobe_callback);
 130 }
 131
 132
 133 /* Finish up the opening of a b.out file for reading.  Fill in all the
 134    fields that are not handled by common code.  */
 135
 136 static bfd_target *
 137 aout_adobe_callback (abfd)
 138      bfd *abfd;
 139 {
 140   struct internal_exec *execp = exec_hdr (abfd);
 141   asection *sect;
 142   struct external_segdesc ext[1];
 143   char *section_name;
 144   char try_again[30];   /* name and number */
 145   char *newname;
 146   int trynum;
 147   flagword flags;
 148
 149   /* Architecture and machine type -- unknown in this format.  */
 150   bfd_set_arch_mach(abfd, bfd_arch_unknown, 0);
 151
 152   /* The positions of the string table and symbol table.  */
 153   obj_str_filepos (abfd) = N_STROFF (*execp);
 154   obj_sym_filepos (abfd) = N_SYMOFF (*execp);
 155
 156   /* Suck up the section information from the file, one section at a time.  */
 157
 158   for (;;) {
 159     if (bfd_read ((PTR) ext, 1, sizeof (*ext), abfd) != sizeof (*ext)) {
 160       if (bfd_get_error () != bfd_error_system_call)
 161         bfd_set_error (bfd_error_wrong_format);
 162       return 0;
 163     }
 164     switch (ext->e_type[0]) {
 165     case N_TEXT:
 166       section_name = ".text";
 167       flags = SEC_CODE | SEC_LOAD | SEC_ALLOC | SEC_HAS_CONTENTS;
 168       break;
 169
 170     case N_DATA:
 171       section_name = ".data";
 172       flags = SEC_DATA | SEC_LOAD | SEC_ALLOC | SEC_HAS_CONTENTS;
 173       break;
 174
 175     case N_BSS:
 176       section_name = ".bss";
 177       flags = SEC_DATA | SEC_HAS_CONTENTS;
 178       break;
 179
 180     case 0:
 181       goto no_more_sections;
 182
 183     default:
 184       fprintf (stderr, "Unknown section type in a.out.adobe file: %x\n",
 185                ext->e_type[0]);
 186       goto no_more_sections;
 187     }
 188
 189     /* First one is called ".text" or whatever; subsequent ones are
 190        ".text1", ".text2", ... */
 191
 192     bfd_set_error (bfd_error_no_error);
 193     sect = bfd_make_section (abfd, section_name);
 194     trynum = 0;
 195     while (!sect) {
 196       if (bfd_get_error () != bfd_error_no_error)
 197         return 0;       /* Some other error -- slide into the sunset */
 198       sprintf (try_again, "%s%d", section_name, ++trynum);
 199       sect = bfd_make_section (abfd, try_again);
 200     }
 201
 202     /* Fix the name, if it is a sprintf'd name.  */
 203     if (sect->name == try_again) {
 204       newname = (char *) bfd_zalloc(abfd, strlen (sect->name));
 205       if (newname == NULL) {
 206         bfd_set_error (bfd_error_no_memory);
 207         return 0;
 208       }
 209       strcpy (newname, sect->name);
 210       sect->name = newname;
 211     }
 212
 213     /* Now set the section's attributes.  */
 214     bfd_set_section_flags (abfd, sect, flags);
 215     sect->_raw_size = ((ext->e_size[0] << 8)    /* Assumed big-endian */
 216                       | ext->e_size[1] << 8)
 217                       | ext->e_size[2];
 218     sect->_cooked_size = sect->_raw_size;
 219     sect->vma = bfd_h_get_32 (abfd, ext->e_virtbase);
 220     sect->filepos = bfd_h_get_32 (abfd, ext->e_filebase);
 221     /* FIXME XXX alignment? */
 222
 223     /* Set relocation information for first section of each type.  */
 224     if (trynum == 0) switch (ext->e_type[0]) {
 225     case N_TEXT:
 226       sect->rel_filepos = N_TRELOFF (*execp);
 227       sect->reloc_count = execp->a_trsize;
 228       break;
 229
 230     case N_DATA:
 231       sect->rel_filepos = N_DRELOFF (*execp);
 232       sect->reloc_count = execp->a_drsize;
 233       break;
 234     }
 235   }
 236 no_more_sections:
 237
 238   adata(abfd).reloc_entry_size = sizeof (struct reloc_std_external);
 239   adata(abfd).symbol_entry_size = sizeof (struct external_nlist);
 240   adata(abfd).page_size = 1; /* Not applicable. */
 241   adata(abfd).segment_size = 1; /* Not applicable. */
 242   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 243
 244   return abfd->xvec;
 245 }
 246
 247 struct bout_data_struct {
 248     struct aoutdata a;
 249     struct internal_exec e;
 250 };
 251
 252 static boolean
 253 aout_adobe_mkobject (abfd)
 254      bfd *abfd;
 255 {
 256   struct bout_data_struct *rawptr;
 257
 258   rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct));
 259   if (rawptr == NULL) {
 260       bfd_set_error (bfd_error_no_memory);
 261       return false;
 262     }
 263
 264   abfd->tdata.bout_data = rawptr;
 265   exec_hdr (abfd) = &rawptr->e;
 266
 267   adata(abfd).reloc_entry_size = sizeof (struct reloc_std_external);
 268   adata(abfd).symbol_entry_size = sizeof (struct external_nlist);
 269   adata(abfd).page_size = 1; /* Not applicable. */
 270   adata(abfd).segment_size = 1; /* Not applicable. */
 271   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 272
 273   return true;
 274 }
 275
 276
 277 static boolean
 278 aout_adobe_write_object_contents (abfd)
 279      bfd *abfd;
 280 {
 281   struct external_exec swapped_hdr;
 282   static struct external_segdesc sentinel[1];   /* Initialized to zero */
 283   asection *sect;
 284
 285   exec_hdr (abfd)->a_info = ZMAGIC;
 286
 287   /* Calculate text size as total of text sections, etc. */
 288
 289   exec_hdr (abfd)->a_text = 0;
 290   exec_hdr (abfd)->a_data = 0;
 291   exec_hdr (abfd)->a_bss  = 0;
 292   exec_hdr (abfd)->a_trsize = 0;
 293   exec_hdr (abfd)->a_drsize = 0;
 294
 295   for (sect = abfd->sections; sect; sect = sect->next) {
 296     if (sect->flags & SEC_CODE) {
 297       exec_hdr (abfd)->a_text += sect->_raw_size;
 298       exec_hdr (abfd)->a_trsize += sect->reloc_count *
 299                                    sizeof (struct reloc_std_external);
 300     } else if (sect->flags & SEC_DATA)  {
 301       exec_hdr (abfd)->a_data += sect->_raw_size;
 302       exec_hdr (abfd)->a_drsize += sect->reloc_count *
 303                                    sizeof (struct reloc_std_external);
 304     } else if (sect->flags & SEC_ALLOC && !(sect->flags & SEC_LOAD)) {
 305       exec_hdr (abfd)->a_bss  += sect->_raw_size;
 306     }
 307   }
 308
 309   exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd)
 310                                 * sizeof (struct external_nlist);
 311   exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
 312
 313   aout_adobe_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
 314
 315   if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
 316       || (bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd)
 317           != EXEC_BYTES_SIZE))
 318     return false;
 319
 320   /* Now write out the section information.  Text first, data next, rest
 321      afterward.  */
 322
 323   for (sect = abfd->sections; sect; sect = sect->next) {
 324     if (sect->flags & SEC_CODE) {
 325       aout_adobe_write_section (abfd, sect);
 326     }
 327   }
 328   for (sect = abfd->sections; sect; sect = sect->next) {
 329     if (sect->flags & SEC_DATA) {
 330       aout_adobe_write_section (abfd, sect);
 331     }
 332   }
 333   for (sect = abfd->sections; sect; sect = sect->next) {
 334     if (!(sect->flags & (SEC_CODE|SEC_DATA))) {
 335       aout_adobe_write_section (abfd, sect);
 336     }
 337   }
 338
 339   /* Write final `sentinel` section header (with type of 0).  */
 340   if (bfd_write ((PTR) sentinel, 1, sizeof (*sentinel), abfd)
 341       != sizeof (*sentinel))
 342     return false;
 343
 344   /* Now write out reloc info, followed by syms and strings */
 345   if (bfd_get_symcount (abfd) != 0)
 346     {
 347       if (bfd_seek (abfd, (file_ptr)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET)
 348           != 0)
 349         return false;
 350
 351       if (! aout_32_write_syms (abfd))
 352         return false;
 353
 354       if (bfd_seek (abfd, (file_ptr)(N_TRELOFF(*exec_hdr(abfd))), SEEK_SET)
 355           != 0)
 356         return false;
 357
 358       for (sect = abfd->sections; sect; sect = sect->next) {
 359         if (sect->flags & SEC_CODE)     {
 360           if (!aout_32_squirt_out_relocs (abfd, sect))
 361             return false;
 362         }
 363       }
 364
 365       if (bfd_seek (abfd, (file_ptr)(N_DRELOFF(*exec_hdr(abfd))), SEEK_SET)
 366           != 0)
 367         return false;
 368
 369       for (sect = abfd->sections; sect; sect = sect->next) {
 370         if (sect->flags & SEC_DATA)     {
 371           if (!aout_32_squirt_out_relocs (abfd, sect))
 372             return false;
 373         }
 374       }
 375     }
 376   return true;
 377 }
 378
 379 static void
 380 aout_adobe_write_section (abfd, sect)
 381      bfd *abfd;
 382      sec_ptr sect;
 383 {
 384   /* FIXME XXX */
 385 }
 386 \f
 387 static boolean
 388 aout_adobe_set_section_contents (abfd, section, location, offset, count)
 389      bfd *abfd;
 390      sec_ptr section;
 391      unsigned char *location;
 392      file_ptr offset;
 393       int count;
 394 {
 395   file_ptr section_start;
 396   sec_ptr sect;
 397
 398   if (abfd->output_has_begun == false) { /* set by bfd.c handler */
 399
 400     /* Assign file offsets to sections.  Text sections are first, and
 401        are contiguous.  Then data sections.  Everything else at the end.  */
 402
 403     section_start = N_TXTOFF (ignore<-->me);
 404
 405     for (sect = abfd->sections; sect; sect = sect->next) {
 406       if (sect->flags & SEC_CODE)       {
 407         sect->filepos = section_start;
 408         /* FIXME:  Round to alignment */
 409         section_start += sect->_raw_size;
 410       }
 411     }
 412
 413     for (sect = abfd->sections; sect; sect = sect->next) {
 414       if (sect->flags & SEC_DATA)       {
 415         sect->filepos = section_start;
 416         /* FIXME:  Round to alignment */
 417         section_start += sect->_raw_size;
 418       }
 419     }
 420
 421     for (sect = abfd->sections; sect; sect = sect->next) {
 422       if (sect->flags & SEC_HAS_CONTENTS &&
 423           !(sect->flags & (SEC_CODE|SEC_DATA))) {
 424         sect->filepos = section_start;
 425         /* FIXME:  Round to alignment */
 426         section_start += sect->_raw_size;
 427       }
 428     }
 429   }
 430
 431   /* regardless, once we know what we're doing, we might as well get going */
 432   if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
 433     return false;
 434
 435   if (count != 0) {
 436     return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false;
 437   }
 438   return true;
 439 }
 440
 441 static boolean
 442 aout_adobe_set_arch_mach (abfd, arch, machine)
 443      bfd *abfd;
 444      enum bfd_architecture arch;
 445      unsigned long machine;
 446 {
 447   bfd_default_set_arch_mach(abfd, arch, machine);
 448
 449   if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */
 450     return true;
 451
 452   return false;
 453 }
 454
 455 static int
 456 aout_adobe_sizeof_headers (ignore_abfd, ignore)
 457      bfd *ignore_abfd;
 458      boolean ignore;
 459 {
 460   return sizeof(struct internal_exec);
 461 }
 462
 463
 464
 465
 466 /* Build the transfer vector for Adobe A.Out files.  */
 467
 468 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
 469
 470 #define aout_32_bfd_make_debug_symbol \
 471   ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
 472
 473 #define aout_32_bfd_reloc_type_lookup \
 474   ((CONST struct reloc_howto_struct *(*) \
 475     PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
 476
 477 #define aout_32_set_arch_mach           aout_adobe_set_arch_mach
 478 #define aout_32_set_section_contents    aout_adobe_set_section_contents
 479
 480 #define aout_32_sizeof_headers          aout_adobe_sizeof_headers
 481 #define aout_32_bfd_get_relocated_section_contents \
 482   bfd_generic_get_relocated_section_contents
 483 #define aout_32_bfd_relax_section       bfd_generic_relax_section
 484 #define aout_32_bfd_link_hash_table_create \
 485   _bfd_generic_link_hash_table_create
 486 #define aout_32_bfd_link_add_symbols    _bfd_generic_link_add_symbols
 487 #define aout_32_bfd_final_link          _bfd_generic_final_link
 488
 489 bfd_target a_out_adobe_vec =
 490 {
 491   "a.out.adobe",                /* name */
 492   bfd_target_aout_flavour,
 493   true,                         /* data byte order is unknown (big assumed) */
 494   true,                         /* hdr byte order is big */
 495   (HAS_RELOC | EXEC_P |         /* object flags */
 496    HAS_LINENO | HAS_DEBUG |
 497    HAS_SYMS | HAS_LOCALS | WP_TEXT ),
 498   /* section flags */
 499   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_DATA | SEC_RELOC),
 500   '_',                          /*  symbol leading char */
 501   ' ',                          /* ar_pad_char */
 502   16,                           /* ar_max_namelen */
 503   2,                            /* minumum alignment power */
 504
 505   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 506      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 507      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
 508   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 509      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 510      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
 511  {_bfd_dummy_target, aout_adobe_object_p, /* bfd_check_format */
 512    bfd_generic_archive_p, _bfd_dummy_target},
 513  {bfd_false, aout_adobe_mkobject, /* bfd_set_format */
 514    _bfd_generic_mkarchive, bfd_false},
 515  {bfd_false, aout_adobe_write_object_contents, /* bfd_write_contents */
 516    _bfd_write_archive_contents, bfd_false},
 517
 518      BFD_JUMP_TABLE_GENERIC (aout_32),
 519      BFD_JUMP_TABLE_COPY (_bfd_generic),
 520      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 521      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
 522      BFD_JUMP_TABLE_SYMBOLS (aout_32),
 523      BFD_JUMP_TABLE_RELOCS (aout_32),
 524      BFD_JUMP_TABLE_WRITE (aout_32),
 525      BFD_JUMP_TABLE_LINK (aout_32),
 526      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 527
 528   (PTR) 0
 529 };