1/* BFD back-end for a.out.adobe binaries. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. Based on bout.c. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23#include "sysdep.h" 24#include "bfd.h" 25#include "libbfd.h" 26#include "aout/adobe.h" 27#include "aout/stab_gnu.h" 28#include "libaout.h" /* BFD a.out internal data structures. */ 29 30/* Forward decl. */ 31extern const bfd_target a_out_adobe_vec; 32 33/* Swaps the information in an executable header taken from a raw byte 34 stream memory image, into the internal exec_header structure. */ 35 36static void 37aout_adobe_swap_exec_header_in (bfd *abfd, 38 struct external_exec *bytes, 39 struct internal_exec *execp) 40{ 41 /* Now fill in fields in the execp, from the bytes in the raw data. */ 42 execp->a_info = H_GET_32 (abfd, bytes->e_info); 43 execp->a_text = GET_WORD (abfd, bytes->e_text); 44 execp->a_data = GET_WORD (abfd, bytes->e_data); 45 execp->a_bss = GET_WORD (abfd, bytes->e_bss); 46 execp->a_syms = GET_WORD (abfd, bytes->e_syms); 47 execp->a_entry = GET_WORD (abfd, bytes->e_entry); 48 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize); 49 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize); 50} 51 52/* Swaps the information in an internal exec header structure into the 53 supplied buffer ready for writing to disk. */ 54 55static void 56aout_adobe_swap_exec_header_out (bfd *abfd, 57 struct internal_exec *execp, 58 struct external_exec *bytes) 59{ 60 /* Now fill in fields in the raw data, from the fields in the exec 61 struct. */ 62 H_PUT_32 (abfd, execp->a_info , bytes->e_info); 63 PUT_WORD (abfd, execp->a_text , bytes->e_text); 64 PUT_WORD (abfd, execp->a_data , bytes->e_data); 65 PUT_WORD (abfd, execp->a_bss , bytes->e_bss); 66 PUT_WORD (abfd, execp->a_syms , bytes->e_syms); 67 PUT_WORD (abfd, execp->a_entry , bytes->e_entry); 68 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize); 69 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize); 70} 71 72/* Finish up the opening of a b.out file for reading. Fill in all the 73 fields that are not handled by common code. */ 74 75static const bfd_target * 76aout_adobe_callback (bfd *abfd) 77{ 78 struct internal_exec *execp = exec_hdr (abfd); 79 asection *sect; 80 struct external_segdesc ext[1]; 81 char *section_name; 82 char try_again[30]; /* Name and number. */ 83 char *newname; 84 int trynum; 85 flagword flags; 86 87 /* Architecture and machine type -- unknown in this format. */ 88 bfd_set_arch_mach (abfd, bfd_arch_unknown, 0L); 89 90 /* The positions of the string table and symbol table. */ 91 obj_str_filepos (abfd) = N_STROFF (*execp); 92 obj_sym_filepos (abfd) = N_SYMOFF (*execp); 93 94 /* Suck up the section information from the file, one section at a time. */ 95 for (;;) 96 { 97 bfd_size_type amt = sizeof (*ext); 98 if (bfd_bread ( ext, amt, abfd) != amt) 99 { 100 if (bfd_get_error () != bfd_error_system_call) 101 bfd_set_error (bfd_error_wrong_format); 102 103 return NULL; 104 } 105 switch (ext->e_type[0]) 106 { 107 case N_TEXT: 108 section_name = ".text"; 109 flags = SEC_CODE | SEC_LOAD | SEC_ALLOC | SEC_HAS_CONTENTS; 110 break; 111 112 case N_DATA: 113 section_name = ".data"; 114 flags = SEC_DATA | SEC_LOAD | SEC_ALLOC | SEC_HAS_CONTENTS; 115 break; 116 117 case N_BSS: 118 section_name = ".bss"; 119 flags = SEC_DATA | SEC_HAS_CONTENTS; 120 break; 121 122 case 0: 123 goto no_more_sections; 124 125 default: 126 (*_bfd_error_handler) 127 (_("%B: Unknown section type in a.out.adobe file: %x\n"), 128 abfd, ext->e_type[0]); 129 goto no_more_sections; 130 } 131 132 /* First one is called ".text" or whatever; subsequent ones are 133 ".text1", ".text2", ... */ 134 bfd_set_error (bfd_error_no_error); 135 sect = bfd_make_section_with_flags (abfd, section_name, flags); 136 trynum = 0; 137 138 while (!sect) 139 { 140 if (bfd_get_error () != bfd_error_no_error) 141 /* Some other error -- slide into the sunset. */ 142 return NULL; 143 sprintf (try_again, "%s%d", section_name, ++trynum); 144 sect = bfd_make_section_with_flags (abfd, try_again, flags); 145 } 146 147 /* Fix the name, if it is a sprintf'd name. */ 148 if (sect->name == try_again) 149 { 150 amt = strlen (sect->name); 151 newname = bfd_zalloc (abfd, amt); 152 if (newname == NULL) 153 return NULL; 154 strcpy (newname, sect->name); 155 sect->name = newname; 156 } 157 158 /* Assumed big-endian. */ 159 sect->size = ((ext->e_size[0] << 8) 160 | ext->e_size[1] << 8 161 | ext->e_size[2]); 162 sect->vma = H_GET_32 (abfd, ext->e_virtbase); 163 sect->filepos = H_GET_32 (abfd, ext->e_filebase); 164 /* FIXME XXX alignment? */ 165 166 /* Set relocation information for first section of each type. */ 167 if (trynum == 0) 168 switch (ext->e_type[0]) 169 { 170 case N_TEXT: 171 sect->rel_filepos = N_TRELOFF (*execp); 172 sect->reloc_count = execp->a_trsize; 173 break; 174 175 case N_DATA: 176 sect->rel_filepos = N_DRELOFF (*execp); 177 sect->reloc_count = execp->a_drsize; 178 break; 179 180 default: 181 break; 182 } 183 } 184 no_more_sections: 185 186 adata (abfd).reloc_entry_size = sizeof (struct reloc_std_external); 187 adata (abfd).symbol_entry_size = sizeof (struct external_nlist); 188 adata (abfd).page_size = 1; /* Not applicable. */ 189 adata (abfd).segment_size = 1; /* Not applicable. */ 190 adata (abfd).exec_bytes_size = EXEC_BYTES_SIZE; 191 192 return abfd->xvec; 193} 194 195static const bfd_target * 196aout_adobe_object_p (bfd *abfd) 197{ 198 struct internal_exec anexec; 199 struct external_exec exec_bytes; 200 char *targ; 201 bfd_size_type amt = EXEC_BYTES_SIZE; 202 203 if (bfd_bread (& exec_bytes, amt, abfd) != amt) 204 { 205 if (bfd_get_error () != bfd_error_system_call) 206 bfd_set_error (bfd_error_wrong_format); 207 return NULL; 208 } 209 210 anexec.a_info = H_GET_32 (abfd, exec_bytes.e_info); 211 212 /* Normally we just compare for the magic number. 213 However, a bunch of Adobe tools aren't fixed up yet; they generate 214 files using ZMAGIC(!). 215 If the environment variable GNUTARGET is set to "a.out.adobe", we will 216 take just about any a.out file as an Adobe a.out file. FIXME! */ 217 218 if (N_BADMAG (anexec)) 219 { 220 targ = getenv ("GNUTARGET"); 221 if (targ && !strcmp (targ, a_out_adobe_vec.name)) 222 /* Just continue anyway, if specifically set to this format. */ 223 ; 224 else 225 { 226 bfd_set_error (bfd_error_wrong_format); 227 return NULL; 228 } 229 } 230 231 aout_adobe_swap_exec_header_in (abfd, &exec_bytes, &anexec); 232 return aout_32_some_aout_object_p (abfd, &anexec, aout_adobe_callback); 233} 234 235struct bout_data_struct 236{ 237 struct aoutdata a; 238 struct internal_exec e; 239}; 240 241static bfd_boolean 242aout_adobe_mkobject (bfd *abfd) 243{ 244 struct bout_data_struct *rawptr; 245 bfd_size_type amt = sizeof (struct bout_data_struct); 246 247 rawptr = bfd_zalloc (abfd, amt); 248 if (rawptr == NULL) 249 return FALSE; 250 251 abfd->tdata.bout_data = rawptr; 252 exec_hdr (abfd) = &rawptr->e; 253 254 adata (abfd).reloc_entry_size = sizeof (struct reloc_std_external); 255 adata (abfd).symbol_entry_size = sizeof (struct external_nlist); 256 adata (abfd).page_size = 1; /* Not applicable. */ 257 adata (abfd).segment_size = 1; /* Not applicable. */ 258 adata (abfd).exec_bytes_size = EXEC_BYTES_SIZE; 259 260 return TRUE; 261} 262 263static void 264aout_adobe_write_section (bfd *abfd ATTRIBUTE_UNUSED, 265 sec_ptr sect ATTRIBUTE_UNUSED) 266{ 267 /* FIXME XXX. */ 268} 269 270static bfd_boolean 271aout_adobe_write_object_contents (bfd *abfd) 272{ 273 struct external_exec swapped_hdr; 274 static struct external_segdesc sentinel[1]; /* Initialized to zero. */ 275 asection *sect; 276 bfd_size_type amt; 277 278 exec_hdr (abfd)->a_info = ZMAGIC; 279 280 /* Calculate text size as total of text sections, etc. */ 281 exec_hdr (abfd)->a_text = 0; 282 exec_hdr (abfd)->a_data = 0; 283 exec_hdr (abfd)->a_bss = 0; 284 exec_hdr (abfd)->a_trsize = 0; 285 exec_hdr (abfd)->a_drsize = 0; 286 287 for (sect = abfd->sections; sect; sect = sect->next) 288 { 289 if (sect->flags & SEC_CODE) 290 { 291 exec_hdr (abfd)->a_text += sect->size; 292 exec_hdr (abfd)->a_trsize += sect->reloc_count * 293 sizeof (struct reloc_std_external); 294 } 295 else if (sect->flags & SEC_DATA) 296 { 297 exec_hdr (abfd)->a_data += sect->size; 298 exec_hdr (abfd)->a_drsize += sect->reloc_count * 299 sizeof (struct reloc_std_external); 300 } 301 else if (sect->flags & SEC_ALLOC && !(sect->flags & SEC_LOAD)) 302 exec_hdr (abfd)->a_bss += sect->size; 303 } 304 305 exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) 306 * sizeof (struct external_nlist); 307 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 308 309 aout_adobe_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr); 310 311 amt = EXEC_BYTES_SIZE; 312 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 313 || bfd_bwrite (& swapped_hdr, amt, abfd) != amt) 314 return FALSE; 315 316 /* Now write out the section information. Text first, data next, rest 317 afterward. */ 318 for (sect = abfd->sections; sect; sect = sect->next) 319 if (sect->flags & SEC_CODE) 320 aout_adobe_write_section (abfd, sect); 321 322 for (sect = abfd->sections; sect; sect = sect->next) 323 if (sect->flags & SEC_DATA) 324 aout_adobe_write_section (abfd, sect); 325 326 for (sect = abfd->sections; sect; sect = sect->next) 327 if (!(sect->flags & (SEC_CODE | SEC_DATA))) 328 aout_adobe_write_section (abfd, sect); 329 330 /* Write final `sentinel` section header (with type of 0). */ 331 amt = sizeof (*sentinel); 332 if (bfd_bwrite (sentinel, amt, abfd) != amt) 333 return FALSE; 334 335 /* Now write out reloc info, followed by syms and strings. */ 336 if (bfd_get_symcount (abfd) != 0) 337 { 338 if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (*exec_hdr (abfd))), SEEK_SET) 339 != 0) 340 return FALSE; 341 342 if (! aout_32_write_syms (abfd)) 343 return FALSE; 344 345 if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (*exec_hdr (abfd))), SEEK_SET) 346 != 0) 347 return FALSE; 348 349 for (sect = abfd->sections; sect; sect = sect->next) 350 if (sect->flags & SEC_CODE) 351 if (!aout_32_squirt_out_relocs (abfd, sect)) 352 return FALSE; 353 354 if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (*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_DATA) 360 if (!aout_32_squirt_out_relocs (abfd, sect)) 361 return FALSE; 362 } 363 364 return TRUE; 365} 366 367static bfd_boolean 368aout_adobe_set_section_contents (bfd *abfd, 369 asection *section, 370 const void * location, 371 file_ptr offset, 372 bfd_size_type count) 373{ 374 file_ptr section_start; 375 sec_ptr sect; 376 377 /* Set by bfd.c handler. */ 378 if (! abfd->output_has_begun) 379 { 380 /* Assign file offsets to sections. Text sections are first, and 381 are contiguous. Then data sections. Everything else at the end. */ 382 section_start = N_TXTOFF (ignore<-->me); 383 384 for (sect = abfd->sections; sect; sect = sect->next) 385 { 386 if (sect->flags & SEC_CODE) 387 { 388 sect->filepos = section_start; 389 /* FIXME: Round to alignment. */ 390 section_start += sect->size; 391 } 392 } 393 394 for (sect = abfd->sections; sect; sect = sect->next) 395 { 396 if (sect->flags & SEC_DATA) 397 { 398 sect->filepos = section_start; 399 /* FIXME: Round to alignment. */ 400 section_start += sect->size; 401 } 402 } 403 404 for (sect = abfd->sections; sect; sect = sect->next) 405 { 406 if (sect->flags & SEC_HAS_CONTENTS && 407 !(sect->flags & (SEC_CODE | SEC_DATA))) 408 { 409 sect->filepos = section_start; 410 /* FIXME: Round to alignment. */ 411 section_start += sect->size; 412 } 413 } 414 } 415 416 /* Regardless, once we know what we're doing, we might as well get 417 going. */ 418 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0) 419 return FALSE; 420 421 if (count == 0) 422 return TRUE; 423 424 return bfd_bwrite (location, count, abfd) == count; 425} 426 427static bfd_boolean 428aout_adobe_set_arch_mach (bfd *abfd, 429 enum bfd_architecture arch, 430 unsigned long machine) 431{ 432 if (! bfd_default_set_arch_mach (abfd, arch, machine)) 433 return FALSE; 434 435 if (arch == bfd_arch_unknown 436 || arch == bfd_arch_m68k) 437 return TRUE; 438 439 return FALSE; 440} 441 442static int 443aout_adobe_sizeof_headers (bfd *ignore_abfd ATTRIBUTE_UNUSED, 444 struct bfd_link_info *info ATTRIBUTE_UNUSED) 445{ 446 return sizeof (struct internal_exec); 447} 448 449/* Build the transfer vector for Adobe A.Out files. */ 450 451#define aout_32_bfd_make_debug_symbol ((asymbol *(*) (bfd *, void *, unsigned long)) bfd_nullvoidptr) 452#define aout_32_bfd_reloc_type_lookup ((reloc_howto_type *(*) (bfd *, bfd_reloc_code_real_type)) bfd_nullvoidptr) 453#define aout_32_bfd_reloc_name_lookup ((reloc_howto_type *(*) (bfd *, const char *)) bfd_nullvoidptr) 454#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info 455#define aout_32_set_arch_mach aout_adobe_set_arch_mach 456#define aout_32_set_section_contents aout_adobe_set_section_contents 457#define aout_32_sizeof_headers aout_adobe_sizeof_headers 458#define aout_32_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents 459#define aout_32_get_section_contents_in_window _bfd_generic_get_section_contents_in_window 460#define aout_32_bfd_relax_section bfd_generic_relax_section 461#define aout_32_bfd_gc_sections bfd_generic_gc_sections 462#define aout_32_bfd_merge_sections bfd_generic_merge_sections 463#define aout_32_bfd_is_group_section bfd_generic_is_group_section 464#define aout_32_bfd_discard_group bfd_generic_discard_group 465#define aout_32_section_already_linked _bfd_generic_section_already_linked 466#define aout_32_bfd_define_common_symbol bfd_generic_define_common_symbol 467#define aout_32_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 468#define aout_32_bfd_link_hash_table_free _bfd_generic_link_hash_table_free 469#define aout_32_bfd_link_add_symbols _bfd_generic_link_add_symbols 470#define aout_32_bfd_link_just_syms _bfd_generic_link_just_syms 471#define aout_32_bfd_copy_link_hash_symbol_type \ 472 _bfd_generic_copy_link_hash_symbol_type 473#define aout_32_bfd_final_link _bfd_generic_final_link 474#define aout_32_bfd_link_split_section _bfd_generic_link_split_section 475 476const bfd_target a_out_adobe_vec = 477{ 478 "a.out.adobe", /* Name. */ 479 bfd_target_aout_flavour, 480 BFD_ENDIAN_BIG, /* Data byte order is unknown (big assumed). */ 481 BFD_ENDIAN_BIG, /* Header byte order is big. */ 482 (HAS_RELOC | EXEC_P | /* Object flags. */ 483 HAS_LINENO | HAS_DEBUG | 484 HAS_SYMS | HAS_LOCALS | WP_TEXT ), 485 /* section flags */ 486 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_DATA | SEC_RELOC), 487 '_', /* Symbol leading char. */ 488 ' ', /* AR_pad_char. */ 489 16, /* AR_max_namelen. */ 490 491 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 492 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 493 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* Data. */ 494 bfd_getb64, bfd_getb_signed_64, bfd_putb64, 495 bfd_getb32, bfd_getb_signed_32, bfd_putb32, 496 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* Headers. */ 497 498 {_bfd_dummy_target, aout_adobe_object_p, /* bfd_check_format. */ 499 bfd_generic_archive_p, _bfd_dummy_target}, 500 {bfd_false, aout_adobe_mkobject, /* bfd_set_format. */ 501 _bfd_generic_mkarchive, bfd_false}, 502 {bfd_false, aout_adobe_write_object_contents,/* bfd_write_contents. */ 503 _bfd_write_archive_contents, bfd_false}, 504 505 BFD_JUMP_TABLE_GENERIC (aout_32), 506 BFD_JUMP_TABLE_COPY (_bfd_generic), 507 BFD_JUMP_TABLE_CORE (_bfd_nocore), 508 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), 509 BFD_JUMP_TABLE_SYMBOLS (aout_32), 510 BFD_JUMP_TABLE_RELOCS (aout_32), 511 BFD_JUMP_TABLE_WRITE (aout_32), 512 BFD_JUMP_TABLE_LINK (aout_32), 513 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 514 515 NULL, 516 517 NULL 518}; 519