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1 /* Define a target vector and some small routines for a variant of a.out.
2 Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20 #include "aout/aout64.h"
21 #include "aout/stab_gnu.h"
22 #include "aout/ar.h"
23 /*#include "libaout.h"*/
24
25 extern reloc_howto_type * NAME(aout,reloc_type_lookup) ();
26
27 /* Set parameters about this a.out file that are machine-dependent.
28 This routine is called from some_aout_object_p just before it returns. */
29 #ifndef MY_callback
30 static const bfd_target *
31 MY(callback) (abfd)
32 bfd *abfd;
33 {
34 struct internal_exec *execp = exec_hdr (abfd);
35 unsigned int arch_align_power;
36 unsigned long arch_align;
37
38 /* Calculate the file positions of the parts of a newly read aout header */
39 obj_textsec (abfd)->_raw_size = N_TXTSIZE(*execp);
40
41 /* The virtual memory addresses of the sections */
42 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
43 obj_datasec (abfd)->vma = N_DATADDR(*execp);
44 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
45
46 /* The file offsets of the sections */
47 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
48 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
49
50 /* The file offsets of the relocation info */
51 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
52 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
53
54 /* The file offsets of the string table and symbol table. */
55 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
56 obj_str_filepos (abfd) = N_STROFF (*execp);
57
58 /* Determine the architecture and machine type of the object file. */
59 #ifdef SET_ARCH_MACH
60 SET_ARCH_MACH(abfd, *execp);
61 #else
62 bfd_default_set_arch_mach(abfd, DEFAULT_ARCH, 0);
63 #endif
64
65 /* Now that we know the architecture, set the alignments of the
66 sections. This is normally done by NAME(aout,new_section_hook),
67 but when the initial sections were created the architecture had
68 not yet been set. However, for backward compatibility, we don't
69 set the alignment power any higher than as required by the size
70 of the section. */
71 arch_align_power = bfd_get_arch_info (abfd)->section_align_power;
72 arch_align = 1 << arch_align_power;
73 if ((BFD_ALIGN (obj_textsec (abfd)->_raw_size, arch_align)
74 == obj_textsec (abfd)->_raw_size)
75 && (BFD_ALIGN (obj_datasec (abfd)->_raw_size, arch_align)
76 == obj_datasec (abfd)->_raw_size)
77 && (BFD_ALIGN (obj_bsssec (abfd)->_raw_size, arch_align)
78 == obj_bsssec (abfd)->_raw_size))
79 {
80 obj_textsec (abfd)->alignment_power = arch_align_power;
81 obj_datasec (abfd)->alignment_power = arch_align_power;
82 obj_bsssec (abfd)->alignment_power = arch_align_power;
83 }
84
85 /* Don't set sizes now -- can't be sure until we know arch & mach.
86 Sizes get set in set_sizes callback, later. */
87 #if 0
88 adata(abfd).page_size = TARGET_PAGE_SIZE;
89 #ifdef SEGMENT_SIZE
90 adata(abfd).segment_size = SEGMENT_SIZE;
91 #else
92 adata(abfd).segment_size = TARGET_PAGE_SIZE;
93 #endif
94 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
95 #endif
96
97 return abfd->xvec;
98 }
99 #endif
100
101 #ifndef MY_object_p
102 /* Finish up the reading of an a.out file header */
103
104 static const bfd_target *
105 MY(object_p) (abfd)
106 bfd *abfd;
107 {
108 struct external_exec exec_bytes; /* Raw exec header from file */
109 struct internal_exec exec; /* Cleaned-up exec header */
110 const bfd_target *target;
111
112 if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
113 != EXEC_BYTES_SIZE) {
114 if (bfd_get_error () != bfd_error_system_call)
115 bfd_set_error (bfd_error_wrong_format);
116 return 0;
117 }
118
119 #ifdef SWAP_MAGIC
120 exec.a_info = SWAP_MAGIC (exec_bytes.e_info);
121 #else
122 exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
123 #endif /* SWAP_MAGIC */
124
125 if (N_BADMAG (exec)) return 0;
126 #ifdef MACHTYPE_OK
127 if (!(MACHTYPE_OK (N_MACHTYPE (exec)))) return 0;
128 #endif
129
130 NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
131
132 #ifdef SWAP_MAGIC
133 /* swap_exec_header_in read in a_info with the wrong byte order */
134 exec.a_info = SWAP_MAGIC (exec_bytes.e_info);
135 #endif /* SWAP_MAGIC */
136
137 target = NAME(aout,some_aout_object_p) (abfd, &exec, MY(callback));
138
139 #ifdef ENTRY_CAN_BE_ZERO
140 /* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
141 * means that it isn't obvious if EXEC_P should be set.
142 * All of the following must be true for an executable:
143 * There must be no relocations, the bfd can be neither an
144 * archive nor an archive element, and the file must be executable. */
145
146 if (exec.a_trsize + exec.a_drsize == 0
147 && bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
148 {
149 struct stat buf;
150 #ifndef S_IXUSR
151 #define S_IXUSR 0100 /* Execute by owner. */
152 #endif
153 if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
154 abfd->flags |= EXEC_P;
155 }
156 #endif /* ENTRY_CAN_BE_ZERO */
157
158 return target;
159 }
160 #define MY_object_p MY(object_p)
161 #endif
162
163
164 #ifndef MY_mkobject
165 static boolean
166 MY(mkobject) (abfd)
167 bfd *abfd;
168 {
169 if (NAME(aout,mkobject)(abfd) == false)
170 return false;
171 #if 0 /* Sizes get set in set_sizes callback, later, after we know
172 the architecture and machine. */
173 adata(abfd).page_size = TARGET_PAGE_SIZE;
174 #ifdef SEGMENT_SIZE
175 adata(abfd).segment_size = SEGMENT_SIZE;
176 #else
177 adata(abfd).segment_size = TARGET_PAGE_SIZE;
178 #endif
179 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
180 #endif
181 return true;
182 }
183 #define MY_mkobject MY(mkobject)
184 #endif
185
186 #ifndef MY_bfd_copy_private_section_data
187
188 /* Copy private section data. This actually does nothing with the
189 sections. It copies the subformat field. We copy it here, because
190 we need to know whether this is a QMAGIC file before we set the
191 section contents, and copy_private_bfd_data is not called until
192 after the section contents have been set. */
193
194 /*ARGSUSED*/
195 static boolean
196 MY_bfd_copy_private_section_data (ibfd, isec, obfd, osec)
197 bfd *ibfd;
198 asection *isec;
199 bfd *obfd;
200 asection *osec;
201 {
202 if (bfd_get_flavour (obfd) == bfd_target_aout_flavour)
203 obj_aout_subformat (obfd) = obj_aout_subformat (ibfd);
204 return true;
205 }
206
207 #endif
208
209 /* Write an object file.
210 Section contents have already been written. We write the
211 file header, symbols, and relocation. */
212
213 #ifndef MY_write_object_contents
214 static boolean
215 MY(write_object_contents) (abfd)
216 bfd *abfd;
217 {
218 struct external_exec exec_bytes;
219 struct internal_exec *execp = exec_hdr (abfd);
220
221 #if CHOOSE_RELOC_SIZE
222 CHOOSE_RELOC_SIZE(abfd);
223 #else
224 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
225 #endif
226
227 WRITE_HEADERS(abfd, execp);
228
229 return true;
230 }
231 #define MY_write_object_contents MY(write_object_contents)
232 #endif
233
234 #ifndef MY_set_sizes
235 static boolean
236 MY(set_sizes) (abfd)
237 bfd *abfd;
238 {
239 adata(abfd).page_size = TARGET_PAGE_SIZE;
240
241 #ifdef SEGMENT_SIZE
242 adata(abfd).segment_size = SEGMENT_SIZE;
243 #else
244 adata(abfd).segment_size = TARGET_PAGE_SIZE;
245 #endif
246
247 #ifdef ZMAGIC_DISK_BLOCK_SIZE
248 adata(abfd).zmagic_disk_block_size = ZMAGIC_DISK_BLOCK_SIZE;
249 #else
250 adata(abfd).zmagic_disk_block_size = TARGET_PAGE_SIZE;
251 #endif
252
253 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
254 return true;
255 }
256 #define MY_set_sizes MY(set_sizes)
257 #endif
258
259 #ifndef MY_exec_hdr_flags
260 #define MY_exec_hdr_flags 0
261 #endif
262
263 #ifndef MY_backend_data
264
265 #ifndef MY_zmagic_contiguous
266 #define MY_zmagic_contiguous 0
267 #endif
268 #ifndef MY_text_includes_header
269 #define MY_text_includes_header 0
270 #endif
271 #ifndef MY_exec_header_not_counted
272 #define MY_exec_header_not_counted 0
273 #endif
274 #ifndef MY_add_dynamic_symbols
275 #define MY_add_dynamic_symbols 0
276 #endif
277 #ifndef MY_add_one_symbol
278 #define MY_add_one_symbol 0
279 #endif
280 #ifndef MY_link_dynamic_object
281 #define MY_link_dynamic_object 0
282 #endif
283 #ifndef MY_write_dynamic_symbol
284 #define MY_write_dynamic_symbol 0
285 #endif
286 #ifndef MY_check_dynamic_reloc
287 #define MY_check_dynamic_reloc 0
288 #endif
289 #ifndef MY_finish_dynamic_link
290 #define MY_finish_dynamic_link 0
291 #endif
292
293 static CONST struct aout_backend_data MY(backend_data) = {
294 MY_zmagic_contiguous,
295 MY_text_includes_header,
296 MY_exec_hdr_flags,
297 0, /* text vma? */
298 MY_set_sizes,
299 MY_exec_header_not_counted,
300 MY_add_dynamic_symbols,
301 MY_add_one_symbol,
302 MY_link_dynamic_object,
303 MY_write_dynamic_symbol,
304 MY_check_dynamic_reloc,
305 MY_finish_dynamic_link
306 };
307 #define MY_backend_data &MY(backend_data)
308 #endif
309
310 #ifndef MY_final_link_callback
311
312 /* Callback for the final_link routine to set the section offsets. */
313
314 static void MY_final_link_callback
315 PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
316
317 static void
318 MY_final_link_callback (abfd, ptreloff, pdreloff, psymoff)
319 bfd *abfd;
320 file_ptr *ptreloff;
321 file_ptr *pdreloff;
322 file_ptr *psymoff;
323 {
324 struct internal_exec *execp = exec_hdr (abfd);
325
326 *ptreloff = N_TRELOFF (*execp);
327 *pdreloff = N_DRELOFF (*execp);
328 *psymoff = N_SYMOFF (*execp);
329 }
330
331 #endif
332
333 #ifndef MY_bfd_final_link
334
335 /* Final link routine. We need to use a call back to get the correct
336 offsets in the output file. */
337
338 static boolean
339 MY_bfd_final_link (abfd, info)
340 bfd *abfd;
341 struct bfd_link_info *info;
342 {
343 return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
344 }
345
346 #endif
347
348 /* We assume BFD generic archive files. */
349 #ifndef MY_openr_next_archived_file
350 #define MY_openr_next_archived_file bfd_generic_openr_next_archived_file
351 #endif
352 #ifndef MY_generic_stat_arch_elt
353 #define MY_generic_stat_arch_elt bfd_generic_stat_arch_elt
354 #endif
355 #ifndef MY_slurp_armap
356 #define MY_slurp_armap bfd_slurp_bsd_armap
357 #endif
358 #ifndef MY_slurp_extended_name_table
359 #define MY_slurp_extended_name_table _bfd_slurp_extended_name_table
360 #endif
361 #ifndef MY_construct_extended_name_table
362 #define MY_construct_extended_name_table \
363 _bfd_archive_bsd_construct_extended_name_table
364 #endif
365 #ifndef MY_write_armap
366 #define MY_write_armap bsd_write_armap
367 #endif
368 #ifndef MY_read_ar_hdr
369 #define MY_read_ar_hdr _bfd_generic_read_ar_hdr
370 #endif
371 #ifndef MY_truncate_arname
372 #define MY_truncate_arname bfd_bsd_truncate_arname
373 #endif
374 #ifndef MY_update_armap_timestamp
375 #define MY_update_armap_timestamp _bfd_archive_bsd_update_armap_timestamp
376 #endif
377
378 /* No core file defined here -- configure in trad-core.c separately. */
379 #ifndef MY_core_file_failing_command
380 #define MY_core_file_failing_command _bfd_nocore_core_file_failing_command
381 #endif
382 #ifndef MY_core_file_failing_signal
383 #define MY_core_file_failing_signal _bfd_nocore_core_file_failing_signal
384 #endif
385 #ifndef MY_core_file_matches_executable_p
386 #define MY_core_file_matches_executable_p \
387 _bfd_nocore_core_file_matches_executable_p
388 #endif
389 #ifndef MY_core_file_p
390 #define MY_core_file_p _bfd_dummy_target
391 #endif
392
393 #ifndef MY_bfd_debug_info_start
394 #define MY_bfd_debug_info_start bfd_void
395 #endif
396 #ifndef MY_bfd_debug_info_end
397 #define MY_bfd_debug_info_end bfd_void
398 #endif
399 #ifndef MY_bfd_debug_info_accumulate
400 #define MY_bfd_debug_info_accumulate \
401 (void (*) PARAMS ((bfd*, struct sec *))) bfd_void
402 #endif
403
404 #ifndef MY_core_file_failing_command
405 #define MY_core_file_failing_command NAME(aout,core_file_failing_command)
406 #endif
407 #ifndef MY_core_file_failing_signal
408 #define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
409 #endif
410 #ifndef MY_core_file_matches_executable_p
411 #define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
412 #endif
413 #ifndef MY_set_section_contents
414 #define MY_set_section_contents NAME(aout,set_section_contents)
415 #endif
416 #ifndef MY_get_section_contents
417 #define MY_get_section_contents NAME(aout,get_section_contents)
418 #endif
419 #ifndef MY_new_section_hook
420 #define MY_new_section_hook NAME(aout,new_section_hook)
421 #endif
422 #ifndef MY_get_symtab_upper_bound
423 #define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
424 #endif
425 #ifndef MY_get_symtab
426 #define MY_get_symtab NAME(aout,get_symtab)
427 #endif
428 #ifndef MY_get_reloc_upper_bound
429 #define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
430 #endif
431 #ifndef MY_canonicalize_reloc
432 #define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
433 #endif
434 #ifndef MY_make_empty_symbol
435 #define MY_make_empty_symbol NAME(aout,make_empty_symbol)
436 #endif
437 #ifndef MY_print_symbol
438 #define MY_print_symbol NAME(aout,print_symbol)
439 #endif
440 #ifndef MY_get_symbol_info
441 #define MY_get_symbol_info NAME(aout,get_symbol_info)
442 #endif
443 #ifndef MY_get_lineno
444 #define MY_get_lineno NAME(aout,get_lineno)
445 #endif
446 #ifndef MY_set_arch_mach
447 #define MY_set_arch_mach NAME(aout,set_arch_mach)
448 #endif
449 #ifndef MY_find_nearest_line
450 #define MY_find_nearest_line NAME(aout,find_nearest_line)
451 #endif
452 #ifndef MY_sizeof_headers
453 #define MY_sizeof_headers NAME(aout,sizeof_headers)
454 #endif
455 #ifndef MY_bfd_get_relocated_section_contents
456 #define MY_bfd_get_relocated_section_contents \
457 bfd_generic_get_relocated_section_contents
458 #endif
459 #ifndef MY_bfd_relax_section
460 #define MY_bfd_relax_section bfd_generic_relax_section
461 #endif
462 #ifndef MY_bfd_reloc_type_lookup
463 #define MY_bfd_reloc_type_lookup NAME(aout,reloc_type_lookup)
464 #endif
465 #ifndef MY_bfd_make_debug_symbol
466 #define MY_bfd_make_debug_symbol 0
467 #endif
468 #ifndef MY_read_minisymbols
469 #define MY_read_minisymbols NAME(aout,read_minisymbols)
470 #endif
471 #ifndef MY_minisymbol_to_symbol
472 #define MY_minisymbol_to_symbol NAME(aout,minisymbol_to_symbol)
473 #endif
474 #ifndef MY_bfd_link_hash_table_create
475 #define MY_bfd_link_hash_table_create NAME(aout,link_hash_table_create)
476 #endif
477 #ifndef MY_bfd_link_add_symbols
478 #define MY_bfd_link_add_symbols NAME(aout,link_add_symbols)
479 #endif
480 #ifndef MY_bfd_link_split_section
481 #define MY_bfd_link_split_section _bfd_generic_link_split_section
482 #endif
483
484
485 #ifndef MY_bfd_copy_private_bfd_data
486 #define MY_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
487 #endif
488
489 #ifndef MY_bfd_merge_private_bfd_data
490 #define MY_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
491 #endif
492
493 #ifndef MY_bfd_copy_private_symbol_data
494 #define MY_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
495 #endif
496
497 #ifndef MY_bfd_print_private_bfd_data
498 #define MY_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
499 #endif
500
501 #ifndef MY_bfd_set_private_flags
502 #define MY_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
503 #endif
504
505 #ifndef MY_bfd_is_local_label
506 #define MY_bfd_is_local_label bfd_generic_is_local_label
507 #endif
508
509 #ifndef MY_bfd_free_cached_info
510 #define MY_bfd_free_cached_info NAME(aout,bfd_free_cached_info)
511 #endif
512
513 #ifndef MY_close_and_cleanup
514 #define MY_close_and_cleanup MY_bfd_free_cached_info
515 #endif
516
517 #ifndef MY_get_dynamic_symtab_upper_bound
518 #define MY_get_dynamic_symtab_upper_bound \
519 _bfd_nodynamic_get_dynamic_symtab_upper_bound
520 #endif
521 #ifndef MY_canonicalize_dynamic_symtab
522 #define MY_canonicalize_dynamic_symtab \
523 _bfd_nodynamic_canonicalize_dynamic_symtab
524 #endif
525 #ifndef MY_get_dynamic_reloc_upper_bound
526 #define MY_get_dynamic_reloc_upper_bound \
527 _bfd_nodynamic_get_dynamic_reloc_upper_bound
528 #endif
529 #ifndef MY_canonicalize_dynamic_reloc
530 #define MY_canonicalize_dynamic_reloc \
531 _bfd_nodynamic_canonicalize_dynamic_reloc
532 #endif
533
534 /* Aout symbols normally have leading underscores */
535 #ifndef MY_symbol_leading_char
536 #define MY_symbol_leading_char '_'
537 #endif
538
539 /* Aout archives normally use spaces for padding */
540 #ifndef AR_PAD_CHAR
541 #define AR_PAD_CHAR ' '
542 #endif
543
544 #ifndef MY_BFD_TARGET
545 const bfd_target MY(vec) =
546 {
547 TARGETNAME, /* name */
548 bfd_target_aout_flavour,
549 #ifdef TARGET_IS_BIG_ENDIAN_P
550 true, /* target byte order (big) */
551 true, /* target headers byte order (big) */
552 #else
553 false, /* target byte order (little) */
554 false, /* target headers byte order (little) */
555 #endif
556 (HAS_RELOC | EXEC_P | /* object flags */
557 HAS_LINENO | HAS_DEBUG |
558 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
559 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
560 MY_symbol_leading_char,
561 AR_PAD_CHAR, /* ar_pad_char */
562 15, /* ar_max_namelen */
563 #ifdef TARGET_IS_BIG_ENDIAN_P
564 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
565 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
566 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
567 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
568 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
569 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
570 #else
571 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
572 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
573 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
574 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
575 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
576 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
577 #endif
578 {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
579 bfd_generic_archive_p, MY_core_file_p},
580 {bfd_false, MY_mkobject, /* bfd_set_format */
581 _bfd_generic_mkarchive, bfd_false},
582 {bfd_false, MY_write_object_contents, /* bfd_write_contents */
583 _bfd_write_archive_contents, bfd_false},
584
585 BFD_JUMP_TABLE_GENERIC (MY),
586 BFD_JUMP_TABLE_COPY (MY),
587 BFD_JUMP_TABLE_CORE (MY),
588 BFD_JUMP_TABLE_ARCHIVE (MY),
589 BFD_JUMP_TABLE_SYMBOLS (MY),
590 BFD_JUMP_TABLE_RELOCS (MY),
591 BFD_JUMP_TABLE_WRITE (MY),
592 BFD_JUMP_TABLE_LINK (MY),
593 BFD_JUMP_TABLE_DYNAMIC (MY),
594
595 (PTR) MY_backend_data,
596 };
597 #endif /* MY_BFD_TARGET */