1 /* Define a target vector and some small routines for a variant of a.out.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
23 #include "aout/aout64.h"
24 #include "aout/stab_gnu.h"
26 /*#include "libaout.h"*/
29 #define SEGMENT_SIZE TARGET_PAGE_SIZE
32 extern reloc_howto_type * NAME (aout, reloc_type_lookup) (bfd *, bfd_reloc_code_real_type);
33 extern reloc_howto_type * NAME (aout, reloc_name_lookup) (bfd *, const char *);
35 /* Set parameters about this a.out file that are machine-dependent.
36 This routine is called from some_aout_object_p just before it returns. */
39 static const bfd_target *
40 MY (callback) (bfd *abfd)
42 struct internal_exec *execp = exec_hdr (abfd);
43 unsigned int arch_align_power;
44 unsigned long arch_align;
46 /* Calculate the file positions of the parts of a newly read aout header. */
47 obj_textsec (abfd)->size = N_TXTSIZE (*execp);
49 /* The virtual memory addresses of the sections. */
50 obj_textsec (abfd)->vma = N_TXTADDR (*execp);
51 obj_datasec (abfd)->vma = N_DATADDR (*execp);
52 obj_bsssec (abfd)->vma = N_BSSADDR (*execp);
54 /* For some targets, if the entry point is not in the same page
55 as the start of the text, then adjust the VMA so that it is.
56 FIXME: Do this with a macro like SET_ARCH_MACH instead? */
57 if (aout_backend_info (abfd)->entry_is_text_address
58 && execp->a_entry > obj_textsec (abfd)->vma)
62 adjust = execp->a_entry - obj_textsec (abfd)->vma;
63 /* Adjust only by whole pages. */
64 adjust &= ~(TARGET_PAGE_SIZE - 1);
65 obj_textsec (abfd)->vma += adjust;
66 obj_datasec (abfd)->vma += adjust;
67 obj_bsssec (abfd)->vma += adjust;
70 /* Set the load addresses to be the same as the virtual addresses. */
71 obj_textsec (abfd)->lma = obj_textsec (abfd)->vma;
72 obj_datasec (abfd)->lma = obj_datasec (abfd)->vma;
73 obj_bsssec (abfd)->lma = obj_bsssec (abfd)->vma;
75 /* The file offsets of the sections. */
76 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
77 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
79 /* The file offsets of the relocation info. */
80 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp);
81 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp);
83 /* The file offsets of the string table and symbol table. */
84 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
85 obj_str_filepos (abfd) = N_STROFF (*execp);
87 /* Determine the architecture and machine type of the object file. */
89 SET_ARCH_MACH (abfd, *execp);
91 bfd_default_set_arch_mach (abfd, DEFAULT_ARCH, 0);
94 /* The number of relocation records. This must be called after
95 SET_ARCH_MACH. It assumes that SET_ARCH_MACH will set
96 obj_reloc_entry_size correctly, if the reloc size is not
98 obj_textsec (abfd)->reloc_count =
99 execp->a_trsize / obj_reloc_entry_size (abfd);
100 obj_datasec (abfd)->reloc_count =
101 execp->a_drsize / obj_reloc_entry_size (abfd);
103 /* Now that we know the architecture, set the alignments of the
104 sections. This is normally done by NAME (aout,new_section_hook),
105 but when the initial sections were created the architecture had
106 not yet been set. However, for backward compatibility, we don't
107 set the alignment power any higher than as required by the size
109 arch_align_power = bfd_get_arch_info (abfd)->section_align_power;
110 arch_align = 1 << arch_align_power;
111 if ((BFD_ALIGN (obj_textsec (abfd)->size, arch_align)
112 == obj_textsec (abfd)->size)
113 && (BFD_ALIGN (obj_datasec (abfd)->size, arch_align)
114 == obj_datasec (abfd)->size)
115 && (BFD_ALIGN (obj_bsssec (abfd)->size, arch_align)
116 == obj_bsssec (abfd)->size))
118 obj_textsec (abfd)->alignment_power = arch_align_power;
119 obj_datasec (abfd)->alignment_power = arch_align_power;
120 obj_bsssec (abfd)->alignment_power = arch_align_power;
123 /* Don't set sizes now -- can't be sure until we know arch & mach.
124 Sizes get set in set_sizes callback, later. */
131 /* Finish up the reading of an a.out file header. */
133 static const bfd_target *
134 MY (object_p) (bfd *abfd)
136 struct external_exec exec_bytes; /* Raw exec header from file. */
137 struct internal_exec exec; /* Cleaned-up exec header. */
138 const bfd_target *target;
139 bfd_size_type amt = EXEC_BYTES_SIZE;
141 if (bfd_bread ((void *) &exec_bytes, amt, abfd) != amt)
143 if (bfd_get_error () != bfd_error_system_call)
144 bfd_set_error (bfd_error_wrong_format);
149 exec.a_info = SWAP_MAGIC (exec_bytes.e_info);
151 exec.a_info = GET_MAGIC (abfd, exec_bytes.e_info);
158 if (!(MACHTYPE_OK (N_MACHTYPE (exec))))
162 NAME (aout, swap_exec_header_in) (abfd, &exec_bytes, &exec);
165 /* Swap_exec_header_in read in a_info with the wrong byte order. */
166 exec.a_info = SWAP_MAGIC (exec_bytes.e_info);
169 target = NAME (aout, some_aout_object_p) (abfd, &exec, MY (callback));
171 #ifdef ENTRY_CAN_BE_ZERO
172 /* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
173 means that it isn't obvious if EXEC_P should be set.
174 All of the following must be true for an executable:
175 There must be no relocations, the bfd can be neither an
176 archive nor an archive element, and the file must be executable. */
178 if (exec.a_trsize + exec.a_drsize == 0
179 && bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
183 #define S_IXUSR 0100 /* Execute by owner. */
185 if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
186 abfd->flags |= EXEC_P;
188 #endif /* ENTRY_CAN_BE_ZERO */
192 #define MY_object_p MY (object_p)
198 MY (mkobject) (bfd *abfd)
200 return NAME (aout, mkobject (abfd));
203 #define MY_mkobject MY (mkobject)
206 #ifndef MY_bfd_copy_private_section_data
208 /* Copy private section data. This actually does nothing with the
209 sections. It copies the subformat field. We copy it here, because
210 we need to know whether this is a QMAGIC file before we set the
211 section contents, and copy_private_bfd_data is not called until
212 after the section contents have been set. */
215 MY_bfd_copy_private_section_data (bfd *ibfd,
216 asection *isec ATTRIBUTE_UNUSED,
218 asection *osec ATTRIBUTE_UNUSED)
220 if (bfd_get_flavour (ibfd) == bfd_target_aout_flavour
221 && bfd_get_flavour (obfd) == bfd_target_aout_flavour)
222 obj_aout_subformat (obfd) = obj_aout_subformat (ibfd);
228 /* Write an object file.
229 Section contents have already been written. We write the
230 file header, symbols, and relocation. */
232 #ifndef MY_write_object_contents
235 MY (write_object_contents) (bfd *abfd)
237 struct external_exec exec_bytes;
238 struct internal_exec *execp = exec_hdr (abfd);
240 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
242 WRITE_HEADERS (abfd, execp);
246 #define MY_write_object_contents MY (write_object_contents)
252 MY (set_sizes) (bfd *abfd)
254 adata(abfd).page_size = TARGET_PAGE_SIZE;
255 adata(abfd).segment_size = SEGMENT_SIZE;
257 #ifdef ZMAGIC_DISK_BLOCK_SIZE
258 adata(abfd).zmagic_disk_block_size = ZMAGIC_DISK_BLOCK_SIZE;
260 adata(abfd).zmagic_disk_block_size = TARGET_PAGE_SIZE;
263 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
266 #define MY_set_sizes MY (set_sizes)
269 #ifndef MY_exec_hdr_flags
270 #define MY_exec_hdr_flags 0
273 #ifndef MY_backend_data
275 #ifndef MY_zmagic_contiguous
276 #define MY_zmagic_contiguous 0
278 #ifndef MY_text_includes_header
279 #define MY_text_includes_header 0
281 #ifndef MY_entry_is_text_address
282 #define MY_entry_is_text_address 0
284 #ifndef MY_exec_header_not_counted
285 #define MY_exec_header_not_counted 0
287 #ifndef MY_add_dynamic_symbols
288 #define MY_add_dynamic_symbols 0
290 #ifndef MY_add_one_symbol
291 #define MY_add_one_symbol 0
293 #ifndef MY_link_dynamic_object
294 #define MY_link_dynamic_object 0
296 #ifndef MY_write_dynamic_symbol
297 #define MY_write_dynamic_symbol 0
299 #ifndef MY_check_dynamic_reloc
300 #define MY_check_dynamic_reloc 0
302 #ifndef MY_finish_dynamic_link
303 #define MY_finish_dynamic_link 0
306 static const struct aout_backend_data MY (backend_data) =
308 MY_zmagic_contiguous,
309 MY_text_includes_header,
310 MY_entry_is_text_address,
314 MY_exec_header_not_counted,
315 MY_add_dynamic_symbols,
317 MY_link_dynamic_object,
318 MY_write_dynamic_symbol,
319 MY_check_dynamic_reloc,
320 MY_finish_dynamic_link
322 #define MY_backend_data &MY (backend_data)
325 #ifndef MY_final_link_callback
327 /* Callback for the final_link routine to set the section offsets. */
330 MY_final_link_callback (bfd *abfd,
335 struct internal_exec *execp = exec_hdr (abfd);
337 *ptreloff = N_TRELOFF (*execp);
338 *pdreloff = N_DRELOFF (*execp);
339 *psymoff = N_SYMOFF (*execp);
344 #ifndef MY_bfd_final_link
346 /* Final link routine. We need to use a call back to get the correct
347 offsets in the output file. */
350 MY_bfd_final_link (bfd *abfd, struct bfd_link_info *info)
352 return NAME (aout, final_link) (abfd, info, MY_final_link_callback);
357 /* We assume BFD generic archive files. */
358 #ifndef MY_openr_next_archived_file
359 #define MY_openr_next_archived_file bfd_generic_openr_next_archived_file
361 #ifndef MY_get_elt_at_index
362 #define MY_get_elt_at_index _bfd_generic_get_elt_at_index
364 #ifndef MY_generic_stat_arch_elt
365 #define MY_generic_stat_arch_elt bfd_generic_stat_arch_elt
367 #ifndef MY_slurp_armap
368 #define MY_slurp_armap bfd_slurp_bsd_armap
370 #ifndef MY_slurp_extended_name_table
371 #define MY_slurp_extended_name_table _bfd_slurp_extended_name_table
373 #ifndef MY_construct_extended_name_table
374 #define MY_construct_extended_name_table \
375 _bfd_archive_bsd_construct_extended_name_table
377 #ifndef MY_write_armap
378 #define MY_write_armap bsd_write_armap
380 #ifndef MY_read_ar_hdr
381 #define MY_read_ar_hdr _bfd_generic_read_ar_hdr
383 #ifndef MY_write_ar_hdr
384 #define MY_write_ar_hdr _bfd_generic_write_ar_hdr
386 #ifndef MY_truncate_arname
387 #define MY_truncate_arname bfd_bsd_truncate_arname
389 #ifndef MY_update_armap_timestamp
390 #define MY_update_armap_timestamp _bfd_archive_bsd_update_armap_timestamp
393 /* No core file defined here -- configure in trad-core.c separately. */
394 #ifndef MY_core_file_failing_command
395 #define MY_core_file_failing_command _bfd_nocore_core_file_failing_command
397 #ifndef MY_core_file_failing_signal
398 #define MY_core_file_failing_signal _bfd_nocore_core_file_failing_signal
400 #ifndef MY_core_file_matches_executable_p
401 #define MY_core_file_matches_executable_p \
402 _bfd_nocore_core_file_matches_executable_p
404 #ifndef MY_core_file_p
405 #define MY_core_file_p _bfd_dummy_target
408 #ifndef MY_bfd_debug_info_start
409 #define MY_bfd_debug_info_start bfd_void
411 #ifndef MY_bfd_debug_info_end
412 #define MY_bfd_debug_info_end bfd_void
414 #ifndef MY_bfd_debug_info_accumulate
415 #define MY_bfd_debug_info_accumulate \
416 (void (*) (bfd *, struct bfd_section *)) bfd_void
419 #ifndef MY_core_file_failing_command
420 #define MY_core_file_failing_command NAME (aout, core_file_failing_command)
422 #ifndef MY_core_file_failing_signal
423 #define MY_core_file_failing_signal NAME (aout, core_file_failing_signal)
425 #ifndef MY_core_file_matches_executable_p
426 #define MY_core_file_matches_executable_p NAME (aout, core_file_matches_executable_p)
428 #ifndef MY_set_section_contents
429 #define MY_set_section_contents NAME (aout, set_section_contents)
431 #ifndef MY_get_section_contents
432 #define MY_get_section_contents NAME (aout, get_section_contents)
434 #ifndef MY_get_section_contents_in_window
435 #define MY_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
437 #ifndef MY_new_section_hook
438 #define MY_new_section_hook NAME (aout, new_section_hook)
440 #ifndef MY_get_symtab_upper_bound
441 #define MY_get_symtab_upper_bound NAME (aout, get_symtab_upper_bound)
443 #ifndef MY_canonicalize_symtab
444 #define MY_canonicalize_symtab NAME (aout, canonicalize_symtab)
446 #ifndef MY_get_reloc_upper_bound
447 #define MY_get_reloc_upper_bound NAME (aout,get_reloc_upper_bound)
449 #ifndef MY_canonicalize_reloc
450 #define MY_canonicalize_reloc NAME (aout, canonicalize_reloc)
452 #ifndef MY_make_empty_symbol
453 #define MY_make_empty_symbol NAME (aout, make_empty_symbol)
455 #ifndef MY_print_symbol
456 #define MY_print_symbol NAME (aout, print_symbol)
458 #ifndef MY_get_symbol_info
459 #define MY_get_symbol_info NAME (aout, get_symbol_info)
461 #ifndef MY_get_lineno
462 #define MY_get_lineno NAME (aout, get_lineno)
464 #ifndef MY_set_arch_mach
465 #define MY_set_arch_mach NAME (aout, set_arch_mach)
467 #ifndef MY_find_nearest_line
468 #define MY_find_nearest_line NAME (aout, find_nearest_line)
470 #ifndef MY_find_inliner_info
471 #define MY_find_inliner_info _bfd_nosymbols_find_inliner_info
473 #ifndef MY_sizeof_headers
474 #define MY_sizeof_headers NAME (aout, sizeof_headers)
476 #ifndef MY_bfd_get_relocated_section_contents
477 #define MY_bfd_get_relocated_section_contents \
478 bfd_generic_get_relocated_section_contents
480 #ifndef MY_bfd_relax_section
481 #define MY_bfd_relax_section bfd_generic_relax_section
483 #ifndef MY_bfd_gc_sections
484 #define MY_bfd_gc_sections bfd_generic_gc_sections
486 #ifndef MY_bfd_merge_sections
487 #define MY_bfd_merge_sections bfd_generic_merge_sections
489 #ifndef MY_bfd_is_group_section
490 #define MY_bfd_is_group_section bfd_generic_is_group_section
492 #ifndef MY_bfd_discard_group
493 #define MY_bfd_discard_group bfd_generic_discard_group
495 #ifndef MY_section_already_linked
496 #define MY_section_already_linked \
497 _bfd_generic_section_already_linked
499 #ifndef MY_bfd_define_common_symbol
500 #define MY_bfd_define_common_symbol bfd_generic_define_common_symbol
502 #ifndef MY_bfd_reloc_type_lookup
503 #define MY_bfd_reloc_type_lookup NAME (aout, reloc_type_lookup)
505 #ifndef MY_bfd_reloc_name_lookup
506 #define MY_bfd_reloc_name_lookup NAME (aout, reloc_name_lookup)
508 #ifndef MY_bfd_make_debug_symbol
509 #define MY_bfd_make_debug_symbol 0
511 #ifndef MY_read_minisymbols
512 #define MY_read_minisymbols NAME (aout, read_minisymbols)
514 #ifndef MY_minisymbol_to_symbol
515 #define MY_minisymbol_to_symbol NAME (aout, minisymbol_to_symbol)
517 #ifndef MY_bfd_link_hash_table_create
518 #define MY_bfd_link_hash_table_create NAME (aout, link_hash_table_create)
520 #ifndef MY_bfd_link_hash_table_free
521 #define MY_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
523 #ifndef MY_bfd_link_add_symbols
524 #define MY_bfd_link_add_symbols NAME (aout, link_add_symbols)
526 #ifndef MY_bfd_link_just_syms
527 #define MY_bfd_link_just_syms _bfd_generic_link_just_syms
529 #ifndef MY_bfd_copy_link_hash_symbol_type
530 #define MY_bfd_copy_link_hash_symbol_type \
531 _bfd_generic_copy_link_hash_symbol_type
533 #ifndef MY_bfd_link_split_section
534 #define MY_bfd_link_split_section _bfd_generic_link_split_section
537 #ifndef MY_bfd_copy_private_bfd_data
538 #define MY_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
541 #ifndef MY_bfd_merge_private_bfd_data
542 #define MY_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
545 #ifndef MY_bfd_copy_private_symbol_data
546 #define MY_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
549 #ifndef MY_bfd_copy_private_header_data
550 #define MY_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
553 #ifndef MY_bfd_print_private_bfd_data
554 #define MY_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
557 #ifndef MY_bfd_set_private_flags
558 #define MY_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
561 #ifndef MY_bfd_is_local_label_name
562 #define MY_bfd_is_local_label_name bfd_generic_is_local_label_name
565 #ifndef MY_bfd_is_target_special_symbol
566 #define MY_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
569 #ifndef MY_bfd_free_cached_info
570 #define MY_bfd_free_cached_info NAME (aout, bfd_free_cached_info)
573 #ifndef MY_close_and_cleanup
574 #define MY_close_and_cleanup MY_bfd_free_cached_info
577 #ifndef MY_get_dynamic_symtab_upper_bound
578 #define MY_get_dynamic_symtab_upper_bound \
579 _bfd_nodynamic_get_dynamic_symtab_upper_bound
581 #ifndef MY_canonicalize_dynamic_symtab
582 #define MY_canonicalize_dynamic_symtab \
583 _bfd_nodynamic_canonicalize_dynamic_symtab
585 #ifndef MY_get_synthetic_symtab
586 #define MY_get_synthetic_symtab \
587 _bfd_nodynamic_get_synthetic_symtab
589 #ifndef MY_get_dynamic_reloc_upper_bound
590 #define MY_get_dynamic_reloc_upper_bound \
591 _bfd_nodynamic_get_dynamic_reloc_upper_bound
593 #ifndef MY_canonicalize_dynamic_reloc
594 #define MY_canonicalize_dynamic_reloc \
595 _bfd_nodynamic_canonicalize_dynamic_reloc
598 /* Aout symbols normally have leading underscores. */
599 #ifndef MY_symbol_leading_char
600 #define MY_symbol_leading_char '_'
603 /* Aout archives normally use spaces for padding. */
605 #define AR_PAD_CHAR ' '
608 #ifndef MY_BFD_TARGET
609 const bfd_target MY (vec) =
611 TARGETNAME, /* Name. */
612 bfd_target_aout_flavour,
613 #ifdef TARGET_IS_BIG_ENDIAN_P
614 BFD_ENDIAN_BIG, /* Target byte order (big). */
615 BFD_ENDIAN_BIG, /* Target headers byte order (big). */
617 BFD_ENDIAN_LITTLE, /* Target byte order (little). */
618 BFD_ENDIAN_LITTLE, /* Target headers byte order (little). */
620 (HAS_RELOC | EXEC_P | /* Object flags. */
621 HAS_LINENO | HAS_DEBUG |
622 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
623 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
624 MY_symbol_leading_char,
625 AR_PAD_CHAR, /* AR_pad_char. */
626 15, /* AR_max_namelen. */
627 #ifdef TARGET_IS_BIG_ENDIAN_P
628 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
629 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
630 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* Data. */
631 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
632 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
633 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* Headers. */
635 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
636 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
637 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */
638 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
639 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
640 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Headers. */
642 {_bfd_dummy_target, MY_object_p, /* bfd_check_format. */
643 bfd_generic_archive_p, MY_core_file_p},
644 {bfd_false, MY_mkobject, /* bfd_set_format. */
645 _bfd_generic_mkarchive, bfd_false},
646 {bfd_false, MY_write_object_contents, /* bfd_write_contents. */
647 _bfd_write_archive_contents, bfd_false},
649 BFD_JUMP_TABLE_GENERIC (MY),
650 BFD_JUMP_TABLE_COPY (MY),
651 BFD_JUMP_TABLE_CORE (MY),
652 BFD_JUMP_TABLE_ARCHIVE (MY),
653 BFD_JUMP_TABLE_SYMBOLS (MY),
654 BFD_JUMP_TABLE_RELOCS (MY),
655 BFD_JUMP_TABLE_WRITE (MY),
656 BFD_JUMP_TABLE_LINK (MY),
657 BFD_JUMP_TABLE_DYNAMIC (MY),
659 /* Alternative_target. */
664 #endif /* MY_BFD_TARGET */