1 /* Define a target vector and some small routines for a variant of a.out.
2 Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #include "aout/aout64.h"
22 #include "aout/stab_gnu.h"
24 /*#include "libaout.h"*/
27 #define SEGMENT_SIZE TARGET_PAGE_SIZE
30 extern reloc_howto_type
* NAME(aout
,reloc_type_lookup
)
31 PARAMS ((bfd
*, bfd_reloc_code_real_type
));
33 /* Set parameters about this a.out file that are machine-dependent.
34 This routine is called from some_aout_object_p just before it returns. */
37 static const bfd_target
*MY(callback
) PARAMS ((bfd
*));
39 static const bfd_target
*
43 struct internal_exec
*execp
= exec_hdr (abfd
);
44 unsigned int arch_align_power
;
45 unsigned long arch_align
;
47 /* Calculate the file positions of the parts of a newly read aout header */
48 obj_textsec (abfd
)->_raw_size
= N_TXTSIZE(*execp
);
50 /* The virtual memory addresses of the sections */
51 obj_textsec (abfd
)->vma
= N_TXTADDR(*execp
);
52 obj_datasec (abfd
)->vma
= N_DATADDR(*execp
);
53 obj_bsssec (abfd
)->vma
= N_BSSADDR(*execp
);
55 /* For some targets, if the entry point is not in the same page
56 as the start of the text, then adjust the VMA so that it is.
57 FIXME: Do this with a macro like SET_ARCH_MACH instead? */
58 if (aout_backend_info (abfd
)->entry_is_text_address
59 && execp
->a_entry
> obj_textsec (abfd
)->vma
)
63 adjust
= execp
->a_entry
- obj_textsec (abfd
)->vma
;
64 /* Adjust only by whole pages. */
65 adjust
&= ~(TARGET_PAGE_SIZE
- 1);
66 obj_textsec (abfd
)->vma
+= adjust
;
67 obj_datasec (abfd
)->vma
+= adjust
;
68 obj_bsssec (abfd
)->vma
+= adjust
;
71 /* Set the load addresses to be the same as the virtual addresses. */
72 obj_textsec (abfd
)->lma
= obj_textsec (abfd
)->vma
;
73 obj_datasec (abfd
)->lma
= obj_datasec (abfd
)->vma
;
74 obj_bsssec (abfd
)->lma
= obj_bsssec (abfd
)->vma
;
76 /* The file offsets of the sections */
77 obj_textsec (abfd
)->filepos
= N_TXTOFF (*execp
);
78 obj_datasec (abfd
)->filepos
= N_DATOFF (*execp
);
80 /* The file offsets of the relocation info */
81 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF(*execp
);
82 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF(*execp
);
84 /* The file offsets of the string table and symbol table. */
85 obj_sym_filepos (abfd
) = N_SYMOFF (*execp
);
86 obj_str_filepos (abfd
) = N_STROFF (*execp
);
88 /* Determine the architecture and machine type of the object file. */
90 SET_ARCH_MACH(abfd
, *execp
);
92 bfd_default_set_arch_mach(abfd
, DEFAULT_ARCH
, 0);
95 /* The number of relocation records. This must be called after
96 SET_ARCH_MACH. It assumes that SET_ARCH_MACH will set
97 obj_reloc_entry_size correctly, if the reloc size is not
99 obj_textsec (abfd
)->reloc_count
=
100 execp
->a_trsize
/ obj_reloc_entry_size (abfd
);
101 obj_datasec (abfd
)->reloc_count
=
102 execp
->a_drsize
/ obj_reloc_entry_size (abfd
);
104 /* Now that we know the architecture, set the alignments of the
105 sections. This is normally done by NAME(aout,new_section_hook),
106 but when the initial sections were created the architecture had
107 not yet been set. However, for backward compatibility, we don't
108 set the alignment power any higher than as required by the size
110 arch_align_power
= bfd_get_arch_info (abfd
)->section_align_power
;
111 arch_align
= 1 << arch_align_power
;
112 if ((BFD_ALIGN (obj_textsec (abfd
)->_raw_size
, arch_align
)
113 == obj_textsec (abfd
)->_raw_size
)
114 && (BFD_ALIGN (obj_datasec (abfd
)->_raw_size
, arch_align
)
115 == obj_datasec (abfd
)->_raw_size
)
116 && (BFD_ALIGN (obj_bsssec (abfd
)->_raw_size
, arch_align
)
117 == obj_bsssec (abfd
)->_raw_size
))
119 obj_textsec (abfd
)->alignment_power
= arch_align_power
;
120 obj_datasec (abfd
)->alignment_power
= arch_align_power
;
121 obj_bsssec (abfd
)->alignment_power
= arch_align_power
;
124 /* Don't set sizes now -- can't be sure until we know arch & mach.
125 Sizes get set in set_sizes callback, later. */
127 adata(abfd
).page_size
= TARGET_PAGE_SIZE
;
128 adata(abfd
).segment_size
= SEGMENT_SIZE
;
129 adata(abfd
).exec_bytes_size
= EXEC_BYTES_SIZE
;
137 /* Finish up the reading of an a.out file header */
139 static const bfd_target
*MY(object_p
) PARAMS ((bfd
*));
141 static const bfd_target
*
145 struct external_exec exec_bytes
; /* Raw exec header from file */
146 struct internal_exec exec
; /* Cleaned-up exec header */
147 const bfd_target
*target
;
149 if (bfd_read ((PTR
) &exec_bytes
, 1, EXEC_BYTES_SIZE
, abfd
)
150 != EXEC_BYTES_SIZE
) {
151 if (bfd_get_error () != bfd_error_system_call
)
152 bfd_set_error (bfd_error_wrong_format
);
157 exec
.a_info
= SWAP_MAGIC (exec_bytes
.e_info
);
159 exec
.a_info
= bfd_h_get_32 (abfd
, exec_bytes
.e_info
);
160 #endif /* SWAP_MAGIC */
162 if (N_BADMAG (exec
)) return 0;
164 if (!(MACHTYPE_OK (N_MACHTYPE (exec
)))) return 0;
167 NAME(aout
,swap_exec_header_in
)(abfd
, &exec_bytes
, &exec
);
170 /* swap_exec_header_in read in a_info with the wrong byte order */
171 exec
.a_info
= SWAP_MAGIC (exec_bytes
.e_info
);
172 #endif /* SWAP_MAGIC */
174 target
= NAME(aout
,some_aout_object_p
) (abfd
, &exec
, MY(callback
));
176 #ifdef ENTRY_CAN_BE_ZERO
177 /* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
178 * means that it isn't obvious if EXEC_P should be set.
179 * All of the following must be true for an executable:
180 * There must be no relocations, the bfd can be neither an
181 * archive nor an archive element, and the file must be executable. */
183 if (exec
.a_trsize
+ exec
.a_drsize
== 0
184 && bfd_get_format(abfd
) == bfd_object
&& abfd
->my_archive
== NULL
)
188 #define S_IXUSR 0100 /* Execute by owner. */
190 if (stat(abfd
->filename
, &buf
) == 0 && (buf
.st_mode
& S_IXUSR
))
191 abfd
->flags
|= EXEC_P
;
193 #endif /* ENTRY_CAN_BE_ZERO */
197 #define MY_object_p MY(object_p)
203 static boolean
MY(mkobject
) PARAMS ((bfd
*));
209 if (NAME(aout
,mkobject
)(abfd
) == false)
211 #if 0 /* Sizes get set in set_sizes callback, later, after we know
212 the architecture and machine. */
213 adata(abfd
).page_size
= TARGET_PAGE_SIZE
;
214 adata(abfd
).segment_size
= SEGMENT_SIZE
;
215 adata(abfd
).exec_bytes_size
= EXEC_BYTES_SIZE
;
219 #define MY_mkobject MY(mkobject)
222 #ifndef MY_bfd_copy_private_section_data
224 /* Copy private section data. This actually does nothing with the
225 sections. It copies the subformat field. We copy it here, because
226 we need to know whether this is a QMAGIC file before we set the
227 section contents, and copy_private_bfd_data is not called until
228 after the section contents have been set. */
230 static boolean MY_bfd_copy_private_section_data
231 PARAMS ((bfd
*, asection
*, bfd
*, asection
*));
235 MY_bfd_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
237 asection
*isec ATTRIBUTE_UNUSED
;
239 asection
*osec ATTRIBUTE_UNUSED
;
241 if (bfd_get_flavour (ibfd
) == bfd_target_aout_flavour
242 && bfd_get_flavour (obfd
) == bfd_target_aout_flavour
)
243 obj_aout_subformat (obfd
) = obj_aout_subformat (ibfd
);
249 /* Write an object file.
250 Section contents have already been written. We write the
251 file header, symbols, and relocation. */
253 #ifndef MY_write_object_contents
255 MY(write_object_contents
) (abfd
)
258 struct external_exec exec_bytes
;
259 struct internal_exec
*execp
= exec_hdr (abfd
);
261 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
263 WRITE_HEADERS(abfd
, execp
);
267 #define MY_write_object_contents MY(write_object_contents)
272 static boolean
MY(set_sizes
) PARAMS ((bfd
*));
278 adata(abfd
).page_size
= TARGET_PAGE_SIZE
;
279 adata(abfd
).segment_size
= SEGMENT_SIZE
;
281 #ifdef ZMAGIC_DISK_BLOCK_SIZE
282 adata(abfd
).zmagic_disk_block_size
= ZMAGIC_DISK_BLOCK_SIZE
;
284 adata(abfd
).zmagic_disk_block_size
= TARGET_PAGE_SIZE
;
287 adata(abfd
).exec_bytes_size
= EXEC_BYTES_SIZE
;
290 #define MY_set_sizes MY(set_sizes)
293 #ifndef MY_exec_hdr_flags
294 #define MY_exec_hdr_flags 0
297 #ifndef MY_backend_data
299 #ifndef MY_zmagic_contiguous
300 #define MY_zmagic_contiguous 0
302 #ifndef MY_text_includes_header
303 #define MY_text_includes_header 0
305 #ifndef MY_entry_is_text_address
306 #define MY_entry_is_text_address 0
308 #ifndef MY_exec_header_not_counted
309 #define MY_exec_header_not_counted 0
311 #ifndef MY_add_dynamic_symbols
312 #define MY_add_dynamic_symbols 0
314 #ifndef MY_add_one_symbol
315 #define MY_add_one_symbol 0
317 #ifndef MY_link_dynamic_object
318 #define MY_link_dynamic_object 0
320 #ifndef MY_write_dynamic_symbol
321 #define MY_write_dynamic_symbol 0
323 #ifndef MY_check_dynamic_reloc
324 #define MY_check_dynamic_reloc 0
326 #ifndef MY_finish_dynamic_link
327 #define MY_finish_dynamic_link 0
330 static CONST
struct aout_backend_data
MY(backend_data
) = {
331 MY_zmagic_contiguous
,
332 MY_text_includes_header
,
333 MY_entry_is_text_address
,
337 MY_exec_header_not_counted
,
338 MY_add_dynamic_symbols
,
340 MY_link_dynamic_object
,
341 MY_write_dynamic_symbol
,
342 MY_check_dynamic_reloc
,
343 MY_finish_dynamic_link
345 #define MY_backend_data &MY(backend_data)
348 #ifndef MY_final_link_callback
350 /* Callback for the final_link routine to set the section offsets. */
352 static void MY_final_link_callback
353 PARAMS ((bfd
*, file_ptr
*, file_ptr
*, file_ptr
*));
356 MY_final_link_callback (abfd
, ptreloff
, pdreloff
, psymoff
)
362 struct internal_exec
*execp
= exec_hdr (abfd
);
364 *ptreloff
= N_TRELOFF (*execp
);
365 *pdreloff
= N_DRELOFF (*execp
);
366 *psymoff
= N_SYMOFF (*execp
);
371 #ifndef MY_bfd_final_link
373 /* Final link routine. We need to use a call back to get the correct
374 offsets in the output file. */
376 static boolean MY_bfd_final_link
PARAMS ((bfd
*, struct bfd_link_info
*));
379 MY_bfd_final_link (abfd
, info
)
381 struct bfd_link_info
*info
;
383 return NAME(aout
,final_link
) (abfd
, info
, MY_final_link_callback
);
388 /* We assume BFD generic archive files. */
389 #ifndef MY_openr_next_archived_file
390 #define MY_openr_next_archived_file bfd_generic_openr_next_archived_file
392 #ifndef MY_get_elt_at_index
393 #define MY_get_elt_at_index _bfd_generic_get_elt_at_index
395 #ifndef MY_generic_stat_arch_elt
396 #define MY_generic_stat_arch_elt bfd_generic_stat_arch_elt
398 #ifndef MY_slurp_armap
399 #define MY_slurp_armap bfd_slurp_bsd_armap
401 #ifndef MY_slurp_extended_name_table
402 #define MY_slurp_extended_name_table _bfd_slurp_extended_name_table
404 #ifndef MY_construct_extended_name_table
405 #define MY_construct_extended_name_table \
406 _bfd_archive_bsd_construct_extended_name_table
408 #ifndef MY_write_armap
409 #define MY_write_armap bsd_write_armap
411 #ifndef MY_read_ar_hdr
412 #define MY_read_ar_hdr _bfd_generic_read_ar_hdr
414 #ifndef MY_truncate_arname
415 #define MY_truncate_arname bfd_bsd_truncate_arname
417 #ifndef MY_update_armap_timestamp
418 #define MY_update_armap_timestamp _bfd_archive_bsd_update_armap_timestamp
421 /* No core file defined here -- configure in trad-core.c separately. */
422 #ifndef MY_core_file_failing_command
423 #define MY_core_file_failing_command _bfd_nocore_core_file_failing_command
425 #ifndef MY_core_file_failing_signal
426 #define MY_core_file_failing_signal _bfd_nocore_core_file_failing_signal
428 #ifndef MY_core_file_matches_executable_p
429 #define MY_core_file_matches_executable_p \
430 _bfd_nocore_core_file_matches_executable_p
432 #ifndef MY_core_file_p
433 #define MY_core_file_p _bfd_dummy_target
436 #ifndef MY_bfd_debug_info_start
437 #define MY_bfd_debug_info_start bfd_void
439 #ifndef MY_bfd_debug_info_end
440 #define MY_bfd_debug_info_end bfd_void
442 #ifndef MY_bfd_debug_info_accumulate
443 #define MY_bfd_debug_info_accumulate \
444 (void (*) PARAMS ((bfd*, struct sec *))) bfd_void
447 #ifndef MY_core_file_failing_command
448 #define MY_core_file_failing_command NAME(aout,core_file_failing_command)
450 #ifndef MY_core_file_failing_signal
451 #define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
453 #ifndef MY_core_file_matches_executable_p
454 #define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
456 #ifndef MY_set_section_contents
457 #define MY_set_section_contents NAME(aout,set_section_contents)
459 #ifndef MY_get_section_contents
460 #define MY_get_section_contents NAME(aout,get_section_contents)
462 #ifndef MY_get_section_contents_in_window
463 #define MY_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
465 #ifndef MY_new_section_hook
466 #define MY_new_section_hook NAME(aout,new_section_hook)
468 #ifndef MY_get_symtab_upper_bound
469 #define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
471 #ifndef MY_get_symtab
472 #define MY_get_symtab NAME(aout,get_symtab)
474 #ifndef MY_get_reloc_upper_bound
475 #define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
477 #ifndef MY_canonicalize_reloc
478 #define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
480 #ifndef MY_make_empty_symbol
481 #define MY_make_empty_symbol NAME(aout,make_empty_symbol)
483 #ifndef MY_print_symbol
484 #define MY_print_symbol NAME(aout,print_symbol)
486 #ifndef MY_get_symbol_info
487 #define MY_get_symbol_info NAME(aout,get_symbol_info)
489 #ifndef MY_get_lineno
490 #define MY_get_lineno NAME(aout,get_lineno)
492 #ifndef MY_set_arch_mach
493 #define MY_set_arch_mach NAME(aout,set_arch_mach)
495 #ifndef MY_find_nearest_line
496 #define MY_find_nearest_line NAME(aout,find_nearest_line)
498 #ifndef MY_sizeof_headers
499 #define MY_sizeof_headers NAME(aout,sizeof_headers)
501 #ifndef MY_bfd_get_relocated_section_contents
502 #define MY_bfd_get_relocated_section_contents \
503 bfd_generic_get_relocated_section_contents
505 #ifndef MY_bfd_relax_section
506 #define MY_bfd_relax_section bfd_generic_relax_section
508 #ifndef MY_bfd_gc_sections
509 #define MY_bfd_gc_sections bfd_generic_gc_sections
511 #ifndef MY_bfd_reloc_type_lookup
512 #define MY_bfd_reloc_type_lookup NAME(aout,reloc_type_lookup)
514 #ifndef MY_bfd_make_debug_symbol
515 #define MY_bfd_make_debug_symbol 0
517 #ifndef MY_read_minisymbols
518 #define MY_read_minisymbols NAME(aout,read_minisymbols)
520 #ifndef MY_minisymbol_to_symbol
521 #define MY_minisymbol_to_symbol NAME(aout,minisymbol_to_symbol)
523 #ifndef MY_bfd_link_hash_table_create
524 #define MY_bfd_link_hash_table_create NAME(aout,link_hash_table_create)
526 #ifndef MY_bfd_link_add_symbols
527 #define MY_bfd_link_add_symbols NAME(aout,link_add_symbols)
529 #ifndef MY_bfd_link_split_section
530 #define MY_bfd_link_split_section _bfd_generic_link_split_section
534 #ifndef MY_bfd_copy_private_bfd_data
535 #define MY_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
538 #ifndef MY_bfd_merge_private_bfd_data
539 #define MY_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
542 #ifndef MY_bfd_copy_private_symbol_data
543 #define MY_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
546 #ifndef MY_bfd_print_private_bfd_data
547 #define MY_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
550 #ifndef MY_bfd_set_private_flags
551 #define MY_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
554 #ifndef MY_bfd_is_local_label_name
555 #define MY_bfd_is_local_label_name bfd_generic_is_local_label_name
558 #ifndef MY_bfd_free_cached_info
559 #define MY_bfd_free_cached_info NAME(aout,bfd_free_cached_info)
562 #ifndef MY_close_and_cleanup
563 #define MY_close_and_cleanup MY_bfd_free_cached_info
566 #ifndef MY_get_dynamic_symtab_upper_bound
567 #define MY_get_dynamic_symtab_upper_bound \
568 _bfd_nodynamic_get_dynamic_symtab_upper_bound
570 #ifndef MY_canonicalize_dynamic_symtab
571 #define MY_canonicalize_dynamic_symtab \
572 _bfd_nodynamic_canonicalize_dynamic_symtab
574 #ifndef MY_get_dynamic_reloc_upper_bound
575 #define MY_get_dynamic_reloc_upper_bound \
576 _bfd_nodynamic_get_dynamic_reloc_upper_bound
578 #ifndef MY_canonicalize_dynamic_reloc
579 #define MY_canonicalize_dynamic_reloc \
580 _bfd_nodynamic_canonicalize_dynamic_reloc
583 /* Aout symbols normally have leading underscores */
584 #ifndef MY_symbol_leading_char
585 #define MY_symbol_leading_char '_'
588 /* Aout archives normally use spaces for padding */
590 #define AR_PAD_CHAR ' '
593 #ifndef MY_BFD_TARGET
594 const bfd_target
MY(vec
) =
596 TARGETNAME
, /* name */
597 bfd_target_aout_flavour
,
598 #ifdef TARGET_IS_BIG_ENDIAN_P
599 BFD_ENDIAN_BIG
, /* target byte order (big) */
600 BFD_ENDIAN_BIG
, /* target headers byte order (big) */
602 BFD_ENDIAN_LITTLE
, /* target byte order (little) */
603 BFD_ENDIAN_LITTLE
, /* target headers byte order (little) */
605 (HAS_RELOC
| EXEC_P
| /* object flags */
606 HAS_LINENO
| HAS_DEBUG
|
607 HAS_SYMS
| HAS_LOCALS
| DYNAMIC
| WP_TEXT
| D_PAGED
),
608 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
| SEC_CODE
| SEC_DATA
),
609 MY_symbol_leading_char
,
610 AR_PAD_CHAR
, /* ar_pad_char */
611 15, /* ar_max_namelen */
612 #ifdef TARGET_IS_BIG_ENDIAN_P
613 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
614 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
615 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* data */
616 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
617 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
618 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* hdrs */
620 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
621 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
622 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
623 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
624 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
625 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* hdrs */
627 {_bfd_dummy_target
, MY_object_p
, /* bfd_check_format */
628 bfd_generic_archive_p
, MY_core_file_p
},
629 {bfd_false
, MY_mkobject
, /* bfd_set_format */
630 _bfd_generic_mkarchive
, bfd_false
},
631 {bfd_false
, MY_write_object_contents
, /* bfd_write_contents */
632 _bfd_write_archive_contents
, bfd_false
},
634 BFD_JUMP_TABLE_GENERIC (MY
),
635 BFD_JUMP_TABLE_COPY (MY
),
636 BFD_JUMP_TABLE_CORE (MY
),
637 BFD_JUMP_TABLE_ARCHIVE (MY
),
638 BFD_JUMP_TABLE_SYMBOLS (MY
),
639 BFD_JUMP_TABLE_RELOCS (MY
),
640 BFD_JUMP_TABLE_WRITE (MY
),
641 BFD_JUMP_TABLE_LINK (MY
),
642 BFD_JUMP_TABLE_DYNAMIC (MY
),
644 /* Alternative_target */
647 (PTR
) MY_backend_data
649 #endif /* MY_BFD_TARGET */