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A major rewrite to move the bulk of the linker into BFD so that
[thirdparty/binutils-gdb.git] / bfd / aout-target.h
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582bc90a 1/* Define a target vector and some small routines for a variant of a.out.
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2 Copyright (C) 1990-1991 Free Software Foundation, Inc.
3
4This file is part of BFD, the Binary File Descriptor library.
5
6This program is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2 of the License, or
9(at your option) any later version.
10
11This program is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with this program; if not, write to the Free Software
18Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
582bc90a
PB
20#include "aout/aout64.h"
21#include "aout/stab_gnu.h"
22#include "aout/ar.h"
23/*#include "libaout.h"*/
24
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25extern CONST struct reloc_howto_struct * NAME(aout,reloc_type_lookup) ();
26
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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. */
214f8f23 29#ifndef MY_callback
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30static bfd_target *
31DEFUN(MY(callback),(abfd),
32 bfd *abfd)
33{
34 struct internal_exec *execp = exec_hdr (abfd);
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35
36 /* Calculate the file positions of the parts of a newly read aout header */
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37 obj_textsec (abfd)->_raw_size = N_TXTSIZE(*execp);
38
39 /* The virtual memory addresses of the sections */
40 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
41 obj_datasec (abfd)->vma = N_DATADDR(*execp);
42 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
43
44 /* The file offsets of the sections */
45 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
46 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
47
48 /* The file offsets of the relocation info */
49 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
50 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
51
52 /* The file offsets of the string table and symbol table. */
53 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
54 obj_str_filepos (abfd) = N_STROFF (*execp);
55
582bc90a 56 /* Determine the architecture and machine type of the object file. */
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57#ifdef SET_ARCH_MACH
58 SET_ARCH_MACH(abfd, *execp);
59#else
60 bfd_default_set_arch_mach(abfd, DEFAULT_ARCH, 0);
61#endif
62
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63 /* Don't set sizes now -- can't be sure until we know arch & mach.
64 Sizes get set in set_sizes callback, later. */
65#if 0
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66 adata(abfd).page_size = PAGE_SIZE;
67#ifdef SEGMENT_SIZE
68 adata(abfd).segment_size = SEGMENT_SIZE;
69#else
70 adata(abfd).segment_size = PAGE_SIZE;
71#endif
72 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
294eaca4 73#endif
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74
75 return abfd->xvec;
76}
214f8f23 77#endif
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78
79#ifndef MY_object_p
80/* Finish up the reading of an a.out file header */
81
82static bfd_target *
83DEFUN(MY(object_p),(abfd),
84 bfd *abfd)
85{
86 struct external_exec exec_bytes; /* Raw exec header from file */
87 struct internal_exec exec; /* Cleaned-up exec header */
88 bfd_target *target;
89
90 if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
91 != EXEC_BYTES_SIZE) {
92 bfd_error = wrong_format;
93 return 0;
94 }
95
96 exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
97
98 if (N_BADMAG (exec)) return 0;
99
100 NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
101 target = NAME(aout,some_aout_object_p) (abfd, &exec, MY(callback));
102
103#ifdef ENTRY_CAN_BE_ZERO
104 /* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
105 * means that it isn't obvious if EXEC_P should be set.
106 * All of the following must be true for an executable:
107 * There must be no relocations, the bfd can be neither an
108 * archive nor an archive element, and the file must be executable. */
109
110 if (exec.a_trsize + exec.a_drsize == 0
111 && bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
112 {
113 struct stat buf;
114#ifndef S_IXUSR
115#define S_IXUSR 0100 /* Execute by owner. */
116#endif
117 if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
118 abfd->flags |= EXEC_P;
119 }
120#endif /* ENTRY_CAN_BE_ZERO */
121
122 return target;
123}
124#define MY_object_p MY(object_p)
125#endif
126
127
128#ifndef MY_mkobject
129static boolean
130DEFUN(MY(mkobject),(abfd),
131 bfd *abfd)
132{
133 if (NAME(aout,mkobject)(abfd) == false)
134 return false;
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135#if 0 /* Sizes get set in set_sizes callback, later, after we know
136 the architecture and machine. */
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137 adata(abfd).page_size = PAGE_SIZE;
138#ifdef SEGMENT_SIZE
139 adata(abfd).segment_size = SEGMENT_SIZE;
140#else
141 adata(abfd).segment_size = PAGE_SIZE;
142#endif
143 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
294eaca4 144#endif
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145 return true;
146}
147#define MY_mkobject MY(mkobject)
148#endif
149
150/* Write an object file.
151 Section contents have already been written. We write the
152 file header, symbols, and relocation. */
153
154#ifndef MY_write_object_contents
155static boolean
156DEFUN(MY(write_object_contents),(abfd),
157 bfd *abfd)
158{
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159 struct external_exec exec_bytes;
160 struct internal_exec *execp = exec_hdr (abfd);
161
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162#if CHOOSE_RELOC_SIZE
163 CHOOSE_RELOC_SIZE(abfd);
164#else
165 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
166#endif
167
e98e6ec1 168 WRITE_HEADERS(abfd, execp);
582bc90a 169
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170 return true;
171}
172#define MY_write_object_contents MY(write_object_contents)
173#endif
174
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175#ifndef MY_set_sizes
176static boolean
177DEFUN(MY(set_sizes),(abfd), bfd *abfd)
178{
179 adata(abfd).page_size = PAGE_SIZE;
180#ifdef SEGMENT_SIZE
181 adata(abfd).segment_size = SEGMENT_SIZE;
182#else
183 adata(abfd).segment_size = PAGE_SIZE;
184#endif
185 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
186 return true;
187}
188#define MY_set_sizes MY(set_sizes)
189#endif
190
191#ifndef MY_backend_data
192static CONST struct aout_backend_data MY(backend_data) = {
193 0, /* zmagic contiguous */
194 0, /* text incl header */
195 0, /* text vma? */
196 MY_set_sizes,
1f29e30b 197 0, /* exec header is counted */
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198};
199#define MY_backend_data &MY(backend_data)
200#endif
201
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202/* We assume BFD generic archive files. */
203#ifndef MY_openr_next_archived_file
204#define MY_openr_next_archived_file bfd_generic_openr_next_archived_file
205#endif
206#ifndef MY_generic_stat_arch_elt
207#define MY_generic_stat_arch_elt bfd_generic_stat_arch_elt
208#endif
209#ifndef MY_slurp_armap
210#define MY_slurp_armap bfd_slurp_bsd_armap
211#endif
212#ifndef MY_slurp_extended_name_table
582bc90a 213#define MY_slurp_extended_name_table _bfd_slurp_extended_name_table
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214#endif
215#ifndef MY_write_armap
216#define MY_write_armap bsd_write_armap
217#endif
218#ifndef MY_truncate_arname
219#define MY_truncate_arname bfd_bsd_truncate_arname
220#endif
221
222/* No core file defined here -- configure in trad-core.c separately. */
223#ifndef MY_core_file_failing_command
224#define MY_core_file_failing_command _bfd_dummy_core_file_failing_command
225#endif
226#ifndef MY_core_file_failing_signal
227#define MY_core_file_failing_signal _bfd_dummy_core_file_failing_signal
228#endif
229#ifndef MY_core_file_matches_executable_p
230#define MY_core_file_matches_executable_p \
231 _bfd_dummy_core_file_matches_executable_p
232#endif
233#ifndef MY_core_file_p
234#define MY_core_file_p _bfd_dummy_target
235#endif
236
237#ifndef MY_bfd_debug_info_start
238#define MY_bfd_debug_info_start bfd_void
239#endif
240#ifndef MY_bfd_debug_info_end
241#define MY_bfd_debug_info_end bfd_void
242#endif
243#ifndef MY_bfd_debug_info_accumulate
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244#define MY_bfd_debug_info_accumulate \
245 (void (*) PARAMS ((bfd*, struct sec *))) bfd_void
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246#endif
247
248#ifndef MY_core_file_failing_command
249#define MY_core_file_failing_command NAME(aout,core_file_failing_command)
250#endif
251#ifndef MY_core_file_failing_signal
252#define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
253#endif
254#ifndef MY_core_file_matches_executable_p
255#define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
256#endif
257#ifndef MY_slurp_armap
258#define MY_slurp_armap NAME(aout,slurp_armap)
259#endif
260#ifndef MY_slurp_extended_name_table
261#define MY_slurp_extended_name_table NAME(aout,slurp_extended_name_table)
262#endif
263#ifndef MY_truncate_arname
264#define MY_truncate_arname NAME(aout,truncate_arname)
265#endif
266#ifndef MY_write_armap
267#define MY_write_armap NAME(aout,write_armap)
268#endif
269#ifndef MY_close_and_cleanup
270#define MY_close_and_cleanup NAME(aout,close_and_cleanup)
271#endif
272#ifndef MY_set_section_contents
273#define MY_set_section_contents NAME(aout,set_section_contents)
274#endif
275#ifndef MY_get_section_contents
276#define MY_get_section_contents NAME(aout,get_section_contents)
277#endif
278#ifndef MY_new_section_hook
279#define MY_new_section_hook NAME(aout,new_section_hook)
280#endif
281#ifndef MY_get_symtab_upper_bound
282#define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
283#endif
284#ifndef MY_get_symtab
285#define MY_get_symtab NAME(aout,get_symtab)
286#endif
287#ifndef MY_get_reloc_upper_bound
288#define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
289#endif
290#ifndef MY_canonicalize_reloc
291#define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
292#endif
293#ifndef MY_make_empty_symbol
294#define MY_make_empty_symbol NAME(aout,make_empty_symbol)
295#endif
296#ifndef MY_print_symbol
297#define MY_print_symbol NAME(aout,print_symbol)
298#endif
299#ifndef MY_get_lineno
300#define MY_get_lineno NAME(aout,get_lineno)
301#endif
302#ifndef MY_set_arch_mach
303#define MY_set_arch_mach NAME(aout,set_arch_mach)
304#endif
305#ifndef MY_openr_next_archived_file
306#define MY_openr_next_archived_file NAME(aout,openr_next_archived_file)
307#endif
308#ifndef MY_find_nearest_line
309#define MY_find_nearest_line NAME(aout,find_nearest_line)
310#endif
311#ifndef MY_generic_stat_arch_elt
312#define MY_generic_stat_arch_elt NAME(aout,generic_stat_arch_elt)
313#endif
314#ifndef MY_sizeof_headers
315#define MY_sizeof_headers NAME(aout,sizeof_headers)
316#endif
317#ifndef MY_bfd_debug_info_start
318#define MY_bfd_debug_info_start NAME(aout,bfd_debug_info_start)
319#endif
320#ifndef MY_bfd_debug_info_end
321#define MY_bfd_debug_info_end NAME(aout,bfd_debug_info_end)
322#endif
323#ifndef MY_bfd_debug_info_accumulat
324#define MY_bfd_debug_info_accumulat NAME(aout,bfd_debug_info_accumulat)
325#endif
582bc90a 326#ifndef MY_reloc_howto_type_lookup
214f8f23 327#define MY_reloc_howto_type_lookup NAME(aout,reloc_type_lookup)
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328#endif
329#ifndef MY_make_debug_symbol
330#define MY_make_debug_symbol 0
331#endif
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332
333/* Aout symbols normally have leading underscores */
334#ifndef MY_symbol_leading_char
335#define MY_symbol_leading_char '_'
582bc90a 336#endif
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337
338bfd_target MY(vec) =
339{
340 TARGETNAME, /* name */
341 bfd_target_aout_flavour,
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342#ifdef TARGET_IS_BIG_ENDIAN_P
343 true, /* target byte order (big) */
344 true, /* target headers byte order (big) */
345#else
346 false, /* target byte order (little) */
347 false, /* target headers byte order (little) */
348#endif
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349 (HAS_RELOC | EXEC_P | /* object flags */
350 HAS_LINENO | HAS_DEBUG |
351 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
352 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
294eaca4 353 MY_symbol_leading_char,
e98e6ec1 354 ' ', /* ar_pad_char */
582bc90a 355 15, /* ar_max_namelen */
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356 1, /* minimum alignment */
357#ifdef TARGET_IS_BIG_ENDIAN_P
358 _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
359 _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
360#else
361 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
362 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* hdrs */
363#endif
364 {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
365 bfd_generic_archive_p, MY_core_file_p},
366 {bfd_false, MY_mkobject, /* bfd_set_format */
367 _bfd_generic_mkarchive, bfd_false},
368 {bfd_false, MY_write_object_contents, /* bfd_write_contents */
369 _bfd_write_archive_contents, bfd_false},
370
371 MY_core_file_failing_command,
372 MY_core_file_failing_signal,
373 MY_core_file_matches_executable_p,
374 MY_slurp_armap,
375 MY_slurp_extended_name_table,
376 MY_truncate_arname,
377 MY_write_armap,
378 MY_close_and_cleanup,
379 MY_set_section_contents,
380 MY_get_section_contents,
381 MY_new_section_hook,
382 MY_get_symtab_upper_bound,
383 MY_get_symtab,
384 MY_get_reloc_upper_bound,
385 MY_canonicalize_reloc,
386 MY_make_empty_symbol,
387 MY_print_symbol,
388 MY_get_lineno,
389 MY_set_arch_mach,
390 MY_openr_next_archived_file,
391 MY_find_nearest_line,
392 MY_generic_stat_arch_elt,
393 MY_sizeof_headers,
394 MY_bfd_debug_info_start,
395 MY_bfd_debug_info_end,
396 MY_bfd_debug_info_accumulate,
582bc90a
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397 bfd_generic_get_relocated_section_contents,
398 bfd_generic_relax_section,
399 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* COFF stuff?! */
400 MY_reloc_howto_type_lookup,
401 MY_make_debug_symbol,
402 (PTR) MY_backend_data,
e98e6ec1 403};