1/* Generic target-file-type support for the BFD library.
2   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
4   Free Software Foundation, Inc.
5   Written by Cygnus Support.
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,
22   MA 02110-1301, USA.  */
23
24#include "sysdep.h"
25#include "bfd.h"
26#include "libbfd.h"
27#include "fnmatch.h"
28
29/*
30   It's okay to see some:
31#if 0
32   directives in this source file, as targets.c uses them to exclude
33   certain BFD vectors.  This comment is specially formatted to catch
34   users who grep for ^#if 0, so please keep it this way!
35*/
36
37/*
38SECTION
39	Targets
40
41DESCRIPTION
42	Each port of BFD to a different machine requires the creation
43	of a target back end. All the back end provides to the root
44	part of BFD is a structure containing pointers to functions
45	which perform certain low level operations on files. BFD
46	translates the applications's requests through a pointer into
47	calls to the back end routines.
48
49	When a file is opened with <<bfd_openr>>, its format and
50	target are unknown. BFD uses various mechanisms to determine
51	how to interpret the file. The operations performed are:
52
53	o Create a BFD by calling the internal routine
54	<<_bfd_new_bfd>>, then call <<bfd_find_target>> with the
55	target string supplied to <<bfd_openr>> and the new BFD pointer.
56
57	o If a null target string was provided to <<bfd_find_target>>,
58	look up the environment variable <<GNUTARGET>> and use
59	that as the target string.
60
61	o If the target string is still <<NULL>>, or the target string is
62	<<default>>, then use the first item in the target vector
63	as the target type, and set <<target_defaulted>> in the BFD to
64	cause <<bfd_check_format>> to loop through all the targets.
65	@xref{bfd_target}.  @xref{Formats}.
66
67	o Otherwise, inspect the elements in the target vector
68	one by one, until a match on target name is found. When found,
69	use it.
70
71	o Otherwise return the error <<bfd_error_invalid_target>> to
72	<<bfd_openr>>.
73
74	o <<bfd_openr>> attempts to open the file using
75	<<bfd_open_file>>, and returns the BFD.
76
77	Once the BFD has been opened and the target selected, the file
78	format may be determined. This is done by calling
79	<<bfd_check_format>> on the BFD with a suggested format.
80	If <<target_defaulted>> has been set, each possible target
81	type is tried to see if it recognizes the specified format.
82	<<bfd_check_format>> returns <<TRUE>> when the caller guesses right.
83@menu
84@* bfd_target::
85@end menu
86*/
87
88/*
89
90INODE
91	bfd_target,  , Targets, Targets
92DOCDD
93SUBSECTION
94	bfd_target
95
96DESCRIPTION
97	This structure contains everything that BFD knows about a
98	target. It includes things like its byte order, name, and which
99	routines to call to do various operations.
100
101	Every BFD points to a target structure with its <<xvec>>
102	member.
103
104	The macros below are used to dispatch to functions through the
105	<<bfd_target>> vector. They are used in a number of macros further
106	down in @file{bfd.h}, and are also used when calling various
107	routines by hand inside the BFD implementation.  The @var{arglist}
108	argument must be parenthesized; it contains all the arguments
109	to the called function.
110
111	They make the documentation (more) unpleasant to read, so if
112	someone wants to fix this and not break the above, please do.
113
114.#define BFD_SEND(bfd, message, arglist) \
115.  ((*((bfd)->xvec->message)) arglist)
116.
117.#ifdef DEBUG_BFD_SEND
118.#undef BFD_SEND
119.#define BFD_SEND(bfd, message, arglist) \
120.  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
121.    ((*((bfd)->xvec->message)) arglist) : \
122.    (bfd_assert (__FILE__,__LINE__), NULL))
123.#endif
124
125	For operations which index on the BFD format:
126
127.#define BFD_SEND_FMT(bfd, message, arglist) \
128.  (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist)
129.
130.#ifdef DEBUG_BFD_SEND
131.#undef BFD_SEND_FMT
132.#define BFD_SEND_FMT(bfd, message, arglist) \
133.  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
134.   (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist) : \
135.   (bfd_assert (__FILE__,__LINE__), NULL))
136.#endif
137.
138	This is the structure which defines the type of BFD this is.  The
139	<<xvec>> member of the struct <<bfd>> itself points here.  Each
140	module that implements access to a different target under BFD,
141	defines one of these.
142
143	FIXME, these names should be rationalised with the names of
144	the entry points which call them. Too bad we can't have one
145	macro to define them both!
146
147.enum bfd_flavour
148.{
149.  bfd_target_unknown_flavour,
150.  bfd_target_aout_flavour,
151.  bfd_target_coff_flavour,
152.  bfd_target_ecoff_flavour,
153.  bfd_target_xcoff_flavour,
154.  bfd_target_elf_flavour,
155.  bfd_target_ieee_flavour,
156.  bfd_target_nlm_flavour,
157.  bfd_target_oasys_flavour,
158.  bfd_target_tekhex_flavour,
159.  bfd_target_srec_flavour,
160.  bfd_target_ihex_flavour,
161.  bfd_target_som_flavour,
162.  bfd_target_os9k_flavour,
163.  bfd_target_versados_flavour,
164.  bfd_target_msdos_flavour,
165.  bfd_target_ovax_flavour,
166.  bfd_target_evax_flavour,
167.  bfd_target_mmo_flavour,
168.  bfd_target_mach_o_flavour,
169.  bfd_target_pef_flavour,
170.  bfd_target_pef_xlib_flavour,
171.  bfd_target_sym_flavour
172.};
173.
174.enum bfd_endian { BFD_ENDIAN_BIG, BFD_ENDIAN_LITTLE, BFD_ENDIAN_UNKNOWN };
175.
176.{* Forward declaration.  *}
177.typedef struct bfd_link_info _bfd_link_info;
178.
179.typedef struct bfd_target
180.{
181.  {* Identifies the kind of target, e.g., SunOS4, Ultrix, etc.  *}
182.  char *name;
183.
184. {* The "flavour" of a back end is a general indication about
185.    the contents of a file.  *}
186.  enum bfd_flavour flavour;
187.
188.  {* The order of bytes within the data area of a file.  *}
189.  enum bfd_endian byteorder;
190.
191. {* The order of bytes within the header parts of a file.  *}
192.  enum bfd_endian header_byteorder;
193.
194.  {* A mask of all the flags which an executable may have set -
195.     from the set <<BFD_NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.  *}
196.  flagword object_flags;
197.
198. {* A mask of all the flags which a section may have set - from
199.    the set <<SEC_NO_FLAGS>>, <<SEC_ALLOC>>, ...<<SET_NEVER_LOAD>>.  *}
200.  flagword section_flags;
201.
202. {* The character normally found at the front of a symbol.
203.    (if any), perhaps `_'.  *}
204.  char symbol_leading_char;
205.
206. {* The pad character for file names within an archive header.  *}
207.  char ar_pad_char;
208.
209.  {* The maximum number of characters in an archive header.  *}
210.  unsigned short ar_max_namelen;
211.
212.  {* Entries for byte swapping for data. These are different from the
213.     other entry points, since they don't take a BFD as the first argument.
214.     Certain other handlers could do the same.  *}
215.  bfd_uint64_t   (*bfd_getx64) (const void *);
216.  bfd_int64_t    (*bfd_getx_signed_64) (const void *);
217.  void           (*bfd_putx64) (bfd_uint64_t, void *);
218.  bfd_vma        (*bfd_getx32) (const void *);
219.  bfd_signed_vma (*bfd_getx_signed_32) (const void *);
220.  void           (*bfd_putx32) (bfd_vma, void *);
221.  bfd_vma        (*bfd_getx16) (const void *);
222.  bfd_signed_vma (*bfd_getx_signed_16) (const void *);
223.  void           (*bfd_putx16) (bfd_vma, void *);
224.
225.  {* Byte swapping for the headers.  *}
226.  bfd_uint64_t   (*bfd_h_getx64) (const void *);
227.  bfd_int64_t    (*bfd_h_getx_signed_64) (const void *);
228.  void           (*bfd_h_putx64) (bfd_uint64_t, void *);
229.  bfd_vma        (*bfd_h_getx32) (const void *);
230.  bfd_signed_vma (*bfd_h_getx_signed_32) (const void *);
231.  void           (*bfd_h_putx32) (bfd_vma, void *);
232.  bfd_vma        (*bfd_h_getx16) (const void *);
233.  bfd_signed_vma (*bfd_h_getx_signed_16) (const void *);
234.  void           (*bfd_h_putx16) (bfd_vma, void *);
235.
236.  {* Format dependent routines: these are vectors of entry points
237.     within the target vector structure, one for each format to check.  *}
238.
239.  {* Check the format of a file being read.  Return a <<bfd_target *>> or zero.  *}
240.  const struct bfd_target *(*_bfd_check_format[bfd_type_end]) (bfd *);
241.
242.  {* Set the format of a file being written.  *}
243.  bfd_boolean (*_bfd_set_format[bfd_type_end]) (bfd *);
244.
245.  {* Write cached information into a file being written, at <<bfd_close>>.  *}
246.  bfd_boolean (*_bfd_write_contents[bfd_type_end]) (bfd *);
247.
248The general target vector.  These vectors are initialized using the
249BFD_JUMP_TABLE macros.
250.
251.  {* Generic entry points.  *}
252.#define BFD_JUMP_TABLE_GENERIC(NAME) \
253.  NAME##_close_and_cleanup, \
254.  NAME##_bfd_free_cached_info, \
255.  NAME##_new_section_hook, \
256.  NAME##_get_section_contents, \
257.  NAME##_get_section_contents_in_window
258.
259.  {* Called when the BFD is being closed to do any necessary cleanup.  *}
260.  bfd_boolean (*_close_and_cleanup) (bfd *);
261.  {* Ask the BFD to free all cached information.  *}
262.  bfd_boolean (*_bfd_free_cached_info) (bfd *);
263.  {* Called when a new section is created.  *}
264.  bfd_boolean (*_new_section_hook) (bfd *, sec_ptr);
265.  {* Read the contents of a section.  *}
266.  bfd_boolean (*_bfd_get_section_contents)
267.    (bfd *, sec_ptr, void *, file_ptr, bfd_size_type);
268.  bfd_boolean (*_bfd_get_section_contents_in_window)
269.    (bfd *, sec_ptr, bfd_window *, file_ptr, bfd_size_type);
270.
271.  {* Entry points to copy private data.  *}
272.#define BFD_JUMP_TABLE_COPY(NAME) \
273.  NAME##_bfd_copy_private_bfd_data, \
274.  NAME##_bfd_merge_private_bfd_data, \
275.  _bfd_generic_init_private_section_data, \
276.  NAME##_bfd_copy_private_section_data, \
277.  NAME##_bfd_copy_private_symbol_data, \
278.  NAME##_bfd_copy_private_header_data, \
279.  NAME##_bfd_set_private_flags, \
280.  NAME##_bfd_print_private_bfd_data
281.
282.  {* Called to copy BFD general private data from one object file
283.     to another.  *}
284.  bfd_boolean (*_bfd_copy_private_bfd_data) (bfd *, bfd *);
285.  {* Called to merge BFD general private data from one object file
286.     to a common output file when linking.  *}
287.  bfd_boolean (*_bfd_merge_private_bfd_data) (bfd *, bfd *);
288.  {* Called to initialize BFD private section data from one object file
289.     to another.  *}
290.#define bfd_init_private_section_data(ibfd, isec, obfd, osec, link_info) \
291.  BFD_SEND (obfd, _bfd_init_private_section_data, (ibfd, isec, obfd, osec, link_info))
292.  bfd_boolean (*_bfd_init_private_section_data)
293.    (bfd *, sec_ptr, bfd *, sec_ptr, struct bfd_link_info *);
294.  {* Called to copy BFD private section data from one object file
295.     to another.  *}
296.  bfd_boolean (*_bfd_copy_private_section_data)
297.    (bfd *, sec_ptr, bfd *, sec_ptr);
298.  {* Called to copy BFD private symbol data from one symbol
299.     to another.  *}
300.  bfd_boolean (*_bfd_copy_private_symbol_data)
301.    (bfd *, asymbol *, bfd *, asymbol *);
302.  {* Called to copy BFD private header data from one object file
303.     to another.  *}
304.  bfd_boolean (*_bfd_copy_private_header_data)
305.    (bfd *, bfd *);
306.  {* Called to set private backend flags.  *}
307.  bfd_boolean (*_bfd_set_private_flags) (bfd *, flagword);
308.
309.  {* Called to print private BFD data.  *}
310.  bfd_boolean (*_bfd_print_private_bfd_data) (bfd *, void *);
311.
312.  {* Core file entry points.  *}
313.#define BFD_JUMP_TABLE_CORE(NAME) \
314.  NAME##_core_file_failing_command, \
315.  NAME##_core_file_failing_signal, \
316.  NAME##_core_file_matches_executable_p
317.
318.  char *      (*_core_file_failing_command) (bfd *);
319.  int         (*_core_file_failing_signal) (bfd *);
320.  bfd_boolean (*_core_file_matches_executable_p) (bfd *, bfd *);
321.
322.  {* Archive entry points.  *}
323.#define BFD_JUMP_TABLE_ARCHIVE(NAME) \
324.  NAME##_slurp_armap, \
325.  NAME##_slurp_extended_name_table, \
326.  NAME##_construct_extended_name_table, \
327.  NAME##_truncate_arname, \
328.  NAME##_write_armap, \
329.  NAME##_read_ar_hdr, \
330.  NAME##_openr_next_archived_file, \
331.  NAME##_get_elt_at_index, \
332.  NAME##_generic_stat_arch_elt, \
333.  NAME##_update_armap_timestamp
334.
335.  bfd_boolean (*_bfd_slurp_armap) (bfd *);
336.  bfd_boolean (*_bfd_slurp_extended_name_table) (bfd *);
337.  bfd_boolean (*_bfd_construct_extended_name_table)
338.    (bfd *, char **, bfd_size_type *, const char **);
339.  void        (*_bfd_truncate_arname) (bfd *, const char *, char *);
340.  bfd_boolean (*write_armap)
341.    (bfd *, unsigned int, struct orl *, unsigned int, int);
342.  void *      (*_bfd_read_ar_hdr_fn) (bfd *);
343.  bfd *       (*openr_next_archived_file) (bfd *, bfd *);
344.#define bfd_get_elt_at_index(b,i) BFD_SEND (b, _bfd_get_elt_at_index, (b,i))
345.  bfd *       (*_bfd_get_elt_at_index) (bfd *, symindex);
346.  int         (*_bfd_stat_arch_elt) (bfd *, struct stat *);
347.  bfd_boolean (*_bfd_update_armap_timestamp) (bfd *);
348.
349.  {* Entry points used for symbols.  *}
350.#define BFD_JUMP_TABLE_SYMBOLS(NAME) \
351.  NAME##_get_symtab_upper_bound, \
352.  NAME##_canonicalize_symtab, \
353.  NAME##_make_empty_symbol, \
354.  NAME##_print_symbol, \
355.  NAME##_get_symbol_info, \
356.  NAME##_bfd_is_local_label_name, \
357.  NAME##_bfd_is_target_special_symbol, \
358.  NAME##_get_lineno, \
359.  NAME##_find_nearest_line, \
360.  _bfd_generic_find_line, \
361.  NAME##_find_inliner_info, \
362.  NAME##_bfd_make_debug_symbol, \
363.  NAME##_read_minisymbols, \
364.  NAME##_minisymbol_to_symbol
365.
366.  long        (*_bfd_get_symtab_upper_bound) (bfd *);
367.  long        (*_bfd_canonicalize_symtab)
368.    (bfd *, struct bfd_symbol **);
369.  struct bfd_symbol *
370.              (*_bfd_make_empty_symbol) (bfd *);
371.  void        (*_bfd_print_symbol)
372.    (bfd *, void *, struct bfd_symbol *, bfd_print_symbol_type);
373.#define bfd_print_symbol(b,p,s,e) BFD_SEND (b, _bfd_print_symbol, (b,p,s,e))
374.  void        (*_bfd_get_symbol_info)
375.    (bfd *, struct bfd_symbol *, symbol_info *);
376.#define bfd_get_symbol_info(b,p,e) BFD_SEND (b, _bfd_get_symbol_info, (b,p,e))
377.  bfd_boolean (*_bfd_is_local_label_name) (bfd *, const char *);
378.  bfd_boolean (*_bfd_is_target_special_symbol) (bfd *, asymbol *);
379.  alent *     (*_get_lineno) (bfd *, struct bfd_symbol *);
380.  bfd_boolean (*_bfd_find_nearest_line)
381.    (bfd *, struct bfd_section *, struct bfd_symbol **, bfd_vma,
382.     const char **, const char **, unsigned int *);
383.  bfd_boolean (*_bfd_find_line)
384.    (bfd *, struct bfd_symbol **, struct bfd_symbol *,
385.     const char **, unsigned int *);
386.  bfd_boolean (*_bfd_find_inliner_info)
387.    (bfd *, const char **, const char **, unsigned int *);
388. {* Back-door to allow format-aware applications to create debug symbols
389.    while using BFD for everything else.  Currently used by the assembler
390.    when creating COFF files.  *}
391.  asymbol *   (*_bfd_make_debug_symbol)
392.    (bfd *, void *, unsigned long size);
393.#define bfd_read_minisymbols(b, d, m, s) \
394.  BFD_SEND (b, _read_minisymbols, (b, d, m, s))
395.  long        (*_read_minisymbols)
396.    (bfd *, bfd_boolean, void **, unsigned int *);
397.#define bfd_minisymbol_to_symbol(b, d, m, f) \
398.  BFD_SEND (b, _minisymbol_to_symbol, (b, d, m, f))
399.  asymbol *   (*_minisymbol_to_symbol)
400.    (bfd *, bfd_boolean, const void *, asymbol *);
401.
402.  {* Routines for relocs.  *}
403.#define BFD_JUMP_TABLE_RELOCS(NAME) \
404.  NAME##_get_reloc_upper_bound, \
405.  NAME##_canonicalize_reloc, \
406.  NAME##_bfd_reloc_type_lookup, \
407.  NAME##_bfd_reloc_name_lookup
408.
409.  long        (*_get_reloc_upper_bound) (bfd *, sec_ptr);
410.  long        (*_bfd_canonicalize_reloc)
411.    (bfd *, sec_ptr, arelent **, struct bfd_symbol **);
412.  {* See documentation on reloc types.  *}
413.  reloc_howto_type *
414.              (*reloc_type_lookup) (bfd *, bfd_reloc_code_real_type);
415.  reloc_howto_type *
416.              (*reloc_name_lookup) (bfd *, const char *);
417.
418.
419.  {* Routines used when writing an object file.  *}
420.#define BFD_JUMP_TABLE_WRITE(NAME) \
421.  NAME##_set_arch_mach, \
422.  NAME##_set_section_contents
423.
424.  bfd_boolean (*_bfd_set_arch_mach)
425.    (bfd *, enum bfd_architecture, unsigned long);
426.  bfd_boolean (*_bfd_set_section_contents)
427.    (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
428.
429.  {* Routines used by the linker.  *}
430.#define BFD_JUMP_TABLE_LINK(NAME) \
431.  NAME##_sizeof_headers, \
432.  NAME##_bfd_get_relocated_section_contents, \
433.  NAME##_bfd_relax_section, \
434.  NAME##_bfd_link_hash_table_create, \
435.  NAME##_bfd_link_hash_table_free, \
436.  NAME##_bfd_link_add_symbols, \
437.  NAME##_bfd_link_just_syms, \
438.  NAME##_bfd_final_link, \
439.  NAME##_bfd_link_split_section, \
440.  NAME##_bfd_gc_sections, \
441.  NAME##_bfd_merge_sections, \
442.  NAME##_bfd_is_group_section, \
443.  NAME##_bfd_discard_group, \
444.  NAME##_section_already_linked \
445.
446.  int         (*_bfd_sizeof_headers) (bfd *, struct bfd_link_info *);
447.  bfd_byte *  (*_bfd_get_relocated_section_contents)
448.    (bfd *, struct bfd_link_info *, struct bfd_link_order *,
449.     bfd_byte *, bfd_boolean, struct bfd_symbol **);
450.
451.  bfd_boolean (*_bfd_relax_section)
452.    (bfd *, struct bfd_section *, struct bfd_link_info *, bfd_boolean *);
453.
454.  {* Create a hash table for the linker.  Different backends store
455.     different information in this table.  *}
456.  struct bfd_link_hash_table *
457.              (*_bfd_link_hash_table_create) (bfd *);
458.
459.  {* Release the memory associated with the linker hash table.  *}
460.  void        (*_bfd_link_hash_table_free) (struct bfd_link_hash_table *);
461.
462.  {* Add symbols from this object file into the hash table.  *}
463.  bfd_boolean (*_bfd_link_add_symbols) (bfd *, struct bfd_link_info *);
464.
465.  {* Indicate that we are only retrieving symbol values from this section.  *}
466.  void        (*_bfd_link_just_syms) (asection *, struct bfd_link_info *);
467.
468.  {* Do a link based on the link_order structures attached to each
469.     section of the BFD.  *}
470.  bfd_boolean (*_bfd_final_link) (bfd *, struct bfd_link_info *);
471.
472.  {* Should this section be split up into smaller pieces during linking.  *}
473.  bfd_boolean (*_bfd_link_split_section) (bfd *, struct bfd_section *);
474.
475.  {* Remove sections that are not referenced from the output.  *}
476.  bfd_boolean (*_bfd_gc_sections) (bfd *, struct bfd_link_info *);
477.
478.  {* Attempt to merge SEC_MERGE sections.  *}
479.  bfd_boolean (*_bfd_merge_sections) (bfd *, struct bfd_link_info *);
480.
481.  {* Is this section a member of a group?  *}
482.  bfd_boolean (*_bfd_is_group_section) (bfd *, const struct bfd_section *);
483.
484.  {* Discard members of a group.  *}
485.  bfd_boolean (*_bfd_discard_group) (bfd *, struct bfd_section *);
486.
487.  {* Check if SEC has been already linked during a reloceatable or
488.     final link.  *}
489.  void (*_section_already_linked) (bfd *, struct bfd_section *,
490.				    struct bfd_link_info *);
491.
492.  {* Routines to handle dynamic symbols and relocs.  *}
493.#define BFD_JUMP_TABLE_DYNAMIC(NAME) \
494.  NAME##_get_dynamic_symtab_upper_bound, \
495.  NAME##_canonicalize_dynamic_symtab, \
496.  NAME##_get_synthetic_symtab, \
497.  NAME##_get_dynamic_reloc_upper_bound, \
498.  NAME##_canonicalize_dynamic_reloc
499.
500.  {* Get the amount of memory required to hold the dynamic symbols.  *}
501.  long        (*_bfd_get_dynamic_symtab_upper_bound) (bfd *);
502.  {* Read in the dynamic symbols.  *}
503.  long        (*_bfd_canonicalize_dynamic_symtab)
504.    (bfd *, struct bfd_symbol **);
505.  {* Create synthetized symbols.  *}
506.  long        (*_bfd_get_synthetic_symtab)
507.    (bfd *, long, struct bfd_symbol **, long, struct bfd_symbol **,
508.     struct bfd_symbol **);
509.  {* Get the amount of memory required to hold the dynamic relocs.  *}
510.  long        (*_bfd_get_dynamic_reloc_upper_bound) (bfd *);
511.  {* Read in the dynamic relocs.  *}
512.  long        (*_bfd_canonicalize_dynamic_reloc)
513.    (bfd *, arelent **, struct bfd_symbol **);
514.
515
516A pointer to an alternative bfd_target in case the current one is not
517satisfactory.  This can happen when the target cpu supports both big
518and little endian code, and target chosen by the linker has the wrong
519endianness.  The function open_output() in ld/ldlang.c uses this field
520to find an alternative output format that is suitable.
521
522.  {* Opposite endian version of this target.  *}
523.  const struct bfd_target * alternative_target;
524.
525
526.  {* Data for use by back-end routines, which isn't
527.     generic enough to belong in this structure.  *}
528.  const void *backend_data;
529.
530.} bfd_target;
531.
532*/
533
534/* All known xvecs (even those that don't compile on all systems).
535   Alphabetized for easy reference.
536   They are listed a second time below, since
537   we can't intermix extern's and initializers.  */
538extern const bfd_target a_out_adobe_vec;
539extern const bfd_target aix5coff64_vec;
540extern const bfd_target aout0_big_vec;
541extern const bfd_target aout_arm_big_vec;
542extern const bfd_target aout_arm_little_vec;
543extern const bfd_target aout_mips_big_vec;
544extern const bfd_target aout_mips_little_vec;
545extern const bfd_target apollocoff_vec;
546extern const bfd_target arm_epoc_pe_big_vec;
547extern const bfd_target arm_epoc_pe_little_vec;
548extern const bfd_target arm_epoc_pei_big_vec;
549extern const bfd_target arm_epoc_pei_little_vec;
550extern const bfd_target arm_wince_pe_big_vec;
551extern const bfd_target arm_wince_pe_little_vec;
552extern const bfd_target arm_wince_pei_big_vec;
553extern const bfd_target arm_wince_pei_little_vec;
554extern const bfd_target armcoff_big_vec;
555extern const bfd_target armcoff_little_vec;
556extern const bfd_target armnetbsd_vec;
557extern const bfd_target armpe_big_vec;
558extern const bfd_target armpe_little_vec;
559extern const bfd_target armpei_big_vec;
560extern const bfd_target armpei_little_vec;
561extern const bfd_target b_out_vec_big_host;
562extern const bfd_target b_out_vec_little_host;
563extern const bfd_target bfd_efi_app_ia32_vec;
564extern const bfd_target bfd_efi_app_x86_64_vec;
565extern const bfd_target bfd_efi_app_ia64_vec;
566extern const bfd_target bfd_elf32_avr_vec;
567extern const bfd_target bfd_elf32_bfin_vec;
568extern const bfd_target bfd_elf32_bfinfdpic_vec;
569extern const bfd_target bfd_elf32_big_generic_vec;
570extern const bfd_target bfd_elf32_bigarc_vec;
571extern const bfd_target bfd_elf32_bigarm_vec;
572extern const bfd_target bfd_elf32_bigarm_symbian_vec;
573extern const bfd_target bfd_elf32_bigarm_vxworks_vec;
574extern const bfd_target bfd_elf32_bigmips_vec;
575extern const bfd_target bfd_elf32_bigmips_vxworks_vec;
576extern const bfd_target bfd_elf32_cr16_vec;
577extern const bfd_target bfd_elf32_cr16c_vec;
578extern const bfd_target bfd_elf32_cris_vec;
579extern const bfd_target bfd_elf32_crx_vec;
580extern const bfd_target bfd_elf32_d10v_vec;
581extern const bfd_target bfd_elf32_d30v_vec;
582extern const bfd_target bfd_elf32_dlx_big_vec;
583extern const bfd_target bfd_elf32_fr30_vec;
584extern const bfd_target bfd_elf32_frv_vec;
585extern const bfd_target bfd_elf32_frvfdpic_vec;
586extern const bfd_target bfd_elf32_h8300_vec;
587extern const bfd_target bfd_elf32_hppa_linux_vec;
588extern const bfd_target bfd_elf32_hppa_nbsd_vec;
589extern const bfd_target bfd_elf32_hppa_vec;
590extern const bfd_target bfd_elf32_i370_vec;
591extern const bfd_target bfd_elf32_i386_freebsd_vec;
592extern const bfd_target bfd_elf32_i386_vxworks_vec;
593extern const bfd_target bfd_elf32_i386_vec;
594extern const bfd_target bfd_elf32_i860_little_vec;
595extern const bfd_target bfd_elf32_i860_vec;
596extern const bfd_target bfd_elf32_i960_vec;
597extern const bfd_target bfd_elf32_ia64_big_vec;
598extern const bfd_target bfd_elf32_ia64_hpux_big_vec;
599extern const bfd_target bfd_elf32_ip2k_vec;
600extern const bfd_target bfd_elf32_iq2000_vec;
601extern const bfd_target bfd_elf32_little_generic_vec;
602extern const bfd_target bfd_elf32_littlearc_vec;
603extern const bfd_target bfd_elf32_littlearm_vec;
604extern const bfd_target bfd_elf32_littlearm_symbian_vec;
605extern const bfd_target bfd_elf32_littlearm_vxworks_vec;
606extern const bfd_target bfd_elf32_littlemips_vec;
607extern const bfd_target bfd_elf32_littlemips_vxworks_vec;
608extern const bfd_target bfd_elf32_m32c_vec;
609extern const bfd_target bfd_elf32_m32r_vec;
610extern const bfd_target bfd_elf32_m32rle_vec;
611extern const bfd_target bfd_elf32_m32rlin_vec;
612extern const bfd_target bfd_elf32_m32rlelin_vec;
613extern const bfd_target bfd_elf32_m68hc11_vec;
614extern const bfd_target bfd_elf32_m68hc12_vec;
615extern const bfd_target bfd_elf32_m68k_vec;
616extern const bfd_target bfd_elf32_m88k_vec;
617extern const bfd_target bfd_elf32_mcore_big_vec;
618extern const bfd_target bfd_elf32_mcore_little_vec;
619extern const bfd_target bfd_elf32_mep_vec;
620extern const bfd_target bfd_elf32_mep_little_vec;
621extern const bfd_target bfd_elf32_mn10200_vec;
622extern const bfd_target bfd_elf32_mn10300_vec;
623extern const bfd_target bfd_elf32_mt_vec;
624extern const bfd_target bfd_elf32_msp430_vec;
625extern const bfd_target bfd_elf32_nbigmips_vec;
626extern const bfd_target bfd_elf32_nlittlemips_vec;
627extern const bfd_target bfd_elf32_ntradbigmips_vec;
628extern const bfd_target bfd_elf32_ntradlittlemips_vec;
629extern const bfd_target bfd_elf32_openrisc_vec;
630extern const bfd_target bfd_elf32_or32_big_vec;
631extern const bfd_target bfd_elf32_pj_vec;
632extern const bfd_target bfd_elf32_pjl_vec;
633extern const bfd_target bfd_elf32_powerpc_vec;
634extern const bfd_target bfd_elf32_powerpcle_vec;
635extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
636extern const bfd_target bfd_elf32_s390_vec;
637extern const bfd_target bfd_elf32_bigscore_vec;
638extern const bfd_target bfd_elf32_littlescore_vec;
639extern const bfd_target bfd_elf32_sh64_vec;
640extern const bfd_target bfd_elf32_sh64l_vec;
641extern const bfd_target bfd_elf32_sh64lin_vec;
642extern const bfd_target bfd_elf32_sh64blin_vec;
643extern const bfd_target bfd_elf32_sh64lnbsd_vec;
644extern const bfd_target bfd_elf32_sh64nbsd_vec;
645extern const bfd_target bfd_elf32_sh_vec;
646extern const bfd_target bfd_elf32_shblin_vec;
647extern const bfd_target bfd_elf32_shl_vec;
648extern const bfd_target bfd_elf32_shl_symbian_vec;
649extern const bfd_target bfd_elf32_shlin_vec;
650extern const bfd_target bfd_elf32_shlnbsd_vec;
651extern const bfd_target bfd_elf32_shlvxworks_vec;
652extern const bfd_target bfd_elf32_shnbsd_vec;
653extern const bfd_target bfd_elf32_shvxworks_vec;
654extern const bfd_target bfd_elf32_sparc_vec;
655extern const bfd_target bfd_elf32_sparc_vxworks_vec;
656extern const bfd_target bfd_elf32_spu_vec;
657extern const bfd_target bfd_elf32_tradbigmips_vec;
658extern const bfd_target bfd_elf32_tradlittlemips_vec;
659extern const bfd_target bfd_elf32_us_cris_vec;
660extern const bfd_target bfd_elf32_v850_vec;
661extern const bfd_target bfd_elf32_vax_vec;
662extern const bfd_target bfd_elf32_xc16x_vec;
663extern const bfd_target bfd_elf32_xstormy16_vec;
664extern const bfd_target bfd_elf32_xtensa_be_vec;
665extern const bfd_target bfd_elf32_xtensa_le_vec;
666extern const bfd_target bfd_elf64_alpha_freebsd_vec;
667extern const bfd_target bfd_elf64_alpha_vec;
668extern const bfd_target bfd_elf64_big_generic_vec;
669extern const bfd_target bfd_elf64_bigmips_vec;
670extern const bfd_target bfd_elf64_hppa_linux_vec;
671extern const bfd_target bfd_elf64_hppa_vec;
672extern const bfd_target bfd_elf64_ia64_big_vec;
673extern const bfd_target bfd_elf64_ia64_hpux_big_vec;
674extern const bfd_target bfd_elf64_ia64_little_vec;
675extern const bfd_target bfd_elf64_little_generic_vec;
676extern const bfd_target bfd_elf64_littlemips_vec;
677extern const bfd_target bfd_elf64_mmix_vec;
678extern const bfd_target bfd_elf64_powerpc_vec;
679extern const bfd_target bfd_elf64_powerpcle_vec;
680extern const bfd_target bfd_elf64_s390_vec;
681extern const bfd_target bfd_elf64_sh64_vec;
682extern const bfd_target bfd_elf64_sh64l_vec;
683extern const bfd_target bfd_elf64_sh64lin_vec;
684extern const bfd_target bfd_elf64_sh64blin_vec;
685extern const bfd_target bfd_elf64_sh64lnbsd_vec;
686extern const bfd_target bfd_elf64_sh64nbsd_vec;
687extern const bfd_target bfd_elf64_sparc_vec;
688extern const bfd_target bfd_elf64_sparc_freebsd_vec;
689extern const bfd_target bfd_elf64_tradbigmips_vec;
690extern const bfd_target bfd_elf64_tradlittlemips_vec;
691extern const bfd_target bfd_elf64_x86_64_freebsd_vec;
692extern const bfd_target bfd_elf64_x86_64_vec;
693extern const bfd_target bfd_mmo_vec;
694extern const bfd_target bfd_powerpc_pe_vec;
695extern const bfd_target bfd_powerpc_pei_vec;
696extern const bfd_target bfd_powerpcle_pe_vec;
697extern const bfd_target bfd_powerpcle_pei_vec;
698extern const bfd_target cris_aout_vec;
699extern const bfd_target demo_64_vec;
700extern const bfd_target ecoff_big_vec;
701extern const bfd_target ecoff_biglittle_vec;
702extern const bfd_target ecoff_little_vec;
703extern const bfd_target ecoffalpha_little_vec;
704extern const bfd_target go32coff_vec;
705extern const bfd_target go32stubbedcoff_vec;
706extern const bfd_target h8300coff_vec;
707extern const bfd_target h8500coff_vec;
708extern const bfd_target host_aout_vec;
709extern const bfd_target hp300bsd_vec;
710extern const bfd_target hp300hpux_vec;
711extern const bfd_target i386aout_vec;
712extern const bfd_target i386bsd_vec;
713extern const bfd_target i386coff_vec;
714extern const bfd_target i386dynix_vec;
715extern const bfd_target i386freebsd_vec;
716extern const bfd_target i386linux_vec;
717extern const bfd_target i386lynx_aout_vec;
718extern const bfd_target i386lynx_coff_vec;
719extern const bfd_target i386mach3_vec;
720extern const bfd_target i386msdos_vec;
721extern const bfd_target i386netbsd_vec;
722extern const bfd_target i386os9k_vec;
723extern const bfd_target i386pe_vec;
724extern const bfd_target i386pei_vec;
725extern const bfd_target i860coff_vec;
726extern const bfd_target icoff_big_vec;
727extern const bfd_target icoff_little_vec;
728extern const bfd_target ieee_vec;
729extern const bfd_target m68k4knetbsd_vec;
730extern const bfd_target m68kaux_coff_vec;
731extern const bfd_target m68kcoff_vec;
732extern const bfd_target m68kcoffun_vec;
733extern const bfd_target m68klinux_vec;
734extern const bfd_target m68knetbsd_vec;
735extern const bfd_target m68ksysvcoff_vec;
736extern const bfd_target m88kbcs_vec;
737extern const bfd_target m88kmach3_vec;
738extern const bfd_target m88kopenbsd_vec;
739extern const bfd_target mach_o_be_vec;
740extern const bfd_target mach_o_le_vec;
741extern const bfd_target mach_o_fat_vec;
742extern const bfd_target maxqcoff_vec;
743extern const bfd_target mcore_pe_big_vec;
744extern const bfd_target mcore_pe_little_vec;
745extern const bfd_target mcore_pei_big_vec;
746extern const bfd_target mcore_pei_little_vec;
747extern const bfd_target mipslpe_vec;
748extern const bfd_target mipslpei_vec;
749extern const bfd_target newsos3_vec;
750extern const bfd_target nlm32_alpha_vec;
751extern const bfd_target nlm32_i386_vec;
752extern const bfd_target nlm32_powerpc_vec;
753extern const bfd_target nlm32_sparc_vec;
754extern const bfd_target oasys_vec;
755extern const bfd_target or32coff_big_vec;
756extern const bfd_target pc532machaout_vec;
757extern const bfd_target pc532netbsd_vec;
758extern const bfd_target pdp11_aout_vec;
759extern const bfd_target pef_vec;
760extern const bfd_target pef_xlib_vec;
761extern const bfd_target pmac_xcoff_vec;
762extern const bfd_target ppcboot_vec;
763extern const bfd_target riscix_vec;
764extern const bfd_target rs6000coff64_vec;
765extern const bfd_target rs6000coff_vec;
766extern const bfd_target shcoff_small_vec;
767extern const bfd_target shcoff_vec;
768extern const bfd_target shlcoff_small_vec;
769extern const bfd_target shlcoff_vec;
770extern const bfd_target shlpe_vec;
771extern const bfd_target shlpei_vec;
772extern const bfd_target som_vec;
773extern const bfd_target sparccoff_vec;
774extern const bfd_target sparcle_aout_vec;
775extern const bfd_target sparclinux_vec;
776extern const bfd_target sparclynx_aout_vec;
777extern const bfd_target sparclynx_coff_vec;
778extern const bfd_target sparcnetbsd_vec;
779extern const bfd_target sunos_big_vec;
780extern const bfd_target sym_vec;
781extern const bfd_target tic30_aout_vec;
782extern const bfd_target tic30_coff_vec;
783extern const bfd_target tic4x_coff0_beh_vec;
784extern const bfd_target tic4x_coff0_vec;
785extern const bfd_target tic4x_coff1_beh_vec;
786extern const bfd_target tic4x_coff1_vec;
787extern const bfd_target tic4x_coff2_beh_vec;
788extern const bfd_target tic4x_coff2_vec;
789extern const bfd_target tic54x_coff0_beh_vec;
790extern const bfd_target tic54x_coff0_vec;
791extern const bfd_target tic54x_coff1_beh_vec;
792extern const bfd_target tic54x_coff1_vec;
793extern const bfd_target tic54x_coff2_beh_vec;
794extern const bfd_target tic54x_coff2_vec;
795extern const bfd_target tic80coff_vec;
796extern const bfd_target vaxbsd_vec;
797extern const bfd_target vaxnetbsd_vec;
798extern const bfd_target vax1knetbsd_vec;
799extern const bfd_target versados_vec;
800extern const bfd_target vms_alpha_vec;
801extern const bfd_target vms_vax_vec;
802extern const bfd_target w65_vec;
803extern const bfd_target we32kcoff_vec;
804extern const bfd_target x86_64pe_vec;
805extern const bfd_target x86_64pei_vec;
806extern const bfd_target x86_64coff_vec;
807extern const bfd_target z80coff_vec;
808extern const bfd_target z8kcoff_vec;
809
810/* These are always included.  */
811extern const bfd_target srec_vec;
812extern const bfd_target symbolsrec_vec;
813extern const bfd_target tekhex_vec;
814extern const bfd_target binary_vec;
815extern const bfd_target ihex_vec;
816
817/* All of the xvecs for core files.  */
818extern const bfd_target aix386_core_vec;
819extern const bfd_target cisco_core_big_vec;
820extern const bfd_target cisco_core_little_vec;
821extern const bfd_target hppabsd_core_vec;
822extern const bfd_target hpux_core_vec;
823extern const bfd_target irix_core_vec;
824extern const bfd_target netbsd_core_vec;
825extern const bfd_target osf_core_vec;
826extern const bfd_target ptrace_core_vec;
827extern const bfd_target sco5_core_vec;
828extern const bfd_target trad_core_vec;
829
830extern const bfd_target bfd_elf32_am33lin_vec;
831static const bfd_target * const _bfd_target_vector[] =
832{
833#ifdef SELECT_VECS
834
835	SELECT_VECS,
836
837#else /* not SELECT_VECS */
838
839#ifdef DEFAULT_VECTOR
840	&DEFAULT_VECTOR,
841#endif
842	/* This list is alphabetized to make it easy to compare
843	   with other vector lists -- the decls above and
844	   the case statement in configure.in.
845	   Vectors that don't compile on all systems, or aren't finished,
846	   should have an entry here with #if 0 around it, to show that
847	   it wasn't omitted by mistake.  */
848	&a_out_adobe_vec,
849#ifdef BFD64
850	&aix5coff64_vec,
851#endif
852	&aout0_big_vec,
853#if 0
854	/* We have no way of distinguishing these from other a.out variants.  */
855	&aout_arm_big_vec,
856	&aout_arm_little_vec,
857	/* No one seems to use this.  */
858	&aout_mips_big_vec,
859#endif
860	&aout_mips_little_vec,
861#if 0
862	&apollocoff_vec,
863#endif
864	&arm_epoc_pe_big_vec,
865	&arm_epoc_pe_little_vec,
866	&arm_epoc_pei_big_vec,
867	&arm_epoc_pei_little_vec,
868	&arm_wince_pe_big_vec,
869	&arm_wince_pe_little_vec,
870	&arm_wince_pei_big_vec,
871	&arm_wince_pei_little_vec,
872	&armcoff_big_vec,
873	&armcoff_little_vec,
874	&armnetbsd_vec,
875	&armpe_big_vec,
876	&armpe_little_vec,
877	&armpei_big_vec,
878	&armpei_little_vec,
879	&b_out_vec_big_host,
880	&b_out_vec_little_host,
881	&bfd_efi_app_ia32_vec,
882#ifdef BFD64
883	&bfd_efi_app_x86_64_vec,
884	&bfd_efi_app_ia64_vec,
885#endif
886	&bfd_elf32_avr_vec,
887	&bfd_elf32_bfin_vec,
888	&bfd_elf32_bfinfdpic_vec,
889
890	/* This, and other vectors, may not be used in any *.mt configuration.
891	   But that does not mean they are unnecessary.  If configured with
892	   --enable-targets=all, objdump or gdb should be able to examine
893	   the file even if we don't recognize the machine type.  */
894	&bfd_elf32_big_generic_vec,
895	&bfd_elf32_bigarc_vec,
896	&bfd_elf32_bigarm_vec,
897	&bfd_elf32_bigarm_symbian_vec,
898	&bfd_elf32_bigarm_vxworks_vec,
899	&bfd_elf32_bigmips_vec,
900	&bfd_elf32_bigmips_vxworks_vec,
901	&bfd_elf32_cr16_vec,
902	&bfd_elf32_cr16c_vec,
903	&bfd_elf32_cris_vec,
904	&bfd_elf32_crx_vec,
905	&bfd_elf32_d10v_vec,
906	&bfd_elf32_d30v_vec,
907	&bfd_elf32_dlx_big_vec,
908	&bfd_elf32_fr30_vec,
909	&bfd_elf32_frv_vec,
910	&bfd_elf32_frvfdpic_vec,
911	&bfd_elf32_h8300_vec,
912	&bfd_elf32_hppa_linux_vec,
913	&bfd_elf32_hppa_nbsd_vec,
914	&bfd_elf32_hppa_vec,
915	&bfd_elf32_i370_vec,
916	&bfd_elf32_i386_freebsd_vec,
917	&bfd_elf32_i386_vxworks_vec,
918	&bfd_elf32_i386_vec,
919	&bfd_elf32_i860_little_vec,
920	&bfd_elf32_i860_vec,
921	&bfd_elf32_i960_vec,
922#if 0
923	&bfd_elf32_ia64_big_vec,
924#endif
925#ifdef BFD64
926	&bfd_elf32_ia64_hpux_big_vec,
927#endif
928	&bfd_elf32_ip2k_vec,
929	&bfd_elf32_iq2000_vec,
930	&bfd_elf32_little_generic_vec,
931	&bfd_elf32_littlearc_vec,
932	&bfd_elf32_littlearm_vec,
933	&bfd_elf32_littlearm_symbian_vec,
934	&bfd_elf32_littlearm_vxworks_vec,
935	&bfd_elf32_littlemips_vec,
936	&bfd_elf32_littlemips_vxworks_vec,
937	&bfd_elf32_m32c_vec,
938	&bfd_elf32_m32r_vec,
939        &bfd_elf32_m32rle_vec,
940        &bfd_elf32_m32rlin_vec,
941        &bfd_elf32_m32rlelin_vec,
942	&bfd_elf32_m68hc11_vec,
943	&bfd_elf32_m68hc12_vec,
944	&bfd_elf32_m68k_vec,
945	&bfd_elf32_m88k_vec,
946	&bfd_elf32_mcore_big_vec,
947	&bfd_elf32_mcore_little_vec,
948	&bfd_elf32_mep_vec,
949	&bfd_elf32_mn10200_vec,
950	&bfd_elf32_mn10300_vec,
951	&bfd_elf32_mt_vec,
952	&bfd_elf32_msp430_vec,
953#ifdef BFD64
954	&bfd_elf32_nbigmips_vec,
955	&bfd_elf32_nlittlemips_vec,
956	&bfd_elf32_ntradbigmips_vec,
957	&bfd_elf32_ntradlittlemips_vec,
958#endif
959	&bfd_elf32_openrisc_vec,
960	&bfd_elf32_or32_big_vec,
961	&bfd_elf32_pj_vec,
962	&bfd_elf32_pjl_vec,
963	&bfd_elf32_powerpc_vec,
964	&bfd_elf32_powerpc_vxworks_vec,
965	&bfd_elf32_powerpcle_vec,
966	&bfd_elf32_s390_vec,
967	&bfd_elf32_bigscore_vec,
968	&bfd_elf32_littlescore_vec,
969        &bfd_elf32_sh_vec,
970        &bfd_elf32_shblin_vec,
971        &bfd_elf32_shl_vec,
972        &bfd_elf32_shl_symbian_vec,
973        &bfd_elf32_shlin_vec,
974	&bfd_elf32_shlnbsd_vec,
975	&bfd_elf32_shlvxworks_vec,
976	&bfd_elf32_shnbsd_vec,
977	&bfd_elf32_shvxworks_vec,
978#ifdef BFD64
979	&bfd_elf32_sh64_vec,
980	&bfd_elf32_sh64l_vec,
981	&bfd_elf32_sh64lnbsd_vec,
982	&bfd_elf32_sh64nbsd_vec,
983	&bfd_elf32_sh64lin_vec,
984	&bfd_elf32_sh64blin_vec,
985#endif
986	&bfd_elf32_sparc_vec,
987	&bfd_elf32_sparc_vxworks_vec,
988	&bfd_elf32_spu_vec,
989	&bfd_elf32_tradbigmips_vec,
990	&bfd_elf32_tradlittlemips_vec,
991	&bfd_elf32_us_cris_vec,
992	&bfd_elf32_v850_vec,
993	&bfd_elf32_vax_vec,
994	&bfd_elf32_xc16x_vec,
995	&bfd_elf32_xstormy16_vec,
996	&bfd_elf32_xtensa_be_vec,
997	&bfd_elf32_xtensa_le_vec,
998#ifdef BFD64
999	&bfd_elf64_alpha_freebsd_vec,
1000	&bfd_elf64_alpha_vec,
1001	&bfd_elf64_big_generic_vec,
1002	&bfd_elf64_bigmips_vec,
1003	&bfd_elf64_hppa_linux_vec,
1004	&bfd_elf64_hppa_vec,
1005	&bfd_elf64_ia64_big_vec,
1006	&bfd_elf64_ia64_hpux_big_vec,
1007	&bfd_elf64_ia64_little_vec,
1008	&bfd_elf64_little_generic_vec,
1009	&bfd_elf64_littlemips_vec,
1010	&bfd_elf64_mmix_vec,
1011	&bfd_elf64_powerpc_vec,
1012	&bfd_elf64_powerpcle_vec,
1013	&bfd_elf64_s390_vec,
1014	&bfd_elf64_sh64_vec,
1015	&bfd_elf64_sh64l_vec,
1016	&bfd_elf64_sh64lnbsd_vec,
1017	&bfd_elf64_sh64nbsd_vec,
1018	&bfd_elf64_sh64lin_vec,
1019	&bfd_elf64_sh64blin_vec,
1020	&bfd_elf64_sparc_vec,
1021	&bfd_elf64_sparc_freebsd_vec,
1022	&bfd_elf64_tradbigmips_vec,
1023	&bfd_elf64_tradlittlemips_vec,
1024	&bfd_elf64_x86_64_freebsd_vec,
1025	&bfd_elf64_x86_64_vec,
1026	&bfd_mmo_vec,
1027#endif
1028	&bfd_powerpc_pe_vec,
1029	&bfd_powerpc_pei_vec,
1030	&bfd_powerpcle_pe_vec,
1031	&bfd_powerpcle_pei_vec,
1032	&cris_aout_vec,
1033#ifdef BFD64
1034	&demo_64_vec,	/* Only compiled if host has long-long support.  */
1035#endif
1036	&ecoff_big_vec,
1037	&ecoff_biglittle_vec,
1038	&ecoff_little_vec,
1039#ifdef BFD64
1040	&ecoffalpha_little_vec,
1041#endif
1042	&go32coff_vec,
1043	&go32stubbedcoff_vec,
1044	&h8300coff_vec,
1045	&h8500coff_vec,
1046#if 0
1047	/* Since a.out files lack decent magic numbers, no way to recognize
1048	   which kind of a.out file it is.  */
1049	&host_aout_vec,
1050	/* Clashes with sunos_big_vec magic no.  */
1051	&hp300bsd_vec,
1052#endif
1053	&hp300hpux_vec,
1054	&i386aout_vec,
1055	&i386bsd_vec,
1056	&i386coff_vec,
1057#if 0
1058	&i386dynix_vec,
1059#endif
1060	&i386freebsd_vec,
1061#if 0
1062	/* Since a.out files lack decent magic numbers, no way to recognize
1063	   which kind of a.out file it is.  */
1064	&i386linux_vec,
1065#endif
1066	&i386lynx_aout_vec,
1067	&i386lynx_coff_vec,
1068#if 0
1069	/* No distinguishing features for Mach 3 executables.  */
1070	&i386mach3_vec,
1071#endif
1072	&i386msdos_vec,
1073	&i386netbsd_vec,
1074	&i386os9k_vec,
1075	&i386pe_vec,
1076	&i386pei_vec,
1077#ifdef BFD64
1078	&x86_64coff_vec,
1079	&x86_64pe_vec,
1080	&x86_64pei_vec,
1081#endif
1082	&i860coff_vec,
1083	&icoff_big_vec,
1084	&icoff_little_vec,
1085	&ieee_vec,
1086#if 0
1087	&m68k4knetbsd_vec,
1088	&m68kaux_coff_vec,
1089#endif
1090	&m68kcoff_vec,
1091	&m68kcoffun_vec,
1092#if 0
1093	/* Since a.out files lack decent magic numbers, no way to recognize
1094	   which kind of a.out file it is.  */
1095	&m68klinux_vec,
1096#endif
1097	&m68knetbsd_vec,
1098	&m68ksysvcoff_vec,
1099	&m88kbcs_vec,
1100	&m88kmach3_vec,
1101	&m88kopenbsd_vec,
1102	&mach_o_be_vec,
1103	&mach_o_le_vec,
1104	&mach_o_fat_vec,
1105	&maxqcoff_vec,
1106	&mcore_pe_big_vec,
1107	&mcore_pe_little_vec,
1108	&mcore_pei_big_vec,
1109	&mcore_pei_little_vec,
1110	&mipslpe_vec,
1111	&mipslpei_vec,
1112	&newsos3_vec,
1113#ifdef BFD64
1114	&nlm32_alpha_vec,
1115#endif
1116	&nlm32_i386_vec,
1117	&nlm32_powerpc_vec,
1118	&nlm32_sparc_vec,
1119#if 0
1120	/* We have no oasys tools anymore, so we can't test any of this
1121	   anymore. If you want to test the stuff yourself, go ahead...
1122	   steve@cygnus.com
1123	   Worse, since there is no magic number for archives, there
1124	   can be annoying target mis-matches.  */
1125	&oasys_vec,
1126#endif
1127	/* Entry for the OpenRISC family.  */
1128	&or32coff_big_vec,
1129
1130	&pc532machaout_vec,
1131	&pc532netbsd_vec,
1132	&pdp11_aout_vec,
1133	&pef_vec,
1134	&pef_xlib_vec,
1135#if 0
1136	/* This has the same magic number as RS/6000.  */
1137	&pmac_xcoff_vec,
1138#endif
1139	&ppcboot_vec,
1140#if 0
1141	/* We have no way of distinguishing these from other a.out variants.  */
1142	&riscix_vec,
1143#endif
1144#ifdef BFD64
1145	&rs6000coff64_vec,
1146#endif
1147	&rs6000coff_vec,
1148	&shcoff_small_vec,
1149	&shcoff_vec,
1150	&shlcoff_small_vec,
1151	&shlcoff_vec,
1152	&shlpe_vec,
1153	&shlpei_vec,
1154#if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
1155	&som_vec,
1156#endif
1157	&sparccoff_vec,
1158	&sparcle_aout_vec,
1159	&sparclinux_vec,
1160	&sparclynx_aout_vec,
1161	&sparclynx_coff_vec,
1162	&sparcnetbsd_vec,
1163	&sunos_big_vec,
1164	&sym_vec,
1165	&tic30_aout_vec,
1166	&tic30_coff_vec,
1167	&tic54x_coff0_beh_vec,
1168	&tic54x_coff0_vec,
1169	&tic54x_coff1_beh_vec,
1170	&tic54x_coff1_vec,
1171	&tic54x_coff2_beh_vec,
1172	&tic54x_coff2_vec,
1173	&tic80coff_vec,
1174	&vaxbsd_vec,
1175	&vaxnetbsd_vec,
1176	&vax1knetbsd_vec,
1177	&versados_vec,
1178#ifdef BFD64
1179	&vms_alpha_vec,
1180#endif
1181	&vms_vax_vec,
1182	&w65_vec,
1183	&we32kcoff_vec,
1184	&z80coff_vec,
1185	&z8kcoff_vec,
1186	&bfd_elf32_am33lin_vec,
1187#endif /* not SELECT_VECS */
1188
1189/* Always support S-records, for convenience.  */
1190	&srec_vec,
1191	&symbolsrec_vec,
1192/* And tekhex */
1193	&tekhex_vec,
1194/* Likewise for binary output.  */
1195	&binary_vec,
1196/* Likewise for ihex.  */
1197	&ihex_vec,
1198
1199/* Add any required traditional-core-file-handler.  */
1200
1201#ifdef AIX386_CORE
1202	&aix386_core_vec,
1203#endif
1204#if 0
1205	/* We don't include cisco_core_*_vec.  Although it has a magic number,
1206	   the magic number isn't at the beginning of the file, and thus
1207	   might spuriously match other kinds of files.  */
1208	&cisco_core_big_vec,
1209	&cisco_core_little_vec,
1210#endif
1211#ifdef HPPABSD_CORE
1212	&hppabsd_core_vec,
1213#endif
1214#ifdef HPUX_CORE
1215	&hpux_core_vec,
1216#endif
1217#ifdef IRIX_CORE
1218	&irix_core_vec,
1219#endif
1220#ifdef NETBSD_CORE
1221	&netbsd_core_vec,
1222#endif
1223#ifdef OSF_CORE
1224	&osf_core_vec,
1225#endif
1226#ifdef PTRACE_CORE
1227	&ptrace_core_vec,
1228#endif
1229#ifdef SCO5_CORE
1230	&sco5_core_vec,
1231#endif
1232#ifdef TRAD_CORE
1233	&trad_core_vec,
1234#endif
1235
1236	NULL /* end of list marker */
1237};
1238const bfd_target * const *bfd_target_vector = _bfd_target_vector;
1239
1240/* bfd_default_vector[0] contains either the address of the default vector,
1241   if there is one, or zero if there isn't.  */
1242
1243const bfd_target *bfd_default_vector[] = {
1244#ifdef DEFAULT_VECTOR
1245	&DEFAULT_VECTOR,
1246#endif
1247	NULL
1248};
1249
1250/* bfd_associated_vector[] contains the associated target vectors used
1251   to reduce the ambiguity in bfd_check_format_matches.  */
1252
1253static const bfd_target *_bfd_associated_vector[] = {
1254#ifdef ASSOCIATED_VECS
1255	ASSOCIATED_VECS,
1256#endif
1257	NULL
1258};
1259const bfd_target * const *bfd_associated_vector = _bfd_associated_vector;
1260
1261/* When there is an ambiguous match, bfd_check_format_matches puts the
1262   names of the matching targets in an array.  This variable is the maximum
1263   number of entries that the array could possibly need.  */
1264const size_t _bfd_target_vector_entries = sizeof (_bfd_target_vector)/sizeof (*_bfd_target_vector);
1265
1266/* This array maps configuration triplets onto BFD vectors.  */
1267
1268struct targmatch
1269{
1270  /* The configuration triplet.  */
1271  const char *triplet;
1272  /* The BFD vector.  If this is NULL, then the vector is found by
1273     searching forward for the next structure with a non NULL vector
1274     field.  */
1275  const bfd_target *vector;
1276};
1277
1278/* targmatch.h is built by Makefile out of config.bfd.  */
1279static const struct targmatch bfd_target_match[] = {
1280#include "targmatch.h"
1281  { NULL, NULL }
1282};
1283
1284/* Find a target vector, given a name or configuration triplet.  */
1285
1286static const bfd_target *
1287find_target (const char *name)
1288{
1289  const bfd_target * const *target;
1290  const struct targmatch *match;
1291
1292  for (target = &bfd_target_vector[0]; *target != NULL; target++)
1293    if (strcmp (name, (*target)->name) == 0)
1294      return *target;
1295
1296  /* If we couldn't match on the exact name, try matching on the
1297     configuration triplet.  FIXME: We should run the triplet through
1298     config.sub first, but that is hard.  */
1299  for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
1300    {
1301      if (fnmatch (match->triplet, name, 0) == 0)
1302	{
1303	  while (match->vector == NULL)
1304	    ++match;
1305	  return match->vector;
1306	}
1307    }
1308
1309  bfd_set_error (bfd_error_invalid_target);
1310  return NULL;
1311}
1312
1313/*
1314FUNCTION
1315	bfd_set_default_target
1316
1317SYNOPSIS
1318	bfd_boolean bfd_set_default_target (const char *name);
1319
1320DESCRIPTION
1321	Set the default target vector to use when recognizing a BFD.
1322	This takes the name of the target, which may be a BFD target
1323	name or a configuration triplet.
1324*/
1325
1326bfd_boolean
1327bfd_set_default_target (const char *name)
1328{
1329  const bfd_target *target;
1330
1331  if (bfd_default_vector[0] != NULL
1332      && strcmp (name, bfd_default_vector[0]->name) == 0)
1333    return TRUE;
1334
1335  target = find_target (name);
1336  if (target == NULL)
1337    return FALSE;
1338
1339  bfd_default_vector[0] = target;
1340  return TRUE;
1341}
1342
1343/*
1344FUNCTION
1345	bfd_find_target
1346
1347SYNOPSIS
1348	const bfd_target *bfd_find_target (const char *target_name, bfd *abfd);
1349
1350DESCRIPTION
1351	Return a pointer to the transfer vector for the object target
1352	named @var{target_name}.  If @var{target_name} is <<NULL>>,
1353	choose the one in the environment variable <<GNUTARGET>>; if
1354	that is null or not defined, then choose the first entry in the
1355	target list.  Passing in the string "default" or setting the
1356	environment variable to "default" will cause the first entry in
1357	the target list to be returned, and "target_defaulted" will be
1358	set in the BFD if @var{abfd} isn't <<NULL>>.  This causes
1359	<<bfd_check_format>> to loop over all the targets to find the
1360	one that matches the file being read.
1361*/
1362
1363const bfd_target *
1364bfd_find_target (const char *target_name, bfd *abfd)
1365{
1366  const char *targname;
1367  const bfd_target *target;
1368
1369  if (target_name != NULL)
1370    targname = target_name;
1371  else
1372    targname = getenv ("GNUTARGET");
1373
1374  /* This is safe; the vector cannot be null.  */
1375  if (targname == NULL || strcmp (targname, "default") == 0)
1376    {
1377      if (bfd_default_vector[0] != NULL)
1378	target = bfd_default_vector[0];
1379      else
1380	target = bfd_target_vector[0];
1381      if (abfd)
1382	{
1383	  abfd->xvec = target;
1384	  abfd->target_defaulted = TRUE;
1385	}
1386      return target;
1387    }
1388
1389  if (abfd)
1390    abfd->target_defaulted = FALSE;
1391
1392  target = find_target (targname);
1393  if (target == NULL)
1394    return NULL;
1395
1396  if (abfd)
1397    abfd->xvec = target;
1398  return target;
1399}
1400
1401/*
1402FUNCTION
1403	bfd_target_list
1404
1405SYNOPSIS
1406	const char ** bfd_target_list (void);
1407
1408DESCRIPTION
1409	Return a freshly malloced NULL-terminated
1410	vector of the names of all the valid BFD targets. Do not
1411	modify the names.
1412
1413*/
1414
1415const char **
1416bfd_target_list (void)
1417{
1418  int vec_length = 0;
1419  bfd_size_type amt;
1420#if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1421  /* The native compiler on the HP9000/700 has a bug which causes it
1422     to loop endlessly when compiling this file.  This avoids it.  */
1423  volatile
1424#endif
1425  const bfd_target * const *target;
1426  const  char **name_list, **name_ptr;
1427
1428  for (target = &bfd_target_vector[0]; *target != NULL; target++)
1429    vec_length++;
1430
1431  amt = (vec_length + 1) * sizeof (char **);
1432  name_ptr = name_list = bfd_malloc (amt);
1433
1434  if (name_list == NULL)
1435    return NULL;
1436
1437  for (target = &bfd_target_vector[0]; *target != NULL; target++)
1438    if (target == &bfd_target_vector[0]
1439	|| *target != bfd_target_vector[0])
1440      *name_ptr++ = (*target)->name;
1441
1442  *name_ptr = NULL;
1443  return name_list;
1444}
1445
1446/*
1447FUNCTION
1448	bfd_seach_for_target
1449
1450SYNOPSIS
1451	const bfd_target *bfd_search_for_target
1452	  (int (*search_func) (const bfd_target *, void *),
1453	   void *);
1454
1455DESCRIPTION
1456	Return a pointer to the first transfer vector in the list of
1457	transfer vectors maintained by BFD that produces a non-zero
1458	result when passed to the function @var{search_func}.  The
1459	parameter @var{data} is passed, unexamined, to the search
1460	function.
1461*/
1462
1463const bfd_target *
1464bfd_search_for_target (int (*search_func) (const bfd_target *, void *),
1465		       void *data)
1466{
1467  const bfd_target * const *target;
1468
1469  for (target = bfd_target_vector; *target != NULL; target ++)
1470    if (search_func (*target, data))
1471      return *target;
1472
1473  return NULL;
1474}
1475