1 /* BFD back-end data structures for a.out (and similar) files.
2    Copyright (C) 1990-2016 Free Software Foundation, Inc.
3    Written by Cygnus Support.
4 
5    This file is part of BFD, the Binary File Descriptor library.
6 
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 3 of the License, or
10    (at your option) any later version.
11 
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.
16 
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., 51 Franklin Street - Fifth Floor, Boston,
20    MA 02110-1301, USA.  */
21 
22 #ifndef LIBAOUT_H
23 #define LIBAOUT_H
24 
25 /* We try to encapsulate the differences in the various a.out file
26    variants in a few routines, and otherwise share large masses of code.
27    This means we only have to fix bugs in one place, most of the time.  */
28 
29 #include "bfdlink.h"
30 
31 /* Macros for accessing components in an aout header.  */
32 
33 #define H_PUT_64  bfd_h_put_64
34 #define H_PUT_32  bfd_h_put_32
35 #define H_PUT_16  bfd_h_put_16
36 #define H_PUT_8   bfd_h_put_8
37 #define H_PUT_S64 bfd_h_put_signed_64
38 #define H_PUT_S32 bfd_h_put_signed_32
39 #define H_PUT_S16 bfd_h_put_signed_16
40 #define H_PUT_S8  bfd_h_put_signed_8
41 #define H_GET_64  bfd_h_get_64
42 #define H_GET_32  bfd_h_get_32
43 #define H_GET_16  bfd_h_get_16
44 #define H_GET_8   bfd_h_get_8
45 #define H_GET_S64 bfd_h_get_signed_64
46 #define H_GET_S32 bfd_h_get_signed_32
47 #define H_GET_S16 bfd_h_get_signed_16
48 #define H_GET_S8  bfd_h_get_signed_8
49 
50 /* Parameterize the a.out code based on whether it is being built
51    for a 32-bit architecture or a 64-bit architecture.  */
52 /* Do not "beautify" the CONCAT* macro args.  Traditional C will not
53    remove whitespace added here, and thus will fail to concatenate
54    the tokens.  */
55 #if ARCH_SIZE==64
56 #define GET_WORD  H_GET_64
57 #define GET_SWORD H_GET_S64
58 #define GET_MAGIC H_GET_32
59 #define PUT_WORD  H_PUT_64
60 #define PUT_MAGIC H_PUT_32
61 #ifndef NAME
62 #define NAME(x,y) CONCAT3 (x,_64_,y)
63 #endif
64 #define JNAME(x) CONCAT2 (x,_64)
65 #define BYTES_IN_WORD 8
66 #else
67 #if ARCH_SIZE==16
68 #define GET_WORD  H_GET_16
69 #define GET_SWORD H_GET_S16
70 #define GET_MAGIC H_GET_16
71 #define PUT_WORD  H_PUT_16
72 #define PUT_MAGIC H_PUT_16
73 #ifndef NAME
74 #define NAME(x,y) CONCAT3 (x,_16_,y)
75 #endif
76 #define JNAME(x) CONCAT2 (x,_16)
77 #define BYTES_IN_WORD 2
78 #else /* ARCH_SIZE == 32 */
79 #define GET_WORD  H_GET_32
80 #define GET_SWORD H_GET_S32
81 #define GET_MAGIC H_GET_32
82 #define PUT_WORD  H_PUT_32
83 #define PUT_MAGIC H_PUT_32
84 #ifndef NAME
85 #define NAME(x,y) CONCAT3 (x,_32_,y)
86 #endif
87 #define JNAME(x) CONCAT2 (x,_32)
88 #define BYTES_IN_WORD 4
89 #endif /* ARCH_SIZE==32 */
90 #endif /* ARCH_SIZE==64 */
91 
92 /* Declare at file level, since used in parameter lists, which have
93    weird scope.  */
94 struct external_exec;
95 struct external_nlist;
96 struct reloc_ext_external;
97 struct reloc_std_external;
98 
99 /* a.out backend linker hash table entries.  */
100 
101 struct aout_link_hash_entry
102 {
103   struct bfd_link_hash_entry root;
104   /* Whether this symbol has been written out.  */
105   bfd_boolean written;
106   /* Symbol index in output file.  */
107   int indx;
108 };
109 
110 /* a.out backend linker hash table.  */
111 
112 struct aout_link_hash_table
113 {
114   struct bfd_link_hash_table root;
115 };
116 
117 /* Look up an entry in an a.out link hash table.  */
118 
119 #define aout_link_hash_lookup(table, string, create, copy, follow) \
120   ((struct aout_link_hash_entry *) \
121    bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow)))
122 
123 /* Traverse an a.out link hash table.  */
124 
125 #define aout_link_hash_traverse(table, func, info)			\
126   (bfd_link_hash_traverse						\
127    (&(table)->root,							\
128     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func),	\
129     (info)))
130 
131 /* Get the a.out link hash table from the info structure.  This is
132    just a cast.  */
133 
134 #define aout_hash_table(p) ((struct aout_link_hash_table *) ((p)->hash))
135 
136 /* Back-end information for various a.out targets.  */
137 struct aout_backend_data
138 {
139   /* Are ZMAGIC files mapped contiguously?  If so, the text section may
140      need more padding, if the segment size (granularity for memory access
141      control) is larger than the page size.  */
142   unsigned char zmagic_mapped_contiguous;
143   /* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the
144      text section, which starts immediately after the file header.
145      If not, the text section starts on the next page.  */
146   unsigned char text_includes_header;
147 
148   /* If this flag is set, then if the entry address is not in the
149      first SEGMENT_SIZE bytes of the text section, it is taken to be
150      the address of the start of the text section.  This can be useful
151      for kernels.  */
152   unsigned char entry_is_text_address;
153 
154   /* The value to pass to N_SET_FLAGS.  */
155   unsigned char exec_hdr_flags;
156 
157   /* If the text section VMA isn't specified, and we need an absolute
158      address, use this as the default.  If we're producing a relocatable
159      file, zero is always used.  */
160   /* ?? Perhaps a callback would be a better choice?  Will this do anything
161      reasonable for a format that handles multiple CPUs with different
162      load addresses for each?  */
163   bfd_vma default_text_vma;
164 
165   /* Callback for setting the page and segment sizes, if they can't be
166      trivially determined from the architecture.  */
167   bfd_boolean (*set_sizes) (bfd *);
168 
169   /* zmagic files only. For go32, the length of the exec header contributes
170      to the size of the text section in the file for alignment purposes but
171      does *not* get counted in the length of the text section. */
172   unsigned char exec_header_not_counted;
173 
174   /* Callback from the add symbols phase of the linker code to handle
175      a dynamic object.  */
176   bfd_boolean (*add_dynamic_symbols)
177     (bfd *, struct bfd_link_info *, struct external_nlist **,
178      bfd_size_type *, char **);
179 
180   /* Callback from the add symbols phase of the linker code to handle
181      adding a single symbol to the global linker hash table.  */
182   bfd_boolean (*add_one_symbol)
183     (struct bfd_link_info *, bfd *, const char *, flagword,
184      asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean,
185      struct bfd_link_hash_entry **);
186 
187   /* Called to handle linking a dynamic object.  */
188   bfd_boolean (*link_dynamic_object)
189     (struct bfd_link_info *, bfd *);
190 
191   /* Called for each global symbol being written out by the linker.
192      This should write out the dynamic symbol information.  */
193   bfd_boolean (*write_dynamic_symbol)
194     (bfd *, struct bfd_link_info *, struct aout_link_hash_entry *);
195 
196   /* If this callback is not NULL, the linker calls it for each reloc.
197      RELOC is a pointer to the unswapped reloc.  If *SKIP is set to
198      TRUE, the reloc will be skipped.  *RELOCATION may be changed to
199      change the effects of the relocation.  */
200   bfd_boolean (*check_dynamic_reloc)
201     (struct bfd_link_info *info, bfd *input_bfd,
202      asection *input_section, struct aout_link_hash_entry *h,
203      void * reloc, bfd_byte *contents, bfd_boolean *skip,
204      bfd_vma *relocation);
205 
206   /* Called at the end of a link to finish up any dynamic linking
207      information.  */
208   bfd_boolean (*finish_dynamic_link) (bfd *, struct bfd_link_info *);
209 };
210 #define aout_backend_info(abfd) \
211 	((const struct aout_backend_data *)((abfd)->xvec->backend_data))
212 
213 /* This is the layout in memory of a "struct exec" while we process it.
214    All 'lengths' are given as a number of bytes.
215    All 'alignments' are for relinkable files only;  an alignment of
216 	'n' indicates the corresponding segment must begin at an
217 	address that is a multiple of (2**n).  */
218 
219 struct internal_exec
220 {
221   long a_info;			/* Magic number and flags, packed.  */
222   bfd_vma a_text;		/* Length of text, in bytes.  */
223   bfd_vma a_data;		/* Length of data, in bytes.  */
224   bfd_vma a_bss;		/* Length of uninitialized data area in mem.  */
225   bfd_vma a_syms;		/* Length of symbol table data in file.  */
226   bfd_vma a_entry;		/* Start address.  */
227   bfd_vma a_trsize;		/* Length of text's relocation info, in bytes.  */
228   bfd_vma a_drsize;		/* Length of data's relocation info, in bytes.  */
229   /* Added for i960 */
230   bfd_vma a_tload;		/* Text runtime load address.  */
231   bfd_vma a_dload;		/* Data runtime load address.  */
232   unsigned char a_talign;	/* Alignment of text segment.  */
233   unsigned char a_dalign;	/* Alignment of data segment.  */
234   unsigned char a_balign;	/* Alignment of bss segment.  */
235   char a_relaxable;           	/* Enough info for linker relax.  */
236 };
237 
238 /* Magic number is written
239    < MSB          >
240    3130292827262524232221201918171615141312111009080706050403020100
241    < FLAGS        >< MACHINE TYPE ><  MAGIC NUMBER                >  */
242 
243 /* Magic number for NetBSD is
244    <MSB           >
245    3130292827262524232221201918171615141312111009080706050403020100
246    < FLAGS    >< MACHINE TYPE     ><  MAGIC NUMBER                >  */
247 
248 enum machine_type
249 {
250   M_UNKNOWN = 0,
251   M_68010 = 1,
252   M_68020 = 2,
253   M_SPARC = 3,
254   /* Skip a bunch so we don't run into any of SUN's numbers.  */
255   /* Make these up for the ns32k.  */
256   M_NS32032 = (64),	  /* NS32032 running ?  */
257   M_NS32532 = (64 + 5),	  /* NS32532 running mach.  */
258   M_386 = 100,
259   M_29K = 101,            /* AMD 29000.  */
260   M_386_DYNIX = 102,	  /* Sequent running dynix.  */
261   M_ARM = 103,		  /* Advanced Risc Machines ARM.  */
262   M_SPARCLET = 131,	  /* SPARClet = M_SPARC + 128.  */
263   M_386_NETBSD = 134,	  /* NetBSD/i386 binary.  */
264   M_68K_NETBSD = 135,	  /* NetBSD/m68k binary.  */
265   M_68K4K_NETBSD = 136,	  /* NetBSD/m68k4k binary.  */
266   M_532_NETBSD = 137,	  /* NetBSD/ns32k binary.  */
267   M_SPARC_NETBSD = 138,	  /* NetBSD/sparc binary.  */
268   M_PMAX_NETBSD = 139,	  /* NetBSD/pmax (MIPS little-endian) binary.  */
269   M_VAX_NETBSD = 140,	  /* NetBSD/vax binary.  */
270   M_ALPHA_NETBSD = 141,	  /* NetBSD/alpha binary.  */
271   M_ARM6_NETBSD = 143,	  /* NetBSD/arm32 binary.  */
272   M_SPARCLET_1 = 147,	  /* 0x93, reserved.  */
273   M_POWERPC_NETBSD = 149, /* NetBSD/powerpc (big-endian) binary.  */
274   M_VAX4K_NETBSD = 150,	  /* NetBSD/vax 4K pages binary.  */
275   M_MIPS1 = 151,          /* MIPS R2000/R3000 binary.  */
276   M_MIPS2 = 152,          /* MIPS R4000/R6000 binary.  */
277   M_88K_OPENBSD = 153,	  /* OpenBSD/m88k binary.  */
278   M_HPPA_OPENBSD = 154,	  /* OpenBSD/hppa binary.  */
279   M_SPARC64_NETBSD = 156, /* NetBSD/sparc64 binary.  */
280   M_X86_64_NETBSD = 157,  /* NetBSD/amd64 binary.  */
281   M_SPARCLET_2 = 163,	  /* 0xa3, reserved.  */
282   M_SPARCLET_3 = 179,	  /* 0xb3, reserved.  */
283   M_SPARCLET_4 = 195,	  /* 0xc3, reserved.  */
284   M_HP200 = 200,	  /* HP 200 (68010) BSD binary.  */
285   M_HP300 = (300 % 256),  /* HP 300 (68020+68881) BSD binary.  */
286   M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary.  */
287   M_SPARCLET_5 = 211,	  /* 0xd3, reserved.  */
288   M_SPARCLET_6 = 227,	  /* 0xe3, reserved.  */
289 /*M_SPARCLET_7 = 243	 / * 0xf3, reserved.  */
290   M_SPARCLITE_LE = 243,
291   M_CRIS = 255		  /* Axis CRIS binary.  */
292 };
293 
294 #define N_DYNAMIC(execp) ((execp)->a_info & 0x80000000)
295 
296 #ifndef N_MAGIC
297 # define N_MAGIC(execp) ((execp)->a_info & 0xffff)
298 #endif
299 
300 #ifndef N_MACHTYPE
301 # define N_MACHTYPE(execp) ((enum machine_type)(((execp)->a_info >> 16) & 0xff))
302 #endif
303 
304 #ifndef N_FLAGS
305 # define N_FLAGS(execp) (((execp)->a_info >> 24) & 0xff)
306 #endif
307 
308 #ifndef N_SET_INFO
309 # define N_SET_INFO(execp, magic, type, flags) \
310 ((execp)->a_info = ((magic) & 0xffff) \
311  | (((int)(type) & 0xff) << 16) \
312  | (((flags) & 0xff) << 24))
313 #endif
314 
315 #ifndef N_SET_DYNAMIC
316 # define N_SET_DYNAMIC(execp, dynamic) \
317 ((execp)->a_info = (dynamic) ? (long) ((execp)->a_info | 0x80000000) : \
318 ((execp)->a_info & 0x7fffffff))
319 #endif
320 
321 #ifndef N_SET_MAGIC
322 # define N_SET_MAGIC(execp, magic) \
323 ((execp)->a_info = (((execp)->a_info & 0xffff0000) | ((magic) & 0xffff)))
324 #endif
325 
326 #ifndef N_SET_MACHTYPE
327 # define N_SET_MACHTYPE(execp, machtype) \
328 ((execp)->a_info = \
329  ((execp)->a_info & 0xff00ffff) | ((((int) (machtype)) &0xff) << 16))
330 #endif
331 
332 #ifndef N_SET_FLAGS
333 # define N_SET_FLAGS(execp, flags) \
334 ((execp)->a_info = \
335  ((execp)->a_info & 0x00ffffff) | (((flags) & 0xff) << 24))
336 #endif
337 
338 typedef struct aout_symbol
339 {
340   asymbol symbol;
341   short desc;
342   char other;
343   unsigned char type;
344 } aout_symbol_type;
345 
346 /* The `tdata' struct for all a.out-like object file formats.
347    Various things depend on this struct being around any time an a.out
348    file is being handled.  An example is dbxread.c in GDB.  */
349 
350 enum aout_subformat {
351   default_format = 0,
352   /* Used on HP 9000/300 running HP/UX.  See hp300hpux.c.  */
353   gnu_encap_format,
354   /* Used on Linux, 386BSD, etc.  See include/aout/aout64.h.  */
355   q_magic_format
356 };
357 
358 enum aout_magic {
359   undecided_magic = 0,
360   z_magic,
361   o_magic,
362   n_magic
363 };
364 
365 struct aoutdata
366 {
367   struct internal_exec *hdr;		/* Exec file header.  */
368   aout_symbol_type *symbols;		/* Symtab for input bfd.  */
369 
370   /* For ease, we do this.  */
371   asection *textsec;
372   asection *datasec;
373   asection *bsssec;
374 
375   /* We remember these offsets so that after check_file_format, we have
376      no dependencies on the particular format of the exec_hdr.  */
377   file_ptr sym_filepos;
378   file_ptr str_filepos;
379 
380   /* Size of a relocation entry in external form.  */
381   unsigned reloc_entry_size;
382 
383   /* Size of a symbol table entry in external form.  */
384   unsigned symbol_entry_size;
385 
386   /* Page size - needed for alignment of demand paged files.  */
387   unsigned long page_size;
388 
389   /* Segment size - needed for alignment of demand paged files.  */
390   unsigned long segment_size;
391 
392   /* Zmagic disk block size - need to align the start of the text
393      section in ZMAGIC binaries.  Normally the same as page_size.  */
394   unsigned long zmagic_disk_block_size;
395 
396   unsigned exec_bytes_size;
397   unsigned vma_adjusted : 1;
398 
399   /* Used when a bfd supports several highly similar formats.  */
400   enum aout_subformat subformat;
401 
402   enum aout_magic magic;
403 
404   /* A buffer for find_nearest_line.  */
405   char *line_buf;
406 
407   /* The external symbol information.  */
408   struct external_nlist *external_syms;
409   bfd_size_type external_sym_count;
410   bfd_window sym_window;
411   char *external_strings;
412   bfd_size_type external_string_size;
413   bfd_window string_window;
414   struct aout_link_hash_entry **sym_hashes;
415 
416   /* A pointer for shared library information.  */
417   void * dynamic_info;
418 
419   /* A mapping from local symbols to offsets into the global offset
420      table, used when linking on SunOS.  This is indexed by the symbol
421      index.  */
422   bfd_vma *local_got_offsets;
423 };
424 
425 struct  aout_data_struct
426 {
427   struct aoutdata a;
428   struct internal_exec e;
429 };
430 
431 #define	adata(bfd)		           ((bfd)->tdata.aout_data->a)
432 #define	exec_hdr(bfd)		           (adata (bfd).hdr)
433 #define	obj_aout_symbols(bfd)	           (adata (bfd).symbols)
434 #define	obj_textsec(bfd)	           (adata (bfd).textsec)
435 #define	obj_datasec(bfd)	           (adata (bfd).datasec)
436 #define	obj_bsssec(bfd)		           (adata (bfd).bsssec)
437 #define	obj_sym_filepos(bfd)	           (adata (bfd).sym_filepos)
438 #define	obj_str_filepos(bfd)	           (adata (bfd).str_filepos)
439 #define	obj_reloc_entry_size(bfd)          (adata (bfd).reloc_entry_size)
440 #define	obj_symbol_entry_size(bfd)         (adata (bfd).symbol_entry_size)
441 #define obj_aout_subformat(bfd)	           (adata (bfd).subformat)
442 #define obj_aout_external_syms(bfd)        (adata (bfd).external_syms)
443 #define obj_aout_external_sym_count(bfd)   (adata (bfd).external_sym_count)
444 #define obj_aout_sym_window(bfd)           (adata (bfd).sym_window)
445 #define obj_aout_external_strings(bfd)     (adata (bfd).external_strings)
446 #define obj_aout_external_string_size(bfd) (adata (bfd).external_string_size)
447 #define obj_aout_string_window(bfd)        (adata (bfd).string_window)
448 #define obj_aout_sym_hashes(bfd)           (adata (bfd).sym_hashes)
449 #define obj_aout_dynamic_info(bfd)         (adata (bfd).dynamic_info)
450 
451 /* We take the address of the first element of an asymbol to ensure that the
452    macro is only ever applied to an asymbol.  */
453 #define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))
454 
455 /* Information we keep for each a.out section.  This is currently only
456    used by the a.out backend linker.  */
457 
458 struct aout_section_data_struct
459 {
460   /* The unswapped relocation entries for this section.  */
461   void * relocs;
462 };
463 
464 #define aout_section_data(s) \
465   ((struct aout_section_data_struct *) (s)->used_by_bfd)
466 
467 #define set_aout_section_data(s,v) \
468   ((s)->used_by_bfd = (void *)&(v)->relocs)
469 
470 /* Prototype declarations for functions defined in aoutx.h.  */
471 
472 extern bfd_boolean NAME (aout, squirt_out_relocs)
473   (bfd *, asection *);
474 
475 extern bfd_boolean NAME (aout, make_sections)
476   (bfd *);
477 
478 extern const bfd_target * NAME (aout, some_aout_object_p)
479   (bfd *, struct internal_exec *, const bfd_target *(*) (bfd *));
480 
481 extern bfd_boolean NAME (aout, mkobject)
482   (bfd *);
483 
484 extern enum machine_type NAME (aout, machine_type)
485   (enum bfd_architecture, unsigned long, bfd_boolean *);
486 
487 extern bfd_boolean NAME (aout, set_arch_mach)
488   (bfd *, enum bfd_architecture, unsigned long);
489 
490 extern bfd_boolean NAME (aout, new_section_hook)
491   (bfd *, asection *);
492 
493 extern bfd_boolean NAME (aout, set_section_contents)
494   (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
495 
496 extern asymbol * NAME (aout, make_empty_symbol)
497   (bfd *);
498 
499 extern bfd_boolean NAME (aout, translate_symbol_table)
500   (bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type,
501 	   char *, bfd_size_type, bfd_boolean);
502 
503 extern bfd_boolean NAME (aout, slurp_symbol_table)
504   (bfd *);
505 
506 extern bfd_boolean NAME (aout, write_syms)
507   (bfd *);
508 
509 extern void NAME (aout, reclaim_symbol_table)
510   (bfd *);
511 
512 extern long NAME (aout, get_symtab_upper_bound)
513   (bfd *);
514 
515 extern long NAME (aout, canonicalize_symtab)
516   (bfd *, asymbol **);
517 
518 extern void NAME (aout, swap_ext_reloc_in)
519   (bfd *, struct reloc_ext_external *, arelent *, asymbol **,
520    bfd_size_type);
521 
522 extern void NAME (aout, swap_std_reloc_in)
523   (bfd *, struct reloc_std_external *, arelent *, asymbol **,
524    bfd_size_type);
525 
526 extern reloc_howto_type * NAME (aout, reloc_type_lookup)
527   (bfd *, bfd_reloc_code_real_type);
528 
529 extern reloc_howto_type * NAME (aout, reloc_name_lookup)
530   (bfd *, const char *);
531 
532 extern bfd_boolean NAME (aout, slurp_reloc_table)
533   (bfd *, sec_ptr, asymbol **);
534 
535 extern long NAME (aout, canonicalize_reloc)
536   (bfd *, sec_ptr, arelent **, asymbol **);
537 
538 extern long NAME (aout, get_reloc_upper_bound)
539   (bfd *, sec_ptr);
540 
541 extern void NAME (aout, reclaim_reloc)
542   (bfd *, sec_ptr);
543 
544 extern alent * NAME (aout, get_lineno)
545   (bfd *, asymbol *);
546 
547 extern void NAME (aout, print_symbol)
548   (bfd *, void *, asymbol *, bfd_print_symbol_type);
549 
550 extern void NAME (aout, get_symbol_info)
551   (bfd *, asymbol *, symbol_info *);
552 
553 extern bfd_boolean NAME (aout, find_nearest_line)
554   (bfd *, asymbol **, asection *, bfd_vma,
555    const char **, const char **, unsigned int *, unsigned int *);
556 
557 extern long NAME (aout, read_minisymbols)
558   (bfd *, bfd_boolean, void * *, unsigned int *);
559 
560 extern asymbol * NAME (aout, minisymbol_to_symbol)
561   (bfd *, bfd_boolean, const void *, asymbol *);
562 
563 extern int NAME (aout, sizeof_headers)
564   (bfd *, struct bfd_link_info *);
565 
566 extern bfd_boolean NAME (aout, adjust_sizes_and_vmas)
567   (bfd *);
568 
569 extern void NAME (aout, swap_exec_header_in)
570   (bfd *, struct external_exec *, struct internal_exec *);
571 
572 extern void NAME (aout, swap_exec_header_out)
573   (bfd *, struct internal_exec *, struct external_exec *);
574 
575 extern struct bfd_hash_entry * NAME (aout, link_hash_newfunc)
576   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
577 
578 extern bfd_boolean NAME (aout, link_hash_table_init)
579   (struct aout_link_hash_table *, bfd *,
580    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
581 			       struct bfd_hash_table *,
582 			       const char *),
583    unsigned int);
584 
585 extern struct bfd_link_hash_table * NAME (aout, link_hash_table_create)
586   (bfd *);
587 
588 extern bfd_boolean NAME (aout, link_add_symbols)
589   (bfd *, struct bfd_link_info *);
590 
591 extern bfd_boolean NAME (aout, final_link)
592   (bfd *, struct bfd_link_info *,
593    void (*) (bfd *, file_ptr *, file_ptr *, file_ptr *));
594 
595 extern bfd_boolean NAME (aout, bfd_free_cached_info)
596   (bfd *);
597 
598 #define aout_32_find_inliner_info	_bfd_nosymbols_find_inliner_info
599 #if 0	/* Are these needed? */
600 #define aout_16_find_inliner_info	_bfd_nosymbols_find_inliner_info
601 #define aout_64_find_inliner_info	_bfd_nosymbols_find_inliner_info
602 #endif
603 
604 /* A.out uses the generic versions of these routines...  */
605 
606 #define	aout_16_get_section_contents	_bfd_generic_get_section_contents
607 
608 #define	aout_32_get_section_contents	_bfd_generic_get_section_contents
609 
610 #define	aout_64_get_section_contents	_bfd_generic_get_section_contents
611 #ifndef NO_WRITE_HEADER_KLUDGE
612 #define NO_WRITE_HEADER_KLUDGE 0
613 #endif
614 
615 #ifndef aout_32_bfd_is_local_label_name
616 #define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name
617 #endif
618 
619 #ifndef aout_32_bfd_is_target_special_symbol
620 #define aout_32_bfd_is_target_special_symbol \
621   ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
622 #endif
623 
624 #ifndef WRITE_HEADERS
625 #define WRITE_HEADERS(abfd, execp)					      \
626       {									      \
627 	if (adata(abfd).magic == undecided_magic)			      \
628 	  NAME (aout, adjust_sizes_and_vmas) (abfd);			      \
629     									      \
630 	execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE;	      \
631 	execp->a_entry = bfd_get_start_address (abfd);			      \
632     									      \
633 	execp->a_trsize = ((obj_textsec (abfd)->reloc_count) *		      \
634 			   obj_reloc_entry_size (abfd));		      \
635 	execp->a_drsize = ((obj_datasec (abfd)->reloc_count) *		      \
636 			   obj_reloc_entry_size (abfd));		      \
637 	NAME (aout, swap_exec_header_out) (abfd, execp, & exec_bytes);	      \
638 									      \
639 	if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0		      \
640 	    || bfd_bwrite (& exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE,     \
641 			  abfd) != EXEC_BYTES_SIZE)			      \
642 	  return FALSE;							      \
643 	/* Now write out reloc info, followed by syms and strings.  */	      \
644   									      \
645 	if (bfd_get_outsymbols (abfd) != NULL				      \
646 	    && bfd_get_symcount (abfd) != 0) 				      \
647 	  {								      \
648 	    if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (execp)), SEEK_SET) != 0)\
649 	      return FALSE;						      \
650 									      \
651 	    if (! NAME (aout, write_syms) (abfd))			      \
652 	      return FALSE;						      \
653 	  }								      \
654 									      \
655 	if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (execp)), SEEK_SET) != 0)   \
656 	  return FALSE;						      	      \
657 	if (!NAME (aout, squirt_out_relocs) (abfd, obj_textsec (abfd)))       \
658 	  return FALSE;						      	      \
659 									      \
660 	if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (execp)), SEEK_SET) != 0)   \
661 	  return FALSE;						      	      \
662 	if (!NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd)))       \
663 	  return FALSE;						      	      \
664       }
665 #endif
666 
667 /* Test if a read-only section can be merged with .text.  This is
668    possible if:
669 
670    1. Section has file contents and is read-only.
671    2. The VMA of the section is after the end of .text and before
672       the start of .data.
673    3. The image is demand-pageable (otherwise, a_text in the header
674       will not reflect the gap between .text and .data).  */
675 
676 #define aout_section_merge_with_text_p(abfd, sec)			\
677   (((sec)->flags & (SEC_HAS_CONTENTS | SEC_READONLY)) ==		\
678       (SEC_HAS_CONTENTS | SEC_READONLY)					\
679    && obj_textsec (abfd) != NULL					\
680    && obj_datasec (abfd) != NULL					\
681    && (sec)->vma >= (obj_textsec (abfd)->vma +				\
682 		     obj_textsec (abfd)->size)				\
683    && ((sec)->vma + (sec)->size) <= obj_datasec (abfd)->vma		\
684    && ((abfd)->flags & D_PAGED) != 0)
685 
686 #endif /* ! defined (LIBAOUT_H) */
687