source: trunk/binutils/bfd/libaout.h@ 3714

Last change on this file since 3714 was 907, checked in by bird, 22 years ago

Builds again - put back some uglyness :/
  • Property cvs2svn:cvs-rev set to 1.5
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 23.6 KB
Line 
1/* BFD back-end data structures for a.out (and similar) files.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23#ifndef LIBAOUT_H
24#define LIBAOUT_H
25
26/* !! NASTY HACK !! */
27#ifdef __EMX__
28#include "config.h"
29#ifdef TRAD_HEADER
30#include TRAD_HEADER
31#endif
32#endif
33
34/* We try to encapsulate the differences in the various a.out file
35 variants in a few routines, and otherwise share large masses of code.
36 This means we only have to fix bugs in one place, most of the time. */
37
38#include "bfdlink.h"
39
40/* Macros for accessing components in an aout header. Saves cluttering
41 the source with (bfd_vma) and (bfd_byte *) casts. */
42
43#define H_PUT_64(abfd, val, where) \
44 bfd_h_put_64 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
45
46#define H_PUT_32(abfd, val, where) \
47 bfd_h_put_32 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
48
49#define H_PUT_16(abfd, val, where) \
50 bfd_h_put_16 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
51
52#define H_PUT_8 bfd_h_put_8
53
54#define H_PUT_S64(abfd, val, where) \
55 bfd_h_put_signed_64 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
56
57#define H_PUT_S32(abfd, val, where) \
58 bfd_h_put_signed_32 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
59
60#define H_PUT_S16(abfd, val, where) \
61 bfd_h_put_signed_16 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
62
63#define H_PUT_S8 bfd_h_put_signed_8
64
65#define H_GET_64(abfd, where) \
66 bfd_h_get_64 ((abfd), (bfd_byte *) (where))
67
68#define H_GET_32(abfd, where) \
69 bfd_h_get_32 ((abfd), (bfd_byte *) (where))
70
71#define H_GET_16(abfd, where) \
72 bfd_h_get_16 ((abfd), (bfd_byte *) (where))
73
74#define H_GET_8 bfd_h_get_8
75
76#define H_GET_S64(abfd, where) \
77 bfd_h_get_signed_64 ((abfd), (bfd_byte *) (where))
78
79#define H_GET_S32(abfd, where) \
80 bfd_h_get_signed_32 ((abfd), (bfd_byte *) (where))
81
82#define H_GET_S16(abfd, where) \
83 bfd_h_get_signed_16 ((abfd), (bfd_byte *) (where))
84
85#define H_GET_S8 bfd_h_get_signed_8
86
87/* Parameterize the a.out code based on whether it is being built
88 for a 32-bit architecture or a 64-bit architecture. */
89/* Do not "beautify" the CONCAT* macro args. Traditional C will not
90 remove whitespace added here, and thus will fail to concatenate
91 the tokens. */
92#if ARCH_SIZE==64
93#define GET_WORD H_GET_64
94#define GET_SWORD H_GET_S64
95#define GET_MAGIC H_GET_32
96#define PUT_WORD H_PUT_64
97#define PUT_MAGIC H_PUT_32
98#ifndef NAME
99#define NAME(x,y) CONCAT3 (x,_64_,y)
100#endif
101#define JNAME(x) CONCAT2 (x,_64)
102#define BYTES_IN_WORD 8
103#else
104#if ARCH_SIZE==16
105#define GET_WORD H_GET_16
106#define GET_SWORD H_GET_S16
107#define GET_MAGIC H_GET_16
108#define PUT_WORD H_PUT_16
109#define PUT_MAGIC H_PUT_16
110#ifndef NAME
111#define NAME(x,y) CONCAT3 (x,_16_,y)
112#endif
113#define JNAME(x) CONCAT2 (x,_16)
114#define BYTES_IN_WORD 2
115#else /* ARCH_SIZE == 32 */
116#define GET_WORD H_GET_32
117#define GET_SWORD H_GET_S32
118#define GET_MAGIC H_GET_32
119#define PUT_WORD H_PUT_32
120#define PUT_MAGIC H_PUT_32
121#ifndef NAME
122#define NAME(x,y) CONCAT3 (x,_32_,y)
123#endif
124#define JNAME(x) CONCAT2 (x,_32)
125#define BYTES_IN_WORD 4
126#endif /* ARCH_SIZE==32 */
127#endif /* ARCH_SIZE==64 */
128
129/* Declare at file level, since used in parameter lists, which have
130 weird scope. */
131struct external_exec;
132struct external_nlist;
133struct reloc_ext_external;
134struct reloc_std_external;
135
136
137/* a.out backend linker hash table entries. */
138
139struct aout_link_hash_entry
140{
141 struct bfd_link_hash_entry root;
142 /* Whether this symbol has been written out. */
143 bfd_boolean written;
144 /* Symbol index in output file. */
145 int indx;
146};
147
148/* a.out backend linker hash table. */
149
150struct aout_link_hash_table
151{
152 struct bfd_link_hash_table root;
153};
154
155/* Look up an entry in an a.out link hash table. */
156
157#define aout_link_hash_lookup(table, string, create, copy, follow) \
158 ((struct aout_link_hash_entry *) \
159 bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow)))
160
161/* Traverse an a.out link hash table. */
162
163#define aout_link_hash_traverse(table, func, info) \
164 (bfd_link_hash_traverse \
165 (&(table)->root, \
166 (bfd_boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
167 (info)))
168
169/* Get the a.out link hash table from the info structure. This is
170 just a cast. */
171
172#define aout_hash_table(p) ((struct aout_link_hash_table *) ((p)->hash))
173
174
175/* Back-end information for various a.out targets. */
176struct aout_backend_data
177{
178 /* Are ZMAGIC files mapped contiguously? If so, the text section may
179 need more padding, if the segment size (granularity for memory access
180 control) is larger than the page size. */
181 unsigned char zmagic_mapped_contiguous;
182 /* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the
183 text section, which starts immediately after the file header.
184 If not, the text section starts on the next page. */
185 unsigned char text_includes_header;
186
187 /* If this flag is set, then if the entry address is not in the
188 first SEGMENT_SIZE bytes of the text section, it is taken to be
189 the address of the start of the text section. This can be useful
190 for kernels. */
191 unsigned char entry_is_text_address;
192
193 /* The value to pass to N_SET_FLAGS. */
194 unsigned char exec_hdr_flags;
195
196 /* If the text section VMA isn't specified, and we need an absolute
197 address, use this as the default. If we're producing a relocatable
198 file, zero is always used. */
199 /* ?? Perhaps a callback would be a better choice? Will this do anything
200 reasonable for a format that handles multiple CPUs with different
201 load addresses for each? */
202 bfd_vma default_text_vma;
203
204 /* Callback for setting the page and segment sizes, if they can't be
205 trivially determined from the architecture. */
206 bfd_boolean (*set_sizes)
207 PARAMS ((bfd *));
208
209 /* zmagic files only. For go32, the length of the exec header contributes
210 to the size of the text section in the file for alignment purposes but
211 does *not* get counted in the length of the text section. */
212 unsigned char exec_header_not_counted;
213
214 /* Callback from the add symbols phase of the linker code to handle
215 a dynamic object. */
216 bfd_boolean (*add_dynamic_symbols)
217 PARAMS ((bfd *, struct bfd_link_info *, struct external_nlist **,
218 bfd_size_type *, char **));
219
220 /* Callback from the add symbols phase of the linker code to handle
221 adding a single symbol to the global linker hash table. */
222 bfd_boolean (*add_one_symbol)
223 PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword,
224 asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean,
225 struct bfd_link_hash_entry **));
226
227 /* Called to handle linking a dynamic object. */
228 bfd_boolean (*link_dynamic_object)
229 PARAMS ((struct bfd_link_info *, bfd *));
230
231 /* Called for each global symbol being written out by the linker.
232 This should write out the dynamic symbol information. */
233 bfd_boolean (*write_dynamic_symbol)
234 PARAMS ((bfd *, struct bfd_link_info *, struct aout_link_hash_entry *));
235
236 /* If this callback is not NULL, the linker calls it for each reloc.
237 RELOC is a pointer to the unswapped reloc. If *SKIP is set to
238 TRUE, the reloc will be skipped. *RELOCATION may be changed to
239 change the effects of the relocation. */
240 bfd_boolean (*check_dynamic_reloc)
241 PARAMS ((struct bfd_link_info *info, bfd *input_bfd,
242 asection *input_section, struct aout_link_hash_entry *h,
243 PTR reloc, bfd_byte *contents, bfd_boolean *skip,
244 bfd_vma *relocation));
245
246 /* Called at the end of a link to finish up any dynamic linking
247 information. */
248 bfd_boolean (*finish_dynamic_link)
249 PARAMS ((bfd *, struct bfd_link_info *));
250};
251#define aout_backend_info(abfd) \
252 ((const struct aout_backend_data *)((abfd)->xvec->backend_data))
253
254/* This is the layout in memory of a "struct exec" while we process it.
255 All 'lengths' are given as a number of bytes.
256 All 'alignments' are for relinkable files only; an alignment of
257 'n' indicates the corresponding segment must begin at an
258 address that is a multiple of (2**n). */
259
260struct internal_exec
261{
262 long a_info; /* Magic number and flags, packed */
263#ifdef EMX
264 long a_hdrofs; /* Offset from file start to a.out header */
265#else
266/** remove me **/
267#ifdef __EMX__
268#error "error EMX is not defined!!!"
269#endif
270/** remove me **/
271#endif
272 bfd_vma a_text; /* length of text, in bytes */
273 bfd_vma a_data; /* length of data, in bytes */
274 bfd_vma a_bss; /* length of uninitialized data area in mem */
275 bfd_vma a_syms; /* length of symbol table data in file */
276 bfd_vma a_entry; /* start address */
277 bfd_vma a_trsize; /* length of text's relocation info, in bytes */
278 bfd_vma a_drsize; /* length of data's relocation info, in bytes */
279 /* Added for i960 */
280 bfd_vma a_tload; /* Text runtime load address */
281 bfd_vma a_dload; /* Data runtime load address */
282 unsigned char a_talign; /* Alignment of text segment */
283 unsigned char a_dalign; /* Alignment of data segment */
284 unsigned char a_balign; /* Alignment of bss segment */
285 char a_relaxable; /* Enough info for linker relax */
286};
287
288/* Magic number is written
289< MSB >
2903130292827262524232221201918171615141312111009080706050403020100
291< FLAGS >< MACHINE TYPE >< MAGIC NUMBER >
292*/
293/* Magic number for NetBSD is
294<MSB >
2953130292827262524232221201918171615141312111009080706050403020100
296< FLAGS >< MACHINE TYPE >< MAGIC NUMBER >
297*/
298
299enum machine_type {
300 M_UNKNOWN = 0,
301 M_68010 = 1,
302 M_68020 = 2,
303 M_SPARC = 3,
304 /* Skip a bunch so we don't run into any of SUN's numbers. */
305 /* Make these up for the ns32k. */
306 M_NS32032 = (64), /* ns32032 running ? */
307 M_NS32532 = (64 + 5), /* ns32532 running mach */
308
309 M_386 = 100,
310 M_29K = 101, /* AMD 29000 */
311 M_386_DYNIX = 102, /* Sequent running dynix */
312 M_ARM = 103, /* Advanced Risc Machines ARM */
313 M_SPARCLET = 131, /* SPARClet = M_SPARC + 128 */
314 M_386_NETBSD = 134, /* NetBSD/i386 binary */
315 M_68K_NETBSD = 135, /* NetBSD/m68k binary */
316 M_68K4K_NETBSD = 136, /* NetBSD/m68k4k binary */
317 M_532_NETBSD = 137, /* NetBSD/ns32k binary */
318 M_SPARC_NETBSD = 138, /* NetBSD/sparc binary */
319 M_PMAX_NETBSD = 139, /* NetBSD/pmax (MIPS little-endian) binary */
320 M_VAX_NETBSD = 140, /* NetBSD/vax binary */
321 M_ALPHA_NETBSD = 141, /* NetBSD/alpha binary */
322 M_ARM6_NETBSD = 143, /* NetBSD/arm32 binary */
323 M_SPARCLET_1 = 147, /* 0x93, reserved */
324 M_VAX4K_NETBSD = 150, /* NetBSD/vax 4K pages binary */
325 M_MIPS1 = 151, /* MIPS R2000/R3000 binary */
326 M_MIPS2 = 152, /* MIPS R4000/R6000 binary */
327 M_SPARCLET_2 = 163, /* 0xa3, reserved */
328 M_SPARCLET_3 = 179, /* 0xb3, reserved */
329 M_SPARCLET_4 = 195, /* 0xc3, reserved */
330 M_HP200 = 200, /* HP 200 (68010) BSD binary */
331 M_HP300 = (300 % 256), /* HP 300 (68020+68881) BSD binary */
332 M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary */
333 M_SPARCLET_5 = 211, /* 0xd3, reserved */
334 M_SPARCLET_6 = 227, /* 0xe3, reserved */
335 /* M_SPARCLET_7 = 243 / * 0xf3, reserved */
336 M_SPARCLITE_LE = 243,
337 M_CRIS = 255 /* Axis CRIS binary. */
338};
339
340#define N_DYNAMIC(exec) ((exec).a_info & 0x80000000)
341
342#ifndef N_MAGIC
343# define N_MAGIC(exec) ((exec).a_info & 0xffff)
344#endif
345
346#ifndef N_MACHTYPE
347# define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
348#endif
349
350#ifndef N_FLAGS
351# define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
352#endif
353
354#ifndef N_SET_INFO
355# define N_SET_INFO(exec, magic, type, flags) \
356((exec).a_info = ((magic) & 0xffff) \
357 | (((int)(type) & 0xff) << 16) \
358 | (((flags) & 0xff) << 24))
359#endif
360
361#ifndef N_SET_DYNAMIC
362# define N_SET_DYNAMIC(exec, dynamic) \
363((exec).a_info = (dynamic) ? (long) ((exec).a_info | 0x80000000) : \
364((exec).a_info & 0x7fffffff))
365#endif
366
367#ifndef N_SET_MAGIC
368# define N_SET_MAGIC(exec, magic) \
369((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
370#endif
371
372#ifndef N_SET_MACHTYPE
373# define N_SET_MACHTYPE(exec, machtype) \
374((exec).a_info = \
375 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
376#endif
377
378#ifndef N_SET_FLAGS
379# define N_SET_FLAGS(exec, flags) \
380((exec).a_info = \
381 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
382#endif
383
384typedef struct aout_symbol {
385 asymbol symbol;
386 short desc;
387 char other;
388 unsigned char type;
389} aout_symbol_type;
390
391/* The `tdata' struct for all a.out-like object file formats.
392 Various things depend on this struct being around any time an a.out
393 file is being handled. An example is dbxread.c in GDB. */
394
395struct aoutdata {
396 struct internal_exec *hdr; /* exec file header */
397 aout_symbol_type *symbols; /* symtab for input bfd */
398
399 /* For ease, we do this. */
400 asection *textsec;
401 asection *datasec;
402 asection *bsssec;
403
404 /* We remember these offsets so that after check_file_format, we have
405 no dependencies on the particular format of the exec_hdr. */
406 file_ptr sym_filepos;
407 file_ptr str_filepos;
408
409 /* Size of a relocation entry in external form. */
410 unsigned reloc_entry_size;
411
412 /* Size of a symbol table entry in external form. */
413 unsigned symbol_entry_size;
414
415 /* Page size - needed for alignment of demand paged files. */
416 unsigned long page_size;
417
418 /* Segment size - needed for alignment of demand paged files. */
419 unsigned long segment_size;
420
421 /* Zmagic disk block size - need to align the start of the text
422 section in ZMAGIC binaries. Normally the same as page_size. */
423 unsigned long zmagic_disk_block_size;
424
425 unsigned exec_bytes_size;
426 unsigned vma_adjusted : 1;
427
428 /* Used when a bfd supports several highly similar formats. */
429 enum
430 {
431 default_format = 0,
432 /* Used on HP 9000/300 running HP/UX. See hp300hpux.c. */
433 gnu_encap_format,
434 /* Used on Linux, 386BSD, etc. See include/aout/aout64.h. */
435 q_magic_format
436 } subformat;
437
438 enum
439 {
440 undecided_magic = 0,
441 z_magic,
442 o_magic,
443 n_magic
444 } magic;
445
446 /* A buffer for find_nearest_line. */
447 char *line_buf;
448
449 /* The external symbol information. */
450 struct external_nlist *external_syms;
451 bfd_size_type external_sym_count;
452 bfd_window sym_window;
453 char *external_strings;
454 bfd_size_type external_string_size;
455 bfd_window string_window;
456 struct aout_link_hash_entry **sym_hashes;
457
458 /* A pointer for shared library information. */
459 PTR dynamic_info;
460
461 /* A mapping from local symbols to offsets into the global offset
462 table, used when linking on SunOS. This is indexed by the symbol
463 index. */
464 bfd_vma *local_got_offsets;
465};
466
467struct aout_data_struct {
468 struct aoutdata a;
469 struct internal_exec e;
470};
471
472#define adata(bfd) ((bfd)->tdata.aout_data->a)
473#define exec_hdr(bfd) (adata(bfd).hdr)
474#define obj_aout_symbols(bfd) (adata(bfd).symbols)
475#define obj_textsec(bfd) (adata(bfd).textsec)
476#define obj_datasec(bfd) (adata(bfd).datasec)
477#define obj_bsssec(bfd) (adata(bfd).bsssec)
478#define obj_sym_filepos(bfd) (adata(bfd).sym_filepos)
479#define obj_str_filepos(bfd) (adata(bfd).str_filepos)
480#define obj_reloc_entry_size(bfd) (adata(bfd).reloc_entry_size)
481#define obj_symbol_entry_size(bfd) (adata(bfd).symbol_entry_size)
482#define obj_aout_subformat(bfd) (adata(bfd).subformat)
483#define obj_aout_external_syms(bfd) (adata(bfd).external_syms)
484#define obj_aout_external_sym_count(bfd) (adata(bfd).external_sym_count)
485#define obj_aout_sym_window(bfd) (adata(bfd).sym_window)
486#define obj_aout_external_strings(bfd) (adata(bfd).external_strings)
487#define obj_aout_external_string_size(bfd) (adata(bfd).external_string_size)
488#define obj_aout_string_window(bfd) (adata(bfd).string_window)
489#define obj_aout_sym_hashes(bfd) (adata(bfd).sym_hashes)
490#define obj_aout_dynamic_info(bfd) (adata(bfd).dynamic_info)
491
492/* We take the address of the first element of an asymbol to ensure that the
493 macro is only ever applied to an asymbol. */
494#define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))
495
496/* Information we keep for each a.out section. This is currently only
497 used by the a.out backend linker. */
498
499struct aout_section_data_struct
500{
501 /* The unswapped relocation entries for this section. */
502 PTR relocs;
503};
504
505#define aout_section_data(s) \
506 ((struct aout_section_data_struct *) (s)->used_by_bfd)
507
508#define set_aout_section_data(s,v) \
509 ((s)->used_by_bfd = (PTR)&(v)->relocs)
510
511/* Prototype declarations for functions defined in aoutx.h. */
512
513extern bfd_boolean NAME(aout,squirt_out_relocs)
514 PARAMS ((bfd *, asection *));
515
516extern bfd_boolean NAME(aout,make_sections)
517 PARAMS ((bfd *));
518
519extern const bfd_target * NAME(aout,some_aout_object_p)
520 PARAMS ((bfd *, struct internal_exec *, const bfd_target *(*) (bfd *)));
521
522extern bfd_boolean NAME(aout,mkobject)
523 PARAMS ((bfd *));
524
525extern enum machine_type NAME(aout,machine_type)
526 PARAMS ((enum bfd_architecture, unsigned long, bfd_boolean *));
527
528extern bfd_boolean NAME(aout,set_arch_mach)
529 PARAMS ((bfd *, enum bfd_architecture, unsigned long));
530
531extern bfd_boolean NAME(aout,new_section_hook)
532 PARAMS ((bfd *, asection *));
533
534extern bfd_boolean NAME(aout,set_section_contents)
535 PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
536
537extern asymbol * NAME(aout,make_empty_symbol)
538 PARAMS ((bfd *));
539
540extern bfd_boolean NAME(aout,translate_symbol_table)
541 PARAMS ((bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type,
542 char *, bfd_size_type, bfd_boolean));
543
544extern bfd_boolean NAME(aout,slurp_symbol_table)
545 PARAMS ((bfd *));
546
547extern bfd_boolean NAME(aout,write_syms)
548 PARAMS ((bfd *));
549
550extern void NAME(aout,reclaim_symbol_table)
551 PARAMS ((bfd *));
552
553extern long NAME(aout,get_symtab_upper_bound)
554 PARAMS ((bfd *));
555
556extern long NAME(aout,get_symtab)
557 PARAMS ((bfd *, asymbol **));
558
559extern void NAME(aout,swap_ext_reloc_in)
560 PARAMS ((bfd *, struct reloc_ext_external *, arelent *, asymbol **,
561 bfd_size_type));
562extern void NAME(aout,swap_std_reloc_in)
563 PARAMS ((bfd *, struct reloc_std_external *, arelent *, asymbol **,
564 bfd_size_type));
565
566extern reloc_howto_type * NAME(aout,reloc_type_lookup)
567 PARAMS ((bfd *, bfd_reloc_code_real_type));
568
569extern bfd_boolean NAME(aout,slurp_reloc_table)
570 PARAMS ((bfd *, sec_ptr, asymbol **));
571
572extern long NAME(aout,canonicalize_reloc)
573 PARAMS ((bfd *, sec_ptr, arelent **, asymbol **));
574
575extern long NAME(aout,get_reloc_upper_bound)
576 PARAMS ((bfd *, sec_ptr));
577
578extern void NAME(aout,reclaim_reloc)
579 PARAMS ((bfd *, sec_ptr));
580
581extern alent * NAME(aout,get_lineno)
582 PARAMS ((bfd *, asymbol *));
583
584extern void NAME(aout,print_symbol)
585 PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
586
587extern void NAME(aout,get_symbol_info)
588 PARAMS ((bfd *, asymbol *, symbol_info *));
589
590extern bfd_boolean NAME(aout,find_nearest_line)
591 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
592 const char **, unsigned int *));
593
594extern long NAME(aout,read_minisymbols)
595 PARAMS ((bfd *, bfd_boolean, PTR *, unsigned int *));
596
597extern asymbol * NAME(aout,minisymbol_to_symbol)
598 PARAMS ((bfd *, bfd_boolean, const PTR, asymbol *));
599
600extern int NAME(aout,sizeof_headers)
601 PARAMS ((bfd *, bfd_boolean));
602
603extern bfd_boolean NAME(aout,adjust_sizes_and_vmas)
604 PARAMS ((bfd *, bfd_size_type *, file_ptr *));
605
606extern void NAME(aout,swap_exec_header_in)
607 PARAMS ((bfd *, struct external_exec *, struct internal_exec *));
608
609extern void NAME(aout,swap_exec_header_out)
610 PARAMS ((bfd *, struct internal_exec *, struct external_exec *));
611
612extern struct bfd_hash_entry * NAME(aout,link_hash_newfunc)
613 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
614
615extern bfd_boolean NAME(aout,link_hash_table_init)
616 PARAMS ((struct aout_link_hash_table *, bfd *,
617 struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
618 struct bfd_hash_table *,
619 const char *)));
620
621extern struct bfd_link_hash_table * NAME(aout,link_hash_table_create)
622 PARAMS ((bfd *));
623
624extern bfd_boolean NAME(aout,link_add_symbols)
625 PARAMS ((bfd *, struct bfd_link_info *));
626
627extern bfd_boolean NAME(aout,final_link)
628 PARAMS ((bfd *, struct bfd_link_info *,
629 void (*) (bfd *, file_ptr *, file_ptr *, file_ptr *)));
630
631extern bfd_boolean NAME(aout,bfd_free_cached_info)
632 PARAMS ((bfd *));
633
634/* A.out uses the generic versions of these routines... */
635
636#define aout_16_get_section_contents _bfd_generic_get_section_contents
637
638#define aout_32_get_section_contents _bfd_generic_get_section_contents
639
640#define aout_64_get_section_contents _bfd_generic_get_section_contents
641#ifndef NO_WRITE_HEADER_KLUDGE
642#define NO_WRITE_HEADER_KLUDGE 0
643#endif
644
645#ifndef aout_32_bfd_is_local_label_name
646#define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name
647#endif
648
649#ifndef WRITE_HEADERS
650#define WRITE_HEADERS(abfd, execp) \
651 { \
652 bfd_size_type text_size; /* dummy vars */ \
653 file_ptr text_end; \
654 if (adata(abfd).magic == undecided_magic) \
655 NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end); \
656 \
657 execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \
658 execp->a_entry = bfd_get_start_address (abfd); \
659 \
660 execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \
661 obj_reloc_entry_size (abfd)); \
662 execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \
663 obj_reloc_entry_size (abfd)); \
664 NAME(aout,swap_exec_header_out) (abfd, execp, &exec_bytes); \
665 \
666 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 \
667 || bfd_bwrite ((PTR) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, \
668 abfd) != EXEC_BYTES_SIZE) \
669 return FALSE; \
670 /* Now write out reloc info, followed by syms and strings. */ \
671 \
672 if (bfd_get_outsymbols (abfd) != (asymbol **) NULL \
673 && bfd_get_symcount (abfd) != 0) \
674 { \
675 if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*execp)), SEEK_SET) != 0)\
676 return FALSE; \
677 \
678 if (! NAME(aout,write_syms) (abfd)) \
679 return FALSE; \
680 } \
681 \
682 if (bfd_seek (abfd, (file_ptr) (N_TRELOFF(*execp)), SEEK_SET) != 0) \
683 return FALSE; \
684 if (!NAME(aout,squirt_out_relocs) (abfd, obj_textsec (abfd))) \
685 return FALSE; \
686 \
687 if (bfd_seek (abfd, (file_ptr) (N_DRELOFF(*execp)), SEEK_SET) != 0) \
688 return FALSE; \
689 if (!NAME(aout,squirt_out_relocs) (abfd, obj_datasec (abfd))) \
690 return FALSE; \
691 }
692#endif
693
694/* Test if a read-only section can be merged with .text. This is
695 possible if:
696
697 1. Section has file contents and is read-only.
698 2. The VMA of the section is after the end of .text and before
699 the start of .data.
700 3. The image is demand-pageable (otherwise, a_text in the header
701 will not reflect the gap between .text and .data). */
702
703#define aout_section_merge_with_text_p(abfd, sec) \
704 (((sec)->flags & (SEC_HAS_CONTENTS | SEC_READONLY)) == \
705 (SEC_HAS_CONTENTS | SEC_READONLY) \
706 && obj_textsec (abfd) != NULL \
707 && obj_datasec (abfd) != NULL \
708 && (sec)->vma >= (obj_textsec (abfd)->vma + \
709 obj_textsec (abfd)->_cooked_size) \
710 && ((sec)->vma + (sec)->_cooked_size) <= obj_datasec (abfd)->vma \
711 && ((abfd)->flags & D_PAGED) != 0)
712
713#endif /* ! defined (LIBAOUT_H) */
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