2001-03-26 H.J. Lu <hjl@gnu.org>
[binutils.git] / bfd / aoutx.h
blobf1aae0e86845cc2814695009860ff1b86599bde5
1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
3 2001
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
24 SECTION
25 a.out backends
27 DESCRIPTION
29 BFD supports a number of different flavours of a.out format,
30 though the major differences are only the sizes of the
31 structures on disk, and the shape of the relocation
32 information.
34 The support is split into a basic support file @file{aoutx.h}
35 and other files which derive functions from the base. One
36 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
37 adds to the basic a.out functions support for sun3, sun4, 386
38 and 29k a.out files, to create a target jump vector for a
39 specific target.
41 This information is further split out into more specific files
42 for each machine, including @file{sunos.c} for sun3 and sun4,
43 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
44 demonstration of a 64 bit a.out format.
46 The base file @file{aoutx.h} defines general mechanisms for
47 reading and writing records to and from disk and various
48 other methods which BFD requires. It is included by
49 @file{aout32.c} and @file{aout64.c} to form the names
50 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
52 As an example, this is what goes on to make the back end for a
53 sun4, from @file{aout32.c}:
55 | #define ARCH_SIZE 32
56 | #include "aoutx.h"
58 Which exports names:
60 | ...
61 | aout_32_canonicalize_reloc
62 | aout_32_find_nearest_line
63 | aout_32_get_lineno
64 | aout_32_get_reloc_upper_bound
65 | ...
67 from @file{sunos.c}:
69 | #define TARGET_NAME "a.out-sunos-big"
70 | #define VECNAME sunos_big_vec
71 | #include "aoutf1.h"
73 requires all the names from @file{aout32.c}, and produces the jump vector
75 | sunos_big_vec
77 The file @file{host-aout.c} is a special case. It is for a large set
78 of hosts that use ``more or less standard'' a.out files, and
79 for which cross-debugging is not interesting. It uses the
80 standard 32-bit a.out support routines, but determines the
81 file offsets and addresses of the text, data, and BSS
82 sections, the machine architecture and machine type, and the
83 entry point address, in a host-dependent manner. Once these
84 values have been determined, generic code is used to handle
85 the object file.
87 When porting it to run on a new system, you must supply:
89 | HOST_PAGE_SIZE
90 | HOST_SEGMENT_SIZE
91 | HOST_MACHINE_ARCH (optional)
92 | HOST_MACHINE_MACHINE (optional)
93 | HOST_TEXT_START_ADDR
94 | HOST_STACK_END_ADDR
96 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
97 values, plus the structures and macros defined in @file{a.out.h} on
98 your host system, will produce a BFD target that will access
99 ordinary a.out files on your host. To configure a new machine
100 to use @file{host-aout.c}, specify:
102 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
103 | TDEPFILES= host-aout.o trad-core.o
105 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
106 to use the
107 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
108 configuration is selected.
112 /* Some assumptions:
113 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
114 Doesn't matter what the setting of WP_TEXT is on output, but it'll
115 get set on input.
116 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
117 * Any BFD with both flags clear is OMAGIC.
118 (Just want to make these explicit, so the conditions tested in this
119 file make sense if you're more familiar with a.out than with BFD.) */
121 #define KEEPIT udata.i
123 #include <ctype.h>
124 #include "bfd.h"
125 #include "sysdep.h"
126 #include "bfdlink.h"
128 #include "libaout.h"
129 #include "libbfd.h"
130 #include "aout/aout64.h"
131 #include "aout/stab_gnu.h"
132 #include "aout/ar.h"
134 static boolean aout_get_external_symbols PARAMS ((bfd *));
135 static boolean translate_from_native_sym_flags
136 PARAMS ((bfd *, aout_symbol_type *));
137 static boolean translate_to_native_sym_flags
138 PARAMS ((bfd *, asymbol *, struct external_nlist *));
139 static void adjust_o_magic PARAMS ((bfd *, struct internal_exec *));
140 static void adjust_z_magic PARAMS ((bfd *, struct internal_exec *));
141 static void adjust_n_magic PARAMS ((bfd *, struct internal_exec *));
144 SUBSECTION
145 Relocations
147 DESCRIPTION
148 The file @file{aoutx.h} provides for both the @emph{standard}
149 and @emph{extended} forms of a.out relocation records.
151 The standard records contain only an
152 address, a symbol index, and a type field. The extended records
153 (used on 29ks and sparcs) also have a full integer for an
154 addend.
157 #ifndef CTOR_TABLE_RELOC_HOWTO
158 #define CTOR_TABLE_RELOC_IDX 2
159 #define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \
160 ? howto_table_ext : howto_table_std) \
161 + CTOR_TABLE_RELOC_IDX)
162 #endif
164 #ifndef MY_swap_std_reloc_in
165 #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
166 #endif
168 #ifndef MY_swap_ext_reloc_in
169 #define MY_swap_ext_reloc_in NAME(aout,swap_ext_reloc_in)
170 #endif
172 #ifndef MY_swap_std_reloc_out
173 #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
174 #endif
176 #ifndef MY_swap_ext_reloc_out
177 #define MY_swap_ext_reloc_out NAME(aout,swap_ext_reloc_out)
178 #endif
180 #ifndef MY_final_link_relocate
181 #define MY_final_link_relocate _bfd_final_link_relocate
182 #endif
184 #ifndef MY_relocate_contents
185 #define MY_relocate_contents _bfd_relocate_contents
186 #endif
188 #define howto_table_ext NAME(aout,ext_howto_table)
189 #define howto_table_std NAME(aout,std_howto_table)
191 reloc_howto_type howto_table_ext[] =
193 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
194 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false),
195 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false),
196 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false),
197 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false),
198 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false),
199 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false),
200 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false),
201 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false),
202 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false),
203 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false),
204 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false),
205 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false),
206 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false),
207 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false),
208 HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false),
209 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_signed,0,"BASE13", false, 0,0x00001fff, false),
210 HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false),
211 HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true),
212 HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true),
213 HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false),
214 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false),
215 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false),
216 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false),
217 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
218 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true),
219 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true),
220 #define RELOC_SPARC_REV32 RELOC_WDISP19
221 HOWTO(RELOC_SPARC_REV32, 0, 2, 32, false, 0, complain_overflow_dont,0,"R_SPARC_REV32", false, 0,0xffffffff, false),
224 /* Convert standard reloc records to "arelent" format (incl byte swap). */
226 reloc_howto_type howto_table_std[] = {
227 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
228 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false),
229 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false),
230 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false),
231 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false),
232 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
233 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
234 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
235 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
236 HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false),
237 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false),
238 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false),
239 EMPTY_HOWTO (-1),
240 EMPTY_HOWTO (-1),
241 EMPTY_HOWTO (-1),
242 EMPTY_HOWTO (-1),
243 EMPTY_HOWTO (-1),
244 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false),
245 EMPTY_HOWTO (-1),
246 EMPTY_HOWTO (-1),
247 EMPTY_HOWTO (-1),
248 EMPTY_HOWTO (-1),
249 EMPTY_HOWTO (-1),
250 EMPTY_HOWTO (-1),
251 EMPTY_HOWTO (-1),
252 EMPTY_HOWTO (-1),
253 EMPTY_HOWTO (-1),
254 EMPTY_HOWTO (-1),
255 EMPTY_HOWTO (-1),
256 EMPTY_HOWTO (-1),
257 EMPTY_HOWTO (-1),
258 EMPTY_HOWTO (-1),
259 EMPTY_HOWTO (-1),
260 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
261 EMPTY_HOWTO (-1),
262 EMPTY_HOWTO (-1),
263 EMPTY_HOWTO (-1),
264 EMPTY_HOWTO (-1),
265 EMPTY_HOWTO (-1),
266 EMPTY_HOWTO (-1),
267 EMPTY_HOWTO (-1),
268 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false),
271 #define TABLE_SIZE(TABLE) (sizeof (TABLE)/sizeof (TABLE[0]))
273 reloc_howto_type *
274 NAME(aout,reloc_type_lookup) (abfd,code)
275 bfd *abfd;
276 bfd_reloc_code_real_type code;
278 #define EXT(i,j) case i: return &howto_table_ext[j]
279 #define STD(i,j) case i: return &howto_table_std[j]
280 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
281 if (code == BFD_RELOC_CTOR)
282 switch (bfd_get_arch_info (abfd)->bits_per_address)
284 case 32:
285 code = BFD_RELOC_32;
286 break;
287 case 64:
288 code = BFD_RELOC_64;
289 break;
291 if (ext)
292 switch (code)
294 EXT (BFD_RELOC_8, 0);
295 EXT (BFD_RELOC_16, 1);
296 EXT (BFD_RELOC_32, 2);
297 EXT (BFD_RELOC_HI22, 8);
298 EXT (BFD_RELOC_LO10, 11);
299 EXT (BFD_RELOC_32_PCREL_S2, 6);
300 EXT (BFD_RELOC_SPARC_WDISP22, 7);
301 EXT (BFD_RELOC_SPARC13, 10);
302 EXT (BFD_RELOC_SPARC_GOT10, 14);
303 EXT (BFD_RELOC_SPARC_BASE13, 15);
304 EXT (BFD_RELOC_SPARC_GOT13, 15);
305 EXT (BFD_RELOC_SPARC_GOT22, 16);
306 EXT (BFD_RELOC_SPARC_PC10, 17);
307 EXT (BFD_RELOC_SPARC_PC22, 18);
308 EXT (BFD_RELOC_SPARC_WPLT30, 19);
309 EXT (BFD_RELOC_SPARC_REV32, 26);
310 default: return (reloc_howto_type *) NULL;
312 else
313 /* std relocs */
314 switch (code)
316 STD (BFD_RELOC_16, 1);
317 STD (BFD_RELOC_32, 2);
318 STD (BFD_RELOC_8_PCREL, 4);
319 STD (BFD_RELOC_16_PCREL, 5);
320 STD (BFD_RELOC_32_PCREL, 6);
321 STD (BFD_RELOC_16_BASEREL, 9);
322 STD (BFD_RELOC_32_BASEREL, 10);
323 default: return (reloc_howto_type *) NULL;
328 SUBSECTION
329 Internal entry points
331 DESCRIPTION
332 @file{aoutx.h} exports several routines for accessing the
333 contents of an a.out file, which are gathered and exported in
334 turn by various format specific files (eg sunos.c).
339 FUNCTION
340 aout_@var{size}_swap_exec_header_in
342 SYNOPSIS
343 void aout_@var{size}_swap_exec_header_in,
344 (bfd *abfd,
345 struct external_exec *raw_bytes,
346 struct internal_exec *execp);
348 DESCRIPTION
349 Swap the information in an executable header @var{raw_bytes} taken
350 from a raw byte stream memory image into the internal exec header
351 structure @var{execp}.
354 #ifndef NAME_swap_exec_header_in
355 void
356 NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
357 bfd *abfd;
358 struct external_exec *raw_bytes;
359 struct internal_exec *execp;
361 struct external_exec *bytes = (struct external_exec *)raw_bytes;
363 /* The internal_exec structure has some fields that are unused in this
364 configuration (IE for i960), so ensure that all such uninitialized
365 fields are zero'd out. There are places where two of these structs
366 are memcmp'd, and thus the contents do matter. */
367 memset ((PTR) execp, 0, sizeof (struct internal_exec));
368 /* Now fill in fields in the execp, from the bytes in the raw data. */
369 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
370 execp->a_text = GET_WORD (abfd, bytes->e_text);
371 execp->a_data = GET_WORD (abfd, bytes->e_data);
372 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
373 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
374 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
375 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
376 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
378 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
379 #endif
382 FUNCTION
383 aout_@var{size}_swap_exec_header_out
385 SYNOPSIS
386 void aout_@var{size}_swap_exec_header_out
387 (bfd *abfd,
388 struct internal_exec *execp,
389 struct external_exec *raw_bytes);
391 DESCRIPTION
392 Swap the information in an internal exec header structure
393 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
395 void
396 NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
397 bfd *abfd;
398 struct internal_exec *execp;
399 struct external_exec *raw_bytes;
401 struct external_exec *bytes = (struct external_exec *)raw_bytes;
403 /* Now fill in fields in the raw data, from the fields in the exec struct. */
404 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
405 PUT_WORD (abfd, execp->a_text , bytes->e_text);
406 PUT_WORD (abfd, execp->a_data , bytes->e_data);
407 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
408 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
409 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
410 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
411 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
414 /* Make all the section for an a.out file. */
416 boolean
417 NAME(aout,make_sections) (abfd)
418 bfd *abfd;
420 if (obj_textsec (abfd) == (asection *) NULL
421 && bfd_make_section (abfd, ".text") == (asection *) NULL)
422 return false;
423 if (obj_datasec (abfd) == (asection *) NULL
424 && bfd_make_section (abfd, ".data") == (asection *) NULL)
425 return false;
426 if (obj_bsssec (abfd) == (asection *) NULL
427 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
428 return false;
429 return true;
433 FUNCTION
434 aout_@var{size}_some_aout_object_p
436 SYNOPSIS
437 const bfd_target *aout_@var{size}_some_aout_object_p
438 (bfd *abfd,
439 const bfd_target *(*callback_to_real_object_p) ());
441 DESCRIPTION
442 Some a.out variant thinks that the file open in @var{abfd}
443 checking is an a.out file. Do some more checking, and set up
444 for access if it really is. Call back to the calling
445 environment's "finish up" function just before returning, to
446 handle any last-minute setup.
449 const bfd_target *
450 NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
451 bfd *abfd;
452 struct internal_exec *execp;
453 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
455 struct aout_data_struct *rawptr, *oldrawptr;
456 const bfd_target *result;
458 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
459 if (rawptr == NULL)
460 return 0;
462 oldrawptr = abfd->tdata.aout_data;
463 abfd->tdata.aout_data = rawptr;
465 /* Copy the contents of the old tdata struct.
466 In particular, we want the subformat, since for hpux it was set in
467 hp300hpux.c:swap_exec_header_in and will be used in
468 hp300hpux.c:callback. */
469 if (oldrawptr != NULL)
470 *abfd->tdata.aout_data = *oldrawptr;
472 abfd->tdata.aout_data->a.hdr = &rawptr->e;
473 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */
474 execp = abfd->tdata.aout_data->a.hdr;
476 /* Set the file flags */
477 abfd->flags = BFD_NO_FLAGS;
478 if (execp->a_drsize || execp->a_trsize)
479 abfd->flags |= HAS_RELOC;
480 /* Setting of EXEC_P has been deferred to the bottom of this function */
481 if (execp->a_syms)
482 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
483 if (N_DYNAMIC(*execp))
484 abfd->flags |= DYNAMIC;
486 if (N_MAGIC (*execp) == ZMAGIC)
488 abfd->flags |= D_PAGED | WP_TEXT;
489 adata (abfd).magic = z_magic;
491 else if (N_MAGIC (*execp) == QMAGIC)
493 abfd->flags |= D_PAGED | WP_TEXT;
494 adata (abfd).magic = z_magic;
495 adata (abfd).subformat = q_magic_format;
497 else if (N_MAGIC (*execp) == NMAGIC)
499 abfd->flags |= WP_TEXT;
500 adata (abfd).magic = n_magic;
502 else if (N_MAGIC (*execp) == OMAGIC
503 || N_MAGIC (*execp) == BMAGIC)
504 adata (abfd).magic = o_magic;
505 else
507 /* Should have been checked with N_BADMAG before this routine
508 was called. */
509 abort ();
512 bfd_get_start_address (abfd) = execp->a_entry;
514 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
515 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
517 /* The default relocation entry size is that of traditional V7 Unix. */
518 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
520 /* The default symbol entry size is that of traditional Unix. */
521 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
523 #ifdef USE_MMAP
524 bfd_init_window (&obj_aout_sym_window (abfd));
525 bfd_init_window (&obj_aout_string_window (abfd));
526 #endif
527 obj_aout_external_syms (abfd) = NULL;
528 obj_aout_external_strings (abfd) = NULL;
529 obj_aout_sym_hashes (abfd) = NULL;
531 if (! NAME(aout,make_sections) (abfd))
532 return NULL;
534 obj_datasec (abfd)->_raw_size = execp->a_data;
535 obj_bsssec (abfd)->_raw_size = execp->a_bss;
537 obj_textsec (abfd)->flags =
538 (execp->a_trsize != 0
539 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
540 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
541 obj_datasec (abfd)->flags =
542 (execp->a_drsize != 0
543 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
544 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
545 obj_bsssec (abfd)->flags = SEC_ALLOC;
547 #ifdef THIS_IS_ONLY_DOCUMENTATION
548 /* The common code can't fill in these things because they depend
549 on either the start address of the text segment, the rounding
550 up of virtual addresses between segments, or the starting file
551 position of the text segment -- all of which varies among different
552 versions of a.out. */
554 /* Call back to the format-dependent code to fill in the rest of the
555 fields and do any further cleanup. Things that should be filled
556 in by the callback: */
558 struct exec *execp = exec_hdr (abfd);
560 obj_textsec (abfd)->size = N_TXTSIZE(*execp);
561 obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp);
562 /* data and bss are already filled in since they're so standard */
564 /* The virtual memory addresses of the sections */
565 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
566 obj_datasec (abfd)->vma = N_DATADDR(*execp);
567 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
569 /* The file offsets of the sections */
570 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
571 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
573 /* The file offsets of the relocation info */
574 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
575 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
577 /* The file offsets of the string table and symbol table. */
578 obj_str_filepos (abfd) = N_STROFF (*execp);
579 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
581 /* Determine the architecture and machine type of the object file. */
582 switch (N_MACHTYPE (*exec_hdr (abfd))) {
583 default:
584 abfd->obj_arch = bfd_arch_obscure;
585 break;
588 adata(abfd)->page_size = TARGET_PAGE_SIZE;
589 adata(abfd)->segment_size = SEGMENT_SIZE;
590 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
592 return abfd->xvec;
594 /* The architecture is encoded in various ways in various a.out variants,
595 or is not encoded at all in some of them. The relocation size depends
596 on the architecture and the a.out variant. Finally, the return value
597 is the bfd_target vector in use. If an error occurs, return zero and
598 set bfd_error to the appropriate error code.
600 Formats such as b.out, which have additional fields in the a.out
601 header, should cope with them in this callback as well. */
602 #endif /* DOCUMENTATION */
604 result = (*callback_to_real_object_p) (abfd);
606 /* Now that the segment addresses have been worked out, take a better
607 guess at whether the file is executable. If the entry point
608 is within the text segment, assume it is. (This makes files
609 executable even if their entry point address is 0, as long as
610 their text starts at zero.).
612 This test had to be changed to deal with systems where the text segment
613 runs at a different location than the default. The problem is that the
614 entry address can appear to be outside the text segment, thus causing an
615 erroneous conclusion that the file isn't executable.
617 To fix this, we now accept any non-zero entry point as an indication of
618 executability. This will work most of the time, since only the linker
619 sets the entry point, and that is likely to be non-zero for most systems. */
621 if (execp->a_entry != 0
622 || (execp->a_entry >= obj_textsec(abfd)->vma
623 && execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
624 abfd->flags |= EXEC_P;
625 #ifdef STAT_FOR_EXEC
626 else
628 struct stat stat_buf;
630 /* The original heuristic doesn't work in some important cases.
631 The a.out file has no information about the text start
632 address. For files (like kernels) linked to non-standard
633 addresses (ld -Ttext nnn) the entry point may not be between
634 the default text start (obj_textsec(abfd)->vma) and
635 (obj_textsec(abfd)->vma) + text size. This is not just a mach
636 issue. Many kernels are loaded at non standard addresses. */
637 if (abfd->iostream != NULL
638 && (abfd->flags & BFD_IN_MEMORY) == 0
639 && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0)
640 && ((stat_buf.st_mode & 0111) != 0))
641 abfd->flags |= EXEC_P;
643 #endif /* STAT_FOR_EXEC */
645 if (result)
647 #if 0 /* These should be set correctly anyways. */
648 abfd->sections = obj_textsec (abfd);
649 obj_textsec (abfd)->next = obj_datasec (abfd);
650 obj_datasec (abfd)->next = obj_bsssec (abfd);
651 #endif
653 else
655 free (rawptr);
656 abfd->tdata.aout_data = oldrawptr;
658 return result;
662 FUNCTION
663 aout_@var{size}_mkobject
665 SYNOPSIS
666 boolean aout_@var{size}_mkobject, (bfd *abfd);
668 DESCRIPTION
669 Initialize BFD @var{abfd} for use with a.out files.
672 boolean
673 NAME(aout,mkobject) (abfd)
674 bfd *abfd;
676 struct aout_data_struct *rawptr;
678 bfd_set_error (bfd_error_system_call);
680 /* Use an intermediate variable for clarity */
681 rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
683 if (rawptr == NULL)
684 return false;
686 abfd->tdata.aout_data = rawptr;
687 exec_hdr (abfd) = &(rawptr->e);
689 obj_textsec (abfd) = (asection *)NULL;
690 obj_datasec (abfd) = (asection *)NULL;
691 obj_bsssec (abfd) = (asection *)NULL;
693 return true;
697 FUNCTION
698 aout_@var{size}_machine_type
700 SYNOPSIS
701 enum machine_type aout_@var{size}_machine_type
702 (enum bfd_architecture arch,
703 unsigned long machine));
705 DESCRIPTION
706 Keep track of machine architecture and machine type for
707 a.out's. Return the <<machine_type>> for a particular
708 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
709 and machine can't be represented in a.out format.
711 If the architecture is understood, machine type 0 (default)
712 is always understood.
715 enum machine_type
716 NAME(aout,machine_type) (arch, machine, unknown)
717 enum bfd_architecture arch;
718 unsigned long machine;
719 boolean *unknown;
721 enum machine_type arch_flags;
723 arch_flags = M_UNKNOWN;
724 *unknown = true;
726 switch (arch) {
727 case bfd_arch_sparc:
728 if (machine == 0
729 || machine == bfd_mach_sparc
730 || machine == bfd_mach_sparc_sparclite
731 || machine == bfd_mach_sparc_sparclite_le
732 || machine == bfd_mach_sparc_v9)
733 arch_flags = M_SPARC;
734 else if (machine == bfd_mach_sparc_sparclet)
735 arch_flags = M_SPARCLET;
736 break;
738 case bfd_arch_m68k:
739 switch (machine) {
740 case 0: arch_flags = M_68010; break;
741 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = false; break;
742 case bfd_mach_m68010: arch_flags = M_68010; break;
743 case bfd_mach_m68020: arch_flags = M_68020; break;
744 default: arch_flags = M_UNKNOWN; break;
746 break;
748 case bfd_arch_i386:
749 if (machine == 0) arch_flags = M_386;
750 break;
752 case bfd_arch_a29k:
753 if (machine == 0) arch_flags = M_29K;
754 break;
756 case bfd_arch_arm:
757 if (machine == 0) arch_flags = M_ARM;
758 break;
760 case bfd_arch_mips:
761 switch (machine) {
762 case 0:
763 case bfd_mach_mips3000:
764 case bfd_mach_mips3900:
765 arch_flags = M_MIPS1;
766 break;
767 case bfd_mach_mips6000:
768 arch_flags = M_MIPS2;
769 break;
770 case bfd_mach_mips4000:
771 case bfd_mach_mips4010:
772 case bfd_mach_mips4100:
773 case bfd_mach_mips4300:
774 case bfd_mach_mips4400:
775 case bfd_mach_mips4600:
776 case bfd_mach_mips4650:
777 case bfd_mach_mips8000:
778 case bfd_mach_mips10000:
779 case bfd_mach_mips16:
780 case bfd_mach_mips32:
781 case bfd_mach_mips32_4k:
782 case bfd_mach_mips5:
783 case bfd_mach_mips64:
784 case bfd_mach_mips_sb1:
785 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
786 arch_flags = M_MIPS2;
787 break;
788 default:
789 arch_flags = M_UNKNOWN;
790 break;
792 break;
794 case bfd_arch_ns32k:
795 switch (machine) {
796 case 0: arch_flags = M_NS32532; break;
797 case 32032: arch_flags = M_NS32032; break;
798 case 32532: arch_flags = M_NS32532; break;
799 default: arch_flags = M_UNKNOWN; break;
801 break;
803 case bfd_arch_vax:
804 *unknown = false;
805 break;
807 case bfd_arch_cris:
808 if (machine == 0 || machine == 255) arch_flags = M_CRIS;
809 break;
811 default:
812 arch_flags = M_UNKNOWN;
815 if (arch_flags != M_UNKNOWN)
816 *unknown = false;
818 return arch_flags;
822 FUNCTION
823 aout_@var{size}_set_arch_mach
825 SYNOPSIS
826 boolean aout_@var{size}_set_arch_mach,
827 (bfd *,
828 enum bfd_architecture arch,
829 unsigned long machine));
831 DESCRIPTION
832 Set the architecture and the machine of the BFD @var{abfd} to the
833 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
834 can support the architecture required.
837 boolean
838 NAME(aout,set_arch_mach) (abfd, arch, machine)
839 bfd *abfd;
840 enum bfd_architecture arch;
841 unsigned long machine;
843 if (! bfd_default_set_arch_mach (abfd, arch, machine))
844 return false;
846 if (arch != bfd_arch_unknown)
848 boolean unknown;
850 NAME(aout,machine_type) (arch, machine, &unknown);
851 if (unknown)
852 return false;
855 /* Determine the size of a relocation entry */
856 switch (arch) {
857 case bfd_arch_sparc:
858 case bfd_arch_a29k:
859 case bfd_arch_mips:
860 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
861 break;
862 default:
863 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
864 break;
867 return (*aout_backend_info(abfd)->set_sizes) (abfd);
870 static void
871 adjust_o_magic (abfd, execp)
872 bfd *abfd;
873 struct internal_exec *execp;
875 file_ptr pos = adata (abfd).exec_bytes_size;
876 bfd_vma vma = 0;
877 int pad = 0;
879 /* Text. */
880 obj_textsec(abfd)->filepos = pos;
881 if (!obj_textsec(abfd)->user_set_vma)
882 obj_textsec(abfd)->vma = vma;
883 else
884 vma = obj_textsec(abfd)->vma;
886 pos += obj_textsec(abfd)->_raw_size;
887 vma += obj_textsec(abfd)->_raw_size;
889 /* Data. */
890 if (!obj_datasec(abfd)->user_set_vma)
892 #if 0 /* ?? Does alignment in the file image really matter? */
893 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
894 #endif
895 obj_textsec(abfd)->_raw_size += pad;
896 pos += pad;
897 vma += pad;
898 obj_datasec(abfd)->vma = vma;
900 else
901 vma = obj_datasec(abfd)->vma;
902 obj_datasec(abfd)->filepos = pos;
903 pos += obj_datasec(abfd)->_raw_size;
904 vma += obj_datasec(abfd)->_raw_size;
906 /* BSS. */
907 if (!obj_bsssec(abfd)->user_set_vma)
909 #if 0
910 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
911 #endif
912 obj_datasec(abfd)->_raw_size += pad;
913 pos += pad;
914 vma += pad;
915 obj_bsssec(abfd)->vma = vma;
917 else
919 /* The VMA of the .bss section is set by the the VMA of the
920 .data section plus the size of the .data section. We may
921 need to add padding bytes to make this true. */
922 pad = obj_bsssec (abfd)->vma - vma;
923 if (pad > 0)
925 obj_datasec (abfd)->_raw_size += pad;
926 pos += pad;
929 obj_bsssec(abfd)->filepos = pos;
931 /* Fix up the exec header. */
932 execp->a_text = obj_textsec(abfd)->_raw_size;
933 execp->a_data = obj_datasec(abfd)->_raw_size;
934 execp->a_bss = obj_bsssec(abfd)->_raw_size;
935 N_SET_MAGIC (*execp, OMAGIC);
938 static void
939 adjust_z_magic (abfd, execp)
940 bfd *abfd;
941 struct internal_exec *execp;
943 bfd_size_type data_pad, text_pad;
944 file_ptr text_end;
945 CONST struct aout_backend_data *abdp;
946 int ztih; /* Nonzero if text includes exec header. */
948 abdp = aout_backend_info (abfd);
950 /* Text. */
951 ztih = (abdp != NULL
952 && (abdp->text_includes_header
953 || obj_aout_subformat (abfd) == q_magic_format));
954 obj_textsec(abfd)->filepos = (ztih
955 ? adata(abfd).exec_bytes_size
956 : adata(abfd).zmagic_disk_block_size);
957 if (! obj_textsec(abfd)->user_set_vma)
959 /* ?? Do we really need to check for relocs here? */
960 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
962 : (ztih
963 ? (abdp->default_text_vma
964 + adata(abfd).exec_bytes_size)
965 : abdp->default_text_vma));
966 text_pad = 0;
968 else
970 /* The .text section is being loaded at an unusual address. We
971 may need to pad it such that the .data section starts at a page
972 boundary. */
973 if (ztih)
974 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
975 & (adata (abfd).page_size - 1));
976 else
977 text_pad = ((- obj_textsec (abfd)->vma)
978 & (adata (abfd).page_size - 1));
981 /* Find start of data. */
982 if (ztih)
984 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
985 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
987 else
989 /* Note that if page_size == zmagic_disk_block_size, then
990 filepos == page_size, and this case is the same as the ztih
991 case. */
992 text_end = obj_textsec (abfd)->_raw_size;
993 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
994 text_end += obj_textsec (abfd)->filepos;
996 obj_textsec(abfd)->_raw_size += text_pad;
997 text_end += text_pad;
999 /* Data. */
1000 if (!obj_datasec(abfd)->user_set_vma)
1002 bfd_vma vma;
1003 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
1004 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1006 if (abdp && abdp->zmagic_mapped_contiguous)
1008 text_pad = (obj_datasec(abfd)->vma
1009 - obj_textsec(abfd)->vma
1010 - obj_textsec(abfd)->_raw_size);
1011 obj_textsec(abfd)->_raw_size += text_pad;
1013 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
1014 + obj_textsec(abfd)->_raw_size);
1016 /* Fix up exec header while we're at it. */
1017 execp->a_text = obj_textsec(abfd)->_raw_size;
1018 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1019 execp->a_text += adata(abfd).exec_bytes_size;
1020 if (obj_aout_subformat (abfd) == q_magic_format)
1021 N_SET_MAGIC (*execp, QMAGIC);
1022 else
1023 N_SET_MAGIC (*execp, ZMAGIC);
1025 /* Spec says data section should be rounded up to page boundary. */
1026 obj_datasec(abfd)->_raw_size
1027 = align_power (obj_datasec(abfd)->_raw_size,
1028 obj_bsssec(abfd)->alignment_power);
1029 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
1030 adata(abfd).page_size);
1031 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
1033 /* BSS. */
1034 if (!obj_bsssec(abfd)->user_set_vma)
1035 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
1036 + obj_datasec(abfd)->_raw_size);
1037 /* If the BSS immediately follows the data section and extra space
1038 in the page is left after the data section, fudge data
1039 in the header so that the bss section looks smaller by that
1040 amount. We'll start the bss section there, and lie to the OS.
1041 (Note that a linker script, as well as the above assignment,
1042 could have explicitly set the BSS vma to immediately follow
1043 the data section.) */
1044 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
1045 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
1046 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
1047 obj_bsssec(abfd)->_raw_size - data_pad;
1048 else
1049 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1052 static void
1053 adjust_n_magic (abfd, execp)
1054 bfd *abfd;
1055 struct internal_exec *execp;
1057 file_ptr pos = adata(abfd).exec_bytes_size;
1058 bfd_vma vma = 0;
1059 int pad;
1061 /* Text. */
1062 obj_textsec(abfd)->filepos = pos;
1063 if (!obj_textsec(abfd)->user_set_vma)
1064 obj_textsec(abfd)->vma = vma;
1065 else
1066 vma = obj_textsec(abfd)->vma;
1067 pos += obj_textsec(abfd)->_raw_size;
1068 vma += obj_textsec(abfd)->_raw_size;
1070 /* Data. */
1071 obj_datasec(abfd)->filepos = pos;
1072 if (!obj_datasec(abfd)->user_set_vma)
1073 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1074 vma = obj_datasec(abfd)->vma;
1076 /* Since BSS follows data immediately, see if it needs alignment. */
1077 vma += obj_datasec(abfd)->_raw_size;
1078 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
1079 obj_datasec(abfd)->_raw_size += pad;
1080 pos += obj_datasec(abfd)->_raw_size;
1082 /* BSS. */
1083 if (!obj_bsssec(abfd)->user_set_vma)
1084 obj_bsssec(abfd)->vma = vma;
1085 else
1086 vma = obj_bsssec(abfd)->vma;
1088 /* Fix up exec header. */
1089 execp->a_text = obj_textsec(abfd)->_raw_size;
1090 execp->a_data = obj_datasec(abfd)->_raw_size;
1091 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1092 N_SET_MAGIC (*execp, NMAGIC);
1095 boolean
1096 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1097 bfd *abfd;
1098 bfd_size_type *text_size;
1099 file_ptr *text_end ATTRIBUTE_UNUSED;
1101 struct internal_exec *execp = exec_hdr (abfd);
1103 if (! NAME(aout,make_sections) (abfd))
1104 return false;
1106 if (adata(abfd).magic != undecided_magic)
1107 return true;
1109 obj_textsec(abfd)->_raw_size =
1110 align_power(obj_textsec(abfd)->_raw_size,
1111 obj_textsec(abfd)->alignment_power);
1113 *text_size = obj_textsec (abfd)->_raw_size;
1114 /* Rule (heuristic) for when to pad to a new page. Note that there
1115 are (at least) two ways demand-paged (ZMAGIC) files have been
1116 handled. Most Berkeley-based systems start the text segment at
1117 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1118 segment right after the exec header; the latter is counted in the
1119 text segment size, and is paged in by the kernel with the rest of
1120 the text. */
1122 /* This perhaps isn't the right way to do this, but made it simpler for me
1123 to understand enough to implement it. Better would probably be to go
1124 right from BFD flags to alignment/positioning characteristics. But the
1125 old code was sloppy enough about handling the flags, and had enough
1126 other magic, that it was a little hard for me to understand. I think
1127 I understand it better now, but I haven't time to do the cleanup this
1128 minute. */
1130 if (abfd->flags & D_PAGED)
1131 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1132 adata(abfd).magic = z_magic;
1133 else if (abfd->flags & WP_TEXT)
1134 adata(abfd).magic = n_magic;
1135 else
1136 adata(abfd).magic = o_magic;
1138 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1139 #if __GNUC__ >= 2
1140 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1141 ({ char *str;
1142 switch (adata(abfd).magic) {
1143 case n_magic: str = "NMAGIC"; break;
1144 case o_magic: str = "OMAGIC"; break;
1145 case z_magic: str = "ZMAGIC"; break;
1146 default: abort ();
1148 str;
1150 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1151 obj_textsec(abfd)->alignment_power,
1152 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1153 obj_datasec(abfd)->alignment_power,
1154 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
1155 obj_bsssec(abfd)->alignment_power);
1156 #endif
1157 #endif
1159 switch (adata(abfd).magic)
1161 case o_magic:
1162 adjust_o_magic (abfd, execp);
1163 break;
1164 case z_magic:
1165 adjust_z_magic (abfd, execp);
1166 break;
1167 case n_magic:
1168 adjust_n_magic (abfd, execp);
1169 break;
1170 default:
1171 abort ();
1174 #ifdef BFD_AOUT_DEBUG
1175 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1176 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1177 obj_textsec(abfd)->filepos,
1178 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1179 obj_datasec(abfd)->filepos,
1180 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
1181 #endif
1183 return true;
1187 FUNCTION
1188 aout_@var{size}_new_section_hook
1190 SYNOPSIS
1191 boolean aout_@var{size}_new_section_hook,
1192 (bfd *abfd,
1193 asection *newsect));
1195 DESCRIPTION
1196 Called by the BFD in response to a @code{bfd_make_section}
1197 request.
1199 boolean
1200 NAME(aout,new_section_hook) (abfd, newsect)
1201 bfd *abfd;
1202 asection *newsect;
1204 /* align to double at least */
1205 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1207 if (bfd_get_format (abfd) == bfd_object)
1209 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1210 obj_textsec(abfd)= newsect;
1211 newsect->target_index = N_TEXT;
1212 return true;
1215 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1216 obj_datasec(abfd) = newsect;
1217 newsect->target_index = N_DATA;
1218 return true;
1221 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1222 obj_bsssec(abfd) = newsect;
1223 newsect->target_index = N_BSS;
1224 return true;
1229 /* We allow more than three sections internally */
1230 return true;
1233 boolean
1234 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1235 bfd *abfd;
1236 sec_ptr section;
1237 PTR location;
1238 file_ptr offset;
1239 bfd_size_type count;
1241 file_ptr text_end;
1242 bfd_size_type text_size;
1244 if (! abfd->output_has_begun)
1246 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1247 return false;
1250 if (section == obj_bsssec (abfd))
1252 bfd_set_error (bfd_error_no_contents);
1253 return false;
1256 if (section != obj_textsec (abfd)
1257 && section != obj_datasec (abfd))
1259 (*_bfd_error_handler)
1260 (_("%s: can not represent section `%s' in a.out object file format"),
1261 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1262 bfd_set_error (bfd_error_nonrepresentable_section);
1263 return false;
1266 if (count != 0)
1268 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1269 || bfd_write (location, 1, count, abfd) != count)
1270 return false;
1273 return true;
1276 /* Read the external symbols from an a.out file. */
1278 static boolean
1279 aout_get_external_symbols (abfd)
1280 bfd *abfd;
1282 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1284 bfd_size_type count;
1285 struct external_nlist *syms;
1287 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1289 #ifdef USE_MMAP
1290 if (bfd_get_file_window (abfd,
1291 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms,
1292 &obj_aout_sym_window (abfd), true) == false)
1293 return false;
1294 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1295 #else
1296 /* We allocate using malloc to make the values easy to free
1297 later on. If we put them on the objalloc it might not be
1298 possible to free them. */
1299 syms = ((struct external_nlist *)
1300 bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1301 if (syms == (struct external_nlist *) NULL && count != 0)
1302 return false;
1304 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1305 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1306 != exec_hdr (abfd)->a_syms))
1308 free (syms);
1309 return false;
1311 #endif
1313 obj_aout_external_syms (abfd) = syms;
1314 obj_aout_external_sym_count (abfd) = count;
1317 if (obj_aout_external_strings (abfd) == NULL
1318 && exec_hdr (abfd)->a_syms != 0)
1320 unsigned char string_chars[BYTES_IN_WORD];
1321 bfd_size_type stringsize;
1322 char *strings;
1324 /* Get the size of the strings. */
1325 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1326 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1327 != BYTES_IN_WORD))
1328 return false;
1329 stringsize = GET_WORD (abfd, string_chars);
1331 #ifdef USE_MMAP
1332 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1333 &obj_aout_string_window (abfd), true) == false)
1334 return false;
1335 strings = (char *) obj_aout_string_window (abfd).data;
1336 #else
1337 strings = (char *) bfd_malloc ((size_t) stringsize + 1);
1338 if (strings == NULL)
1339 return false;
1341 /* Skip space for the string count in the buffer for convenience
1342 when using indexes. */
1343 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1344 abfd)
1345 != stringsize - BYTES_IN_WORD)
1347 free (strings);
1348 return false;
1350 #endif
1352 /* Ensure that a zero index yields an empty string. */
1353 strings[0] = '\0';
1355 strings[stringsize - 1] = 0;
1357 obj_aout_external_strings (abfd) = strings;
1358 obj_aout_external_string_size (abfd) = stringsize;
1361 return true;
1364 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1365 and symbol->value fields of CACHE_PTR will be set from the a.out
1366 nlist structure. This function is responsible for setting
1367 symbol->flags and symbol->section, and adjusting symbol->value. */
1369 static boolean
1370 translate_from_native_sym_flags (abfd, cache_ptr)
1371 bfd *abfd;
1372 aout_symbol_type *cache_ptr;
1374 flagword visible;
1376 if ((cache_ptr->type & N_STAB) != 0
1377 || cache_ptr->type == N_FN)
1379 asection *sec;
1381 /* This is a debugging symbol. */
1383 cache_ptr->symbol.flags = BSF_DEBUGGING;
1385 /* Work out the symbol section. */
1386 switch (cache_ptr->type & N_TYPE)
1388 case N_TEXT:
1389 case N_FN:
1390 sec = obj_textsec (abfd);
1391 break;
1392 case N_DATA:
1393 sec = obj_datasec (abfd);
1394 break;
1395 case N_BSS:
1396 sec = obj_bsssec (abfd);
1397 break;
1398 default:
1399 case N_ABS:
1400 sec = bfd_abs_section_ptr;
1401 break;
1404 cache_ptr->symbol.section = sec;
1405 cache_ptr->symbol.value -= sec->vma;
1407 return true;
1410 /* Get the default visibility. This does not apply to all types, so
1411 we just hold it in a local variable to use if wanted. */
1412 if ((cache_ptr->type & N_EXT) == 0)
1413 visible = BSF_LOCAL;
1414 else
1415 visible = BSF_GLOBAL;
1417 switch (cache_ptr->type)
1419 default:
1420 case N_ABS: case N_ABS | N_EXT:
1421 cache_ptr->symbol.section = bfd_abs_section_ptr;
1422 cache_ptr->symbol.flags = visible;
1423 break;
1425 case N_UNDF | N_EXT:
1426 if (cache_ptr->symbol.value != 0)
1428 /* This is a common symbol. */
1429 cache_ptr->symbol.flags = BSF_GLOBAL;
1430 cache_ptr->symbol.section = bfd_com_section_ptr;
1432 else
1434 cache_ptr->symbol.flags = 0;
1435 cache_ptr->symbol.section = bfd_und_section_ptr;
1437 break;
1439 case N_TEXT: case N_TEXT | N_EXT:
1440 cache_ptr->symbol.section = obj_textsec (abfd);
1441 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1442 cache_ptr->symbol.flags = visible;
1443 break;
1445 /* N_SETV symbols used to represent set vectors placed in the
1446 data section. They are no longer generated. Theoretically,
1447 it was possible to extract the entries and combine them with
1448 new ones, although I don't know if that was ever actually
1449 done. Unless that feature is restored, treat them as data
1450 symbols. */
1451 case N_SETV: case N_SETV | N_EXT:
1452 case N_DATA: case N_DATA | N_EXT:
1453 cache_ptr->symbol.section = obj_datasec (abfd);
1454 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1455 cache_ptr->symbol.flags = visible;
1456 break;
1458 case N_BSS: case N_BSS | N_EXT:
1459 cache_ptr->symbol.section = obj_bsssec (abfd);
1460 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1461 cache_ptr->symbol.flags = visible;
1462 break;
1464 case N_SETA: case N_SETA | N_EXT:
1465 case N_SETT: case N_SETT | N_EXT:
1466 case N_SETD: case N_SETD | N_EXT:
1467 case N_SETB: case N_SETB | N_EXT:
1469 /* This code is no longer needed. It used to be used to make
1470 the linker handle set symbols, but they are now handled in
1471 the add_symbols routine instead. */
1472 #if 0
1473 asection *section;
1474 arelent_chain *reloc;
1475 asection *into_section;
1477 /* This is a set symbol. The name of the symbol is the name
1478 of the set (e.g., __CTOR_LIST__). The value of the symbol
1479 is the value to add to the set. We create a section with
1480 the same name as the symbol, and add a reloc to insert the
1481 appropriate value into the section.
1483 This action is actually obsolete; it used to make the
1484 linker do the right thing, but the linker no longer uses
1485 this function. */
1487 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1488 if (section == NULL)
1490 char *copy;
1492 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1493 if (copy == NULL)
1494 return false;
1496 strcpy (copy, cache_ptr->symbol.name);
1497 section = bfd_make_section (abfd, copy);
1498 if (section == NULL)
1499 return false;
1502 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1503 if (reloc == NULL)
1504 return false;
1506 /* Build a relocation entry for the constructor. */
1507 switch (cache_ptr->type & N_TYPE)
1509 case N_SETA:
1510 into_section = bfd_abs_section_ptr;
1511 cache_ptr->type = N_ABS;
1512 break;
1513 case N_SETT:
1514 into_section = obj_textsec (abfd);
1515 cache_ptr->type = N_TEXT;
1516 break;
1517 case N_SETD:
1518 into_section = obj_datasec (abfd);
1519 cache_ptr->type = N_DATA;
1520 break;
1521 case N_SETB:
1522 into_section = obj_bsssec (abfd);
1523 cache_ptr->type = N_BSS;
1524 break;
1527 /* Build a relocation pointing into the constructor section
1528 pointing at the symbol in the set vector specified. */
1529 reloc->relent.addend = cache_ptr->symbol.value;
1530 cache_ptr->symbol.section = into_section;
1531 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1533 /* We modify the symbol to belong to a section depending upon
1534 the name of the symbol, and add to the size of the section
1535 to contain a pointer to the symbol. Build a reloc entry to
1536 relocate to this symbol attached to this section. */
1537 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1539 section->reloc_count++;
1540 section->alignment_power = 2;
1542 reloc->next = section->constructor_chain;
1543 section->constructor_chain = reloc;
1544 reloc->relent.address = section->_raw_size;
1545 section->_raw_size += BYTES_IN_WORD;
1547 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd);
1549 #endif /* 0 */
1551 switch (cache_ptr->type & N_TYPE)
1553 case N_SETA:
1554 cache_ptr->symbol.section = bfd_abs_section_ptr;
1555 break;
1556 case N_SETT:
1557 cache_ptr->symbol.section = obj_textsec (abfd);
1558 break;
1559 case N_SETD:
1560 cache_ptr->symbol.section = obj_datasec (abfd);
1561 break;
1562 case N_SETB:
1563 cache_ptr->symbol.section = obj_bsssec (abfd);
1564 break;
1567 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1569 break;
1571 case N_WARNING:
1572 /* This symbol is the text of a warning message. The next
1573 symbol is the symbol to associate the warning with. If a
1574 reference is made to that symbol, a warning is issued. */
1575 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1576 cache_ptr->symbol.section = bfd_abs_section_ptr;
1577 break;
1579 case N_INDR: case N_INDR | N_EXT:
1580 /* An indirect symbol. This consists of two symbols in a row.
1581 The first symbol is the name of the indirection. The second
1582 symbol is the name of the target. A reference to the first
1583 symbol becomes a reference to the second. */
1584 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1585 cache_ptr->symbol.section = bfd_ind_section_ptr;
1586 break;
1588 case N_WEAKU:
1589 cache_ptr->symbol.section = bfd_und_section_ptr;
1590 cache_ptr->symbol.flags = BSF_WEAK;
1591 break;
1593 case N_WEAKA:
1594 cache_ptr->symbol.section = bfd_abs_section_ptr;
1595 cache_ptr->symbol.flags = BSF_WEAK;
1596 break;
1598 case N_WEAKT:
1599 cache_ptr->symbol.section = obj_textsec (abfd);
1600 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1601 cache_ptr->symbol.flags = BSF_WEAK;
1602 break;
1604 case N_WEAKD:
1605 cache_ptr->symbol.section = obj_datasec (abfd);
1606 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1607 cache_ptr->symbol.flags = BSF_WEAK;
1608 break;
1610 case N_WEAKB:
1611 cache_ptr->symbol.section = obj_bsssec (abfd);
1612 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1613 cache_ptr->symbol.flags = BSF_WEAK;
1614 break;
1617 return true;
1620 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1622 static boolean
1623 translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1624 bfd *abfd;
1625 asymbol *cache_ptr;
1626 struct external_nlist *sym_pointer;
1628 bfd_vma value = cache_ptr->value;
1629 asection *sec;
1630 bfd_vma off;
1632 /* Mask out any existing type bits in case copying from one section
1633 to another. */
1634 sym_pointer->e_type[0] &= ~N_TYPE;
1636 sec = bfd_get_section (cache_ptr);
1637 off = 0;
1639 if (sec == NULL)
1641 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1642 file. */
1643 (*_bfd_error_handler)
1644 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1645 bfd_get_filename (abfd),
1646 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1647 bfd_set_error (bfd_error_nonrepresentable_section);
1648 return false;
1651 if (sec->output_section != NULL)
1653 off = sec->output_offset;
1654 sec = sec->output_section;
1657 if (bfd_is_abs_section (sec))
1658 sym_pointer->e_type[0] |= N_ABS;
1659 else if (sec == obj_textsec (abfd))
1660 sym_pointer->e_type[0] |= N_TEXT;
1661 else if (sec == obj_datasec (abfd))
1662 sym_pointer->e_type[0] |= N_DATA;
1663 else if (sec == obj_bsssec (abfd))
1664 sym_pointer->e_type[0] |= N_BSS;
1665 else if (bfd_is_und_section (sec))
1666 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1667 else if (bfd_is_ind_section (sec))
1668 sym_pointer->e_type[0] = N_INDR;
1669 else if (bfd_is_com_section (sec))
1670 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1671 else
1673 (*_bfd_error_handler)
1674 (_("%s: can not represent section `%s' in a.out object file format"),
1675 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1676 bfd_set_error (bfd_error_nonrepresentable_section);
1677 return false;
1680 /* Turn the symbol from section relative to absolute again */
1681 value += sec->vma + off;
1683 if ((cache_ptr->flags & BSF_WARNING) != 0)
1684 sym_pointer->e_type[0] = N_WARNING;
1686 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1687 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1688 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1689 sym_pointer->e_type[0] |= N_EXT;
1690 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1691 sym_pointer->e_type[0] &= ~N_EXT;
1693 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1695 int type = ((aout_symbol_type *) cache_ptr)->type;
1696 switch (type)
1698 case N_ABS: type = N_SETA; break;
1699 case N_TEXT: type = N_SETT; break;
1700 case N_DATA: type = N_SETD; break;
1701 case N_BSS: type = N_SETB; break;
1703 sym_pointer->e_type[0] = type;
1706 if ((cache_ptr->flags & BSF_WEAK) != 0)
1708 int type;
1710 switch (sym_pointer->e_type[0] & N_TYPE)
1712 default:
1713 case N_ABS: type = N_WEAKA; break;
1714 case N_TEXT: type = N_WEAKT; break;
1715 case N_DATA: type = N_WEAKD; break;
1716 case N_BSS: type = N_WEAKB; break;
1717 case N_UNDF: type = N_WEAKU; break;
1719 sym_pointer->e_type[0] = type;
1722 PUT_WORD(abfd, value, sym_pointer->e_value);
1724 return true;
1727 /* Native-level interface to symbols. */
1729 asymbol *
1730 NAME(aout,make_empty_symbol) (abfd)
1731 bfd *abfd;
1733 aout_symbol_type *new =
1734 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1735 if (!new)
1736 return NULL;
1737 new->symbol.the_bfd = abfd;
1739 return &new->symbol;
1742 /* Translate a set of internal symbols into external symbols. */
1744 boolean
1745 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1746 bfd *abfd;
1747 aout_symbol_type *in;
1748 struct external_nlist *ext;
1749 bfd_size_type count;
1750 char *str;
1751 bfd_size_type strsize;
1752 boolean dynamic;
1754 struct external_nlist *ext_end;
1756 ext_end = ext + count;
1757 for (; ext < ext_end; ext++, in++)
1759 bfd_vma x;
1761 x = GET_WORD (abfd, ext->e_strx);
1762 in->symbol.the_bfd = abfd;
1764 /* For the normal symbols, the zero index points at the number
1765 of bytes in the string table but is to be interpreted as the
1766 null string. For the dynamic symbols, the number of bytes in
1767 the string table is stored in the __DYNAMIC structure and the
1768 zero index points at an actual string. */
1769 if (x == 0 && ! dynamic)
1770 in->symbol.name = "";
1771 else if (x < strsize)
1772 in->symbol.name = str + x;
1773 else
1774 return false;
1776 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1777 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1778 in->other = bfd_h_get_8 (abfd, ext->e_other);
1779 in->type = bfd_h_get_8 (abfd, ext->e_type);
1780 in->symbol.udata.p = NULL;
1782 if (! translate_from_native_sym_flags (abfd, in))
1783 return false;
1785 if (dynamic)
1786 in->symbol.flags |= BSF_DYNAMIC;
1789 return true;
1792 /* We read the symbols into a buffer, which is discarded when this
1793 function exits. We read the strings into a buffer large enough to
1794 hold them all plus all the cached symbol entries. */
1796 boolean
1797 NAME(aout,slurp_symbol_table) (abfd)
1798 bfd *abfd;
1800 struct external_nlist *old_external_syms;
1801 aout_symbol_type *cached;
1802 size_t cached_size;
1804 /* If there's no work to be done, don't do any */
1805 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1806 return true;
1808 old_external_syms = obj_aout_external_syms (abfd);
1810 if (! aout_get_external_symbols (abfd))
1811 return false;
1813 cached_size = (obj_aout_external_sym_count (abfd)
1814 * sizeof (aout_symbol_type));
1815 cached = (aout_symbol_type *) bfd_malloc (cached_size);
1816 if (cached == NULL && cached_size != 0)
1817 return false;
1818 if (cached_size != 0)
1819 memset (cached, 0, cached_size);
1821 /* Convert from external symbol information to internal. */
1822 if (! (NAME(aout,translate_symbol_table)
1823 (abfd, cached,
1824 obj_aout_external_syms (abfd),
1825 obj_aout_external_sym_count (abfd),
1826 obj_aout_external_strings (abfd),
1827 obj_aout_external_string_size (abfd),
1828 false)))
1830 free (cached);
1831 return false;
1834 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1836 obj_aout_symbols (abfd) = cached;
1838 /* It is very likely that anybody who calls this function will not
1839 want the external symbol information, so if it was allocated
1840 because of our call to aout_get_external_symbols, we free it up
1841 right away to save space. */
1842 if (old_external_syms == (struct external_nlist *) NULL
1843 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1845 #ifdef USE_MMAP
1846 bfd_free_window (&obj_aout_sym_window (abfd));
1847 #else
1848 free (obj_aout_external_syms (abfd));
1849 #endif
1850 obj_aout_external_syms (abfd) = NULL;
1853 return true;
1856 /* We use a hash table when writing out symbols so that we only write
1857 out a particular string once. This helps particularly when the
1858 linker writes out stabs debugging entries, because each different
1859 contributing object file tends to have many duplicate stabs
1860 strings.
1862 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1863 if BFD_TRADITIONAL_FORMAT is set. */
1865 static bfd_size_type add_to_stringtab
1866 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean));
1867 static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *));
1869 /* Get the index of a string in a strtab, adding it if it is not
1870 already present. */
1872 static INLINE bfd_size_type
1873 add_to_stringtab (abfd, tab, str, copy)
1874 bfd *abfd;
1875 struct bfd_strtab_hash *tab;
1876 const char *str;
1877 boolean copy;
1879 boolean hash;
1880 bfd_size_type index;
1882 /* An index of 0 always means the empty string. */
1883 if (str == 0 || *str == '\0')
1884 return 0;
1886 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1887 doesn't understand a hashed string table. */
1888 hash = true;
1889 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1890 hash = false;
1892 index = _bfd_stringtab_add (tab, str, hash, copy);
1894 if (index != (bfd_size_type) -1)
1896 /* Add BYTES_IN_WORD to the return value to account for the
1897 space taken up by the string table size. */
1898 index += BYTES_IN_WORD;
1901 return index;
1904 /* Write out a strtab. ABFD is already at the right location in the
1905 file. */
1907 static boolean
1908 emit_stringtab (abfd, tab)
1909 register bfd *abfd;
1910 struct bfd_strtab_hash *tab;
1912 bfd_byte buffer[BYTES_IN_WORD];
1914 /* The string table starts with the size. */
1915 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1916 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1917 return false;
1919 return _bfd_stringtab_emit (abfd, tab);
1922 boolean
1923 NAME(aout,write_syms) (abfd)
1924 bfd *abfd;
1926 unsigned int count ;
1927 asymbol **generic = bfd_get_outsymbols (abfd);
1928 struct bfd_strtab_hash *strtab;
1930 strtab = _bfd_stringtab_init ();
1931 if (strtab == NULL)
1932 return false;
1934 for (count = 0; count < bfd_get_symcount (abfd); count++)
1936 asymbol *g = generic[count];
1937 bfd_size_type indx;
1938 struct external_nlist nsp;
1940 indx = add_to_stringtab (abfd, strtab, g->name, false);
1941 if (indx == (bfd_size_type) -1)
1942 goto error_return;
1943 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1945 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
1947 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
1948 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
1949 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
1951 else
1953 bfd_h_put_16(abfd,0, nsp.e_desc);
1954 bfd_h_put_8(abfd, 0, nsp.e_other);
1955 bfd_h_put_8(abfd, 0, nsp.e_type);
1958 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1959 goto error_return;
1961 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
1962 != EXTERNAL_NLIST_SIZE)
1963 goto error_return;
1965 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1966 here, at the end. */
1967 g->KEEPIT = count;
1970 if (! emit_stringtab (abfd, strtab))
1971 goto error_return;
1973 _bfd_stringtab_free (strtab);
1975 return true;
1977 error_return:
1978 _bfd_stringtab_free (strtab);
1979 return false;
1982 long
1983 NAME(aout,get_symtab) (abfd, location)
1984 bfd *abfd;
1985 asymbol **location;
1987 unsigned int counter = 0;
1988 aout_symbol_type *symbase;
1990 if (!NAME(aout,slurp_symbol_table) (abfd))
1991 return -1;
1993 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
1994 *(location++) = (asymbol *) ( symbase++);
1995 *location++ =0;
1996 return bfd_get_symcount (abfd);
1999 /* Standard reloc stuff */
2000 /* Output standard relocation information to a file in target byte order. */
2002 extern void NAME(aout,swap_std_reloc_out)
2003 PARAMS ((bfd *, arelent *, struct reloc_std_external *));
2005 void
2006 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
2007 bfd *abfd;
2008 arelent *g;
2009 struct reloc_std_external *natptr;
2011 int r_index;
2012 asymbol *sym = *(g->sym_ptr_ptr);
2013 int r_extern;
2014 unsigned int r_length;
2015 int r_pcrel;
2016 int r_baserel, r_jmptable, r_relative;
2017 asection *output_section = sym->section->output_section;
2019 PUT_WORD(abfd, g->address, natptr->r_address);
2021 r_length = g->howto->size ; /* Size as a power of two */
2022 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
2023 /* XXX This relies on relocs coming from a.out files. */
2024 r_baserel = (g->howto->type & 8) != 0;
2025 r_jmptable = (g->howto->type & 16) != 0;
2026 r_relative = (g->howto->type & 32) != 0;
2028 #if 0
2029 /* For a standard reloc, the addend is in the object file. */
2030 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
2031 #endif
2033 /* name was clobbered by aout_write_syms to be symbol index */
2035 /* If this relocation is relative to a symbol then set the
2036 r_index to the symbols index, and the r_extern bit.
2038 Absolute symbols can come in in two ways, either as an offset
2039 from the abs section, or as a symbol which has an abs value.
2040 check for that here
2043 if (bfd_is_com_section (output_section)
2044 || bfd_is_abs_section (output_section)
2045 || bfd_is_und_section (output_section))
2047 if (bfd_abs_section_ptr->symbol == sym)
2049 /* Whoops, looked like an abs symbol, but is really an offset
2050 from the abs section */
2051 r_index = N_ABS;
2052 r_extern = 0;
2054 else
2056 /* Fill in symbol */
2057 r_extern = 1;
2058 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2062 else
2064 /* Just an ordinary section */
2065 r_extern = 0;
2066 r_index = output_section->target_index;
2069 /* now the fun stuff */
2070 if (bfd_header_big_endian (abfd)) {
2071 natptr->r_index[0] = r_index >> 16;
2072 natptr->r_index[1] = r_index >> 8;
2073 natptr->r_index[2] = r_index;
2074 natptr->r_type[0] =
2075 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
2076 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
2077 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
2078 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
2079 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
2080 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
2081 } else {
2082 natptr->r_index[2] = r_index >> 16;
2083 natptr->r_index[1] = r_index >> 8;
2084 natptr->r_index[0] = r_index;
2085 natptr->r_type[0] =
2086 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
2087 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
2088 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
2089 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
2090 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2091 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2095 /* Extended stuff */
2096 /* Output extended relocation information to a file in target byte order. */
2098 extern void NAME(aout,swap_ext_reloc_out)
2099 PARAMS ((bfd *, arelent *, struct reloc_ext_external *));
2101 void
2102 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2103 bfd *abfd;
2104 arelent *g;
2105 register struct reloc_ext_external *natptr;
2107 int r_index;
2108 int r_extern;
2109 unsigned int r_type;
2110 unsigned int r_addend;
2111 asymbol *sym = *(g->sym_ptr_ptr);
2112 asection *output_section = sym->section->output_section;
2114 PUT_WORD (abfd, g->address, natptr->r_address);
2116 r_type = (unsigned int) g->howto->type;
2118 r_addend = g->addend;
2119 if ((sym->flags & BSF_SECTION_SYM) != 0)
2120 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2122 /* If this relocation is relative to a symbol then set the
2123 r_index to the symbols index, and the r_extern bit.
2125 Absolute symbols can come in in two ways, either as an offset
2126 from the abs section, or as a symbol which has an abs value.
2127 check for that here. */
2129 if (bfd_is_abs_section (bfd_get_section (sym)))
2131 r_extern = 0;
2132 r_index = N_ABS;
2134 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2136 if (bfd_is_und_section (bfd_get_section (sym))
2137 || (sym->flags & BSF_GLOBAL) != 0)
2138 r_extern = 1;
2139 else
2140 r_extern = 0;
2141 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2143 else
2145 /* Just an ordinary section */
2146 r_extern = 0;
2147 r_index = output_section->target_index;
2150 /* now the fun stuff */
2151 if (bfd_header_big_endian (abfd)) {
2152 natptr->r_index[0] = r_index >> 16;
2153 natptr->r_index[1] = r_index >> 8;
2154 natptr->r_index[2] = r_index;
2155 natptr->r_type[0] =
2156 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2157 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2158 } else {
2159 natptr->r_index[2] = r_index >> 16;
2160 natptr->r_index[1] = r_index >> 8;
2161 natptr->r_index[0] = r_index;
2162 natptr->r_type[0] =
2163 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2164 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2167 PUT_WORD (abfd, r_addend, natptr->r_addend);
2170 /* BFD deals internally with all things based from the section they're
2171 in. so, something in 10 bytes into a text section with a base of
2172 50 would have a symbol (.text+10) and know .text vma was 50.
2174 Aout keeps all it's symbols based from zero, so the symbol would
2175 contain 60. This macro subs the base of each section from the value
2176 to give the true offset from the section */
2178 #define MOVE_ADDRESS(ad) \
2179 if (r_extern) { \
2180 /* undefined symbol */ \
2181 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2182 cache_ptr->addend = ad; \
2183 } else { \
2184 /* defined, section relative. replace symbol with pointer to \
2185 symbol which points to section */ \
2186 switch (r_index) { \
2187 case N_TEXT: \
2188 case N_TEXT | N_EXT: \
2189 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2190 cache_ptr->addend = ad - su->textsec->vma; \
2191 break; \
2192 case N_DATA: \
2193 case N_DATA | N_EXT: \
2194 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2195 cache_ptr->addend = ad - su->datasec->vma; \
2196 break; \
2197 case N_BSS: \
2198 case N_BSS | N_EXT: \
2199 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2200 cache_ptr->addend = ad - su->bsssec->vma; \
2201 break; \
2202 default: \
2203 case N_ABS: \
2204 case N_ABS | N_EXT: \
2205 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2206 cache_ptr->addend = ad; \
2207 break; \
2211 void
2212 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2213 bfd *abfd;
2214 struct reloc_ext_external *bytes;
2215 arelent *cache_ptr;
2216 asymbol **symbols;
2217 bfd_size_type symcount;
2219 unsigned int r_index;
2220 int r_extern;
2221 unsigned int r_type;
2222 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2224 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2226 /* now the fun stuff */
2227 if (bfd_header_big_endian (abfd)) {
2228 r_index = (bytes->r_index[0] << 16)
2229 | (bytes->r_index[1] << 8)
2230 | bytes->r_index[2];
2231 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2232 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2233 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2234 } else {
2235 r_index = (bytes->r_index[2] << 16)
2236 | (bytes->r_index[1] << 8)
2237 | bytes->r_index[0];
2238 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2239 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2240 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2243 cache_ptr->howto = howto_table_ext + r_type;
2245 /* Base relative relocs are always against the symbol table,
2246 regardless of the setting of r_extern. r_extern just reflects
2247 whether the symbol the reloc is against is local or global. */
2248 if (r_type == RELOC_BASE10
2249 || r_type == RELOC_BASE13
2250 || r_type == RELOC_BASE22)
2251 r_extern = 1;
2253 if (r_extern && r_index > symcount)
2255 /* We could arrange to return an error, but it might be useful
2256 to see the file even if it is bad. */
2257 r_extern = 0;
2258 r_index = N_ABS;
2261 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2264 void
2265 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2266 bfd *abfd;
2267 struct reloc_std_external *bytes;
2268 arelent *cache_ptr;
2269 asymbol **symbols;
2270 bfd_size_type symcount;
2272 unsigned int r_index;
2273 int r_extern;
2274 unsigned int r_length;
2275 int r_pcrel;
2276 int r_baserel, r_jmptable, r_relative;
2277 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2278 unsigned int howto_idx;
2280 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2282 /* now the fun stuff */
2283 if (bfd_header_big_endian (abfd)) {
2284 r_index = (bytes->r_index[0] << 16)
2285 | (bytes->r_index[1] << 8)
2286 | bytes->r_index[2];
2287 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2288 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2289 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2290 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2291 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2292 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2293 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2294 } else {
2295 r_index = (bytes->r_index[2] << 16)
2296 | (bytes->r_index[1] << 8)
2297 | bytes->r_index[0];
2298 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2299 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2300 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2301 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2302 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2303 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2304 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2307 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2308 + 16 * r_jmptable + 32 * r_relative;
2309 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2310 cache_ptr->howto = howto_table_std + howto_idx;
2311 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2313 /* Base relative relocs are always against the symbol table,
2314 regardless of the setting of r_extern. r_extern just reflects
2315 whether the symbol the reloc is against is local or global. */
2316 if (r_baserel)
2317 r_extern = 1;
2319 if (r_extern && r_index > symcount)
2321 /* We could arrange to return an error, but it might be useful
2322 to see the file even if it is bad. */
2323 r_extern = 0;
2324 r_index = N_ABS;
2327 MOVE_ADDRESS(0);
2330 /* Read and swap the relocs for a section. */
2332 boolean
2333 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2334 bfd *abfd;
2335 sec_ptr asect;
2336 asymbol **symbols;
2338 unsigned int count;
2339 bfd_size_type reloc_size;
2340 PTR relocs;
2341 arelent *reloc_cache;
2342 size_t each_size;
2343 unsigned int counter = 0;
2344 arelent *cache_ptr;
2346 if (asect->relocation)
2347 return true;
2349 if (asect->flags & SEC_CONSTRUCTOR)
2350 return true;
2352 if (asect == obj_datasec (abfd))
2353 reloc_size = exec_hdr(abfd)->a_drsize;
2354 else if (asect == obj_textsec (abfd))
2355 reloc_size = exec_hdr(abfd)->a_trsize;
2356 else if (asect == obj_bsssec (abfd))
2357 reloc_size = 0;
2358 else
2360 bfd_set_error (bfd_error_invalid_operation);
2361 return false;
2364 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2365 return false;
2367 each_size = obj_reloc_entry_size (abfd);
2369 count = reloc_size / each_size;
2371 reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent)));
2372 if (reloc_cache == NULL && count != 0)
2373 return false;
2374 memset (reloc_cache, 0, count * sizeof (arelent));
2376 relocs = bfd_malloc ((size_t) reloc_size);
2377 if (relocs == NULL && reloc_size != 0)
2379 free (reloc_cache);
2380 return false;
2383 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2385 free (relocs);
2386 free (reloc_cache);
2387 return false;
2390 cache_ptr = reloc_cache;
2391 if (each_size == RELOC_EXT_SIZE)
2393 register struct reloc_ext_external *rptr =
2394 (struct reloc_ext_external *) relocs;
2396 for (; counter < count; counter++, rptr++, cache_ptr++)
2397 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2398 bfd_get_symcount (abfd));
2400 else
2402 register struct reloc_std_external *rptr =
2403 (struct reloc_std_external *) relocs;
2405 for (; counter < count; counter++, rptr++, cache_ptr++)
2406 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2407 bfd_get_symcount (abfd));
2410 free (relocs);
2412 asect->relocation = reloc_cache;
2413 asect->reloc_count = cache_ptr - reloc_cache;
2415 return true;
2418 /* Write out a relocation section into an object file. */
2420 boolean
2421 NAME(aout,squirt_out_relocs) (abfd, section)
2422 bfd *abfd;
2423 asection *section;
2425 arelent **generic;
2426 unsigned char *native, *natptr;
2427 size_t each_size;
2429 unsigned int count = section->reloc_count;
2430 size_t natsize;
2432 if (count == 0 || section->orelocation == NULL)
2433 return true;
2435 each_size = obj_reloc_entry_size (abfd);
2436 natsize = each_size * count;
2437 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2438 if (!native)
2439 return false;
2441 generic = section->orelocation;
2443 if (each_size == RELOC_EXT_SIZE)
2445 for (natptr = native;
2446 count != 0;
2447 --count, natptr += each_size, ++generic)
2448 MY_swap_ext_reloc_out (abfd, *generic,
2449 (struct reloc_ext_external *) natptr);
2451 else
2453 for (natptr = native;
2454 count != 0;
2455 --count, natptr += each_size, ++generic)
2456 MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr);
2459 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
2460 bfd_release(abfd, native);
2461 return false;
2463 bfd_release (abfd, native);
2465 return true;
2468 /* This is stupid. This function should be a boolean predicate */
2469 long
2470 NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2471 bfd *abfd;
2472 sec_ptr section;
2473 arelent **relptr;
2474 asymbol **symbols;
2476 arelent *tblptr = section->relocation;
2477 unsigned int count;
2479 if (section == obj_bsssec (abfd))
2481 *relptr = NULL;
2482 return 0;
2485 if (!(tblptr || NAME(aout,slurp_reloc_table) (abfd, section, symbols)))
2486 return -1;
2488 if (section->flags & SEC_CONSTRUCTOR) {
2489 arelent_chain *chain = section->constructor_chain;
2490 for (count = 0; count < section->reloc_count; count ++) {
2491 *relptr ++ = &chain->relent;
2492 chain = chain->next;
2495 else {
2496 tblptr = section->relocation;
2498 for (count = 0; count++ < section->reloc_count;)
2500 *relptr++ = tblptr++;
2503 *relptr = 0;
2505 return section->reloc_count;
2508 long
2509 NAME(aout,get_reloc_upper_bound) (abfd, asect)
2510 bfd *abfd;
2511 sec_ptr asect;
2513 if (bfd_get_format (abfd) != bfd_object) {
2514 bfd_set_error (bfd_error_invalid_operation);
2515 return -1;
2517 if (asect->flags & SEC_CONSTRUCTOR) {
2518 return (sizeof (arelent *) * (asect->reloc_count+1));
2521 if (asect == obj_datasec (abfd))
2522 return (sizeof (arelent *)
2523 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
2524 + 1));
2526 if (asect == obj_textsec (abfd))
2527 return (sizeof (arelent *)
2528 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
2529 + 1));
2531 if (asect == obj_bsssec (abfd))
2532 return sizeof (arelent *);
2534 if (asect == obj_bsssec (abfd))
2535 return 0;
2537 bfd_set_error (bfd_error_invalid_operation);
2538 return -1;
2541 long
2542 NAME(aout,get_symtab_upper_bound) (abfd)
2543 bfd *abfd;
2545 if (!NAME(aout,slurp_symbol_table) (abfd))
2546 return -1;
2548 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2551 alent *
2552 NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
2553 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2554 asymbol *ignore_symbol ATTRIBUTE_UNUSED;
2556 return (alent *)NULL;
2559 void
2560 NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
2561 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2562 asymbol *symbol;
2563 symbol_info *ret;
2565 bfd_symbol_info (symbol, ret);
2567 if (ret->type == '?')
2569 int type_code = aout_symbol(symbol)->type & 0xff;
2570 const char *stab_name = bfd_get_stab_name (type_code);
2571 static char buf[10];
2573 if (stab_name == NULL)
2575 sprintf (buf, "(%d)", type_code);
2576 stab_name = buf;
2578 ret->type = '-';
2579 ret->stab_type = type_code;
2580 ret->stab_other = (unsigned) (aout_symbol(symbol)->other & 0xff);
2581 ret->stab_desc = (unsigned) (aout_symbol(symbol)->desc & 0xffff);
2582 ret->stab_name = stab_name;
2586 void
2587 NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
2588 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2589 PTR afile;
2590 asymbol *symbol;
2591 bfd_print_symbol_type how;
2593 FILE *file = (FILE *)afile;
2595 switch (how) {
2596 case bfd_print_symbol_name:
2597 if (symbol->name)
2598 fprintf (file,"%s", symbol->name);
2599 break;
2600 case bfd_print_symbol_more:
2601 fprintf (file,"%4x %2x %2x",(unsigned) (aout_symbol(symbol)->desc & 0xffff),
2602 (unsigned) (aout_symbol(symbol)->other & 0xff),
2603 (unsigned) (aout_symbol(symbol)->type));
2604 break;
2605 case bfd_print_symbol_all:
2607 CONST char *section_name = symbol->section->name;
2609 bfd_print_symbol_vandf((PTR)file,symbol);
2611 fprintf (file," %-5s %04x %02x %02x",
2612 section_name,
2613 (unsigned) (aout_symbol(symbol)->desc & 0xffff),
2614 (unsigned) (aout_symbol(symbol)->other & 0xff),
2615 (unsigned) (aout_symbol(symbol)->type & 0xff));
2616 if (symbol->name)
2617 fprintf (file," %s", symbol->name);
2619 break;
2623 /* If we don't have to allocate more than 1MB to hold the generic
2624 symbols, we use the generic minisymbol methord: it's faster, since
2625 it only translates the symbols once, not multiple times. */
2626 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2628 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2629 symbols. The minisymbol_to_symbol function translates these into
2630 BFD asymbol structures. */
2632 long
2633 NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2634 bfd *abfd;
2635 boolean dynamic;
2636 PTR *minisymsp;
2637 unsigned int *sizep;
2639 if (dynamic)
2641 /* We could handle the dynamic symbols here as well, but it's
2642 easier to hand them off. */
2643 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2646 if (! aout_get_external_symbols (abfd))
2647 return -1;
2649 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2650 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2652 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2654 /* By passing the external symbols back from this routine, we are
2655 giving up control over the memory block. Clear
2656 obj_aout_external_syms, so that we do not try to free it
2657 ourselves. */
2658 obj_aout_external_syms (abfd) = NULL;
2660 *sizep = EXTERNAL_NLIST_SIZE;
2661 return obj_aout_external_sym_count (abfd);
2664 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2665 unmodified a.out symbol. The SYM argument is a structure returned
2666 by bfd_make_empty_symbol, which we fill in here. */
2668 asymbol *
2669 NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2670 bfd *abfd;
2671 boolean dynamic;
2672 const PTR minisym;
2673 asymbol *sym;
2675 if (dynamic
2676 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2677 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2679 memset (sym, 0, sizeof (aout_symbol_type));
2681 /* We call translate_symbol_table to translate a single symbol. */
2682 if (! (NAME(aout,translate_symbol_table)
2683 (abfd,
2684 (aout_symbol_type *) sym,
2685 (struct external_nlist *) minisym,
2686 (bfd_size_type) 1,
2687 obj_aout_external_strings (abfd),
2688 obj_aout_external_string_size (abfd),
2689 false)))
2690 return NULL;
2692 return sym;
2696 provided a BFD, a section and an offset into the section, calculate
2697 and return the name of the source file and the line nearest to the
2698 wanted location.
2701 boolean
2702 NAME(aout,find_nearest_line)
2703 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2704 bfd *abfd;
2705 asection *section;
2706 asymbol **symbols;
2707 bfd_vma offset;
2708 CONST char **filename_ptr;
2709 CONST char **functionname_ptr;
2710 unsigned int *line_ptr;
2712 /* Run down the file looking for the filename, function and linenumber */
2713 asymbol **p;
2714 CONST char *directory_name = NULL;
2715 CONST char *main_file_name = NULL;
2716 CONST char *current_file_name = NULL;
2717 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2718 CONST char *line_directory_name = NULL; /* Value of directory_name at line number. */
2719 bfd_vma low_line_vma = 0;
2720 bfd_vma low_func_vma = 0;
2721 asymbol *func = 0;
2722 size_t filelen, funclen;
2723 char *buf;
2725 *filename_ptr = abfd->filename;
2726 *functionname_ptr = 0;
2727 *line_ptr = 0;
2728 if (symbols != (asymbol **)NULL) {
2729 for (p = symbols; *p; p++) {
2730 aout_symbol_type *q = (aout_symbol_type *) (*p);
2731 next:
2732 switch (q->type){
2733 case N_TEXT:
2734 /* If this looks like a file name symbol, and it comes after
2735 the line number we have found so far, but before the
2736 offset, then we have probably not found the right line
2737 number. */
2738 if (q->symbol.value <= offset
2739 && ((q->symbol.value > low_line_vma
2740 && (line_file_name != NULL
2741 || *line_ptr != 0))
2742 || (q->symbol.value > low_func_vma
2743 && func != NULL)))
2745 const char *symname;
2747 symname = q->symbol.name;
2748 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2750 if (q->symbol.value > low_line_vma)
2752 *line_ptr = 0;
2753 line_file_name = NULL;
2755 if (q->symbol.value > low_func_vma)
2756 func = NULL;
2759 break;
2761 case N_SO:
2762 /* If this symbol is less than the offset, but greater than
2763 the line number we have found so far, then we have not
2764 found the right line number. */
2765 if (q->symbol.value <= offset)
2767 if (q->symbol.value > low_line_vma)
2769 *line_ptr = 0;
2770 line_file_name = NULL;
2772 if (q->symbol.value > low_func_vma)
2773 func = NULL;
2776 main_file_name = current_file_name = q->symbol.name;
2777 /* Look ahead to next symbol to check if that too is an N_SO. */
2778 p++;
2779 if (*p == NULL)
2780 break;
2781 q = (aout_symbol_type *) (*p);
2782 if (q->type != (int)N_SO)
2783 goto next;
2785 /* Found a second N_SO First is directory; second is filename. */
2786 directory_name = current_file_name;
2787 main_file_name = current_file_name = q->symbol.name;
2788 if (obj_textsec(abfd) != section)
2789 goto done;
2790 break;
2791 case N_SOL:
2792 current_file_name = q->symbol.name;
2793 break;
2795 case N_SLINE:
2797 case N_DSLINE:
2798 case N_BSLINE:
2799 /* We'll keep this if it resolves nearer than the one we have
2800 already. */
2801 if (q->symbol.value >= low_line_vma
2802 && q->symbol.value <= offset)
2804 *line_ptr = q->desc;
2805 low_line_vma = q->symbol.value;
2806 line_file_name = current_file_name;
2807 line_directory_name = directory_name;
2809 break;
2810 case N_FUN:
2812 /* We'll keep this if it is nearer than the one we have already */
2813 if (q->symbol.value >= low_func_vma &&
2814 q->symbol.value <= offset) {
2815 low_func_vma = q->symbol.value;
2816 func = (asymbol *)q;
2818 else if (q->symbol.value > offset)
2819 goto done;
2821 break;
2826 done:
2827 if (*line_ptr != 0)
2829 main_file_name = line_file_name;
2830 directory_name = line_directory_name;
2833 if (main_file_name == NULL
2834 || IS_ABSOLUTE_PATH (main_file_name)
2835 || directory_name == NULL)
2836 filelen = 0;
2837 else
2838 filelen = strlen (directory_name) + strlen (main_file_name);
2839 if (func == NULL)
2840 funclen = 0;
2841 else
2842 funclen = strlen (bfd_asymbol_name (func));
2844 if (adata (abfd).line_buf != NULL)
2845 free (adata (abfd).line_buf);
2846 if (filelen + funclen == 0)
2847 adata (abfd).line_buf = buf = NULL;
2848 else
2850 buf = (char *) bfd_malloc (filelen + funclen + 3);
2851 adata (abfd).line_buf = buf;
2852 if (buf == NULL)
2853 return false;
2856 if (main_file_name != NULL)
2858 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2859 *filename_ptr = main_file_name;
2860 else
2862 sprintf (buf, "%s%s", directory_name, main_file_name);
2863 *filename_ptr = buf;
2864 buf += filelen + 1;
2868 if (func)
2870 const char *function = func->name;
2871 char *p;
2873 /* The caller expects a symbol name. We actually have a
2874 function name, without the leading underscore. Put the
2875 underscore back in, so that the caller gets a symbol name. */
2876 if (bfd_get_symbol_leading_char (abfd) == '\0')
2877 strcpy (buf, function);
2878 else
2880 buf[0] = bfd_get_symbol_leading_char (abfd);
2881 strcpy (buf + 1, function);
2883 /* Have to remove : stuff */
2884 p = strchr (buf, ':');
2885 if (p != NULL)
2886 *p = '\0';
2887 *functionname_ptr = buf;
2890 return true;
2894 NAME(aout,sizeof_headers) (abfd, execable)
2895 bfd *abfd;
2896 boolean execable ATTRIBUTE_UNUSED;
2898 return adata(abfd).exec_bytes_size;
2901 /* Free all information we have cached for this BFD. We can always
2902 read it again later if we need it. */
2904 boolean
2905 NAME(aout,bfd_free_cached_info) (abfd)
2906 bfd *abfd;
2908 asection *o;
2910 if (bfd_get_format (abfd) != bfd_object
2911 || abfd->tdata.aout_data == NULL)
2912 return true;
2914 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2915 BFCI_FREE (obj_aout_symbols (abfd));
2916 #ifdef USE_MMAP
2917 obj_aout_external_syms (abfd) = 0;
2918 bfd_free_window (&obj_aout_sym_window (abfd));
2919 bfd_free_window (&obj_aout_string_window (abfd));
2920 obj_aout_external_strings (abfd) = 0;
2921 #else
2922 BFCI_FREE (obj_aout_external_syms (abfd));
2923 BFCI_FREE (obj_aout_external_strings (abfd));
2924 #endif
2925 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2926 BFCI_FREE (o->relocation);
2927 #undef BFCI_FREE
2929 return true;
2932 /* a.out link code. */
2934 static boolean aout_link_add_object_symbols
2935 PARAMS ((bfd *, struct bfd_link_info *));
2936 static boolean aout_link_check_archive_element
2937 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2938 static boolean aout_link_free_symbols PARAMS ((bfd *));
2939 static boolean aout_link_check_ar_symbols
2940 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2941 static boolean aout_link_add_symbols
2942 PARAMS ((bfd *, struct bfd_link_info *));
2944 /* Routine to create an entry in an a.out link hash table. */
2946 struct bfd_hash_entry *
2947 NAME(aout,link_hash_newfunc) (entry, table, string)
2948 struct bfd_hash_entry *entry;
2949 struct bfd_hash_table *table;
2950 const char *string;
2952 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2954 /* Allocate the structure if it has not already been allocated by a
2955 subclass. */
2956 if (ret == (struct aout_link_hash_entry *) NULL)
2957 ret = ((struct aout_link_hash_entry *)
2958 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2959 if (ret == (struct aout_link_hash_entry *) NULL)
2960 return (struct bfd_hash_entry *) ret;
2962 /* Call the allocation method of the superclass. */
2963 ret = ((struct aout_link_hash_entry *)
2964 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2965 table, string));
2966 if (ret)
2968 /* Set local fields. */
2969 ret->written = false;
2970 ret->indx = -1;
2973 return (struct bfd_hash_entry *) ret;
2976 /* Initialize an a.out link hash table. */
2978 boolean
2979 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2980 struct aout_link_hash_table *table;
2981 bfd *abfd;
2982 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2983 struct bfd_hash_table *,
2984 const char *));
2986 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2989 /* Create an a.out link hash table. */
2991 struct bfd_link_hash_table *
2992 NAME(aout,link_hash_table_create) (abfd)
2993 bfd *abfd;
2995 struct aout_link_hash_table *ret;
2997 ret = ((struct aout_link_hash_table *)
2998 bfd_alloc (abfd, sizeof (struct aout_link_hash_table)));
2999 if (ret == NULL)
3000 return (struct bfd_link_hash_table *) NULL;
3001 if (! NAME(aout,link_hash_table_init) (ret, abfd,
3002 NAME(aout,link_hash_newfunc)))
3004 free (ret);
3005 return (struct bfd_link_hash_table *) NULL;
3007 return &ret->root;
3010 /* Given an a.out BFD, add symbols to the global hash table as
3011 appropriate. */
3013 boolean
3014 NAME(aout,link_add_symbols) (abfd, info)
3015 bfd *abfd;
3016 struct bfd_link_info *info;
3018 switch (bfd_get_format (abfd))
3020 case bfd_object:
3021 return aout_link_add_object_symbols (abfd, info);
3022 case bfd_archive:
3023 return _bfd_generic_link_add_archive_symbols
3024 (abfd, info, aout_link_check_archive_element);
3025 default:
3026 bfd_set_error (bfd_error_wrong_format);
3027 return false;
3031 /* Add symbols from an a.out object file. */
3033 static boolean
3034 aout_link_add_object_symbols (abfd, info)
3035 bfd *abfd;
3036 struct bfd_link_info *info;
3038 if (! aout_get_external_symbols (abfd))
3039 return false;
3040 if (! aout_link_add_symbols (abfd, info))
3041 return false;
3042 if (! info->keep_memory)
3044 if (! aout_link_free_symbols (abfd))
3045 return false;
3047 return true;
3050 /* Check a single archive element to see if we need to include it in
3051 the link. *PNEEDED is set according to whether this element is
3052 needed in the link or not. This is called from
3053 _bfd_generic_link_add_archive_symbols. */
3055 static boolean
3056 aout_link_check_archive_element (abfd, info, pneeded)
3057 bfd *abfd;
3058 struct bfd_link_info *info;
3059 boolean *pneeded;
3061 if (! aout_get_external_symbols (abfd))
3062 return false;
3064 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3065 return false;
3067 if (*pneeded)
3069 if (! aout_link_add_symbols (abfd, info))
3070 return false;
3073 if (! info->keep_memory || ! *pneeded)
3075 if (! aout_link_free_symbols (abfd))
3076 return false;
3079 return true;
3082 /* Free up the internal symbols read from an a.out file. */
3084 static boolean
3085 aout_link_free_symbols (abfd)
3086 bfd *abfd;
3088 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
3090 #ifdef USE_MMAP
3091 bfd_free_window (&obj_aout_sym_window (abfd));
3092 #else
3093 free ((PTR) obj_aout_external_syms (abfd));
3094 #endif
3095 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
3097 if (obj_aout_external_strings (abfd) != (char *) NULL)
3099 #ifdef USE_MMAP
3100 bfd_free_window (&obj_aout_string_window (abfd));
3101 #else
3102 free ((PTR) obj_aout_external_strings (abfd));
3103 #endif
3104 obj_aout_external_strings (abfd) = (char *) NULL;
3106 return true;
3109 /* Look through the internal symbols to see if this object file should
3110 be included in the link. We should include this object file if it
3111 defines any symbols which are currently undefined. If this object
3112 file defines a common symbol, then we may adjust the size of the
3113 known symbol but we do not include the object file in the link
3114 (unless there is some other reason to include it). */
3116 static boolean
3117 aout_link_check_ar_symbols (abfd, info, pneeded)
3118 bfd *abfd;
3119 struct bfd_link_info *info;
3120 boolean *pneeded;
3122 register struct external_nlist *p;
3123 struct external_nlist *pend;
3124 char *strings;
3126 *pneeded = false;
3128 /* Look through all the symbols. */
3129 p = obj_aout_external_syms (abfd);
3130 pend = p + obj_aout_external_sym_count (abfd);
3131 strings = obj_aout_external_strings (abfd);
3132 for (; p < pend; p++)
3134 int type = bfd_h_get_8 (abfd, p->e_type);
3135 const char *name;
3136 struct bfd_link_hash_entry *h;
3138 /* Ignore symbols that are not externally visible. This is an
3139 optimization only, as we check the type more thoroughly
3140 below. */
3141 if (((type & N_EXT) == 0
3142 || (type & N_STAB) != 0
3143 || type == N_FN)
3144 && type != N_WEAKA
3145 && type != N_WEAKT
3146 && type != N_WEAKD
3147 && type != N_WEAKB)
3149 if (type == N_WARNING
3150 || type == N_INDR)
3151 ++p;
3152 continue;
3155 name = strings + GET_WORD (abfd, p->e_strx);
3156 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3158 /* We are only interested in symbols that are currently
3159 undefined or common. */
3160 if (h == (struct bfd_link_hash_entry *) NULL
3161 || (h->type != bfd_link_hash_undefined
3162 && h->type != bfd_link_hash_common))
3164 if (type == (N_INDR | N_EXT))
3165 ++p;
3166 continue;
3169 if (type == (N_TEXT | N_EXT)
3170 || type == (N_DATA | N_EXT)
3171 || type == (N_BSS | N_EXT)
3172 || type == (N_ABS | N_EXT)
3173 || type == (N_INDR | N_EXT))
3175 /* This object file defines this symbol. We must link it
3176 in. This is true regardless of whether the current
3177 definition of the symbol is undefined or common. If the
3178 current definition is common, we have a case in which we
3179 have already seen an object file including
3180 int a;
3181 and this object file from the archive includes
3182 int a = 5;
3183 In such a case we must include this object file.
3185 FIXME: The SunOS 4.1.3 linker will pull in the archive
3186 element if the symbol is defined in the .data section,
3187 but not if it is defined in the .text section. That
3188 seems a bit crazy to me, and I haven't implemented it.
3189 However, it might be correct. */
3190 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3191 return false;
3192 *pneeded = true;
3193 return true;
3196 if (type == (N_UNDF | N_EXT))
3198 bfd_vma value;
3200 value = GET_WORD (abfd, p->e_value);
3201 if (value != 0)
3203 /* This symbol is common in the object from the archive
3204 file. */
3205 if (h->type == bfd_link_hash_undefined)
3207 bfd *symbfd;
3208 unsigned int power;
3210 symbfd = h->u.undef.abfd;
3211 if (symbfd == (bfd *) NULL)
3213 /* This symbol was created as undefined from
3214 outside BFD. We assume that we should link
3215 in the object file. This is done for the -u
3216 option in the linker. */
3217 if (! (*info->callbacks->add_archive_element) (info,
3218 abfd,
3219 name))
3220 return false;
3221 *pneeded = true;
3222 return true;
3224 /* Turn the current link symbol into a common
3225 symbol. It is already on the undefs list. */
3226 h->type = bfd_link_hash_common;
3227 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3228 bfd_hash_allocate (&info->hash->table,
3229 sizeof (struct bfd_link_hash_common_entry)));
3230 if (h->u.c.p == NULL)
3231 return false;
3233 h->u.c.size = value;
3235 /* FIXME: This isn't quite right. The maximum
3236 alignment of a common symbol should be set by the
3237 architecture of the output file, not of the input
3238 file. */
3239 power = bfd_log2 (value);
3240 if (power > bfd_get_arch_info (abfd)->section_align_power)
3241 power = bfd_get_arch_info (abfd)->section_align_power;
3242 h->u.c.p->alignment_power = power;
3244 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3245 "COMMON");
3247 else
3249 /* Adjust the size of the common symbol if
3250 necessary. */
3251 if (value > h->u.c.size)
3252 h->u.c.size = value;
3257 if (type == N_WEAKA
3258 || type == N_WEAKT
3259 || type == N_WEAKD
3260 || type == N_WEAKB)
3262 /* This symbol is weak but defined. We must pull it in if
3263 the current link symbol is undefined, but we don't want
3264 it if the current link symbol is common. */
3265 if (h->type == bfd_link_hash_undefined)
3267 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3268 return false;
3269 *pneeded = true;
3270 return true;
3275 /* We do not need this object file. */
3276 return true;
3279 /* Add all symbols from an object file to the hash table. */
3281 static boolean
3282 aout_link_add_symbols (abfd, info)
3283 bfd *abfd;
3284 struct bfd_link_info *info;
3286 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3287 const char *, flagword, asection *,
3288 bfd_vma, const char *, boolean,
3289 boolean,
3290 struct bfd_link_hash_entry **));
3291 struct external_nlist *syms;
3292 bfd_size_type sym_count;
3293 char *strings;
3294 boolean copy;
3295 struct aout_link_hash_entry **sym_hash;
3296 register struct external_nlist *p;
3297 struct external_nlist *pend;
3299 syms = obj_aout_external_syms (abfd);
3300 sym_count = obj_aout_external_sym_count (abfd);
3301 strings = obj_aout_external_strings (abfd);
3302 if (info->keep_memory)
3303 copy = false;
3304 else
3305 copy = true;
3307 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3309 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3310 (abfd, info, &syms, &sym_count, &strings)))
3311 return false;
3314 /* We keep a list of the linker hash table entries that correspond
3315 to particular symbols. We could just look them up in the hash
3316 table, but keeping the list is more efficient. Perhaps this
3317 should be conditional on info->keep_memory. */
3318 sym_hash = ((struct aout_link_hash_entry **)
3319 bfd_alloc (abfd,
3320 ((size_t) sym_count
3321 * sizeof (struct aout_link_hash_entry *))));
3322 if (sym_hash == NULL && sym_count != 0)
3323 return false;
3324 obj_aout_sym_hashes (abfd) = sym_hash;
3326 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3327 if (add_one_symbol == NULL)
3328 add_one_symbol = _bfd_generic_link_add_one_symbol;
3330 p = syms;
3331 pend = p + sym_count;
3332 for (; p < pend; p++, sym_hash++)
3334 int type;
3335 const char *name;
3336 bfd_vma value;
3337 asection *section;
3338 flagword flags;
3339 const char *string;
3341 *sym_hash = NULL;
3343 type = bfd_h_get_8 (abfd, p->e_type);
3345 /* Ignore debugging symbols. */
3346 if ((type & N_STAB) != 0)
3347 continue;
3349 name = strings + GET_WORD (abfd, p->e_strx);
3350 value = GET_WORD (abfd, p->e_value);
3351 flags = BSF_GLOBAL;
3352 string = NULL;
3353 switch (type)
3355 default:
3356 abort ();
3358 case N_UNDF:
3359 case N_ABS:
3360 case N_TEXT:
3361 case N_DATA:
3362 case N_BSS:
3363 case N_FN_SEQ:
3364 case N_COMM:
3365 case N_SETV:
3366 case N_FN:
3367 /* Ignore symbols that are not externally visible. */
3368 continue;
3369 case N_INDR:
3370 /* Ignore local indirect symbol. */
3371 ++p;
3372 ++sym_hash;
3373 continue;
3375 case N_UNDF | N_EXT:
3376 if (value == 0)
3378 section = bfd_und_section_ptr;
3379 flags = 0;
3381 else
3382 section = bfd_com_section_ptr;
3383 break;
3384 case N_ABS | N_EXT:
3385 section = bfd_abs_section_ptr;
3386 break;
3387 case N_TEXT | N_EXT:
3388 section = obj_textsec (abfd);
3389 value -= bfd_get_section_vma (abfd, section);
3390 break;
3391 case N_DATA | N_EXT:
3392 case N_SETV | N_EXT:
3393 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3394 translate_from_native_sym_flags. */
3395 section = obj_datasec (abfd);
3396 value -= bfd_get_section_vma (abfd, section);
3397 break;
3398 case N_BSS | N_EXT:
3399 section = obj_bsssec (abfd);
3400 value -= bfd_get_section_vma (abfd, section);
3401 break;
3402 case N_INDR | N_EXT:
3403 /* An indirect symbol. The next symbol is the symbol
3404 which this one really is. */
3405 BFD_ASSERT (p + 1 < pend);
3406 ++p;
3407 string = strings + GET_WORD (abfd, p->e_strx);
3408 section = bfd_ind_section_ptr;
3409 flags |= BSF_INDIRECT;
3410 break;
3411 case N_COMM | N_EXT:
3412 section = bfd_com_section_ptr;
3413 break;
3414 case N_SETA: case N_SETA | N_EXT:
3415 section = bfd_abs_section_ptr;
3416 flags |= BSF_CONSTRUCTOR;
3417 break;
3418 case N_SETT: case N_SETT | N_EXT:
3419 section = obj_textsec (abfd);
3420 flags |= BSF_CONSTRUCTOR;
3421 value -= bfd_get_section_vma (abfd, section);
3422 break;
3423 case N_SETD: case N_SETD | N_EXT:
3424 section = obj_datasec (abfd);
3425 flags |= BSF_CONSTRUCTOR;
3426 value -= bfd_get_section_vma (abfd, section);
3427 break;
3428 case N_SETB: case N_SETB | N_EXT:
3429 section = obj_bsssec (abfd);
3430 flags |= BSF_CONSTRUCTOR;
3431 value -= bfd_get_section_vma (abfd, section);
3432 break;
3433 case N_WARNING:
3434 /* A warning symbol. The next symbol is the one to warn
3435 about. */
3436 BFD_ASSERT (p + 1 < pend);
3437 ++p;
3438 string = name;
3439 name = strings + GET_WORD (abfd, p->e_strx);
3440 section = bfd_und_section_ptr;
3441 flags |= BSF_WARNING;
3442 break;
3443 case N_WEAKU:
3444 section = bfd_und_section_ptr;
3445 flags = BSF_WEAK;
3446 break;
3447 case N_WEAKA:
3448 section = bfd_abs_section_ptr;
3449 flags = BSF_WEAK;
3450 break;
3451 case N_WEAKT:
3452 section = obj_textsec (abfd);
3453 value -= bfd_get_section_vma (abfd, section);
3454 flags = BSF_WEAK;
3455 break;
3456 case N_WEAKD:
3457 section = obj_datasec (abfd);
3458 value -= bfd_get_section_vma (abfd, section);
3459 flags = BSF_WEAK;
3460 break;
3461 case N_WEAKB:
3462 section = obj_bsssec (abfd);
3463 value -= bfd_get_section_vma (abfd, section);
3464 flags = BSF_WEAK;
3465 break;
3468 if (! ((*add_one_symbol)
3469 (info, abfd, name, flags, section, value, string, copy, false,
3470 (struct bfd_link_hash_entry **) sym_hash)))
3471 return false;
3473 /* Restrict the maximum alignment of a common symbol based on
3474 the architecture, since a.out has no way to represent
3475 alignment requirements of a section in a .o file. FIXME:
3476 This isn't quite right: it should use the architecture of the
3477 output file, not the input files. */
3478 if ((*sym_hash)->root.type == bfd_link_hash_common
3479 && ((*sym_hash)->root.u.c.p->alignment_power >
3480 bfd_get_arch_info (abfd)->section_align_power))
3481 (*sym_hash)->root.u.c.p->alignment_power =
3482 bfd_get_arch_info (abfd)->section_align_power;
3484 /* If this is a set symbol, and we are not building sets, then
3485 it is possible for the hash entry to not have been set. In
3486 such a case, treat the symbol as not globally defined. */
3487 if ((*sym_hash)->root.type == bfd_link_hash_new)
3489 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3490 *sym_hash = NULL;
3493 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3494 ++sym_hash;
3497 return true;
3500 /* A hash table used for header files with N_BINCL entries. */
3502 struct aout_link_includes_table
3504 struct bfd_hash_table root;
3507 /* A linked list of totals that we have found for a particular header
3508 file. */
3510 struct aout_link_includes_totals
3512 struct aout_link_includes_totals *next;
3513 bfd_vma total;
3516 /* An entry in the header file hash table. */
3518 struct aout_link_includes_entry
3520 struct bfd_hash_entry root;
3521 /* List of totals we have found for this file. */
3522 struct aout_link_includes_totals *totals;
3525 /* Look up an entry in an the header file hash table. */
3527 #define aout_link_includes_lookup(table, string, create, copy) \
3528 ((struct aout_link_includes_entry *) \
3529 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3531 /* During the final link step we need to pass around a bunch of
3532 information, so we do it in an instance of this structure. */
3534 struct aout_final_link_info
3536 /* General link information. */
3537 struct bfd_link_info *info;
3538 /* Output bfd. */
3539 bfd *output_bfd;
3540 /* Reloc file positions. */
3541 file_ptr treloff, dreloff;
3542 /* File position of symbols. */
3543 file_ptr symoff;
3544 /* String table. */
3545 struct bfd_strtab_hash *strtab;
3546 /* Header file hash table. */
3547 struct aout_link_includes_table includes;
3548 /* A buffer large enough to hold the contents of any section. */
3549 bfd_byte *contents;
3550 /* A buffer large enough to hold the relocs of any section. */
3551 PTR relocs;
3552 /* A buffer large enough to hold the symbol map of any input BFD. */
3553 int *symbol_map;
3554 /* A buffer large enough to hold output symbols of any input BFD. */
3555 struct external_nlist *output_syms;
3558 static struct bfd_hash_entry *aout_link_includes_newfunc
3559 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
3560 static boolean aout_link_input_bfd
3561 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3562 static boolean aout_link_write_symbols
3563 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3564 static boolean aout_link_write_other_symbol
3565 PARAMS ((struct aout_link_hash_entry *, PTR));
3566 static boolean aout_link_input_section
3567 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3568 asection *input_section, file_ptr *reloff_ptr,
3569 bfd_size_type rel_size));
3570 static boolean aout_link_input_section_std
3571 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3572 asection *input_section, struct reloc_std_external *,
3573 bfd_size_type rel_size, bfd_byte *contents));
3574 static boolean aout_link_input_section_ext
3575 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3576 asection *input_section, struct reloc_ext_external *,
3577 bfd_size_type rel_size, bfd_byte *contents));
3578 static INLINE asection *aout_reloc_index_to_section
3579 PARAMS ((bfd *, int));
3580 static boolean aout_link_reloc_link_order
3581 PARAMS ((struct aout_final_link_info *, asection *,
3582 struct bfd_link_order *));
3584 /* The function to create a new entry in the header file hash table. */
3586 static struct bfd_hash_entry *
3587 aout_link_includes_newfunc (entry, table, string)
3588 struct bfd_hash_entry *entry;
3589 struct bfd_hash_table *table;
3590 const char *string;
3592 struct aout_link_includes_entry *ret =
3593 (struct aout_link_includes_entry *) entry;
3595 /* Allocate the structure if it has not already been allocated by a
3596 subclass. */
3597 if (ret == (struct aout_link_includes_entry *) NULL)
3598 ret = ((struct aout_link_includes_entry *)
3599 bfd_hash_allocate (table,
3600 sizeof (struct aout_link_includes_entry)));
3601 if (ret == (struct aout_link_includes_entry *) NULL)
3602 return (struct bfd_hash_entry *) ret;
3604 /* Call the allocation method of the superclass. */
3605 ret = ((struct aout_link_includes_entry *)
3606 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3607 if (ret)
3609 /* Set local fields. */
3610 ret->totals = NULL;
3613 return (struct bfd_hash_entry *) ret;
3616 /* Do the final link step. This is called on the output BFD. The
3617 INFO structure should point to a list of BFDs linked through the
3618 link_next field which can be used to find each BFD which takes part
3619 in the output. Also, each section in ABFD should point to a list
3620 of bfd_link_order structures which list all the input sections for
3621 the output section. */
3623 boolean
3624 NAME(aout,final_link) (abfd, info, callback)
3625 bfd *abfd;
3626 struct bfd_link_info *info;
3627 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3629 struct aout_final_link_info aout_info;
3630 boolean includes_hash_initialized = false;
3631 register bfd *sub;
3632 bfd_size_type trsize, drsize;
3633 size_t max_contents_size;
3634 size_t max_relocs_size;
3635 size_t max_sym_count;
3636 bfd_size_type text_size;
3637 file_ptr text_end;
3638 register struct bfd_link_order *p;
3639 asection *o;
3640 boolean have_link_order_relocs;
3642 if (info->shared)
3643 abfd->flags |= DYNAMIC;
3645 aout_info.info = info;
3646 aout_info.output_bfd = abfd;
3647 aout_info.contents = NULL;
3648 aout_info.relocs = NULL;
3649 aout_info.symbol_map = NULL;
3650 aout_info.output_syms = NULL;
3652 if (! bfd_hash_table_init_n (&aout_info.includes.root,
3653 aout_link_includes_newfunc,
3654 251))
3655 goto error_return;
3656 includes_hash_initialized = true;
3658 /* Figure out the largest section size. Also, if generating
3659 relocateable output, count the relocs. */
3660 trsize = 0;
3661 drsize = 0;
3662 max_contents_size = 0;
3663 max_relocs_size = 0;
3664 max_sym_count = 0;
3665 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3667 size_t sz;
3669 if (info->relocateable)
3671 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3673 trsize += exec_hdr (sub)->a_trsize;
3674 drsize += exec_hdr (sub)->a_drsize;
3676 else
3678 /* FIXME: We need to identify the .text and .data sections
3679 and call get_reloc_upper_bound and canonicalize_reloc to
3680 work out the number of relocs needed, and then multiply
3681 by the reloc size. */
3682 (*_bfd_error_handler)
3683 (_("%s: relocateable link from %s to %s not supported"),
3684 bfd_get_filename (abfd),
3685 sub->xvec->name, abfd->xvec->name);
3686 bfd_set_error (bfd_error_invalid_operation);
3687 goto error_return;
3691 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3693 sz = bfd_section_size (sub, obj_textsec (sub));
3694 if (sz > max_contents_size)
3695 max_contents_size = sz;
3696 sz = bfd_section_size (sub, obj_datasec (sub));
3697 if (sz > max_contents_size)
3698 max_contents_size = sz;
3700 sz = exec_hdr (sub)->a_trsize;
3701 if (sz > max_relocs_size)
3702 max_relocs_size = sz;
3703 sz = exec_hdr (sub)->a_drsize;
3704 if (sz > max_relocs_size)
3705 max_relocs_size = sz;
3707 sz = obj_aout_external_sym_count (sub);
3708 if (sz > max_sym_count)
3709 max_sym_count = sz;
3713 if (info->relocateable)
3715 if (obj_textsec (abfd) != (asection *) NULL)
3716 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3717 ->link_order_head)
3718 * obj_reloc_entry_size (abfd));
3719 if (obj_datasec (abfd) != (asection *) NULL)
3720 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3721 ->link_order_head)
3722 * obj_reloc_entry_size (abfd));
3725 exec_hdr (abfd)->a_trsize = trsize;
3726 exec_hdr (abfd)->a_drsize = drsize;
3728 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3730 /* Adjust the section sizes and vmas according to the magic number.
3731 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3732 filepos for each section. */
3733 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3734 goto error_return;
3736 /* The relocation and symbol file positions differ among a.out
3737 targets. We are passed a callback routine from the backend
3738 specific code to handle this.
3739 FIXME: At this point we do not know how much space the symbol
3740 table will require. This will not work for any (nonstandard)
3741 a.out target that needs to know the symbol table size before it
3742 can compute the relocation file positions. This may or may not
3743 be the case for the hp300hpux target, for example. */
3744 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3745 &aout_info.symoff);
3746 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3747 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3748 obj_sym_filepos (abfd) = aout_info.symoff;
3750 /* We keep a count of the symbols as we output them. */
3751 obj_aout_external_sym_count (abfd) = 0;
3753 /* We accumulate the string table as we write out the symbols. */
3754 aout_info.strtab = _bfd_stringtab_init ();
3755 if (aout_info.strtab == NULL)
3756 goto error_return;
3758 /* Allocate buffers to hold section contents and relocs. */
3759 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3760 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3761 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3762 aout_info.output_syms = ((struct external_nlist *)
3763 bfd_malloc ((max_sym_count + 1)
3764 * sizeof (struct external_nlist)));
3765 if ((aout_info.contents == NULL && max_contents_size != 0)
3766 || (aout_info.relocs == NULL && max_relocs_size != 0)
3767 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3768 || aout_info.output_syms == NULL)
3769 goto error_return;
3771 /* If we have a symbol named __DYNAMIC, force it out now. This is
3772 required by SunOS. Doing this here rather than in sunos.c is a
3773 hack, but it's easier than exporting everything which would be
3774 needed. */
3776 struct aout_link_hash_entry *h;
3778 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3779 false, false, false);
3780 if (h != NULL)
3781 aout_link_write_other_symbol (h, &aout_info);
3784 /* The most time efficient way to do the link would be to read all
3785 the input object files into memory and then sort out the
3786 information into the output file. Unfortunately, that will
3787 probably use too much memory. Another method would be to step
3788 through everything that composes the text section and write it
3789 out, and then everything that composes the data section and write
3790 it out, and then write out the relocs, and then write out the
3791 symbols. Unfortunately, that requires reading stuff from each
3792 input file several times, and we will not be able to keep all the
3793 input files open simultaneously, and reopening them will be slow.
3795 What we do is basically process one input file at a time. We do
3796 everything we need to do with an input file once--copy over the
3797 section contents, handle the relocation information, and write
3798 out the symbols--and then we throw away the information we read
3799 from it. This approach requires a lot of lseeks of the output
3800 file, which is unfortunate but still faster than reopening a lot
3801 of files.
3803 We use the output_has_begun field of the input BFDs to see
3804 whether we have already handled it. */
3805 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3806 sub->output_has_begun = false;
3808 /* Mark all sections which are to be included in the link. This
3809 will normally be every section. We need to do this so that we
3810 can identify any sections which the linker has decided to not
3811 include. */
3812 for (o = abfd->sections; o != NULL; o = o->next)
3814 for (p = o->link_order_head; p != NULL; p = p->next)
3816 if (p->type == bfd_indirect_link_order)
3817 p->u.indirect.section->linker_mark = true;
3821 have_link_order_relocs = false;
3822 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3824 for (p = o->link_order_head;
3825 p != (struct bfd_link_order *) NULL;
3826 p = p->next)
3828 if (p->type == bfd_indirect_link_order
3829 && (bfd_get_flavour (p->u.indirect.section->owner)
3830 == bfd_target_aout_flavour))
3832 bfd *input_bfd;
3834 input_bfd = p->u.indirect.section->owner;
3835 if (! input_bfd->output_has_begun)
3837 if (! aout_link_input_bfd (&aout_info, input_bfd))
3838 goto error_return;
3839 input_bfd->output_has_begun = true;
3842 else if (p->type == bfd_section_reloc_link_order
3843 || p->type == bfd_symbol_reloc_link_order)
3845 /* These are handled below. */
3846 have_link_order_relocs = true;
3848 else
3850 if (! _bfd_default_link_order (abfd, info, o, p))
3851 goto error_return;
3856 /* Write out any symbols that we have not already written out. */
3857 aout_link_hash_traverse (aout_hash_table (info),
3858 aout_link_write_other_symbol,
3859 (PTR) &aout_info);
3861 /* Now handle any relocs we were asked to create by the linker.
3862 These did not come from any input file. We must do these after
3863 we have written out all the symbols, so that we know the symbol
3864 indices to use. */
3865 if (have_link_order_relocs)
3867 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3869 for (p = o->link_order_head;
3870 p != (struct bfd_link_order *) NULL;
3871 p = p->next)
3873 if (p->type == bfd_section_reloc_link_order
3874 || p->type == bfd_symbol_reloc_link_order)
3876 if (! aout_link_reloc_link_order (&aout_info, o, p))
3877 goto error_return;
3883 if (aout_info.contents != NULL)
3885 free (aout_info.contents);
3886 aout_info.contents = NULL;
3888 if (aout_info.relocs != NULL)
3890 free (aout_info.relocs);
3891 aout_info.relocs = NULL;
3893 if (aout_info.symbol_map != NULL)
3895 free (aout_info.symbol_map);
3896 aout_info.symbol_map = NULL;
3898 if (aout_info.output_syms != NULL)
3900 free (aout_info.output_syms);
3901 aout_info.output_syms = NULL;
3903 if (includes_hash_initialized)
3905 bfd_hash_table_free (&aout_info.includes.root);
3906 includes_hash_initialized = false;
3909 /* Finish up any dynamic linking we may be doing. */
3910 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3912 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3913 goto error_return;
3916 /* Update the header information. */
3917 abfd->symcount = obj_aout_external_sym_count (abfd);
3918 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3919 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3920 obj_textsec (abfd)->reloc_count =
3921 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3922 obj_datasec (abfd)->reloc_count =
3923 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3925 /* Write out the string table, unless there are no symbols. */
3926 if (abfd->symcount > 0)
3928 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
3929 || ! emit_stringtab (abfd, aout_info.strtab))
3930 goto error_return;
3932 else if (obj_textsec (abfd)->reloc_count == 0
3933 && obj_datasec (abfd)->reloc_count == 0)
3935 bfd_byte b;
3937 b = 0;
3938 if (bfd_seek (abfd,
3939 (obj_datasec (abfd)->filepos
3940 + exec_hdr (abfd)->a_data
3941 - 1),
3942 SEEK_SET) != 0
3943 || bfd_write (&b, 1, 1, abfd) != 1)
3944 goto error_return;
3947 return true;
3949 error_return:
3950 if (aout_info.contents != NULL)
3951 free (aout_info.contents);
3952 if (aout_info.relocs != NULL)
3953 free (aout_info.relocs);
3954 if (aout_info.symbol_map != NULL)
3955 free (aout_info.symbol_map);
3956 if (aout_info.output_syms != NULL)
3957 free (aout_info.output_syms);
3958 if (includes_hash_initialized)
3959 bfd_hash_table_free (&aout_info.includes.root);
3960 return false;
3963 /* Link an a.out input BFD into the output file. */
3965 static boolean
3966 aout_link_input_bfd (finfo, input_bfd)
3967 struct aout_final_link_info *finfo;
3968 bfd *input_bfd;
3970 bfd_size_type sym_count;
3972 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3974 /* If this is a dynamic object, it may need special handling. */
3975 if ((input_bfd->flags & DYNAMIC) != 0
3976 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3978 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3979 (finfo->info, input_bfd));
3982 /* Get the symbols. We probably have them already, unless
3983 finfo->info->keep_memory is false. */
3984 if (! aout_get_external_symbols (input_bfd))
3985 return false;
3987 sym_count = obj_aout_external_sym_count (input_bfd);
3989 /* Write out the symbols and get a map of the new indices. The map
3990 is placed into finfo->symbol_map. */
3991 if (! aout_link_write_symbols (finfo, input_bfd))
3992 return false;
3994 /* Relocate and write out the sections. These functions use the
3995 symbol map created by aout_link_write_symbols. The linker_mark
3996 field will be set if these sections are to be included in the
3997 link, which will normally be the case. */
3998 if (obj_textsec (input_bfd)->linker_mark)
4000 if (! aout_link_input_section (finfo, input_bfd,
4001 obj_textsec (input_bfd),
4002 &finfo->treloff,
4003 exec_hdr (input_bfd)->a_trsize))
4004 return false;
4006 if (obj_datasec (input_bfd)->linker_mark)
4008 if (! aout_link_input_section (finfo, input_bfd,
4009 obj_datasec (input_bfd),
4010 &finfo->dreloff,
4011 exec_hdr (input_bfd)->a_drsize))
4012 return false;
4015 /* If we are not keeping memory, we don't need the symbols any
4016 longer. We still need them if we are keeping memory, because the
4017 strings in the hash table point into them. */
4018 if (! finfo->info->keep_memory)
4020 if (! aout_link_free_symbols (input_bfd))
4021 return false;
4024 return true;
4027 /* Adjust and write out the symbols for an a.out file. Set the new
4028 symbol indices into a symbol_map. */
4030 static boolean
4031 aout_link_write_symbols (finfo, input_bfd)
4032 struct aout_final_link_info *finfo;
4033 bfd *input_bfd;
4035 bfd *output_bfd;
4036 bfd_size_type sym_count;
4037 char *strings;
4038 enum bfd_link_strip strip;
4039 enum bfd_link_discard discard;
4040 struct external_nlist *outsym;
4041 bfd_size_type strtab_index;
4042 register struct external_nlist *sym;
4043 struct external_nlist *sym_end;
4044 struct aout_link_hash_entry **sym_hash;
4045 int *symbol_map;
4046 boolean pass;
4047 boolean skip_next;
4049 output_bfd = finfo->output_bfd;
4050 sym_count = obj_aout_external_sym_count (input_bfd);
4051 strings = obj_aout_external_strings (input_bfd);
4052 strip = finfo->info->strip;
4053 discard = finfo->info->discard;
4054 outsym = finfo->output_syms;
4056 /* First write out a symbol for this object file, unless we are
4057 discarding such symbols. */
4058 if (strip != strip_all
4059 && (strip != strip_some
4060 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4061 false, false) != NULL)
4062 && discard != discard_all)
4064 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
4065 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
4066 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
4067 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4068 input_bfd->filename, false);
4069 if (strtab_index == (bfd_size_type) -1)
4070 return false;
4071 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4072 PUT_WORD (output_bfd,
4073 (bfd_get_section_vma (output_bfd,
4074 obj_textsec (input_bfd)->output_section)
4075 + obj_textsec (input_bfd)->output_offset),
4076 outsym->e_value);
4077 ++obj_aout_external_sym_count (output_bfd);
4078 ++outsym;
4081 pass = false;
4082 skip_next = false;
4083 sym = obj_aout_external_syms (input_bfd);
4084 sym_end = sym + sym_count;
4085 sym_hash = obj_aout_sym_hashes (input_bfd);
4086 symbol_map = finfo->symbol_map;
4087 memset (symbol_map, 0, sym_count * sizeof *symbol_map);
4088 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4090 const char *name;
4091 int type;
4092 struct aout_link_hash_entry *h;
4093 boolean skip;
4094 asection *symsec;
4095 bfd_vma val = 0;
4096 boolean copy;
4098 /* We set *symbol_map to 0 above for all symbols. If it has
4099 already been set to -1 for this symbol, it means that we are
4100 discarding it because it appears in a duplicate header file.
4101 See the N_BINCL code below. */
4102 if (*symbol_map == -1)
4103 continue;
4105 /* Initialize *symbol_map to -1, which means that the symbol was
4106 not copied into the output file. We will change it later if
4107 we do copy the symbol over. */
4108 *symbol_map = -1;
4110 type = bfd_h_get_8 (input_bfd, sym->e_type);
4111 name = strings + GET_WORD (input_bfd, sym->e_strx);
4113 h = NULL;
4115 if (pass)
4117 /* Pass this symbol through. It is the target of an
4118 indirect or warning symbol. */
4119 val = GET_WORD (input_bfd, sym->e_value);
4120 pass = false;
4122 else if (skip_next)
4124 /* Skip this symbol, which is the target of an indirect
4125 symbol that we have changed to no longer be an indirect
4126 symbol. */
4127 skip_next = false;
4128 continue;
4130 else
4132 struct aout_link_hash_entry *hresolve;
4134 /* We have saved the hash table entry for this symbol, if
4135 there is one. Note that we could just look it up again
4136 in the hash table, provided we first check that it is an
4137 external symbol. */
4138 h = *sym_hash;
4140 /* Use the name from the hash table, in case the symbol was
4141 wrapped. */
4142 if (h != NULL)
4143 name = h->root.root.string;
4145 /* If this is an indirect or warning symbol, then change
4146 hresolve to the base symbol. We also change *sym_hash so
4147 that the relocation routines relocate against the real
4148 symbol. */
4149 hresolve = h;
4150 if (h != (struct aout_link_hash_entry *) NULL
4151 && (h->root.type == bfd_link_hash_indirect
4152 || h->root.type == bfd_link_hash_warning))
4154 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4155 while (hresolve->root.type == bfd_link_hash_indirect
4156 || hresolve->root.type == bfd_link_hash_warning)
4157 hresolve = ((struct aout_link_hash_entry *)
4158 hresolve->root.u.i.link);
4159 *sym_hash = hresolve;
4162 /* If the symbol has already been written out, skip it. */
4163 if (h != (struct aout_link_hash_entry *) NULL
4164 && h->root.type != bfd_link_hash_warning
4165 && h->written)
4167 if ((type & N_TYPE) == N_INDR
4168 || type == N_WARNING)
4169 skip_next = true;
4170 *symbol_map = h->indx;
4171 continue;
4174 /* See if we are stripping this symbol. */
4175 skip = false;
4176 switch (strip)
4178 case strip_none:
4179 break;
4180 case strip_debugger:
4181 if ((type & N_STAB) != 0)
4182 skip = true;
4183 break;
4184 case strip_some:
4185 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
4186 == NULL)
4187 skip = true;
4188 break;
4189 case strip_all:
4190 skip = true;
4191 break;
4193 if (skip)
4195 if (h != (struct aout_link_hash_entry *) NULL)
4196 h->written = true;
4197 continue;
4200 /* Get the value of the symbol. */
4201 if ((type & N_TYPE) == N_TEXT
4202 || type == N_WEAKT)
4203 symsec = obj_textsec (input_bfd);
4204 else if ((type & N_TYPE) == N_DATA
4205 || type == N_WEAKD)
4206 symsec = obj_datasec (input_bfd);
4207 else if ((type & N_TYPE) == N_BSS
4208 || type == N_WEAKB)
4209 symsec = obj_bsssec (input_bfd);
4210 else if ((type & N_TYPE) == N_ABS
4211 || type == N_WEAKA)
4212 symsec = bfd_abs_section_ptr;
4213 else if (((type & N_TYPE) == N_INDR
4214 && (hresolve == (struct aout_link_hash_entry *) NULL
4215 || (hresolve->root.type != bfd_link_hash_defined
4216 && hresolve->root.type != bfd_link_hash_defweak
4217 && hresolve->root.type != bfd_link_hash_common)))
4218 || type == N_WARNING)
4220 /* Pass the next symbol through unchanged. The
4221 condition above for indirect symbols is so that if
4222 the indirect symbol was defined, we output it with
4223 the correct definition so the debugger will
4224 understand it. */
4225 pass = true;
4226 val = GET_WORD (input_bfd, sym->e_value);
4227 symsec = NULL;
4229 else if ((type & N_STAB) != 0)
4231 val = GET_WORD (input_bfd, sym->e_value);
4232 symsec = NULL;
4234 else
4236 /* If we get here with an indirect symbol, it means that
4237 we are outputting it with a real definition. In such
4238 a case we do not want to output the next symbol,
4239 which is the target of the indirection. */
4240 if ((type & N_TYPE) == N_INDR)
4241 skip_next = true;
4243 symsec = NULL;
4245 /* We need to get the value from the hash table. We use
4246 hresolve so that if we have defined an indirect
4247 symbol we output the final definition. */
4248 if (h == (struct aout_link_hash_entry *) NULL)
4250 switch (type & N_TYPE)
4252 case N_SETT:
4253 symsec = obj_textsec (input_bfd);
4254 break;
4255 case N_SETD:
4256 symsec = obj_datasec (input_bfd);
4257 break;
4258 case N_SETB:
4259 symsec = obj_bsssec (input_bfd);
4260 break;
4261 case N_SETA:
4262 symsec = bfd_abs_section_ptr;
4263 break;
4264 default:
4265 val = 0;
4266 break;
4269 else if (hresolve->root.type == bfd_link_hash_defined
4270 || hresolve->root.type == bfd_link_hash_defweak)
4272 asection *input_section;
4273 asection *output_section;
4275 /* This case usually means a common symbol which was
4276 turned into a defined symbol. */
4277 input_section = hresolve->root.u.def.section;
4278 output_section = input_section->output_section;
4279 BFD_ASSERT (bfd_is_abs_section (output_section)
4280 || output_section->owner == output_bfd);
4281 val = (hresolve->root.u.def.value
4282 + bfd_get_section_vma (output_bfd, output_section)
4283 + input_section->output_offset);
4285 /* Get the correct type based on the section. If
4286 this is a constructed set, force it to be
4287 globally visible. */
4288 if (type == N_SETT
4289 || type == N_SETD
4290 || type == N_SETB
4291 || type == N_SETA)
4292 type |= N_EXT;
4294 type &=~ N_TYPE;
4296 if (output_section == obj_textsec (output_bfd))
4297 type |= (hresolve->root.type == bfd_link_hash_defined
4298 ? N_TEXT
4299 : N_WEAKT);
4300 else if (output_section == obj_datasec (output_bfd))
4301 type |= (hresolve->root.type == bfd_link_hash_defined
4302 ? N_DATA
4303 : N_WEAKD);
4304 else if (output_section == obj_bsssec (output_bfd))
4305 type |= (hresolve->root.type == bfd_link_hash_defined
4306 ? N_BSS
4307 : N_WEAKB);
4308 else
4309 type |= (hresolve->root.type == bfd_link_hash_defined
4310 ? N_ABS
4311 : N_WEAKA);
4313 else if (hresolve->root.type == bfd_link_hash_common)
4314 val = hresolve->root.u.c.size;
4315 else if (hresolve->root.type == bfd_link_hash_undefweak)
4317 val = 0;
4318 type = N_WEAKU;
4320 else
4321 val = 0;
4323 if (symsec != (asection *) NULL)
4324 val = (symsec->output_section->vma
4325 + symsec->output_offset
4326 + (GET_WORD (input_bfd, sym->e_value)
4327 - symsec->vma));
4329 /* If this is a global symbol set the written flag, and if
4330 it is a local symbol see if we should discard it. */
4331 if (h != (struct aout_link_hash_entry *) NULL)
4333 h->written = true;
4334 h->indx = obj_aout_external_sym_count (output_bfd);
4336 else if ((type & N_TYPE) != N_SETT
4337 && (type & N_TYPE) != N_SETD
4338 && (type & N_TYPE) != N_SETB
4339 && (type & N_TYPE) != N_SETA)
4341 switch (discard)
4343 case discard_none:
4344 break;
4345 case discard_l:
4346 if ((type & N_STAB) == 0
4347 && bfd_is_local_label_name (input_bfd, name))
4348 skip = true;
4349 break;
4350 case discard_all:
4351 skip = true;
4352 break;
4354 if (skip)
4356 pass = false;
4357 continue;
4361 /* An N_BINCL symbol indicates the start of the stabs
4362 entries for a header file. We need to scan ahead to the
4363 next N_EINCL symbol, ignoring nesting, adding up all the
4364 characters in the symbol names, not including the file
4365 numbers in types (the first number after an open
4366 parenthesis). */
4367 if (type == N_BINCL)
4369 struct external_nlist *incl_sym;
4370 int nest;
4371 struct aout_link_includes_entry *incl_entry;
4372 struct aout_link_includes_totals *t;
4374 val = 0;
4375 nest = 0;
4376 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
4378 int incl_type;
4380 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4381 if (incl_type == N_EINCL)
4383 if (nest == 0)
4384 break;
4385 --nest;
4387 else if (incl_type == N_BINCL)
4388 ++nest;
4389 else if (nest == 0)
4391 const char *s;
4393 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
4394 for (; *s != '\0'; s++)
4396 val += *s;
4397 if (*s == '(')
4399 /* Skip the file number. */
4400 ++s;
4401 while (isdigit ((unsigned char) *s))
4402 ++s;
4403 --s;
4409 /* If we have already included a header file with the
4410 same value, then replace this one with an N_EXCL
4411 symbol. */
4412 copy = ! finfo->info->keep_memory;
4413 incl_entry = aout_link_includes_lookup (&finfo->includes,
4414 name, true, copy);
4415 if (incl_entry == NULL)
4416 return false;
4417 for (t = incl_entry->totals; t != NULL; t = t->next)
4418 if (t->total == val)
4419 break;
4420 if (t == NULL)
4422 /* This is the first time we have seen this header
4423 file with this set of stabs strings. */
4424 t = ((struct aout_link_includes_totals *)
4425 bfd_hash_allocate (&finfo->includes.root,
4426 sizeof *t));
4427 if (t == NULL)
4428 return false;
4429 t->total = val;
4430 t->next = incl_entry->totals;
4431 incl_entry->totals = t;
4433 else
4435 int *incl_map;
4437 /* This is a duplicate header file. We must change
4438 it to be an N_EXCL entry, and mark all the
4439 included symbols to prevent outputting them. */
4440 type = N_EXCL;
4442 nest = 0;
4443 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
4444 incl_sym < sym_end;
4445 incl_sym++, incl_map++)
4447 int incl_type;
4449 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4450 if (incl_type == N_EINCL)
4452 if (nest == 0)
4454 *incl_map = -1;
4455 break;
4457 --nest;
4459 else if (incl_type == N_BINCL)
4460 ++nest;
4461 else if (nest == 0)
4462 *incl_map = -1;
4468 /* Copy this symbol into the list of symbols we are going to
4469 write out. */
4470 bfd_h_put_8 (output_bfd, type, outsym->e_type);
4471 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
4472 outsym->e_other);
4473 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
4474 outsym->e_desc);
4475 copy = false;
4476 if (! finfo->info->keep_memory)
4478 /* name points into a string table which we are going to
4479 free. If there is a hash table entry, use that string.
4480 Otherwise, copy name into memory. */
4481 if (h != (struct aout_link_hash_entry *) NULL)
4482 name = h->root.root.string;
4483 else
4484 copy = true;
4486 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4487 name, copy);
4488 if (strtab_index == (bfd_size_type) -1)
4489 return false;
4490 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4491 PUT_WORD (output_bfd, val, outsym->e_value);
4492 *symbol_map = obj_aout_external_sym_count (output_bfd);
4493 ++obj_aout_external_sym_count (output_bfd);
4494 ++outsym;
4497 /* Write out the output symbols we have just constructed. */
4498 if (outsym > finfo->output_syms)
4500 bfd_size_type outsym_count;
4502 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4503 return false;
4504 outsym_count = outsym - finfo->output_syms;
4505 if (bfd_write ((PTR) finfo->output_syms,
4506 (bfd_size_type) EXTERNAL_NLIST_SIZE,
4507 (bfd_size_type) outsym_count, output_bfd)
4508 != outsym_count * EXTERNAL_NLIST_SIZE)
4509 return false;
4510 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
4513 return true;
4516 /* Write out a symbol that was not associated with an a.out input
4517 object. */
4519 static boolean
4520 aout_link_write_other_symbol (h, data)
4521 struct aout_link_hash_entry *h;
4522 PTR data;
4524 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4525 bfd *output_bfd;
4526 int type;
4527 bfd_vma val;
4528 struct external_nlist outsym;
4529 bfd_size_type indx;
4531 output_bfd = finfo->output_bfd;
4533 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4535 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4536 (output_bfd, finfo->info, h)))
4538 /* FIXME: No way to handle errors. */
4539 abort ();
4543 if (h->written)
4544 return true;
4546 h->written = true;
4548 /* An indx of -2 means the symbol must be written. */
4549 if (h->indx != -2
4550 && (finfo->info->strip == strip_all
4551 || (finfo->info->strip == strip_some
4552 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4553 false, false) == NULL)))
4554 return true;
4556 switch (h->root.type)
4558 default:
4559 abort ();
4560 /* Avoid variable not initialized warnings. */
4561 return true;
4562 case bfd_link_hash_new:
4563 /* This can happen for set symbols when sets are not being
4564 built. */
4565 return true;
4566 case bfd_link_hash_undefined:
4567 type = N_UNDF | N_EXT;
4568 val = 0;
4569 break;
4570 case bfd_link_hash_defined:
4571 case bfd_link_hash_defweak:
4573 asection *sec;
4575 sec = h->root.u.def.section->output_section;
4576 BFD_ASSERT (bfd_is_abs_section (sec)
4577 || sec->owner == output_bfd);
4578 if (sec == obj_textsec (output_bfd))
4579 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4580 else if (sec == obj_datasec (output_bfd))
4581 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4582 else if (sec == obj_bsssec (output_bfd))
4583 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4584 else
4585 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4586 type |= N_EXT;
4587 val = (h->root.u.def.value
4588 + sec->vma
4589 + h->root.u.def.section->output_offset);
4591 break;
4592 case bfd_link_hash_common:
4593 type = N_UNDF | N_EXT;
4594 val = h->root.u.c.size;
4595 break;
4596 case bfd_link_hash_undefweak:
4597 type = N_WEAKU;
4598 val = 0;
4599 case bfd_link_hash_indirect:
4600 case bfd_link_hash_warning:
4601 /* FIXME: Ignore these for now. The circumstances under which
4602 they should be written out are not clear to me. */
4603 return true;
4606 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4607 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4608 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4609 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4610 false);
4611 if (indx == (bfd_size_type) -1)
4613 /* FIXME: No way to handle errors. */
4614 abort ();
4616 PUT_WORD (output_bfd, indx, outsym.e_strx);
4617 PUT_WORD (output_bfd, val, outsym.e_value);
4619 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4620 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4621 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4623 /* FIXME: No way to handle errors. */
4624 abort ();
4627 finfo->symoff += EXTERNAL_NLIST_SIZE;
4628 h->indx = obj_aout_external_sym_count (output_bfd);
4629 ++obj_aout_external_sym_count (output_bfd);
4631 return true;
4634 /* Link an a.out section into the output file. */
4636 static boolean
4637 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4638 rel_size)
4639 struct aout_final_link_info *finfo;
4640 bfd *input_bfd;
4641 asection *input_section;
4642 file_ptr *reloff_ptr;
4643 bfd_size_type rel_size;
4645 bfd_size_type input_size;
4646 PTR relocs;
4648 /* Get the section contents. */
4649 input_size = bfd_section_size (input_bfd, input_section);
4650 if (! bfd_get_section_contents (input_bfd, input_section,
4651 (PTR) finfo->contents,
4652 (file_ptr) 0, input_size))
4653 return false;
4655 /* Read in the relocs if we haven't already done it. */
4656 if (aout_section_data (input_section) != NULL
4657 && aout_section_data (input_section)->relocs != NULL)
4658 relocs = aout_section_data (input_section)->relocs;
4659 else
4661 relocs = finfo->relocs;
4662 if (rel_size > 0)
4664 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4665 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4666 return false;
4670 /* Relocate the section contents. */
4671 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4673 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4674 (struct reloc_std_external *) relocs,
4675 rel_size, finfo->contents))
4676 return false;
4678 else
4680 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4681 (struct reloc_ext_external *) relocs,
4682 rel_size, finfo->contents))
4683 return false;
4686 /* Write out the section contents. */
4687 if (! bfd_set_section_contents (finfo->output_bfd,
4688 input_section->output_section,
4689 (PTR) finfo->contents,
4690 input_section->output_offset,
4691 input_size))
4692 return false;
4694 /* If we are producing relocateable output, the relocs were
4695 modified, and we now write them out. */
4696 if (finfo->info->relocateable && rel_size > 0)
4698 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4699 return false;
4700 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4701 != rel_size)
4702 return false;
4703 *reloff_ptr += rel_size;
4705 /* Assert that the relocs have not run into the symbols, and
4706 that if these are the text relocs they have not run into the
4707 data relocs. */
4708 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4709 && (reloff_ptr != &finfo->treloff
4710 || (*reloff_ptr
4711 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4714 return true;
4717 /* Get the section corresponding to a reloc index. */
4719 static INLINE asection *
4720 aout_reloc_index_to_section (abfd, indx)
4721 bfd *abfd;
4722 int indx;
4724 switch (indx & N_TYPE)
4726 case N_TEXT:
4727 return obj_textsec (abfd);
4728 case N_DATA:
4729 return obj_datasec (abfd);
4730 case N_BSS:
4731 return obj_bsssec (abfd);
4732 case N_ABS:
4733 case N_UNDF:
4734 return bfd_abs_section_ptr;
4735 default:
4736 abort ();
4738 /*NOTREACHED*/
4739 return NULL;
4742 /* Relocate an a.out section using standard a.out relocs. */
4744 static boolean
4745 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4746 rel_size, contents)
4747 struct aout_final_link_info *finfo;
4748 bfd *input_bfd;
4749 asection *input_section;
4750 struct reloc_std_external *relocs;
4751 bfd_size_type rel_size;
4752 bfd_byte *contents;
4754 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4755 bfd *, asection *,
4756 struct aout_link_hash_entry *,
4757 PTR, bfd_byte *, boolean *,
4758 bfd_vma *));
4759 bfd *output_bfd;
4760 boolean relocateable;
4761 struct external_nlist *syms;
4762 char *strings;
4763 struct aout_link_hash_entry **sym_hashes;
4764 int *symbol_map;
4765 bfd_size_type reloc_count;
4766 register struct reloc_std_external *rel;
4767 struct reloc_std_external *rel_end;
4769 output_bfd = finfo->output_bfd;
4770 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4772 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4773 BFD_ASSERT (input_bfd->xvec->header_byteorder
4774 == output_bfd->xvec->header_byteorder);
4776 relocateable = finfo->info->relocateable;
4777 syms = obj_aout_external_syms (input_bfd);
4778 strings = obj_aout_external_strings (input_bfd);
4779 sym_hashes = obj_aout_sym_hashes (input_bfd);
4780 symbol_map = finfo->symbol_map;
4782 reloc_count = rel_size / RELOC_STD_SIZE;
4783 rel = relocs;
4784 rel_end = rel + reloc_count;
4785 for (; rel < rel_end; rel++)
4787 bfd_vma r_addr;
4788 int r_index;
4789 int r_extern;
4790 int r_pcrel;
4791 int r_baserel = 0;
4792 reloc_howto_type *howto;
4793 struct aout_link_hash_entry *h = NULL;
4794 bfd_vma relocation;
4795 bfd_reloc_status_type r;
4797 r_addr = GET_SWORD (input_bfd, rel->r_address);
4799 #ifdef MY_reloc_howto
4800 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel);
4801 #else
4803 int r_jmptable;
4804 int r_relative;
4805 int r_length;
4806 unsigned int howto_idx;
4808 if (bfd_header_big_endian (input_bfd))
4810 r_index = ((rel->r_index[0] << 16)
4811 | (rel->r_index[1] << 8)
4812 | rel->r_index[2]);
4813 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4814 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4815 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4816 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4817 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4818 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4819 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4821 else
4823 r_index = ((rel->r_index[2] << 16)
4824 | (rel->r_index[1] << 8)
4825 | rel->r_index[0]);
4826 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4827 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4828 r_baserel = (0 != (rel->r_type[0]
4829 & RELOC_STD_BITS_BASEREL_LITTLE));
4830 r_jmptable= (0 != (rel->r_type[0]
4831 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4832 r_relative= (0 != (rel->r_type[0]
4833 & RELOC_STD_BITS_RELATIVE_LITTLE));
4834 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4835 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4838 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4839 + 16 * r_jmptable + 32 * r_relative);
4840 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4841 howto = howto_table_std + howto_idx;
4843 #endif
4845 if (relocateable)
4847 /* We are generating a relocateable output file, and must
4848 modify the reloc accordingly. */
4849 if (r_extern)
4851 /* If we know the symbol this relocation is against,
4852 convert it into a relocation against a section. This
4853 is what the native linker does. */
4854 h = sym_hashes[r_index];
4855 if (h != (struct aout_link_hash_entry *) NULL
4856 && (h->root.type == bfd_link_hash_defined
4857 || h->root.type == bfd_link_hash_defweak))
4859 asection *output_section;
4861 /* Change the r_extern value. */
4862 if (bfd_header_big_endian (output_bfd))
4863 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4864 else
4865 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4867 /* Compute a new r_index. */
4868 output_section = h->root.u.def.section->output_section;
4869 if (output_section == obj_textsec (output_bfd))
4870 r_index = N_TEXT;
4871 else if (output_section == obj_datasec (output_bfd))
4872 r_index = N_DATA;
4873 else if (output_section == obj_bsssec (output_bfd))
4874 r_index = N_BSS;
4875 else
4876 r_index = N_ABS;
4878 /* Add the symbol value and the section VMA to the
4879 addend stored in the contents. */
4880 relocation = (h->root.u.def.value
4881 + output_section->vma
4882 + h->root.u.def.section->output_offset);
4884 else
4886 /* We must change r_index according to the symbol
4887 map. */
4888 r_index = symbol_map[r_index];
4890 if (r_index == -1)
4892 if (h != NULL)
4894 /* We decided to strip this symbol, but it
4895 turns out that we can't. Note that we
4896 lose the other and desc information here.
4897 I don't think that will ever matter for a
4898 global symbol. */
4899 if (h->indx < 0)
4901 h->indx = -2;
4902 h->written = false;
4903 if (! aout_link_write_other_symbol (h,
4904 (PTR) finfo))
4905 return false;
4907 r_index = h->indx;
4909 else
4911 const char *name;
4913 name = strings + GET_WORD (input_bfd,
4914 syms[r_index].e_strx);
4915 if (! ((*finfo->info->callbacks->unattached_reloc)
4916 (finfo->info, name, input_bfd, input_section,
4917 r_addr)))
4918 return false;
4919 r_index = 0;
4923 relocation = 0;
4926 /* Write out the new r_index value. */
4927 if (bfd_header_big_endian (output_bfd))
4929 rel->r_index[0] = r_index >> 16;
4930 rel->r_index[1] = r_index >> 8;
4931 rel->r_index[2] = r_index;
4933 else
4935 rel->r_index[2] = r_index >> 16;
4936 rel->r_index[1] = r_index >> 8;
4937 rel->r_index[0] = r_index;
4940 else
4942 asection *section;
4944 /* This is a relocation against a section. We must
4945 adjust by the amount that the section moved. */
4946 section = aout_reloc_index_to_section (input_bfd, r_index);
4947 relocation = (section->output_section->vma
4948 + section->output_offset
4949 - section->vma);
4952 /* Change the address of the relocation. */
4953 PUT_WORD (output_bfd,
4954 r_addr + input_section->output_offset,
4955 rel->r_address);
4957 /* Adjust a PC relative relocation by removing the reference
4958 to the original address in the section and including the
4959 reference to the new address. */
4960 if (r_pcrel)
4961 relocation -= (input_section->output_section->vma
4962 + input_section->output_offset
4963 - input_section->vma);
4965 #ifdef MY_relocatable_reloc
4966 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4967 #endif
4969 if (relocation == 0)
4970 r = bfd_reloc_ok;
4971 else
4972 r = MY_relocate_contents (howto,
4973 input_bfd, relocation,
4974 contents + r_addr);
4976 else
4978 boolean hundef;
4980 /* We are generating an executable, and must do a full
4981 relocation. */
4982 hundef = false;
4984 if (r_extern)
4986 h = sym_hashes[r_index];
4988 if (h != (struct aout_link_hash_entry *) NULL
4989 && (h->root.type == bfd_link_hash_defined
4990 || h->root.type == bfd_link_hash_defweak))
4992 relocation = (h->root.u.def.value
4993 + h->root.u.def.section->output_section->vma
4994 + h->root.u.def.section->output_offset);
4996 else if (h != (struct aout_link_hash_entry *) NULL
4997 && h->root.type == bfd_link_hash_undefweak)
4998 relocation = 0;
4999 else
5001 hundef = true;
5002 relocation = 0;
5005 else
5007 asection *section;
5009 section = aout_reloc_index_to_section (input_bfd, r_index);
5010 relocation = (section->output_section->vma
5011 + section->output_offset
5012 - section->vma);
5013 if (r_pcrel)
5014 relocation += input_section->vma;
5017 if (check_dynamic_reloc != NULL)
5019 boolean skip;
5021 if (! ((*check_dynamic_reloc)
5022 (finfo->info, input_bfd, input_section, h,
5023 (PTR) rel, contents, &skip, &relocation)))
5024 return false;
5025 if (skip)
5026 continue;
5029 /* Now warn if a global symbol is undefined. We could not
5030 do this earlier, because check_dynamic_reloc might want
5031 to skip this reloc. */
5032 if (hundef && ! finfo->info->shared && ! r_baserel)
5034 const char *name;
5036 if (h != NULL)
5037 name = h->root.root.string;
5038 else
5039 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5040 if (! ((*finfo->info->callbacks->undefined_symbol)
5041 (finfo->info, name, input_bfd, input_section,
5042 r_addr, true)))
5043 return false;
5046 r = MY_final_link_relocate (howto,
5047 input_bfd, input_section,
5048 contents, r_addr, relocation,
5049 (bfd_vma) 0);
5052 if (r != bfd_reloc_ok)
5054 switch (r)
5056 default:
5057 case bfd_reloc_outofrange:
5058 abort ();
5059 case bfd_reloc_overflow:
5061 const char *name;
5063 if (h != NULL)
5064 name = h->root.root.string;
5065 else if (r_extern)
5066 name = strings + GET_WORD (input_bfd,
5067 syms[r_index].e_strx);
5068 else
5070 asection *s;
5072 s = aout_reloc_index_to_section (input_bfd, r_index);
5073 name = bfd_section_name (input_bfd, s);
5075 if (! ((*finfo->info->callbacks->reloc_overflow)
5076 (finfo->info, name, howto->name,
5077 (bfd_vma) 0, input_bfd, input_section, r_addr)))
5078 return false;
5080 break;
5085 return true;
5088 /* Relocate an a.out section using extended a.out relocs. */
5090 static boolean
5091 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
5092 rel_size, contents)
5093 struct aout_final_link_info *finfo;
5094 bfd *input_bfd;
5095 asection *input_section;
5096 struct reloc_ext_external *relocs;
5097 bfd_size_type rel_size;
5098 bfd_byte *contents;
5100 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
5101 bfd *, asection *,
5102 struct aout_link_hash_entry *,
5103 PTR, bfd_byte *, boolean *,
5104 bfd_vma *));
5105 bfd *output_bfd;
5106 boolean relocateable;
5107 struct external_nlist *syms;
5108 char *strings;
5109 struct aout_link_hash_entry **sym_hashes;
5110 int *symbol_map;
5111 bfd_size_type reloc_count;
5112 register struct reloc_ext_external *rel;
5113 struct reloc_ext_external *rel_end;
5115 output_bfd = finfo->output_bfd;
5116 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
5118 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
5119 BFD_ASSERT (input_bfd->xvec->header_byteorder
5120 == output_bfd->xvec->header_byteorder);
5122 relocateable = finfo->info->relocateable;
5123 syms = obj_aout_external_syms (input_bfd);
5124 strings = obj_aout_external_strings (input_bfd);
5125 sym_hashes = obj_aout_sym_hashes (input_bfd);
5126 symbol_map = finfo->symbol_map;
5128 reloc_count = rel_size / RELOC_EXT_SIZE;
5129 rel = relocs;
5130 rel_end = rel + reloc_count;
5131 for (; rel < rel_end; rel++)
5133 bfd_vma r_addr;
5134 int r_index;
5135 int r_extern;
5136 unsigned int r_type;
5137 bfd_vma r_addend;
5138 struct aout_link_hash_entry *h = NULL;
5139 asection *r_section = NULL;
5140 bfd_vma relocation;
5142 r_addr = GET_SWORD (input_bfd, rel->r_address);
5144 if (bfd_header_big_endian (input_bfd))
5146 r_index = ((rel->r_index[0] << 16)
5147 | (rel->r_index[1] << 8)
5148 | rel->r_index[2]);
5149 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
5150 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
5151 >> RELOC_EXT_BITS_TYPE_SH_BIG);
5153 else
5155 r_index = ((rel->r_index[2] << 16)
5156 | (rel->r_index[1] << 8)
5157 | rel->r_index[0]);
5158 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
5159 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
5160 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
5163 r_addend = GET_SWORD (input_bfd, rel->r_addend);
5165 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
5167 if (relocateable)
5169 /* We are generating a relocateable output file, and must
5170 modify the reloc accordingly. */
5171 if (r_extern
5172 || r_type == RELOC_BASE10
5173 || r_type == RELOC_BASE13
5174 || r_type == RELOC_BASE22)
5176 /* If we know the symbol this relocation is against,
5177 convert it into a relocation against a section. This
5178 is what the native linker does. */
5179 if (r_type == RELOC_BASE10
5180 || r_type == RELOC_BASE13
5181 || r_type == RELOC_BASE22)
5182 h = NULL;
5183 else
5184 h = sym_hashes[r_index];
5185 if (h != (struct aout_link_hash_entry *) NULL
5186 && (h->root.type == bfd_link_hash_defined
5187 || h->root.type == bfd_link_hash_defweak))
5189 asection *output_section;
5191 /* Change the r_extern value. */
5192 if (bfd_header_big_endian (output_bfd))
5193 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
5194 else
5195 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
5197 /* Compute a new r_index. */
5198 output_section = h->root.u.def.section->output_section;
5199 if (output_section == obj_textsec (output_bfd))
5200 r_index = N_TEXT;
5201 else if (output_section == obj_datasec (output_bfd))
5202 r_index = N_DATA;
5203 else if (output_section == obj_bsssec (output_bfd))
5204 r_index = N_BSS;
5205 else
5206 r_index = N_ABS;
5208 /* Add the symbol value and the section VMA to the
5209 addend. */
5210 relocation = (h->root.u.def.value
5211 + output_section->vma
5212 + h->root.u.def.section->output_offset);
5214 /* Now RELOCATION is the VMA of the final
5215 destination. If this is a PC relative reloc,
5216 then ADDEND is the negative of the source VMA.
5217 We want to set ADDEND to the difference between
5218 the destination VMA and the source VMA, which
5219 means we must adjust RELOCATION by the change in
5220 the source VMA. This is done below. */
5222 else
5224 /* We must change r_index according to the symbol
5225 map. */
5226 r_index = symbol_map[r_index];
5228 if (r_index == -1)
5230 if (h != NULL)
5232 /* We decided to strip this symbol, but it
5233 turns out that we can't. Note that we
5234 lose the other and desc information here.
5235 I don't think that will ever matter for a
5236 global symbol. */
5237 if (h->indx < 0)
5239 h->indx = -2;
5240 h->written = false;
5241 if (! aout_link_write_other_symbol (h,
5242 (PTR) finfo))
5243 return false;
5245 r_index = h->indx;
5247 else
5249 const char *name;
5251 name = strings + GET_WORD (input_bfd,
5252 syms[r_index].e_strx);
5253 if (! ((*finfo->info->callbacks->unattached_reloc)
5254 (finfo->info, name, input_bfd, input_section,
5255 r_addr)))
5256 return false;
5257 r_index = 0;
5261 relocation = 0;
5263 /* If this is a PC relative reloc, then the addend
5264 is the negative of the source VMA. We must
5265 adjust it by the change in the source VMA. This
5266 is done below. */
5269 /* Write out the new r_index value. */
5270 if (bfd_header_big_endian (output_bfd))
5272 rel->r_index[0] = r_index >> 16;
5273 rel->r_index[1] = r_index >> 8;
5274 rel->r_index[2] = r_index;
5276 else
5278 rel->r_index[2] = r_index >> 16;
5279 rel->r_index[1] = r_index >> 8;
5280 rel->r_index[0] = r_index;
5283 else
5285 /* This is a relocation against a section. We must
5286 adjust by the amount that the section moved. */
5287 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5288 relocation = (r_section->output_section->vma
5289 + r_section->output_offset
5290 - r_section->vma);
5292 /* If this is a PC relative reloc, then the addend is
5293 the difference in VMA between the destination and the
5294 source. We have just adjusted for the change in VMA
5295 of the destination, so we must also adjust by the
5296 change in VMA of the source. This is done below. */
5299 /* As described above, we must always adjust a PC relative
5300 reloc by the change in VMA of the source. However, if
5301 pcrel_offset is set, then the addend does not include the
5302 location within the section, in which case we don't need
5303 to adjust anything. */
5304 if (howto_table_ext[r_type].pc_relative
5305 && ! howto_table_ext[r_type].pcrel_offset)
5306 relocation -= (input_section->output_section->vma
5307 + input_section->output_offset
5308 - input_section->vma);
5310 /* Change the addend if necessary. */
5311 if (relocation != 0)
5312 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
5314 /* Change the address of the relocation. */
5315 PUT_WORD (output_bfd,
5316 r_addr + input_section->output_offset,
5317 rel->r_address);
5319 else
5321 boolean hundef;
5322 bfd_reloc_status_type r;
5324 /* We are generating an executable, and must do a full
5325 relocation. */
5326 hundef = false;
5328 if (r_extern)
5330 h = sym_hashes[r_index];
5332 if (h != (struct aout_link_hash_entry *) NULL
5333 && (h->root.type == bfd_link_hash_defined
5334 || h->root.type == bfd_link_hash_defweak))
5336 relocation = (h->root.u.def.value
5337 + h->root.u.def.section->output_section->vma
5338 + h->root.u.def.section->output_offset);
5340 else if (h != (struct aout_link_hash_entry *) NULL
5341 && h->root.type == bfd_link_hash_undefweak)
5342 relocation = 0;
5343 else
5345 hundef = true;
5346 relocation = 0;
5349 else if (r_type == RELOC_BASE10
5350 || r_type == RELOC_BASE13
5351 || r_type == RELOC_BASE22)
5353 struct external_nlist *sym;
5354 int type;
5356 /* For base relative relocs, r_index is always an index
5357 into the symbol table, even if r_extern is 0. */
5358 sym = syms + r_index;
5359 type = bfd_h_get_8 (input_bfd, sym->e_type);
5360 if ((type & N_TYPE) == N_TEXT
5361 || type == N_WEAKT)
5362 r_section = obj_textsec (input_bfd);
5363 else if ((type & N_TYPE) == N_DATA
5364 || type == N_WEAKD)
5365 r_section = obj_datasec (input_bfd);
5366 else if ((type & N_TYPE) == N_BSS
5367 || type == N_WEAKB)
5368 r_section = obj_bsssec (input_bfd);
5369 else if ((type & N_TYPE) == N_ABS
5370 || type == N_WEAKA)
5371 r_section = bfd_abs_section_ptr;
5372 else
5373 abort ();
5374 relocation = (r_section->output_section->vma
5375 + r_section->output_offset
5376 + (GET_WORD (input_bfd, sym->e_value)
5377 - r_section->vma));
5379 else
5381 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5383 /* If this is a PC relative reloc, then R_ADDEND is the
5384 difference between the two vmas, or
5385 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
5386 where
5387 old_dest_sec == section->vma
5389 old_src_sec == input_section->vma
5391 old_src_off == r_addr
5393 _bfd_final_link_relocate expects RELOCATION +
5394 R_ADDEND to be the VMA of the destination minus
5395 r_addr (the minus r_addr is because this relocation
5396 is not pcrel_offset, which is a bit confusing and
5397 should, perhaps, be changed), or
5398 new_dest_sec
5399 where
5400 new_dest_sec == output_section->vma + output_offset
5401 We arrange for this to happen by setting RELOCATION to
5402 new_dest_sec + old_src_sec - old_dest_sec
5404 If this is not a PC relative reloc, then R_ADDEND is
5405 simply the VMA of the destination, so we set
5406 RELOCATION to the change in the destination VMA, or
5407 new_dest_sec - old_dest_sec
5409 relocation = (r_section->output_section->vma
5410 + r_section->output_offset
5411 - r_section->vma);
5412 if (howto_table_ext[r_type].pc_relative)
5413 relocation += input_section->vma;
5416 if (check_dynamic_reloc != NULL)
5418 boolean skip;
5420 if (! ((*check_dynamic_reloc)
5421 (finfo->info, input_bfd, input_section, h,
5422 (PTR) rel, contents, &skip, &relocation)))
5423 return false;
5424 if (skip)
5425 continue;
5428 /* Now warn if a global symbol is undefined. We could not
5429 do this earlier, because check_dynamic_reloc might want
5430 to skip this reloc. */
5431 if (hundef
5432 && ! finfo->info->shared
5433 && r_type != RELOC_BASE10
5434 && r_type != RELOC_BASE13
5435 && r_type != RELOC_BASE22)
5437 const char *name;
5439 if (h != NULL)
5440 name = h->root.root.string;
5441 else
5442 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5443 if (! ((*finfo->info->callbacks->undefined_symbol)
5444 (finfo->info, name, input_bfd, input_section,
5445 r_addr, true)))
5446 return false;
5449 if (r_type != RELOC_SPARC_REV32)
5450 r = MY_final_link_relocate (howto_table_ext + r_type,
5451 input_bfd, input_section,
5452 contents, r_addr, relocation,
5453 r_addend);
5454 else
5456 bfd_vma x;
5458 x = bfd_get_32 (input_bfd, contents + r_addr);
5459 x = x + relocation + r_addend;
5460 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
5461 r = bfd_reloc_ok;
5464 if (r != bfd_reloc_ok)
5466 switch (r)
5468 default:
5469 case bfd_reloc_outofrange:
5470 abort ();
5471 case bfd_reloc_overflow:
5473 const char *name;
5475 if (h != NULL)
5476 name = h->root.root.string;
5477 else if (r_extern
5478 || r_type == RELOC_BASE10
5479 || r_type == RELOC_BASE13
5480 || r_type == RELOC_BASE22)
5481 name = strings + GET_WORD (input_bfd,
5482 syms[r_index].e_strx);
5483 else
5485 asection *s;
5487 s = aout_reloc_index_to_section (input_bfd, r_index);
5488 name = bfd_section_name (input_bfd, s);
5490 if (! ((*finfo->info->callbacks->reloc_overflow)
5491 (finfo->info, name, howto_table_ext[r_type].name,
5492 r_addend, input_bfd, input_section, r_addr)))
5493 return false;
5495 break;
5501 return true;
5504 /* Handle a link order which is supposed to generate a reloc. */
5506 static boolean
5507 aout_link_reloc_link_order (finfo, o, p)
5508 struct aout_final_link_info *finfo;
5509 asection *o;
5510 struct bfd_link_order *p;
5512 struct bfd_link_order_reloc *pr;
5513 int r_index;
5514 int r_extern;
5515 reloc_howto_type *howto;
5516 file_ptr *reloff_ptr = NULL;
5517 struct reloc_std_external srel;
5518 struct reloc_ext_external erel;
5519 PTR rel_ptr;
5521 pr = p->u.reloc.p;
5523 if (p->type == bfd_section_reloc_link_order)
5525 r_extern = 0;
5526 if (bfd_is_abs_section (pr->u.section))
5527 r_index = N_ABS | N_EXT;
5528 else
5530 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5531 r_index = pr->u.section->target_index;
5534 else
5536 struct aout_link_hash_entry *h;
5538 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5539 r_extern = 1;
5540 h = ((struct aout_link_hash_entry *)
5541 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
5542 pr->u.name, false, false, true));
5543 if (h != (struct aout_link_hash_entry *) NULL
5544 && h->indx >= 0)
5545 r_index = h->indx;
5546 else if (h != NULL)
5548 /* We decided to strip this symbol, but it turns out that we
5549 can't. Note that we lose the other and desc information
5550 here. I don't think that will ever matter for a global
5551 symbol. */
5552 h->indx = -2;
5553 h->written = false;
5554 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5555 return false;
5556 r_index = h->indx;
5558 else
5560 if (! ((*finfo->info->callbacks->unattached_reloc)
5561 (finfo->info, pr->u.name, (bfd *) NULL,
5562 (asection *) NULL, (bfd_vma) 0)))
5563 return false;
5564 r_index = 0;
5568 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5569 if (howto == 0)
5571 bfd_set_error (bfd_error_bad_value);
5572 return false;
5575 if (o == obj_textsec (finfo->output_bfd))
5576 reloff_ptr = &finfo->treloff;
5577 else if (o == obj_datasec (finfo->output_bfd))
5578 reloff_ptr = &finfo->dreloff;
5579 else
5580 abort ();
5582 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5584 #ifdef MY_put_reloc
5585 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto,
5586 &srel);
5587 #else
5589 int r_pcrel;
5590 int r_baserel;
5591 int r_jmptable;
5592 int r_relative;
5593 int r_length;
5595 r_pcrel = howto->pc_relative;
5596 r_baserel = (howto->type & 8) != 0;
5597 r_jmptable = (howto->type & 16) != 0;
5598 r_relative = (howto->type & 32) != 0;
5599 r_length = howto->size;
5601 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5602 if (bfd_header_big_endian (finfo->output_bfd))
5604 srel.r_index[0] = r_index >> 16;
5605 srel.r_index[1] = r_index >> 8;
5606 srel.r_index[2] = r_index;
5607 srel.r_type[0] =
5608 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5609 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5610 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5611 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5612 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5613 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5615 else
5617 srel.r_index[2] = r_index >> 16;
5618 srel.r_index[1] = r_index >> 8;
5619 srel.r_index[0] = r_index;
5620 srel.r_type[0] =
5621 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5622 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5623 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5624 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5625 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5626 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5629 #endif
5630 rel_ptr = (PTR) &srel;
5632 /* We have to write the addend into the object file, since
5633 standard a.out relocs are in place. It would be more
5634 reliable if we had the current contents of the file here,
5635 rather than assuming zeroes, but we can't read the file since
5636 it was opened using bfd_openw. */
5637 if (pr->addend != 0)
5639 bfd_size_type size;
5640 bfd_reloc_status_type r;
5641 bfd_byte *buf;
5642 boolean ok;
5644 size = bfd_get_reloc_size (howto);
5645 buf = (bfd_byte *) bfd_zmalloc (size);
5646 if (buf == (bfd_byte *) NULL)
5647 return false;
5648 r = MY_relocate_contents (howto, finfo->output_bfd,
5649 pr->addend, buf);
5650 switch (r)
5652 case bfd_reloc_ok:
5653 break;
5654 default:
5655 case bfd_reloc_outofrange:
5656 abort ();
5657 case bfd_reloc_overflow:
5658 if (! ((*finfo->info->callbacks->reloc_overflow)
5659 (finfo->info,
5660 (p->type == bfd_section_reloc_link_order
5661 ? bfd_section_name (finfo->output_bfd,
5662 pr->u.section)
5663 : pr->u.name),
5664 howto->name, pr->addend, (bfd *) NULL,
5665 (asection *) NULL, (bfd_vma) 0)))
5667 free (buf);
5668 return false;
5670 break;
5672 ok = bfd_set_section_contents (finfo->output_bfd, o,
5673 (PTR) buf,
5674 (file_ptr) p->offset,
5675 size);
5676 free (buf);
5677 if (! ok)
5678 return false;
5681 else
5683 #ifdef MY_put_ext_reloc
5684 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
5685 howto, &erel, pr->addend);
5686 #else
5687 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5689 if (bfd_header_big_endian (finfo->output_bfd))
5691 erel.r_index[0] = r_index >> 16;
5692 erel.r_index[1] = r_index >> 8;
5693 erel.r_index[2] = r_index;
5694 erel.r_type[0] =
5695 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5696 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5698 else
5700 erel.r_index[2] = r_index >> 16;
5701 erel.r_index[1] = r_index >> 8;
5702 erel.r_index[0] = r_index;
5703 erel.r_type[0] =
5704 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5705 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5708 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
5709 #endif /* MY_put_ext_reloc */
5711 rel_ptr = (PTR) &erel;
5714 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5715 || (bfd_write (rel_ptr, (bfd_size_type) 1,
5716 obj_reloc_entry_size (finfo->output_bfd),
5717 finfo->output_bfd)
5718 != obj_reloc_entry_size (finfo->output_bfd)))
5719 return false;
5721 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5723 /* Assert that the relocs have not run into the symbols, and that n
5724 the text relocs have not run into the data relocs. */
5725 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5726 && (reloff_ptr != &finfo->treloff
5727 || (*reloff_ptr
5728 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
5730 return true;