1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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
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
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
61 | aout_32_canonicalize_reloc
62 | aout_32_find_nearest_line
64 | aout_32_get_reloc_upper_bound
69 | #define TARGET_NAME "a.out-sunos-big"
70 | #define VECNAME sunos_big_vec
73 requires all the names from @file{aout32.c}, and produces the jump vector
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
87 When porting it to run on a new system, you must supply:
91 | HOST_MACHINE_ARCH (optional)
92 | HOST_MACHINE_MACHINE (optional)
93 | HOST_TEXT_START_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}
107 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
108 configuration is selected. */
111 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
112 Doesn't matter what the setting of WP_TEXT is on output, but it'll
114 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
115 * Any BFD with both flags clear is OMAGIC.
116 (Just want to make these explicit, so the conditions tested in this
117 file make sense if you're more familiar with a.out than with BFD.) */
119 #define KEEPIT udata.i
123 #include "safe-ctype.h"
128 #include "aout/aout64.h"
129 #include "aout/stab_gnu.h"
137 The file @file{aoutx.h} provides for both the @emph{standard}
138 and @emph{extended} forms of a.out relocation records.
140 The standard records contain only an
141 address, a symbol index, and a type field. The extended records
142 (used on 29ks and sparcs) also have a full integer for an
145 #ifndef CTOR_TABLE_RELOC_HOWTO
146 #define CTOR_TABLE_RELOC_IDX 2
147 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
148 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
149 ? howto_table_ext : howto_table_std) \
150 + CTOR_TABLE_RELOC_IDX)
153 #ifndef MY_swap_std_reloc_in
154 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
157 #ifndef MY_swap_ext_reloc_in
158 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
161 #ifndef MY_swap_std_reloc_out
162 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
165 #ifndef MY_swap_ext_reloc_out
166 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
169 #ifndef MY_final_link_relocate
170 #define MY_final_link_relocate _bfd_final_link_relocate
173 #ifndef MY_relocate_contents
174 #define MY_relocate_contents _bfd_relocate_contents
177 #define howto_table_ext NAME (aout, ext_howto_table)
178 #define howto_table_std NAME (aout, std_howto_table)
180 reloc_howto_type howto_table_ext[] =
182 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
183 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE),
184 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE),
185 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE),
186 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE),
187 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE),
188 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE),
189 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE),
190 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE),
191 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE),
192 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE),
193 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE),
194 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE),
195 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE),
196 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE),
197 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE),
198 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE),
199 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE),
200 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE),
201 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE),
202 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE),
203 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE),
204 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE),
205 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE),
206 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE),
207 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
208 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
209 #define RELOC_SPARC_REV32 RELOC_WDISP19
210 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE),
213 /* Convert standard reloc records to "arelent" format (incl byte swap). */
215 reloc_howto_type howto_table_std[] =
217 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
218 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
219 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
220 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
221 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
222 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
223 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
224 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
225 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
226 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
227 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
228 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
234 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
250 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
258 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
261 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
264 NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
266 #define EXT(i, j) case i: return & howto_table_ext [j]
267 #define STD(i, j) case i: return & howto_table_std [j]
268 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
270 if (code == BFD_RELOC_CTOR)
271 switch (bfd_get_arch_info (abfd)->bits_per_address)
284 EXT (BFD_RELOC_8, 0);
285 EXT (BFD_RELOC_16, 1);
286 EXT (BFD_RELOC_32, 2);
287 EXT (BFD_RELOC_HI22, 8);
288 EXT (BFD_RELOC_LO10, 11);
289 EXT (BFD_RELOC_32_PCREL_S2, 6);
290 EXT (BFD_RELOC_SPARC_WDISP22, 7);
291 EXT (BFD_RELOC_SPARC13, 10);
292 EXT (BFD_RELOC_SPARC_GOT10, 14);
293 EXT (BFD_RELOC_SPARC_BASE13, 15);
294 EXT (BFD_RELOC_SPARC_GOT13, 15);
295 EXT (BFD_RELOC_SPARC_GOT22, 16);
296 EXT (BFD_RELOC_SPARC_PC10, 17);
297 EXT (BFD_RELOC_SPARC_PC22, 18);
298 EXT (BFD_RELOC_SPARC_WPLT30, 19);
299 EXT (BFD_RELOC_SPARC_REV32, 26);
307 STD (BFD_RELOC_8, 0);
308 STD (BFD_RELOC_16, 1);
309 STD (BFD_RELOC_32, 2);
310 STD (BFD_RELOC_8_PCREL, 4);
311 STD (BFD_RELOC_16_PCREL, 5);
312 STD (BFD_RELOC_32_PCREL, 6);
313 STD (BFD_RELOC_16_BASEREL, 9);
314 STD (BFD_RELOC_32_BASEREL, 10);
321 NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name)
323 unsigned int i, size;
324 reloc_howto_type *howto_table;
326 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE)
328 howto_table = howto_table_ext;
329 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]);
333 howto_table = howto_table_std;
334 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]);
337 for (i = 0; i < size; i++)
338 if (howto_table[i].name != NULL
339 && strcasecmp (howto_table[i].name, r_name) == 0)
340 return &howto_table[i];
347 Internal entry points
350 @file{aoutx.h} exports several routines for accessing the
351 contents of an a.out file, which are gathered and exported in
352 turn by various format specific files (eg sunos.c).
357 aout_@var{size}_swap_exec_header_in
360 void aout_@var{size}_swap_exec_header_in,
362 struct external_exec *bytes,
363 struct internal_exec *execp);
366 Swap the information in an executable header @var{raw_bytes} taken
367 from a raw byte stream memory image into the internal exec header
368 structure @var{execp}.
371 #ifndef NAME_swap_exec_header_in
373 NAME (aout, swap_exec_header_in) (bfd *abfd,
374 struct external_exec *bytes,
375 struct internal_exec *execp)
377 /* The internal_exec structure has some fields that are unused in this
378 configuration (IE for i960), so ensure that all such uninitialized
379 fields are zero'd out. There are places where two of these structs
380 are memcmp'd, and thus the contents do matter. */
381 memset ((void *) execp, 0, sizeof (struct internal_exec));
382 /* Now fill in fields in the execp, from the bytes in the raw data. */
383 execp->a_info = H_GET_32 (abfd, bytes->e_info);
384 execp->a_text = GET_WORD (abfd, bytes->e_text);
385 execp->a_data = GET_WORD (abfd, bytes->e_data);
386 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
387 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
388 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
389 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
390 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
392 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
397 aout_@var{size}_swap_exec_header_out
400 void aout_@var{size}_swap_exec_header_out
402 struct internal_exec *execp,
403 struct external_exec *raw_bytes);
406 Swap the information in an internal exec header structure
407 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
410 NAME (aout, swap_exec_header_out) (bfd *abfd,
411 struct internal_exec *execp,
412 struct external_exec *bytes)
414 /* Now fill in fields in the raw data, from the fields in the exec struct. */
415 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
416 PUT_WORD (abfd, execp->a_text , bytes->e_text);
417 PUT_WORD (abfd, execp->a_data , bytes->e_data);
418 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
419 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
420 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
421 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
422 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
425 /* Make all the section for an a.out file. */
428 NAME (aout, make_sections) (bfd *abfd)
430 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL)
432 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL)
434 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL)
441 aout_@var{size}_some_aout_object_p
444 const bfd_target *aout_@var{size}_some_aout_object_p
446 struct internal_exec *execp,
447 const bfd_target *(*callback_to_real_object_p) (bfd *));
450 Some a.out variant thinks that the file open in @var{abfd}
451 checking is an a.out file. Do some more checking, and set up
452 for access if it really is. Call back to the calling
453 environment's "finish up" function just before returning, to
454 handle any last-minute setup.
458 NAME (aout, some_aout_object_p) (bfd *abfd,
459 struct internal_exec *execp,
460 const bfd_target *(*callback_to_real_object_p) (bfd *))
462 struct aout_data_struct *rawptr, *oldrawptr;
463 const bfd_target *result;
464 bfd_size_type amt = sizeof (* rawptr);
466 rawptr = bfd_zalloc (abfd, amt);
470 oldrawptr = abfd->tdata.aout_data;
471 abfd->tdata.aout_data = rawptr;
473 /* Copy the contents of the old tdata struct.
474 In particular, we want the subformat, since for hpux it was set in
475 hp300hpux.c:swap_exec_header_in and will be used in
476 hp300hpux.c:callback. */
477 if (oldrawptr != NULL)
478 *abfd->tdata.aout_data = *oldrawptr;
480 abfd->tdata.aout_data->a.hdr = &rawptr->e;
481 /* Copy in the internal_exec struct. */
482 *(abfd->tdata.aout_data->a.hdr) = *execp;
483 execp = abfd->tdata.aout_data->a.hdr;
485 /* Set the file flags. */
486 abfd->flags = BFD_NO_FLAGS;
487 if (execp->a_drsize || execp->a_trsize)
488 abfd->flags |= HAS_RELOC;
489 /* Setting of EXEC_P has been deferred to the bottom of this function. */
491 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
492 if (N_DYNAMIC (*execp))
493 abfd->flags |= DYNAMIC;
495 if (N_MAGIC (*execp) == ZMAGIC)
497 abfd->flags |= D_PAGED | WP_TEXT;
498 adata (abfd).magic = z_magic;
500 else if (N_MAGIC (*execp) == QMAGIC)
502 abfd->flags |= D_PAGED | WP_TEXT;
503 adata (abfd).magic = z_magic;
504 adata (abfd).subformat = q_magic_format;
506 else if (N_MAGIC (*execp) == NMAGIC)
508 abfd->flags |= WP_TEXT;
509 adata (abfd).magic = n_magic;
511 else if (N_MAGIC (*execp) == OMAGIC
512 || N_MAGIC (*execp) == BMAGIC)
513 adata (abfd).magic = o_magic;
515 /* Should have been checked with N_BADMAG before this routine
519 bfd_get_start_address (abfd) = execp->a_entry;
521 obj_aout_symbols (abfd) = NULL;
522 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
524 /* The default relocation entry size is that of traditional V7 Unix. */
525 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
527 /* The default symbol entry size is that of traditional Unix. */
528 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
531 bfd_init_window (&obj_aout_sym_window (abfd));
532 bfd_init_window (&obj_aout_string_window (abfd));
534 obj_aout_external_syms (abfd) = NULL;
535 obj_aout_external_strings (abfd) = NULL;
536 obj_aout_sym_hashes (abfd) = NULL;
538 if (! NAME (aout, make_sections) (abfd))
541 obj_datasec (abfd)->size = execp->a_data;
542 obj_bsssec (abfd)->size = execp->a_bss;
544 obj_textsec (abfd)->flags =
545 (execp->a_trsize != 0
546 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
547 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
548 obj_datasec (abfd)->flags =
549 (execp->a_drsize != 0
550 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
551 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
552 obj_bsssec (abfd)->flags = SEC_ALLOC;
554 #ifdef THIS_IS_ONLY_DOCUMENTATION
555 /* The common code can't fill in these things because they depend
556 on either the start address of the text segment, the rounding
557 up of virtual addresses between segments, or the starting file
558 position of the text segment -- all of which varies among different
559 versions of a.out. */
561 /* Call back to the format-dependent code to fill in the rest of the
562 fields and do any further cleanup. Things that should be filled
563 in by the callback: */
565 struct exec *execp = exec_hdr (abfd);
567 obj_textsec (abfd)->size = N_TXTSIZE (*execp);
568 /* Data and bss are already filled in since they're so standard. */
570 /* The virtual memory addresses of the sections. */
571 obj_textsec (abfd)->vma = N_TXTADDR (*execp);
572 obj_datasec (abfd)->vma = N_DATADDR (*execp);
573 obj_bsssec (abfd)->vma = N_BSSADDR (*execp);
575 /* The file offsets of the sections. */
576 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
577 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
579 /* The file offsets of the relocation info. */
580 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp);
581 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp);
583 /* The file offsets of the string table and symbol table. */
584 obj_str_filepos (abfd) = N_STROFF (*execp);
585 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
587 /* Determine the architecture and machine type of the object file. */
588 switch (N_MACHTYPE (*exec_hdr (abfd)))
591 abfd->obj_arch = bfd_arch_obscure;
595 adata (abfd)->page_size = TARGET_PAGE_SIZE;
596 adata (abfd)->segment_size = SEGMENT_SIZE;
597 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
601 /* The architecture is encoded in various ways in various a.out variants,
602 or is not encoded at all in some of them. The relocation size depends
603 on the architecture and the a.out variant. Finally, the return value
604 is the bfd_target vector in use. If an error occurs, return zero and
605 set bfd_error to the appropriate error code.
607 Formats such as b.out, which have additional fields in the a.out
608 header, should cope with them in this callback as well. */
609 #endif /* DOCUMENTATION */
611 result = (*callback_to_real_object_p) (abfd);
613 /* Now that the segment addresses have been worked out, take a better
614 guess at whether the file is executable. If the entry point
615 is within the text segment, assume it is. (This makes files
616 executable even if their entry point address is 0, as long as
617 their text starts at zero.).
619 This test had to be changed to deal with systems where the text segment
620 runs at a different location than the default. The problem is that the
621 entry address can appear to be outside the text segment, thus causing an
622 erroneous conclusion that the file isn't executable.
624 To fix this, we now accept any non-zero entry point as an indication of
625 executability. This will work most of the time, since only the linker
626 sets the entry point, and that is likely to be non-zero for most systems. */
628 if (execp->a_entry != 0
629 || (execp->a_entry >= obj_textsec (abfd)->vma
630 && execp->a_entry < (obj_textsec (abfd)->vma
631 + obj_textsec (abfd)->size)))
632 abfd->flags |= EXEC_P;
636 struct stat stat_buf;
638 /* The original heuristic doesn't work in some important cases.
639 The a.out file has no information about the text start
640 address. For files (like kernels) linked to non-standard
641 addresses (ld -Ttext nnn) the entry point may not be between
642 the default text start (obj_textsec(abfd)->vma) and
643 (obj_textsec(abfd)->vma) + text size. This is not just a mach
644 issue. Many kernels are loaded at non standard addresses. */
645 if (abfd->iostream != NULL
646 && (abfd->flags & BFD_IN_MEMORY) == 0
647 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
648 && ((stat_buf.st_mode & 0111) != 0))
649 abfd->flags |= EXEC_P;
651 #endif /* STAT_FOR_EXEC */
657 bfd_release (abfd, rawptr);
658 abfd->tdata.aout_data = oldrawptr;
664 aout_@var{size}_mkobject
667 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
670 Initialize BFD @var{abfd} for use with a.out files.
674 NAME (aout, mkobject) (bfd *abfd)
676 struct aout_data_struct *rawptr;
677 bfd_size_type amt = sizeof (* rawptr);
679 bfd_set_error (bfd_error_system_call);
681 rawptr = bfd_zalloc (abfd, amt);
685 abfd->tdata.aout_data = rawptr;
686 exec_hdr (abfd) = &(rawptr->e);
688 obj_textsec (abfd) = NULL;
689 obj_datasec (abfd) = NULL;
690 obj_bsssec (abfd) = NULL;
697 aout_@var{size}_machine_type
700 enum machine_type aout_@var{size}_machine_type
701 (enum bfd_architecture arch,
702 unsigned long machine,
703 bfd_boolean *unknown);
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.
716 NAME (aout, machine_type) (enum bfd_architecture arch,
717 unsigned long machine,
718 bfd_boolean *unknown)
720 enum machine_type arch_flags;
722 arch_flags = M_UNKNOWN;
729 || machine == bfd_mach_sparc
730 || machine == bfd_mach_sparc_sparclite
731 || machine == bfd_mach_sparc_sparclite_le
732 || machine == bfd_mach_sparc_v8plus
733 || machine == bfd_mach_sparc_v8plusa
734 || machine == bfd_mach_sparc_v8plusb
735 || machine == bfd_mach_sparc_v9
736 || machine == bfd_mach_sparc_v9a
737 || machine == bfd_mach_sparc_v9b)
738 arch_flags = M_SPARC;
739 else if (machine == bfd_mach_sparc_sparclet)
740 arch_flags = M_SPARCLET;
746 case 0: arch_flags = M_68010; break;
747 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break;
748 case bfd_mach_m68010: arch_flags = M_68010; break;
749 case bfd_mach_m68020: arch_flags = M_68020; break;
750 default: arch_flags = M_UNKNOWN; break;
756 || machine == bfd_mach_i386_i386
757 || machine == bfd_mach_i386_i386_intel_syntax)
770 case bfd_mach_mips3000:
771 case bfd_mach_mips3900:
772 arch_flags = M_MIPS1;
774 case bfd_mach_mips6000:
775 arch_flags = M_MIPS2;
777 case bfd_mach_mips4000:
778 case bfd_mach_mips4010:
779 case bfd_mach_mips4100:
780 case bfd_mach_mips4300:
781 case bfd_mach_mips4400:
782 case bfd_mach_mips4600:
783 case bfd_mach_mips4650:
784 case bfd_mach_mips8000:
785 case bfd_mach_mips9000:
786 case bfd_mach_mips10000:
787 case bfd_mach_mips12000:
788 case bfd_mach_mips16:
789 case bfd_mach_mipsisa32:
790 case bfd_mach_mipsisa32r2:
792 case bfd_mach_mipsisa64:
793 case bfd_mach_mipsisa64r2:
794 case bfd_mach_mips_sb1:
795 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
796 arch_flags = M_MIPS2;
799 arch_flags = M_UNKNOWN;
807 case 0: arch_flags = M_NS32532; break;
808 case 32032: arch_flags = M_NS32032; break;
809 case 32532: arch_flags = M_NS32532; break;
810 default: arch_flags = M_UNKNOWN; break;
819 if (machine == 0 || machine == 255)
828 arch_flags = M_UNKNOWN;
831 if (arch_flags != M_UNKNOWN)
839 aout_@var{size}_set_arch_mach
842 bfd_boolean aout_@var{size}_set_arch_mach,
844 enum bfd_architecture arch,
845 unsigned long machine);
848 Set the architecture and the machine of the BFD @var{abfd} to the
849 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
850 can support the architecture required.
854 NAME (aout, set_arch_mach) (bfd *abfd,
855 enum bfd_architecture arch,
856 unsigned long machine)
858 if (! bfd_default_set_arch_mach (abfd, arch, machine))
861 if (arch != bfd_arch_unknown)
865 NAME (aout, machine_type) (arch, machine, &unknown);
870 /* Determine the size of a relocation entry. */
875 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
878 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
882 return (*aout_backend_info (abfd)->set_sizes) (abfd);
886 adjust_o_magic (bfd *abfd, struct internal_exec *execp)
888 file_ptr pos = adata (abfd).exec_bytes_size;
893 obj_textsec (abfd)->filepos = pos;
894 if (!obj_textsec (abfd)->user_set_vma)
895 obj_textsec (abfd)->vma = vma;
897 vma = obj_textsec (abfd)->vma;
899 pos += obj_textsec (abfd)->size;
900 vma += obj_textsec (abfd)->size;
903 if (!obj_datasec (abfd)->user_set_vma)
905 obj_textsec (abfd)->size += pad;
908 obj_datasec (abfd)->vma = vma;
911 vma = obj_datasec (abfd)->vma;
912 obj_datasec (abfd)->filepos = pos;
913 pos += obj_datasec (abfd)->size;
914 vma += obj_datasec (abfd)->size;
917 if (!obj_bsssec (abfd)->user_set_vma)
919 obj_datasec (abfd)->size += pad;
922 obj_bsssec (abfd)->vma = vma;
926 /* The VMA of the .bss section is set by the VMA of the
927 .data section plus the size of the .data section. We may
928 need to add padding bytes to make this true. */
929 pad = obj_bsssec (abfd)->vma - vma;
932 obj_datasec (abfd)->size += pad;
936 obj_bsssec (abfd)->filepos = pos;
938 /* Fix up the exec header. */
939 execp->a_text = obj_textsec (abfd)->size;
940 execp->a_data = obj_datasec (abfd)->size;
941 execp->a_bss = obj_bsssec (abfd)->size;
942 N_SET_MAGIC (*execp, OMAGIC);
946 adjust_z_magic (bfd *abfd, struct internal_exec *execp)
948 bfd_size_type data_pad, text_pad;
950 const struct aout_backend_data *abdp;
951 /* TRUE if text includes exec header. */
954 abdp = aout_backend_info (abfd);
958 && (abdp->text_includes_header
959 || obj_aout_subformat (abfd) == q_magic_format));
960 obj_textsec (abfd)->filepos = (ztih
961 ? adata (abfd).exec_bytes_size
962 : adata (abfd).zmagic_disk_block_size);
963 if (! obj_textsec (abfd)->user_set_vma)
965 /* ?? Do we really need to check for relocs here? */
966 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
969 ? (abdp->default_text_vma
970 + adata (abfd).exec_bytes_size)
971 : abdp->default_text_vma));
976 /* The .text section is being loaded at an unusual address. We
977 may need to pad it such that the .data section starts at a page
980 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
981 & (adata (abfd).page_size - 1));
983 text_pad = ((- obj_textsec (abfd)->vma)
984 & (adata (abfd).page_size - 1));
987 /* Find start of data. */
990 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size;
991 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
995 /* Note that if page_size == zmagic_disk_block_size, then
996 filepos == page_size, and this case is the same as the ztih
998 text_end = obj_textsec (abfd)->size;
999 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1000 text_end += obj_textsec (abfd)->filepos;
1002 obj_textsec (abfd)->size += text_pad;
1003 text_end += text_pad;
1006 if (!obj_datasec (abfd)->user_set_vma)
1009 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size;
1010 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1012 if (abdp && abdp->zmagic_mapped_contiguous)
1014 asection * text = obj_textsec (abfd);
1015 asection * data = obj_datasec (abfd);
1017 text_pad = data->vma - (text->vma + text->size);
1018 /* Only pad the text section if the data
1019 section is going to be placed after it. */
1021 text->size += text_pad;
1023 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1024 + obj_textsec (abfd)->size);
1026 /* Fix up exec header while we're at it. */
1027 execp->a_text = obj_textsec (abfd)->size;
1028 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1029 execp->a_text += adata (abfd).exec_bytes_size;
1030 if (obj_aout_subformat (abfd) == q_magic_format)
1031 N_SET_MAGIC (*execp, QMAGIC);
1033 N_SET_MAGIC (*execp, ZMAGIC);
1035 /* Spec says data section should be rounded up to page boundary. */
1036 obj_datasec (abfd)->size
1037 = align_power (obj_datasec (abfd)->size,
1038 obj_bsssec (abfd)->alignment_power);
1039 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size,
1040 adata (abfd).page_size);
1041 data_pad = execp->a_data - obj_datasec (abfd)->size;
1044 if (!obj_bsssec (abfd)->user_set_vma)
1045 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1046 + obj_datasec (abfd)->size);
1047 /* If the BSS immediately follows the data section and extra space
1048 in the page is left after the data section, fudge data
1049 in the header so that the bss section looks smaller by that
1050 amount. We'll start the bss section there, and lie to the OS.
1051 (Note that a linker script, as well as the above assignment,
1052 could have explicitly set the BSS vma to immediately follow
1053 the data section.) */
1054 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1055 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size)
1056 execp->a_bss = (data_pad > obj_bsssec (abfd)->size
1057 ? 0 : obj_bsssec (abfd)->size - data_pad);
1059 execp->a_bss = obj_bsssec (abfd)->size;
1063 adjust_n_magic (bfd *abfd, struct internal_exec *execp)
1065 file_ptr pos = adata (abfd).exec_bytes_size;
1070 obj_textsec (abfd)->filepos = pos;
1071 if (!obj_textsec (abfd)->user_set_vma)
1072 obj_textsec (abfd)->vma = vma;
1074 vma = obj_textsec (abfd)->vma;
1075 pos += obj_textsec (abfd)->size;
1076 vma += obj_textsec (abfd)->size;
1079 obj_datasec (abfd)->filepos = pos;
1080 if (!obj_datasec (abfd)->user_set_vma)
1081 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1082 vma = obj_datasec (abfd)->vma;
1084 /* Since BSS follows data immediately, see if it needs alignment. */
1085 vma += obj_datasec (abfd)->size;
1086 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1087 obj_datasec (abfd)->size += pad;
1088 pos += obj_datasec (abfd)->size;
1091 if (!obj_bsssec (abfd)->user_set_vma)
1092 obj_bsssec (abfd)->vma = vma;
1094 vma = obj_bsssec (abfd)->vma;
1096 /* Fix up exec header. */
1097 execp->a_text = obj_textsec (abfd)->size;
1098 execp->a_data = obj_datasec (abfd)->size;
1099 execp->a_bss = obj_bsssec (abfd)->size;
1100 N_SET_MAGIC (*execp, NMAGIC);
1104 NAME (aout, adjust_sizes_and_vmas) (bfd *abfd,
1105 bfd_size_type *text_size,
1106 file_ptr *text_end ATTRIBUTE_UNUSED)
1108 struct internal_exec *execp = exec_hdr (abfd);
1110 if (! NAME (aout, make_sections) (abfd))
1113 if (adata (abfd).magic != undecided_magic)
1116 obj_textsec (abfd)->size =
1117 align_power (obj_textsec (abfd)->size,
1118 obj_textsec (abfd)->alignment_power);
1120 *text_size = obj_textsec (abfd)->size;
1121 /* Rule (heuristic) for when to pad to a new page. Note that there
1122 are (at least) two ways demand-paged (ZMAGIC) files have been
1123 handled. Most Berkeley-based systems start the text segment at
1124 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1125 segment right after the exec header; the latter is counted in the
1126 text segment size, and is paged in by the kernel with the rest of
1129 /* This perhaps isn't the right way to do this, but made it simpler for me
1130 to understand enough to implement it. Better would probably be to go
1131 right from BFD flags to alignment/positioning characteristics. But the
1132 old code was sloppy enough about handling the flags, and had enough
1133 other magic, that it was a little hard for me to understand. I think
1134 I understand it better now, but I haven't time to do the cleanup this
1137 if (abfd->flags & D_PAGED)
1138 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1139 adata (abfd).magic = z_magic;
1140 else if (abfd->flags & WP_TEXT)
1141 adata (abfd).magic = n_magic;
1143 adata (abfd).magic = o_magic;
1145 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1147 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1149 switch (adata (abfd).magic)
1151 case n_magic: str = "NMAGIC"; break;
1152 case o_magic: str = "OMAGIC"; break;
1153 case z_magic: str = "ZMAGIC"; break;
1158 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1159 obj_textsec (abfd)->alignment_power,
1160 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1161 obj_datasec (abfd)->alignment_power,
1162 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size,
1163 obj_bsssec (abfd)->alignment_power);
1167 switch (adata (abfd).magic)
1170 adjust_o_magic (abfd, execp);
1173 adjust_z_magic (abfd, execp);
1176 adjust_n_magic (abfd, execp);
1182 #ifdef BFD_AOUT_DEBUG
1183 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1184 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1185 obj_textsec (abfd)->filepos,
1186 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1187 obj_datasec (abfd)->filepos,
1188 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size);
1196 aout_@var{size}_new_section_hook
1199 bfd_boolean aout_@var{size}_new_section_hook,
1204 Called by the BFD in response to a @code{bfd_make_section}
1208 NAME (aout, new_section_hook) (bfd *abfd, asection *newsect)
1210 /* Align to double at least. */
1211 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
1213 if (bfd_get_format (abfd) == bfd_object)
1215 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1217 obj_textsec (abfd)= newsect;
1218 newsect->target_index = N_TEXT;
1220 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1222 obj_datasec (abfd) = newsect;
1223 newsect->target_index = N_DATA;
1225 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1227 obj_bsssec (abfd) = newsect;
1228 newsect->target_index = N_BSS;
1232 /* We allow more than three sections internally. */
1233 return _bfd_generic_new_section_hook (abfd, newsect);
1237 NAME (aout, set_section_contents) (bfd *abfd,
1239 const void * location,
1241 bfd_size_type count)
1244 bfd_size_type text_size;
1246 if (! abfd->output_has_begun)
1248 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1252 if (section == obj_bsssec (abfd))
1254 bfd_set_error (bfd_error_no_contents);
1258 if (section != obj_textsec (abfd)
1259 && section != obj_datasec (abfd))
1261 if (aout_section_merge_with_text_p (abfd, section))
1262 section->filepos = obj_textsec (abfd)->filepos +
1263 (section->vma - obj_textsec (abfd)->vma);
1266 (*_bfd_error_handler)
1267 (_("%s: can not represent section `%s' in a.out object file format"),
1268 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1269 bfd_set_error (bfd_error_nonrepresentable_section);
1276 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1277 || bfd_bwrite (location, count, abfd) != count)
1284 /* Read the external symbols from an a.out file. */
1287 aout_get_external_symbols (bfd *abfd)
1289 if (obj_aout_external_syms (abfd) == NULL)
1291 bfd_size_type count;
1292 struct external_nlist *syms;
1295 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1298 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
1299 exec_hdr (abfd)->a_syms,
1300 &obj_aout_sym_window (abfd), TRUE))
1302 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1304 /* We allocate using malloc to make the values easy to free
1305 later on. If we put them on the objalloc it might not be
1306 possible to free them. */
1307 syms = bfd_malloc (count * EXTERNAL_NLIST_SIZE);
1308 if (syms == NULL && count != 0)
1311 amt = exec_hdr (abfd)->a_syms;
1312 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1313 || bfd_bread (syms, amt, abfd) != amt)
1320 obj_aout_external_syms (abfd) = syms;
1321 obj_aout_external_sym_count (abfd) = count;
1324 if (obj_aout_external_strings (abfd) == NULL
1325 && exec_hdr (abfd)->a_syms != 0)
1327 unsigned char string_chars[BYTES_IN_WORD];
1328 bfd_size_type stringsize;
1330 bfd_size_type amt = BYTES_IN_WORD;
1332 /* Get the size of the strings. */
1333 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1334 || bfd_bread ((void *) string_chars, amt, abfd) != amt)
1336 stringsize = GET_WORD (abfd, string_chars);
1339 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1340 &obj_aout_string_window (abfd), TRUE))
1342 strings = (char *) obj_aout_string_window (abfd).data;
1344 strings = bfd_malloc (stringsize + 1);
1345 if (strings == NULL)
1348 /* Skip space for the string count in the buffer for convenience
1349 when using indexes. */
1350 amt = stringsize - BYTES_IN_WORD;
1351 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1358 /* Ensure that a zero index yields an empty string. */
1361 strings[stringsize - 1] = 0;
1363 obj_aout_external_strings (abfd) = strings;
1364 obj_aout_external_string_size (abfd) = stringsize;
1370 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1371 and symbol->value fields of CACHE_PTR will be set from the a.out
1372 nlist structure. This function is responsible for setting
1373 symbol->flags and symbol->section, and adjusting symbol->value. */
1376 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1380 if ((cache_ptr->type & N_STAB) != 0
1381 || cache_ptr->type == N_FN)
1385 /* This is a debugging symbol. */
1386 cache_ptr->symbol.flags = BSF_DEBUGGING;
1388 /* Work out the symbol section. */
1389 switch (cache_ptr->type & N_TYPE)
1393 sec = obj_textsec (abfd);
1396 sec = obj_datasec (abfd);
1399 sec = obj_bsssec (abfd);
1403 sec = bfd_abs_section_ptr;
1407 cache_ptr->symbol.section = sec;
1408 cache_ptr->symbol.value -= sec->vma;
1413 /* Get the default visibility. This does not apply to all types, so
1414 we just hold it in a local variable to use if wanted. */
1415 if ((cache_ptr->type & N_EXT) == 0)
1416 visible = BSF_LOCAL;
1418 visible = BSF_GLOBAL;
1420 switch (cache_ptr->type)
1423 case N_ABS: case N_ABS | N_EXT:
1424 cache_ptr->symbol.section = bfd_abs_section_ptr;
1425 cache_ptr->symbol.flags = visible;
1428 case N_UNDF | N_EXT:
1429 if (cache_ptr->symbol.value != 0)
1431 /* This is a common symbol. */
1432 cache_ptr->symbol.flags = BSF_GLOBAL;
1433 cache_ptr->symbol.section = bfd_com_section_ptr;
1437 cache_ptr->symbol.flags = 0;
1438 cache_ptr->symbol.section = bfd_und_section_ptr;
1442 case N_TEXT: case N_TEXT | N_EXT:
1443 cache_ptr->symbol.section = obj_textsec (abfd);
1444 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1445 cache_ptr->symbol.flags = visible;
1448 /* N_SETV symbols used to represent set vectors placed in the
1449 data section. They are no longer generated. Theoretically,
1450 it was possible to extract the entries and combine them with
1451 new ones, although I don't know if that was ever actually
1452 done. Unless that feature is restored, treat them as data
1454 case N_SETV: case N_SETV | N_EXT:
1455 case N_DATA: case N_DATA | N_EXT:
1456 cache_ptr->symbol.section = obj_datasec (abfd);
1457 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1458 cache_ptr->symbol.flags = visible;
1461 case N_BSS: case N_BSS | N_EXT:
1462 cache_ptr->symbol.section = obj_bsssec (abfd);
1463 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1464 cache_ptr->symbol.flags = visible;
1467 case N_SETA: case N_SETA | N_EXT:
1468 case N_SETT: case N_SETT | N_EXT:
1469 case N_SETD: case N_SETD | N_EXT:
1470 case N_SETB: case N_SETB | N_EXT:
1472 /* This code is no longer needed. It used to be used to make
1473 the linker handle set symbols, but they are now handled in
1474 the add_symbols routine instead. */
1475 switch (cache_ptr->type & N_TYPE)
1478 cache_ptr->symbol.section = bfd_abs_section_ptr;
1481 cache_ptr->symbol.section = obj_textsec (abfd);
1484 cache_ptr->symbol.section = obj_datasec (abfd);
1487 cache_ptr->symbol.section = obj_bsssec (abfd);
1491 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1496 /* This symbol is the text of a warning message. The next
1497 symbol is the symbol to associate the warning with. If a
1498 reference is made to that symbol, a warning is issued. */
1499 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1500 cache_ptr->symbol.section = bfd_abs_section_ptr;
1503 case N_INDR: case N_INDR | N_EXT:
1504 /* An indirect symbol. This consists of two symbols in a row.
1505 The first symbol is the name of the indirection. The second
1506 symbol is the name of the target. A reference to the first
1507 symbol becomes a reference to the second. */
1508 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1509 cache_ptr->symbol.section = bfd_ind_section_ptr;
1513 cache_ptr->symbol.section = bfd_und_section_ptr;
1514 cache_ptr->symbol.flags = BSF_WEAK;
1518 cache_ptr->symbol.section = bfd_abs_section_ptr;
1519 cache_ptr->symbol.flags = BSF_WEAK;
1523 cache_ptr->symbol.section = obj_textsec (abfd);
1524 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1525 cache_ptr->symbol.flags = BSF_WEAK;
1529 cache_ptr->symbol.section = obj_datasec (abfd);
1530 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1531 cache_ptr->symbol.flags = BSF_WEAK;
1535 cache_ptr->symbol.section = obj_bsssec (abfd);
1536 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1537 cache_ptr->symbol.flags = BSF_WEAK;
1544 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1547 translate_to_native_sym_flags (bfd *abfd,
1549 struct external_nlist *sym_pointer)
1551 bfd_vma value = cache_ptr->value;
1555 /* Mask out any existing type bits in case copying from one section
1557 sym_pointer->e_type[0] &= ~N_TYPE;
1559 sec = bfd_get_section (cache_ptr);
1564 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1566 (*_bfd_error_handler)
1567 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1568 bfd_get_filename (abfd),
1569 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1570 bfd_set_error (bfd_error_nonrepresentable_section);
1574 if (sec->output_section != NULL)
1576 off = sec->output_offset;
1577 sec = sec->output_section;
1580 if (bfd_is_abs_section (sec))
1581 sym_pointer->e_type[0] |= N_ABS;
1582 else if (sec == obj_textsec (abfd))
1583 sym_pointer->e_type[0] |= N_TEXT;
1584 else if (sec == obj_datasec (abfd))
1585 sym_pointer->e_type[0] |= N_DATA;
1586 else if (sec == obj_bsssec (abfd))
1587 sym_pointer->e_type[0] |= N_BSS;
1588 else if (bfd_is_und_section (sec))
1589 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1590 else if (bfd_is_ind_section (sec))
1591 sym_pointer->e_type[0] = N_INDR;
1592 else if (bfd_is_com_section (sec))
1593 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1596 if (aout_section_merge_with_text_p (abfd, sec))
1597 sym_pointer->e_type[0] |= N_TEXT;
1600 (*_bfd_error_handler)
1601 (_("%s: can not represent section `%s' in a.out object file format"),
1602 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1603 bfd_set_error (bfd_error_nonrepresentable_section);
1608 /* Turn the symbol from section relative to absolute again. */
1609 value += sec->vma + off;
1611 if ((cache_ptr->flags & BSF_WARNING) != 0)
1612 sym_pointer->e_type[0] = N_WARNING;
1614 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1615 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1616 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1617 sym_pointer->e_type[0] |= N_EXT;
1618 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1619 sym_pointer->e_type[0] &= ~N_EXT;
1621 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1623 int type = ((aout_symbol_type *) cache_ptr)->type;
1627 case N_ABS: type = N_SETA; break;
1628 case N_TEXT: type = N_SETT; break;
1629 case N_DATA: type = N_SETD; break;
1630 case N_BSS: type = N_SETB; break;
1632 sym_pointer->e_type[0] = type;
1635 if ((cache_ptr->flags & BSF_WEAK) != 0)
1639 switch (sym_pointer->e_type[0] & N_TYPE)
1642 case N_ABS: type = N_WEAKA; break;
1643 case N_TEXT: type = N_WEAKT; break;
1644 case N_DATA: type = N_WEAKD; break;
1645 case N_BSS: type = N_WEAKB; break;
1646 case N_UNDF: type = N_WEAKU; break;
1648 sym_pointer->e_type[0] = type;
1651 PUT_WORD (abfd, value, sym_pointer->e_value);
1656 /* Native-level interface to symbols. */
1659 NAME (aout, make_empty_symbol) (bfd *abfd)
1661 bfd_size_type amt = sizeof (aout_symbol_type);
1663 aout_symbol_type *new = bfd_zalloc (abfd, amt);
1666 new->symbol.the_bfd = abfd;
1668 return &new->symbol;
1671 /* Translate a set of internal symbols into external symbols. */
1674 NAME (aout, translate_symbol_table) (bfd *abfd,
1675 aout_symbol_type *in,
1676 struct external_nlist *ext,
1677 bfd_size_type count,
1679 bfd_size_type strsize,
1680 bfd_boolean dynamic)
1682 struct external_nlist *ext_end;
1684 ext_end = ext + count;
1685 for (; ext < ext_end; ext++, in++)
1689 x = GET_WORD (abfd, ext->e_strx);
1690 in->symbol.the_bfd = abfd;
1692 /* For the normal symbols, the zero index points at the number
1693 of bytes in the string table but is to be interpreted as the
1694 null string. For the dynamic symbols, the number of bytes in
1695 the string table is stored in the __DYNAMIC structure and the
1696 zero index points at an actual string. */
1697 if (x == 0 && ! dynamic)
1698 in->symbol.name = "";
1699 else if (x < strsize)
1700 in->symbol.name = str + x;
1704 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1705 in->desc = H_GET_16 (abfd, ext->e_desc);
1706 in->other = H_GET_8 (abfd, ext->e_other);
1707 in->type = H_GET_8 (abfd, ext->e_type);
1708 in->symbol.udata.p = NULL;
1710 if (! translate_from_native_sym_flags (abfd, in))
1714 in->symbol.flags |= BSF_DYNAMIC;
1720 /* We read the symbols into a buffer, which is discarded when this
1721 function exits. We read the strings into a buffer large enough to
1722 hold them all plus all the cached symbol entries. */
1725 NAME (aout, slurp_symbol_table) (bfd *abfd)
1727 struct external_nlist *old_external_syms;
1728 aout_symbol_type *cached;
1729 bfd_size_type cached_size;
1731 /* If there's no work to be done, don't do any. */
1732 if (obj_aout_symbols (abfd) != NULL)
1735 old_external_syms = obj_aout_external_syms (abfd);
1737 if (! aout_get_external_symbols (abfd))
1740 cached_size = obj_aout_external_sym_count (abfd);
1741 cached_size *= sizeof (aout_symbol_type);
1742 cached = bfd_zmalloc (cached_size);
1743 if (cached == NULL && cached_size != 0)
1746 /* Convert from external symbol information to internal. */
1747 if (! (NAME (aout, translate_symbol_table)
1749 obj_aout_external_syms (abfd),
1750 obj_aout_external_sym_count (abfd),
1751 obj_aout_external_strings (abfd),
1752 obj_aout_external_string_size (abfd),
1759 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1761 obj_aout_symbols (abfd) = cached;
1763 /* It is very likely that anybody who calls this function will not
1764 want the external symbol information, so if it was allocated
1765 because of our call to aout_get_external_symbols, we free it up
1766 right away to save space. */
1767 if (old_external_syms == NULL
1768 && obj_aout_external_syms (abfd) != NULL)
1771 bfd_free_window (&obj_aout_sym_window (abfd));
1773 free (obj_aout_external_syms (abfd));
1775 obj_aout_external_syms (abfd) = NULL;
1781 /* We use a hash table when writing out symbols so that we only write
1782 out a particular string once. This helps particularly when the
1783 linker writes out stabs debugging entries, because each different
1784 contributing object file tends to have many duplicate stabs
1787 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1788 if BFD_TRADITIONAL_FORMAT is set. */
1790 /* Get the index of a string in a strtab, adding it if it is not
1793 static inline bfd_size_type
1794 add_to_stringtab (bfd *abfd,
1795 struct bfd_strtab_hash *tab,
1800 bfd_size_type index;
1802 /* An index of 0 always means the empty string. */
1803 if (str == 0 || *str == '\0')
1806 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1807 doesn't understand a hashed string table. */
1809 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1812 index = _bfd_stringtab_add (tab, str, hash, copy);
1814 if (index != (bfd_size_type) -1)
1815 /* Add BYTES_IN_WORD to the return value to account for the
1816 space taken up by the string table size. */
1817 index += BYTES_IN_WORD;
1822 /* Write out a strtab. ABFD is already at the right location in the
1826 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1828 bfd_byte buffer[BYTES_IN_WORD];
1829 bfd_size_type amt = BYTES_IN_WORD;
1831 /* The string table starts with the size. */
1832 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1833 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1836 return _bfd_stringtab_emit (abfd, tab);
1840 NAME (aout, write_syms) (bfd *abfd)
1842 unsigned int count ;
1843 asymbol **generic = bfd_get_outsymbols (abfd);
1844 struct bfd_strtab_hash *strtab;
1846 strtab = _bfd_stringtab_init ();
1850 for (count = 0; count < bfd_get_symcount (abfd); count++)
1852 asymbol *g = generic[count];
1854 struct external_nlist nsp;
1857 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1858 if (indx == (bfd_size_type) -1)
1860 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1862 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1864 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1865 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1866 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1870 H_PUT_16 (abfd, 0, nsp.e_desc);
1871 H_PUT_8 (abfd, 0, nsp.e_other);
1872 H_PUT_8 (abfd, 0, nsp.e_type);
1875 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1878 amt = EXTERNAL_NLIST_SIZE;
1879 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1882 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1883 here, at the end. */
1887 if (! emit_stringtab (abfd, strtab))
1890 _bfd_stringtab_free (strtab);
1895 _bfd_stringtab_free (strtab);
1900 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1902 unsigned int counter = 0;
1903 aout_symbol_type *symbase;
1905 if (!NAME (aout, slurp_symbol_table) (abfd))
1908 for (symbase = obj_aout_symbols (abfd);
1909 counter++ < bfd_get_symcount (abfd);
1911 *(location++) = (asymbol *) (symbase++);
1913 return bfd_get_symcount (abfd);
1916 /* Standard reloc stuff. */
1917 /* Output standard relocation information to a file in target byte order. */
1919 extern void NAME (aout, swap_std_reloc_out)
1920 (bfd *, arelent *, struct reloc_std_external *);
1923 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1925 struct reloc_std_external *natptr)
1928 asymbol *sym = *(g->sym_ptr_ptr);
1930 unsigned int r_length;
1932 int r_baserel, r_jmptable, r_relative;
1933 asection *output_section = sym->section->output_section;
1935 PUT_WORD (abfd, g->address, natptr->r_address);
1937 r_length = g->howto->size ; /* Size as a power of two. */
1938 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1939 /* XXX This relies on relocs coming from a.out files. */
1940 r_baserel = (g->howto->type & 8) != 0;
1941 r_jmptable = (g->howto->type & 16) != 0;
1942 r_relative = (g->howto->type & 32) != 0;
1944 /* Name was clobbered by aout_write_syms to be symbol index. */
1946 /* If this relocation is relative to a symbol then set the
1947 r_index to the symbols index, and the r_extern bit.
1949 Absolute symbols can come in in two ways, either as an offset
1950 from the abs section, or as a symbol which has an abs value.
1951 check for that here. */
1953 if (bfd_is_com_section (output_section)
1954 || bfd_is_abs_section (output_section)
1955 || bfd_is_und_section (output_section))
1957 if (bfd_abs_section_ptr->symbol == sym)
1959 /* Whoops, looked like an abs symbol, but is
1960 really an offset from the abs section. */
1966 /* Fill in symbol. */
1968 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1973 /* Just an ordinary section. */
1975 r_index = output_section->target_index;
1978 /* Now the fun stuff. */
1979 if (bfd_header_big_endian (abfd))
1981 natptr->r_index[0] = r_index >> 16;
1982 natptr->r_index[1] = r_index >> 8;
1983 natptr->r_index[2] = r_index;
1984 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
1985 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
1986 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
1987 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
1988 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
1989 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
1993 natptr->r_index[2] = r_index >> 16;
1994 natptr->r_index[1] = r_index >> 8;
1995 natptr->r_index[0] = r_index;
1996 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
1997 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
1998 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
1999 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2000 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2001 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2005 /* Extended stuff. */
2006 /* Output extended relocation information to a file in target byte order. */
2008 extern void NAME (aout, swap_ext_reloc_out)
2009 (bfd *, arelent *, struct reloc_ext_external *);
2012 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2014 struct reloc_ext_external *natptr)
2018 unsigned int r_type;
2020 asymbol *sym = *(g->sym_ptr_ptr);
2021 asection *output_section = sym->section->output_section;
2023 PUT_WORD (abfd, g->address, natptr->r_address);
2025 r_type = (unsigned int) g->howto->type;
2027 r_addend = g->addend;
2028 if ((sym->flags & BSF_SECTION_SYM) != 0)
2029 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2031 /* If this relocation is relative to a symbol then set the
2032 r_index to the symbols index, and the r_extern bit.
2034 Absolute symbols can come in in two ways, either as an offset
2035 from the abs section, or as a symbol which has an abs value.
2036 check for that here. */
2037 if (bfd_is_abs_section (bfd_get_section (sym)))
2042 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2044 if (bfd_is_und_section (bfd_get_section (sym))
2045 || (sym->flags & BSF_GLOBAL) != 0)
2049 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2053 /* Just an ordinary section. */
2055 r_index = output_section->target_index;
2058 /* Now the fun stuff. */
2059 if (bfd_header_big_endian (abfd))
2061 natptr->r_index[0] = r_index >> 16;
2062 natptr->r_index[1] = r_index >> 8;
2063 natptr->r_index[2] = r_index;
2064 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2065 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2069 natptr->r_index[2] = r_index >> 16;
2070 natptr->r_index[1] = r_index >> 8;
2071 natptr->r_index[0] = r_index;
2072 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2073 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2076 PUT_WORD (abfd, r_addend, natptr->r_addend);
2079 /* BFD deals internally with all things based from the section they're
2080 in. so, something in 10 bytes into a text section with a base of
2081 50 would have a symbol (.text+10) and know .text vma was 50.
2083 Aout keeps all it's symbols based from zero, so the symbol would
2084 contain 60. This macro subs the base of each section from the value
2085 to give the true offset from the section. */
2087 #define MOVE_ADDRESS(ad) \
2090 /* Undefined symbol. */ \
2091 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2092 cache_ptr->addend = ad; \
2096 /* Defined, section relative. Replace symbol with pointer to \
2097 symbol which points to section. */ \
2101 case N_TEXT | N_EXT: \
2102 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2103 cache_ptr->addend = ad - su->textsec->vma; \
2106 case N_DATA | N_EXT: \
2107 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2108 cache_ptr->addend = ad - su->datasec->vma; \
2111 case N_BSS | N_EXT: \
2112 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2113 cache_ptr->addend = ad - su->bsssec->vma; \
2117 case N_ABS | N_EXT: \
2118 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2119 cache_ptr->addend = ad; \
2125 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2126 struct reloc_ext_external *bytes,
2129 bfd_size_type symcount)
2131 unsigned int r_index;
2133 unsigned int r_type;
2134 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2136 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2138 /* Now the fun stuff. */
2139 if (bfd_header_big_endian (abfd))
2141 r_index = (((unsigned int) bytes->r_index[0] << 16)
2142 | ((unsigned int) bytes->r_index[1] << 8)
2143 | bytes->r_index[2]);
2144 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2145 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2146 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2150 r_index = (((unsigned int) bytes->r_index[2] << 16)
2151 | ((unsigned int) bytes->r_index[1] << 8)
2152 | bytes->r_index[0]);
2153 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2154 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2155 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2158 cache_ptr->howto = howto_table_ext + r_type;
2160 /* Base relative relocs are always against the symbol table,
2161 regardless of the setting of r_extern. r_extern just reflects
2162 whether the symbol the reloc is against is local or global. */
2163 if (r_type == (unsigned int) RELOC_BASE10
2164 || r_type == (unsigned int) RELOC_BASE13
2165 || r_type == (unsigned int) RELOC_BASE22)
2168 if (r_extern && r_index > symcount)
2170 /* We could arrange to return an error, but it might be useful
2171 to see the file even if it is bad. */
2176 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2180 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2181 struct reloc_std_external *bytes,
2184 bfd_size_type symcount)
2186 unsigned int r_index;
2188 unsigned int r_length;
2190 int r_baserel, r_jmptable, r_relative;
2191 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2192 unsigned int howto_idx;
2194 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2196 /* Now the fun stuff. */
2197 if (bfd_header_big_endian (abfd))
2199 r_index = (((unsigned int) bytes->r_index[0] << 16)
2200 | ((unsigned int) bytes->r_index[1] << 8)
2201 | bytes->r_index[2]);
2202 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2203 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2204 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2205 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2206 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2207 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2208 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2212 r_index = (((unsigned int) bytes->r_index[2] << 16)
2213 | ((unsigned int) bytes->r_index[1] << 8)
2214 | bytes->r_index[0]);
2215 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2216 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2217 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2218 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2219 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2220 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2221 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2224 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2225 + 16 * r_jmptable + 32 * r_relative);
2226 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2227 cache_ptr->howto = howto_table_std + howto_idx;
2228 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2230 /* Base relative relocs are always against the symbol table,
2231 regardless of the setting of r_extern. r_extern just reflects
2232 whether the symbol the reloc is against is local or global. */
2236 if (r_extern && r_index > symcount)
2238 /* We could arrange to return an error, but it might be useful
2239 to see the file even if it is bad. */
2247 /* Read and swap the relocs for a section. */
2250 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2252 bfd_size_type count;
2253 bfd_size_type reloc_size;
2255 arelent *reloc_cache;
2257 unsigned int counter = 0;
2261 if (asect->relocation)
2264 if (asect->flags & SEC_CONSTRUCTOR)
2267 if (asect == obj_datasec (abfd))
2268 reloc_size = exec_hdr (abfd)->a_drsize;
2269 else if (asect == obj_textsec (abfd))
2270 reloc_size = exec_hdr (abfd)->a_trsize;
2271 else if (asect == obj_bsssec (abfd))
2275 bfd_set_error (bfd_error_invalid_operation);
2279 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2282 each_size = obj_reloc_entry_size (abfd);
2284 count = reloc_size / each_size;
2286 amt = count * sizeof (arelent);
2287 reloc_cache = bfd_zmalloc (amt);
2288 if (reloc_cache == NULL && count != 0)
2291 relocs = bfd_malloc (reloc_size);
2292 if (relocs == NULL && reloc_size != 0)
2298 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2305 cache_ptr = reloc_cache;
2306 if (each_size == RELOC_EXT_SIZE)
2308 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2310 for (; counter < count; counter++, rptr++, cache_ptr++)
2311 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2312 (bfd_size_type) bfd_get_symcount (abfd));
2316 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2318 for (; counter < count; counter++, rptr++, cache_ptr++)
2319 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2320 (bfd_size_type) bfd_get_symcount (abfd));
2325 asect->relocation = reloc_cache;
2326 asect->reloc_count = cache_ptr - reloc_cache;
2331 /* Write out a relocation section into an object file. */
2334 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2337 unsigned char *native, *natptr;
2340 unsigned int count = section->reloc_count;
2341 bfd_size_type natsize;
2343 if (count == 0 || section->orelocation == NULL)
2346 each_size = obj_reloc_entry_size (abfd);
2347 natsize = (bfd_size_type) each_size * count;
2348 native = bfd_zalloc (abfd, natsize);
2352 generic = section->orelocation;
2354 if (each_size == RELOC_EXT_SIZE)
2356 for (natptr = native;
2358 --count, natptr += each_size, ++generic)
2359 MY_swap_ext_reloc_out (abfd, *generic,
2360 (struct reloc_ext_external *) natptr);
2364 for (natptr = native;
2366 --count, natptr += each_size, ++generic)
2367 MY_swap_std_reloc_out (abfd, *generic,
2368 (struct reloc_std_external *) natptr);
2371 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2373 bfd_release (abfd, native);
2376 bfd_release (abfd, native);
2381 /* This is stupid. This function should be a boolean predicate. */
2384 NAME (aout, canonicalize_reloc) (bfd *abfd,
2389 arelent *tblptr = section->relocation;
2392 if (section == obj_bsssec (abfd))
2398 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2401 if (section->flags & SEC_CONSTRUCTOR)
2403 arelent_chain *chain = section->constructor_chain;
2404 for (count = 0; count < section->reloc_count; count ++)
2406 *relptr ++ = &chain->relent;
2407 chain = chain->next;
2412 tblptr = section->relocation;
2414 for (count = 0; count++ < section->reloc_count; )
2416 *relptr++ = tblptr++;
2421 return section->reloc_count;
2425 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2427 if (bfd_get_format (abfd) != bfd_object)
2429 bfd_set_error (bfd_error_invalid_operation);
2433 if (asect->flags & SEC_CONSTRUCTOR)
2434 return sizeof (arelent *) * (asect->reloc_count + 1);
2436 if (asect == obj_datasec (abfd))
2437 return sizeof (arelent *)
2438 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2441 if (asect == obj_textsec (abfd))
2442 return sizeof (arelent *)
2443 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2446 if (asect == obj_bsssec (abfd))
2447 return sizeof (arelent *);
2449 if (asect == obj_bsssec (abfd))
2452 bfd_set_error (bfd_error_invalid_operation);
2457 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2459 if (!NAME (aout, slurp_symbol_table) (abfd))
2462 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2466 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2467 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2473 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2477 bfd_symbol_info (symbol, ret);
2479 if (ret->type == '?')
2481 int type_code = aout_symbol (symbol)->type & 0xff;
2482 const char *stab_name = bfd_get_stab_name (type_code);
2483 static char buf[10];
2485 if (stab_name == NULL)
2487 sprintf (buf, "(%d)", type_code);
2491 ret->stab_type = type_code;
2492 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2493 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2494 ret->stab_name = stab_name;
2499 NAME (aout, print_symbol) (bfd *abfd,
2502 bfd_print_symbol_type how)
2504 FILE *file = (FILE *)afile;
2508 case bfd_print_symbol_name:
2510 fprintf (file,"%s", symbol->name);
2512 case bfd_print_symbol_more:
2513 fprintf (file,"%4x %2x %2x",
2514 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2515 (unsigned) (aout_symbol (symbol)->other & 0xff),
2516 (unsigned) (aout_symbol (symbol)->type));
2518 case bfd_print_symbol_all:
2520 const char *section_name = symbol->section->name;
2522 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2524 fprintf (file," %-5s %04x %02x %02x",
2526 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2527 (unsigned) (aout_symbol (symbol)->other & 0xff),
2528 (unsigned) (aout_symbol (symbol)->type & 0xff));
2530 fprintf (file," %s", symbol->name);
2536 /* If we don't have to allocate more than 1MB to hold the generic
2537 symbols, we use the generic minisymbol methord: it's faster, since
2538 it only translates the symbols once, not multiple times. */
2539 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2541 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2542 symbols. The minisymbol_to_symbol function translates these into
2543 BFD asymbol structures. */
2546 NAME (aout, read_minisymbols) (bfd *abfd,
2547 bfd_boolean dynamic,
2549 unsigned int *sizep)
2552 /* We could handle the dynamic symbols here as well, but it's
2553 easier to hand them off. */
2554 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2556 if (! aout_get_external_symbols (abfd))
2559 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2560 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2562 *minisymsp = (void *) obj_aout_external_syms (abfd);
2564 /* By passing the external symbols back from this routine, we are
2565 giving up control over the memory block. Clear
2566 obj_aout_external_syms, so that we do not try to free it
2568 obj_aout_external_syms (abfd) = NULL;
2570 *sizep = EXTERNAL_NLIST_SIZE;
2571 return obj_aout_external_sym_count (abfd);
2574 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2575 unmodified a.out symbol. The SYM argument is a structure returned
2576 by bfd_make_empty_symbol, which we fill in here. */
2579 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2580 bfd_boolean dynamic,
2581 const void * minisym,
2585 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2586 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2588 memset (sym, 0, sizeof (aout_symbol_type));
2590 /* We call translate_symbol_table to translate a single symbol. */
2591 if (! (NAME (aout, translate_symbol_table)
2593 (aout_symbol_type *) sym,
2594 (struct external_nlist *) minisym,
2596 obj_aout_external_strings (abfd),
2597 obj_aout_external_string_size (abfd),
2604 /* Provided a BFD, a section and an offset into the section, calculate
2605 and return the name of the source file and the line nearest to the
2609 NAME (aout, find_nearest_line) (bfd *abfd,
2613 const char **filename_ptr,
2614 const char **functionname_ptr,
2615 unsigned int *line_ptr)
2617 /* Run down the file looking for the filename, function and linenumber. */
2619 const char *directory_name = NULL;
2620 const char *main_file_name = NULL;
2621 const char *current_file_name = NULL;
2622 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2623 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2624 bfd_vma low_line_vma = 0;
2625 bfd_vma low_func_vma = 0;
2627 bfd_size_type filelen, funclen;
2630 *filename_ptr = abfd->filename;
2631 *functionname_ptr = 0;
2634 if (symbols != NULL)
2636 for (p = symbols; *p; p++)
2638 aout_symbol_type *q = (aout_symbol_type *) (*p);
2643 /* If this looks like a file name symbol, and it comes after
2644 the line number we have found so far, but before the
2645 offset, then we have probably not found the right line
2647 if (q->symbol.value <= offset
2648 && ((q->symbol.value > low_line_vma
2649 && (line_file_name != NULL
2651 || (q->symbol.value > low_func_vma
2654 const char *symname;
2656 symname = q->symbol.name;
2657 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2659 if (q->symbol.value > low_line_vma)
2662 line_file_name = NULL;
2664 if (q->symbol.value > low_func_vma)
2671 /* If this symbol is less than the offset, but greater than
2672 the line number we have found so far, then we have not
2673 found the right line number. */
2674 if (q->symbol.value <= offset)
2676 if (q->symbol.value > low_line_vma)
2679 line_file_name = NULL;
2681 if (q->symbol.value > low_func_vma)
2685 main_file_name = current_file_name = q->symbol.name;
2686 /* Look ahead to next symbol to check if that too is an N_SO. */
2690 q = (aout_symbol_type *) (*p);
2691 if (q->type != (int)N_SO)
2694 /* Found a second N_SO First is directory; second is filename. */
2695 directory_name = current_file_name;
2696 main_file_name = current_file_name = q->symbol.name;
2697 if (obj_textsec (abfd) != section)
2701 current_file_name = q->symbol.name;
2708 /* We'll keep this if it resolves nearer than the one we have
2710 if (q->symbol.value >= low_line_vma
2711 && q->symbol.value <= offset)
2713 *line_ptr = q->desc;
2714 low_line_vma = q->symbol.value;
2715 line_file_name = current_file_name;
2716 line_directory_name = directory_name;
2721 /* We'll keep this if it is nearer than the one we have already. */
2722 if (q->symbol.value >= low_func_vma &&
2723 q->symbol.value <= offset)
2725 low_func_vma = q->symbol.value;
2726 func = (asymbol *)q;
2728 else if (q->symbol.value > offset)
2739 main_file_name = line_file_name;
2740 directory_name = line_directory_name;
2743 if (main_file_name == NULL
2744 || IS_ABSOLUTE_PATH (main_file_name)
2745 || directory_name == NULL)
2748 filelen = strlen (directory_name) + strlen (main_file_name);
2753 funclen = strlen (bfd_asymbol_name (func));
2755 if (adata (abfd).line_buf != NULL)
2756 free (adata (abfd).line_buf);
2758 if (filelen + funclen == 0)
2759 adata (abfd).line_buf = buf = NULL;
2762 buf = bfd_malloc (filelen + funclen + 3);
2763 adata (abfd).line_buf = buf;
2768 if (main_file_name != NULL)
2770 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2771 *filename_ptr = main_file_name;
2774 sprintf (buf, "%s%s", directory_name, main_file_name);
2775 *filename_ptr = buf;
2782 const char *function = func->name;
2785 /* The caller expects a symbol name. We actually have a
2786 function name, without the leading underscore. Put the
2787 underscore back in, so that the caller gets a symbol name. */
2788 if (bfd_get_symbol_leading_char (abfd) == '\0')
2789 strcpy (buf, function);
2792 buf[0] = bfd_get_symbol_leading_char (abfd);
2793 strcpy (buf + 1, function);
2795 /* Have to remove : stuff. */
2796 colon = strchr (buf, ':');
2799 *functionname_ptr = buf;
2806 NAME (aout, sizeof_headers) (bfd *abfd,
2807 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2809 return adata (abfd).exec_bytes_size;
2812 /* Free all information we have cached for this BFD. We can always
2813 read it again later if we need it. */
2816 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2820 if (bfd_get_format (abfd) != bfd_object
2821 || abfd->tdata.aout_data == NULL)
2824 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2825 BFCI_FREE (obj_aout_symbols (abfd));
2827 obj_aout_external_syms (abfd) = 0;
2828 bfd_free_window (&obj_aout_sym_window (abfd));
2829 bfd_free_window (&obj_aout_string_window (abfd));
2830 obj_aout_external_strings (abfd) = 0;
2832 BFCI_FREE (obj_aout_external_syms (abfd));
2833 BFCI_FREE (obj_aout_external_strings (abfd));
2835 for (o = abfd->sections; o != NULL; o = o->next)
2836 BFCI_FREE (o->relocation);
2842 /* a.out link code. */
2844 /* Routine to create an entry in an a.out link hash table. */
2846 struct bfd_hash_entry *
2847 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2848 struct bfd_hash_table *table,
2851 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2853 /* Allocate the structure if it has not already been allocated by a
2856 ret = bfd_hash_allocate (table, sizeof (* ret));
2860 /* Call the allocation method of the superclass. */
2861 ret = ((struct aout_link_hash_entry *)
2862 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2866 /* Set local fields. */
2867 ret->written = FALSE;
2871 return (struct bfd_hash_entry *) ret;
2874 /* Initialize an a.out link hash table. */
2877 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2879 struct bfd_hash_entry *(*newfunc)
2880 (struct bfd_hash_entry *, struct bfd_hash_table *,
2882 unsigned int entsize)
2884 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2887 /* Create an a.out link hash table. */
2889 struct bfd_link_hash_table *
2890 NAME (aout, link_hash_table_create) (bfd *abfd)
2892 struct aout_link_hash_table *ret;
2893 bfd_size_type amt = sizeof (* ret);
2895 ret = bfd_malloc (amt);
2899 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2900 NAME (aout, link_hash_newfunc),
2901 sizeof (struct aout_link_hash_entry)))
2909 /* Add all symbols from an object file to the hash table. */
2912 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2914 bfd_boolean (*add_one_symbol)
2915 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2916 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2917 struct bfd_link_hash_entry **);
2918 struct external_nlist *syms;
2919 bfd_size_type sym_count;
2922 struct aout_link_hash_entry **sym_hash;
2923 struct external_nlist *p;
2924 struct external_nlist *pend;
2927 syms = obj_aout_external_syms (abfd);
2928 sym_count = obj_aout_external_sym_count (abfd);
2929 strings = obj_aout_external_strings (abfd);
2930 if (info->keep_memory)
2935 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2937 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2938 (abfd, info, &syms, &sym_count, &strings)))
2942 /* We keep a list of the linker hash table entries that correspond
2943 to particular symbols. We could just look them up in the hash
2944 table, but keeping the list is more efficient. Perhaps this
2945 should be conditional on info->keep_memory. */
2946 amt = sym_count * sizeof (struct aout_link_hash_entry *);
2947 sym_hash = bfd_alloc (abfd, amt);
2948 if (sym_hash == NULL && sym_count != 0)
2950 obj_aout_sym_hashes (abfd) = sym_hash;
2952 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
2953 if (add_one_symbol == NULL)
2954 add_one_symbol = _bfd_generic_link_add_one_symbol;
2957 pend = p + sym_count;
2958 for (; p < pend; p++, sym_hash++)
2969 type = H_GET_8 (abfd, p->e_type);
2971 /* Ignore debugging symbols. */
2972 if ((type & N_STAB) != 0)
2975 name = strings + GET_WORD (abfd, p->e_strx);
2976 value = GET_WORD (abfd, p->e_value);
2993 /* Ignore symbols that are not externally visible. */
2996 /* Ignore local indirect symbol. */
3001 case N_UNDF | N_EXT:
3004 section = bfd_und_section_ptr;
3008 section = bfd_com_section_ptr;
3011 section = bfd_abs_section_ptr;
3013 case N_TEXT | N_EXT:
3014 section = obj_textsec (abfd);
3015 value -= bfd_get_section_vma (abfd, section);
3017 case N_DATA | N_EXT:
3018 case N_SETV | N_EXT:
3019 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3020 translate_from_native_sym_flags. */
3021 section = obj_datasec (abfd);
3022 value -= bfd_get_section_vma (abfd, section);
3025 section = obj_bsssec (abfd);
3026 value -= bfd_get_section_vma (abfd, section);
3028 case N_INDR | N_EXT:
3029 /* An indirect symbol. The next symbol is the symbol
3030 which this one really is. */
3031 BFD_ASSERT (p + 1 < pend);
3033 string = strings + GET_WORD (abfd, p->e_strx);
3034 section = bfd_ind_section_ptr;
3035 flags |= BSF_INDIRECT;
3037 case N_COMM | N_EXT:
3038 section = bfd_com_section_ptr;
3040 case N_SETA: case N_SETA | N_EXT:
3041 section = bfd_abs_section_ptr;
3042 flags |= BSF_CONSTRUCTOR;
3044 case N_SETT: case N_SETT | N_EXT:
3045 section = obj_textsec (abfd);
3046 flags |= BSF_CONSTRUCTOR;
3047 value -= bfd_get_section_vma (abfd, section);
3049 case N_SETD: case N_SETD | N_EXT:
3050 section = obj_datasec (abfd);
3051 flags |= BSF_CONSTRUCTOR;
3052 value -= bfd_get_section_vma (abfd, section);
3054 case N_SETB: case N_SETB | N_EXT:
3055 section = obj_bsssec (abfd);
3056 flags |= BSF_CONSTRUCTOR;
3057 value -= bfd_get_section_vma (abfd, section);
3060 /* A warning symbol. The next symbol is the one to warn
3061 about. If there is no next symbol, just look away. */
3066 name = strings + GET_WORD (abfd, p->e_strx);
3067 section = bfd_und_section_ptr;
3068 flags |= BSF_WARNING;
3071 section = bfd_und_section_ptr;
3075 section = bfd_abs_section_ptr;
3079 section = obj_textsec (abfd);
3080 value -= bfd_get_section_vma (abfd, section);
3084 section = obj_datasec (abfd);
3085 value -= bfd_get_section_vma (abfd, section);
3089 section = obj_bsssec (abfd);
3090 value -= bfd_get_section_vma (abfd, section);
3095 if (! ((*add_one_symbol)
3096 (info, abfd, name, flags, section, value, string, copy, FALSE,
3097 (struct bfd_link_hash_entry **) sym_hash)))
3100 /* Restrict the maximum alignment of a common symbol based on
3101 the architecture, since a.out has no way to represent
3102 alignment requirements of a section in a .o file. FIXME:
3103 This isn't quite right: it should use the architecture of the
3104 output file, not the input files. */
3105 if ((*sym_hash)->root.type == bfd_link_hash_common
3106 && ((*sym_hash)->root.u.c.p->alignment_power >
3107 bfd_get_arch_info (abfd)->section_align_power))
3108 (*sym_hash)->root.u.c.p->alignment_power =
3109 bfd_get_arch_info (abfd)->section_align_power;
3111 /* If this is a set symbol, and we are not building sets, then
3112 it is possible for the hash entry to not have been set. In
3113 such a case, treat the symbol as not globally defined. */
3114 if ((*sym_hash)->root.type == bfd_link_hash_new)
3116 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3120 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3127 /* Free up the internal symbols read from an a.out file. */
3130 aout_link_free_symbols (bfd *abfd)
3132 if (obj_aout_external_syms (abfd) != NULL)
3135 bfd_free_window (&obj_aout_sym_window (abfd));
3137 free ((void *) obj_aout_external_syms (abfd));
3139 obj_aout_external_syms (abfd) = NULL;
3141 if (obj_aout_external_strings (abfd) != NULL)
3144 bfd_free_window (&obj_aout_string_window (abfd));
3146 free ((void *) obj_aout_external_strings (abfd));
3148 obj_aout_external_strings (abfd) = NULL;
3153 /* Add symbols from an a.out object file. */
3156 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3158 if (! aout_get_external_symbols (abfd))
3160 if (! aout_link_add_symbols (abfd, info))
3162 if (! info->keep_memory)
3164 if (! aout_link_free_symbols (abfd))
3170 /* Look through the internal symbols to see if this object file should
3171 be included in the link. We should include this object file if it
3172 defines any symbols which are currently undefined. If this object
3173 file defines a common symbol, then we may adjust the size of the
3174 known symbol but we do not include the object file in the link
3175 (unless there is some other reason to include it). */
3178 aout_link_check_ar_symbols (bfd *abfd,
3179 struct bfd_link_info *info,
3180 bfd_boolean *pneeded)
3182 struct external_nlist *p;
3183 struct external_nlist *pend;
3188 /* Look through all the symbols. */
3189 p = obj_aout_external_syms (abfd);
3190 pend = p + obj_aout_external_sym_count (abfd);
3191 strings = obj_aout_external_strings (abfd);
3192 for (; p < pend; p++)
3194 int type = H_GET_8 (abfd, p->e_type);
3196 struct bfd_link_hash_entry *h;
3198 /* Ignore symbols that are not externally visible. This is an
3199 optimization only, as we check the type more thoroughly
3201 if (((type & N_EXT) == 0
3202 || (type & N_STAB) != 0
3209 if (type == N_WARNING
3215 name = strings + GET_WORD (abfd, p->e_strx);
3216 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3218 /* We are only interested in symbols that are currently
3219 undefined or common. */
3221 || (h->type != bfd_link_hash_undefined
3222 && h->type != bfd_link_hash_common))
3224 if (type == (N_INDR | N_EXT))
3229 if (type == (N_TEXT | N_EXT)
3230 || type == (N_DATA | N_EXT)
3231 || type == (N_BSS | N_EXT)
3232 || type == (N_ABS | N_EXT)
3233 || type == (N_INDR | N_EXT))
3235 /* This object file defines this symbol. We must link it
3236 in. This is true regardless of whether the current
3237 definition of the symbol is undefined or common.
3239 If the current definition is common, we have a case in
3240 which we have already seen an object file including:
3242 and this object file from the archive includes:
3244 In such a case, whether to include this object is target
3245 dependant for backward compatibility.
3247 FIXME: The SunOS 4.1.3 linker will pull in the archive
3248 element if the symbol is defined in the .data section,
3249 but not if it is defined in the .text section. That
3250 seems a bit crazy to me, and it has not been implemented
3251 yet. However, it might be correct. */
3252 if (h->type == bfd_link_hash_common)
3256 switch (info->common_skip_ar_aymbols)
3258 case bfd_link_common_skip_text:
3259 skip = (type == (N_TEXT | N_EXT));
3261 case bfd_link_common_skip_data:
3262 skip = (type == (N_DATA | N_EXT));
3265 case bfd_link_common_skip_all:
3274 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3280 if (type == (N_UNDF | N_EXT))
3284 value = GET_WORD (abfd, p->e_value);
3287 /* This symbol is common in the object from the archive
3289 if (h->type == bfd_link_hash_undefined)
3294 symbfd = h->u.undef.abfd;
3297 /* This symbol was created as undefined from
3298 outside BFD. We assume that we should link
3299 in the object file. This is done for the -u
3300 option in the linker. */
3301 if (! (*info->callbacks->add_archive_element) (info,
3308 /* Turn the current link symbol into a common
3309 symbol. It is already on the undefs list. */
3310 h->type = bfd_link_hash_common;
3311 h->u.c.p = bfd_hash_allocate (&info->hash->table,
3312 sizeof (struct bfd_link_hash_common_entry));
3313 if (h->u.c.p == NULL)
3316 h->u.c.size = value;
3318 /* FIXME: This isn't quite right. The maximum
3319 alignment of a common symbol should be set by the
3320 architecture of the output file, not of the input
3322 power = bfd_log2 (value);
3323 if (power > bfd_get_arch_info (abfd)->section_align_power)
3324 power = bfd_get_arch_info (abfd)->section_align_power;
3325 h->u.c.p->alignment_power = power;
3327 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3332 /* Adjust the size of the common symbol if
3334 if (value > h->u.c.size)
3335 h->u.c.size = value;
3345 /* This symbol is weak but defined. We must pull it in if
3346 the current link symbol is undefined, but we don't want
3347 it if the current link symbol is common. */
3348 if (h->type == bfd_link_hash_undefined)
3350 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3358 /* We do not need this object file. */
3361 /* Check a single archive element to see if we need to include it in
3362 the link. *PNEEDED is set according to whether this element is
3363 needed in the link or not. This is called from
3364 _bfd_generic_link_add_archive_symbols. */
3367 aout_link_check_archive_element (bfd *abfd,
3368 struct bfd_link_info *info,
3369 bfd_boolean *pneeded)
3371 if (! aout_get_external_symbols (abfd))
3374 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3379 if (! aout_link_add_symbols (abfd, info))
3383 if (! info->keep_memory || ! *pneeded)
3385 if (! aout_link_free_symbols (abfd))
3392 /* Given an a.out BFD, add symbols to the global hash table as
3396 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3398 switch (bfd_get_format (abfd))
3401 return aout_link_add_object_symbols (abfd, info);
3403 return _bfd_generic_link_add_archive_symbols
3404 (abfd, info, aout_link_check_archive_element);
3406 bfd_set_error (bfd_error_wrong_format);
3411 /* A hash table used for header files with N_BINCL entries. */
3413 struct aout_link_includes_table
3415 struct bfd_hash_table root;
3418 /* A linked list of totals that we have found for a particular header
3421 struct aout_link_includes_totals
3423 struct aout_link_includes_totals *next;
3427 /* An entry in the header file hash table. */
3429 struct aout_link_includes_entry
3431 struct bfd_hash_entry root;
3432 /* List of totals we have found for this file. */
3433 struct aout_link_includes_totals *totals;
3436 /* Look up an entry in an the header file hash table. */
3438 #define aout_link_includes_lookup(table, string, create, copy) \
3439 ((struct aout_link_includes_entry *) \
3440 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3442 /* During the final link step we need to pass around a bunch of
3443 information, so we do it in an instance of this structure. */
3445 struct aout_final_link_info
3447 /* General link information. */
3448 struct bfd_link_info *info;
3451 /* Reloc file positions. */
3452 file_ptr treloff, dreloff;
3453 /* File position of symbols. */
3456 struct bfd_strtab_hash *strtab;
3457 /* Header file hash table. */
3458 struct aout_link_includes_table includes;
3459 /* A buffer large enough to hold the contents of any section. */
3461 /* A buffer large enough to hold the relocs of any section. */
3463 /* A buffer large enough to hold the symbol map of any input BFD. */
3465 /* A buffer large enough to hold output symbols of any input BFD. */
3466 struct external_nlist *output_syms;
3469 /* The function to create a new entry in the header file hash table. */
3471 static struct bfd_hash_entry *
3472 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3473 struct bfd_hash_table *table,
3476 struct aout_link_includes_entry *ret =
3477 (struct aout_link_includes_entry *) entry;
3479 /* Allocate the structure if it has not already been allocated by a
3482 ret = bfd_hash_allocate (table, sizeof (* ret));
3486 /* Call the allocation method of the superclass. */
3487 ret = ((struct aout_link_includes_entry *)
3488 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3491 /* Set local fields. */
3495 return (struct bfd_hash_entry *) ret;
3498 /* Write out a symbol that was not associated with an a.out input
3502 aout_link_write_other_symbol (struct aout_link_hash_entry *h, void * data)
3504 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
3508 struct external_nlist outsym;
3512 if (h->root.type == bfd_link_hash_warning)
3514 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3515 if (h->root.type == bfd_link_hash_new)
3519 output_bfd = finfo->output_bfd;
3521 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3523 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3524 (output_bfd, finfo->info, h)))
3526 /* FIXME: No way to handle errors. */
3536 /* An indx of -2 means the symbol must be written. */
3538 && (finfo->info->strip == strip_all
3539 || (finfo->info->strip == strip_some
3540 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
3541 FALSE, FALSE) == NULL)))
3544 switch (h->root.type)
3547 case bfd_link_hash_warning:
3549 /* Avoid variable not initialized warnings. */
3551 case bfd_link_hash_new:
3552 /* This can happen for set symbols when sets are not being
3555 case bfd_link_hash_undefined:
3556 type = N_UNDF | N_EXT;
3559 case bfd_link_hash_defined:
3560 case bfd_link_hash_defweak:
3564 sec = h->root.u.def.section->output_section;
3565 BFD_ASSERT (bfd_is_abs_section (sec)
3566 || sec->owner == output_bfd);
3567 if (sec == obj_textsec (output_bfd))
3568 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3569 else if (sec == obj_datasec (output_bfd))
3570 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3571 else if (sec == obj_bsssec (output_bfd))
3572 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3574 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3576 val = (h->root.u.def.value
3578 + h->root.u.def.section->output_offset);
3581 case bfd_link_hash_common:
3582 type = N_UNDF | N_EXT;
3583 val = h->root.u.c.size;
3585 case bfd_link_hash_undefweak:
3588 case bfd_link_hash_indirect:
3589 /* We ignore these symbols, since the indirected symbol is
3590 already in the hash table. */
3594 H_PUT_8 (output_bfd, type, outsym.e_type);
3595 H_PUT_8 (output_bfd, 0, outsym.e_other);
3596 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3597 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
3599 if (indx == - (bfd_size_type) 1)
3600 /* FIXME: No way to handle errors. */
3603 PUT_WORD (output_bfd, indx, outsym.e_strx);
3604 PUT_WORD (output_bfd, val, outsym.e_value);
3606 amt = EXTERNAL_NLIST_SIZE;
3607 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
3608 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3609 /* FIXME: No way to handle errors. */
3612 finfo->symoff += EXTERNAL_NLIST_SIZE;
3613 h->indx = obj_aout_external_sym_count (output_bfd);
3614 ++obj_aout_external_sym_count (output_bfd);
3619 /* Handle a link order which is supposed to generate a reloc. */
3622 aout_link_reloc_link_order (struct aout_final_link_info *finfo,
3624 struct bfd_link_order *p)
3626 struct bfd_link_order_reloc *pr;
3629 reloc_howto_type *howto;
3630 file_ptr *reloff_ptr = NULL;
3631 struct reloc_std_external srel;
3632 struct reloc_ext_external erel;
3638 if (p->type == bfd_section_reloc_link_order)
3641 if (bfd_is_abs_section (pr->u.section))
3642 r_index = N_ABS | N_EXT;
3645 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
3646 r_index = pr->u.section->target_index;
3651 struct aout_link_hash_entry *h;
3653 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3655 h = ((struct aout_link_hash_entry *)
3656 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
3657 pr->u.name, FALSE, FALSE, TRUE));
3663 /* We decided to strip this symbol, but it turns out that we
3664 can't. Note that we lose the other and desc information
3665 here. I don't think that will ever matter for a global
3669 if (! aout_link_write_other_symbol (h, (void *) finfo))
3675 if (! ((*finfo->info->callbacks->unattached_reloc)
3676 (finfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0)))
3682 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
3685 bfd_set_error (bfd_error_bad_value);
3689 if (o == obj_textsec (finfo->output_bfd))
3690 reloff_ptr = &finfo->treloff;
3691 else if (o == obj_datasec (finfo->output_bfd))
3692 reloff_ptr = &finfo->dreloff;
3696 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
3699 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto,
3709 r_pcrel = (int) howto->pc_relative;
3710 r_baserel = (howto->type & 8) != 0;
3711 r_jmptable = (howto->type & 16) != 0;
3712 r_relative = (howto->type & 32) != 0;
3713 r_length = howto->size;
3715 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
3716 if (bfd_header_big_endian (finfo->output_bfd))
3718 srel.r_index[0] = r_index >> 16;
3719 srel.r_index[1] = r_index >> 8;
3720 srel.r_index[2] = r_index;
3722 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3723 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3724 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3725 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3726 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3727 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3731 srel.r_index[2] = r_index >> 16;
3732 srel.r_index[1] = r_index >> 8;
3733 srel.r_index[0] = r_index;
3735 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3736 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3737 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3738 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3739 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3740 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3744 rel_ptr = (void *) &srel;
3746 /* We have to write the addend into the object file, since
3747 standard a.out relocs are in place. It would be more
3748 reliable if we had the current contents of the file here,
3749 rather than assuming zeroes, but we can't read the file since
3750 it was opened using bfd_openw. */
3751 if (pr->addend != 0)
3754 bfd_reloc_status_type r;
3758 size = bfd_get_reloc_size (howto);
3759 buf = bfd_zmalloc (size);
3762 r = MY_relocate_contents (howto, finfo->output_bfd,
3763 (bfd_vma) pr->addend, buf);
3769 case bfd_reloc_outofrange:
3771 case bfd_reloc_overflow:
3772 if (! ((*finfo->info->callbacks->reloc_overflow)
3774 (p->type == bfd_section_reloc_link_order
3775 ? bfd_section_name (finfo->output_bfd,
3778 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0)))
3785 ok = bfd_set_section_contents (finfo->output_bfd, o, (void *) buf,
3786 (file_ptr) p->offset, size);
3794 #ifdef MY_put_ext_reloc
3795 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
3796 howto, &erel, pr->addend);
3798 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
3800 if (bfd_header_big_endian (finfo->output_bfd))
3802 erel.r_index[0] = r_index >> 16;
3803 erel.r_index[1] = r_index >> 8;
3804 erel.r_index[2] = r_index;
3806 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3807 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3811 erel.r_index[2] = r_index >> 16;
3812 erel.r_index[1] = r_index >> 8;
3813 erel.r_index[0] = r_index;
3815 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3816 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3819 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3820 #endif /* MY_put_ext_reloc */
3822 rel_ptr = (void *) &erel;
3825 amt = obj_reloc_entry_size (finfo->output_bfd);
3826 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3827 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt)
3830 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
3832 /* Assert that the relocs have not run into the symbols, and that n
3833 the text relocs have not run into the data relocs. */
3834 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
3835 && (reloff_ptr != &finfo->treloff
3837 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
3842 /* Get the section corresponding to a reloc index. */
3844 static INLINE asection *
3845 aout_reloc_index_to_section (bfd *abfd, int indx)
3847 switch (indx & N_TYPE)
3849 case N_TEXT: return obj_textsec (abfd);
3850 case N_DATA: return obj_datasec (abfd);
3851 case N_BSS: return obj_bsssec (abfd);
3853 case N_UNDF: return bfd_abs_section_ptr;
3859 /* Relocate an a.out section using standard a.out relocs. */
3862 aout_link_input_section_std (struct aout_final_link_info *finfo,
3864 asection *input_section,
3865 struct reloc_std_external *relocs,
3866 bfd_size_type rel_size,
3869 bfd_boolean (*check_dynamic_reloc)
3870 (struct bfd_link_info *, bfd *, asection *,
3871 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3874 bfd_boolean relocatable;
3875 struct external_nlist *syms;
3877 struct aout_link_hash_entry **sym_hashes;
3879 bfd_size_type reloc_count;
3880 struct reloc_std_external *rel;
3881 struct reloc_std_external *rel_end;
3883 output_bfd = finfo->output_bfd;
3884 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3886 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3887 BFD_ASSERT (input_bfd->xvec->header_byteorder
3888 == output_bfd->xvec->header_byteorder);
3890 relocatable = finfo->info->relocatable;
3891 syms = obj_aout_external_syms (input_bfd);
3892 strings = obj_aout_external_strings (input_bfd);
3893 sym_hashes = obj_aout_sym_hashes (input_bfd);
3894 symbol_map = finfo->symbol_map;
3896 reloc_count = rel_size / RELOC_STD_SIZE;
3898 rel_end = rel + reloc_count;
3899 for (; rel < rel_end; rel++)
3906 reloc_howto_type *howto;
3907 struct aout_link_hash_entry *h = NULL;
3909 bfd_reloc_status_type r;
3911 r_addr = GET_SWORD (input_bfd, rel->r_address);
3913 #ifdef MY_reloc_howto
3914 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
3920 unsigned int howto_idx;
3922 if (bfd_header_big_endian (input_bfd))
3924 r_index = (((unsigned int) rel->r_index[0] << 16)
3925 | ((unsigned int) rel->r_index[1] << 8)
3927 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
3928 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
3929 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
3930 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
3931 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
3932 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
3933 >> RELOC_STD_BITS_LENGTH_SH_BIG);
3937 r_index = (((unsigned int) rel->r_index[2] << 16)
3938 | ((unsigned int) rel->r_index[1] << 8)
3940 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
3941 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
3942 r_baserel = (0 != (rel->r_type[0]
3943 & RELOC_STD_BITS_BASEREL_LITTLE));
3944 r_jmptable= (0 != (rel->r_type[0]
3945 & RELOC_STD_BITS_JMPTABLE_LITTLE));
3946 r_relative= (0 != (rel->r_type[0]
3947 & RELOC_STD_BITS_RELATIVE_LITTLE));
3948 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
3949 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
3952 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
3953 + 16 * r_jmptable + 32 * r_relative);
3954 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
3955 howto = howto_table_std + howto_idx;
3961 /* We are generating a relocatable output file, and must
3962 modify the reloc accordingly. */
3965 /* If we know the symbol this relocation is against,
3966 convert it into a relocation against a section. This
3967 is what the native linker does. */
3968 h = sym_hashes[r_index];
3970 && (h->root.type == bfd_link_hash_defined
3971 || h->root.type == bfd_link_hash_defweak))
3973 asection *output_section;
3975 /* Change the r_extern value. */
3976 if (bfd_header_big_endian (output_bfd))
3977 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
3979 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
3981 /* Compute a new r_index. */
3982 output_section = h->root.u.def.section->output_section;
3983 if (output_section == obj_textsec (output_bfd))
3985 else if (output_section == obj_datasec (output_bfd))
3987 else if (output_section == obj_bsssec (output_bfd))
3992 /* Add the symbol value and the section VMA to the
3993 addend stored in the contents. */
3994 relocation = (h->root.u.def.value
3995 + output_section->vma
3996 + h->root.u.def.section->output_offset);
4000 /* We must change r_index according to the symbol
4002 r_index = symbol_map[r_index];
4008 /* We decided to strip this symbol, but it
4009 turns out that we can't. Note that we
4010 lose the other and desc information here.
4011 I don't think that will ever matter for a
4017 if (! aout_link_write_other_symbol (h,
4027 name = strings + GET_WORD (input_bfd,
4028 syms[r_index].e_strx);
4029 if (! ((*finfo->info->callbacks->unattached_reloc)
4030 (finfo->info, name, input_bfd, input_section,
4040 /* Write out the new r_index value. */
4041 if (bfd_header_big_endian (output_bfd))
4043 rel->r_index[0] = r_index >> 16;
4044 rel->r_index[1] = r_index >> 8;
4045 rel->r_index[2] = r_index;
4049 rel->r_index[2] = r_index >> 16;
4050 rel->r_index[1] = r_index >> 8;
4051 rel->r_index[0] = r_index;
4058 /* This is a relocation against a section. We must
4059 adjust by the amount that the section moved. */
4060 section = aout_reloc_index_to_section (input_bfd, r_index);
4061 relocation = (section->output_section->vma
4062 + section->output_offset
4066 /* Change the address of the relocation. */
4067 PUT_WORD (output_bfd,
4068 r_addr + input_section->output_offset,
4071 /* Adjust a PC relative relocation by removing the reference
4072 to the original address in the section and including the
4073 reference to the new address. */
4075 relocation -= (input_section->output_section->vma
4076 + input_section->output_offset
4077 - input_section->vma);
4079 #ifdef MY_relocatable_reloc
4080 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4083 if (relocation == 0)
4086 r = MY_relocate_contents (howto,
4087 input_bfd, relocation,
4094 /* We are generating an executable, and must do a full
4100 h = sym_hashes[r_index];
4103 && (h->root.type == bfd_link_hash_defined
4104 || h->root.type == bfd_link_hash_defweak))
4106 relocation = (h->root.u.def.value
4107 + h->root.u.def.section->output_section->vma
4108 + h->root.u.def.section->output_offset);
4111 && h->root.type == bfd_link_hash_undefweak)
4123 section = aout_reloc_index_to_section (input_bfd, r_index);
4124 relocation = (section->output_section->vma
4125 + section->output_offset
4128 relocation += input_section->vma;
4131 if (check_dynamic_reloc != NULL)
4135 if (! ((*check_dynamic_reloc)
4136 (finfo->info, input_bfd, input_section, h,
4137 (void *) rel, contents, &skip, &relocation)))
4143 /* Now warn if a global symbol is undefined. We could not
4144 do this earlier, because check_dynamic_reloc might want
4145 to skip this reloc. */
4146 if (hundef && ! finfo->info->shared && ! r_baserel)
4151 name = h->root.root.string;
4153 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4154 if (! ((*finfo->info->callbacks->undefined_symbol)
4155 (finfo->info, name, input_bfd, input_section,
4160 r = MY_final_link_relocate (howto,
4161 input_bfd, input_section,
4162 contents, r_addr, relocation,
4166 if (r != bfd_reloc_ok)
4171 case bfd_reloc_outofrange:
4173 case bfd_reloc_overflow:
4180 name = strings + GET_WORD (input_bfd,
4181 syms[r_index].e_strx);
4186 s = aout_reloc_index_to_section (input_bfd, r_index);
4187 name = bfd_section_name (input_bfd, s);
4189 if (! ((*finfo->info->callbacks->reloc_overflow)
4190 (finfo->info, (h ? &h->root : NULL), name,
4191 howto->name, (bfd_vma) 0, input_bfd,
4192 input_section, r_addr)))
4203 /* Relocate an a.out section using extended a.out relocs. */
4206 aout_link_input_section_ext (struct aout_final_link_info *finfo,
4208 asection *input_section,
4209 struct reloc_ext_external *relocs,
4210 bfd_size_type rel_size,
4213 bfd_boolean (*check_dynamic_reloc)
4214 (struct bfd_link_info *, bfd *, asection *,
4215 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4218 bfd_boolean relocatable;
4219 struct external_nlist *syms;
4221 struct aout_link_hash_entry **sym_hashes;
4223 bfd_size_type reloc_count;
4224 struct reloc_ext_external *rel;
4225 struct reloc_ext_external *rel_end;
4227 output_bfd = finfo->output_bfd;
4228 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4230 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4231 BFD_ASSERT (input_bfd->xvec->header_byteorder
4232 == output_bfd->xvec->header_byteorder);
4234 relocatable = finfo->info->relocatable;
4235 syms = obj_aout_external_syms (input_bfd);
4236 strings = obj_aout_external_strings (input_bfd);
4237 sym_hashes = obj_aout_sym_hashes (input_bfd);
4238 symbol_map = finfo->symbol_map;
4240 reloc_count = rel_size / RELOC_EXT_SIZE;
4242 rel_end = rel + reloc_count;
4243 for (; rel < rel_end; rel++)
4248 unsigned int r_type;
4250 struct aout_link_hash_entry *h = NULL;
4251 asection *r_section = NULL;
4254 r_addr = GET_SWORD (input_bfd, rel->r_address);
4256 if (bfd_header_big_endian (input_bfd))
4258 r_index = (((unsigned int) rel->r_index[0] << 16)
4259 | ((unsigned int) rel->r_index[1] << 8)
4261 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4262 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4263 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4267 r_index = (((unsigned int) rel->r_index[2] << 16)
4268 | ((unsigned int) rel->r_index[1] << 8)
4270 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4271 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4272 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4275 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4277 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
4281 /* We are generating a relocatable output file, and must
4282 modify the reloc accordingly. */
4284 || r_type == (unsigned int) RELOC_BASE10
4285 || r_type == (unsigned int) RELOC_BASE13
4286 || r_type == (unsigned int) RELOC_BASE22)
4288 /* If we know the symbol this relocation is against,
4289 convert it into a relocation against a section. This
4290 is what the native linker does. */
4291 if (r_type == (unsigned int) RELOC_BASE10
4292 || r_type == (unsigned int) RELOC_BASE13
4293 || r_type == (unsigned int) RELOC_BASE22)
4296 h = sym_hashes[r_index];
4298 && (h->root.type == bfd_link_hash_defined
4299 || h->root.type == bfd_link_hash_defweak))
4301 asection *output_section;
4303 /* Change the r_extern value. */
4304 if (bfd_header_big_endian (output_bfd))
4305 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4307 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4309 /* Compute a new r_index. */
4310 output_section = h->root.u.def.section->output_section;
4311 if (output_section == obj_textsec (output_bfd))
4313 else if (output_section == obj_datasec (output_bfd))
4315 else if (output_section == obj_bsssec (output_bfd))
4320 /* Add the symbol value and the section VMA to the
4322 relocation = (h->root.u.def.value
4323 + output_section->vma
4324 + h->root.u.def.section->output_offset);
4326 /* Now RELOCATION is the VMA of the final
4327 destination. If this is a PC relative reloc,
4328 then ADDEND is the negative of the source VMA.
4329 We want to set ADDEND to the difference between
4330 the destination VMA and the source VMA, which
4331 means we must adjust RELOCATION by the change in
4332 the source VMA. This is done below. */
4336 /* We must change r_index according to the symbol
4338 r_index = symbol_map[r_index];
4344 /* We decided to strip this symbol, but it
4345 turns out that we can't. Note that we
4346 lose the other and desc information here.
4347 I don't think that will ever matter for a
4353 if (! aout_link_write_other_symbol (h,
4363 name = strings + GET_WORD (input_bfd,
4364 syms[r_index].e_strx);
4365 if (! ((*finfo->info->callbacks->unattached_reloc)
4366 (finfo->info, name, input_bfd, input_section,
4375 /* If this is a PC relative reloc, then the addend
4376 is the negative of the source VMA. We must
4377 adjust it by the change in the source VMA. This
4381 /* Write out the new r_index value. */
4382 if (bfd_header_big_endian (output_bfd))
4384 rel->r_index[0] = r_index >> 16;
4385 rel->r_index[1] = r_index >> 8;
4386 rel->r_index[2] = r_index;
4390 rel->r_index[2] = r_index >> 16;
4391 rel->r_index[1] = r_index >> 8;
4392 rel->r_index[0] = r_index;
4397 /* This is a relocation against a section. We must
4398 adjust by the amount that the section moved. */
4399 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4400 relocation = (r_section->output_section->vma
4401 + r_section->output_offset
4404 /* If this is a PC relative reloc, then the addend is
4405 the difference in VMA between the destination and the
4406 source. We have just adjusted for the change in VMA
4407 of the destination, so we must also adjust by the
4408 change in VMA of the source. This is done below. */
4411 /* As described above, we must always adjust a PC relative
4412 reloc by the change in VMA of the source. However, if
4413 pcrel_offset is set, then the addend does not include the
4414 location within the section, in which case we don't need
4415 to adjust anything. */
4416 if (howto_table_ext[r_type].pc_relative
4417 && ! howto_table_ext[r_type].pcrel_offset)
4418 relocation -= (input_section->output_section->vma
4419 + input_section->output_offset
4420 - input_section->vma);
4422 /* Change the addend if necessary. */
4423 if (relocation != 0)
4424 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4426 /* Change the address of the relocation. */
4427 PUT_WORD (output_bfd,
4428 r_addr + input_section->output_offset,
4434 bfd_reloc_status_type r;
4436 /* We are generating an executable, and must do a full
4442 h = sym_hashes[r_index];
4445 && (h->root.type == bfd_link_hash_defined
4446 || h->root.type == bfd_link_hash_defweak))
4448 relocation = (h->root.u.def.value
4449 + h->root.u.def.section->output_section->vma
4450 + h->root.u.def.section->output_offset);
4453 && h->root.type == bfd_link_hash_undefweak)
4461 else if (r_type == (unsigned int) RELOC_BASE10
4462 || r_type == (unsigned int) RELOC_BASE13
4463 || r_type == (unsigned int) RELOC_BASE22)
4465 struct external_nlist *sym;
4468 /* For base relative relocs, r_index is always an index
4469 into the symbol table, even if r_extern is 0. */
4470 sym = syms + r_index;
4471 type = H_GET_8 (input_bfd, sym->e_type);
4472 if ((type & N_TYPE) == N_TEXT
4474 r_section = obj_textsec (input_bfd);
4475 else if ((type & N_TYPE) == N_DATA
4477 r_section = obj_datasec (input_bfd);
4478 else if ((type & N_TYPE) == N_BSS
4480 r_section = obj_bsssec (input_bfd);
4481 else if ((type & N_TYPE) == N_ABS
4483 r_section = bfd_abs_section_ptr;
4486 relocation = (r_section->output_section->vma
4487 + r_section->output_offset
4488 + (GET_WORD (input_bfd, sym->e_value)
4493 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4495 /* If this is a PC relative reloc, then R_ADDEND is the
4496 difference between the two vmas, or
4497 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4499 old_dest_sec == section->vma
4501 old_src_sec == input_section->vma
4503 old_src_off == r_addr
4505 _bfd_final_link_relocate expects RELOCATION +
4506 R_ADDEND to be the VMA of the destination minus
4507 r_addr (the minus r_addr is because this relocation
4508 is not pcrel_offset, which is a bit confusing and
4509 should, perhaps, be changed), or
4512 new_dest_sec == output_section->vma + output_offset
4513 We arrange for this to happen by setting RELOCATION to
4514 new_dest_sec + old_src_sec - old_dest_sec
4516 If this is not a PC relative reloc, then R_ADDEND is
4517 simply the VMA of the destination, so we set
4518 RELOCATION to the change in the destination VMA, or
4519 new_dest_sec - old_dest_sec
4521 relocation = (r_section->output_section->vma
4522 + r_section->output_offset
4524 if (howto_table_ext[r_type].pc_relative)
4525 relocation += input_section->vma;
4528 if (check_dynamic_reloc != NULL)
4532 if (! ((*check_dynamic_reloc)
4533 (finfo->info, input_bfd, input_section, h,
4534 (void *) rel, contents, &skip, &relocation)))
4540 /* Now warn if a global symbol is undefined. We could not
4541 do this earlier, because check_dynamic_reloc might want
4542 to skip this reloc. */
4544 && ! finfo->info->shared
4545 && r_type != (unsigned int) RELOC_BASE10
4546 && r_type != (unsigned int) RELOC_BASE13
4547 && r_type != (unsigned int) RELOC_BASE22)
4552 name = h->root.root.string;
4554 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4555 if (! ((*finfo->info->callbacks->undefined_symbol)
4556 (finfo->info, name, input_bfd, input_section,
4561 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4562 r = MY_final_link_relocate (howto_table_ext + r_type,
4563 input_bfd, input_section,
4564 contents, r_addr, relocation,
4570 x = bfd_get_32 (input_bfd, contents + r_addr);
4571 x = x + relocation + r_addend;
4572 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4576 if (r != bfd_reloc_ok)
4581 case bfd_reloc_outofrange:
4583 case bfd_reloc_overflow:
4590 || r_type == (unsigned int) RELOC_BASE10
4591 || r_type == (unsigned int) RELOC_BASE13
4592 || r_type == (unsigned int) RELOC_BASE22)
4593 name = strings + GET_WORD (input_bfd,
4594 syms[r_index].e_strx);
4599 s = aout_reloc_index_to_section (input_bfd, r_index);
4600 name = bfd_section_name (input_bfd, s);
4602 if (! ((*finfo->info->callbacks->reloc_overflow)
4603 (finfo->info, (h ? &h->root : NULL), name,
4604 howto_table_ext[r_type].name,
4605 r_addend, input_bfd, input_section, r_addr)))
4617 /* Link an a.out section into the output file. */
4620 aout_link_input_section (struct aout_final_link_info *finfo,
4622 asection *input_section,
4623 file_ptr *reloff_ptr,
4624 bfd_size_type rel_size)
4626 bfd_size_type input_size;
4629 /* Get the section contents. */
4630 input_size = input_section->size;
4631 if (! bfd_get_section_contents (input_bfd, input_section,
4632 (void *) finfo->contents,
4633 (file_ptr) 0, input_size))
4636 /* Read in the relocs if we haven't already done it. */
4637 if (aout_section_data (input_section) != NULL
4638 && aout_section_data (input_section)->relocs != NULL)
4639 relocs = aout_section_data (input_section)->relocs;
4642 relocs = finfo->relocs;
4645 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4646 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4651 /* Relocate the section contents. */
4652 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4654 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4655 (struct reloc_std_external *) relocs,
4656 rel_size, finfo->contents))
4661 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4662 (struct reloc_ext_external *) relocs,
4663 rel_size, finfo->contents))
4667 /* Write out the section contents. */
4668 if (! bfd_set_section_contents (finfo->output_bfd,
4669 input_section->output_section,
4670 (void *) finfo->contents,
4671 (file_ptr) input_section->output_offset,
4675 /* If we are producing relocatable output, the relocs were
4676 modified, and we now write them out. */
4677 if (finfo->info->relocatable && rel_size > 0)
4679 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4681 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size)
4683 *reloff_ptr += rel_size;
4685 /* Assert that the relocs have not run into the symbols, and
4686 that if these are the text relocs they have not run into the
4688 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4689 && (reloff_ptr != &finfo->treloff
4691 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4697 /* Adjust and write out the symbols for an a.out file. Set the new
4698 symbol indices into a symbol_map. */
4701 aout_link_write_symbols (struct aout_final_link_info *finfo, bfd *input_bfd)
4704 bfd_size_type sym_count;
4706 enum bfd_link_strip strip;
4707 enum bfd_link_discard discard;
4708 struct external_nlist *outsym;
4709 bfd_size_type strtab_index;
4710 struct external_nlist *sym;
4711 struct external_nlist *sym_end;
4712 struct aout_link_hash_entry **sym_hash;
4715 bfd_boolean skip_next;
4717 output_bfd = finfo->output_bfd;
4718 sym_count = obj_aout_external_sym_count (input_bfd);
4719 strings = obj_aout_external_strings (input_bfd);
4720 strip = finfo->info->strip;
4721 discard = finfo->info->discard;
4722 outsym = finfo->output_syms;
4724 /* First write out a symbol for this object file, unless we are
4725 discarding such symbols. */
4726 if (strip != strip_all
4727 && (strip != strip_some
4728 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4729 FALSE, FALSE) != NULL)
4730 && discard != discard_all)
4732 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4733 H_PUT_8 (output_bfd, 0, outsym->e_other);
4734 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4735 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4736 input_bfd->filename, FALSE);
4737 if (strtab_index == (bfd_size_type) -1)
4739 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4740 PUT_WORD (output_bfd,
4741 (bfd_get_section_vma (output_bfd,
4742 obj_textsec (input_bfd)->output_section)
4743 + obj_textsec (input_bfd)->output_offset),
4745 ++obj_aout_external_sym_count (output_bfd);
4751 sym = obj_aout_external_syms (input_bfd);
4752 sym_end = sym + sym_count;
4753 sym_hash = obj_aout_sym_hashes (input_bfd);
4754 symbol_map = finfo->symbol_map;
4755 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4756 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4760 struct aout_link_hash_entry *h;
4766 /* We set *symbol_map to 0 above for all symbols. If it has
4767 already been set to -1 for this symbol, it means that we are
4768 discarding it because it appears in a duplicate header file.
4769 See the N_BINCL code below. */
4770 if (*symbol_map == -1)
4773 /* Initialize *symbol_map to -1, which means that the symbol was
4774 not copied into the output file. We will change it later if
4775 we do copy the symbol over. */
4778 type = H_GET_8 (input_bfd, sym->e_type);
4779 name = strings + GET_WORD (input_bfd, sym->e_strx);
4785 /* Pass this symbol through. It is the target of an
4786 indirect or warning symbol. */
4787 val = GET_WORD (input_bfd, sym->e_value);
4792 /* Skip this symbol, which is the target of an indirect
4793 symbol that we have changed to no longer be an indirect
4800 struct aout_link_hash_entry *hresolve;
4802 /* We have saved the hash table entry for this symbol, if
4803 there is one. Note that we could just look it up again
4804 in the hash table, provided we first check that it is an
4808 /* Use the name from the hash table, in case the symbol was
4811 && h->root.type != bfd_link_hash_warning)
4812 name = h->root.root.string;
4814 /* If this is an indirect or warning symbol, then change
4815 hresolve to the base symbol. We also change *sym_hash so
4816 that the relocation routines relocate against the real
4819 if (h != (struct aout_link_hash_entry *) NULL
4820 && (h->root.type == bfd_link_hash_indirect
4821 || h->root.type == bfd_link_hash_warning))
4823 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4824 while (hresolve->root.type == bfd_link_hash_indirect
4825 || hresolve->root.type == bfd_link_hash_warning)
4826 hresolve = ((struct aout_link_hash_entry *)
4827 hresolve->root.u.i.link);
4828 *sym_hash = hresolve;
4831 /* If the symbol has already been written out, skip it. */
4835 if ((type & N_TYPE) == N_INDR
4836 || type == N_WARNING)
4838 *symbol_map = h->indx;
4842 /* See if we are stripping this symbol. */
4848 case strip_debugger:
4849 if ((type & N_STAB) != 0)
4853 if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE)
4868 /* Get the value of the symbol. */
4869 if ((type & N_TYPE) == N_TEXT
4871 symsec = obj_textsec (input_bfd);
4872 else if ((type & N_TYPE) == N_DATA
4874 symsec = obj_datasec (input_bfd);
4875 else if ((type & N_TYPE) == N_BSS
4877 symsec = obj_bsssec (input_bfd);
4878 else if ((type & N_TYPE) == N_ABS
4880 symsec = bfd_abs_section_ptr;
4881 else if (((type & N_TYPE) == N_INDR
4882 && (hresolve == NULL
4883 || (hresolve->root.type != bfd_link_hash_defined
4884 && hresolve->root.type != bfd_link_hash_defweak
4885 && hresolve->root.type != bfd_link_hash_common)))
4886 || type == N_WARNING)
4888 /* Pass the next symbol through unchanged. The
4889 condition above for indirect symbols is so that if
4890 the indirect symbol was defined, we output it with
4891 the correct definition so the debugger will
4894 val = GET_WORD (input_bfd, sym->e_value);
4897 else if ((type & N_STAB) != 0)
4899 val = GET_WORD (input_bfd, sym->e_value);
4904 /* If we get here with an indirect symbol, it means that
4905 we are outputting it with a real definition. In such
4906 a case we do not want to output the next symbol,
4907 which is the target of the indirection. */
4908 if ((type & N_TYPE) == N_INDR)
4913 /* We need to get the value from the hash table. We use
4914 hresolve so that if we have defined an indirect
4915 symbol we output the final definition. */
4918 switch (type & N_TYPE)
4921 symsec = obj_textsec (input_bfd);
4924 symsec = obj_datasec (input_bfd);
4927 symsec = obj_bsssec (input_bfd);
4930 symsec = bfd_abs_section_ptr;
4937 else if (hresolve->root.type == bfd_link_hash_defined
4938 || hresolve->root.type == bfd_link_hash_defweak)
4940 asection *input_section;
4941 asection *output_section;
4943 /* This case usually means a common symbol which was
4944 turned into a defined symbol. */
4945 input_section = hresolve->root.u.def.section;
4946 output_section = input_section->output_section;
4947 BFD_ASSERT (bfd_is_abs_section (output_section)
4948 || output_section->owner == output_bfd);
4949 val = (hresolve->root.u.def.value
4950 + bfd_get_section_vma (output_bfd, output_section)
4951 + input_section->output_offset);
4953 /* Get the correct type based on the section. If
4954 this is a constructed set, force it to be
4955 globally visible. */
4964 if (output_section == obj_textsec (output_bfd))
4965 type |= (hresolve->root.type == bfd_link_hash_defined
4968 else if (output_section == obj_datasec (output_bfd))
4969 type |= (hresolve->root.type == bfd_link_hash_defined
4972 else if (output_section == obj_bsssec (output_bfd))
4973 type |= (hresolve->root.type == bfd_link_hash_defined
4977 type |= (hresolve->root.type == bfd_link_hash_defined
4981 else if (hresolve->root.type == bfd_link_hash_common)
4982 val = hresolve->root.u.c.size;
4983 else if (hresolve->root.type == bfd_link_hash_undefweak)
4992 val = (symsec->output_section->vma
4993 + symsec->output_offset
4994 + (GET_WORD (input_bfd, sym->e_value)
4997 /* If this is a global symbol set the written flag, and if
4998 it is a local symbol see if we should discard it. */
5002 h->indx = obj_aout_external_sym_count (output_bfd);
5004 else if ((type & N_TYPE) != N_SETT
5005 && (type & N_TYPE) != N_SETD
5006 && (type & N_TYPE) != N_SETB
5007 && (type & N_TYPE) != N_SETA)
5012 case discard_sec_merge:
5015 if ((type & N_STAB) == 0
5016 && bfd_is_local_label_name (input_bfd, name))
5030 /* An N_BINCL symbol indicates the start of the stabs
5031 entries for a header file. We need to scan ahead to the
5032 next N_EINCL symbol, ignoring nesting, adding up all the
5033 characters in the symbol names, not including the file
5034 numbers in types (the first number after an open
5036 if (type == (int) N_BINCL)
5038 struct external_nlist *incl_sym;
5040 struct aout_link_includes_entry *incl_entry;
5041 struct aout_link_includes_totals *t;
5045 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5049 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5050 if (incl_type == (int) N_EINCL)
5056 else if (incl_type == (int) N_BINCL)
5062 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5063 for (; *s != '\0'; s++)
5068 /* Skip the file number. */
5070 while (ISDIGIT (*s))
5078 /* If we have already included a header file with the
5079 same value, then replace this one with an N_EXCL
5081 copy = (bfd_boolean) (! finfo->info->keep_memory);
5082 incl_entry = aout_link_includes_lookup (&finfo->includes,
5084 if (incl_entry == NULL)
5086 for (t = incl_entry->totals; t != NULL; t = t->next)
5087 if (t->total == val)
5091 /* This is the first time we have seen this header
5092 file with this set of stabs strings. */
5093 t = bfd_hash_allocate (&finfo->includes.root,
5098 t->next = incl_entry->totals;
5099 incl_entry->totals = t;
5105 /* This is a duplicate header file. We must change
5106 it to be an N_EXCL entry, and mark all the
5107 included symbols to prevent outputting them. */
5108 type = (int) N_EXCL;
5111 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5113 incl_sym++, incl_map++)
5117 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5118 if (incl_type == (int) N_EINCL)
5127 else if (incl_type == (int) N_BINCL)
5136 /* Copy this symbol into the list of symbols we are going to
5138 H_PUT_8 (output_bfd, type, outsym->e_type);
5139 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5140 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5142 if (! finfo->info->keep_memory)
5144 /* name points into a string table which we are going to
5145 free. If there is a hash table entry, use that string.
5146 Otherwise, copy name into memory. */
5148 name = h->root.root.string;
5152 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
5154 if (strtab_index == (bfd_size_type) -1)
5156 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5157 PUT_WORD (output_bfd, val, outsym->e_value);
5158 *symbol_map = obj_aout_external_sym_count (output_bfd);
5159 ++obj_aout_external_sym_count (output_bfd);
5163 /* Write out the output symbols we have just constructed. */
5164 if (outsym > finfo->output_syms)
5166 bfd_size_type outsym_size;
5168 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
5170 outsym_size = outsym - finfo->output_syms;
5171 outsym_size *= EXTERNAL_NLIST_SIZE;
5172 if (bfd_bwrite ((void *) finfo->output_syms, outsym_size, output_bfd)
5175 finfo->symoff += outsym_size;
5181 /* Link an a.out input BFD into the output file. */
5184 aout_link_input_bfd (struct aout_final_link_info *finfo, bfd *input_bfd)
5186 bfd_size_type sym_count;
5188 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5190 /* If this is a dynamic object, it may need special handling. */
5191 if ((input_bfd->flags & DYNAMIC) != 0
5192 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5193 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5194 (finfo->info, input_bfd));
5196 /* Get the symbols. We probably have them already, unless
5197 finfo->info->keep_memory is FALSE. */
5198 if (! aout_get_external_symbols (input_bfd))
5201 sym_count = obj_aout_external_sym_count (input_bfd);
5203 /* Write out the symbols and get a map of the new indices. The map
5204 is placed into finfo->symbol_map. */
5205 if (! aout_link_write_symbols (finfo, input_bfd))
5208 /* Relocate and write out the sections. These functions use the
5209 symbol map created by aout_link_write_symbols. The linker_mark
5210 field will be set if these sections are to be included in the
5211 link, which will normally be the case. */
5212 if (obj_textsec (input_bfd)->linker_mark)
5214 if (! aout_link_input_section (finfo, input_bfd,
5215 obj_textsec (input_bfd),
5217 exec_hdr (input_bfd)->a_trsize))
5220 if (obj_datasec (input_bfd)->linker_mark)
5222 if (! aout_link_input_section (finfo, input_bfd,
5223 obj_datasec (input_bfd),
5225 exec_hdr (input_bfd)->a_drsize))
5229 /* If we are not keeping memory, we don't need the symbols any
5230 longer. We still need them if we are keeping memory, because the
5231 strings in the hash table point into them. */
5232 if (! finfo->info->keep_memory)
5234 if (! aout_link_free_symbols (input_bfd))
5241 /* Do the final link step. This is called on the output BFD. The
5242 INFO structure should point to a list of BFDs linked through the
5243 link_next field which can be used to find each BFD which takes part
5244 in the output. Also, each section in ABFD should point to a list
5245 of bfd_link_order structures which list all the input sections for
5246 the output section. */
5249 NAME (aout, final_link) (bfd *abfd,
5250 struct bfd_link_info *info,
5251 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5253 struct aout_final_link_info aout_info;
5254 bfd_boolean includes_hash_initialized = FALSE;
5256 bfd_size_type trsize, drsize;
5257 bfd_size_type max_contents_size;
5258 bfd_size_type max_relocs_size;
5259 bfd_size_type max_sym_count;
5260 bfd_size_type text_size;
5262 struct bfd_link_order *p;
5264 bfd_boolean have_link_order_relocs;
5267 abfd->flags |= DYNAMIC;
5269 aout_info.info = info;
5270 aout_info.output_bfd = abfd;
5271 aout_info.contents = NULL;
5272 aout_info.relocs = NULL;
5273 aout_info.symbol_map = NULL;
5274 aout_info.output_syms = NULL;
5276 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5277 aout_link_includes_newfunc,
5278 sizeof (struct aout_link_includes_entry),
5281 includes_hash_initialized = TRUE;
5283 /* Figure out the largest section size. Also, if generating
5284 relocatable output, count the relocs. */
5287 max_contents_size = 0;
5288 max_relocs_size = 0;
5290 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5294 if (info->relocatable)
5296 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5298 trsize += exec_hdr (sub)->a_trsize;
5299 drsize += exec_hdr (sub)->a_drsize;
5303 /* FIXME: We need to identify the .text and .data sections
5304 and call get_reloc_upper_bound and canonicalize_reloc to
5305 work out the number of relocs needed, and then multiply
5306 by the reloc size. */
5307 (*_bfd_error_handler)
5308 (_("%s: relocatable link from %s to %s not supported"),
5309 bfd_get_filename (abfd),
5310 sub->xvec->name, abfd->xvec->name);
5311 bfd_set_error (bfd_error_invalid_operation);
5316 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5318 sz = obj_textsec (sub)->size;
5319 if (sz > max_contents_size)
5320 max_contents_size = sz;
5321 sz = obj_datasec (sub)->size;
5322 if (sz > max_contents_size)
5323 max_contents_size = sz;
5325 sz = exec_hdr (sub)->a_trsize;
5326 if (sz > max_relocs_size)
5327 max_relocs_size = sz;
5328 sz = exec_hdr (sub)->a_drsize;
5329 if (sz > max_relocs_size)
5330 max_relocs_size = sz;
5332 sz = obj_aout_external_sym_count (sub);
5333 if (sz > max_sym_count)
5338 if (info->relocatable)
5340 if (obj_textsec (abfd) != NULL)
5341 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5342 ->map_head.link_order)
5343 * obj_reloc_entry_size (abfd));
5344 if (obj_datasec (abfd) != NULL)
5345 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5346 ->map_head.link_order)
5347 * obj_reloc_entry_size (abfd));
5350 exec_hdr (abfd)->a_trsize = trsize;
5351 exec_hdr (abfd)->a_drsize = drsize;
5353 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5355 /* Adjust the section sizes and vmas according to the magic number.
5356 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5357 filepos for each section. */
5358 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
5361 /* The relocation and symbol file positions differ among a.out
5362 targets. We are passed a callback routine from the backend
5363 specific code to handle this.
5364 FIXME: At this point we do not know how much space the symbol
5365 table will require. This will not work for any (nonstandard)
5366 a.out target that needs to know the symbol table size before it
5367 can compute the relocation file positions. This may or may not
5368 be the case for the hp300hpux target, for example. */
5369 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5371 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5372 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5373 obj_sym_filepos (abfd) = aout_info.symoff;
5375 /* We keep a count of the symbols as we output them. */
5376 obj_aout_external_sym_count (abfd) = 0;
5378 /* We accumulate the string table as we write out the symbols. */
5379 aout_info.strtab = _bfd_stringtab_init ();
5380 if (aout_info.strtab == NULL)
5383 /* Allocate buffers to hold section contents and relocs. */
5384 aout_info.contents = bfd_malloc (max_contents_size);
5385 aout_info.relocs = bfd_malloc (max_relocs_size);
5386 aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *));
5387 aout_info.output_syms = bfd_malloc ((max_sym_count + 1)
5388 * sizeof (struct external_nlist));
5389 if ((aout_info.contents == NULL && max_contents_size != 0)
5390 || (aout_info.relocs == NULL && max_relocs_size != 0)
5391 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5392 || aout_info.output_syms == NULL)
5395 /* If we have a symbol named __DYNAMIC, force it out now. This is
5396 required by SunOS. Doing this here rather than in sunos.c is a
5397 hack, but it's easier than exporting everything which would be
5400 struct aout_link_hash_entry *h;
5402 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5403 FALSE, FALSE, FALSE);
5405 aout_link_write_other_symbol (h, &aout_info);
5408 /* The most time efficient way to do the link would be to read all
5409 the input object files into memory and then sort out the
5410 information into the output file. Unfortunately, that will
5411 probably use too much memory. Another method would be to step
5412 through everything that composes the text section and write it
5413 out, and then everything that composes the data section and write
5414 it out, and then write out the relocs, and then write out the
5415 symbols. Unfortunately, that requires reading stuff from each
5416 input file several times, and we will not be able to keep all the
5417 input files open simultaneously, and reopening them will be slow.
5419 What we do is basically process one input file at a time. We do
5420 everything we need to do with an input file once--copy over the
5421 section contents, handle the relocation information, and write
5422 out the symbols--and then we throw away the information we read
5423 from it. This approach requires a lot of lseeks of the output
5424 file, which is unfortunate but still faster than reopening a lot
5427 We use the output_has_begun field of the input BFDs to see
5428 whether we have already handled it. */
5429 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5430 sub->output_has_begun = FALSE;
5432 /* Mark all sections which are to be included in the link. This
5433 will normally be every section. We need to do this so that we
5434 can identify any sections which the linker has decided to not
5436 for (o = abfd->sections; o != NULL; o = o->next)
5438 for (p = o->map_head.link_order; p != NULL; p = p->next)
5439 if (p->type == bfd_indirect_link_order)
5440 p->u.indirect.section->linker_mark = TRUE;
5443 have_link_order_relocs = FALSE;
5444 for (o = abfd->sections; o != NULL; o = o->next)
5446 for (p = o->map_head.link_order;
5450 if (p->type == bfd_indirect_link_order
5451 && (bfd_get_flavour (p->u.indirect.section->owner)
5452 == bfd_target_aout_flavour))
5456 input_bfd = p->u.indirect.section->owner;
5457 if (! input_bfd->output_has_begun)
5459 if (! aout_link_input_bfd (&aout_info, input_bfd))
5461 input_bfd->output_has_begun = TRUE;
5464 else if (p->type == bfd_section_reloc_link_order
5465 || p->type == bfd_symbol_reloc_link_order)
5467 /* These are handled below. */
5468 have_link_order_relocs = TRUE;
5472 if (! _bfd_default_link_order (abfd, info, o, p))
5478 /* Write out any symbols that we have not already written out. */
5479 aout_link_hash_traverse (aout_hash_table (info),
5480 aout_link_write_other_symbol,
5481 (void *) &aout_info);
5483 /* Now handle any relocs we were asked to create by the linker.
5484 These did not come from any input file. We must do these after
5485 we have written out all the symbols, so that we know the symbol
5487 if (have_link_order_relocs)
5489 for (o = abfd->sections; o != NULL; o = o->next)
5491 for (p = o->map_head.link_order;
5495 if (p->type == bfd_section_reloc_link_order
5496 || p->type == bfd_symbol_reloc_link_order)
5498 if (! aout_link_reloc_link_order (&aout_info, o, p))
5505 if (aout_info.contents != NULL)
5507 free (aout_info.contents);
5508 aout_info.contents = NULL;
5510 if (aout_info.relocs != NULL)
5512 free (aout_info.relocs);
5513 aout_info.relocs = NULL;
5515 if (aout_info.symbol_map != NULL)
5517 free (aout_info.symbol_map);
5518 aout_info.symbol_map = NULL;
5520 if (aout_info.output_syms != NULL)
5522 free (aout_info.output_syms);
5523 aout_info.output_syms = NULL;
5525 if (includes_hash_initialized)
5527 bfd_hash_table_free (&aout_info.includes.root);
5528 includes_hash_initialized = FALSE;
5531 /* Finish up any dynamic linking we may be doing. */
5532 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5534 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5538 /* Update the header information. */
5539 abfd->symcount = obj_aout_external_sym_count (abfd);
5540 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5541 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5542 obj_textsec (abfd)->reloc_count =
5543 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5544 obj_datasec (abfd)->reloc_count =
5545 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5547 /* Write out the string table, unless there are no symbols. */
5548 if (abfd->symcount > 0)
5550 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
5551 || ! emit_stringtab (abfd, aout_info.strtab))
5554 else if (obj_textsec (abfd)->reloc_count == 0
5555 && obj_datasec (abfd)->reloc_count == 0)
5561 pos = obj_datasec (abfd)->filepos + exec_hdr (abfd)->a_data - 1;
5562 if (bfd_seek (abfd, pos, SEEK_SET) != 0
5563 || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1)
5570 if (aout_info.contents != NULL)
5571 free (aout_info.contents);
5572 if (aout_info.relocs != NULL)
5573 free (aout_info.relocs);
5574 if (aout_info.symbol_map != NULL)
5575 free (aout_info.symbol_map);
5576 if (aout_info.output_syms != NULL)
5577 free (aout_info.output_syms);
5578 if (includes_hash_initialized)
5579 bfd_hash_table_free (&aout_info.includes.root);