1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2016 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sparc_aout_sunos_be_vec
72 requires all the names from @file{aout32.c}, and produces the jump vector
74 | sparc_aout_sunos_be_vec
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
86 When porting it to run on a new system, you must supply:
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected. */
110 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
111 Doesn't matter what the setting of WP_TEXT is on output, but it'll
113 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
114 * Any BFD with both flags clear is OMAGIC.
115 (Just want to make these explicit, so the conditions tested in this
116 file make sense if you're more familiar with a.out than with BFD.) */
118 #define KEEPIT udata.i
122 #include "safe-ctype.h"
127 #include "aout/aout64.h"
128 #include "aout/stab_gnu.h"
136 The file @file{aoutx.h} provides for both the @emph{standard}
137 and @emph{extended} forms of a.out relocation records.
139 The standard records contain only an
140 address, a symbol index, and a type field. The extended records
141 (used on 29ks and sparcs) also have a full integer for an
144 #ifndef CTOR_TABLE_RELOC_HOWTO
145 #define CTOR_TABLE_RELOC_IDX 2
146 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
147 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
148 ? howto_table_ext : howto_table_std) \
149 + CTOR_TABLE_RELOC_IDX)
152 #ifndef MY_swap_std_reloc_in
153 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
156 #ifndef MY_swap_ext_reloc_in
157 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
160 #ifndef MY_swap_std_reloc_out
161 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
164 #ifndef MY_swap_ext_reloc_out
165 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
168 #ifndef MY_final_link_relocate
169 #define MY_final_link_relocate _bfd_final_link_relocate
172 #ifndef MY_relocate_contents
173 #define MY_relocate_contents _bfd_relocate_contents
176 #define howto_table_ext NAME (aout, ext_howto_table)
177 #define howto_table_std NAME (aout, std_howto_table)
179 reloc_howto_type howto_table_ext[] =
181 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
182 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE),
183 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE),
184 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE),
185 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE),
186 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE),
187 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE),
188 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE),
189 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE),
190 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE),
191 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE),
192 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE),
193 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE),
194 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE),
195 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE),
196 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE),
197 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE),
198 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE),
199 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE),
200 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE),
201 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE),
202 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE),
203 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE),
204 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE),
205 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE),
206 HOWTO (0, 0, 3, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
207 HOWTO (0, 0, 3, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
208 #define RELOC_SPARC_REV32 RELOC_WDISP19
209 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE),
212 /* Convert standard reloc records to "arelent" format (incl byte swap). */
214 reloc_howto_type howto_table_std[] =
216 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
217 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
218 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
219 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
220 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
221 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
222 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
223 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
224 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
225 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
226 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
227 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
233 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
249 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
257 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
260 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
263 NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
265 #define EXT(i, j) case i: return & howto_table_ext [j]
266 #define STD(i, j) case i: return & howto_table_std [j]
267 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
269 if (code == BFD_RELOC_CTOR)
270 switch (bfd_arch_bits_per_address (abfd))
283 EXT (BFD_RELOC_8, 0);
284 EXT (BFD_RELOC_16, 1);
285 EXT (BFD_RELOC_32, 2);
286 EXT (BFD_RELOC_HI22, 8);
287 EXT (BFD_RELOC_LO10, 11);
288 EXT (BFD_RELOC_32_PCREL_S2, 6);
289 EXT (BFD_RELOC_SPARC_WDISP22, 7);
290 EXT (BFD_RELOC_SPARC13, 10);
291 EXT (BFD_RELOC_SPARC_GOT10, 14);
292 EXT (BFD_RELOC_SPARC_BASE13, 15);
293 EXT (BFD_RELOC_SPARC_GOT13, 15);
294 EXT (BFD_RELOC_SPARC_GOT22, 16);
295 EXT (BFD_RELOC_SPARC_PC10, 17);
296 EXT (BFD_RELOC_SPARC_PC22, 18);
297 EXT (BFD_RELOC_SPARC_WPLT30, 19);
298 EXT (BFD_RELOC_SPARC_REV32, 26);
306 STD (BFD_RELOC_8, 0);
307 STD (BFD_RELOC_16, 1);
308 STD (BFD_RELOC_32, 2);
309 STD (BFD_RELOC_8_PCREL, 4);
310 STD (BFD_RELOC_16_PCREL, 5);
311 STD (BFD_RELOC_32_PCREL, 6);
312 STD (BFD_RELOC_16_BASEREL, 9);
313 STD (BFD_RELOC_32_BASEREL, 10);
320 NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name)
322 unsigned int i, size;
323 reloc_howto_type *howto_table;
325 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE)
327 howto_table = howto_table_ext;
328 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]);
332 howto_table = howto_table_std;
333 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]);
336 for (i = 0; i < size; i++)
337 if (howto_table[i].name != NULL
338 && strcasecmp (howto_table[i].name, r_name) == 0)
339 return &howto_table[i];
346 Internal entry points
349 @file{aoutx.h} exports several routines for accessing the
350 contents of an a.out file, which are gathered and exported in
351 turn by various format specific files (eg sunos.c).
356 aout_@var{size}_swap_exec_header_in
359 void aout_@var{size}_swap_exec_header_in,
361 struct external_exec *bytes,
362 struct internal_exec *execp);
365 Swap the information in an executable header @var{raw_bytes} taken
366 from a raw byte stream memory image into the internal exec header
367 structure @var{execp}.
370 #ifndef NAME_swap_exec_header_in
372 NAME (aout, swap_exec_header_in) (bfd *abfd,
373 struct external_exec *bytes,
374 struct internal_exec *execp)
376 /* The internal_exec structure has some fields that are unused in this
377 configuration (IE for i960), so ensure that all such uninitialized
378 fields are zero'd out. There are places where two of these structs
379 are memcmp'd, and thus the contents do matter. */
380 memset ((void *) execp, 0, sizeof (struct internal_exec));
381 /* Now fill in fields in the execp, from the bytes in the raw data. */
382 execp->a_info = H_GET_32 (abfd, bytes->e_info);
383 execp->a_text = GET_WORD (abfd, bytes->e_text);
384 execp->a_data = GET_WORD (abfd, bytes->e_data);
385 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
386 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
387 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
388 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
389 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
391 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
396 aout_@var{size}_swap_exec_header_out
399 void aout_@var{size}_swap_exec_header_out
401 struct internal_exec *execp,
402 struct external_exec *raw_bytes);
405 Swap the information in an internal exec header structure
406 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
409 NAME (aout, swap_exec_header_out) (bfd *abfd,
410 struct internal_exec *execp,
411 struct external_exec *bytes)
413 /* Now fill in fields in the raw data, from the fields in the exec struct. */
414 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
415 PUT_WORD (abfd, execp->a_text , bytes->e_text);
416 PUT_WORD (abfd, execp->a_data , bytes->e_data);
417 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
418 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
419 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
420 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
421 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
424 /* Make all the section for an a.out file. */
427 NAME (aout, make_sections) (bfd *abfd)
429 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL)
431 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL)
433 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL)
440 aout_@var{size}_some_aout_object_p
443 const bfd_target *aout_@var{size}_some_aout_object_p
445 struct internal_exec *execp,
446 const bfd_target *(*callback_to_real_object_p) (bfd *));
449 Some a.out variant thinks that the file open in @var{abfd}
450 checking is an a.out file. Do some more checking, and set up
451 for access if it really is. Call back to the calling
452 environment's "finish up" function just before returning, to
453 handle any last-minute setup.
457 NAME (aout, some_aout_object_p) (bfd *abfd,
458 struct internal_exec *execp,
459 const bfd_target *(*callback_to_real_object_p) (bfd *))
461 struct aout_data_struct *rawptr, *oldrawptr;
462 const bfd_target *result;
463 bfd_size_type amt = sizeof (* rawptr);
465 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
469 oldrawptr = abfd->tdata.aout_data;
470 abfd->tdata.aout_data = rawptr;
472 /* Copy the contents of the old tdata struct.
473 In particular, we want the subformat, since for hpux it was set in
474 hp300hpux.c:swap_exec_header_in and will be used in
475 hp300hpux.c:callback. */
476 if (oldrawptr != NULL)
477 *abfd->tdata.aout_data = *oldrawptr;
479 abfd->tdata.aout_data->a.hdr = &rawptr->e;
480 /* Copy in the internal_exec struct. */
481 *(abfd->tdata.aout_data->a.hdr) = *execp;
482 execp = abfd->tdata.aout_data->a.hdr;
484 /* Set the file flags. */
485 abfd->flags = BFD_NO_FLAGS;
486 if (execp->a_drsize || execp->a_trsize)
487 abfd->flags |= HAS_RELOC;
488 /* Setting of EXEC_P has been deferred to the bottom of this function. */
490 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
491 if (N_DYNAMIC (execp))
492 abfd->flags |= DYNAMIC;
494 if (N_MAGIC (execp) == ZMAGIC)
496 abfd->flags |= D_PAGED | WP_TEXT;
497 adata (abfd).magic = z_magic;
499 else if (N_MAGIC (execp) == QMAGIC)
501 abfd->flags |= D_PAGED | WP_TEXT;
502 adata (abfd).magic = z_magic;
503 adata (abfd).subformat = q_magic_format;
505 else if (N_MAGIC (execp) == NMAGIC)
507 abfd->flags |= WP_TEXT;
508 adata (abfd).magic = n_magic;
510 else if (N_MAGIC (execp) == OMAGIC
511 || N_MAGIC (execp) == BMAGIC)
512 adata (abfd).magic = o_magic;
514 /* Should have been checked with N_BADMAG before this routine
518 bfd_get_start_address (abfd) = execp->a_entry;
520 obj_aout_symbols (abfd) = NULL;
521 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
523 /* The default relocation entry size is that of traditional V7 Unix. */
524 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
526 /* The default symbol entry size is that of traditional Unix. */
527 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
530 bfd_init_window (&obj_aout_sym_window (abfd));
531 bfd_init_window (&obj_aout_string_window (abfd));
533 obj_aout_external_syms (abfd) = NULL;
534 obj_aout_external_strings (abfd) = NULL;
535 obj_aout_sym_hashes (abfd) = NULL;
537 if (! NAME (aout, make_sections) (abfd))
540 obj_datasec (abfd)->size = execp->a_data;
541 obj_bsssec (abfd)->size = execp->a_bss;
543 obj_textsec (abfd)->flags =
544 (execp->a_trsize != 0
545 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
546 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
547 obj_datasec (abfd)->flags =
548 (execp->a_drsize != 0
549 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
550 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
551 obj_bsssec (abfd)->flags = SEC_ALLOC;
553 #ifdef THIS_IS_ONLY_DOCUMENTATION
554 /* The common code can't fill in these things because they depend
555 on either the start address of the text segment, the rounding
556 up of virtual addresses between segments, or the starting file
557 position of the text segment -- all of which varies among different
558 versions of a.out. */
560 /* Call back to the format-dependent code to fill in the rest of the
561 fields and do any further cleanup. Things that should be filled
562 in by the callback: */
564 struct exec *execp = exec_hdr (abfd);
566 obj_textsec (abfd)->size = N_TXTSIZE (execp);
567 /* Data and bss are already filled in since they're so standard. */
569 /* The virtual memory addresses of the sections. */
570 obj_textsec (abfd)->vma = N_TXTADDR (execp);
571 obj_datasec (abfd)->vma = N_DATADDR (execp);
572 obj_bsssec (abfd)->vma = N_BSSADDR (execp);
574 /* The file offsets of the sections. */
575 obj_textsec (abfd)->filepos = N_TXTOFF (execp);
576 obj_datasec (abfd)->filepos = N_DATOFF (execp);
578 /* The file offsets of the relocation info. */
579 obj_textsec (abfd)->rel_filepos = N_TRELOFF (execp);
580 obj_datasec (abfd)->rel_filepos = N_DRELOFF (execp);
582 /* The file offsets of the string table and symbol table. */
583 obj_str_filepos (abfd) = N_STROFF (execp);
584 obj_sym_filepos (abfd) = N_SYMOFF (execp);
586 /* Determine the architecture and machine type of the object file. */
587 switch (N_MACHTYPE (exec_hdr (abfd)))
590 abfd->obj_arch = bfd_arch_obscure;
594 adata (abfd)->page_size = TARGET_PAGE_SIZE;
595 adata (abfd)->segment_size = SEGMENT_SIZE;
596 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
600 /* The architecture is encoded in various ways in various a.out variants,
601 or is not encoded at all in some of them. The relocation size depends
602 on the architecture and the a.out variant. Finally, the return value
603 is the bfd_target vector in use. If an error occurs, return zero and
604 set bfd_error to the appropriate error code.
606 Formats such as b.out, which have additional fields in the a.out
607 header, should cope with them in this callback as well. */
608 #endif /* DOCUMENTATION */
610 result = (*callback_to_real_object_p) (abfd);
612 /* Now that the segment addresses have been worked out, take a better
613 guess at whether the file is executable. If the entry point
614 is within the text segment, assume it is. (This makes files
615 executable even if their entry point address is 0, as long as
616 their text starts at zero.).
618 This test had to be changed to deal with systems where the text segment
619 runs at a different location than the default. The problem is that the
620 entry address can appear to be outside the text segment, thus causing an
621 erroneous conclusion that the file isn't executable.
623 To fix this, we now accept any non-zero entry point as an indication of
624 executability. This will work most of the time, since only the linker
625 sets the entry point, and that is likely to be non-zero for most systems. */
627 if (execp->a_entry != 0
628 || (execp->a_entry >= obj_textsec (abfd)->vma
629 && execp->a_entry < (obj_textsec (abfd)->vma
630 + obj_textsec (abfd)->size)
631 && execp->a_trsize == 0
632 && execp->a_drsize == 0))
633 abfd->flags |= EXEC_P;
637 struct stat stat_buf;
639 /* The original heuristic doesn't work in some important cases.
640 The a.out file has no information about the text start
641 address. For files (like kernels) linked to non-standard
642 addresses (ld -Ttext nnn) the entry point may not be between
643 the default text start (obj_textsec(abfd)->vma) and
644 (obj_textsec(abfd)->vma) + text size. This is not just a mach
645 issue. Many kernels are loaded at non standard addresses. */
646 if (abfd->iostream != NULL
647 && (abfd->flags & BFD_IN_MEMORY) == 0
648 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
649 && ((stat_buf.st_mode & 0111) != 0))
650 abfd->flags |= EXEC_P;
652 #endif /* STAT_FOR_EXEC */
658 bfd_release (abfd, rawptr);
659 abfd->tdata.aout_data = oldrawptr;
665 aout_@var{size}_mkobject
668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
671 Initialize BFD @var{abfd} for use with a.out files.
675 NAME (aout, mkobject) (bfd *abfd)
677 struct aout_data_struct *rawptr;
678 bfd_size_type amt = sizeof (* rawptr);
680 bfd_set_error (bfd_error_system_call);
682 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
686 abfd->tdata.aout_data = rawptr;
687 exec_hdr (abfd) = &(rawptr->e);
689 obj_textsec (abfd) = NULL;
690 obj_datasec (abfd) = NULL;
691 obj_bsssec (abfd) = NULL;
698 aout_@var{size}_machine_type
701 enum machine_type aout_@var{size}_machine_type
702 (enum bfd_architecture arch,
703 unsigned long machine,
704 bfd_boolean *unknown);
707 Keep track of machine architecture and machine type for
708 a.out's. Return the <<machine_type>> for a particular
709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
710 and machine can't be represented in a.out format.
712 If the architecture is understood, machine type 0 (default)
713 is always understood.
717 NAME (aout, machine_type) (enum bfd_architecture arch,
718 unsigned long machine,
719 bfd_boolean *unknown)
721 enum machine_type arch_flags;
723 arch_flags = M_UNKNOWN;
730 || machine == bfd_mach_sparc
731 || machine == bfd_mach_sparc_sparclite
732 || machine == bfd_mach_sparc_sparclite_le
733 || machine == bfd_mach_sparc_v8plus
734 || machine == bfd_mach_sparc_v8plusa
735 || machine == bfd_mach_sparc_v8plusb
736 || machine == bfd_mach_sparc_v8plusc
737 || machine == bfd_mach_sparc_v8plusd
738 || machine == bfd_mach_sparc_v8pluse
739 || machine == bfd_mach_sparc_v8plusv
740 || machine == bfd_mach_sparc_v8plusm
741 || machine == bfd_mach_sparc_v9
742 || machine == bfd_mach_sparc_v9a
743 || machine == bfd_mach_sparc_v9b
744 || machine == bfd_mach_sparc_v9c
745 || machine == bfd_mach_sparc_v9d
746 || machine == bfd_mach_sparc_v9e
747 || machine == bfd_mach_sparc_v9v
748 || machine == bfd_mach_sparc_v9m)
749 arch_flags = M_SPARC;
750 else if (machine == bfd_mach_sparc_sparclet)
751 arch_flags = M_SPARCLET;
757 case 0: arch_flags = M_68010; break;
758 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break;
759 case bfd_mach_m68010: arch_flags = M_68010; break;
760 case bfd_mach_m68020: arch_flags = M_68020; break;
761 default: arch_flags = M_UNKNOWN; break;
767 || machine == bfd_mach_i386_i386
768 || machine == bfd_mach_i386_i386_intel_syntax)
781 case bfd_mach_mips3000:
782 case bfd_mach_mips3900:
783 arch_flags = M_MIPS1;
785 case bfd_mach_mips6000:
786 arch_flags = M_MIPS2;
788 case bfd_mach_mips4000:
789 case bfd_mach_mips4010:
790 case bfd_mach_mips4100:
791 case bfd_mach_mips4300:
792 case bfd_mach_mips4400:
793 case bfd_mach_mips4600:
794 case bfd_mach_mips4650:
795 case bfd_mach_mips8000:
796 case bfd_mach_mips9000:
797 case bfd_mach_mips10000:
798 case bfd_mach_mips12000:
799 case bfd_mach_mips14000:
800 case bfd_mach_mips16000:
801 case bfd_mach_mips16:
802 case bfd_mach_mipsisa32:
803 case bfd_mach_mipsisa32r2:
804 case bfd_mach_mipsisa32r3:
805 case bfd_mach_mipsisa32r5:
806 case bfd_mach_mipsisa32r6:
808 case bfd_mach_mipsisa64:
809 case bfd_mach_mipsisa64r2:
810 case bfd_mach_mipsisa64r3:
811 case bfd_mach_mipsisa64r5:
812 case bfd_mach_mipsisa64r6:
813 case bfd_mach_mips_sb1:
814 case bfd_mach_mips_xlr:
815 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
816 arch_flags = M_MIPS2;
819 arch_flags = M_UNKNOWN;
827 case 0: arch_flags = M_NS32532; break;
828 case 32032: arch_flags = M_NS32032; break;
829 case 32532: arch_flags = M_NS32532; break;
830 default: arch_flags = M_UNKNOWN; break;
839 if (machine == 0 || machine == 255)
848 arch_flags = M_UNKNOWN;
851 if (arch_flags != M_UNKNOWN)
859 aout_@var{size}_set_arch_mach
862 bfd_boolean aout_@var{size}_set_arch_mach,
864 enum bfd_architecture arch,
865 unsigned long machine);
868 Set the architecture and the machine of the BFD @var{abfd} to the
869 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
870 can support the architecture required.
874 NAME (aout, set_arch_mach) (bfd *abfd,
875 enum bfd_architecture arch,
876 unsigned long machine)
878 if (! bfd_default_set_arch_mach (abfd, arch, machine))
881 if (arch != bfd_arch_unknown)
885 NAME (aout, machine_type) (arch, machine, &unknown);
890 /* Determine the size of a relocation entry. */
895 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
898 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
902 return (*aout_backend_info (abfd)->set_sizes) (abfd);
906 adjust_o_magic (bfd *abfd, struct internal_exec *execp)
908 file_ptr pos = adata (abfd).exec_bytes_size;
913 obj_textsec (abfd)->filepos = pos;
914 if (!obj_textsec (abfd)->user_set_vma)
915 obj_textsec (abfd)->vma = vma;
917 vma = obj_textsec (abfd)->vma;
919 pos += obj_textsec (abfd)->size;
920 vma += obj_textsec (abfd)->size;
923 if (!obj_datasec (abfd)->user_set_vma)
925 obj_textsec (abfd)->size += pad;
928 obj_datasec (abfd)->vma = vma;
931 vma = obj_datasec (abfd)->vma;
932 obj_datasec (abfd)->filepos = pos;
933 pos += obj_datasec (abfd)->size;
934 vma += obj_datasec (abfd)->size;
937 if (!obj_bsssec (abfd)->user_set_vma)
939 obj_datasec (abfd)->size += pad;
942 obj_bsssec (abfd)->vma = vma;
946 /* The VMA of the .bss section is set by the VMA of the
947 .data section plus the size of the .data section. We may
948 need to add padding bytes to make this true. */
949 pad = obj_bsssec (abfd)->vma - vma;
952 obj_datasec (abfd)->size += pad;
956 obj_bsssec (abfd)->filepos = pos;
958 /* Fix up the exec header. */
959 execp->a_text = obj_textsec (abfd)->size;
960 execp->a_data = obj_datasec (abfd)->size;
961 execp->a_bss = obj_bsssec (abfd)->size;
962 N_SET_MAGIC (execp, OMAGIC);
966 adjust_z_magic (bfd *abfd, struct internal_exec *execp)
968 bfd_size_type data_pad, text_pad;
970 const struct aout_backend_data *abdp;
971 /* TRUE if text includes exec header. */
974 abdp = aout_backend_info (abfd);
978 && (abdp->text_includes_header
979 || obj_aout_subformat (abfd) == q_magic_format));
980 obj_textsec (abfd)->filepos = (ztih
981 ? adata (abfd).exec_bytes_size
982 : adata (abfd).zmagic_disk_block_size);
983 if (! obj_textsec (abfd)->user_set_vma)
985 /* ?? Do we really need to check for relocs here? */
986 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
989 ? (abdp->default_text_vma
990 + adata (abfd).exec_bytes_size)
991 : abdp->default_text_vma));
996 /* The .text section is being loaded at an unusual address. We
997 may need to pad it such that the .data section starts at a page
1000 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
1001 & (adata (abfd).page_size - 1));
1003 text_pad = ((- obj_textsec (abfd)->vma)
1004 & (adata (abfd).page_size - 1));
1007 /* Find start of data. */
1010 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size;
1011 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1015 /* Note that if page_size == zmagic_disk_block_size, then
1016 filepos == page_size, and this case is the same as the ztih
1018 text_end = obj_textsec (abfd)->size;
1019 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1020 text_end += obj_textsec (abfd)->filepos;
1022 obj_textsec (abfd)->size += text_pad;
1023 text_end += text_pad;
1026 if (!obj_datasec (abfd)->user_set_vma)
1029 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size;
1030 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1032 if (abdp && abdp->zmagic_mapped_contiguous)
1034 asection * text = obj_textsec (abfd);
1035 asection * data = obj_datasec (abfd);
1037 text_pad = data->vma - (text->vma + text->size);
1038 /* Only pad the text section if the data
1039 section is going to be placed after it. */
1041 text->size += text_pad;
1043 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1044 + obj_textsec (abfd)->size);
1046 /* Fix up exec header while we're at it. */
1047 execp->a_text = obj_textsec (abfd)->size;
1048 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1049 execp->a_text += adata (abfd).exec_bytes_size;
1050 if (obj_aout_subformat (abfd) == q_magic_format)
1051 N_SET_MAGIC (execp, QMAGIC);
1053 N_SET_MAGIC (execp, ZMAGIC);
1055 /* Spec says data section should be rounded up to page boundary. */
1056 obj_datasec (abfd)->size
1057 = align_power (obj_datasec (abfd)->size,
1058 obj_bsssec (abfd)->alignment_power);
1059 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size,
1060 adata (abfd).page_size);
1061 data_pad = execp->a_data - obj_datasec (abfd)->size;
1064 if (!obj_bsssec (abfd)->user_set_vma)
1065 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1066 + obj_datasec (abfd)->size);
1067 /* If the BSS immediately follows the data section and extra space
1068 in the page is left after the data section, fudge data
1069 in the header so that the bss section looks smaller by that
1070 amount. We'll start the bss section there, and lie to the OS.
1071 (Note that a linker script, as well as the above assignment,
1072 could have explicitly set the BSS vma to immediately follow
1073 the data section.) */
1074 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1075 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size)
1076 execp->a_bss = (data_pad > obj_bsssec (abfd)->size
1077 ? 0 : obj_bsssec (abfd)->size - data_pad);
1079 execp->a_bss = obj_bsssec (abfd)->size;
1083 adjust_n_magic (bfd *abfd, struct internal_exec *execp)
1085 file_ptr pos = adata (abfd).exec_bytes_size;
1090 obj_textsec (abfd)->filepos = pos;
1091 if (!obj_textsec (abfd)->user_set_vma)
1092 obj_textsec (abfd)->vma = vma;
1094 vma = obj_textsec (abfd)->vma;
1095 pos += obj_textsec (abfd)->size;
1096 vma += obj_textsec (abfd)->size;
1099 obj_datasec (abfd)->filepos = pos;
1100 if (!obj_datasec (abfd)->user_set_vma)
1101 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1102 vma = obj_datasec (abfd)->vma;
1104 /* Since BSS follows data immediately, see if it needs alignment. */
1105 vma += obj_datasec (abfd)->size;
1106 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1107 obj_datasec (abfd)->size += pad;
1108 pos += obj_datasec (abfd)->size;
1111 if (!obj_bsssec (abfd)->user_set_vma)
1112 obj_bsssec (abfd)->vma = vma;
1114 vma = obj_bsssec (abfd)->vma;
1116 /* Fix up exec header. */
1117 execp->a_text = obj_textsec (abfd)->size;
1118 execp->a_data = obj_datasec (abfd)->size;
1119 execp->a_bss = obj_bsssec (abfd)->size;
1120 N_SET_MAGIC (execp, NMAGIC);
1124 NAME (aout, adjust_sizes_and_vmas) (bfd *abfd)
1126 struct internal_exec *execp = exec_hdr (abfd);
1128 if (! NAME (aout, make_sections) (abfd))
1131 if (adata (abfd).magic != undecided_magic)
1134 obj_textsec (abfd)->size =
1135 align_power (obj_textsec (abfd)->size,
1136 obj_textsec (abfd)->alignment_power);
1138 /* Rule (heuristic) for when to pad to a new page. Note that there
1139 are (at least) two ways demand-paged (ZMAGIC) files have been
1140 handled. Most Berkeley-based systems start the text segment at
1141 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1142 segment right after the exec header; the latter is counted in the
1143 text segment size, and is paged in by the kernel with the rest of
1146 /* This perhaps isn't the right way to do this, but made it simpler for me
1147 to understand enough to implement it. Better would probably be to go
1148 right from BFD flags to alignment/positioning characteristics. But the
1149 old code was sloppy enough about handling the flags, and had enough
1150 other magic, that it was a little hard for me to understand. I think
1151 I understand it better now, but I haven't time to do the cleanup this
1154 if (abfd->flags & D_PAGED)
1155 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1156 adata (abfd).magic = z_magic;
1157 else if (abfd->flags & WP_TEXT)
1158 adata (abfd).magic = n_magic;
1160 adata (abfd).magic = o_magic;
1162 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1164 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1166 switch (adata (abfd).magic)
1168 case n_magic: str = "NMAGIC"; break;
1169 case o_magic: str = "OMAGIC"; break;
1170 case z_magic: str = "ZMAGIC"; break;
1175 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1176 obj_textsec (abfd)->alignment_power,
1177 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1178 obj_datasec (abfd)->alignment_power,
1179 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size,
1180 obj_bsssec (abfd)->alignment_power);
1184 switch (adata (abfd).magic)
1187 adjust_o_magic (abfd, execp);
1190 adjust_z_magic (abfd, execp);
1193 adjust_n_magic (abfd, execp);
1199 #ifdef BFD_AOUT_DEBUG
1200 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1201 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1202 obj_textsec (abfd)->filepos,
1203 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1204 obj_datasec (abfd)->filepos,
1205 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size);
1213 aout_@var{size}_new_section_hook
1216 bfd_boolean aout_@var{size}_new_section_hook,
1221 Called by the BFD in response to a @code{bfd_make_section}
1225 NAME (aout, new_section_hook) (bfd *abfd, asection *newsect)
1227 /* Align to double at least. */
1228 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
1230 if (bfd_get_format (abfd) == bfd_object)
1232 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1234 obj_textsec (abfd)= newsect;
1235 newsect->target_index = N_TEXT;
1237 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1239 obj_datasec (abfd) = newsect;
1240 newsect->target_index = N_DATA;
1242 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1244 obj_bsssec (abfd) = newsect;
1245 newsect->target_index = N_BSS;
1249 /* We allow more than three sections internally. */
1250 return _bfd_generic_new_section_hook (abfd, newsect);
1254 NAME (aout, set_section_contents) (bfd *abfd,
1256 const void * location,
1258 bfd_size_type count)
1260 if (! abfd->output_has_begun)
1262 if (! NAME (aout, adjust_sizes_and_vmas) (abfd))
1266 if (section == obj_bsssec (abfd))
1268 bfd_set_error (bfd_error_no_contents);
1272 if (section != obj_textsec (abfd)
1273 && section != obj_datasec (abfd))
1275 if (aout_section_merge_with_text_p (abfd, section))
1276 section->filepos = obj_textsec (abfd)->filepos +
1277 (section->vma - obj_textsec (abfd)->vma);
1280 (*_bfd_error_handler)
1281 (_("%s: can not represent section `%s' in a.out object file format"),
1282 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1283 bfd_set_error (bfd_error_nonrepresentable_section);
1290 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1291 || bfd_bwrite (location, count, abfd) != count)
1298 /* Read the external symbols from an a.out file. */
1301 aout_get_external_symbols (bfd *abfd)
1303 if (obj_aout_external_syms (abfd) == NULL)
1305 bfd_size_type count;
1306 struct external_nlist *syms;
1307 bfd_size_type amt = exec_hdr (abfd)->a_syms;
1309 count = amt / EXTERNAL_NLIST_SIZE;
1311 return TRUE; /* Nothing to do. */
1314 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd), amt,
1315 &obj_aout_sym_window (abfd), TRUE))
1317 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1319 /* We allocate using malloc to make the values easy to free
1320 later on. If we put them on the objalloc it might not be
1321 possible to free them. */
1322 syms = (struct external_nlist *) bfd_malloc (amt);
1326 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1327 || bfd_bread (syms, amt, abfd) != amt)
1334 obj_aout_external_syms (abfd) = syms;
1335 obj_aout_external_sym_count (abfd) = count;
1338 if (obj_aout_external_strings (abfd) == NULL
1339 && exec_hdr (abfd)->a_syms != 0)
1341 unsigned char string_chars[BYTES_IN_WORD];
1342 bfd_size_type stringsize;
1344 bfd_size_type amt = BYTES_IN_WORD;
1346 /* Get the size of the strings. */
1347 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1348 || bfd_bread ((void *) string_chars, amt, abfd) != amt)
1350 stringsize = GET_WORD (abfd, string_chars);
1353 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1354 &obj_aout_string_window (abfd), TRUE))
1356 strings = (char *) obj_aout_string_window (abfd).data;
1358 strings = (char *) bfd_malloc (stringsize + 1);
1359 if (strings == NULL)
1362 /* Skip space for the string count in the buffer for convenience
1363 when using indexes. */
1364 amt = stringsize - BYTES_IN_WORD;
1365 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1372 /* Ensure that a zero index yields an empty string. */
1375 strings[stringsize - 1] = 0;
1377 obj_aout_external_strings (abfd) = strings;
1378 obj_aout_external_string_size (abfd) = stringsize;
1384 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1385 and symbol->value fields of CACHE_PTR will be set from the a.out
1386 nlist structure. This function is responsible for setting
1387 symbol->flags and symbol->section, and adjusting symbol->value. */
1390 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1394 if ((cache_ptr->type & N_STAB) != 0
1395 || cache_ptr->type == N_FN)
1399 /* This is a debugging symbol. */
1400 cache_ptr->symbol.flags = BSF_DEBUGGING;
1402 /* Work out the symbol section. */
1403 switch (cache_ptr->type & N_TYPE)
1407 sec = obj_textsec (abfd);
1410 sec = obj_datasec (abfd);
1413 sec = obj_bsssec (abfd);
1417 sec = bfd_abs_section_ptr;
1421 cache_ptr->symbol.section = sec;
1422 cache_ptr->symbol.value -= sec->vma;
1427 /* Get the default visibility. This does not apply to all types, so
1428 we just hold it in a local variable to use if wanted. */
1429 if ((cache_ptr->type & N_EXT) == 0)
1430 visible = BSF_LOCAL;
1432 visible = BSF_GLOBAL;
1434 switch (cache_ptr->type)
1437 case N_ABS: case N_ABS | N_EXT:
1438 cache_ptr->symbol.section = bfd_abs_section_ptr;
1439 cache_ptr->symbol.flags = visible;
1442 case N_UNDF | N_EXT:
1443 if (cache_ptr->symbol.value != 0)
1445 /* This is a common symbol. */
1446 cache_ptr->symbol.flags = BSF_GLOBAL;
1447 cache_ptr->symbol.section = bfd_com_section_ptr;
1451 cache_ptr->symbol.flags = 0;
1452 cache_ptr->symbol.section = bfd_und_section_ptr;
1456 case N_TEXT: case N_TEXT | N_EXT:
1457 cache_ptr->symbol.section = obj_textsec (abfd);
1458 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1459 cache_ptr->symbol.flags = visible;
1462 /* N_SETV symbols used to represent set vectors placed in the
1463 data section. They are no longer generated. Theoretically,
1464 it was possible to extract the entries and combine them with
1465 new ones, although I don't know if that was ever actually
1466 done. Unless that feature is restored, treat them as data
1468 case N_SETV: case N_SETV | N_EXT:
1469 case N_DATA: case N_DATA | N_EXT:
1470 cache_ptr->symbol.section = obj_datasec (abfd);
1471 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1472 cache_ptr->symbol.flags = visible;
1475 case N_BSS: case N_BSS | N_EXT:
1476 cache_ptr->symbol.section = obj_bsssec (abfd);
1477 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1478 cache_ptr->symbol.flags = visible;
1481 case N_SETA: case N_SETA | N_EXT:
1482 case N_SETT: case N_SETT | N_EXT:
1483 case N_SETD: case N_SETD | N_EXT:
1484 case N_SETB: case N_SETB | N_EXT:
1486 /* This code is no longer needed. It used to be used to make
1487 the linker handle set symbols, but they are now handled in
1488 the add_symbols routine instead. */
1489 switch (cache_ptr->type & N_TYPE)
1492 cache_ptr->symbol.section = bfd_abs_section_ptr;
1495 cache_ptr->symbol.section = obj_textsec (abfd);
1498 cache_ptr->symbol.section = obj_datasec (abfd);
1501 cache_ptr->symbol.section = obj_bsssec (abfd);
1505 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1510 /* This symbol is the text of a warning message. The next
1511 symbol is the symbol to associate the warning with. If a
1512 reference is made to that symbol, a warning is issued. */
1513 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1514 cache_ptr->symbol.section = bfd_abs_section_ptr;
1517 case N_INDR: case N_INDR | N_EXT:
1518 /* An indirect symbol. This consists of two symbols in a row.
1519 The first symbol is the name of the indirection. The second
1520 symbol is the name of the target. A reference to the first
1521 symbol becomes a reference to the second. */
1522 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1523 cache_ptr->symbol.section = bfd_ind_section_ptr;
1527 cache_ptr->symbol.section = bfd_und_section_ptr;
1528 cache_ptr->symbol.flags = BSF_WEAK;
1532 cache_ptr->symbol.section = bfd_abs_section_ptr;
1533 cache_ptr->symbol.flags = BSF_WEAK;
1537 cache_ptr->symbol.section = obj_textsec (abfd);
1538 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1539 cache_ptr->symbol.flags = BSF_WEAK;
1543 cache_ptr->symbol.section = obj_datasec (abfd);
1544 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1545 cache_ptr->symbol.flags = BSF_WEAK;
1549 cache_ptr->symbol.section = obj_bsssec (abfd);
1550 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1551 cache_ptr->symbol.flags = BSF_WEAK;
1558 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1561 translate_to_native_sym_flags (bfd *abfd,
1563 struct external_nlist *sym_pointer)
1565 bfd_vma value = cache_ptr->value;
1569 /* Mask out any existing type bits in case copying from one section
1571 sym_pointer->e_type[0] &= ~N_TYPE;
1573 sec = bfd_get_section (cache_ptr);
1578 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1580 (*_bfd_error_handler)
1581 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1582 bfd_get_filename (abfd),
1583 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1584 bfd_set_error (bfd_error_nonrepresentable_section);
1588 if (sec->output_section != NULL)
1590 off = sec->output_offset;
1591 sec = sec->output_section;
1594 if (bfd_is_abs_section (sec))
1595 sym_pointer->e_type[0] |= N_ABS;
1596 else if (sec == obj_textsec (abfd))
1597 sym_pointer->e_type[0] |= N_TEXT;
1598 else if (sec == obj_datasec (abfd))
1599 sym_pointer->e_type[0] |= N_DATA;
1600 else if (sec == obj_bsssec (abfd))
1601 sym_pointer->e_type[0] |= N_BSS;
1602 else if (bfd_is_und_section (sec))
1603 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1604 else if (bfd_is_ind_section (sec))
1605 sym_pointer->e_type[0] = N_INDR;
1606 else if (bfd_is_com_section (sec))
1607 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1610 if (aout_section_merge_with_text_p (abfd, sec))
1611 sym_pointer->e_type[0] |= N_TEXT;
1614 (*_bfd_error_handler)
1615 (_("%s: can not represent section `%s' in a.out object file format"),
1616 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1617 bfd_set_error (bfd_error_nonrepresentable_section);
1622 /* Turn the symbol from section relative to absolute again. */
1623 value += sec->vma + off;
1625 if ((cache_ptr->flags & BSF_WARNING) != 0)
1626 sym_pointer->e_type[0] = N_WARNING;
1628 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1629 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1630 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1631 sym_pointer->e_type[0] |= N_EXT;
1632 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1633 sym_pointer->e_type[0] &= ~N_EXT;
1635 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1637 int type = ((aout_symbol_type *) cache_ptr)->type;
1641 case N_ABS: type = N_SETA; break;
1642 case N_TEXT: type = N_SETT; break;
1643 case N_DATA: type = N_SETD; break;
1644 case N_BSS: type = N_SETB; break;
1646 sym_pointer->e_type[0] = type;
1649 if ((cache_ptr->flags & BSF_WEAK) != 0)
1653 switch (sym_pointer->e_type[0] & N_TYPE)
1656 case N_ABS: type = N_WEAKA; break;
1657 case N_TEXT: type = N_WEAKT; break;
1658 case N_DATA: type = N_WEAKD; break;
1659 case N_BSS: type = N_WEAKB; break;
1660 case N_UNDF: type = N_WEAKU; break;
1662 sym_pointer->e_type[0] = type;
1665 PUT_WORD (abfd, value, sym_pointer->e_value);
1670 /* Native-level interface to symbols. */
1673 NAME (aout, make_empty_symbol) (bfd *abfd)
1675 bfd_size_type amt = sizeof (aout_symbol_type);
1677 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt);
1680 new_symbol->symbol.the_bfd = abfd;
1682 return &new_symbol->symbol;
1685 /* Translate a set of internal symbols into external symbols. */
1688 NAME (aout, translate_symbol_table) (bfd *abfd,
1689 aout_symbol_type *in,
1690 struct external_nlist *ext,
1691 bfd_size_type count,
1693 bfd_size_type strsize,
1694 bfd_boolean dynamic)
1696 struct external_nlist *ext_end;
1698 ext_end = ext + count;
1699 for (; ext < ext_end; ext++, in++)
1703 x = GET_WORD (abfd, ext->e_strx);
1704 in->symbol.the_bfd = abfd;
1706 /* For the normal symbols, the zero index points at the number
1707 of bytes in the string table but is to be interpreted as the
1708 null string. For the dynamic symbols, the number of bytes in
1709 the string table is stored in the __DYNAMIC structure and the
1710 zero index points at an actual string. */
1711 if (x == 0 && ! dynamic)
1712 in->symbol.name = "";
1713 else if (x < strsize)
1714 in->symbol.name = str + x;
1718 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1719 in->desc = H_GET_16 (abfd, ext->e_desc);
1720 in->other = H_GET_8 (abfd, ext->e_other);
1721 in->type = H_GET_8 (abfd, ext->e_type);
1722 in->symbol.udata.p = NULL;
1724 if (! translate_from_native_sym_flags (abfd, in))
1728 in->symbol.flags |= BSF_DYNAMIC;
1734 /* We read the symbols into a buffer, which is discarded when this
1735 function exits. We read the strings into a buffer large enough to
1736 hold them all plus all the cached symbol entries. */
1739 NAME (aout, slurp_symbol_table) (bfd *abfd)
1741 struct external_nlist *old_external_syms;
1742 aout_symbol_type *cached;
1743 bfd_size_type cached_size;
1745 /* If there's no work to be done, don't do any. */
1746 if (obj_aout_symbols (abfd) != NULL)
1749 old_external_syms = obj_aout_external_syms (abfd);
1751 if (! aout_get_external_symbols (abfd))
1754 cached_size = obj_aout_external_sym_count (abfd);
1755 if (cached_size == 0)
1756 return TRUE; /* Nothing to do. */
1758 cached_size *= sizeof (aout_symbol_type);
1759 cached = (aout_symbol_type *) bfd_zmalloc (cached_size);
1763 /* Convert from external symbol information to internal. */
1764 if (! (NAME (aout, translate_symbol_table)
1766 obj_aout_external_syms (abfd),
1767 obj_aout_external_sym_count (abfd),
1768 obj_aout_external_strings (abfd),
1769 obj_aout_external_string_size (abfd),
1776 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1778 obj_aout_symbols (abfd) = cached;
1780 /* It is very likely that anybody who calls this function will not
1781 want the external symbol information, so if it was allocated
1782 because of our call to aout_get_external_symbols, we free it up
1783 right away to save space. */
1784 if (old_external_syms == NULL
1785 && obj_aout_external_syms (abfd) != NULL)
1788 bfd_free_window (&obj_aout_sym_window (abfd));
1790 free (obj_aout_external_syms (abfd));
1792 obj_aout_external_syms (abfd) = NULL;
1798 /* We use a hash table when writing out symbols so that we only write
1799 out a particular string once. This helps particularly when the
1800 linker writes out stabs debugging entries, because each different
1801 contributing object file tends to have many duplicate stabs
1804 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1805 if BFD_TRADITIONAL_FORMAT is set. */
1807 /* Get the index of a string in a strtab, adding it if it is not
1810 static inline bfd_size_type
1811 add_to_stringtab (bfd *abfd,
1812 struct bfd_strtab_hash *tab,
1817 bfd_size_type str_index;
1819 /* An index of 0 always means the empty string. */
1820 if (str == 0 || *str == '\0')
1823 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1824 doesn't understand a hashed string table. */
1826 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1829 str_index = _bfd_stringtab_add (tab, str, hash, copy);
1831 if (str_index != (bfd_size_type) -1)
1832 /* Add BYTES_IN_WORD to the return value to account for the
1833 space taken up by the string table size. */
1834 str_index += BYTES_IN_WORD;
1839 /* Write out a strtab. ABFD is already at the right location in the
1843 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1845 bfd_byte buffer[BYTES_IN_WORD];
1846 bfd_size_type amt = BYTES_IN_WORD;
1848 /* The string table starts with the size. */
1849 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1850 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1853 return _bfd_stringtab_emit (abfd, tab);
1857 NAME (aout, write_syms) (bfd *abfd)
1859 unsigned int count ;
1860 asymbol **generic = bfd_get_outsymbols (abfd);
1861 struct bfd_strtab_hash *strtab;
1863 strtab = _bfd_stringtab_init ();
1867 for (count = 0; count < bfd_get_symcount (abfd); count++)
1869 asymbol *g = generic[count];
1871 struct external_nlist nsp;
1874 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1875 if (indx == (bfd_size_type) -1)
1877 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1879 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1881 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1882 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1883 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1887 H_PUT_16 (abfd, 0, nsp.e_desc);
1888 H_PUT_8 (abfd, 0, nsp.e_other);
1889 H_PUT_8 (abfd, 0, nsp.e_type);
1892 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1895 amt = EXTERNAL_NLIST_SIZE;
1896 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1899 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1900 here, at the end. */
1904 if (! emit_stringtab (abfd, strtab))
1907 _bfd_stringtab_free (strtab);
1912 _bfd_stringtab_free (strtab);
1917 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1919 unsigned int counter = 0;
1920 aout_symbol_type *symbase;
1922 if (!NAME (aout, slurp_symbol_table) (abfd))
1925 for (symbase = obj_aout_symbols (abfd);
1926 counter++ < bfd_get_symcount (abfd);
1928 *(location++) = (asymbol *) (symbase++);
1930 return bfd_get_symcount (abfd);
1933 /* Standard reloc stuff. */
1934 /* Output standard relocation information to a file in target byte order. */
1936 extern void NAME (aout, swap_std_reloc_out)
1937 (bfd *, arelent *, struct reloc_std_external *);
1940 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1942 struct reloc_std_external *natptr)
1945 asymbol *sym = *(g->sym_ptr_ptr);
1947 unsigned int r_length;
1949 int r_baserel, r_jmptable, r_relative;
1950 asection *output_section = sym->section->output_section;
1952 PUT_WORD (abfd, g->address, natptr->r_address);
1954 r_length = g->howto->size ; /* Size as a power of two. */
1955 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1956 /* XXX This relies on relocs coming from a.out files. */
1957 r_baserel = (g->howto->type & 8) != 0;
1958 r_jmptable = (g->howto->type & 16) != 0;
1959 r_relative = (g->howto->type & 32) != 0;
1961 /* Name was clobbered by aout_write_syms to be symbol index. */
1963 /* If this relocation is relative to a symbol then set the
1964 r_index to the symbols index, and the r_extern bit.
1966 Absolute symbols can come in in two ways, either as an offset
1967 from the abs section, or as a symbol which has an abs value.
1968 check for that here. */
1970 if (bfd_is_com_section (output_section)
1971 || bfd_is_abs_section (output_section)
1972 || bfd_is_und_section (output_section)
1973 /* PR gas/3041 a.out relocs against weak symbols
1974 must be treated as if they were against externs. */
1975 || (sym->flags & BSF_WEAK))
1977 if (bfd_abs_section_ptr->symbol == sym)
1979 /* Whoops, looked like an abs symbol, but is
1980 really an offset from the abs section. */
1986 /* Fill in symbol. */
1988 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1993 /* Just an ordinary section. */
1995 r_index = output_section->target_index;
1998 /* Now the fun stuff. */
1999 if (bfd_header_big_endian (abfd))
2001 natptr->r_index[0] = r_index >> 16;
2002 natptr->r_index[1] = r_index >> 8;
2003 natptr->r_index[2] = r_index;
2004 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
2005 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
2006 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
2007 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
2008 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
2009 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2013 natptr->r_index[2] = r_index >> 16;
2014 natptr->r_index[1] = r_index >> 8;
2015 natptr->r_index[0] = r_index;
2016 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2017 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2018 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2019 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2020 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2021 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2025 /* Extended stuff. */
2026 /* Output extended relocation information to a file in target byte order. */
2028 extern void NAME (aout, swap_ext_reloc_out)
2029 (bfd *, arelent *, struct reloc_ext_external *);
2032 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2034 struct reloc_ext_external *natptr)
2038 unsigned int r_type;
2040 asymbol *sym = *(g->sym_ptr_ptr);
2041 asection *output_section = sym->section->output_section;
2043 PUT_WORD (abfd, g->address, natptr->r_address);
2045 r_type = (unsigned int) g->howto->type;
2047 r_addend = g->addend;
2048 if ((sym->flags & BSF_SECTION_SYM) != 0)
2049 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2051 /* If this relocation is relative to a symbol then set the
2052 r_index to the symbols index, and the r_extern bit.
2054 Absolute symbols can come in in two ways, either as an offset
2055 from the abs section, or as a symbol which has an abs value.
2056 check for that here. */
2057 if (bfd_is_abs_section (bfd_get_section (sym)))
2062 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2064 if (bfd_is_und_section (bfd_get_section (sym))
2065 || (sym->flags & BSF_GLOBAL) != 0)
2069 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2073 /* Just an ordinary section. */
2075 r_index = output_section->target_index;
2078 /* Now the fun stuff. */
2079 if (bfd_header_big_endian (abfd))
2081 natptr->r_index[0] = r_index >> 16;
2082 natptr->r_index[1] = r_index >> 8;
2083 natptr->r_index[2] = r_index;
2084 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2085 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2089 natptr->r_index[2] = r_index >> 16;
2090 natptr->r_index[1] = r_index >> 8;
2091 natptr->r_index[0] = r_index;
2092 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2093 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2096 PUT_WORD (abfd, r_addend, natptr->r_addend);
2099 /* BFD deals internally with all things based from the section they're
2100 in. so, something in 10 bytes into a text section with a base of
2101 50 would have a symbol (.text+10) and know .text vma was 50.
2103 Aout keeps all it's symbols based from zero, so the symbol would
2104 contain 60. This macro subs the base of each section from the value
2105 to give the true offset from the section. */
2107 #define MOVE_ADDRESS(ad) \
2110 /* Undefined symbol. */ \
2111 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2112 cache_ptr->addend = ad; \
2116 /* Defined, section relative. Replace symbol with pointer to \
2117 symbol which points to section. */ \
2121 case N_TEXT | N_EXT: \
2122 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2123 cache_ptr->addend = ad - su->textsec->vma; \
2126 case N_DATA | N_EXT: \
2127 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2128 cache_ptr->addend = ad - su->datasec->vma; \
2131 case N_BSS | N_EXT: \
2132 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2133 cache_ptr->addend = ad - su->bsssec->vma; \
2137 case N_ABS | N_EXT: \
2138 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2139 cache_ptr->addend = ad; \
2145 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2146 struct reloc_ext_external *bytes,
2149 bfd_size_type symcount)
2151 unsigned int r_index;
2153 unsigned int r_type;
2154 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2156 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2158 /* Now the fun stuff. */
2159 if (bfd_header_big_endian (abfd))
2161 r_index = (((unsigned int) bytes->r_index[0] << 16)
2162 | ((unsigned int) bytes->r_index[1] << 8)
2163 | bytes->r_index[2]);
2164 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2165 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2166 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2170 r_index = (((unsigned int) bytes->r_index[2] << 16)
2171 | ((unsigned int) bytes->r_index[1] << 8)
2172 | bytes->r_index[0]);
2173 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2174 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2175 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2178 if (r_type < TABLE_SIZE (howto_table_ext))
2179 cache_ptr->howto = howto_table_ext + r_type;
2181 cache_ptr->howto = NULL;
2183 /* Base relative relocs are always against the symbol table,
2184 regardless of the setting of r_extern. r_extern just reflects
2185 whether the symbol the reloc is against is local or global. */
2186 if (r_type == (unsigned int) RELOC_BASE10
2187 || r_type == (unsigned int) RELOC_BASE13
2188 || r_type == (unsigned int) RELOC_BASE22)
2191 if (r_extern && r_index > symcount)
2193 /* We could arrange to return an error, but it might be useful
2194 to see the file even if it is bad. */
2199 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2203 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2204 struct reloc_std_external *bytes,
2207 bfd_size_type symcount)
2209 unsigned int r_index;
2211 unsigned int r_length;
2213 int r_baserel, r_jmptable, r_relative;
2214 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2215 unsigned int howto_idx;
2217 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2219 /* Now the fun stuff. */
2220 if (bfd_header_big_endian (abfd))
2222 r_index = (((unsigned int) bytes->r_index[0] << 16)
2223 | ((unsigned int) bytes->r_index[1] << 8)
2224 | bytes->r_index[2]);
2225 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2226 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2227 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2228 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2229 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2230 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2231 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2235 r_index = (((unsigned int) bytes->r_index[2] << 16)
2236 | ((unsigned int) bytes->r_index[1] << 8)
2237 | bytes->r_index[0]);
2238 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2239 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2240 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2241 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2242 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2243 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2244 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2247 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2248 + 16 * r_jmptable + 32 * r_relative);
2249 if (howto_idx < TABLE_SIZE (howto_table_std))
2251 cache_ptr->howto = howto_table_std + howto_idx;
2252 if (cache_ptr->howto->type == (unsigned int) -1)
2253 cache_ptr->howto = NULL;
2256 cache_ptr->howto = NULL;
2258 /* Base relative relocs are always against the symbol table,
2259 regardless of the setting of r_extern. r_extern just reflects
2260 whether the symbol the reloc is against is local or global. */
2264 if (r_extern && r_index > symcount)
2266 /* We could arrange to return an error, but it might be useful
2267 to see the file even if it is bad. */
2275 /* Read and swap the relocs for a section. */
2278 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2280 bfd_size_type count;
2281 bfd_size_type reloc_size;
2283 arelent *reloc_cache;
2285 unsigned int counter = 0;
2289 if (asect->relocation)
2292 if (asect->flags & SEC_CONSTRUCTOR)
2295 if (asect == obj_datasec (abfd))
2296 reloc_size = exec_hdr (abfd)->a_drsize;
2297 else if (asect == obj_textsec (abfd))
2298 reloc_size = exec_hdr (abfd)->a_trsize;
2299 else if (asect == obj_bsssec (abfd))
2303 bfd_set_error (bfd_error_invalid_operation);
2307 if (reloc_size == 0)
2308 return TRUE; /* Nothing to be done. */
2310 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2313 each_size = obj_reloc_entry_size (abfd);
2315 count = reloc_size / each_size;
2317 return TRUE; /* Nothing to be done. */
2319 amt = count * sizeof (arelent);
2320 reloc_cache = (arelent *) bfd_zmalloc (amt);
2321 if (reloc_cache == NULL)
2324 relocs = bfd_malloc (reloc_size);
2331 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2338 cache_ptr = reloc_cache;
2339 if (each_size == RELOC_EXT_SIZE)
2341 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2343 for (; counter < count; counter++, rptr++, cache_ptr++)
2344 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2345 (bfd_size_type) bfd_get_symcount (abfd));
2349 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2351 for (; counter < count; counter++, rptr++, cache_ptr++)
2352 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2353 (bfd_size_type) bfd_get_symcount (abfd));
2358 asect->relocation = reloc_cache;
2359 asect->reloc_count = cache_ptr - reloc_cache;
2364 /* Write out a relocation section into an object file. */
2367 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2370 unsigned char *native, *natptr;
2373 unsigned int count = section->reloc_count;
2374 bfd_size_type natsize;
2376 if (count == 0 || section->orelocation == NULL)
2379 each_size = obj_reloc_entry_size (abfd);
2380 natsize = (bfd_size_type) each_size * count;
2381 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2385 generic = section->orelocation;
2387 if (each_size == RELOC_EXT_SIZE)
2389 for (natptr = native;
2391 --count, natptr += each_size, ++generic)
2392 MY_swap_ext_reloc_out (abfd, *generic,
2393 (struct reloc_ext_external *) natptr);
2397 for (natptr = native;
2399 --count, natptr += each_size, ++generic)
2400 MY_swap_std_reloc_out (abfd, *generic,
2401 (struct reloc_std_external *) natptr);
2404 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2406 bfd_release (abfd, native);
2409 bfd_release (abfd, native);
2414 /* This is stupid. This function should be a boolean predicate. */
2417 NAME (aout, canonicalize_reloc) (bfd *abfd,
2422 arelent *tblptr = section->relocation;
2425 if (section == obj_bsssec (abfd))
2431 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2434 if (section->flags & SEC_CONSTRUCTOR)
2436 arelent_chain *chain = section->constructor_chain;
2437 for (count = 0; count < section->reloc_count; count ++)
2439 *relptr ++ = &chain->relent;
2440 chain = chain->next;
2445 tblptr = section->relocation;
2447 for (count = 0; count++ < section->reloc_count; )
2449 *relptr++ = tblptr++;
2454 return section->reloc_count;
2458 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2460 if (bfd_get_format (abfd) != bfd_object)
2462 bfd_set_error (bfd_error_invalid_operation);
2466 if (asect->flags & SEC_CONSTRUCTOR)
2467 return sizeof (arelent *) * (asect->reloc_count + 1);
2469 if (asect == obj_datasec (abfd))
2470 return sizeof (arelent *)
2471 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2474 if (asect == obj_textsec (abfd))
2475 return sizeof (arelent *)
2476 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2479 if (asect == obj_bsssec (abfd))
2480 return sizeof (arelent *);
2482 if (asect == obj_bsssec (abfd))
2485 bfd_set_error (bfd_error_invalid_operation);
2490 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2492 if (!NAME (aout, slurp_symbol_table) (abfd))
2495 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2499 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2500 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2506 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2510 bfd_symbol_info (symbol, ret);
2512 if (ret->type == '?')
2514 int type_code = aout_symbol (symbol)->type & 0xff;
2515 const char *stab_name = bfd_get_stab_name (type_code);
2516 static char buf[10];
2518 if (stab_name == NULL)
2520 sprintf (buf, "(%d)", type_code);
2524 ret->stab_type = type_code;
2525 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2526 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2527 ret->stab_name = stab_name;
2532 NAME (aout, print_symbol) (bfd *abfd,
2535 bfd_print_symbol_type how)
2537 FILE *file = (FILE *)afile;
2541 case bfd_print_symbol_name:
2543 fprintf (file,"%s", symbol->name);
2545 case bfd_print_symbol_more:
2546 fprintf (file,"%4x %2x %2x",
2547 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2548 (unsigned) (aout_symbol (symbol)->other & 0xff),
2549 (unsigned) (aout_symbol (symbol)->type));
2551 case bfd_print_symbol_all:
2553 const char *section_name = symbol->section->name;
2555 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2557 fprintf (file," %-5s %04x %02x %02x",
2559 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2560 (unsigned) (aout_symbol (symbol)->other & 0xff),
2561 (unsigned) (aout_symbol (symbol)->type & 0xff));
2563 fprintf (file," %s", symbol->name);
2569 /* If we don't have to allocate more than 1MB to hold the generic
2570 symbols, we use the generic minisymbol methord: it's faster, since
2571 it only translates the symbols once, not multiple times. */
2572 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2574 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2575 symbols. The minisymbol_to_symbol function translates these into
2576 BFD asymbol structures. */
2579 NAME (aout, read_minisymbols) (bfd *abfd,
2580 bfd_boolean dynamic,
2582 unsigned int *sizep)
2585 /* We could handle the dynamic symbols here as well, but it's
2586 easier to hand them off. */
2587 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2589 if (! aout_get_external_symbols (abfd))
2592 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2593 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2595 *minisymsp = (void *) obj_aout_external_syms (abfd);
2597 /* By passing the external symbols back from this routine, we are
2598 giving up control over the memory block. Clear
2599 obj_aout_external_syms, so that we do not try to free it
2601 obj_aout_external_syms (abfd) = NULL;
2603 *sizep = EXTERNAL_NLIST_SIZE;
2604 return obj_aout_external_sym_count (abfd);
2607 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2608 unmodified a.out symbol. The SYM argument is a structure returned
2609 by bfd_make_empty_symbol, which we fill in here. */
2612 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2613 bfd_boolean dynamic,
2614 const void * minisym,
2618 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2619 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2621 memset (sym, 0, sizeof (aout_symbol_type));
2623 /* We call translate_symbol_table to translate a single symbol. */
2624 if (! (NAME (aout, translate_symbol_table)
2626 (aout_symbol_type *) sym,
2627 (struct external_nlist *) minisym,
2629 obj_aout_external_strings (abfd),
2630 obj_aout_external_string_size (abfd),
2637 /* Provided a BFD, a section and an offset into the section, calculate
2638 and return the name of the source file and the line nearest to the
2642 NAME (aout, find_nearest_line) (bfd *abfd,
2646 const char **filename_ptr,
2647 const char **functionname_ptr,
2648 unsigned int *line_ptr,
2649 unsigned int *disriminator_ptr)
2651 /* Run down the file looking for the filename, function and linenumber. */
2653 const char *directory_name = NULL;
2654 const char *main_file_name = NULL;
2655 const char *current_file_name = NULL;
2656 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2657 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2658 bfd_vma low_line_vma = 0;
2659 bfd_vma low_func_vma = 0;
2661 bfd_size_type filelen, funclen;
2664 *filename_ptr = abfd->filename;
2665 *functionname_ptr = 0;
2667 if (disriminator_ptr)
2668 *disriminator_ptr = 0;
2670 if (symbols != NULL)
2672 for (p = symbols; *p; p++)
2674 aout_symbol_type *q = (aout_symbol_type *) (*p);
2679 /* If this looks like a file name symbol, and it comes after
2680 the line number we have found so far, but before the
2681 offset, then we have probably not found the right line
2683 if (q->symbol.value <= offset
2684 && ((q->symbol.value > low_line_vma
2685 && (line_file_name != NULL
2687 || (q->symbol.value > low_func_vma
2690 const char *symname;
2692 symname = q->symbol.name;
2693 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2695 if (q->symbol.value > low_line_vma)
2698 line_file_name = NULL;
2700 if (q->symbol.value > low_func_vma)
2707 /* If this symbol is less than the offset, but greater than
2708 the line number we have found so far, then we have not
2709 found the right line number. */
2710 if (q->symbol.value <= offset)
2712 if (q->symbol.value > low_line_vma)
2715 line_file_name = NULL;
2717 if (q->symbol.value > low_func_vma)
2721 main_file_name = current_file_name = q->symbol.name;
2722 /* Look ahead to next symbol to check if that too is an N_SO. */
2726 q = (aout_symbol_type *) (*p);
2727 if (q->type != (int)N_SO)
2730 /* Found a second N_SO First is directory; second is filename. */
2731 directory_name = current_file_name;
2732 main_file_name = current_file_name = q->symbol.name;
2733 if (obj_textsec (abfd) != section)
2737 current_file_name = q->symbol.name;
2744 /* We'll keep this if it resolves nearer than the one we have
2746 if (q->symbol.value >= low_line_vma
2747 && q->symbol.value <= offset)
2749 *line_ptr = q->desc;
2750 low_line_vma = q->symbol.value;
2751 line_file_name = current_file_name;
2752 line_directory_name = directory_name;
2757 /* We'll keep this if it is nearer than the one we have already. */
2758 if (q->symbol.value >= low_func_vma &&
2759 q->symbol.value <= offset)
2761 low_func_vma = q->symbol.value;
2762 func = (asymbol *)q;
2764 else if (q->symbol.value > offset)
2775 main_file_name = line_file_name;
2776 directory_name = line_directory_name;
2779 if (main_file_name == NULL
2780 || IS_ABSOLUTE_PATH (main_file_name)
2781 || directory_name == NULL)
2784 filelen = strlen (directory_name) + strlen (main_file_name);
2789 funclen = strlen (bfd_asymbol_name (func));
2791 if (adata (abfd).line_buf != NULL)
2792 free (adata (abfd).line_buf);
2794 if (filelen + funclen == 0)
2795 adata (abfd).line_buf = buf = NULL;
2798 buf = (char *) bfd_malloc (filelen + funclen + 3);
2799 adata (abfd).line_buf = buf;
2804 if (main_file_name != NULL)
2806 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2807 *filename_ptr = main_file_name;
2810 sprintf (buf, "%s%s", directory_name, main_file_name);
2811 *filename_ptr = buf;
2818 const char *function = func->name;
2821 /* The caller expects a symbol name. We actually have a
2822 function name, without the leading underscore. Put the
2823 underscore back in, so that the caller gets a symbol name. */
2824 if (bfd_get_symbol_leading_char (abfd) == '\0')
2825 strcpy (buf, function);
2828 buf[0] = bfd_get_symbol_leading_char (abfd);
2829 strcpy (buf + 1, function);
2831 /* Have to remove : stuff. */
2832 colon = strchr (buf, ':');
2835 *functionname_ptr = buf;
2842 NAME (aout, sizeof_headers) (bfd *abfd,
2843 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2845 return adata (abfd).exec_bytes_size;
2848 /* Free all information we have cached for this BFD. We can always
2849 read it again later if we need it. */
2852 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2856 if (bfd_get_format (abfd) != bfd_object
2857 || abfd->tdata.aout_data == NULL)
2860 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2861 BFCI_FREE (obj_aout_symbols (abfd));
2863 obj_aout_external_syms (abfd) = 0;
2864 bfd_free_window (&obj_aout_sym_window (abfd));
2865 bfd_free_window (&obj_aout_string_window (abfd));
2866 obj_aout_external_strings (abfd) = 0;
2868 BFCI_FREE (obj_aout_external_syms (abfd));
2869 BFCI_FREE (obj_aout_external_strings (abfd));
2871 for (o = abfd->sections; o != NULL; o = o->next)
2872 BFCI_FREE (o->relocation);
2878 /* a.out link code. */
2880 /* Routine to create an entry in an a.out link hash table. */
2882 struct bfd_hash_entry *
2883 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2884 struct bfd_hash_table *table,
2887 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2889 /* Allocate the structure if it has not already been allocated by a
2892 ret = (struct aout_link_hash_entry *) bfd_hash_allocate (table,
2897 /* Call the allocation method of the superclass. */
2898 ret = ((struct aout_link_hash_entry *)
2899 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2903 /* Set local fields. */
2904 ret->written = FALSE;
2908 return (struct bfd_hash_entry *) ret;
2911 /* Initialize an a.out link hash table. */
2914 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2916 struct bfd_hash_entry *(*newfunc)
2917 (struct bfd_hash_entry *, struct bfd_hash_table *,
2919 unsigned int entsize)
2921 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2924 /* Create an a.out link hash table. */
2926 struct bfd_link_hash_table *
2927 NAME (aout, link_hash_table_create) (bfd *abfd)
2929 struct aout_link_hash_table *ret;
2930 bfd_size_type amt = sizeof (* ret);
2932 ret = (struct aout_link_hash_table *) bfd_malloc (amt);
2936 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2937 NAME (aout, link_hash_newfunc),
2938 sizeof (struct aout_link_hash_entry)))
2946 /* Add all symbols from an object file to the hash table. */
2949 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2951 bfd_boolean (*add_one_symbol)
2952 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2953 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2954 struct bfd_link_hash_entry **);
2955 struct external_nlist *syms;
2956 bfd_size_type sym_count;
2959 struct aout_link_hash_entry **sym_hash;
2960 struct external_nlist *p;
2961 struct external_nlist *pend;
2964 syms = obj_aout_external_syms (abfd);
2965 sym_count = obj_aout_external_sym_count (abfd);
2966 strings = obj_aout_external_strings (abfd);
2967 if (info->keep_memory)
2972 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2974 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2975 (abfd, info, &syms, &sym_count, &strings)))
2980 return TRUE; /* Nothing to do. */
2982 /* We keep a list of the linker hash table entries that correspond
2983 to particular symbols. We could just look them up in the hash
2984 table, but keeping the list is more efficient. Perhaps this
2985 should be conditional on info->keep_memory. */
2986 amt = sym_count * sizeof (struct aout_link_hash_entry *);
2987 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt);
2988 if (sym_hash == NULL)
2990 obj_aout_sym_hashes (abfd) = sym_hash;
2992 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
2993 if (add_one_symbol == NULL)
2994 add_one_symbol = _bfd_generic_link_add_one_symbol;
2997 pend = p + sym_count;
2998 for (; p < pend; p++, sym_hash++)
3009 type = H_GET_8 (abfd, p->e_type);
3011 /* Ignore debugging symbols. */
3012 if ((type & N_STAB) != 0)
3015 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3016 if (GET_WORD (abfd, p->e_strx) > obj_aout_external_string_size (abfd))
3018 name = strings + GET_WORD (abfd, p->e_strx);
3020 value = GET_WORD (abfd, p->e_value);
3037 /* Ignore symbols that are not externally visible. */
3040 /* Ignore local indirect symbol. */
3045 case N_UNDF | N_EXT:
3048 section = bfd_und_section_ptr;
3052 section = bfd_com_section_ptr;
3055 section = bfd_abs_section_ptr;
3057 case N_TEXT | N_EXT:
3058 section = obj_textsec (abfd);
3059 value -= bfd_get_section_vma (abfd, section);
3061 case N_DATA | N_EXT:
3062 case N_SETV | N_EXT:
3063 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3064 translate_from_native_sym_flags. */
3065 section = obj_datasec (abfd);
3066 value -= bfd_get_section_vma (abfd, section);
3069 section = obj_bsssec (abfd);
3070 value -= bfd_get_section_vma (abfd, section);
3072 case N_INDR | N_EXT:
3073 /* An indirect symbol. The next symbol is the symbol
3074 which this one really is. */
3075 BFD_ASSERT (p + 1 < pend);
3077 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3078 if (GET_WORD (abfd, p->e_strx) > obj_aout_external_string_size (abfd))
3080 string = strings + GET_WORD (abfd, p->e_strx);
3081 section = bfd_ind_section_ptr;
3082 flags |= BSF_INDIRECT;
3084 case N_COMM | N_EXT:
3085 section = bfd_com_section_ptr;
3087 case N_SETA: case N_SETA | N_EXT:
3088 section = bfd_abs_section_ptr;
3089 flags |= BSF_CONSTRUCTOR;
3091 case N_SETT: case N_SETT | N_EXT:
3092 section = obj_textsec (abfd);
3093 flags |= BSF_CONSTRUCTOR;
3094 value -= bfd_get_section_vma (abfd, section);
3096 case N_SETD: case N_SETD | N_EXT:
3097 section = obj_datasec (abfd);
3098 flags |= BSF_CONSTRUCTOR;
3099 value -= bfd_get_section_vma (abfd, section);
3101 case N_SETB: case N_SETB | N_EXT:
3102 section = obj_bsssec (abfd);
3103 flags |= BSF_CONSTRUCTOR;
3104 value -= bfd_get_section_vma (abfd, section);
3107 /* A warning symbol. The next symbol is the one to warn
3108 about. If there is no next symbol, just look away. */
3113 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3114 if (GET_WORD (abfd, p->e_strx) > obj_aout_external_string_size (abfd))
3116 name = strings + GET_WORD (abfd, p->e_strx);
3117 section = bfd_und_section_ptr;
3118 flags |= BSF_WARNING;
3121 section = bfd_und_section_ptr;
3125 section = bfd_abs_section_ptr;
3129 section = obj_textsec (abfd);
3130 value -= bfd_get_section_vma (abfd, section);
3134 section = obj_datasec (abfd);
3135 value -= bfd_get_section_vma (abfd, section);
3139 section = obj_bsssec (abfd);
3140 value -= bfd_get_section_vma (abfd, section);
3145 if (! ((*add_one_symbol)
3146 (info, abfd, name, flags, section, value, string, copy, FALSE,
3147 (struct bfd_link_hash_entry **) sym_hash)))
3150 /* Restrict the maximum alignment of a common symbol based on
3151 the architecture, since a.out has no way to represent
3152 alignment requirements of a section in a .o file. FIXME:
3153 This isn't quite right: it should use the architecture of the
3154 output file, not the input files. */
3155 if ((*sym_hash)->root.type == bfd_link_hash_common
3156 && ((*sym_hash)->root.u.c.p->alignment_power >
3157 bfd_get_arch_info (abfd)->section_align_power))
3158 (*sym_hash)->root.u.c.p->alignment_power =
3159 bfd_get_arch_info (abfd)->section_align_power;
3161 /* If this is a set symbol, and we are not building sets, then
3162 it is possible for the hash entry to not have been set. In
3163 such a case, treat the symbol as not globally defined. */
3164 if ((*sym_hash)->root.type == bfd_link_hash_new)
3166 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3170 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3177 /* Free up the internal symbols read from an a.out file. */
3180 aout_link_free_symbols (bfd *abfd)
3182 if (obj_aout_external_syms (abfd) != NULL)
3185 bfd_free_window (&obj_aout_sym_window (abfd));
3187 free ((void *) obj_aout_external_syms (abfd));
3189 obj_aout_external_syms (abfd) = NULL;
3191 if (obj_aout_external_strings (abfd) != NULL)
3194 bfd_free_window (&obj_aout_string_window (abfd));
3196 free ((void *) obj_aout_external_strings (abfd));
3198 obj_aout_external_strings (abfd) = NULL;
3203 /* Add symbols from an a.out object file. */
3206 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3208 if (! aout_get_external_symbols (abfd))
3210 if (! aout_link_add_symbols (abfd, info))
3212 if (! info->keep_memory)
3214 if (! aout_link_free_symbols (abfd))
3220 /* Look through the internal symbols to see if this object file should
3221 be included in the link. We should include this object file if it
3222 defines any symbols which are currently undefined. If this object
3223 file defines a common symbol, then we may adjust the size of the
3224 known symbol but we do not include the object file in the link
3225 (unless there is some other reason to include it). */
3228 aout_link_check_ar_symbols (bfd *abfd,
3229 struct bfd_link_info *info,
3230 bfd_boolean *pneeded,
3233 struct external_nlist *p;
3234 struct external_nlist *pend;
3239 /* Look through all the symbols. */
3240 p = obj_aout_external_syms (abfd);
3241 pend = p + obj_aout_external_sym_count (abfd);
3242 strings = obj_aout_external_strings (abfd);
3243 for (; p < pend; p++)
3245 int type = H_GET_8 (abfd, p->e_type);
3247 struct bfd_link_hash_entry *h;
3249 /* Ignore symbols that are not externally visible. This is an
3250 optimization only, as we check the type more thoroughly
3252 if (((type & N_EXT) == 0
3253 || (type & N_STAB) != 0
3260 if (type == N_WARNING
3266 name = strings + GET_WORD (abfd, p->e_strx);
3267 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3269 /* We are only interested in symbols that are currently
3270 undefined or common. */
3272 || (h->type != bfd_link_hash_undefined
3273 && h->type != bfd_link_hash_common))
3275 if (type == (N_INDR | N_EXT))
3280 if (type == (N_TEXT | N_EXT)
3281 || type == (N_DATA | N_EXT)
3282 || type == (N_BSS | N_EXT)
3283 || type == (N_ABS | N_EXT)
3284 || type == (N_INDR | N_EXT))
3286 /* This object file defines this symbol. We must link it
3287 in. This is true regardless of whether the current
3288 definition of the symbol is undefined or common.
3290 If the current definition is common, we have a case in
3291 which we have already seen an object file including:
3293 and this object file from the archive includes:
3295 In such a case, whether to include this object is target
3296 dependant for backward compatibility.
3298 FIXME: The SunOS 4.1.3 linker will pull in the archive
3299 element if the symbol is defined in the .data section,
3300 but not if it is defined in the .text section. That
3301 seems a bit crazy to me, and it has not been implemented
3302 yet. However, it might be correct. */
3303 if (h->type == bfd_link_hash_common)
3307 switch (info->common_skip_ar_symbols)
3309 case bfd_link_common_skip_text:
3310 skip = (type == (N_TEXT | N_EXT));
3312 case bfd_link_common_skip_data:
3313 skip = (type == (N_DATA | N_EXT));
3316 case bfd_link_common_skip_all:
3325 if (!(*info->callbacks
3326 ->add_archive_element) (info, abfd, name, subsbfd))
3332 if (type == (N_UNDF | N_EXT))
3336 value = GET_WORD (abfd, p->e_value);
3339 /* This symbol is common in the object from the archive
3341 if (h->type == bfd_link_hash_undefined)
3346 symbfd = h->u.undef.abfd;
3349 /* This symbol was created as undefined from
3350 outside BFD. We assume that we should link
3351 in the object file. This is done for the -u
3352 option in the linker. */
3353 if (!(*info->callbacks
3354 ->add_archive_element) (info, abfd, name, subsbfd))
3359 /* Turn the current link symbol into a common
3360 symbol. It is already on the undefs list. */
3361 h->type = bfd_link_hash_common;
3362 h->u.c.p = (struct bfd_link_hash_common_entry *)
3363 bfd_hash_allocate (&info->hash->table,
3364 sizeof (struct bfd_link_hash_common_entry));
3365 if (h->u.c.p == NULL)
3368 h->u.c.size = value;
3370 /* FIXME: This isn't quite right. The maximum
3371 alignment of a common symbol should be set by the
3372 architecture of the output file, not of the input
3374 power = bfd_log2 (value);
3375 if (power > bfd_get_arch_info (abfd)->section_align_power)
3376 power = bfd_get_arch_info (abfd)->section_align_power;
3377 h->u.c.p->alignment_power = power;
3379 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3384 /* Adjust the size of the common symbol if
3386 if (value > h->u.c.size)
3387 h->u.c.size = value;
3397 /* This symbol is weak but defined. We must pull it in if
3398 the current link symbol is undefined, but we don't want
3399 it if the current link symbol is common. */
3400 if (h->type == bfd_link_hash_undefined)
3402 if (!(*info->callbacks
3403 ->add_archive_element) (info, abfd, name, subsbfd))
3411 /* We do not need this object file. */
3414 /* Check a single archive element to see if we need to include it in
3415 the link. *PNEEDED is set according to whether this element is
3416 needed in the link or not. This is called from
3417 _bfd_generic_link_add_archive_symbols. */
3420 aout_link_check_archive_element (bfd *abfd,
3421 struct bfd_link_info *info,
3422 struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED,
3423 const char *name ATTRIBUTE_UNUSED,
3424 bfd_boolean *pneeded)
3429 if (!aout_get_external_symbols (abfd))
3433 if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd))
3439 /* Potentially, the add_archive_element hook may have set a
3440 substitute BFD for us. */
3443 if (!info->keep_memory
3444 && !aout_link_free_symbols (oldbfd))
3446 if (!aout_get_external_symbols (abfd))
3449 if (!aout_link_add_symbols (abfd, info))
3453 if (!info->keep_memory || !needed)
3455 if (!aout_link_free_symbols (abfd))
3462 /* Given an a.out BFD, add symbols to the global hash table as
3466 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3468 switch (bfd_get_format (abfd))
3471 return aout_link_add_object_symbols (abfd, info);
3473 return _bfd_generic_link_add_archive_symbols
3474 (abfd, info, aout_link_check_archive_element);
3476 bfd_set_error (bfd_error_wrong_format);
3481 /* A hash table used for header files with N_BINCL entries. */
3483 struct aout_link_includes_table
3485 struct bfd_hash_table root;
3488 /* A linked list of totals that we have found for a particular header
3491 struct aout_link_includes_totals
3493 struct aout_link_includes_totals *next;
3497 /* An entry in the header file hash table. */
3499 struct aout_link_includes_entry
3501 struct bfd_hash_entry root;
3502 /* List of totals we have found for this file. */
3503 struct aout_link_includes_totals *totals;
3506 /* Look up an entry in an the header file hash table. */
3508 #define aout_link_includes_lookup(table, string, create, copy) \
3509 ((struct aout_link_includes_entry *) \
3510 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3512 /* During the final link step we need to pass around a bunch of
3513 information, so we do it in an instance of this structure. */
3515 struct aout_final_link_info
3517 /* General link information. */
3518 struct bfd_link_info *info;
3521 /* Reloc file positions. */
3522 file_ptr treloff, dreloff;
3523 /* File position of symbols. */
3526 struct bfd_strtab_hash *strtab;
3527 /* Header file hash table. */
3528 struct aout_link_includes_table includes;
3529 /* A buffer large enough to hold the contents of any section. */
3531 /* A buffer large enough to hold the relocs of any section. */
3533 /* A buffer large enough to hold the symbol map of any input BFD. */
3535 /* A buffer large enough to hold output symbols of any input BFD. */
3536 struct external_nlist *output_syms;
3539 /* The function to create a new entry in the header file hash table. */
3541 static struct bfd_hash_entry *
3542 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3543 struct bfd_hash_table *table,
3546 struct aout_link_includes_entry *ret =
3547 (struct aout_link_includes_entry *) entry;
3549 /* Allocate the structure if it has not already been allocated by a
3552 ret = (struct aout_link_includes_entry *)
3553 bfd_hash_allocate (table, sizeof (* ret));
3557 /* Call the allocation method of the superclass. */
3558 ret = ((struct aout_link_includes_entry *)
3559 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3562 /* Set local fields. */
3566 return (struct bfd_hash_entry *) ret;
3569 /* Write out a symbol that was not associated with an a.out input
3573 aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data)
3575 struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh;
3576 struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data;
3580 struct external_nlist outsym;
3584 if (h->root.type == bfd_link_hash_warning)
3586 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3587 if (h->root.type == bfd_link_hash_new)
3591 output_bfd = flaginfo->output_bfd;
3593 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3595 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3596 (output_bfd, flaginfo->info, h)))
3598 /* FIXME: No way to handle errors. */
3608 /* An indx of -2 means the symbol must be written. */
3610 && (flaginfo->info->strip == strip_all
3611 || (flaginfo->info->strip == strip_some
3612 && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string,
3613 FALSE, FALSE) == NULL)))
3616 switch (h->root.type)
3619 case bfd_link_hash_warning:
3621 /* Avoid variable not initialized warnings. */
3623 case bfd_link_hash_new:
3624 /* This can happen for set symbols when sets are not being
3627 case bfd_link_hash_undefined:
3628 type = N_UNDF | N_EXT;
3631 case bfd_link_hash_defined:
3632 case bfd_link_hash_defweak:
3636 sec = h->root.u.def.section->output_section;
3637 BFD_ASSERT (bfd_is_abs_section (sec)
3638 || sec->owner == output_bfd);
3639 if (sec == obj_textsec (output_bfd))
3640 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3641 else if (sec == obj_datasec (output_bfd))
3642 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3643 else if (sec == obj_bsssec (output_bfd))
3644 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3646 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3648 val = (h->root.u.def.value
3650 + h->root.u.def.section->output_offset);
3653 case bfd_link_hash_common:
3654 type = N_UNDF | N_EXT;
3655 val = h->root.u.c.size;
3657 case bfd_link_hash_undefweak:
3661 case bfd_link_hash_indirect:
3662 /* We ignore these symbols, since the indirected symbol is
3663 already in the hash table. */
3667 H_PUT_8 (output_bfd, type, outsym.e_type);
3668 H_PUT_8 (output_bfd, 0, outsym.e_other);
3669 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3670 indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string,
3672 if (indx == - (bfd_size_type) 1)
3673 /* FIXME: No way to handle errors. */
3676 PUT_WORD (output_bfd, indx, outsym.e_strx);
3677 PUT_WORD (output_bfd, val, outsym.e_value);
3679 amt = EXTERNAL_NLIST_SIZE;
3680 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0
3681 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3682 /* FIXME: No way to handle errors. */
3685 flaginfo->symoff += EXTERNAL_NLIST_SIZE;
3686 h->indx = obj_aout_external_sym_count (output_bfd);
3687 ++obj_aout_external_sym_count (output_bfd);
3692 /* Handle a link order which is supposed to generate a reloc. */
3695 aout_link_reloc_link_order (struct aout_final_link_info *flaginfo,
3697 struct bfd_link_order *p)
3699 struct bfd_link_order_reloc *pr;
3702 reloc_howto_type *howto;
3703 file_ptr *reloff_ptr = NULL;
3704 struct reloc_std_external srel;
3705 struct reloc_ext_external erel;
3711 if (p->type == bfd_section_reloc_link_order)
3714 if (bfd_is_abs_section (pr->u.section))
3715 r_index = N_ABS | N_EXT;
3718 BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd);
3719 r_index = pr->u.section->target_index;
3724 struct aout_link_hash_entry *h;
3726 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3728 h = ((struct aout_link_hash_entry *)
3729 bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info,
3730 pr->u.name, FALSE, FALSE, TRUE));
3736 /* We decided to strip this symbol, but it turns out that we
3737 can't. Note that we lose the other and desc information
3738 here. I don't think that will ever matter for a global
3742 if (!aout_link_write_other_symbol (&h->root.root, flaginfo))
3748 (*flaginfo->info->callbacks->unattached_reloc)
3749 (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0);
3754 howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc);
3757 bfd_set_error (bfd_error_bad_value);
3761 if (o == obj_textsec (flaginfo->output_bfd))
3762 reloff_ptr = &flaginfo->treloff;
3763 else if (o == obj_datasec (flaginfo->output_bfd))
3764 reloff_ptr = &flaginfo->dreloff;
3768 if (obj_reloc_entry_size (flaginfo->output_bfd) == RELOC_STD_SIZE)
3771 MY_put_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, howto,
3781 r_pcrel = (int) howto->pc_relative;
3782 r_baserel = (howto->type & 8) != 0;
3783 r_jmptable = (howto->type & 16) != 0;
3784 r_relative = (howto->type & 32) != 0;
3785 r_length = howto->size;
3787 PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address);
3788 if (bfd_header_big_endian (flaginfo->output_bfd))
3790 srel.r_index[0] = r_index >> 16;
3791 srel.r_index[1] = r_index >> 8;
3792 srel.r_index[2] = r_index;
3794 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3795 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3796 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3797 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3798 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3799 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3803 srel.r_index[2] = r_index >> 16;
3804 srel.r_index[1] = r_index >> 8;
3805 srel.r_index[0] = r_index;
3807 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3808 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3809 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3810 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3811 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3812 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3816 rel_ptr = (void *) &srel;
3818 /* We have to write the addend into the object file, since
3819 standard a.out relocs are in place. It would be more
3820 reliable if we had the current contents of the file here,
3821 rather than assuming zeroes, but we can't read the file since
3822 it was opened using bfd_openw. */
3823 if (pr->addend != 0)
3826 bfd_reloc_status_type r;
3830 size = bfd_get_reloc_size (howto);
3831 buf = (bfd_byte *) bfd_zmalloc (size);
3832 if (buf == NULL && size != 0)
3834 r = MY_relocate_contents (howto, flaginfo->output_bfd,
3835 (bfd_vma) pr->addend, buf);
3841 case bfd_reloc_outofrange:
3843 case bfd_reloc_overflow:
3844 (*flaginfo->info->callbacks->reloc_overflow)
3845 (flaginfo->info, NULL,
3846 (p->type == bfd_section_reloc_link_order
3847 ? bfd_section_name (flaginfo->output_bfd,
3850 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0);
3853 ok = bfd_set_section_contents (flaginfo->output_bfd, o, (void *) buf,
3854 (file_ptr) p->offset, size);
3862 #ifdef MY_put_ext_reloc
3863 MY_put_ext_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset,
3864 howto, &erel, pr->addend);
3866 PUT_WORD (flaginfo->output_bfd, p->offset, erel.r_address);
3868 if (bfd_header_big_endian (flaginfo->output_bfd))
3870 erel.r_index[0] = r_index >> 16;
3871 erel.r_index[1] = r_index >> 8;
3872 erel.r_index[2] = r_index;
3874 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3875 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3879 erel.r_index[2] = r_index >> 16;
3880 erel.r_index[1] = r_index >> 8;
3881 erel.r_index[0] = r_index;
3883 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3884 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3887 PUT_WORD (flaginfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3888 #endif /* MY_put_ext_reloc */
3890 rel_ptr = (void *) &erel;
3893 amt = obj_reloc_entry_size (flaginfo->output_bfd);
3894 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3895 || bfd_bwrite (rel_ptr, amt, flaginfo->output_bfd) != amt)
3898 *reloff_ptr += obj_reloc_entry_size (flaginfo->output_bfd);
3900 /* Assert that the relocs have not run into the symbols, and that n
3901 the text relocs have not run into the data relocs. */
3902 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
3903 && (reloff_ptr != &flaginfo->treloff
3905 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
3910 /* Get the section corresponding to a reloc index. */
3912 static INLINE asection *
3913 aout_reloc_index_to_section (bfd *abfd, int indx)
3915 switch (indx & N_TYPE)
3917 case N_TEXT: return obj_textsec (abfd);
3918 case N_DATA: return obj_datasec (abfd);
3919 case N_BSS: return obj_bsssec (abfd);
3921 case N_UNDF: return bfd_abs_section_ptr;
3927 /* Relocate an a.out section using standard a.out relocs. */
3930 aout_link_input_section_std (struct aout_final_link_info *flaginfo,
3932 asection *input_section,
3933 struct reloc_std_external *relocs,
3934 bfd_size_type rel_size,
3937 bfd_boolean (*check_dynamic_reloc)
3938 (struct bfd_link_info *, bfd *, asection *,
3939 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3942 bfd_boolean relocatable;
3943 struct external_nlist *syms;
3945 struct aout_link_hash_entry **sym_hashes;
3947 bfd_size_type reloc_count;
3948 struct reloc_std_external *rel;
3949 struct reloc_std_external *rel_end;
3951 output_bfd = flaginfo->output_bfd;
3952 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3954 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3955 BFD_ASSERT (input_bfd->xvec->header_byteorder
3956 == output_bfd->xvec->header_byteorder);
3958 relocatable = bfd_link_relocatable (flaginfo->info);
3959 syms = obj_aout_external_syms (input_bfd);
3960 strings = obj_aout_external_strings (input_bfd);
3961 sym_hashes = obj_aout_sym_hashes (input_bfd);
3962 symbol_map = flaginfo->symbol_map;
3964 reloc_count = rel_size / RELOC_STD_SIZE;
3966 rel_end = rel + reloc_count;
3967 for (; rel < rel_end; rel++)
3974 reloc_howto_type *howto;
3975 struct aout_link_hash_entry *h = NULL;
3977 bfd_reloc_status_type r;
3979 r_addr = GET_SWORD (input_bfd, rel->r_address);
3981 #ifdef MY_reloc_howto
3982 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
3988 unsigned int howto_idx;
3990 if (bfd_header_big_endian (input_bfd))
3992 r_index = (((unsigned int) rel->r_index[0] << 16)
3993 | ((unsigned int) rel->r_index[1] << 8)
3995 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
3996 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
3997 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
3998 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
3999 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4000 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4001 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4005 r_index = (((unsigned int) rel->r_index[2] << 16)
4006 | ((unsigned int) rel->r_index[1] << 8)
4008 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4009 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4010 r_baserel = (0 != (rel->r_type[0]
4011 & RELOC_STD_BITS_BASEREL_LITTLE));
4012 r_jmptable= (0 != (rel->r_type[0]
4013 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4014 r_relative= (0 != (rel->r_type[0]
4015 & RELOC_STD_BITS_RELATIVE_LITTLE));
4016 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4017 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4020 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4021 + 16 * r_jmptable + 32 * r_relative);
4022 if (howto_idx < TABLE_SIZE (howto_table_std))
4023 howto = howto_table_std + howto_idx;
4031 (*flaginfo->info->callbacks->einfo)
4032 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4033 bfd_set_error (bfd_error_bad_value);
4039 /* We are generating a relocatable output file, and must
4040 modify the reloc accordingly. */
4043 /* If we know the symbol this relocation is against,
4044 convert it into a relocation against a section. This
4045 is what the native linker does. */
4046 h = sym_hashes[r_index];
4048 && (h->root.type == bfd_link_hash_defined
4049 || h->root.type == bfd_link_hash_defweak))
4051 asection *output_section;
4053 /* Change the r_extern value. */
4054 if (bfd_header_big_endian (output_bfd))
4055 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4057 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4059 /* Compute a new r_index. */
4060 output_section = h->root.u.def.section->output_section;
4061 if (output_section == obj_textsec (output_bfd))
4063 else if (output_section == obj_datasec (output_bfd))
4065 else if (output_section == obj_bsssec (output_bfd))
4070 /* Add the symbol value and the section VMA to the
4071 addend stored in the contents. */
4072 relocation = (h->root.u.def.value
4073 + output_section->vma
4074 + h->root.u.def.section->output_offset);
4078 /* We must change r_index according to the symbol
4080 r_index = symbol_map[r_index];
4086 /* We decided to strip this symbol, but it
4087 turns out that we can't. Note that we
4088 lose the other and desc information here.
4089 I don't think that will ever matter for a
4095 if (!aout_link_write_other_symbol (&h->root.root,
4105 name = strings + GET_WORD (input_bfd,
4106 syms[r_index].e_strx);
4107 (*flaginfo->info->callbacks->unattached_reloc)
4108 (flaginfo->info, name,
4109 input_bfd, input_section, r_addr);
4117 /* Write out the new r_index value. */
4118 if (bfd_header_big_endian (output_bfd))
4120 rel->r_index[0] = r_index >> 16;
4121 rel->r_index[1] = r_index >> 8;
4122 rel->r_index[2] = r_index;
4126 rel->r_index[2] = r_index >> 16;
4127 rel->r_index[1] = r_index >> 8;
4128 rel->r_index[0] = r_index;
4135 /* This is a relocation against a section. We must
4136 adjust by the amount that the section moved. */
4137 section = aout_reloc_index_to_section (input_bfd, r_index);
4138 relocation = (section->output_section->vma
4139 + section->output_offset
4143 /* Change the address of the relocation. */
4144 PUT_WORD (output_bfd,
4145 r_addr + input_section->output_offset,
4148 /* Adjust a PC relative relocation by removing the reference
4149 to the original address in the section and including the
4150 reference to the new address. */
4152 relocation -= (input_section->output_section->vma
4153 + input_section->output_offset
4154 - input_section->vma);
4156 #ifdef MY_relocatable_reloc
4157 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4160 if (relocation == 0)
4163 r = MY_relocate_contents (howto,
4164 input_bfd, relocation,
4171 /* We are generating an executable, and must do a full
4177 h = sym_hashes[r_index];
4180 && (h->root.type == bfd_link_hash_defined
4181 || h->root.type == bfd_link_hash_defweak))
4183 relocation = (h->root.u.def.value
4184 + h->root.u.def.section->output_section->vma
4185 + h->root.u.def.section->output_offset);
4188 && h->root.type == bfd_link_hash_undefweak)
4200 section = aout_reloc_index_to_section (input_bfd, r_index);
4201 relocation = (section->output_section->vma
4202 + section->output_offset
4205 relocation += input_section->vma;
4208 if (check_dynamic_reloc != NULL)
4212 if (! ((*check_dynamic_reloc)
4213 (flaginfo->info, input_bfd, input_section, h,
4214 (void *) rel, contents, &skip, &relocation)))
4220 /* Now warn if a global symbol is undefined. We could not
4221 do this earlier, because check_dynamic_reloc might want
4222 to skip this reloc. */
4223 if (hundef && ! bfd_link_pic (flaginfo->info) && ! r_baserel)
4228 name = h->root.root.string;
4230 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4231 (*flaginfo->info->callbacks->undefined_symbol)
4232 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE);
4235 r = MY_final_link_relocate (howto,
4236 input_bfd, input_section,
4237 contents, r_addr, relocation,
4241 if (r != bfd_reloc_ok)
4246 case bfd_reloc_outofrange:
4248 case bfd_reloc_overflow:
4255 name = strings + GET_WORD (input_bfd,
4256 syms[r_index].e_strx);
4261 s = aout_reloc_index_to_section (input_bfd, r_index);
4262 name = bfd_section_name (input_bfd, s);
4264 (*flaginfo->info->callbacks->reloc_overflow)
4265 (flaginfo->info, (h ? &h->root : NULL), name, howto->name,
4266 (bfd_vma) 0, input_bfd, input_section, r_addr);
4276 /* Relocate an a.out section using extended a.out relocs. */
4279 aout_link_input_section_ext (struct aout_final_link_info *flaginfo,
4281 asection *input_section,
4282 struct reloc_ext_external *relocs,
4283 bfd_size_type rel_size,
4286 bfd_boolean (*check_dynamic_reloc)
4287 (struct bfd_link_info *, bfd *, asection *,
4288 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4291 bfd_boolean relocatable;
4292 struct external_nlist *syms;
4294 struct aout_link_hash_entry **sym_hashes;
4296 bfd_size_type reloc_count;
4297 struct reloc_ext_external *rel;
4298 struct reloc_ext_external *rel_end;
4300 output_bfd = flaginfo->output_bfd;
4301 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4303 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4304 BFD_ASSERT (input_bfd->xvec->header_byteorder
4305 == output_bfd->xvec->header_byteorder);
4307 relocatable = bfd_link_relocatable (flaginfo->info);
4308 syms = obj_aout_external_syms (input_bfd);
4309 strings = obj_aout_external_strings (input_bfd);
4310 sym_hashes = obj_aout_sym_hashes (input_bfd);
4311 symbol_map = flaginfo->symbol_map;
4313 reloc_count = rel_size / RELOC_EXT_SIZE;
4315 rel_end = rel + reloc_count;
4316 for (; rel < rel_end; rel++)
4321 unsigned int r_type;
4323 struct aout_link_hash_entry *h = NULL;
4324 asection *r_section = NULL;
4327 r_addr = GET_SWORD (input_bfd, rel->r_address);
4329 if (bfd_header_big_endian (input_bfd))
4331 r_index = (((unsigned int) rel->r_index[0] << 16)
4332 | ((unsigned int) rel->r_index[1] << 8)
4334 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4335 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4336 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4340 r_index = (((unsigned int) rel->r_index[2] << 16)
4341 | ((unsigned int) rel->r_index[1] << 8)
4343 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4344 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4345 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4348 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4350 if (r_type >= TABLE_SIZE (howto_table_ext))
4352 (*flaginfo->info->callbacks->einfo)
4353 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4354 bfd_set_error (bfd_error_bad_value);
4360 /* We are generating a relocatable output file, and must
4361 modify the reloc accordingly. */
4363 || r_type == (unsigned int) RELOC_BASE10
4364 || r_type == (unsigned int) RELOC_BASE13
4365 || r_type == (unsigned int) RELOC_BASE22)
4367 /* If we know the symbol this relocation is against,
4368 convert it into a relocation against a section. This
4369 is what the native linker does. */
4370 if (r_type == (unsigned int) RELOC_BASE10
4371 || r_type == (unsigned int) RELOC_BASE13
4372 || r_type == (unsigned int) RELOC_BASE22)
4375 h = sym_hashes[r_index];
4377 && (h->root.type == bfd_link_hash_defined
4378 || h->root.type == bfd_link_hash_defweak))
4380 asection *output_section;
4382 /* Change the r_extern value. */
4383 if (bfd_header_big_endian (output_bfd))
4384 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4386 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4388 /* Compute a new r_index. */
4389 output_section = h->root.u.def.section->output_section;
4390 if (output_section == obj_textsec (output_bfd))
4392 else if (output_section == obj_datasec (output_bfd))
4394 else if (output_section == obj_bsssec (output_bfd))
4399 /* Add the symbol value and the section VMA to the
4401 relocation = (h->root.u.def.value
4402 + output_section->vma
4403 + h->root.u.def.section->output_offset);
4405 /* Now RELOCATION is the VMA of the final
4406 destination. If this is a PC relative reloc,
4407 then ADDEND is the negative of the source VMA.
4408 We want to set ADDEND to the difference between
4409 the destination VMA and the source VMA, which
4410 means we must adjust RELOCATION by the change in
4411 the source VMA. This is done below. */
4415 /* We must change r_index according to the symbol
4417 r_index = symbol_map[r_index];
4423 /* We decided to strip this symbol, but it
4424 turns out that we can't. Note that we
4425 lose the other and desc information here.
4426 I don't think that will ever matter for a
4432 if (!aout_link_write_other_symbol (&h->root.root,
4442 name = strings + GET_WORD (input_bfd,
4443 syms[r_index].e_strx);
4444 (*flaginfo->info->callbacks->unattached_reloc)
4445 (flaginfo->info, name,
4446 input_bfd, input_section, r_addr);
4453 /* If this is a PC relative reloc, then the addend
4454 is the negative of the source VMA. We must
4455 adjust it by the change in the source VMA. This
4459 /* Write out the new r_index value. */
4460 if (bfd_header_big_endian (output_bfd))
4462 rel->r_index[0] = r_index >> 16;
4463 rel->r_index[1] = r_index >> 8;
4464 rel->r_index[2] = r_index;
4468 rel->r_index[2] = r_index >> 16;
4469 rel->r_index[1] = r_index >> 8;
4470 rel->r_index[0] = r_index;
4475 /* This is a relocation against a section. We must
4476 adjust by the amount that the section moved. */
4477 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4478 relocation = (r_section->output_section->vma
4479 + r_section->output_offset
4482 /* If this is a PC relative reloc, then the addend is
4483 the difference in VMA between the destination and the
4484 source. We have just adjusted for the change in VMA
4485 of the destination, so we must also adjust by the
4486 change in VMA of the source. This is done below. */
4489 /* As described above, we must always adjust a PC relative
4490 reloc by the change in VMA of the source. However, if
4491 pcrel_offset is set, then the addend does not include the
4492 location within the section, in which case we don't need
4493 to adjust anything. */
4494 if (howto_table_ext[r_type].pc_relative
4495 && ! howto_table_ext[r_type].pcrel_offset)
4496 relocation -= (input_section->output_section->vma
4497 + input_section->output_offset
4498 - input_section->vma);
4500 /* Change the addend if necessary. */
4501 if (relocation != 0)
4502 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4504 /* Change the address of the relocation. */
4505 PUT_WORD (output_bfd,
4506 r_addr + input_section->output_offset,
4512 bfd_reloc_status_type r;
4514 /* We are generating an executable, and must do a full
4520 h = sym_hashes[r_index];
4523 && (h->root.type == bfd_link_hash_defined
4524 || h->root.type == bfd_link_hash_defweak))
4526 relocation = (h->root.u.def.value
4527 + h->root.u.def.section->output_section->vma
4528 + h->root.u.def.section->output_offset);
4531 && h->root.type == bfd_link_hash_undefweak)
4539 else if (r_type == (unsigned int) RELOC_BASE10
4540 || r_type == (unsigned int) RELOC_BASE13
4541 || r_type == (unsigned int) RELOC_BASE22)
4543 struct external_nlist *sym;
4546 /* For base relative relocs, r_index is always an index
4547 into the symbol table, even if r_extern is 0. */
4548 sym = syms + r_index;
4549 type = H_GET_8 (input_bfd, sym->e_type);
4550 if ((type & N_TYPE) == N_TEXT
4552 r_section = obj_textsec (input_bfd);
4553 else if ((type & N_TYPE) == N_DATA
4555 r_section = obj_datasec (input_bfd);
4556 else if ((type & N_TYPE) == N_BSS
4558 r_section = obj_bsssec (input_bfd);
4559 else if ((type & N_TYPE) == N_ABS
4561 r_section = bfd_abs_section_ptr;
4564 relocation = (r_section->output_section->vma
4565 + r_section->output_offset
4566 + (GET_WORD (input_bfd, sym->e_value)
4571 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4573 /* If this is a PC relative reloc, then R_ADDEND is the
4574 difference between the two vmas, or
4575 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4577 old_dest_sec == section->vma
4579 old_src_sec == input_section->vma
4581 old_src_off == r_addr
4583 _bfd_final_link_relocate expects RELOCATION +
4584 R_ADDEND to be the VMA of the destination minus
4585 r_addr (the minus r_addr is because this relocation
4586 is not pcrel_offset, which is a bit confusing and
4587 should, perhaps, be changed), or
4590 new_dest_sec == output_section->vma + output_offset
4591 We arrange for this to happen by setting RELOCATION to
4592 new_dest_sec + old_src_sec - old_dest_sec
4594 If this is not a PC relative reloc, then R_ADDEND is
4595 simply the VMA of the destination, so we set
4596 RELOCATION to the change in the destination VMA, or
4597 new_dest_sec - old_dest_sec
4599 relocation = (r_section->output_section->vma
4600 + r_section->output_offset
4602 if (howto_table_ext[r_type].pc_relative)
4603 relocation += input_section->vma;
4606 if (check_dynamic_reloc != NULL)
4610 if (! ((*check_dynamic_reloc)
4611 (flaginfo->info, input_bfd, input_section, h,
4612 (void *) rel, contents, &skip, &relocation)))
4618 /* Now warn if a global symbol is undefined. We could not
4619 do this earlier, because check_dynamic_reloc might want
4620 to skip this reloc. */
4622 && ! bfd_link_pic (flaginfo->info)
4623 && r_type != (unsigned int) RELOC_BASE10
4624 && r_type != (unsigned int) RELOC_BASE13
4625 && r_type != (unsigned int) RELOC_BASE22)
4630 name = h->root.root.string;
4632 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4633 (*flaginfo->info->callbacks->undefined_symbol)
4634 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE);
4637 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4638 r = MY_final_link_relocate (howto_table_ext + r_type,
4639 input_bfd, input_section,
4640 contents, r_addr, relocation,
4646 x = bfd_get_32 (input_bfd, contents + r_addr);
4647 x = x + relocation + r_addend;
4648 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4652 if (r != bfd_reloc_ok)
4657 case bfd_reloc_outofrange:
4659 case bfd_reloc_overflow:
4666 || r_type == (unsigned int) RELOC_BASE10
4667 || r_type == (unsigned int) RELOC_BASE13
4668 || r_type == (unsigned int) RELOC_BASE22)
4669 name = strings + GET_WORD (input_bfd,
4670 syms[r_index].e_strx);
4675 s = aout_reloc_index_to_section (input_bfd, r_index);
4676 name = bfd_section_name (input_bfd, s);
4678 (*flaginfo->info->callbacks->reloc_overflow)
4679 (flaginfo->info, (h ? &h->root : NULL), name,
4680 howto_table_ext[r_type].name,
4681 r_addend, input_bfd, input_section, r_addr);
4692 /* Link an a.out section into the output file. */
4695 aout_link_input_section (struct aout_final_link_info *flaginfo,
4697 asection *input_section,
4698 file_ptr *reloff_ptr,
4699 bfd_size_type rel_size)
4701 bfd_size_type input_size;
4704 /* Get the section contents. */
4705 input_size = input_section->size;
4706 if (! bfd_get_section_contents (input_bfd, input_section,
4707 (void *) flaginfo->contents,
4708 (file_ptr) 0, input_size))
4711 /* Read in the relocs if we haven't already done it. */
4712 if (aout_section_data (input_section) != NULL
4713 && aout_section_data (input_section)->relocs != NULL)
4714 relocs = aout_section_data (input_section)->relocs;
4717 relocs = flaginfo->relocs;
4720 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4721 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4726 /* Relocate the section contents. */
4727 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4729 if (! aout_link_input_section_std (flaginfo, input_bfd, input_section,
4730 (struct reloc_std_external *) relocs,
4731 rel_size, flaginfo->contents))
4736 if (! aout_link_input_section_ext (flaginfo, input_bfd, input_section,
4737 (struct reloc_ext_external *) relocs,
4738 rel_size, flaginfo->contents))
4742 /* Write out the section contents. */
4743 if (! bfd_set_section_contents (flaginfo->output_bfd,
4744 input_section->output_section,
4745 (void *) flaginfo->contents,
4746 (file_ptr) input_section->output_offset,
4750 /* If we are producing relocatable output, the relocs were
4751 modified, and we now write them out. */
4752 if (bfd_link_relocatable (flaginfo->info) && rel_size > 0)
4754 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4756 if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size)
4758 *reloff_ptr += rel_size;
4760 /* Assert that the relocs have not run into the symbols, and
4761 that if these are the text relocs they have not run into the
4763 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
4764 && (reloff_ptr != &flaginfo->treloff
4766 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
4772 /* Adjust and write out the symbols for an a.out file. Set the new
4773 symbol indices into a symbol_map. */
4776 aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd)
4779 bfd_size_type sym_count;
4781 enum bfd_link_strip strip;
4782 enum bfd_link_discard discard;
4783 struct external_nlist *outsym;
4784 bfd_size_type strtab_index;
4785 struct external_nlist *sym;
4786 struct external_nlist *sym_end;
4787 struct aout_link_hash_entry **sym_hash;
4790 bfd_boolean skip_next;
4792 output_bfd = flaginfo->output_bfd;
4793 sym_count = obj_aout_external_sym_count (input_bfd);
4794 strings = obj_aout_external_strings (input_bfd);
4795 strip = flaginfo->info->strip;
4796 discard = flaginfo->info->discard;
4797 outsym = flaginfo->output_syms;
4799 /* First write out a symbol for this object file, unless we are
4800 discarding such symbols. */
4801 if (strip != strip_all
4802 && (strip != strip_some
4803 || bfd_hash_lookup (flaginfo->info->keep_hash, input_bfd->filename,
4804 FALSE, FALSE) != NULL)
4805 && discard != discard_all)
4807 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4808 H_PUT_8 (output_bfd, 0, outsym->e_other);
4809 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4810 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
4811 input_bfd->filename, FALSE);
4812 if (strtab_index == (bfd_size_type) -1)
4814 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4815 PUT_WORD (output_bfd,
4816 (bfd_get_section_vma (output_bfd,
4817 obj_textsec (input_bfd)->output_section)
4818 + obj_textsec (input_bfd)->output_offset),
4820 ++obj_aout_external_sym_count (output_bfd);
4826 sym = obj_aout_external_syms (input_bfd);
4827 sym_end = sym + sym_count;
4828 sym_hash = obj_aout_sym_hashes (input_bfd);
4829 symbol_map = flaginfo->symbol_map;
4830 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4831 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4835 struct aout_link_hash_entry *h;
4841 /* We set *symbol_map to 0 above for all symbols. If it has
4842 already been set to -1 for this symbol, it means that we are
4843 discarding it because it appears in a duplicate header file.
4844 See the N_BINCL code below. */
4845 if (*symbol_map == -1)
4848 /* Initialize *symbol_map to -1, which means that the symbol was
4849 not copied into the output file. We will change it later if
4850 we do copy the symbol over. */
4853 type = H_GET_8 (input_bfd, sym->e_type);
4854 name = strings + GET_WORD (input_bfd, sym->e_strx);
4860 /* Pass this symbol through. It is the target of an
4861 indirect or warning symbol. */
4862 val = GET_WORD (input_bfd, sym->e_value);
4867 /* Skip this symbol, which is the target of an indirect
4868 symbol that we have changed to no longer be an indirect
4875 struct aout_link_hash_entry *hresolve;
4877 /* We have saved the hash table entry for this symbol, if
4878 there is one. Note that we could just look it up again
4879 in the hash table, provided we first check that it is an
4883 /* Use the name from the hash table, in case the symbol was
4886 && h->root.type != bfd_link_hash_warning)
4887 name = h->root.root.string;
4889 /* If this is an indirect or warning symbol, then change
4890 hresolve to the base symbol. We also change *sym_hash so
4891 that the relocation routines relocate against the real
4894 if (h != (struct aout_link_hash_entry *) NULL
4895 && (h->root.type == bfd_link_hash_indirect
4896 || h->root.type == bfd_link_hash_warning))
4898 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4899 while (hresolve->root.type == bfd_link_hash_indirect
4900 || hresolve->root.type == bfd_link_hash_warning)
4901 hresolve = ((struct aout_link_hash_entry *)
4902 hresolve->root.u.i.link);
4903 *sym_hash = hresolve;
4906 /* If the symbol has already been written out, skip it. */
4910 if ((type & N_TYPE) == N_INDR
4911 || type == N_WARNING)
4913 *symbol_map = h->indx;
4917 /* See if we are stripping this symbol. */
4923 case strip_debugger:
4924 if ((type & N_STAB) != 0)
4928 if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE)
4943 /* Get the value of the symbol. */
4944 if ((type & N_TYPE) == N_TEXT
4946 symsec = obj_textsec (input_bfd);
4947 else if ((type & N_TYPE) == N_DATA
4949 symsec = obj_datasec (input_bfd);
4950 else if ((type & N_TYPE) == N_BSS
4952 symsec = obj_bsssec (input_bfd);
4953 else if ((type & N_TYPE) == N_ABS
4955 symsec = bfd_abs_section_ptr;
4956 else if (((type & N_TYPE) == N_INDR
4957 && (hresolve == NULL
4958 || (hresolve->root.type != bfd_link_hash_defined
4959 && hresolve->root.type != bfd_link_hash_defweak
4960 && hresolve->root.type != bfd_link_hash_common)))
4961 || type == N_WARNING)
4963 /* Pass the next symbol through unchanged. The
4964 condition above for indirect symbols is so that if
4965 the indirect symbol was defined, we output it with
4966 the correct definition so the debugger will
4969 val = GET_WORD (input_bfd, sym->e_value);
4972 else if ((type & N_STAB) != 0)
4974 val = GET_WORD (input_bfd, sym->e_value);
4979 /* If we get here with an indirect symbol, it means that
4980 we are outputting it with a real definition. In such
4981 a case we do not want to output the next symbol,
4982 which is the target of the indirection. */
4983 if ((type & N_TYPE) == N_INDR)
4988 /* We need to get the value from the hash table. We use
4989 hresolve so that if we have defined an indirect
4990 symbol we output the final definition. */
4993 switch (type & N_TYPE)
4996 symsec = obj_textsec (input_bfd);
4999 symsec = obj_datasec (input_bfd);
5002 symsec = obj_bsssec (input_bfd);
5005 symsec = bfd_abs_section_ptr;
5012 else if (hresolve->root.type == bfd_link_hash_defined
5013 || hresolve->root.type == bfd_link_hash_defweak)
5015 asection *input_section;
5016 asection *output_section;
5018 /* This case usually means a common symbol which was
5019 turned into a defined symbol. */
5020 input_section = hresolve->root.u.def.section;
5021 output_section = input_section->output_section;
5022 BFD_ASSERT (bfd_is_abs_section (output_section)
5023 || output_section->owner == output_bfd);
5024 val = (hresolve->root.u.def.value
5025 + bfd_get_section_vma (output_bfd, output_section)
5026 + input_section->output_offset);
5028 /* Get the correct type based on the section. If
5029 this is a constructed set, force it to be
5030 globally visible. */
5039 if (output_section == obj_textsec (output_bfd))
5040 type |= (hresolve->root.type == bfd_link_hash_defined
5043 else if (output_section == obj_datasec (output_bfd))
5044 type |= (hresolve->root.type == bfd_link_hash_defined
5047 else if (output_section == obj_bsssec (output_bfd))
5048 type |= (hresolve->root.type == bfd_link_hash_defined
5052 type |= (hresolve->root.type == bfd_link_hash_defined
5056 else if (hresolve->root.type == bfd_link_hash_common)
5057 val = hresolve->root.u.c.size;
5058 else if (hresolve->root.type == bfd_link_hash_undefweak)
5067 val = (symsec->output_section->vma
5068 + symsec->output_offset
5069 + (GET_WORD (input_bfd, sym->e_value)
5072 /* If this is a global symbol set the written flag, and if
5073 it is a local symbol see if we should discard it. */
5077 h->indx = obj_aout_external_sym_count (output_bfd);
5079 else if ((type & N_TYPE) != N_SETT
5080 && (type & N_TYPE) != N_SETD
5081 && (type & N_TYPE) != N_SETB
5082 && (type & N_TYPE) != N_SETA)
5087 case discard_sec_merge:
5090 if ((type & N_STAB) == 0
5091 && bfd_is_local_label_name (input_bfd, name))
5105 /* An N_BINCL symbol indicates the start of the stabs
5106 entries for a header file. We need to scan ahead to the
5107 next N_EINCL symbol, ignoring nesting, adding up all the
5108 characters in the symbol names, not including the file
5109 numbers in types (the first number after an open
5111 if (type == (int) N_BINCL)
5113 struct external_nlist *incl_sym;
5115 struct aout_link_includes_entry *incl_entry;
5116 struct aout_link_includes_totals *t;
5120 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5124 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5125 if (incl_type == (int) N_EINCL)
5131 else if (incl_type == (int) N_BINCL)
5137 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5138 for (; *s != '\0'; s++)
5143 /* Skip the file number. */
5145 while (ISDIGIT (*s))
5153 /* If we have already included a header file with the
5154 same value, then replace this one with an N_EXCL
5156 copy = (bfd_boolean) (! flaginfo->info->keep_memory);
5157 incl_entry = aout_link_includes_lookup (&flaginfo->includes,
5159 if (incl_entry == NULL)
5161 for (t = incl_entry->totals; t != NULL; t = t->next)
5162 if (t->total == val)
5166 /* This is the first time we have seen this header
5167 file with this set of stabs strings. */
5168 t = (struct aout_link_includes_totals *)
5169 bfd_hash_allocate (&flaginfo->includes.root,
5174 t->next = incl_entry->totals;
5175 incl_entry->totals = t;
5181 /* This is a duplicate header file. We must change
5182 it to be an N_EXCL entry, and mark all the
5183 included symbols to prevent outputting them. */
5184 type = (int) N_EXCL;
5187 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5189 incl_sym++, incl_map++)
5193 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5194 if (incl_type == (int) N_EINCL)
5203 else if (incl_type == (int) N_BINCL)
5212 /* Copy this symbol into the list of symbols we are going to
5214 H_PUT_8 (output_bfd, type, outsym->e_type);
5215 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5216 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5218 if (! flaginfo->info->keep_memory)
5220 /* name points into a string table which we are going to
5221 free. If there is a hash table entry, use that string.
5222 Otherwise, copy name into memory. */
5224 name = h->root.root.string;
5228 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
5230 if (strtab_index == (bfd_size_type) -1)
5232 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5233 PUT_WORD (output_bfd, val, outsym->e_value);
5234 *symbol_map = obj_aout_external_sym_count (output_bfd);
5235 ++obj_aout_external_sym_count (output_bfd);
5239 /* Write out the output symbols we have just constructed. */
5240 if (outsym > flaginfo->output_syms)
5242 bfd_size_type outsym_size;
5244 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0)
5246 outsym_size = outsym - flaginfo->output_syms;
5247 outsym_size *= EXTERNAL_NLIST_SIZE;
5248 if (bfd_bwrite ((void *) flaginfo->output_syms, outsym_size, output_bfd)
5251 flaginfo->symoff += outsym_size;
5257 /* Link an a.out input BFD into the output file. */
5260 aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd)
5262 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5264 /* If this is a dynamic object, it may need special handling. */
5265 if ((input_bfd->flags & DYNAMIC) != 0
5266 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5267 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5268 (flaginfo->info, input_bfd));
5270 /* Get the symbols. We probably have them already, unless
5271 flaginfo->info->keep_memory is FALSE. */
5272 if (! aout_get_external_symbols (input_bfd))
5275 /* Write out the symbols and get a map of the new indices. The map
5276 is placed into flaginfo->symbol_map. */
5277 if (! aout_link_write_symbols (flaginfo, input_bfd))
5280 /* Relocate and write out the sections. These functions use the
5281 symbol map created by aout_link_write_symbols. The linker_mark
5282 field will be set if these sections are to be included in the
5283 link, which will normally be the case. */
5284 if (obj_textsec (input_bfd)->linker_mark)
5286 if (! aout_link_input_section (flaginfo, input_bfd,
5287 obj_textsec (input_bfd),
5289 exec_hdr (input_bfd)->a_trsize))
5292 if (obj_datasec (input_bfd)->linker_mark)
5294 if (! aout_link_input_section (flaginfo, input_bfd,
5295 obj_datasec (input_bfd),
5297 exec_hdr (input_bfd)->a_drsize))
5301 /* If we are not keeping memory, we don't need the symbols any
5302 longer. We still need them if we are keeping memory, because the
5303 strings in the hash table point into them. */
5304 if (! flaginfo->info->keep_memory)
5306 if (! aout_link_free_symbols (input_bfd))
5313 /* Do the final link step. This is called on the output BFD. The
5314 INFO structure should point to a list of BFDs linked through the
5315 link.next field which can be used to find each BFD which takes part
5316 in the output. Also, each section in ABFD should point to a list
5317 of bfd_link_order structures which list all the input sections for
5318 the output section. */
5321 NAME (aout, final_link) (bfd *abfd,
5322 struct bfd_link_info *info,
5323 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5325 struct aout_final_link_info aout_info;
5326 bfd_boolean includes_hash_initialized = FALSE;
5328 bfd_size_type trsize, drsize;
5329 bfd_size_type max_contents_size;
5330 bfd_size_type max_relocs_size;
5331 bfd_size_type max_sym_count;
5332 struct bfd_link_order *p;
5334 bfd_boolean have_link_order_relocs;
5336 if (bfd_link_pic (info))
5337 abfd->flags |= DYNAMIC;
5339 aout_info.info = info;
5340 aout_info.output_bfd = abfd;
5341 aout_info.contents = NULL;
5342 aout_info.relocs = NULL;
5343 aout_info.symbol_map = NULL;
5344 aout_info.output_syms = NULL;
5346 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5347 aout_link_includes_newfunc,
5348 sizeof (struct aout_link_includes_entry),
5351 includes_hash_initialized = TRUE;
5353 /* Figure out the largest section size. Also, if generating
5354 relocatable output, count the relocs. */
5357 max_contents_size = 0;
5358 max_relocs_size = 0;
5360 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5364 if (bfd_link_relocatable (info))
5366 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5368 trsize += exec_hdr (sub)->a_trsize;
5369 drsize += exec_hdr (sub)->a_drsize;
5373 /* FIXME: We need to identify the .text and .data sections
5374 and call get_reloc_upper_bound and canonicalize_reloc to
5375 work out the number of relocs needed, and then multiply
5376 by the reloc size. */
5377 (*_bfd_error_handler)
5378 (_("%s: relocatable link from %s to %s not supported"),
5379 bfd_get_filename (abfd),
5380 sub->xvec->name, abfd->xvec->name);
5381 bfd_set_error (bfd_error_invalid_operation);
5386 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5388 sz = obj_textsec (sub)->size;
5389 if (sz > max_contents_size)
5390 max_contents_size = sz;
5391 sz = obj_datasec (sub)->size;
5392 if (sz > max_contents_size)
5393 max_contents_size = sz;
5395 sz = exec_hdr (sub)->a_trsize;
5396 if (sz > max_relocs_size)
5397 max_relocs_size = sz;
5398 sz = exec_hdr (sub)->a_drsize;
5399 if (sz > max_relocs_size)
5400 max_relocs_size = sz;
5402 sz = obj_aout_external_sym_count (sub);
5403 if (sz > max_sym_count)
5408 if (bfd_link_relocatable (info))
5410 if (obj_textsec (abfd) != NULL)
5411 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5412 ->map_head.link_order)
5413 * obj_reloc_entry_size (abfd));
5414 if (obj_datasec (abfd) != NULL)
5415 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5416 ->map_head.link_order)
5417 * obj_reloc_entry_size (abfd));
5420 exec_hdr (abfd)->a_trsize = trsize;
5421 exec_hdr (abfd)->a_drsize = drsize;
5423 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5425 /* Adjust the section sizes and vmas according to the magic number.
5426 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5427 filepos for each section. */
5428 if (! NAME (aout, adjust_sizes_and_vmas) (abfd))
5431 /* The relocation and symbol file positions differ among a.out
5432 targets. We are passed a callback routine from the backend
5433 specific code to handle this.
5434 FIXME: At this point we do not know how much space the symbol
5435 table will require. This will not work for any (nonstandard)
5436 a.out target that needs to know the symbol table size before it
5437 can compute the relocation file positions. This may or may not
5438 be the case for the hp300hpux target, for example. */
5439 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5441 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5442 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5443 obj_sym_filepos (abfd) = aout_info.symoff;
5445 /* We keep a count of the symbols as we output them. */
5446 obj_aout_external_sym_count (abfd) = 0;
5448 /* We accumulate the string table as we write out the symbols. */
5449 aout_info.strtab = _bfd_stringtab_init ();
5450 if (aout_info.strtab == NULL)
5453 /* Allocate buffers to hold section contents and relocs. */
5454 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
5455 aout_info.relocs = bfd_malloc (max_relocs_size);
5456 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int));
5457 aout_info.output_syms = (struct external_nlist *)
5458 bfd_malloc ((max_sym_count + 1) * sizeof (struct external_nlist));
5459 if ((aout_info.contents == NULL && max_contents_size != 0)
5460 || (aout_info.relocs == NULL && max_relocs_size != 0)
5461 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5462 || aout_info.output_syms == NULL)
5465 /* If we have a symbol named __DYNAMIC, force it out now. This is
5466 required by SunOS. Doing this here rather than in sunos.c is a
5467 hack, but it's easier than exporting everything which would be
5470 struct aout_link_hash_entry *h;
5472 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5473 FALSE, FALSE, FALSE);
5475 aout_link_write_other_symbol (&h->root.root, &aout_info);
5478 /* The most time efficient way to do the link would be to read all
5479 the input object files into memory and then sort out the
5480 information into the output file. Unfortunately, that will
5481 probably use too much memory. Another method would be to step
5482 through everything that composes the text section and write it
5483 out, and then everything that composes the data section and write
5484 it out, and then write out the relocs, and then write out the
5485 symbols. Unfortunately, that requires reading stuff from each
5486 input file several times, and we will not be able to keep all the
5487 input files open simultaneously, and reopening them will be slow.
5489 What we do is basically process one input file at a time. We do
5490 everything we need to do with an input file once--copy over the
5491 section contents, handle the relocation information, and write
5492 out the symbols--and then we throw away the information we read
5493 from it. This approach requires a lot of lseeks of the output
5494 file, which is unfortunate but still faster than reopening a lot
5497 We use the output_has_begun field of the input BFDs to see
5498 whether we have already handled it. */
5499 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5500 sub->output_has_begun = FALSE;
5502 /* Mark all sections which are to be included in the link. This
5503 will normally be every section. We need to do this so that we
5504 can identify any sections which the linker has decided to not
5506 for (o = abfd->sections; o != NULL; o = o->next)
5508 for (p = o->map_head.link_order; p != NULL; p = p->next)
5509 if (p->type == bfd_indirect_link_order)
5510 p->u.indirect.section->linker_mark = TRUE;
5513 have_link_order_relocs = FALSE;
5514 for (o = abfd->sections; o != NULL; o = o->next)
5516 for (p = o->map_head.link_order;
5520 if (p->type == bfd_indirect_link_order
5521 && (bfd_get_flavour (p->u.indirect.section->owner)
5522 == bfd_target_aout_flavour))
5526 input_bfd = p->u.indirect.section->owner;
5527 if (! input_bfd->output_has_begun)
5529 if (! aout_link_input_bfd (&aout_info, input_bfd))
5531 input_bfd->output_has_begun = TRUE;
5534 else if (p->type == bfd_section_reloc_link_order
5535 || p->type == bfd_symbol_reloc_link_order)
5537 /* These are handled below. */
5538 have_link_order_relocs = TRUE;
5542 if (! _bfd_default_link_order (abfd, info, o, p))
5548 /* Write out any symbols that we have not already written out. */
5549 bfd_hash_traverse (&info->hash->table,
5550 aout_link_write_other_symbol,
5553 /* Now handle any relocs we were asked to create by the linker.
5554 These did not come from any input file. We must do these after
5555 we have written out all the symbols, so that we know the symbol
5557 if (have_link_order_relocs)
5559 for (o = abfd->sections; o != NULL; o = o->next)
5561 for (p = o->map_head.link_order;
5565 if (p->type == bfd_section_reloc_link_order
5566 || p->type == bfd_symbol_reloc_link_order)
5568 if (! aout_link_reloc_link_order (&aout_info, o, p))
5575 if (aout_info.contents != NULL)
5577 free (aout_info.contents);
5578 aout_info.contents = NULL;
5580 if (aout_info.relocs != NULL)
5582 free (aout_info.relocs);
5583 aout_info.relocs = NULL;
5585 if (aout_info.symbol_map != NULL)
5587 free (aout_info.symbol_map);
5588 aout_info.symbol_map = NULL;
5590 if (aout_info.output_syms != NULL)
5592 free (aout_info.output_syms);
5593 aout_info.output_syms = NULL;
5595 if (includes_hash_initialized)
5597 bfd_hash_table_free (&aout_info.includes.root);
5598 includes_hash_initialized = FALSE;
5601 /* Finish up any dynamic linking we may be doing. */
5602 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5604 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5608 /* Update the header information. */
5609 abfd->symcount = obj_aout_external_sym_count (abfd);
5610 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5611 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5612 obj_textsec (abfd)->reloc_count =
5613 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5614 obj_datasec (abfd)->reloc_count =
5615 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5617 /* Write out the string table, unless there are no symbols. */
5618 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
5620 if (abfd->symcount > 0)
5622 if (!emit_stringtab (abfd, aout_info.strtab))
5627 bfd_byte b[BYTES_IN_WORD];
5629 memset (b, 0, BYTES_IN_WORD);
5630 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
5637 if (aout_info.contents != NULL)
5638 free (aout_info.contents);
5639 if (aout_info.relocs != NULL)
5640 free (aout_info.relocs);
5641 if (aout_info.symbol_map != NULL)
5642 free (aout_info.symbol_map);
5643 if (aout_info.output_syms != NULL)
5644 free (aout_info.output_syms);
5645 if (includes_hash_initialized)
5646 bfd_hash_table_free (&aout_info.includes.root);