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);
1281 /* xgettext:c-format */
1282 (_("%s: can not represent section `%s' in a.out object file format"),
1283 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1284 bfd_set_error (bfd_error_nonrepresentable_section);
1291 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1292 || bfd_bwrite (location, count, abfd) != count)
1299 /* Read the external symbols from an a.out file. */
1302 aout_get_external_symbols (bfd *abfd)
1304 if (obj_aout_external_syms (abfd) == NULL)
1306 bfd_size_type count;
1307 struct external_nlist *syms;
1308 bfd_size_type amt = exec_hdr (abfd)->a_syms;
1310 count = amt / EXTERNAL_NLIST_SIZE;
1312 return TRUE; /* Nothing to do. */
1315 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd), amt,
1316 &obj_aout_sym_window (abfd), TRUE))
1318 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1320 /* We allocate using malloc to make the values easy to free
1321 later on. If we put them on the objalloc it might not be
1322 possible to free them. */
1323 syms = (struct external_nlist *) bfd_malloc (amt);
1327 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1328 || bfd_bread (syms, amt, abfd) != amt)
1335 obj_aout_external_syms (abfd) = syms;
1336 obj_aout_external_sym_count (abfd) = count;
1339 if (obj_aout_external_strings (abfd) == NULL
1340 && exec_hdr (abfd)->a_syms != 0)
1342 unsigned char string_chars[BYTES_IN_WORD];
1343 bfd_size_type stringsize;
1345 bfd_size_type amt = BYTES_IN_WORD;
1347 /* Get the size of the strings. */
1348 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1349 || bfd_bread ((void *) string_chars, amt, abfd) != amt)
1351 stringsize = GET_WORD (abfd, string_chars);
1354 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1355 &obj_aout_string_window (abfd), TRUE))
1357 strings = (char *) obj_aout_string_window (abfd).data;
1359 strings = (char *) bfd_malloc (stringsize + 1);
1360 if (strings == NULL)
1363 /* Skip space for the string count in the buffer for convenience
1364 when using indexes. */
1365 amt = stringsize - BYTES_IN_WORD;
1366 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1373 /* Ensure that a zero index yields an empty string. */
1376 strings[stringsize - 1] = 0;
1378 obj_aout_external_strings (abfd) = strings;
1379 obj_aout_external_string_size (abfd) = stringsize;
1385 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1386 and symbol->value fields of CACHE_PTR will be set from the a.out
1387 nlist structure. This function is responsible for setting
1388 symbol->flags and symbol->section, and adjusting symbol->value. */
1391 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1395 if ((cache_ptr->type & N_STAB) != 0
1396 || cache_ptr->type == N_FN)
1400 /* This is a debugging symbol. */
1401 cache_ptr->symbol.flags = BSF_DEBUGGING;
1403 /* Work out the symbol section. */
1404 switch (cache_ptr->type & N_TYPE)
1408 sec = obj_textsec (abfd);
1411 sec = obj_datasec (abfd);
1414 sec = obj_bsssec (abfd);
1418 sec = bfd_abs_section_ptr;
1422 cache_ptr->symbol.section = sec;
1423 cache_ptr->symbol.value -= sec->vma;
1428 /* Get the default visibility. This does not apply to all types, so
1429 we just hold it in a local variable to use if wanted. */
1430 if ((cache_ptr->type & N_EXT) == 0)
1431 visible = BSF_LOCAL;
1433 visible = BSF_GLOBAL;
1435 switch (cache_ptr->type)
1438 case N_ABS: case N_ABS | N_EXT:
1439 cache_ptr->symbol.section = bfd_abs_section_ptr;
1440 cache_ptr->symbol.flags = visible;
1443 case N_UNDF | N_EXT:
1444 if (cache_ptr->symbol.value != 0)
1446 /* This is a common symbol. */
1447 cache_ptr->symbol.flags = BSF_GLOBAL;
1448 cache_ptr->symbol.section = bfd_com_section_ptr;
1452 cache_ptr->symbol.flags = 0;
1453 cache_ptr->symbol.section = bfd_und_section_ptr;
1457 case N_TEXT: case N_TEXT | N_EXT:
1458 cache_ptr->symbol.section = obj_textsec (abfd);
1459 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1460 cache_ptr->symbol.flags = visible;
1463 /* N_SETV symbols used to represent set vectors placed in the
1464 data section. They are no longer generated. Theoretically,
1465 it was possible to extract the entries and combine them with
1466 new ones, although I don't know if that was ever actually
1467 done. Unless that feature is restored, treat them as data
1469 case N_SETV: case N_SETV | N_EXT:
1470 case N_DATA: case N_DATA | N_EXT:
1471 cache_ptr->symbol.section = obj_datasec (abfd);
1472 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1473 cache_ptr->symbol.flags = visible;
1476 case N_BSS: case N_BSS | N_EXT:
1477 cache_ptr->symbol.section = obj_bsssec (abfd);
1478 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1479 cache_ptr->symbol.flags = visible;
1482 case N_SETA: case N_SETA | N_EXT:
1483 case N_SETT: case N_SETT | N_EXT:
1484 case N_SETD: case N_SETD | N_EXT:
1485 case N_SETB: case N_SETB | N_EXT:
1487 /* This code is no longer needed. It used to be used to make
1488 the linker handle set symbols, but they are now handled in
1489 the add_symbols routine instead. */
1490 switch (cache_ptr->type & N_TYPE)
1493 cache_ptr->symbol.section = bfd_abs_section_ptr;
1496 cache_ptr->symbol.section = obj_textsec (abfd);
1499 cache_ptr->symbol.section = obj_datasec (abfd);
1502 cache_ptr->symbol.section = obj_bsssec (abfd);
1506 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1511 /* This symbol is the text of a warning message. The next
1512 symbol is the symbol to associate the warning with. If a
1513 reference is made to that symbol, a warning is issued. */
1514 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1515 cache_ptr->symbol.section = bfd_abs_section_ptr;
1518 case N_INDR: case N_INDR | N_EXT:
1519 /* An indirect symbol. This consists of two symbols in a row.
1520 The first symbol is the name of the indirection. The second
1521 symbol is the name of the target. A reference to the first
1522 symbol becomes a reference to the second. */
1523 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1524 cache_ptr->symbol.section = bfd_ind_section_ptr;
1528 cache_ptr->symbol.section = bfd_und_section_ptr;
1529 cache_ptr->symbol.flags = BSF_WEAK;
1533 cache_ptr->symbol.section = bfd_abs_section_ptr;
1534 cache_ptr->symbol.flags = BSF_WEAK;
1538 cache_ptr->symbol.section = obj_textsec (abfd);
1539 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1540 cache_ptr->symbol.flags = BSF_WEAK;
1544 cache_ptr->symbol.section = obj_datasec (abfd);
1545 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1546 cache_ptr->symbol.flags = BSF_WEAK;
1550 cache_ptr->symbol.section = obj_bsssec (abfd);
1551 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1552 cache_ptr->symbol.flags = BSF_WEAK;
1559 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1562 translate_to_native_sym_flags (bfd *abfd,
1564 struct external_nlist *sym_pointer)
1566 bfd_vma value = cache_ptr->value;
1570 /* Mask out any existing type bits in case copying from one section
1572 sym_pointer->e_type[0] &= ~N_TYPE;
1574 sec = bfd_get_section (cache_ptr);
1579 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1582 /* xgettext:c-format */
1583 (_("%s: can not represent section for symbol `%s' in a.out "
1584 "object file format"),
1585 bfd_get_filename (abfd),
1586 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1587 bfd_set_error (bfd_error_nonrepresentable_section);
1591 if (sec->output_section != NULL)
1593 off = sec->output_offset;
1594 sec = sec->output_section;
1597 if (bfd_is_abs_section (sec))
1598 sym_pointer->e_type[0] |= N_ABS;
1599 else if (sec == obj_textsec (abfd))
1600 sym_pointer->e_type[0] |= N_TEXT;
1601 else if (sec == obj_datasec (abfd))
1602 sym_pointer->e_type[0] |= N_DATA;
1603 else if (sec == obj_bsssec (abfd))
1604 sym_pointer->e_type[0] |= N_BSS;
1605 else if (bfd_is_und_section (sec))
1606 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1607 else if (bfd_is_ind_section (sec))
1608 sym_pointer->e_type[0] = N_INDR;
1609 else if (bfd_is_com_section (sec))
1610 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1613 if (aout_section_merge_with_text_p (abfd, sec))
1614 sym_pointer->e_type[0] |= N_TEXT;
1618 /* xgettext:c-format */
1619 (_("%s: can not represent section `%s' in a.out object file format"),
1620 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1621 bfd_set_error (bfd_error_nonrepresentable_section);
1626 /* Turn the symbol from section relative to absolute again. */
1627 value += sec->vma + off;
1629 if ((cache_ptr->flags & BSF_WARNING) != 0)
1630 sym_pointer->e_type[0] = N_WARNING;
1632 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1633 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1634 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1635 sym_pointer->e_type[0] |= N_EXT;
1636 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1637 sym_pointer->e_type[0] &= ~N_EXT;
1639 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1641 int type = ((aout_symbol_type *) cache_ptr)->type;
1645 case N_ABS: type = N_SETA; break;
1646 case N_TEXT: type = N_SETT; break;
1647 case N_DATA: type = N_SETD; break;
1648 case N_BSS: type = N_SETB; break;
1650 sym_pointer->e_type[0] = type;
1653 if ((cache_ptr->flags & BSF_WEAK) != 0)
1657 switch (sym_pointer->e_type[0] & N_TYPE)
1660 case N_ABS: type = N_WEAKA; break;
1661 case N_TEXT: type = N_WEAKT; break;
1662 case N_DATA: type = N_WEAKD; break;
1663 case N_BSS: type = N_WEAKB; break;
1664 case N_UNDF: type = N_WEAKU; break;
1666 sym_pointer->e_type[0] = type;
1669 PUT_WORD (abfd, value, sym_pointer->e_value);
1674 /* Native-level interface to symbols. */
1677 NAME (aout, make_empty_symbol) (bfd *abfd)
1679 bfd_size_type amt = sizeof (aout_symbol_type);
1681 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt);
1684 new_symbol->symbol.the_bfd = abfd;
1686 return &new_symbol->symbol;
1689 /* Translate a set of internal symbols into external symbols. */
1692 NAME (aout, translate_symbol_table) (bfd *abfd,
1693 aout_symbol_type *in,
1694 struct external_nlist *ext,
1695 bfd_size_type count,
1697 bfd_size_type strsize,
1698 bfd_boolean dynamic)
1700 struct external_nlist *ext_end;
1702 ext_end = ext + count;
1703 for (; ext < ext_end; ext++, in++)
1707 x = GET_WORD (abfd, ext->e_strx);
1708 in->symbol.the_bfd = abfd;
1710 /* For the normal symbols, the zero index points at the number
1711 of bytes in the string table but is to be interpreted as the
1712 null string. For the dynamic symbols, the number of bytes in
1713 the string table is stored in the __DYNAMIC structure and the
1714 zero index points at an actual string. */
1715 if (x == 0 && ! dynamic)
1716 in->symbol.name = "";
1717 else if (x < strsize)
1718 in->symbol.name = str + x;
1722 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1723 in->desc = H_GET_16 (abfd, ext->e_desc);
1724 in->other = H_GET_8 (abfd, ext->e_other);
1725 in->type = H_GET_8 (abfd, ext->e_type);
1726 in->symbol.udata.p = NULL;
1728 if (! translate_from_native_sym_flags (abfd, in))
1732 in->symbol.flags |= BSF_DYNAMIC;
1738 /* We read the symbols into a buffer, which is discarded when this
1739 function exits. We read the strings into a buffer large enough to
1740 hold them all plus all the cached symbol entries. */
1743 NAME (aout, slurp_symbol_table) (bfd *abfd)
1745 struct external_nlist *old_external_syms;
1746 aout_symbol_type *cached;
1747 bfd_size_type cached_size;
1749 /* If there's no work to be done, don't do any. */
1750 if (obj_aout_symbols (abfd) != NULL)
1753 old_external_syms = obj_aout_external_syms (abfd);
1755 if (! aout_get_external_symbols (abfd))
1758 cached_size = obj_aout_external_sym_count (abfd);
1759 if (cached_size == 0)
1760 return TRUE; /* Nothing to do. */
1762 cached_size *= sizeof (aout_symbol_type);
1763 cached = (aout_symbol_type *) bfd_zmalloc (cached_size);
1767 /* Convert from external symbol information to internal. */
1768 if (! (NAME (aout, translate_symbol_table)
1770 obj_aout_external_syms (abfd),
1771 obj_aout_external_sym_count (abfd),
1772 obj_aout_external_strings (abfd),
1773 obj_aout_external_string_size (abfd),
1780 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1782 obj_aout_symbols (abfd) = cached;
1784 /* It is very likely that anybody who calls this function will not
1785 want the external symbol information, so if it was allocated
1786 because of our call to aout_get_external_symbols, we free it up
1787 right away to save space. */
1788 if (old_external_syms == NULL
1789 && obj_aout_external_syms (abfd) != NULL)
1792 bfd_free_window (&obj_aout_sym_window (abfd));
1794 free (obj_aout_external_syms (abfd));
1796 obj_aout_external_syms (abfd) = NULL;
1802 /* We use a hash table when writing out symbols so that we only write
1803 out a particular string once. This helps particularly when the
1804 linker writes out stabs debugging entries, because each different
1805 contributing object file tends to have many duplicate stabs
1808 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1809 if BFD_TRADITIONAL_FORMAT is set. */
1811 /* Get the index of a string in a strtab, adding it if it is not
1814 static inline bfd_size_type
1815 add_to_stringtab (bfd *abfd,
1816 struct bfd_strtab_hash *tab,
1821 bfd_size_type str_index;
1823 /* An index of 0 always means the empty string. */
1824 if (str == 0 || *str == '\0')
1827 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1828 doesn't understand a hashed string table. */
1830 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1833 str_index = _bfd_stringtab_add (tab, str, hash, copy);
1835 if (str_index != (bfd_size_type) -1)
1836 /* Add BYTES_IN_WORD to the return value to account for the
1837 space taken up by the string table size. */
1838 str_index += BYTES_IN_WORD;
1843 /* Write out a strtab. ABFD is already at the right location in the
1847 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1849 bfd_byte buffer[BYTES_IN_WORD];
1850 bfd_size_type amt = BYTES_IN_WORD;
1852 /* The string table starts with the size. */
1853 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1854 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1857 return _bfd_stringtab_emit (abfd, tab);
1861 NAME (aout, write_syms) (bfd *abfd)
1863 unsigned int count ;
1864 asymbol **generic = bfd_get_outsymbols (abfd);
1865 struct bfd_strtab_hash *strtab;
1867 strtab = _bfd_stringtab_init ();
1871 for (count = 0; count < bfd_get_symcount (abfd); count++)
1873 asymbol *g = generic[count];
1875 struct external_nlist nsp;
1878 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1879 if (indx == (bfd_size_type) -1)
1881 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1883 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1885 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1886 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1887 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1891 H_PUT_16 (abfd, 0, nsp.e_desc);
1892 H_PUT_8 (abfd, 0, nsp.e_other);
1893 H_PUT_8 (abfd, 0, nsp.e_type);
1896 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1899 amt = EXTERNAL_NLIST_SIZE;
1900 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1903 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1904 here, at the end. */
1908 if (! emit_stringtab (abfd, strtab))
1911 _bfd_stringtab_free (strtab);
1916 _bfd_stringtab_free (strtab);
1921 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1923 unsigned int counter = 0;
1924 aout_symbol_type *symbase;
1926 if (!NAME (aout, slurp_symbol_table) (abfd))
1929 for (symbase = obj_aout_symbols (abfd);
1930 counter++ < bfd_get_symcount (abfd);
1932 *(location++) = (asymbol *) (symbase++);
1934 return bfd_get_symcount (abfd);
1937 /* Standard reloc stuff. */
1938 /* Output standard relocation information to a file in target byte order. */
1940 extern void NAME (aout, swap_std_reloc_out)
1941 (bfd *, arelent *, struct reloc_std_external *);
1944 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1946 struct reloc_std_external *natptr)
1949 asymbol *sym = *(g->sym_ptr_ptr);
1951 unsigned int r_length;
1953 int r_baserel, r_jmptable, r_relative;
1954 asection *output_section = sym->section->output_section;
1956 PUT_WORD (abfd, g->address, natptr->r_address);
1958 r_length = g->howto->size ; /* Size as a power of two. */
1959 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1960 /* XXX This relies on relocs coming from a.out files. */
1961 r_baserel = (g->howto->type & 8) != 0;
1962 r_jmptable = (g->howto->type & 16) != 0;
1963 r_relative = (g->howto->type & 32) != 0;
1965 /* Name was clobbered by aout_write_syms to be symbol index. */
1967 /* If this relocation is relative to a symbol then set the
1968 r_index to the symbols index, and the r_extern bit.
1970 Absolute symbols can come in in two ways, either as an offset
1971 from the abs section, or as a symbol which has an abs value.
1972 check for that here. */
1974 if (bfd_is_com_section (output_section)
1975 || bfd_is_abs_section (output_section)
1976 || bfd_is_und_section (output_section)
1977 /* PR gas/3041 a.out relocs against weak symbols
1978 must be treated as if they were against externs. */
1979 || (sym->flags & BSF_WEAK))
1981 if (bfd_abs_section_ptr->symbol == sym)
1983 /* Whoops, looked like an abs symbol, but is
1984 really an offset from the abs section. */
1990 /* Fill in symbol. */
1992 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1997 /* Just an ordinary section. */
1999 r_index = output_section->target_index;
2002 /* Now the fun stuff. */
2003 if (bfd_header_big_endian (abfd))
2005 natptr->r_index[0] = r_index >> 16;
2006 natptr->r_index[1] = r_index >> 8;
2007 natptr->r_index[2] = r_index;
2008 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
2009 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
2010 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
2011 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
2012 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
2013 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2017 natptr->r_index[2] = r_index >> 16;
2018 natptr->r_index[1] = r_index >> 8;
2019 natptr->r_index[0] = r_index;
2020 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2021 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2022 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2023 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2024 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2025 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2029 /* Extended stuff. */
2030 /* Output extended relocation information to a file in target byte order. */
2032 extern void NAME (aout, swap_ext_reloc_out)
2033 (bfd *, arelent *, struct reloc_ext_external *);
2036 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2038 struct reloc_ext_external *natptr)
2042 unsigned int r_type;
2044 asymbol *sym = *(g->sym_ptr_ptr);
2045 asection *output_section = sym->section->output_section;
2047 PUT_WORD (abfd, g->address, natptr->r_address);
2049 r_type = (unsigned int) g->howto->type;
2051 r_addend = g->addend;
2052 if ((sym->flags & BSF_SECTION_SYM) != 0)
2053 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2055 /* If this relocation is relative to a symbol then set the
2056 r_index to the symbols index, and the r_extern bit.
2058 Absolute symbols can come in in two ways, either as an offset
2059 from the abs section, or as a symbol which has an abs value.
2060 check for that here. */
2061 if (bfd_is_abs_section (bfd_get_section (sym)))
2066 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2068 if (bfd_is_und_section (bfd_get_section (sym))
2069 || (sym->flags & BSF_GLOBAL) != 0)
2073 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2077 /* Just an ordinary section. */
2079 r_index = output_section->target_index;
2082 /* Now the fun stuff. */
2083 if (bfd_header_big_endian (abfd))
2085 natptr->r_index[0] = r_index >> 16;
2086 natptr->r_index[1] = r_index >> 8;
2087 natptr->r_index[2] = r_index;
2088 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2089 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2093 natptr->r_index[2] = r_index >> 16;
2094 natptr->r_index[1] = r_index >> 8;
2095 natptr->r_index[0] = r_index;
2096 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2097 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2100 PUT_WORD (abfd, r_addend, natptr->r_addend);
2103 /* BFD deals internally with all things based from the section they're
2104 in. so, something in 10 bytes into a text section with a base of
2105 50 would have a symbol (.text+10) and know .text vma was 50.
2107 Aout keeps all it's symbols based from zero, so the symbol would
2108 contain 60. This macro subs the base of each section from the value
2109 to give the true offset from the section. */
2111 #define MOVE_ADDRESS(ad) \
2114 /* Undefined symbol. */ \
2115 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2116 cache_ptr->addend = ad; \
2120 /* Defined, section relative. Replace symbol with pointer to \
2121 symbol which points to section. */ \
2125 case N_TEXT | N_EXT: \
2126 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2127 cache_ptr->addend = ad - su->textsec->vma; \
2130 case N_DATA | N_EXT: \
2131 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2132 cache_ptr->addend = ad - su->datasec->vma; \
2135 case N_BSS | N_EXT: \
2136 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2137 cache_ptr->addend = ad - su->bsssec->vma; \
2141 case N_ABS | N_EXT: \
2142 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2143 cache_ptr->addend = ad; \
2149 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2150 struct reloc_ext_external *bytes,
2153 bfd_size_type symcount)
2155 unsigned int r_index;
2157 unsigned int r_type;
2158 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2160 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2162 /* Now the fun stuff. */
2163 if (bfd_header_big_endian (abfd))
2165 r_index = (((unsigned int) bytes->r_index[0] << 16)
2166 | ((unsigned int) bytes->r_index[1] << 8)
2167 | bytes->r_index[2]);
2168 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2169 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2170 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2174 r_index = (((unsigned int) bytes->r_index[2] << 16)
2175 | ((unsigned int) bytes->r_index[1] << 8)
2176 | bytes->r_index[0]);
2177 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2178 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2179 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2182 if (r_type < TABLE_SIZE (howto_table_ext))
2183 cache_ptr->howto = howto_table_ext + r_type;
2185 cache_ptr->howto = NULL;
2187 /* Base relative relocs are always against the symbol table,
2188 regardless of the setting of r_extern. r_extern just reflects
2189 whether the symbol the reloc is against is local or global. */
2190 if (r_type == (unsigned int) RELOC_BASE10
2191 || r_type == (unsigned int) RELOC_BASE13
2192 || r_type == (unsigned int) RELOC_BASE22)
2195 if (r_extern && r_index > symcount)
2197 /* We could arrange to return an error, but it might be useful
2198 to see the file even if it is bad. */
2203 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2207 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2208 struct reloc_std_external *bytes,
2211 bfd_size_type symcount)
2213 unsigned int r_index;
2215 unsigned int r_length;
2217 int r_baserel, r_jmptable, r_relative;
2218 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2219 unsigned int howto_idx;
2221 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2223 /* Now the fun stuff. */
2224 if (bfd_header_big_endian (abfd))
2226 r_index = (((unsigned int) bytes->r_index[0] << 16)
2227 | ((unsigned int) bytes->r_index[1] << 8)
2228 | bytes->r_index[2]);
2229 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2230 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2231 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2232 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2233 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2234 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2235 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2239 r_index = (((unsigned int) bytes->r_index[2] << 16)
2240 | ((unsigned int) bytes->r_index[1] << 8)
2241 | bytes->r_index[0]);
2242 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2243 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2244 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2245 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2246 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2247 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2248 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2251 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2252 + 16 * r_jmptable + 32 * r_relative);
2253 if (howto_idx < TABLE_SIZE (howto_table_std))
2255 cache_ptr->howto = howto_table_std + howto_idx;
2256 if (cache_ptr->howto->type == (unsigned int) -1)
2257 cache_ptr->howto = NULL;
2260 cache_ptr->howto = NULL;
2262 /* Base relative relocs are always against the symbol table,
2263 regardless of the setting of r_extern. r_extern just reflects
2264 whether the symbol the reloc is against is local or global. */
2268 if (r_extern && r_index > symcount)
2270 /* We could arrange to return an error, but it might be useful
2271 to see the file even if it is bad. */
2279 /* Read and swap the relocs for a section. */
2282 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2284 bfd_size_type count;
2285 bfd_size_type reloc_size;
2287 arelent *reloc_cache;
2289 unsigned int counter = 0;
2293 if (asect->relocation)
2296 if (asect->flags & SEC_CONSTRUCTOR)
2299 if (asect == obj_datasec (abfd))
2300 reloc_size = exec_hdr (abfd)->a_drsize;
2301 else if (asect == obj_textsec (abfd))
2302 reloc_size = exec_hdr (abfd)->a_trsize;
2303 else if (asect == obj_bsssec (abfd))
2307 bfd_set_error (bfd_error_invalid_operation);
2311 if (reloc_size == 0)
2312 return TRUE; /* Nothing to be done. */
2314 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2317 each_size = obj_reloc_entry_size (abfd);
2319 count = reloc_size / each_size;
2321 return TRUE; /* Nothing to be done. */
2323 amt = count * sizeof (arelent);
2324 reloc_cache = (arelent *) bfd_zmalloc (amt);
2325 if (reloc_cache == NULL)
2328 relocs = bfd_malloc (reloc_size);
2335 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2342 cache_ptr = reloc_cache;
2343 if (each_size == RELOC_EXT_SIZE)
2345 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2347 for (; counter < count; counter++, rptr++, cache_ptr++)
2348 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2349 (bfd_size_type) bfd_get_symcount (abfd));
2353 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2355 for (; counter < count; counter++, rptr++, cache_ptr++)
2356 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2357 (bfd_size_type) bfd_get_symcount (abfd));
2362 asect->relocation = reloc_cache;
2363 asect->reloc_count = cache_ptr - reloc_cache;
2368 /* Write out a relocation section into an object file. */
2371 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2374 unsigned char *native, *natptr;
2377 unsigned int count = section->reloc_count;
2378 bfd_size_type natsize;
2380 if (count == 0 || section->orelocation == NULL)
2383 each_size = obj_reloc_entry_size (abfd);
2384 natsize = (bfd_size_type) each_size * count;
2385 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2389 generic = section->orelocation;
2391 if (each_size == RELOC_EXT_SIZE)
2393 for (natptr = native;
2395 --count, natptr += each_size, ++generic)
2396 MY_swap_ext_reloc_out (abfd, *generic,
2397 (struct reloc_ext_external *) natptr);
2401 for (natptr = native;
2403 --count, natptr += each_size, ++generic)
2404 MY_swap_std_reloc_out (abfd, *generic,
2405 (struct reloc_std_external *) natptr);
2408 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2410 bfd_release (abfd, native);
2413 bfd_release (abfd, native);
2418 /* This is stupid. This function should be a boolean predicate. */
2421 NAME (aout, canonicalize_reloc) (bfd *abfd,
2426 arelent *tblptr = section->relocation;
2429 if (section == obj_bsssec (abfd))
2435 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2438 if (section->flags & SEC_CONSTRUCTOR)
2440 arelent_chain *chain = section->constructor_chain;
2441 for (count = 0; count < section->reloc_count; count ++)
2443 *relptr ++ = &chain->relent;
2444 chain = chain->next;
2449 tblptr = section->relocation;
2451 for (count = 0; count++ < section->reloc_count; )
2453 *relptr++ = tblptr++;
2458 return section->reloc_count;
2462 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2464 if (bfd_get_format (abfd) != bfd_object)
2466 bfd_set_error (bfd_error_invalid_operation);
2470 if (asect->flags & SEC_CONSTRUCTOR)
2471 return sizeof (arelent *) * (asect->reloc_count + 1);
2473 if (asect == obj_datasec (abfd))
2474 return sizeof (arelent *)
2475 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2478 if (asect == obj_textsec (abfd))
2479 return sizeof (arelent *)
2480 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2483 if (asect == obj_bsssec (abfd))
2484 return sizeof (arelent *);
2486 if (asect == obj_bsssec (abfd))
2489 bfd_set_error (bfd_error_invalid_operation);
2494 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2496 if (!NAME (aout, slurp_symbol_table) (abfd))
2499 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2503 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2504 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2510 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2514 bfd_symbol_info (symbol, ret);
2516 if (ret->type == '?')
2518 int type_code = aout_symbol (symbol)->type & 0xff;
2519 const char *stab_name = bfd_get_stab_name (type_code);
2520 static char buf[10];
2522 if (stab_name == NULL)
2524 sprintf (buf, "(%d)", type_code);
2528 ret->stab_type = type_code;
2529 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2530 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2531 ret->stab_name = stab_name;
2536 NAME (aout, print_symbol) (bfd *abfd,
2539 bfd_print_symbol_type how)
2541 FILE *file = (FILE *)afile;
2545 case bfd_print_symbol_name:
2547 fprintf (file,"%s", symbol->name);
2549 case bfd_print_symbol_more:
2550 fprintf (file,"%4x %2x %2x",
2551 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2552 (unsigned) (aout_symbol (symbol)->other & 0xff),
2553 (unsigned) (aout_symbol (symbol)->type));
2555 case bfd_print_symbol_all:
2557 const char *section_name = symbol->section->name;
2559 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2561 fprintf (file," %-5s %04x %02x %02x",
2563 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2564 (unsigned) (aout_symbol (symbol)->other & 0xff),
2565 (unsigned) (aout_symbol (symbol)->type & 0xff));
2567 fprintf (file," %s", symbol->name);
2573 /* If we don't have to allocate more than 1MB to hold the generic
2574 symbols, we use the generic minisymbol methord: it's faster, since
2575 it only translates the symbols once, not multiple times. */
2576 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2578 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2579 symbols. The minisymbol_to_symbol function translates these into
2580 BFD asymbol structures. */
2583 NAME (aout, read_minisymbols) (bfd *abfd,
2584 bfd_boolean dynamic,
2586 unsigned int *sizep)
2589 /* We could handle the dynamic symbols here as well, but it's
2590 easier to hand them off. */
2591 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2593 if (! aout_get_external_symbols (abfd))
2596 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2597 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2599 *minisymsp = (void *) obj_aout_external_syms (abfd);
2601 /* By passing the external symbols back from this routine, we are
2602 giving up control over the memory block. Clear
2603 obj_aout_external_syms, so that we do not try to free it
2605 obj_aout_external_syms (abfd) = NULL;
2607 *sizep = EXTERNAL_NLIST_SIZE;
2608 return obj_aout_external_sym_count (abfd);
2611 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2612 unmodified a.out symbol. The SYM argument is a structure returned
2613 by bfd_make_empty_symbol, which we fill in here. */
2616 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2617 bfd_boolean dynamic,
2618 const void * minisym,
2622 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2623 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2625 memset (sym, 0, sizeof (aout_symbol_type));
2627 /* We call translate_symbol_table to translate a single symbol. */
2628 if (! (NAME (aout, translate_symbol_table)
2630 (aout_symbol_type *) sym,
2631 (struct external_nlist *) minisym,
2633 obj_aout_external_strings (abfd),
2634 obj_aout_external_string_size (abfd),
2641 /* Provided a BFD, a section and an offset into the section, calculate
2642 and return the name of the source file and the line nearest to the
2646 NAME (aout, find_nearest_line) (bfd *abfd,
2650 const char **filename_ptr,
2651 const char **functionname_ptr,
2652 unsigned int *line_ptr,
2653 unsigned int *disriminator_ptr)
2655 /* Run down the file looking for the filename, function and linenumber. */
2657 const char *directory_name = NULL;
2658 const char *main_file_name = NULL;
2659 const char *current_file_name = NULL;
2660 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2661 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2662 bfd_vma low_line_vma = 0;
2663 bfd_vma low_func_vma = 0;
2665 bfd_size_type filelen, funclen;
2668 *filename_ptr = abfd->filename;
2669 *functionname_ptr = NULL;
2671 if (disriminator_ptr)
2672 *disriminator_ptr = 0;
2674 if (symbols != NULL)
2676 for (p = symbols; *p; p++)
2678 aout_symbol_type *q = (aout_symbol_type *) (*p);
2683 /* If this looks like a file name symbol, and it comes after
2684 the line number we have found so far, but before the
2685 offset, then we have probably not found the right line
2687 if (q->symbol.value <= offset
2688 && ((q->symbol.value > low_line_vma
2689 && (line_file_name != NULL
2691 || (q->symbol.value > low_func_vma
2694 const char *symname;
2696 symname = q->symbol.name;
2697 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2699 if (q->symbol.value > low_line_vma)
2702 line_file_name = NULL;
2704 if (q->symbol.value > low_func_vma)
2711 /* If this symbol is less than the offset, but greater than
2712 the line number we have found so far, then we have not
2713 found the right line number. */
2714 if (q->symbol.value <= offset)
2716 if (q->symbol.value > low_line_vma)
2719 line_file_name = NULL;
2721 if (q->symbol.value > low_func_vma)
2725 main_file_name = current_file_name = q->symbol.name;
2726 /* Look ahead to next symbol to check if that too is an N_SO. */
2730 q = (aout_symbol_type *) (*p);
2731 if (q->type != (int)N_SO)
2734 /* Found a second N_SO First is directory; second is filename. */
2735 directory_name = current_file_name;
2736 main_file_name = current_file_name = q->symbol.name;
2737 if (obj_textsec (abfd) != section)
2741 current_file_name = q->symbol.name;
2748 /* We'll keep this if it resolves nearer than the one we have
2750 if (q->symbol.value >= low_line_vma
2751 && q->symbol.value <= offset)
2753 *line_ptr = q->desc;
2754 low_line_vma = q->symbol.value;
2755 line_file_name = current_file_name;
2756 line_directory_name = directory_name;
2761 /* We'll keep this if it is nearer than the one we have already. */
2762 if (q->symbol.value >= low_func_vma &&
2763 q->symbol.value <= offset)
2765 low_func_vma = q->symbol.value;
2766 func = (asymbol *)q;
2768 else if (q->symbol.value > offset)
2779 main_file_name = line_file_name;
2780 directory_name = line_directory_name;
2783 if (main_file_name == NULL
2784 || IS_ABSOLUTE_PATH (main_file_name)
2785 || directory_name == NULL)
2788 filelen = strlen (directory_name) + strlen (main_file_name);
2793 funclen = strlen (bfd_asymbol_name (func));
2795 if (adata (abfd).line_buf != NULL)
2796 free (adata (abfd).line_buf);
2798 if (filelen + funclen == 0)
2799 adata (abfd).line_buf = buf = NULL;
2802 buf = (char *) bfd_malloc (filelen + funclen + 3);
2803 adata (abfd).line_buf = buf;
2808 if (main_file_name != NULL)
2810 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2811 *filename_ptr = main_file_name;
2815 /* PR binutils/20891: In a corrupt input file both
2816 main_file_name and directory_name can be empty... */
2817 * filename_ptr = NULL;
2820 snprintf (buf, filelen + 1, "%s%s", directory_name,
2822 *filename_ptr = buf;
2830 const char *function = func->name;
2835 /* PR binutils/20892: In a corrupt input file func can be empty. */
2836 * functionname_ptr = NULL;
2839 /* The caller expects a symbol name. We actually have a
2840 function name, without the leading underscore. Put the
2841 underscore back in, so that the caller gets a symbol name. */
2842 if (bfd_get_symbol_leading_char (abfd) == '\0')
2843 strcpy (buf, function);
2846 buf[0] = bfd_get_symbol_leading_char (abfd);
2847 strcpy (buf + 1, function);
2849 /* Have to remove : stuff. */
2850 colon = strchr (buf, ':');
2853 *functionname_ptr = buf;
2860 NAME (aout, sizeof_headers) (bfd *abfd,
2861 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2863 return adata (abfd).exec_bytes_size;
2866 /* Free all information we have cached for this BFD. We can always
2867 read it again later if we need it. */
2870 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2874 if (bfd_get_format (abfd) != bfd_object
2875 || abfd->tdata.aout_data == NULL)
2878 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2879 BFCI_FREE (obj_aout_symbols (abfd));
2881 obj_aout_external_syms (abfd) = 0;
2882 bfd_free_window (&obj_aout_sym_window (abfd));
2883 bfd_free_window (&obj_aout_string_window (abfd));
2884 obj_aout_external_strings (abfd) = 0;
2886 BFCI_FREE (obj_aout_external_syms (abfd));
2887 BFCI_FREE (obj_aout_external_strings (abfd));
2889 for (o = abfd->sections; o != NULL; o = o->next)
2890 BFCI_FREE (o->relocation);
2896 /* a.out link code. */
2898 /* Routine to create an entry in an a.out link hash table. */
2900 struct bfd_hash_entry *
2901 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2902 struct bfd_hash_table *table,
2905 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2907 /* Allocate the structure if it has not already been allocated by a
2910 ret = (struct aout_link_hash_entry *) bfd_hash_allocate (table,
2915 /* Call the allocation method of the superclass. */
2916 ret = ((struct aout_link_hash_entry *)
2917 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2921 /* Set local fields. */
2922 ret->written = FALSE;
2926 return (struct bfd_hash_entry *) ret;
2929 /* Initialize an a.out link hash table. */
2932 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2934 struct bfd_hash_entry *(*newfunc)
2935 (struct bfd_hash_entry *, struct bfd_hash_table *,
2937 unsigned int entsize)
2939 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2942 /* Create an a.out link hash table. */
2944 struct bfd_link_hash_table *
2945 NAME (aout, link_hash_table_create) (bfd *abfd)
2947 struct aout_link_hash_table *ret;
2948 bfd_size_type amt = sizeof (* ret);
2950 ret = (struct aout_link_hash_table *) bfd_malloc (amt);
2954 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2955 NAME (aout, link_hash_newfunc),
2956 sizeof (struct aout_link_hash_entry)))
2964 /* Add all symbols from an object file to the hash table. */
2967 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2969 bfd_boolean (*add_one_symbol)
2970 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2971 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2972 struct bfd_link_hash_entry **);
2973 struct external_nlist *syms;
2974 bfd_size_type sym_count;
2977 struct aout_link_hash_entry **sym_hash;
2978 struct external_nlist *p;
2979 struct external_nlist *pend;
2982 syms = obj_aout_external_syms (abfd);
2983 sym_count = obj_aout_external_sym_count (abfd);
2984 strings = obj_aout_external_strings (abfd);
2985 if (info->keep_memory)
2990 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2992 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2993 (abfd, info, &syms, &sym_count, &strings)))
2998 return TRUE; /* Nothing to do. */
3000 /* We keep a list of the linker hash table entries that correspond
3001 to particular symbols. We could just look them up in the hash
3002 table, but keeping the list is more efficient. Perhaps this
3003 should be conditional on info->keep_memory. */
3004 amt = sym_count * sizeof (struct aout_link_hash_entry *);
3005 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt);
3006 if (sym_hash == NULL)
3008 obj_aout_sym_hashes (abfd) = sym_hash;
3010 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3011 if (add_one_symbol == NULL)
3012 add_one_symbol = _bfd_generic_link_add_one_symbol;
3015 pend = p + sym_count;
3016 for (; p < pend; p++, sym_hash++)
3027 type = H_GET_8 (abfd, p->e_type);
3029 /* Ignore debugging symbols. */
3030 if ((type & N_STAB) != 0)
3033 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3034 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd))
3036 name = strings + GET_WORD (abfd, p->e_strx);
3037 value = GET_WORD (abfd, p->e_value);
3054 /* Ignore symbols that are not externally visible. */
3057 /* Ignore local indirect symbol. */
3062 case N_UNDF | N_EXT:
3065 section = bfd_und_section_ptr;
3069 section = bfd_com_section_ptr;
3072 section = bfd_abs_section_ptr;
3074 case N_TEXT | N_EXT:
3075 section = obj_textsec (abfd);
3076 value -= bfd_get_section_vma (abfd, section);
3078 case N_DATA | N_EXT:
3079 case N_SETV | N_EXT:
3080 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3081 translate_from_native_sym_flags. */
3082 section = obj_datasec (abfd);
3083 value -= bfd_get_section_vma (abfd, section);
3086 section = obj_bsssec (abfd);
3087 value -= bfd_get_section_vma (abfd, section);
3089 case N_INDR | N_EXT:
3090 /* An indirect symbol. The next symbol is the symbol
3091 which this one really is. */
3092 /* See PR 20925 for a reproducer. */
3096 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3097 if (GET_WORD (abfd, p->e_strx) > obj_aout_external_string_size (abfd))
3099 string = strings + GET_WORD (abfd, p->e_strx);
3100 section = bfd_ind_section_ptr;
3101 flags |= BSF_INDIRECT;
3103 case N_COMM | N_EXT:
3104 section = bfd_com_section_ptr;
3106 case N_SETA: case N_SETA | N_EXT:
3107 section = bfd_abs_section_ptr;
3108 flags |= BSF_CONSTRUCTOR;
3110 case N_SETT: case N_SETT | N_EXT:
3111 section = obj_textsec (abfd);
3112 flags |= BSF_CONSTRUCTOR;
3113 value -= bfd_get_section_vma (abfd, section);
3115 case N_SETD: case N_SETD | N_EXT:
3116 section = obj_datasec (abfd);
3117 flags |= BSF_CONSTRUCTOR;
3118 value -= bfd_get_section_vma (abfd, section);
3120 case N_SETB: case N_SETB | N_EXT:
3121 section = obj_bsssec (abfd);
3122 flags |= BSF_CONSTRUCTOR;
3123 value -= bfd_get_section_vma (abfd, section);
3126 /* A warning symbol. The next symbol is the one to warn
3127 about. If there is no next symbol, just look away. */
3132 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3133 if (GET_WORD (abfd, p->e_strx) > obj_aout_external_string_size (abfd))
3135 name = strings + GET_WORD (abfd, p->e_strx);
3136 section = bfd_und_section_ptr;
3137 flags |= BSF_WARNING;
3140 section = bfd_und_section_ptr;
3144 section = bfd_abs_section_ptr;
3148 section = obj_textsec (abfd);
3149 value -= bfd_get_section_vma (abfd, section);
3153 section = obj_datasec (abfd);
3154 value -= bfd_get_section_vma (abfd, section);
3158 section = obj_bsssec (abfd);
3159 value -= bfd_get_section_vma (abfd, section);
3164 if (! ((*add_one_symbol)
3165 (info, abfd, name, flags, section, value, string, copy, FALSE,
3166 (struct bfd_link_hash_entry **) sym_hash)))
3169 /* Restrict the maximum alignment of a common symbol based on
3170 the architecture, since a.out has no way to represent
3171 alignment requirements of a section in a .o file. FIXME:
3172 This isn't quite right: it should use the architecture of the
3173 output file, not the input files. */
3174 if ((*sym_hash)->root.type == bfd_link_hash_common
3175 && ((*sym_hash)->root.u.c.p->alignment_power >
3176 bfd_get_arch_info (abfd)->section_align_power))
3177 (*sym_hash)->root.u.c.p->alignment_power =
3178 bfd_get_arch_info (abfd)->section_align_power;
3180 /* If this is a set symbol, and we are not building sets, then
3181 it is possible for the hash entry to not have been set. In
3182 such a case, treat the symbol as not globally defined. */
3183 if ((*sym_hash)->root.type == bfd_link_hash_new)
3185 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3189 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3196 /* Free up the internal symbols read from an a.out file. */
3199 aout_link_free_symbols (bfd *abfd)
3201 if (obj_aout_external_syms (abfd) != NULL)
3204 bfd_free_window (&obj_aout_sym_window (abfd));
3206 free ((void *) obj_aout_external_syms (abfd));
3208 obj_aout_external_syms (abfd) = NULL;
3210 if (obj_aout_external_strings (abfd) != NULL)
3213 bfd_free_window (&obj_aout_string_window (abfd));
3215 free ((void *) obj_aout_external_strings (abfd));
3217 obj_aout_external_strings (abfd) = NULL;
3222 /* Add symbols from an a.out object file. */
3225 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3227 if (! aout_get_external_symbols (abfd))
3229 if (! aout_link_add_symbols (abfd, info))
3231 if (! info->keep_memory)
3233 if (! aout_link_free_symbols (abfd))
3239 /* Look through the internal symbols to see if this object file should
3240 be included in the link. We should include this object file if it
3241 defines any symbols which are currently undefined. If this object
3242 file defines a common symbol, then we may adjust the size of the
3243 known symbol but we do not include the object file in the link
3244 (unless there is some other reason to include it). */
3247 aout_link_check_ar_symbols (bfd *abfd,
3248 struct bfd_link_info *info,
3249 bfd_boolean *pneeded,
3252 struct external_nlist *p;
3253 struct external_nlist *pend;
3258 /* Look through all the symbols. */
3259 p = obj_aout_external_syms (abfd);
3260 pend = p + obj_aout_external_sym_count (abfd);
3261 strings = obj_aout_external_strings (abfd);
3262 for (; p < pend; p++)
3264 int type = H_GET_8 (abfd, p->e_type);
3266 struct bfd_link_hash_entry *h;
3268 /* Ignore symbols that are not externally visible. This is an
3269 optimization only, as we check the type more thoroughly
3271 if (((type & N_EXT) == 0
3272 || (type & N_STAB) != 0
3279 if (type == N_WARNING
3285 name = strings + GET_WORD (abfd, p->e_strx);
3286 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3288 /* We are only interested in symbols that are currently
3289 undefined or common. */
3291 || (h->type != bfd_link_hash_undefined
3292 && h->type != bfd_link_hash_common))
3294 if (type == (N_INDR | N_EXT))
3299 if (type == (N_TEXT | N_EXT)
3300 || type == (N_DATA | N_EXT)
3301 || type == (N_BSS | N_EXT)
3302 || type == (N_ABS | N_EXT)
3303 || type == (N_INDR | N_EXT))
3305 /* This object file defines this symbol. We must link it
3306 in. This is true regardless of whether the current
3307 definition of the symbol is undefined or common.
3309 If the current definition is common, we have a case in
3310 which we have already seen an object file including:
3312 and this object file from the archive includes:
3314 In such a case, whether to include this object is target
3315 dependant for backward compatibility.
3317 FIXME: The SunOS 4.1.3 linker will pull in the archive
3318 element if the symbol is defined in the .data section,
3319 but not if it is defined in the .text section. That
3320 seems a bit crazy to me, and it has not been implemented
3321 yet. However, it might be correct. */
3322 if (h->type == bfd_link_hash_common)
3326 switch (info->common_skip_ar_symbols)
3328 case bfd_link_common_skip_text:
3329 skip = (type == (N_TEXT | N_EXT));
3331 case bfd_link_common_skip_data:
3332 skip = (type == (N_DATA | N_EXT));
3335 case bfd_link_common_skip_all:
3344 if (!(*info->callbacks
3345 ->add_archive_element) (info, abfd, name, subsbfd))
3351 if (type == (N_UNDF | N_EXT))
3355 value = GET_WORD (abfd, p->e_value);
3358 /* This symbol is common in the object from the archive
3360 if (h->type == bfd_link_hash_undefined)
3365 symbfd = h->u.undef.abfd;
3368 /* This symbol was created as undefined from
3369 outside BFD. We assume that we should link
3370 in the object file. This is done for the -u
3371 option in the linker. */
3372 if (!(*info->callbacks
3373 ->add_archive_element) (info, abfd, name, subsbfd))
3378 /* Turn the current link symbol into a common
3379 symbol. It is already on the undefs list. */
3380 h->type = bfd_link_hash_common;
3381 h->u.c.p = (struct bfd_link_hash_common_entry *)
3382 bfd_hash_allocate (&info->hash->table,
3383 sizeof (struct bfd_link_hash_common_entry));
3384 if (h->u.c.p == NULL)
3387 h->u.c.size = value;
3389 /* FIXME: This isn't quite right. The maximum
3390 alignment of a common symbol should be set by the
3391 architecture of the output file, not of the input
3393 power = bfd_log2 (value);
3394 if (power > bfd_get_arch_info (abfd)->section_align_power)
3395 power = bfd_get_arch_info (abfd)->section_align_power;
3396 h->u.c.p->alignment_power = power;
3398 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3403 /* Adjust the size of the common symbol if
3405 if (value > h->u.c.size)
3406 h->u.c.size = value;
3416 /* This symbol is weak but defined. We must pull it in if
3417 the current link symbol is undefined, but we don't want
3418 it if the current link symbol is common. */
3419 if (h->type == bfd_link_hash_undefined)
3421 if (!(*info->callbacks
3422 ->add_archive_element) (info, abfd, name, subsbfd))
3430 /* We do not need this object file. */
3433 /* Check a single archive element to see if we need to include it in
3434 the link. *PNEEDED is set according to whether this element is
3435 needed in the link or not. This is called from
3436 _bfd_generic_link_add_archive_symbols. */
3439 aout_link_check_archive_element (bfd *abfd,
3440 struct bfd_link_info *info,
3441 struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED,
3442 const char *name ATTRIBUTE_UNUSED,
3443 bfd_boolean *pneeded)
3448 if (!aout_get_external_symbols (abfd))
3452 if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd))
3458 /* Potentially, the add_archive_element hook may have set a
3459 substitute BFD for us. */
3462 if (!info->keep_memory
3463 && !aout_link_free_symbols (oldbfd))
3465 if (!aout_get_external_symbols (abfd))
3468 if (!aout_link_add_symbols (abfd, info))
3472 if (!info->keep_memory || !needed)
3474 if (!aout_link_free_symbols (abfd))
3481 /* Given an a.out BFD, add symbols to the global hash table as
3485 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3487 switch (bfd_get_format (abfd))
3490 return aout_link_add_object_symbols (abfd, info);
3492 return _bfd_generic_link_add_archive_symbols
3493 (abfd, info, aout_link_check_archive_element);
3495 bfd_set_error (bfd_error_wrong_format);
3500 /* A hash table used for header files with N_BINCL entries. */
3502 struct aout_link_includes_table
3504 struct bfd_hash_table root;
3507 /* A linked list of totals that we have found for a particular header
3510 struct aout_link_includes_totals
3512 struct aout_link_includes_totals *next;
3516 /* An entry in the header file hash table. */
3518 struct aout_link_includes_entry
3520 struct bfd_hash_entry root;
3521 /* List of totals we have found for this file. */
3522 struct aout_link_includes_totals *totals;
3525 /* Look up an entry in an the header file hash table. */
3527 #define aout_link_includes_lookup(table, string, create, copy) \
3528 ((struct aout_link_includes_entry *) \
3529 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3531 /* During the final link step we need to pass around a bunch of
3532 information, so we do it in an instance of this structure. */
3534 struct aout_final_link_info
3536 /* General link information. */
3537 struct bfd_link_info *info;
3540 /* Reloc file positions. */
3541 file_ptr treloff, dreloff;
3542 /* File position of symbols. */
3545 struct bfd_strtab_hash *strtab;
3546 /* Header file hash table. */
3547 struct aout_link_includes_table includes;
3548 /* A buffer large enough to hold the contents of any section. */
3550 /* A buffer large enough to hold the relocs of any section. */
3552 /* A buffer large enough to hold the symbol map of any input BFD. */
3554 /* A buffer large enough to hold output symbols of any input BFD. */
3555 struct external_nlist *output_syms;
3558 /* The function to create a new entry in the header file hash table. */
3560 static struct bfd_hash_entry *
3561 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3562 struct bfd_hash_table *table,
3565 struct aout_link_includes_entry *ret =
3566 (struct aout_link_includes_entry *) entry;
3568 /* Allocate the structure if it has not already been allocated by a
3571 ret = (struct aout_link_includes_entry *)
3572 bfd_hash_allocate (table, sizeof (* ret));
3576 /* Call the allocation method of the superclass. */
3577 ret = ((struct aout_link_includes_entry *)
3578 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3581 /* Set local fields. */
3585 return (struct bfd_hash_entry *) ret;
3588 /* Write out a symbol that was not associated with an a.out input
3592 aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data)
3594 struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh;
3595 struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data;
3599 struct external_nlist outsym;
3603 if (h->root.type == bfd_link_hash_warning)
3605 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3606 if (h->root.type == bfd_link_hash_new)
3610 output_bfd = flaginfo->output_bfd;
3612 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3614 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3615 (output_bfd, flaginfo->info, h)))
3617 /* FIXME: No way to handle errors. */
3627 /* An indx of -2 means the symbol must be written. */
3629 && (flaginfo->info->strip == strip_all
3630 || (flaginfo->info->strip == strip_some
3631 && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string,
3632 FALSE, FALSE) == NULL)))
3635 switch (h->root.type)
3638 case bfd_link_hash_warning:
3640 /* Avoid variable not initialized warnings. */
3642 case bfd_link_hash_new:
3643 /* This can happen for set symbols when sets are not being
3646 case bfd_link_hash_undefined:
3647 type = N_UNDF | N_EXT;
3650 case bfd_link_hash_defined:
3651 case bfd_link_hash_defweak:
3655 sec = h->root.u.def.section->output_section;
3656 BFD_ASSERT (bfd_is_abs_section (sec)
3657 || sec->owner == output_bfd);
3658 if (sec == obj_textsec (output_bfd))
3659 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3660 else if (sec == obj_datasec (output_bfd))
3661 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3662 else if (sec == obj_bsssec (output_bfd))
3663 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3665 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3667 val = (h->root.u.def.value
3669 + h->root.u.def.section->output_offset);
3672 case bfd_link_hash_common:
3673 type = N_UNDF | N_EXT;
3674 val = h->root.u.c.size;
3676 case bfd_link_hash_undefweak:
3680 case bfd_link_hash_indirect:
3681 /* We ignore these symbols, since the indirected symbol is
3682 already in the hash table. */
3686 H_PUT_8 (output_bfd, type, outsym.e_type);
3687 H_PUT_8 (output_bfd, 0, outsym.e_other);
3688 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3689 indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string,
3691 if (indx == - (bfd_size_type) 1)
3692 /* FIXME: No way to handle errors. */
3695 PUT_WORD (output_bfd, indx, outsym.e_strx);
3696 PUT_WORD (output_bfd, val, outsym.e_value);
3698 amt = EXTERNAL_NLIST_SIZE;
3699 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0
3700 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3701 /* FIXME: No way to handle errors. */
3704 flaginfo->symoff += EXTERNAL_NLIST_SIZE;
3705 h->indx = obj_aout_external_sym_count (output_bfd);
3706 ++obj_aout_external_sym_count (output_bfd);
3711 /* Handle a link order which is supposed to generate a reloc. */
3714 aout_link_reloc_link_order (struct aout_final_link_info *flaginfo,
3716 struct bfd_link_order *p)
3718 struct bfd_link_order_reloc *pr;
3721 reloc_howto_type *howto;
3722 file_ptr *reloff_ptr = NULL;
3723 struct reloc_std_external srel;
3724 struct reloc_ext_external erel;
3730 if (p->type == bfd_section_reloc_link_order)
3733 if (bfd_is_abs_section (pr->u.section))
3734 r_index = N_ABS | N_EXT;
3737 BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd);
3738 r_index = pr->u.section->target_index;
3743 struct aout_link_hash_entry *h;
3745 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3747 h = ((struct aout_link_hash_entry *)
3748 bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info,
3749 pr->u.name, FALSE, FALSE, TRUE));
3755 /* We decided to strip this symbol, but it turns out that we
3756 can't. Note that we lose the other and desc information
3757 here. I don't think that will ever matter for a global
3761 if (!aout_link_write_other_symbol (&h->root.root, flaginfo))
3767 (*flaginfo->info->callbacks->unattached_reloc)
3768 (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0);
3773 howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc);
3776 bfd_set_error (bfd_error_bad_value);
3780 if (o == obj_textsec (flaginfo->output_bfd))
3781 reloff_ptr = &flaginfo->treloff;
3782 else if (o == obj_datasec (flaginfo->output_bfd))
3783 reloff_ptr = &flaginfo->dreloff;
3787 if (obj_reloc_entry_size (flaginfo->output_bfd) == RELOC_STD_SIZE)
3790 MY_put_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, howto,
3800 r_pcrel = (int) howto->pc_relative;
3801 r_baserel = (howto->type & 8) != 0;
3802 r_jmptable = (howto->type & 16) != 0;
3803 r_relative = (howto->type & 32) != 0;
3804 r_length = howto->size;
3806 PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address);
3807 if (bfd_header_big_endian (flaginfo->output_bfd))
3809 srel.r_index[0] = r_index >> 16;
3810 srel.r_index[1] = r_index >> 8;
3811 srel.r_index[2] = r_index;
3813 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3814 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3815 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3816 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3817 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3818 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3822 srel.r_index[2] = r_index >> 16;
3823 srel.r_index[1] = r_index >> 8;
3824 srel.r_index[0] = r_index;
3826 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3827 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3828 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3829 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3830 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3831 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3835 rel_ptr = (void *) &srel;
3837 /* We have to write the addend into the object file, since
3838 standard a.out relocs are in place. It would be more
3839 reliable if we had the current contents of the file here,
3840 rather than assuming zeroes, but we can't read the file since
3841 it was opened using bfd_openw. */
3842 if (pr->addend != 0)
3845 bfd_reloc_status_type r;
3849 size = bfd_get_reloc_size (howto);
3850 buf = (bfd_byte *) bfd_zmalloc (size);
3851 if (buf == NULL && size != 0)
3853 r = MY_relocate_contents (howto, flaginfo->output_bfd,
3854 (bfd_vma) pr->addend, buf);
3860 case bfd_reloc_outofrange:
3862 case bfd_reloc_overflow:
3863 (*flaginfo->info->callbacks->reloc_overflow)
3864 (flaginfo->info, NULL,
3865 (p->type == bfd_section_reloc_link_order
3866 ? bfd_section_name (flaginfo->output_bfd,
3869 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0);
3872 ok = bfd_set_section_contents (flaginfo->output_bfd, o, (void *) buf,
3873 (file_ptr) p->offset, size);
3881 #ifdef MY_put_ext_reloc
3882 MY_put_ext_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset,
3883 howto, &erel, pr->addend);
3885 PUT_WORD (flaginfo->output_bfd, p->offset, erel.r_address);
3887 if (bfd_header_big_endian (flaginfo->output_bfd))
3889 erel.r_index[0] = r_index >> 16;
3890 erel.r_index[1] = r_index >> 8;
3891 erel.r_index[2] = r_index;
3893 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3894 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3898 erel.r_index[2] = r_index >> 16;
3899 erel.r_index[1] = r_index >> 8;
3900 erel.r_index[0] = r_index;
3902 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3903 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3906 PUT_WORD (flaginfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3907 #endif /* MY_put_ext_reloc */
3909 rel_ptr = (void *) &erel;
3912 amt = obj_reloc_entry_size (flaginfo->output_bfd);
3913 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3914 || bfd_bwrite (rel_ptr, amt, flaginfo->output_bfd) != amt)
3917 *reloff_ptr += obj_reloc_entry_size (flaginfo->output_bfd);
3919 /* Assert that the relocs have not run into the symbols, and that n
3920 the text relocs have not run into the data relocs. */
3921 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
3922 && (reloff_ptr != &flaginfo->treloff
3924 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
3929 /* Get the section corresponding to a reloc index. */
3931 static INLINE asection *
3932 aout_reloc_index_to_section (bfd *abfd, int indx)
3934 switch (indx & N_TYPE)
3936 case N_TEXT: return obj_textsec (abfd);
3937 case N_DATA: return obj_datasec (abfd);
3938 case N_BSS: return obj_bsssec (abfd);
3940 case N_UNDF: return bfd_abs_section_ptr;
3946 /* Relocate an a.out section using standard a.out relocs. */
3949 aout_link_input_section_std (struct aout_final_link_info *flaginfo,
3951 asection *input_section,
3952 struct reloc_std_external *relocs,
3953 bfd_size_type rel_size,
3956 bfd_boolean (*check_dynamic_reloc)
3957 (struct bfd_link_info *, bfd *, asection *,
3958 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3961 bfd_boolean relocatable;
3962 struct external_nlist *syms;
3964 struct aout_link_hash_entry **sym_hashes;
3966 bfd_size_type reloc_count;
3967 struct reloc_std_external *rel;
3968 struct reloc_std_external *rel_end;
3970 output_bfd = flaginfo->output_bfd;
3971 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3973 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3974 BFD_ASSERT (input_bfd->xvec->header_byteorder
3975 == output_bfd->xvec->header_byteorder);
3977 relocatable = bfd_link_relocatable (flaginfo->info);
3978 syms = obj_aout_external_syms (input_bfd);
3979 strings = obj_aout_external_strings (input_bfd);
3980 sym_hashes = obj_aout_sym_hashes (input_bfd);
3981 symbol_map = flaginfo->symbol_map;
3983 reloc_count = rel_size / RELOC_STD_SIZE;
3985 rel_end = rel + reloc_count;
3986 for (; rel < rel_end; rel++)
3993 reloc_howto_type *howto;
3994 struct aout_link_hash_entry *h = NULL;
3996 bfd_reloc_status_type r;
3998 r_addr = GET_SWORD (input_bfd, rel->r_address);
4000 #ifdef MY_reloc_howto
4001 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
4007 unsigned int howto_idx;
4009 if (bfd_header_big_endian (input_bfd))
4011 r_index = (((unsigned int) rel->r_index[0] << 16)
4012 | ((unsigned int) rel->r_index[1] << 8)
4014 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4015 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4016 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4017 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4018 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4019 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4020 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4024 r_index = (((unsigned int) rel->r_index[2] << 16)
4025 | ((unsigned int) rel->r_index[1] << 8)
4027 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4028 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4029 r_baserel = (0 != (rel->r_type[0]
4030 & RELOC_STD_BITS_BASEREL_LITTLE));
4031 r_jmptable= (0 != (rel->r_type[0]
4032 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4033 r_relative= (0 != (rel->r_type[0]
4034 & RELOC_STD_BITS_RELATIVE_LITTLE));
4035 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4036 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4039 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4040 + 16 * r_jmptable + 32 * r_relative);
4041 if (howto_idx < TABLE_SIZE (howto_table_std))
4042 howto = howto_table_std + howto_idx;
4050 (*flaginfo->info->callbacks->einfo)
4051 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4052 bfd_set_error (bfd_error_bad_value);
4058 /* We are generating a relocatable output file, and must
4059 modify the reloc accordingly. */
4062 /* If we know the symbol this relocation is against,
4063 convert it into a relocation against a section. This
4064 is what the native linker does. */
4065 h = sym_hashes[r_index];
4067 && (h->root.type == bfd_link_hash_defined
4068 || h->root.type == bfd_link_hash_defweak))
4070 asection *output_section;
4072 /* Change the r_extern value. */
4073 if (bfd_header_big_endian (output_bfd))
4074 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4076 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4078 /* Compute a new r_index. */
4079 output_section = h->root.u.def.section->output_section;
4080 if (output_section == obj_textsec (output_bfd))
4082 else if (output_section == obj_datasec (output_bfd))
4084 else if (output_section == obj_bsssec (output_bfd))
4089 /* Add the symbol value and the section VMA to the
4090 addend stored in the contents. */
4091 relocation = (h->root.u.def.value
4092 + output_section->vma
4093 + h->root.u.def.section->output_offset);
4097 /* We must change r_index according to the symbol
4099 r_index = symbol_map[r_index];
4105 /* We decided to strip this symbol, but it
4106 turns out that we can't. Note that we
4107 lose the other and desc information here.
4108 I don't think that will ever matter for a
4114 if (!aout_link_write_other_symbol (&h->root.root,
4124 name = strings + GET_WORD (input_bfd,
4125 syms[r_index].e_strx);
4126 (*flaginfo->info->callbacks->unattached_reloc)
4127 (flaginfo->info, name,
4128 input_bfd, input_section, r_addr);
4136 /* Write out the new r_index value. */
4137 if (bfd_header_big_endian (output_bfd))
4139 rel->r_index[0] = r_index >> 16;
4140 rel->r_index[1] = r_index >> 8;
4141 rel->r_index[2] = r_index;
4145 rel->r_index[2] = r_index >> 16;
4146 rel->r_index[1] = r_index >> 8;
4147 rel->r_index[0] = r_index;
4154 /* This is a relocation against a section. We must
4155 adjust by the amount that the section moved. */
4156 section = aout_reloc_index_to_section (input_bfd, r_index);
4157 relocation = (section->output_section->vma
4158 + section->output_offset
4162 /* Change the address of the relocation. */
4163 PUT_WORD (output_bfd,
4164 r_addr + input_section->output_offset,
4167 /* Adjust a PC relative relocation by removing the reference
4168 to the original address in the section and including the
4169 reference to the new address. */
4171 relocation -= (input_section->output_section->vma
4172 + input_section->output_offset
4173 - input_section->vma);
4175 #ifdef MY_relocatable_reloc
4176 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4179 if (relocation == 0)
4182 r = MY_relocate_contents (howto,
4183 input_bfd, relocation,
4190 /* We are generating an executable, and must do a full
4196 h = sym_hashes[r_index];
4199 && (h->root.type == bfd_link_hash_defined
4200 || h->root.type == bfd_link_hash_defweak))
4202 relocation = (h->root.u.def.value
4203 + h->root.u.def.section->output_section->vma
4204 + h->root.u.def.section->output_offset);
4207 && h->root.type == bfd_link_hash_undefweak)
4219 section = aout_reloc_index_to_section (input_bfd, r_index);
4220 relocation = (section->output_section->vma
4221 + section->output_offset
4224 relocation += input_section->vma;
4227 if (check_dynamic_reloc != NULL)
4231 if (! ((*check_dynamic_reloc)
4232 (flaginfo->info, input_bfd, input_section, h,
4233 (void *) rel, contents, &skip, &relocation)))
4239 /* Now warn if a global symbol is undefined. We could not
4240 do this earlier, because check_dynamic_reloc might want
4241 to skip this reloc. */
4242 if (hundef && ! bfd_link_pic (flaginfo->info) && ! r_baserel)
4247 name = h->root.root.string;
4249 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4250 (*flaginfo->info->callbacks->undefined_symbol)
4251 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE);
4254 r = MY_final_link_relocate (howto,
4255 input_bfd, input_section,
4256 contents, r_addr, relocation,
4260 if (r != bfd_reloc_ok)
4265 case bfd_reloc_outofrange:
4267 case bfd_reloc_overflow:
4274 name = strings + GET_WORD (input_bfd,
4275 syms[r_index].e_strx);
4280 s = aout_reloc_index_to_section (input_bfd, r_index);
4281 name = bfd_section_name (input_bfd, s);
4283 (*flaginfo->info->callbacks->reloc_overflow)
4284 (flaginfo->info, (h ? &h->root : NULL), name, howto->name,
4285 (bfd_vma) 0, input_bfd, input_section, r_addr);
4295 /* Relocate an a.out section using extended a.out relocs. */
4298 aout_link_input_section_ext (struct aout_final_link_info *flaginfo,
4300 asection *input_section,
4301 struct reloc_ext_external *relocs,
4302 bfd_size_type rel_size,
4305 bfd_boolean (*check_dynamic_reloc)
4306 (struct bfd_link_info *, bfd *, asection *,
4307 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4310 bfd_boolean relocatable;
4311 struct external_nlist *syms;
4313 struct aout_link_hash_entry **sym_hashes;
4315 bfd_size_type reloc_count;
4316 struct reloc_ext_external *rel;
4317 struct reloc_ext_external *rel_end;
4319 output_bfd = flaginfo->output_bfd;
4320 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4322 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4323 BFD_ASSERT (input_bfd->xvec->header_byteorder
4324 == output_bfd->xvec->header_byteorder);
4326 relocatable = bfd_link_relocatable (flaginfo->info);
4327 syms = obj_aout_external_syms (input_bfd);
4328 strings = obj_aout_external_strings (input_bfd);
4329 sym_hashes = obj_aout_sym_hashes (input_bfd);
4330 symbol_map = flaginfo->symbol_map;
4332 reloc_count = rel_size / RELOC_EXT_SIZE;
4334 rel_end = rel + reloc_count;
4335 for (; rel < rel_end; rel++)
4340 unsigned int r_type;
4342 struct aout_link_hash_entry *h = NULL;
4343 asection *r_section = NULL;
4346 r_addr = GET_SWORD (input_bfd, rel->r_address);
4348 if (bfd_header_big_endian (input_bfd))
4350 r_index = (((unsigned int) rel->r_index[0] << 16)
4351 | ((unsigned int) rel->r_index[1] << 8)
4353 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4354 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4355 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4359 r_index = (((unsigned int) rel->r_index[2] << 16)
4360 | ((unsigned int) rel->r_index[1] << 8)
4362 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4363 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4364 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4367 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4369 if (r_type >= TABLE_SIZE (howto_table_ext))
4371 (*flaginfo->info->callbacks->einfo)
4372 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4373 bfd_set_error (bfd_error_bad_value);
4379 /* We are generating a relocatable output file, and must
4380 modify the reloc accordingly. */
4382 || r_type == (unsigned int) RELOC_BASE10
4383 || r_type == (unsigned int) RELOC_BASE13
4384 || r_type == (unsigned int) RELOC_BASE22)
4386 /* If we know the symbol this relocation is against,
4387 convert it into a relocation against a section. This
4388 is what the native linker does. */
4389 if (r_type == (unsigned int) RELOC_BASE10
4390 || r_type == (unsigned int) RELOC_BASE13
4391 || r_type == (unsigned int) RELOC_BASE22)
4394 h = sym_hashes[r_index];
4396 && (h->root.type == bfd_link_hash_defined
4397 || h->root.type == bfd_link_hash_defweak))
4399 asection *output_section;
4401 /* Change the r_extern value. */
4402 if (bfd_header_big_endian (output_bfd))
4403 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4405 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4407 /* Compute a new r_index. */
4408 output_section = h->root.u.def.section->output_section;
4409 if (output_section == obj_textsec (output_bfd))
4411 else if (output_section == obj_datasec (output_bfd))
4413 else if (output_section == obj_bsssec (output_bfd))
4418 /* Add the symbol value and the section VMA to the
4420 relocation = (h->root.u.def.value
4421 + output_section->vma
4422 + h->root.u.def.section->output_offset);
4424 /* Now RELOCATION is the VMA of the final
4425 destination. If this is a PC relative reloc,
4426 then ADDEND is the negative of the source VMA.
4427 We want to set ADDEND to the difference between
4428 the destination VMA and the source VMA, which
4429 means we must adjust RELOCATION by the change in
4430 the source VMA. This is done below. */
4434 /* We must change r_index according to the symbol
4436 r_index = symbol_map[r_index];
4442 /* We decided to strip this symbol, but it
4443 turns out that we can't. Note that we
4444 lose the other and desc information here.
4445 I don't think that will ever matter for a
4451 if (!aout_link_write_other_symbol (&h->root.root,
4461 name = strings + GET_WORD (input_bfd,
4462 syms[r_index].e_strx);
4463 (*flaginfo->info->callbacks->unattached_reloc)
4464 (flaginfo->info, name,
4465 input_bfd, input_section, r_addr);
4472 /* If this is a PC relative reloc, then the addend
4473 is the negative of the source VMA. We must
4474 adjust it by the change in the source VMA. This
4478 /* Write out the new r_index value. */
4479 if (bfd_header_big_endian (output_bfd))
4481 rel->r_index[0] = r_index >> 16;
4482 rel->r_index[1] = r_index >> 8;
4483 rel->r_index[2] = r_index;
4487 rel->r_index[2] = r_index >> 16;
4488 rel->r_index[1] = r_index >> 8;
4489 rel->r_index[0] = r_index;
4494 /* This is a relocation against a section. We must
4495 adjust by the amount that the section moved. */
4496 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4497 relocation = (r_section->output_section->vma
4498 + r_section->output_offset
4501 /* If this is a PC relative reloc, then the addend is
4502 the difference in VMA between the destination and the
4503 source. We have just adjusted for the change in VMA
4504 of the destination, so we must also adjust by the
4505 change in VMA of the source. This is done below. */
4508 /* As described above, we must always adjust a PC relative
4509 reloc by the change in VMA of the source. However, if
4510 pcrel_offset is set, then the addend does not include the
4511 location within the section, in which case we don't need
4512 to adjust anything. */
4513 if (howto_table_ext[r_type].pc_relative
4514 && ! howto_table_ext[r_type].pcrel_offset)
4515 relocation -= (input_section->output_section->vma
4516 + input_section->output_offset
4517 - input_section->vma);
4519 /* Change the addend if necessary. */
4520 if (relocation != 0)
4521 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4523 /* Change the address of the relocation. */
4524 PUT_WORD (output_bfd,
4525 r_addr + input_section->output_offset,
4531 bfd_reloc_status_type r;
4533 /* We are generating an executable, and must do a full
4539 h = sym_hashes[r_index];
4542 && (h->root.type == bfd_link_hash_defined
4543 || h->root.type == bfd_link_hash_defweak))
4545 relocation = (h->root.u.def.value
4546 + h->root.u.def.section->output_section->vma
4547 + h->root.u.def.section->output_offset);
4550 && h->root.type == bfd_link_hash_undefweak)
4558 else if (r_type == (unsigned int) RELOC_BASE10
4559 || r_type == (unsigned int) RELOC_BASE13
4560 || r_type == (unsigned int) RELOC_BASE22)
4562 struct external_nlist *sym;
4565 /* For base relative relocs, r_index is always an index
4566 into the symbol table, even if r_extern is 0. */
4567 sym = syms + r_index;
4568 type = H_GET_8 (input_bfd, sym->e_type);
4569 if ((type & N_TYPE) == N_TEXT
4571 r_section = obj_textsec (input_bfd);
4572 else if ((type & N_TYPE) == N_DATA
4574 r_section = obj_datasec (input_bfd);
4575 else if ((type & N_TYPE) == N_BSS
4577 r_section = obj_bsssec (input_bfd);
4578 else if ((type & N_TYPE) == N_ABS
4580 r_section = bfd_abs_section_ptr;
4583 relocation = (r_section->output_section->vma
4584 + r_section->output_offset
4585 + (GET_WORD (input_bfd, sym->e_value)
4590 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4592 /* If this is a PC relative reloc, then R_ADDEND is the
4593 difference between the two vmas, or
4594 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4596 old_dest_sec == section->vma
4598 old_src_sec == input_section->vma
4600 old_src_off == r_addr
4602 _bfd_final_link_relocate expects RELOCATION +
4603 R_ADDEND to be the VMA of the destination minus
4604 r_addr (the minus r_addr is because this relocation
4605 is not pcrel_offset, which is a bit confusing and
4606 should, perhaps, be changed), or
4609 new_dest_sec == output_section->vma + output_offset
4610 We arrange for this to happen by setting RELOCATION to
4611 new_dest_sec + old_src_sec - old_dest_sec
4613 If this is not a PC relative reloc, then R_ADDEND is
4614 simply the VMA of the destination, so we set
4615 RELOCATION to the change in the destination VMA, or
4616 new_dest_sec - old_dest_sec
4618 relocation = (r_section->output_section->vma
4619 + r_section->output_offset
4621 if (howto_table_ext[r_type].pc_relative)
4622 relocation += input_section->vma;
4625 if (check_dynamic_reloc != NULL)
4629 if (! ((*check_dynamic_reloc)
4630 (flaginfo->info, input_bfd, input_section, h,
4631 (void *) rel, contents, &skip, &relocation)))
4637 /* Now warn if a global symbol is undefined. We could not
4638 do this earlier, because check_dynamic_reloc might want
4639 to skip this reloc. */
4641 && ! bfd_link_pic (flaginfo->info)
4642 && r_type != (unsigned int) RELOC_BASE10
4643 && r_type != (unsigned int) RELOC_BASE13
4644 && r_type != (unsigned int) RELOC_BASE22)
4649 name = h->root.root.string;
4651 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4652 (*flaginfo->info->callbacks->undefined_symbol)
4653 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE);
4656 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4657 r = MY_final_link_relocate (howto_table_ext + r_type,
4658 input_bfd, input_section,
4659 contents, r_addr, relocation,
4665 x = bfd_get_32 (input_bfd, contents + r_addr);
4666 x = x + relocation + r_addend;
4667 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4671 if (r != bfd_reloc_ok)
4676 case bfd_reloc_outofrange:
4678 case bfd_reloc_overflow:
4685 || r_type == (unsigned int) RELOC_BASE10
4686 || r_type == (unsigned int) RELOC_BASE13
4687 || r_type == (unsigned int) RELOC_BASE22)
4688 name = strings + GET_WORD (input_bfd,
4689 syms[r_index].e_strx);
4694 s = aout_reloc_index_to_section (input_bfd, r_index);
4695 name = bfd_section_name (input_bfd, s);
4697 (*flaginfo->info->callbacks->reloc_overflow)
4698 (flaginfo->info, (h ? &h->root : NULL), name,
4699 howto_table_ext[r_type].name,
4700 r_addend, input_bfd, input_section, r_addr);
4711 /* Link an a.out section into the output file. */
4714 aout_link_input_section (struct aout_final_link_info *flaginfo,
4716 asection *input_section,
4717 file_ptr *reloff_ptr,
4718 bfd_size_type rel_size)
4720 bfd_size_type input_size;
4723 /* Get the section contents. */
4724 input_size = input_section->size;
4725 if (! bfd_get_section_contents (input_bfd, input_section,
4726 (void *) flaginfo->contents,
4727 (file_ptr) 0, input_size))
4730 /* Read in the relocs if we haven't already done it. */
4731 if (aout_section_data (input_section) != NULL
4732 && aout_section_data (input_section)->relocs != NULL)
4733 relocs = aout_section_data (input_section)->relocs;
4736 relocs = flaginfo->relocs;
4739 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4740 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4745 /* Relocate the section contents. */
4746 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4748 if (! aout_link_input_section_std (flaginfo, input_bfd, input_section,
4749 (struct reloc_std_external *) relocs,
4750 rel_size, flaginfo->contents))
4755 if (! aout_link_input_section_ext (flaginfo, input_bfd, input_section,
4756 (struct reloc_ext_external *) relocs,
4757 rel_size, flaginfo->contents))
4761 /* Write out the section contents. */
4762 if (! bfd_set_section_contents (flaginfo->output_bfd,
4763 input_section->output_section,
4764 (void *) flaginfo->contents,
4765 (file_ptr) input_section->output_offset,
4769 /* If we are producing relocatable output, the relocs were
4770 modified, and we now write them out. */
4771 if (bfd_link_relocatable (flaginfo->info) && rel_size > 0)
4773 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4775 if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size)
4777 *reloff_ptr += rel_size;
4779 /* Assert that the relocs have not run into the symbols, and
4780 that if these are the text relocs they have not run into the
4782 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
4783 && (reloff_ptr != &flaginfo->treloff
4785 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
4791 /* Adjust and write out the symbols for an a.out file. Set the new
4792 symbol indices into a symbol_map. */
4795 aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd)
4798 bfd_size_type sym_count;
4800 enum bfd_link_strip strip;
4801 enum bfd_link_discard discard;
4802 struct external_nlist *outsym;
4803 bfd_size_type strtab_index;
4804 struct external_nlist *sym;
4805 struct external_nlist *sym_end;
4806 struct aout_link_hash_entry **sym_hash;
4809 bfd_boolean skip_next;
4811 output_bfd = flaginfo->output_bfd;
4812 sym_count = obj_aout_external_sym_count (input_bfd);
4813 strings = obj_aout_external_strings (input_bfd);
4814 strip = flaginfo->info->strip;
4815 discard = flaginfo->info->discard;
4816 outsym = flaginfo->output_syms;
4818 /* First write out a symbol for this object file, unless we are
4819 discarding such symbols. */
4820 if (strip != strip_all
4821 && (strip != strip_some
4822 || bfd_hash_lookup (flaginfo->info->keep_hash, input_bfd->filename,
4823 FALSE, FALSE) != NULL)
4824 && discard != discard_all)
4826 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4827 H_PUT_8 (output_bfd, 0, outsym->e_other);
4828 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4829 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
4830 input_bfd->filename, FALSE);
4831 if (strtab_index == (bfd_size_type) -1)
4833 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4834 PUT_WORD (output_bfd,
4835 (bfd_get_section_vma (output_bfd,
4836 obj_textsec (input_bfd)->output_section)
4837 + obj_textsec (input_bfd)->output_offset),
4839 ++obj_aout_external_sym_count (output_bfd);
4845 sym = obj_aout_external_syms (input_bfd);
4846 sym_end = sym + sym_count;
4847 sym_hash = obj_aout_sym_hashes (input_bfd);
4848 symbol_map = flaginfo->symbol_map;
4849 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4850 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4854 struct aout_link_hash_entry *h;
4860 /* We set *symbol_map to 0 above for all symbols. If it has
4861 already been set to -1 for this symbol, it means that we are
4862 discarding it because it appears in a duplicate header file.
4863 See the N_BINCL code below. */
4864 if (*symbol_map == -1)
4867 /* Initialize *symbol_map to -1, which means that the symbol was
4868 not copied into the output file. We will change it later if
4869 we do copy the symbol over. */
4872 type = H_GET_8 (input_bfd, sym->e_type);
4873 name = strings + GET_WORD (input_bfd, sym->e_strx);
4879 /* Pass this symbol through. It is the target of an
4880 indirect or warning symbol. */
4881 val = GET_WORD (input_bfd, sym->e_value);
4886 /* Skip this symbol, which is the target of an indirect
4887 symbol that we have changed to no longer be an indirect
4894 struct aout_link_hash_entry *hresolve;
4896 /* We have saved the hash table entry for this symbol, if
4897 there is one. Note that we could just look it up again
4898 in the hash table, provided we first check that it is an
4902 /* Use the name from the hash table, in case the symbol was
4905 && h->root.type != bfd_link_hash_warning)
4906 name = h->root.root.string;
4908 /* If this is an indirect or warning symbol, then change
4909 hresolve to the base symbol. We also change *sym_hash so
4910 that the relocation routines relocate against the real
4913 if (h != (struct aout_link_hash_entry *) NULL
4914 && (h->root.type == bfd_link_hash_indirect
4915 || h->root.type == bfd_link_hash_warning))
4917 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4918 while (hresolve->root.type == bfd_link_hash_indirect
4919 || hresolve->root.type == bfd_link_hash_warning)
4920 hresolve = ((struct aout_link_hash_entry *)
4921 hresolve->root.u.i.link);
4922 *sym_hash = hresolve;
4925 /* If the symbol has already been written out, skip it. */
4929 if ((type & N_TYPE) == N_INDR
4930 || type == N_WARNING)
4932 *symbol_map = h->indx;
4936 /* See if we are stripping this symbol. */
4942 case strip_debugger:
4943 if ((type & N_STAB) != 0)
4947 if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE)
4962 /* Get the value of the symbol. */
4963 if ((type & N_TYPE) == N_TEXT
4965 symsec = obj_textsec (input_bfd);
4966 else if ((type & N_TYPE) == N_DATA
4968 symsec = obj_datasec (input_bfd);
4969 else if ((type & N_TYPE) == N_BSS
4971 symsec = obj_bsssec (input_bfd);
4972 else if ((type & N_TYPE) == N_ABS
4974 symsec = bfd_abs_section_ptr;
4975 else if (((type & N_TYPE) == N_INDR
4976 && (hresolve == NULL
4977 || (hresolve->root.type != bfd_link_hash_defined
4978 && hresolve->root.type != bfd_link_hash_defweak
4979 && hresolve->root.type != bfd_link_hash_common)))
4980 || type == N_WARNING)
4982 /* Pass the next symbol through unchanged. The
4983 condition above for indirect symbols is so that if
4984 the indirect symbol was defined, we output it with
4985 the correct definition so the debugger will
4988 val = GET_WORD (input_bfd, sym->e_value);
4991 else if ((type & N_STAB) != 0)
4993 val = GET_WORD (input_bfd, sym->e_value);
4998 /* If we get here with an indirect symbol, it means that
4999 we are outputting it with a real definition. In such
5000 a case we do not want to output the next symbol,
5001 which is the target of the indirection. */
5002 if ((type & N_TYPE) == N_INDR)
5007 /* We need to get the value from the hash table. We use
5008 hresolve so that if we have defined an indirect
5009 symbol we output the final definition. */
5012 switch (type & N_TYPE)
5015 symsec = obj_textsec (input_bfd);
5018 symsec = obj_datasec (input_bfd);
5021 symsec = obj_bsssec (input_bfd);
5024 symsec = bfd_abs_section_ptr;
5031 else if (hresolve->root.type == bfd_link_hash_defined
5032 || hresolve->root.type == bfd_link_hash_defweak)
5034 asection *input_section;
5035 asection *output_section;
5037 /* This case usually means a common symbol which was
5038 turned into a defined symbol. */
5039 input_section = hresolve->root.u.def.section;
5040 output_section = input_section->output_section;
5041 BFD_ASSERT (bfd_is_abs_section (output_section)
5042 || output_section->owner == output_bfd);
5043 val = (hresolve->root.u.def.value
5044 + bfd_get_section_vma (output_bfd, output_section)
5045 + input_section->output_offset);
5047 /* Get the correct type based on the section. If
5048 this is a constructed set, force it to be
5049 globally visible. */
5058 if (output_section == obj_textsec (output_bfd))
5059 type |= (hresolve->root.type == bfd_link_hash_defined
5062 else if (output_section == obj_datasec (output_bfd))
5063 type |= (hresolve->root.type == bfd_link_hash_defined
5066 else if (output_section == obj_bsssec (output_bfd))
5067 type |= (hresolve->root.type == bfd_link_hash_defined
5071 type |= (hresolve->root.type == bfd_link_hash_defined
5075 else if (hresolve->root.type == bfd_link_hash_common)
5076 val = hresolve->root.u.c.size;
5077 else if (hresolve->root.type == bfd_link_hash_undefweak)
5086 val = (symsec->output_section->vma
5087 + symsec->output_offset
5088 + (GET_WORD (input_bfd, sym->e_value)
5091 /* If this is a global symbol set the written flag, and if
5092 it is a local symbol see if we should discard it. */
5096 h->indx = obj_aout_external_sym_count (output_bfd);
5098 else if ((type & N_TYPE) != N_SETT
5099 && (type & N_TYPE) != N_SETD
5100 && (type & N_TYPE) != N_SETB
5101 && (type & N_TYPE) != N_SETA)
5106 case discard_sec_merge:
5109 if ((type & N_STAB) == 0
5110 && bfd_is_local_label_name (input_bfd, name))
5124 /* An N_BINCL symbol indicates the start of the stabs
5125 entries for a header file. We need to scan ahead to the
5126 next N_EINCL symbol, ignoring nesting, adding up all the
5127 characters in the symbol names, not including the file
5128 numbers in types (the first number after an open
5130 if (type == (int) N_BINCL)
5132 struct external_nlist *incl_sym;
5134 struct aout_link_includes_entry *incl_entry;
5135 struct aout_link_includes_totals *t;
5139 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5143 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5144 if (incl_type == (int) N_EINCL)
5150 else if (incl_type == (int) N_BINCL)
5156 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5157 for (; *s != '\0'; s++)
5162 /* Skip the file number. */
5164 while (ISDIGIT (*s))
5172 /* If we have already included a header file with the
5173 same value, then replace this one with an N_EXCL
5175 copy = (bfd_boolean) (! flaginfo->info->keep_memory);
5176 incl_entry = aout_link_includes_lookup (&flaginfo->includes,
5178 if (incl_entry == NULL)
5180 for (t = incl_entry->totals; t != NULL; t = t->next)
5181 if (t->total == val)
5185 /* This is the first time we have seen this header
5186 file with this set of stabs strings. */
5187 t = (struct aout_link_includes_totals *)
5188 bfd_hash_allocate (&flaginfo->includes.root,
5193 t->next = incl_entry->totals;
5194 incl_entry->totals = t;
5200 /* This is a duplicate header file. We must change
5201 it to be an N_EXCL entry, and mark all the
5202 included symbols to prevent outputting them. */
5203 type = (int) N_EXCL;
5206 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5208 incl_sym++, incl_map++)
5212 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5213 if (incl_type == (int) N_EINCL)
5222 else if (incl_type == (int) N_BINCL)
5231 /* Copy this symbol into the list of symbols we are going to
5233 H_PUT_8 (output_bfd, type, outsym->e_type);
5234 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5235 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5237 if (! flaginfo->info->keep_memory)
5239 /* name points into a string table which we are going to
5240 free. If there is a hash table entry, use that string.
5241 Otherwise, copy name into memory. */
5243 name = h->root.root.string;
5247 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
5249 if (strtab_index == (bfd_size_type) -1)
5251 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5252 PUT_WORD (output_bfd, val, outsym->e_value);
5253 *symbol_map = obj_aout_external_sym_count (output_bfd);
5254 ++obj_aout_external_sym_count (output_bfd);
5258 /* Write out the output symbols we have just constructed. */
5259 if (outsym > flaginfo->output_syms)
5261 bfd_size_type outsym_size;
5263 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0)
5265 outsym_size = outsym - flaginfo->output_syms;
5266 outsym_size *= EXTERNAL_NLIST_SIZE;
5267 if (bfd_bwrite ((void *) flaginfo->output_syms, outsym_size, output_bfd)
5270 flaginfo->symoff += outsym_size;
5276 /* Link an a.out input BFD into the output file. */
5279 aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd)
5281 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5283 /* If this is a dynamic object, it may need special handling. */
5284 if ((input_bfd->flags & DYNAMIC) != 0
5285 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5286 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5287 (flaginfo->info, input_bfd));
5289 /* Get the symbols. We probably have them already, unless
5290 flaginfo->info->keep_memory is FALSE. */
5291 if (! aout_get_external_symbols (input_bfd))
5294 /* Write out the symbols and get a map of the new indices. The map
5295 is placed into flaginfo->symbol_map. */
5296 if (! aout_link_write_symbols (flaginfo, input_bfd))
5299 /* Relocate and write out the sections. These functions use the
5300 symbol map created by aout_link_write_symbols. The linker_mark
5301 field will be set if these sections are to be included in the
5302 link, which will normally be the case. */
5303 if (obj_textsec (input_bfd)->linker_mark)
5305 if (! aout_link_input_section (flaginfo, input_bfd,
5306 obj_textsec (input_bfd),
5308 exec_hdr (input_bfd)->a_trsize))
5311 if (obj_datasec (input_bfd)->linker_mark)
5313 if (! aout_link_input_section (flaginfo, input_bfd,
5314 obj_datasec (input_bfd),
5316 exec_hdr (input_bfd)->a_drsize))
5320 /* If we are not keeping memory, we don't need the symbols any
5321 longer. We still need them if we are keeping memory, because the
5322 strings in the hash table point into them. */
5323 if (! flaginfo->info->keep_memory)
5325 if (! aout_link_free_symbols (input_bfd))
5332 /* Do the final link step. This is called on the output BFD. The
5333 INFO structure should point to a list of BFDs linked through the
5334 link.next field which can be used to find each BFD which takes part
5335 in the output. Also, each section in ABFD should point to a list
5336 of bfd_link_order structures which list all the input sections for
5337 the output section. */
5340 NAME (aout, final_link) (bfd *abfd,
5341 struct bfd_link_info *info,
5342 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5344 struct aout_final_link_info aout_info;
5345 bfd_boolean includes_hash_initialized = FALSE;
5347 bfd_size_type trsize, drsize;
5348 bfd_size_type max_contents_size;
5349 bfd_size_type max_relocs_size;
5350 bfd_size_type max_sym_count;
5351 struct bfd_link_order *p;
5353 bfd_boolean have_link_order_relocs;
5355 if (bfd_link_pic (info))
5356 abfd->flags |= DYNAMIC;
5358 aout_info.info = info;
5359 aout_info.output_bfd = abfd;
5360 aout_info.contents = NULL;
5361 aout_info.relocs = NULL;
5362 aout_info.symbol_map = NULL;
5363 aout_info.output_syms = NULL;
5365 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5366 aout_link_includes_newfunc,
5367 sizeof (struct aout_link_includes_entry),
5370 includes_hash_initialized = TRUE;
5372 /* Figure out the largest section size. Also, if generating
5373 relocatable output, count the relocs. */
5376 max_contents_size = 0;
5377 max_relocs_size = 0;
5379 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5383 if (bfd_link_relocatable (info))
5385 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5387 trsize += exec_hdr (sub)->a_trsize;
5388 drsize += exec_hdr (sub)->a_drsize;
5392 /* FIXME: We need to identify the .text and .data sections
5393 and call get_reloc_upper_bound and canonicalize_reloc to
5394 work out the number of relocs needed, and then multiply
5395 by the reloc size. */
5397 /* xgettext:c-format */
5398 (_("%s: relocatable link from %s to %s not supported"),
5399 bfd_get_filename (abfd),
5400 sub->xvec->name, abfd->xvec->name);
5401 bfd_set_error (bfd_error_invalid_operation);
5406 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5408 sz = obj_textsec (sub)->size;
5409 if (sz > max_contents_size)
5410 max_contents_size = sz;
5411 sz = obj_datasec (sub)->size;
5412 if (sz > max_contents_size)
5413 max_contents_size = sz;
5415 sz = exec_hdr (sub)->a_trsize;
5416 if (sz > max_relocs_size)
5417 max_relocs_size = sz;
5418 sz = exec_hdr (sub)->a_drsize;
5419 if (sz > max_relocs_size)
5420 max_relocs_size = sz;
5422 sz = obj_aout_external_sym_count (sub);
5423 if (sz > max_sym_count)
5428 if (bfd_link_relocatable (info))
5430 if (obj_textsec (abfd) != NULL)
5431 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5432 ->map_head.link_order)
5433 * obj_reloc_entry_size (abfd));
5434 if (obj_datasec (abfd) != NULL)
5435 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5436 ->map_head.link_order)
5437 * obj_reloc_entry_size (abfd));
5440 exec_hdr (abfd)->a_trsize = trsize;
5441 exec_hdr (abfd)->a_drsize = drsize;
5443 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5445 /* Adjust the section sizes and vmas according to the magic number.
5446 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5447 filepos for each section. */
5448 if (! NAME (aout, adjust_sizes_and_vmas) (abfd))
5451 /* The relocation and symbol file positions differ among a.out
5452 targets. We are passed a callback routine from the backend
5453 specific code to handle this.
5454 FIXME: At this point we do not know how much space the symbol
5455 table will require. This will not work for any (nonstandard)
5456 a.out target that needs to know the symbol table size before it
5457 can compute the relocation file positions. This may or may not
5458 be the case for the hp300hpux target, for example. */
5459 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5461 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5462 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5463 obj_sym_filepos (abfd) = aout_info.symoff;
5465 /* We keep a count of the symbols as we output them. */
5466 obj_aout_external_sym_count (abfd) = 0;
5468 /* We accumulate the string table as we write out the symbols. */
5469 aout_info.strtab = _bfd_stringtab_init ();
5470 if (aout_info.strtab == NULL)
5473 /* Allocate buffers to hold section contents and relocs. */
5474 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
5475 aout_info.relocs = bfd_malloc (max_relocs_size);
5476 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int));
5477 aout_info.output_syms = (struct external_nlist *)
5478 bfd_malloc ((max_sym_count + 1) * sizeof (struct external_nlist));
5479 if ((aout_info.contents == NULL && max_contents_size != 0)
5480 || (aout_info.relocs == NULL && max_relocs_size != 0)
5481 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5482 || aout_info.output_syms == NULL)
5485 /* If we have a symbol named __DYNAMIC, force it out now. This is
5486 required by SunOS. Doing this here rather than in sunos.c is a
5487 hack, but it's easier than exporting everything which would be
5490 struct aout_link_hash_entry *h;
5492 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5493 FALSE, FALSE, FALSE);
5495 aout_link_write_other_symbol (&h->root.root, &aout_info);
5498 /* The most time efficient way to do the link would be to read all
5499 the input object files into memory and then sort out the
5500 information into the output file. Unfortunately, that will
5501 probably use too much memory. Another method would be to step
5502 through everything that composes the text section and write it
5503 out, and then everything that composes the data section and write
5504 it out, and then write out the relocs, and then write out the
5505 symbols. Unfortunately, that requires reading stuff from each
5506 input file several times, and we will not be able to keep all the
5507 input files open simultaneously, and reopening them will be slow.
5509 What we do is basically process one input file at a time. We do
5510 everything we need to do with an input file once--copy over the
5511 section contents, handle the relocation information, and write
5512 out the symbols--and then we throw away the information we read
5513 from it. This approach requires a lot of lseeks of the output
5514 file, which is unfortunate but still faster than reopening a lot
5517 We use the output_has_begun field of the input BFDs to see
5518 whether we have already handled it. */
5519 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5520 sub->output_has_begun = FALSE;
5522 /* Mark all sections which are to be included in the link. This
5523 will normally be every section. We need to do this so that we
5524 can identify any sections which the linker has decided to not
5526 for (o = abfd->sections; o != NULL; o = o->next)
5528 for (p = o->map_head.link_order; p != NULL; p = p->next)
5529 if (p->type == bfd_indirect_link_order)
5530 p->u.indirect.section->linker_mark = TRUE;
5533 have_link_order_relocs = FALSE;
5534 for (o = abfd->sections; o != NULL; o = o->next)
5536 for (p = o->map_head.link_order;
5540 if (p->type == bfd_indirect_link_order
5541 && (bfd_get_flavour (p->u.indirect.section->owner)
5542 == bfd_target_aout_flavour))
5546 input_bfd = p->u.indirect.section->owner;
5547 if (! input_bfd->output_has_begun)
5549 if (! aout_link_input_bfd (&aout_info, input_bfd))
5551 input_bfd->output_has_begun = TRUE;
5554 else if (p->type == bfd_section_reloc_link_order
5555 || p->type == bfd_symbol_reloc_link_order)
5557 /* These are handled below. */
5558 have_link_order_relocs = TRUE;
5562 if (! _bfd_default_link_order (abfd, info, o, p))
5568 /* Write out any symbols that we have not already written out. */
5569 bfd_hash_traverse (&info->hash->table,
5570 aout_link_write_other_symbol,
5573 /* Now handle any relocs we were asked to create by the linker.
5574 These did not come from any input file. We must do these after
5575 we have written out all the symbols, so that we know the symbol
5577 if (have_link_order_relocs)
5579 for (o = abfd->sections; o != NULL; o = o->next)
5581 for (p = o->map_head.link_order;
5585 if (p->type == bfd_section_reloc_link_order
5586 || p->type == bfd_symbol_reloc_link_order)
5588 if (! aout_link_reloc_link_order (&aout_info, o, p))
5595 if (aout_info.contents != NULL)
5597 free (aout_info.contents);
5598 aout_info.contents = NULL;
5600 if (aout_info.relocs != NULL)
5602 free (aout_info.relocs);
5603 aout_info.relocs = NULL;
5605 if (aout_info.symbol_map != NULL)
5607 free (aout_info.symbol_map);
5608 aout_info.symbol_map = NULL;
5610 if (aout_info.output_syms != NULL)
5612 free (aout_info.output_syms);
5613 aout_info.output_syms = NULL;
5615 if (includes_hash_initialized)
5617 bfd_hash_table_free (&aout_info.includes.root);
5618 includes_hash_initialized = FALSE;
5621 /* Finish up any dynamic linking we may be doing. */
5622 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5624 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5628 /* Update the header information. */
5629 abfd->symcount = obj_aout_external_sym_count (abfd);
5630 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5631 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5632 obj_textsec (abfd)->reloc_count =
5633 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5634 obj_datasec (abfd)->reloc_count =
5635 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5637 /* Write out the string table, unless there are no symbols. */
5638 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
5640 if (abfd->symcount > 0)
5642 if (!emit_stringtab (abfd, aout_info.strtab))
5647 bfd_byte b[BYTES_IN_WORD];
5649 memset (b, 0, BYTES_IN_WORD);
5650 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
5657 if (aout_info.contents != NULL)
5658 free (aout_info.contents);
5659 if (aout_info.relocs != NULL)
5660 free (aout_info.relocs);
5661 if (aout_info.symbol_map != NULL)
5662 free (aout_info.symbol_map);
5663 if (aout_info.output_syms != NULL)
5664 free (aout_info.output_syms);
5665 if (includes_hash_initialized)
5666 bfd_hash_table_free (&aout_info.includes.root);