1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2018 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, and
37 386 a.out files, to create a target jump vector for a specific
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 and @file{demo64.c} for a demonstration of a 64 bit a.out format.
44 The base file @file{aoutx.h} defines general mechanisms for
45 reading and writing records to and from disk and various
46 other methods which BFD requires. It is included by
47 @file{aout32.c} and @file{aout64.c} to form the names
48 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
50 As an example, this is what goes on to make the back end for a
51 sun4, from @file{aout32.c}:
53 | #define ARCH_SIZE 32
59 | aout_32_canonicalize_reloc
60 | aout_32_find_nearest_line
62 | aout_32_get_reloc_upper_bound
67 | #define TARGET_NAME "a.out-sunos-big"
68 | #define VECNAME sparc_aout_sunos_be_vec
71 requires all the names from @file{aout32.c}, and produces the jump vector
73 | sparc_aout_sunos_be_vec
75 The file @file{host-aout.c} is a special case. It is for a large set
76 of hosts that use ``more or less standard'' a.out files, and
77 for which cross-debugging is not interesting. It uses the
78 standard 32-bit a.out support routines, but determines the
79 file offsets and addresses of the text, data, and BSS
80 sections, the machine architecture and machine type, and the
81 entry point address, in a host-dependent manner. Once these
82 values have been determined, generic code is used to handle
85 When porting it to run on a new system, you must supply:
89 | HOST_MACHINE_ARCH (optional)
90 | HOST_MACHINE_MACHINE (optional)
91 | HOST_TEXT_START_ADDR
94 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
95 values, plus the structures and macros defined in @file{a.out.h} on
96 your host system, will produce a BFD target that will access
97 ordinary a.out files on your host. To configure a new machine
98 to use @file{host-aout.c}, specify:
100 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
101 | TDEPFILES= host-aout.o trad-core.o
103 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
105 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
106 configuration is selected. */
109 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
110 Doesn't matter what the setting of WP_TEXT is on output, but it'll
112 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
113 * Any BFD with both flags clear is OMAGIC.
114 (Just want to make these explicit, so the conditions tested in this
115 file make sense if you're more familiar with a.out than with BFD.) */
117 #define KEEPIT udata.i
121 #include "safe-ctype.h"
126 #include "aout/aout64.h"
127 #include "aout/stab_gnu.h"
135 The file @file{aoutx.h} provides for both the @emph{standard}
136 and @emph{extended} forms of a.out relocation records.
138 The standard records contain only an address, a symbol index,
139 and a type field. The extended records also have a full
140 integer for an addend. */
142 #ifndef CTOR_TABLE_RELOC_HOWTO
143 #define CTOR_TABLE_RELOC_IDX 2
144 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
145 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
146 ? howto_table_ext : howto_table_std) \
147 + CTOR_TABLE_RELOC_IDX)
150 #ifndef MY_swap_std_reloc_in
151 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
154 #ifndef MY_swap_ext_reloc_in
155 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
158 #ifndef MY_swap_std_reloc_out
159 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
162 #ifndef MY_swap_ext_reloc_out
163 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
166 #ifndef MY_final_link_relocate
167 #define MY_final_link_relocate _bfd_final_link_relocate
170 #ifndef MY_relocate_contents
171 #define MY_relocate_contents _bfd_relocate_contents
174 #define howto_table_ext NAME (aout, ext_howto_table)
175 #define howto_table_std NAME (aout, std_howto_table)
177 reloc_howto_type howto_table_ext[] =
179 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
180 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE),
181 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE),
182 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE),
183 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE),
184 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE),
185 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE),
186 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE),
187 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE),
188 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE),
189 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE),
190 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE),
191 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE),
192 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE),
193 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE),
194 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE),
195 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE),
196 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE),
197 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE),
198 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE),
199 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE),
200 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE),
201 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE),
202 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE),
203 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE),
204 HOWTO (0, 0, 3, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
205 HOWTO (0, 0, 3, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
206 #define RELOC_SPARC_REV32 RELOC_WDISP19
207 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE),
210 /* Convert standard reloc records to "arelent" format (incl byte swap). */
212 reloc_howto_type howto_table_std[] =
214 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
215 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
216 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
217 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
218 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
219 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
220 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
221 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
222 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
223 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
224 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
225 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
231 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
247 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
255 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
258 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
261 NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
263 #define EXT(i, j) case i: return & howto_table_ext [j]
264 #define STD(i, j) case i: return & howto_table_std [j]
265 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
267 if (code == BFD_RELOC_CTOR)
268 switch (bfd_arch_bits_per_address (abfd))
281 EXT (BFD_RELOC_8, 0);
282 EXT (BFD_RELOC_16, 1);
283 EXT (BFD_RELOC_32, 2);
284 EXT (BFD_RELOC_HI22, 8);
285 EXT (BFD_RELOC_LO10, 11);
286 EXT (BFD_RELOC_32_PCREL_S2, 6);
287 EXT (BFD_RELOC_SPARC_WDISP22, 7);
288 EXT (BFD_RELOC_SPARC13, 10);
289 EXT (BFD_RELOC_SPARC_GOT10, 14);
290 EXT (BFD_RELOC_SPARC_BASE13, 15);
291 EXT (BFD_RELOC_SPARC_GOT13, 15);
292 EXT (BFD_RELOC_SPARC_GOT22, 16);
293 EXT (BFD_RELOC_SPARC_PC10, 17);
294 EXT (BFD_RELOC_SPARC_PC22, 18);
295 EXT (BFD_RELOC_SPARC_WPLT30, 19);
296 EXT (BFD_RELOC_SPARC_REV32, 26);
304 STD (BFD_RELOC_8, 0);
305 STD (BFD_RELOC_16, 1);
306 STD (BFD_RELOC_32, 2);
307 STD (BFD_RELOC_8_PCREL, 4);
308 STD (BFD_RELOC_16_PCREL, 5);
309 STD (BFD_RELOC_32_PCREL, 6);
310 STD (BFD_RELOC_16_BASEREL, 9);
311 STD (BFD_RELOC_32_BASEREL, 10);
318 NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name)
320 unsigned int i, size;
321 reloc_howto_type *howto_table;
323 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE)
325 howto_table = howto_table_ext;
326 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]);
330 howto_table = howto_table_std;
331 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]);
334 for (i = 0; i < size; i++)
335 if (howto_table[i].name != NULL
336 && strcasecmp (howto_table[i].name, r_name) == 0)
337 return &howto_table[i];
344 Internal entry points
347 @file{aoutx.h} exports several routines for accessing the
348 contents of an a.out file, which are gathered and exported in
349 turn by various format specific files (eg sunos.c).
354 aout_@var{size}_swap_exec_header_in
357 void aout_@var{size}_swap_exec_header_in,
359 struct external_exec *bytes,
360 struct internal_exec *execp);
363 Swap the information in an executable header @var{raw_bytes} taken
364 from a raw byte stream memory image into the internal exec header
365 structure @var{execp}.
368 #ifndef NAME_swap_exec_header_in
370 NAME (aout, swap_exec_header_in) (bfd *abfd,
371 struct external_exec *bytes,
372 struct internal_exec *execp)
374 /* The internal_exec structure has some fields that are unused in this
375 configuration (IE for i960), so ensure that all such uninitialized
376 fields are zero'd out. There are places where two of these structs
377 are memcmp'd, and thus the contents do matter. */
378 memset ((void *) execp, 0, sizeof (struct internal_exec));
379 /* Now fill in fields in the execp, from the bytes in the raw data. */
380 execp->a_info = H_GET_32 (abfd, bytes->e_info);
381 execp->a_text = GET_WORD (abfd, bytes->e_text);
382 execp->a_data = GET_WORD (abfd, bytes->e_data);
383 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
384 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
385 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
386 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
387 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
389 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
394 aout_@var{size}_swap_exec_header_out
397 void aout_@var{size}_swap_exec_header_out
399 struct internal_exec *execp,
400 struct external_exec *raw_bytes);
403 Swap the information in an internal exec header structure
404 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
407 NAME (aout, swap_exec_header_out) (bfd *abfd,
408 struct internal_exec *execp,
409 struct external_exec *bytes)
411 /* Now fill in fields in the raw data, from the fields in the exec struct. */
412 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
413 PUT_WORD (abfd, execp->a_text , bytes->e_text);
414 PUT_WORD (abfd, execp->a_data , bytes->e_data);
415 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
416 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
417 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
418 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
419 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
422 /* Make all the section for an a.out file. */
425 NAME (aout, make_sections) (bfd *abfd)
427 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL)
429 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL)
431 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL)
438 aout_@var{size}_some_aout_object_p
441 const bfd_target *aout_@var{size}_some_aout_object_p
443 struct internal_exec *execp,
444 const bfd_target *(*callback_to_real_object_p) (bfd *));
447 Some a.out variant thinks that the file open in @var{abfd}
448 checking is an a.out file. Do some more checking, and set up
449 for access if it really is. Call back to the calling
450 environment's "finish up" function just before returning, to
451 handle any last-minute setup.
455 NAME (aout, some_aout_object_p) (bfd *abfd,
456 struct internal_exec *execp,
457 const bfd_target *(*callback_to_real_object_p) (bfd *))
459 struct aout_data_struct *rawptr, *oldrawptr;
460 const bfd_target *result;
461 bfd_size_type amt = sizeof (* rawptr);
463 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
467 oldrawptr = abfd->tdata.aout_data;
468 abfd->tdata.aout_data = rawptr;
470 /* Copy the contents of the old tdata struct.
471 In particular, we want the subformat, since for hpux it was set in
472 hp300hpux.c:swap_exec_header_in and will be used in
473 hp300hpux.c:callback. */
474 if (oldrawptr != NULL)
475 *abfd->tdata.aout_data = *oldrawptr;
477 abfd->tdata.aout_data->a.hdr = &rawptr->e;
478 /* Copy in the internal_exec struct. */
479 *(abfd->tdata.aout_data->a.hdr) = *execp;
480 execp = abfd->tdata.aout_data->a.hdr;
482 /* Set the file flags. */
483 abfd->flags = BFD_NO_FLAGS;
484 if (execp->a_drsize || execp->a_trsize)
485 abfd->flags |= HAS_RELOC;
486 /* Setting of EXEC_P has been deferred to the bottom of this function. */
488 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
489 if (N_DYNAMIC (execp))
490 abfd->flags |= DYNAMIC;
492 if (N_MAGIC (execp) == ZMAGIC)
494 abfd->flags |= D_PAGED | WP_TEXT;
495 adata (abfd).magic = z_magic;
497 else if (N_MAGIC (execp) == QMAGIC)
499 abfd->flags |= D_PAGED | WP_TEXT;
500 adata (abfd).magic = z_magic;
501 adata (abfd).subformat = q_magic_format;
503 else if (N_MAGIC (execp) == NMAGIC)
505 abfd->flags |= WP_TEXT;
506 adata (abfd).magic = n_magic;
508 else if (N_MAGIC (execp) == OMAGIC
509 || N_MAGIC (execp) == BMAGIC)
510 adata (abfd).magic = o_magic;
512 /* Should have been checked with N_BADMAG before this routine
516 bfd_get_start_address (abfd) = execp->a_entry;
518 obj_aout_symbols (abfd) = NULL;
519 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
521 /* The default relocation entry size is that of traditional V7 Unix. */
522 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
524 /* The default symbol entry size is that of traditional Unix. */
525 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
528 bfd_init_window (&obj_aout_sym_window (abfd));
529 bfd_init_window (&obj_aout_string_window (abfd));
531 obj_aout_external_syms (abfd) = NULL;
532 obj_aout_external_strings (abfd) = NULL;
533 obj_aout_sym_hashes (abfd) = NULL;
535 if (! NAME (aout, make_sections) (abfd))
538 obj_datasec (abfd)->size = execp->a_data;
539 obj_bsssec (abfd)->size = execp->a_bss;
541 obj_textsec (abfd)->flags =
542 (execp->a_trsize != 0
543 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
544 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
545 obj_datasec (abfd)->flags =
546 (execp->a_drsize != 0
547 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
548 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
549 obj_bsssec (abfd)->flags = SEC_ALLOC;
551 #ifdef THIS_IS_ONLY_DOCUMENTATION
552 /* The common code can't fill in these things because they depend
553 on either the start address of the text segment, the rounding
554 up of virtual addresses between segments, or the starting file
555 position of the text segment -- all of which varies among different
556 versions of a.out. */
558 /* Call back to the format-dependent code to fill in the rest of the
559 fields and do any further cleanup. Things that should be filled
560 in by the callback: */
562 struct exec *execp = exec_hdr (abfd);
564 obj_textsec (abfd)->size = N_TXTSIZE (execp);
565 /* Data and bss are already filled in since they're so standard. */
567 /* The virtual memory addresses of the sections. */
568 obj_textsec (abfd)->vma = N_TXTADDR (execp);
569 obj_datasec (abfd)->vma = N_DATADDR (execp);
570 obj_bsssec (abfd)->vma = N_BSSADDR (execp);
572 /* The file offsets of the sections. */
573 obj_textsec (abfd)->filepos = N_TXTOFF (execp);
574 obj_datasec (abfd)->filepos = N_DATOFF (execp);
576 /* The file offsets of the relocation info. */
577 obj_textsec (abfd)->rel_filepos = N_TRELOFF (execp);
578 obj_datasec (abfd)->rel_filepos = N_DRELOFF (execp);
580 /* The file offsets of the string table and symbol table. */
581 obj_str_filepos (abfd) = N_STROFF (execp);
582 obj_sym_filepos (abfd) = N_SYMOFF (execp);
584 /* Determine the architecture and machine type of the object file. */
585 switch (N_MACHTYPE (exec_hdr (abfd)))
588 abfd->obj_arch = bfd_arch_obscure;
592 adata (abfd)->page_size = TARGET_PAGE_SIZE;
593 adata (abfd)->segment_size = SEGMENT_SIZE;
594 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
598 /* The architecture is encoded in various ways in various a.out variants,
599 or is not encoded at all in some of them. The relocation size depends
600 on the architecture and the a.out variant. Finally, the return value
601 is the bfd_target vector in use. If an error occurs, return zero and
602 set bfd_error to the appropriate error code.
604 Formats such as b.out, which have additional fields in the a.out
605 header, should cope with them in this callback as well. */
606 #endif /* DOCUMENTATION */
608 result = (*callback_to_real_object_p) (abfd);
610 /* Now that the segment addresses have been worked out, take a better
611 guess at whether the file is executable. If the entry point
612 is within the text segment, assume it is. (This makes files
613 executable even if their entry point address is 0, as long as
614 their text starts at zero.).
616 This test had to be changed to deal with systems where the text segment
617 runs at a different location than the default. The problem is that the
618 entry address can appear to be outside the text segment, thus causing an
619 erroneous conclusion that the file isn't executable.
621 To fix this, we now accept any non-zero entry point as an indication of
622 executability. This will work most of the time, since only the linker
623 sets the entry point, and that is likely to be non-zero for most systems. */
625 if (execp->a_entry != 0
626 || (execp->a_entry >= obj_textsec (abfd)->vma
627 && execp->a_entry < (obj_textsec (abfd)->vma
628 + obj_textsec (abfd)->size)
629 && execp->a_trsize == 0
630 && execp->a_drsize == 0))
631 abfd->flags |= EXEC_P;
635 struct stat stat_buf;
637 /* The original heuristic doesn't work in some important cases.
638 The a.out file has no information about the text start
639 address. For files (like kernels) linked to non-standard
640 addresses (ld -Ttext nnn) the entry point may not be between
641 the default text start (obj_textsec(abfd)->vma) and
642 (obj_textsec(abfd)->vma) + text size. This is not just a mach
643 issue. Many kernels are loaded at non standard addresses. */
644 if (abfd->iostream != NULL
645 && (abfd->flags & BFD_IN_MEMORY) == 0
646 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
647 && ((stat_buf.st_mode & 0111) != 0))
648 abfd->flags |= EXEC_P;
650 #endif /* STAT_FOR_EXEC */
656 bfd_release (abfd, rawptr);
657 abfd->tdata.aout_data = oldrawptr;
663 aout_@var{size}_mkobject
666 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
669 Initialize BFD @var{abfd} for use with a.out files.
673 NAME (aout, mkobject) (bfd *abfd)
675 struct aout_data_struct *rawptr;
676 bfd_size_type amt = sizeof (* rawptr);
678 bfd_set_error (bfd_error_system_call);
680 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
684 abfd->tdata.aout_data = rawptr;
685 exec_hdr (abfd) = &(rawptr->e);
687 obj_textsec (abfd) = NULL;
688 obj_datasec (abfd) = NULL;
689 obj_bsssec (abfd) = NULL;
696 aout_@var{size}_machine_type
699 enum machine_type aout_@var{size}_machine_type
700 (enum bfd_architecture arch,
701 unsigned long machine,
702 bfd_boolean *unknown);
705 Keep track of machine architecture and machine type for
706 a.out's. Return the <<machine_type>> for a particular
707 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
708 and machine can't be represented in a.out format.
710 If the architecture is understood, machine type 0 (default)
711 is always understood.
715 NAME (aout, machine_type) (enum bfd_architecture arch,
716 unsigned long machine,
717 bfd_boolean *unknown)
719 enum machine_type arch_flags;
721 arch_flags = M_UNKNOWN;
728 || machine == bfd_mach_sparc
729 || machine == bfd_mach_sparc_sparclite
730 || machine == bfd_mach_sparc_sparclite_le
731 || machine == bfd_mach_sparc_v8plus
732 || machine == bfd_mach_sparc_v8plusa
733 || machine == bfd_mach_sparc_v8plusb
734 || machine == bfd_mach_sparc_v8plusc
735 || machine == bfd_mach_sparc_v8plusd
736 || machine == bfd_mach_sparc_v8pluse
737 || machine == bfd_mach_sparc_v8plusv
738 || machine == bfd_mach_sparc_v8plusm
739 || machine == bfd_mach_sparc_v8plusm8
740 || machine == bfd_mach_sparc_v9
741 || machine == bfd_mach_sparc_v9a
742 || machine == bfd_mach_sparc_v9b
743 || machine == bfd_mach_sparc_v9c
744 || machine == bfd_mach_sparc_v9d
745 || machine == bfd_mach_sparc_v9e
746 || machine == bfd_mach_sparc_v9v
747 || machine == bfd_mach_sparc_v9m
748 || machine == bfd_mach_sparc_v9m8)
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 (_("%pB: can not represent section `%pA' in a.out object file format"),
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);
1352 if (stringsize == 0)
1354 else if (stringsize < BYTES_IN_WORD
1355 || (size_t) stringsize != stringsize)
1357 bfd_set_error (bfd_error_bad_value);
1362 if (stringsize >= BYTES_IN_WORD)
1364 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1365 &obj_aout_string_window (abfd), TRUE))
1367 strings = (char *) obj_aout_string_window (abfd).data;
1372 strings = (char *) bfd_malloc (stringsize);
1373 if (strings == NULL)
1376 if (stringsize >= BYTES_IN_WORD)
1378 /* Keep the string count in the buffer for convenience
1379 when indexing with e_strx. */
1380 amt = stringsize - BYTES_IN_WORD;
1381 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1388 /* Ensure that a zero index yields an empty string. */
1391 strings[stringsize - 1] = 0;
1393 obj_aout_external_strings (abfd) = strings;
1394 obj_aout_external_string_size (abfd) = stringsize;
1400 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1401 and symbol->value fields of CACHE_PTR will be set from the a.out
1402 nlist structure. This function is responsible for setting
1403 symbol->flags and symbol->section, and adjusting symbol->value. */
1406 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1410 if ((cache_ptr->type & N_STAB) != 0
1411 || cache_ptr->type == N_FN)
1415 /* This is a debugging symbol. */
1416 cache_ptr->symbol.flags = BSF_DEBUGGING;
1418 /* Work out the symbol section. */
1419 switch (cache_ptr->type & N_TYPE)
1423 sec = obj_textsec (abfd);
1426 sec = obj_datasec (abfd);
1429 sec = obj_bsssec (abfd);
1433 sec = bfd_abs_section_ptr;
1437 cache_ptr->symbol.section = sec;
1438 cache_ptr->symbol.value -= sec->vma;
1443 /* Get the default visibility. This does not apply to all types, so
1444 we just hold it in a local variable to use if wanted. */
1445 if ((cache_ptr->type & N_EXT) == 0)
1446 visible = BSF_LOCAL;
1448 visible = BSF_GLOBAL;
1450 switch (cache_ptr->type)
1453 case N_ABS: case N_ABS | N_EXT:
1454 cache_ptr->symbol.section = bfd_abs_section_ptr;
1455 cache_ptr->symbol.flags = visible;
1458 case N_UNDF | N_EXT:
1459 if (cache_ptr->symbol.value != 0)
1461 /* This is a common symbol. */
1462 cache_ptr->symbol.flags = BSF_GLOBAL;
1463 cache_ptr->symbol.section = bfd_com_section_ptr;
1467 cache_ptr->symbol.flags = 0;
1468 cache_ptr->symbol.section = bfd_und_section_ptr;
1472 case N_TEXT: case N_TEXT | N_EXT:
1473 cache_ptr->symbol.section = obj_textsec (abfd);
1474 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1475 cache_ptr->symbol.flags = visible;
1478 /* N_SETV symbols used to represent set vectors placed in the
1479 data section. They are no longer generated. Theoretically,
1480 it was possible to extract the entries and combine them with
1481 new ones, although I don't know if that was ever actually
1482 done. Unless that feature is restored, treat them as data
1484 case N_SETV: case N_SETV | N_EXT:
1485 case N_DATA: case N_DATA | N_EXT:
1486 cache_ptr->symbol.section = obj_datasec (abfd);
1487 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1488 cache_ptr->symbol.flags = visible;
1491 case N_BSS: case N_BSS | N_EXT:
1492 cache_ptr->symbol.section = obj_bsssec (abfd);
1493 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1494 cache_ptr->symbol.flags = visible;
1497 case N_SETA: case N_SETA | N_EXT:
1498 case N_SETT: case N_SETT | N_EXT:
1499 case N_SETD: case N_SETD | N_EXT:
1500 case N_SETB: case N_SETB | N_EXT:
1502 /* This code is no longer needed. It used to be used to make
1503 the linker handle set symbols, but they are now handled in
1504 the add_symbols routine instead. */
1505 switch (cache_ptr->type & N_TYPE)
1508 cache_ptr->symbol.section = bfd_abs_section_ptr;
1511 cache_ptr->symbol.section = obj_textsec (abfd);
1514 cache_ptr->symbol.section = obj_datasec (abfd);
1517 cache_ptr->symbol.section = obj_bsssec (abfd);
1521 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1526 /* This symbol is the text of a warning message. The next
1527 symbol is the symbol to associate the warning with. If a
1528 reference is made to that symbol, a warning is issued. */
1529 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1530 cache_ptr->symbol.section = bfd_abs_section_ptr;
1533 case N_INDR: case N_INDR | N_EXT:
1534 /* An indirect symbol. This consists of two symbols in a row.
1535 The first symbol is the name of the indirection. The second
1536 symbol is the name of the target. A reference to the first
1537 symbol becomes a reference to the second. */
1538 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1539 cache_ptr->symbol.section = bfd_ind_section_ptr;
1543 cache_ptr->symbol.section = bfd_und_section_ptr;
1544 cache_ptr->symbol.flags = BSF_WEAK;
1548 cache_ptr->symbol.section = bfd_abs_section_ptr;
1549 cache_ptr->symbol.flags = BSF_WEAK;
1553 cache_ptr->symbol.section = obj_textsec (abfd);
1554 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1555 cache_ptr->symbol.flags = BSF_WEAK;
1559 cache_ptr->symbol.section = obj_datasec (abfd);
1560 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1561 cache_ptr->symbol.flags = BSF_WEAK;
1565 cache_ptr->symbol.section = obj_bsssec (abfd);
1566 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1567 cache_ptr->symbol.flags = BSF_WEAK;
1574 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1577 translate_to_native_sym_flags (bfd *abfd,
1579 struct external_nlist *sym_pointer)
1581 bfd_vma value = cache_ptr->value;
1585 /* Mask out any existing type bits in case copying from one section
1587 sym_pointer->e_type[0] &= ~N_TYPE;
1589 sec = bfd_get_section (cache_ptr);
1594 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1597 /* xgettext:c-format */
1598 (_("%pB: can not represent section for symbol `%s' in a.out "
1599 "object file format"),
1601 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1602 bfd_set_error (bfd_error_nonrepresentable_section);
1606 if (sec->output_section != NULL)
1608 off = sec->output_offset;
1609 sec = sec->output_section;
1612 if (bfd_is_abs_section (sec))
1613 sym_pointer->e_type[0] |= N_ABS;
1614 else if (sec == obj_textsec (abfd))
1615 sym_pointer->e_type[0] |= N_TEXT;
1616 else if (sec == obj_datasec (abfd))
1617 sym_pointer->e_type[0] |= N_DATA;
1618 else if (sec == obj_bsssec (abfd))
1619 sym_pointer->e_type[0] |= N_BSS;
1620 else if (bfd_is_und_section (sec))
1621 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1622 else if (bfd_is_ind_section (sec))
1623 sym_pointer->e_type[0] = N_INDR;
1624 else if (bfd_is_com_section (sec))
1625 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1628 if (aout_section_merge_with_text_p (abfd, sec))
1629 sym_pointer->e_type[0] |= N_TEXT;
1633 /* xgettext:c-format */
1634 (_("%pB: can not represent section `%pA' in a.out object file format"),
1636 bfd_set_error (bfd_error_nonrepresentable_section);
1641 /* Turn the symbol from section relative to absolute again. */
1642 value += sec->vma + off;
1644 if ((cache_ptr->flags & BSF_WARNING) != 0)
1645 sym_pointer->e_type[0] = N_WARNING;
1647 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1648 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1649 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1650 sym_pointer->e_type[0] |= N_EXT;
1651 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1652 sym_pointer->e_type[0] &= ~N_EXT;
1654 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1656 int type = ((aout_symbol_type *) cache_ptr)->type;
1660 case N_ABS: type = N_SETA; break;
1661 case N_TEXT: type = N_SETT; break;
1662 case N_DATA: type = N_SETD; break;
1663 case N_BSS: type = N_SETB; break;
1665 sym_pointer->e_type[0] = type;
1668 if ((cache_ptr->flags & BSF_WEAK) != 0)
1672 switch (sym_pointer->e_type[0] & N_TYPE)
1675 case N_ABS: type = N_WEAKA; break;
1676 case N_TEXT: type = N_WEAKT; break;
1677 case N_DATA: type = N_WEAKD; break;
1678 case N_BSS: type = N_WEAKB; break;
1679 case N_UNDF: type = N_WEAKU; break;
1681 sym_pointer->e_type[0] = type;
1684 PUT_WORD (abfd, value, sym_pointer->e_value);
1689 /* Native-level interface to symbols. */
1692 NAME (aout, make_empty_symbol) (bfd *abfd)
1694 bfd_size_type amt = sizeof (aout_symbol_type);
1696 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt);
1699 new_symbol->symbol.the_bfd = abfd;
1701 return &new_symbol->symbol;
1704 /* Translate a set of internal symbols into external symbols. */
1707 NAME (aout, translate_symbol_table) (bfd *abfd,
1708 aout_symbol_type *in,
1709 struct external_nlist *ext,
1710 bfd_size_type count,
1712 bfd_size_type strsize,
1713 bfd_boolean dynamic)
1715 struct external_nlist *ext_end;
1717 ext_end = ext + count;
1718 for (; ext < ext_end; ext++, in++)
1722 x = GET_WORD (abfd, ext->e_strx);
1723 in->symbol.the_bfd = abfd;
1725 /* For the normal symbols, the zero index points at the number
1726 of bytes in the string table but is to be interpreted as the
1727 null string. For the dynamic symbols, the number of bytes in
1728 the string table is stored in the __DYNAMIC structure and the
1729 zero index points at an actual string. */
1730 if (x == 0 && ! dynamic)
1731 in->symbol.name = "";
1732 else if (x < strsize)
1733 in->symbol.name = str + x;
1737 (_("%pB: invalid string offset %" PRIu64 " >= %" PRIu64),
1738 abfd, (uint64_t) x, (uint64_t) strsize);
1739 bfd_set_error (bfd_error_bad_value);
1743 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1744 in->desc = H_GET_16 (abfd, ext->e_desc);
1745 in->other = H_GET_8 (abfd, ext->e_other);
1746 in->type = H_GET_8 (abfd, ext->e_type);
1747 in->symbol.udata.p = NULL;
1749 if (! translate_from_native_sym_flags (abfd, in))
1753 in->symbol.flags |= BSF_DYNAMIC;
1759 /* We read the symbols into a buffer, which is discarded when this
1760 function exits. We read the strings into a buffer large enough to
1761 hold them all plus all the cached symbol entries. */
1764 NAME (aout, slurp_symbol_table) (bfd *abfd)
1766 struct external_nlist *old_external_syms;
1767 aout_symbol_type *cached;
1768 bfd_size_type cached_size;
1770 /* If there's no work to be done, don't do any. */
1771 if (obj_aout_symbols (abfd) != NULL)
1774 old_external_syms = obj_aout_external_syms (abfd);
1776 if (! aout_get_external_symbols (abfd))
1779 cached_size = obj_aout_external_sym_count (abfd);
1780 if (cached_size == 0)
1781 return TRUE; /* Nothing to do. */
1783 cached_size *= sizeof (aout_symbol_type);
1784 cached = (aout_symbol_type *) bfd_zmalloc (cached_size);
1788 /* Convert from external symbol information to internal. */
1789 if (! (NAME (aout, translate_symbol_table)
1791 obj_aout_external_syms (abfd),
1792 obj_aout_external_sym_count (abfd),
1793 obj_aout_external_strings (abfd),
1794 obj_aout_external_string_size (abfd),
1801 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1803 obj_aout_symbols (abfd) = cached;
1805 /* It is very likely that anybody who calls this function will not
1806 want the external symbol information, so if it was allocated
1807 because of our call to aout_get_external_symbols, we free it up
1808 right away to save space. */
1809 if (old_external_syms == NULL
1810 && obj_aout_external_syms (abfd) != NULL)
1813 bfd_free_window (&obj_aout_sym_window (abfd));
1815 free (obj_aout_external_syms (abfd));
1817 obj_aout_external_syms (abfd) = NULL;
1823 /* We use a hash table when writing out symbols so that we only write
1824 out a particular string once. This helps particularly when the
1825 linker writes out stabs debugging entries, because each different
1826 contributing object file tends to have many duplicate stabs
1829 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1830 if BFD_TRADITIONAL_FORMAT is set. */
1832 /* Get the index of a string in a strtab, adding it if it is not
1835 static inline bfd_size_type
1836 add_to_stringtab (bfd *abfd,
1837 struct bfd_strtab_hash *tab,
1842 bfd_size_type str_index;
1844 /* An index of 0 always means the empty string. */
1845 if (str == 0 || *str == '\0')
1848 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1849 doesn't understand a hashed string table. */
1851 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1854 str_index = _bfd_stringtab_add (tab, str, hash, copy);
1856 if (str_index != (bfd_size_type) -1)
1857 /* Add BYTES_IN_WORD to the return value to account for the
1858 space taken up by the string table size. */
1859 str_index += BYTES_IN_WORD;
1864 /* Write out a strtab. ABFD is already at the right location in the
1868 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1870 bfd_byte buffer[BYTES_IN_WORD];
1871 bfd_size_type amt = BYTES_IN_WORD;
1873 /* The string table starts with the size. */
1874 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1875 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1878 return _bfd_stringtab_emit (abfd, tab);
1882 NAME (aout, write_syms) (bfd *abfd)
1884 unsigned int count ;
1885 asymbol **generic = bfd_get_outsymbols (abfd);
1886 struct bfd_strtab_hash *strtab;
1888 strtab = _bfd_stringtab_init ();
1892 for (count = 0; count < bfd_get_symcount (abfd); count++)
1894 asymbol *g = generic[count];
1896 struct external_nlist nsp;
1899 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1900 if (indx == (bfd_size_type) -1)
1902 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1904 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1906 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1907 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1908 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1912 H_PUT_16 (abfd, 0, nsp.e_desc);
1913 H_PUT_8 (abfd, 0, nsp.e_other);
1914 H_PUT_8 (abfd, 0, nsp.e_type);
1917 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1920 amt = EXTERNAL_NLIST_SIZE;
1921 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1924 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1925 here, at the end. */
1929 if (! emit_stringtab (abfd, strtab))
1932 _bfd_stringtab_free (strtab);
1937 _bfd_stringtab_free (strtab);
1942 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1944 unsigned int counter = 0;
1945 aout_symbol_type *symbase;
1947 if (!NAME (aout, slurp_symbol_table) (abfd))
1950 for (symbase = obj_aout_symbols (abfd);
1951 counter++ < bfd_get_symcount (abfd);
1953 *(location++) = (asymbol *) (symbase++);
1955 return bfd_get_symcount (abfd);
1958 /* Standard reloc stuff. */
1959 /* Output standard relocation information to a file in target byte order. */
1961 extern void NAME (aout, swap_std_reloc_out)
1962 (bfd *, arelent *, struct reloc_std_external *);
1965 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1967 struct reloc_std_external *natptr)
1970 asymbol *sym = *(g->sym_ptr_ptr);
1972 unsigned int r_length;
1974 int r_baserel, r_jmptable, r_relative;
1975 asection *output_section = sym->section->output_section;
1977 PUT_WORD (abfd, g->address, natptr->r_address);
1979 BFD_ASSERT (g->howto != NULL);
1980 r_length = g->howto->size ; /* Size as a power of two. */
1981 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1982 /* XXX This relies on relocs coming from a.out files. */
1983 r_baserel = (g->howto->type & 8) != 0;
1984 r_jmptable = (g->howto->type & 16) != 0;
1985 r_relative = (g->howto->type & 32) != 0;
1987 /* Name was clobbered by aout_write_syms to be symbol index. */
1989 /* If this relocation is relative to a symbol then set the
1990 r_index to the symbols index, and the r_extern bit.
1992 Absolute symbols can come in in two ways, either as an offset
1993 from the abs section, or as a symbol which has an abs value.
1994 check for that here. */
1996 if (bfd_is_com_section (output_section)
1997 || bfd_is_abs_section (output_section)
1998 || bfd_is_und_section (output_section)
1999 /* PR gas/3041 a.out relocs against weak symbols
2000 must be treated as if they were against externs. */
2001 || (sym->flags & BSF_WEAK))
2003 if (bfd_abs_section_ptr->symbol == sym)
2005 /* Whoops, looked like an abs symbol, but is
2006 really an offset from the abs section. */
2012 /* Fill in symbol. */
2014 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2019 /* Just an ordinary section. */
2021 r_index = output_section->target_index;
2024 /* Now the fun stuff. */
2025 if (bfd_header_big_endian (abfd))
2027 natptr->r_index[0] = r_index >> 16;
2028 natptr->r_index[1] = r_index >> 8;
2029 natptr->r_index[2] = r_index;
2030 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
2031 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
2032 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
2033 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
2034 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
2035 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2039 natptr->r_index[2] = r_index >> 16;
2040 natptr->r_index[1] = r_index >> 8;
2041 natptr->r_index[0] = r_index;
2042 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2043 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2044 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2045 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2046 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2047 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2051 /* Extended stuff. */
2052 /* Output extended relocation information to a file in target byte order. */
2054 extern void NAME (aout, swap_ext_reloc_out)
2055 (bfd *, arelent *, struct reloc_ext_external *);
2058 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2060 struct reloc_ext_external *natptr)
2064 unsigned int r_type;
2066 asymbol *sym = *(g->sym_ptr_ptr);
2067 asection *output_section = sym->section->output_section;
2069 PUT_WORD (abfd, g->address, natptr->r_address);
2071 r_type = (unsigned int) g->howto->type;
2073 r_addend = g->addend;
2074 if ((sym->flags & BSF_SECTION_SYM) != 0)
2075 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2077 /* If this relocation is relative to a symbol then set the
2078 r_index to the symbols index, and the r_extern bit.
2080 Absolute symbols can come in in two ways, either as an offset
2081 from the abs section, or as a symbol which has an abs value.
2082 check for that here. */
2083 if (bfd_is_abs_section (bfd_get_section (sym)))
2088 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2090 if (bfd_is_und_section (bfd_get_section (sym))
2091 || (sym->flags & BSF_GLOBAL) != 0)
2095 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2099 /* Just an ordinary section. */
2101 r_index = output_section->target_index;
2104 /* Now the fun stuff. */
2105 if (bfd_header_big_endian (abfd))
2107 natptr->r_index[0] = r_index >> 16;
2108 natptr->r_index[1] = r_index >> 8;
2109 natptr->r_index[2] = r_index;
2110 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2111 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2115 natptr->r_index[2] = r_index >> 16;
2116 natptr->r_index[1] = r_index >> 8;
2117 natptr->r_index[0] = r_index;
2118 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2119 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2122 PUT_WORD (abfd, r_addend, natptr->r_addend);
2125 /* BFD deals internally with all things based from the section they're
2126 in. so, something in 10 bytes into a text section with a base of
2127 50 would have a symbol (.text+10) and know .text vma was 50.
2129 Aout keeps all it's symbols based from zero, so the symbol would
2130 contain 60. This macro subs the base of each section from the value
2131 to give the true offset from the section. */
2133 #define MOVE_ADDRESS(ad) \
2136 /* Undefined symbol. */ \
2137 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2138 cache_ptr->addend = ad; \
2142 /* Defined, section relative. Replace symbol with pointer to \
2143 symbol which points to section. */ \
2147 case N_TEXT | N_EXT: \
2148 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2149 cache_ptr->addend = ad - su->textsec->vma; \
2152 case N_DATA | N_EXT: \
2153 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2154 cache_ptr->addend = ad - su->datasec->vma; \
2157 case N_BSS | N_EXT: \
2158 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2159 cache_ptr->addend = ad - su->bsssec->vma; \
2163 case N_ABS | N_EXT: \
2164 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2165 cache_ptr->addend = ad; \
2171 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2172 struct reloc_ext_external *bytes,
2175 bfd_size_type symcount)
2177 unsigned int r_index;
2179 unsigned int r_type;
2180 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2182 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2184 /* Now the fun stuff. */
2185 if (bfd_header_big_endian (abfd))
2187 r_index = (((unsigned int) bytes->r_index[0] << 16)
2188 | ((unsigned int) bytes->r_index[1] << 8)
2189 | bytes->r_index[2]);
2190 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2191 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2192 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2196 r_index = (((unsigned int) bytes->r_index[2] << 16)
2197 | ((unsigned int) bytes->r_index[1] << 8)
2198 | bytes->r_index[0]);
2199 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2200 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2201 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2204 if (r_type < TABLE_SIZE (howto_table_ext))
2205 cache_ptr->howto = howto_table_ext + r_type;
2207 cache_ptr->howto = NULL;
2209 /* Base relative relocs are always against the symbol table,
2210 regardless of the setting of r_extern. r_extern just reflects
2211 whether the symbol the reloc is against is local or global. */
2212 if (r_type == (unsigned int) RELOC_BASE10
2213 || r_type == (unsigned int) RELOC_BASE13
2214 || r_type == (unsigned int) RELOC_BASE22)
2217 if (r_extern && r_index > symcount)
2219 /* We could arrange to return an error, but it might be useful
2220 to see the file even if it is bad. */
2225 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2229 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2230 struct reloc_std_external *bytes,
2233 bfd_size_type symcount)
2235 unsigned int r_index;
2237 unsigned int r_length;
2239 int r_baserel, r_jmptable, r_relative;
2240 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2241 unsigned int howto_idx;
2243 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2245 /* Now the fun stuff. */
2246 if (bfd_header_big_endian (abfd))
2248 r_index = (((unsigned int) bytes->r_index[0] << 16)
2249 | ((unsigned int) bytes->r_index[1] << 8)
2250 | bytes->r_index[2]);
2251 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2252 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2253 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2254 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2255 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2256 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2257 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2261 r_index = (((unsigned int) bytes->r_index[2] << 16)
2262 | ((unsigned int) bytes->r_index[1] << 8)
2263 | bytes->r_index[0]);
2264 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2265 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2266 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2267 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2268 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2269 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2270 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2273 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2274 + 16 * r_jmptable + 32 * r_relative);
2275 if (howto_idx < TABLE_SIZE (howto_table_std))
2277 cache_ptr->howto = howto_table_std + howto_idx;
2278 if (cache_ptr->howto->type == (unsigned int) -1)
2279 cache_ptr->howto = NULL;
2282 cache_ptr->howto = NULL;
2284 /* Base relative relocs are always against the symbol table,
2285 regardless of the setting of r_extern. r_extern just reflects
2286 whether the symbol the reloc is against is local or global. */
2290 if (r_extern && r_index >= symcount)
2292 /* We could arrange to return an error, but it might be useful
2293 to see the file even if it is bad. FIXME: Of course this
2294 means that objdump -r *doesn't* see the actual reloc, and
2295 objcopy silently writes a different reloc. */
2303 /* Read and swap the relocs for a section. */
2306 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2308 bfd_size_type count;
2309 bfd_size_type reloc_size;
2311 arelent *reloc_cache;
2313 unsigned int counter = 0;
2317 if (asect->relocation)
2320 if (asect->flags & SEC_CONSTRUCTOR)
2323 if (asect == obj_datasec (abfd))
2324 reloc_size = exec_hdr (abfd)->a_drsize;
2325 else if (asect == obj_textsec (abfd))
2326 reloc_size = exec_hdr (abfd)->a_trsize;
2327 else if (asect == obj_bsssec (abfd))
2331 bfd_set_error (bfd_error_invalid_operation);
2335 if (reloc_size == 0)
2336 return TRUE; /* Nothing to be done. */
2338 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2341 each_size = obj_reloc_entry_size (abfd);
2343 count = reloc_size / each_size;
2345 return TRUE; /* Nothing to be done. */
2347 amt = count * sizeof (arelent);
2348 reloc_cache = (arelent *) bfd_zmalloc (amt);
2349 if (reloc_cache == NULL)
2352 relocs = bfd_malloc (reloc_size);
2359 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2366 cache_ptr = reloc_cache;
2367 if (each_size == RELOC_EXT_SIZE)
2369 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2371 for (; counter < count; counter++, rptr++, cache_ptr++)
2372 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2373 (bfd_size_type) bfd_get_symcount (abfd));
2377 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2379 for (; counter < count; counter++, rptr++, cache_ptr++)
2380 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2381 (bfd_size_type) bfd_get_symcount (abfd));
2386 asect->relocation = reloc_cache;
2387 asect->reloc_count = cache_ptr - reloc_cache;
2392 /* Write out a relocation section into an object file. */
2395 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2398 unsigned char *native, *natptr;
2401 unsigned int count = section->reloc_count;
2402 bfd_size_type natsize;
2404 if (count == 0 || section->orelocation == NULL)
2407 each_size = obj_reloc_entry_size (abfd);
2408 natsize = (bfd_size_type) each_size * count;
2409 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2413 generic = section->orelocation;
2415 if (each_size == RELOC_EXT_SIZE)
2417 for (natptr = native;
2419 --count, natptr += each_size, ++generic)
2421 /* PR 20921: If the howto field has not been initialised then skip
2423 PR 20929: Similarly for the symbol field. */
2424 if ((*generic)->howto == NULL
2425 || (*generic)->sym_ptr_ptr == NULL)
2427 bfd_set_error (bfd_error_invalid_operation);
2428 _bfd_error_handler (_("\
2429 %pB: attempt to write out unknown reloc type"), abfd);
2432 MY_swap_ext_reloc_out (abfd, *generic,
2433 (struct reloc_ext_external *) natptr);
2438 for (natptr = native;
2440 --count, natptr += each_size, ++generic)
2442 if ((*generic)->howto == NULL
2443 || (*generic)->sym_ptr_ptr == NULL)
2445 bfd_set_error (bfd_error_invalid_operation);
2446 _bfd_error_handler (_("\
2447 %pB: attempt to write out unknown reloc type"), abfd);
2450 MY_swap_std_reloc_out (abfd, *generic,
2451 (struct reloc_std_external *) natptr);
2455 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2457 bfd_release (abfd, native);
2460 bfd_release (abfd, native);
2465 /* This is stupid. This function should be a boolean predicate. */
2468 NAME (aout, canonicalize_reloc) (bfd *abfd,
2473 arelent *tblptr = section->relocation;
2476 if (section == obj_bsssec (abfd))
2482 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2485 if (section->flags & SEC_CONSTRUCTOR)
2487 arelent_chain *chain = section->constructor_chain;
2488 for (count = 0; count < section->reloc_count; count ++)
2490 *relptr ++ = &chain->relent;
2491 chain = chain->next;
2496 tblptr = section->relocation;
2498 for (count = 0; count++ < section->reloc_count; )
2500 *relptr++ = tblptr++;
2505 return section->reloc_count;
2509 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2511 if (bfd_get_format (abfd) != bfd_object)
2513 bfd_set_error (bfd_error_invalid_operation);
2517 if (asect->flags & SEC_CONSTRUCTOR)
2518 return sizeof (arelent *) * (asect->reloc_count + 1);
2520 if (asect == obj_datasec (abfd))
2521 return sizeof (arelent *)
2522 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2525 if (asect == obj_textsec (abfd))
2526 return sizeof (arelent *)
2527 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2530 if (asect == obj_bsssec (abfd))
2531 return sizeof (arelent *);
2533 if (asect == obj_bsssec (abfd))
2536 bfd_set_error (bfd_error_invalid_operation);
2541 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2543 if (!NAME (aout, slurp_symbol_table) (abfd))
2546 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2550 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2551 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2557 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2561 bfd_symbol_info (symbol, ret);
2563 if (ret->type == '?')
2565 int type_code = aout_symbol (symbol)->type & 0xff;
2566 const char *stab_name = bfd_get_stab_name (type_code);
2567 static char buf[10];
2569 if (stab_name == NULL)
2571 sprintf (buf, "(%d)", type_code);
2575 ret->stab_type = type_code;
2576 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2577 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2578 ret->stab_name = stab_name;
2583 NAME (aout, print_symbol) (bfd *abfd,
2586 bfd_print_symbol_type how)
2588 FILE *file = (FILE *)afile;
2592 case bfd_print_symbol_name:
2594 fprintf (file,"%s", symbol->name);
2596 case bfd_print_symbol_more:
2597 fprintf (file,"%4x %2x %2x",
2598 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2599 (unsigned) (aout_symbol (symbol)->other & 0xff),
2600 (unsigned) (aout_symbol (symbol)->type));
2602 case bfd_print_symbol_all:
2604 const char *section_name = symbol->section->name;
2606 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2608 fprintf (file," %-5s %04x %02x %02x",
2610 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2611 (unsigned) (aout_symbol (symbol)->other & 0xff),
2612 (unsigned) (aout_symbol (symbol)->type & 0xff));
2614 fprintf (file," %s", symbol->name);
2620 /* If we don't have to allocate more than 1MB to hold the generic
2621 symbols, we use the generic minisymbol methord: it's faster, since
2622 it only translates the symbols once, not multiple times. */
2623 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2625 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2626 symbols. The minisymbol_to_symbol function translates these into
2627 BFD asymbol structures. */
2630 NAME (aout, read_minisymbols) (bfd *abfd,
2631 bfd_boolean dynamic,
2633 unsigned int *sizep)
2636 /* We could handle the dynamic symbols here as well, but it's
2637 easier to hand them off. */
2638 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2640 if (! aout_get_external_symbols (abfd))
2643 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2644 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2646 *minisymsp = (void *) obj_aout_external_syms (abfd);
2648 /* By passing the external symbols back from this routine, we are
2649 giving up control over the memory block. Clear
2650 obj_aout_external_syms, so that we do not try to free it
2652 obj_aout_external_syms (abfd) = NULL;
2654 *sizep = EXTERNAL_NLIST_SIZE;
2655 return obj_aout_external_sym_count (abfd);
2658 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2659 unmodified a.out symbol. The SYM argument is a structure returned
2660 by bfd_make_empty_symbol, which we fill in here. */
2663 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2664 bfd_boolean dynamic,
2665 const void * minisym,
2669 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2670 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2672 memset (sym, 0, sizeof (aout_symbol_type));
2674 /* We call translate_symbol_table to translate a single symbol. */
2675 if (! (NAME (aout, translate_symbol_table)
2677 (aout_symbol_type *) sym,
2678 (struct external_nlist *) minisym,
2680 obj_aout_external_strings (abfd),
2681 obj_aout_external_string_size (abfd),
2688 /* Provided a BFD, a section and an offset into the section, calculate
2689 and return the name of the source file and the line nearest to the
2693 NAME (aout, find_nearest_line) (bfd *abfd,
2697 const char **filename_ptr,
2698 const char **functionname_ptr,
2699 unsigned int *line_ptr,
2700 unsigned int *disriminator_ptr)
2702 /* Run down the file looking for the filename, function and linenumber. */
2704 const char *directory_name = NULL;
2705 const char *main_file_name = NULL;
2706 const char *current_file_name = NULL;
2707 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2708 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2709 bfd_vma low_line_vma = 0;
2710 bfd_vma low_func_vma = 0;
2712 bfd_size_type filelen, funclen;
2715 *filename_ptr = abfd->filename;
2716 *functionname_ptr = NULL;
2718 if (disriminator_ptr)
2719 *disriminator_ptr = 0;
2721 if (symbols != NULL)
2723 for (p = symbols; *p; p++)
2725 aout_symbol_type *q = (aout_symbol_type *) (*p);
2730 /* If this looks like a file name symbol, and it comes after
2731 the line number we have found so far, but before the
2732 offset, then we have probably not found the right line
2734 if (q->symbol.value <= offset
2735 && ((q->symbol.value > low_line_vma
2736 && (line_file_name != NULL
2738 || (q->symbol.value > low_func_vma
2741 const char *symname;
2743 symname = q->symbol.name;
2744 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2746 if (q->symbol.value > low_line_vma)
2749 line_file_name = NULL;
2751 if (q->symbol.value > low_func_vma)
2758 /* If this symbol is less than the offset, but greater than
2759 the line number we have found so far, then we have not
2760 found the right line number. */
2761 if (q->symbol.value <= offset)
2763 if (q->symbol.value > low_line_vma)
2766 line_file_name = NULL;
2768 if (q->symbol.value > low_func_vma)
2772 main_file_name = current_file_name = q->symbol.name;
2773 /* Look ahead to next symbol to check if that too is an N_SO. */
2777 q = (aout_symbol_type *) (*p);
2778 if (q->type != (int)N_SO)
2781 /* Found a second N_SO First is directory; second is filename. */
2782 directory_name = current_file_name;
2783 main_file_name = current_file_name = q->symbol.name;
2784 if (obj_textsec (abfd) != section)
2788 current_file_name = q->symbol.name;
2795 /* We'll keep this if it resolves nearer than the one we have
2797 if (q->symbol.value >= low_line_vma
2798 && q->symbol.value <= offset)
2800 *line_ptr = q->desc;
2801 low_line_vma = q->symbol.value;
2802 line_file_name = current_file_name;
2803 line_directory_name = directory_name;
2808 /* We'll keep this if it is nearer than the one we have already. */
2809 if (q->symbol.value >= low_func_vma &&
2810 q->symbol.value <= offset)
2812 low_func_vma = q->symbol.value;
2813 func = (asymbol *)q;
2815 else if (q->symbol.value > offset)
2826 main_file_name = line_file_name;
2827 directory_name = line_directory_name;
2830 if (main_file_name == NULL
2831 || IS_ABSOLUTE_PATH (main_file_name)
2832 || directory_name == NULL)
2835 filelen = strlen (directory_name) + strlen (main_file_name);
2840 funclen = strlen (bfd_asymbol_name (func));
2842 if (adata (abfd).line_buf != NULL)
2843 free (adata (abfd).line_buf);
2845 if (filelen + funclen == 0)
2846 adata (abfd).line_buf = buf = NULL;
2849 buf = (char *) bfd_malloc (filelen + funclen + 3);
2850 adata (abfd).line_buf = buf;
2855 if (main_file_name != NULL)
2857 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2858 *filename_ptr = main_file_name;
2862 /* PR binutils/20891: In a corrupt input file both
2863 main_file_name and directory_name can be empty... */
2864 * filename_ptr = NULL;
2867 snprintf (buf, filelen + 1, "%s%s", directory_name,
2869 *filename_ptr = buf;
2877 const char *function = func->name;
2882 /* PR binutils/20892: In a corrupt input file func can be empty. */
2883 * functionname_ptr = NULL;
2886 /* The caller expects a symbol name. We actually have a
2887 function name, without the leading underscore. Put the
2888 underscore back in, so that the caller gets a symbol name. */
2889 if (bfd_get_symbol_leading_char (abfd) == '\0')
2890 strcpy (buf, function);
2893 buf[0] = bfd_get_symbol_leading_char (abfd);
2894 strcpy (buf + 1, function);
2896 /* Have to remove : stuff. */
2897 colon = strchr (buf, ':');
2900 *functionname_ptr = buf;
2907 NAME (aout, sizeof_headers) (bfd *abfd,
2908 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2910 return adata (abfd).exec_bytes_size;
2913 /* Free all information we have cached for this BFD. We can always
2914 read it again later if we need it. */
2917 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2921 if (bfd_get_format (abfd) != bfd_object
2922 || abfd->tdata.aout_data == NULL)
2925 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2926 BFCI_FREE (obj_aout_symbols (abfd));
2928 obj_aout_external_syms (abfd) = 0;
2929 bfd_free_window (&obj_aout_sym_window (abfd));
2930 bfd_free_window (&obj_aout_string_window (abfd));
2931 obj_aout_external_strings (abfd) = 0;
2933 BFCI_FREE (obj_aout_external_syms (abfd));
2934 BFCI_FREE (obj_aout_external_strings (abfd));
2936 for (o = abfd->sections; o != NULL; o = o->next)
2937 BFCI_FREE (o->relocation);
2943 /* a.out link code. */
2945 /* Routine to create an entry in an a.out link hash table. */
2947 struct bfd_hash_entry *
2948 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2949 struct bfd_hash_table *table,
2952 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2954 /* Allocate the structure if it has not already been allocated by a
2957 ret = (struct aout_link_hash_entry *) bfd_hash_allocate (table,
2962 /* Call the allocation method of the superclass. */
2963 ret = ((struct aout_link_hash_entry *)
2964 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2968 /* Set local fields. */
2969 ret->written = FALSE;
2973 return (struct bfd_hash_entry *) ret;
2976 /* Initialize an a.out link hash table. */
2979 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2981 struct bfd_hash_entry *(*newfunc)
2982 (struct bfd_hash_entry *, struct bfd_hash_table *,
2984 unsigned int entsize)
2986 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2989 /* Create an a.out link hash table. */
2991 struct bfd_link_hash_table *
2992 NAME (aout, link_hash_table_create) (bfd *abfd)
2994 struct aout_link_hash_table *ret;
2995 bfd_size_type amt = sizeof (* ret);
2997 ret = (struct aout_link_hash_table *) bfd_malloc (amt);
3001 if (!NAME (aout, link_hash_table_init) (ret, abfd,
3002 NAME (aout, link_hash_newfunc),
3003 sizeof (struct aout_link_hash_entry)))
3011 /* Add all symbols from an object file to the hash table. */
3014 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
3016 bfd_boolean (*add_one_symbol)
3017 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
3018 bfd_vma, const char *, bfd_boolean, bfd_boolean,
3019 struct bfd_link_hash_entry **);
3020 struct external_nlist *syms;
3021 bfd_size_type sym_count;
3024 struct aout_link_hash_entry **sym_hash;
3025 struct external_nlist *p;
3026 struct external_nlist *pend;
3029 syms = obj_aout_external_syms (abfd);
3030 sym_count = obj_aout_external_sym_count (abfd);
3031 strings = obj_aout_external_strings (abfd);
3032 if (info->keep_memory)
3037 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3039 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3040 (abfd, info, &syms, &sym_count, &strings)))
3045 return TRUE; /* Nothing to do. */
3047 /* We keep a list of the linker hash table entries that correspond
3048 to particular symbols. We could just look them up in the hash
3049 table, but keeping the list is more efficient. Perhaps this
3050 should be conditional on info->keep_memory. */
3051 amt = sym_count * sizeof (struct aout_link_hash_entry *);
3052 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt);
3053 if (sym_hash == NULL)
3055 obj_aout_sym_hashes (abfd) = sym_hash;
3057 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3058 if (add_one_symbol == NULL)
3059 add_one_symbol = _bfd_generic_link_add_one_symbol;
3062 pend = p + sym_count;
3063 for (; p < pend; p++, sym_hash++)
3074 type = H_GET_8 (abfd, p->e_type);
3076 /* Ignore debugging symbols. */
3077 if ((type & N_STAB) != 0)
3080 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3081 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd))
3083 name = strings + GET_WORD (abfd, p->e_strx);
3084 value = GET_WORD (abfd, p->e_value);
3101 /* Ignore symbols that are not externally visible. */
3104 /* Ignore local indirect symbol. */
3109 case N_UNDF | N_EXT:
3112 section = bfd_und_section_ptr;
3116 section = bfd_com_section_ptr;
3119 section = bfd_abs_section_ptr;
3121 case N_TEXT | N_EXT:
3122 section = obj_textsec (abfd);
3123 value -= bfd_get_section_vma (abfd, section);
3125 case N_DATA | N_EXT:
3126 case N_SETV | N_EXT:
3127 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3128 translate_from_native_sym_flags. */
3129 section = obj_datasec (abfd);
3130 value -= bfd_get_section_vma (abfd, section);
3133 section = obj_bsssec (abfd);
3134 value -= bfd_get_section_vma (abfd, section);
3136 case N_INDR | N_EXT:
3137 /* An indirect symbol. The next symbol is the symbol
3138 which this one really is. */
3139 /* See PR 20925 for a reproducer. */
3143 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3144 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd))
3146 string = strings + GET_WORD (abfd, p->e_strx);
3147 section = bfd_ind_section_ptr;
3148 flags |= BSF_INDIRECT;
3150 case N_COMM | N_EXT:
3151 section = bfd_com_section_ptr;
3153 case N_SETA: case N_SETA | N_EXT:
3154 section = bfd_abs_section_ptr;
3155 flags |= BSF_CONSTRUCTOR;
3157 case N_SETT: case N_SETT | N_EXT:
3158 section = obj_textsec (abfd);
3159 flags |= BSF_CONSTRUCTOR;
3160 value -= bfd_get_section_vma (abfd, section);
3162 case N_SETD: case N_SETD | N_EXT:
3163 section = obj_datasec (abfd);
3164 flags |= BSF_CONSTRUCTOR;
3165 value -= bfd_get_section_vma (abfd, section);
3167 case N_SETB: case N_SETB | N_EXT:
3168 section = obj_bsssec (abfd);
3169 flags |= BSF_CONSTRUCTOR;
3170 value -= bfd_get_section_vma (abfd, section);
3173 /* A warning symbol. The next symbol is the one to warn
3174 about. If there is no next symbol, just look away. */
3179 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3180 if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd))
3182 name = strings + GET_WORD (abfd, p->e_strx);
3183 section = bfd_und_section_ptr;
3184 flags |= BSF_WARNING;
3187 section = bfd_und_section_ptr;
3191 section = bfd_abs_section_ptr;
3195 section = obj_textsec (abfd);
3196 value -= bfd_get_section_vma (abfd, section);
3200 section = obj_datasec (abfd);
3201 value -= bfd_get_section_vma (abfd, section);
3205 section = obj_bsssec (abfd);
3206 value -= bfd_get_section_vma (abfd, section);
3211 if (! ((*add_one_symbol)
3212 (info, abfd, name, flags, section, value, string, copy, FALSE,
3213 (struct bfd_link_hash_entry **) sym_hash)))
3216 /* Restrict the maximum alignment of a common symbol based on
3217 the architecture, since a.out has no way to represent
3218 alignment requirements of a section in a .o file. FIXME:
3219 This isn't quite right: it should use the architecture of the
3220 output file, not the input files. */
3221 if ((*sym_hash)->root.type == bfd_link_hash_common
3222 && ((*sym_hash)->root.u.c.p->alignment_power >
3223 bfd_get_arch_info (abfd)->section_align_power))
3224 (*sym_hash)->root.u.c.p->alignment_power =
3225 bfd_get_arch_info (abfd)->section_align_power;
3227 /* If this is a set symbol, and we are not building sets, then
3228 it is possible for the hash entry to not have been set. In
3229 such a case, treat the symbol as not globally defined. */
3230 if ((*sym_hash)->root.type == bfd_link_hash_new)
3232 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3236 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3243 /* Free up the internal symbols read from an a.out file. */
3246 aout_link_free_symbols (bfd *abfd)
3248 if (obj_aout_external_syms (abfd) != NULL)
3251 bfd_free_window (&obj_aout_sym_window (abfd));
3253 free ((void *) obj_aout_external_syms (abfd));
3255 obj_aout_external_syms (abfd) = NULL;
3257 if (obj_aout_external_strings (abfd) != NULL)
3260 bfd_free_window (&obj_aout_string_window (abfd));
3262 free ((void *) obj_aout_external_strings (abfd));
3264 obj_aout_external_strings (abfd) = NULL;
3269 /* Add symbols from an a.out object file. */
3272 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3274 if (! aout_get_external_symbols (abfd))
3276 if (! aout_link_add_symbols (abfd, info))
3278 if (! info->keep_memory)
3280 if (! aout_link_free_symbols (abfd))
3286 /* Look through the internal symbols to see if this object file should
3287 be included in the link. We should include this object file if it
3288 defines any symbols which are currently undefined. If this object
3289 file defines a common symbol, then we may adjust the size of the
3290 known symbol but we do not include the object file in the link
3291 (unless there is some other reason to include it). */
3294 aout_link_check_ar_symbols (bfd *abfd,
3295 struct bfd_link_info *info,
3296 bfd_boolean *pneeded,
3299 struct external_nlist *p;
3300 struct external_nlist *pend;
3305 /* Look through all the symbols. */
3306 p = obj_aout_external_syms (abfd);
3307 pend = p + obj_aout_external_sym_count (abfd);
3308 strings = obj_aout_external_strings (abfd);
3309 for (; p < pend; p++)
3311 int type = H_GET_8 (abfd, p->e_type);
3313 struct bfd_link_hash_entry *h;
3315 /* Ignore symbols that are not externally visible. This is an
3316 optimization only, as we check the type more thoroughly
3318 if (((type & N_EXT) == 0
3319 || (type & N_STAB) != 0
3326 if (type == N_WARNING
3332 name = strings + GET_WORD (abfd, p->e_strx);
3333 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3335 /* We are only interested in symbols that are currently
3336 undefined or common. */
3338 || (h->type != bfd_link_hash_undefined
3339 && h->type != bfd_link_hash_common))
3341 if (type == (N_INDR | N_EXT))
3346 if (type == (N_TEXT | N_EXT)
3347 || type == (N_DATA | N_EXT)
3348 || type == (N_BSS | N_EXT)
3349 || type == (N_ABS | N_EXT)
3350 || type == (N_INDR | N_EXT))
3352 /* This object file defines this symbol. We must link it
3353 in. This is true regardless of whether the current
3354 definition of the symbol is undefined or common.
3356 If the current definition is common, we have a case in
3357 which we have already seen an object file including:
3359 and this object file from the archive includes:
3361 In such a case, whether to include this object is target
3362 dependant for backward compatibility.
3364 FIXME: The SunOS 4.1.3 linker will pull in the archive
3365 element if the symbol is defined in the .data section,
3366 but not if it is defined in the .text section. That
3367 seems a bit crazy to me, and it has not been implemented
3368 yet. However, it might be correct. */
3369 if (h->type == bfd_link_hash_common)
3373 switch (info->common_skip_ar_symbols)
3375 case bfd_link_common_skip_none:
3377 case bfd_link_common_skip_text:
3378 skip = (type == (N_TEXT | N_EXT));
3380 case bfd_link_common_skip_data:
3381 skip = (type == (N_DATA | N_EXT));
3383 case bfd_link_common_skip_all:
3392 if (!(*info->callbacks
3393 ->add_archive_element) (info, abfd, name, subsbfd))
3399 if (type == (N_UNDF | N_EXT))
3403 value = GET_WORD (abfd, p->e_value);
3406 /* This symbol is common in the object from the archive
3408 if (h->type == bfd_link_hash_undefined)
3413 symbfd = h->u.undef.abfd;
3416 /* This symbol was created as undefined from
3417 outside BFD. We assume that we should link
3418 in the object file. This is done for the -u
3419 option in the linker. */
3420 if (!(*info->callbacks
3421 ->add_archive_element) (info, abfd, name, subsbfd))
3426 /* Turn the current link symbol into a common
3427 symbol. It is already on the undefs list. */
3428 h->type = bfd_link_hash_common;
3429 h->u.c.p = (struct bfd_link_hash_common_entry *)
3430 bfd_hash_allocate (&info->hash->table,
3431 sizeof (struct bfd_link_hash_common_entry));
3432 if (h->u.c.p == NULL)
3435 h->u.c.size = value;
3437 /* FIXME: This isn't quite right. The maximum
3438 alignment of a common symbol should be set by the
3439 architecture of the output file, not of the input
3441 power = bfd_log2 (value);
3442 if (power > bfd_get_arch_info (abfd)->section_align_power)
3443 power = bfd_get_arch_info (abfd)->section_align_power;
3444 h->u.c.p->alignment_power = power;
3446 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3451 /* Adjust the size of the common symbol if
3453 if (value > h->u.c.size)
3454 h->u.c.size = value;
3464 /* This symbol is weak but defined. We must pull it in if
3465 the current link symbol is undefined, but we don't want
3466 it if the current link symbol is common. */
3467 if (h->type == bfd_link_hash_undefined)
3469 if (!(*info->callbacks
3470 ->add_archive_element) (info, abfd, name, subsbfd))
3478 /* We do not need this object file. */
3481 /* Check a single archive element to see if we need to include it in
3482 the link. *PNEEDED is set according to whether this element is
3483 needed in the link or not. This is called from
3484 _bfd_generic_link_add_archive_symbols. */
3487 aout_link_check_archive_element (bfd *abfd,
3488 struct bfd_link_info *info,
3489 struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED,
3490 const char *name ATTRIBUTE_UNUSED,
3491 bfd_boolean *pneeded)
3496 if (!aout_get_external_symbols (abfd))
3500 if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd))
3506 /* Potentially, the add_archive_element hook may have set a
3507 substitute BFD for us. */
3510 if (!info->keep_memory
3511 && !aout_link_free_symbols (oldbfd))
3513 if (!aout_get_external_symbols (abfd))
3516 if (!aout_link_add_symbols (abfd, info))
3520 if (!info->keep_memory || !needed)
3522 if (!aout_link_free_symbols (abfd))
3529 /* Given an a.out BFD, add symbols to the global hash table as
3533 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3535 switch (bfd_get_format (abfd))
3538 return aout_link_add_object_symbols (abfd, info);
3540 return _bfd_generic_link_add_archive_symbols
3541 (abfd, info, aout_link_check_archive_element);
3543 bfd_set_error (bfd_error_wrong_format);
3548 /* A hash table used for header files with N_BINCL entries. */
3550 struct aout_link_includes_table
3552 struct bfd_hash_table root;
3555 /* A linked list of totals that we have found for a particular header
3558 struct aout_link_includes_totals
3560 struct aout_link_includes_totals *next;
3564 /* An entry in the header file hash table. */
3566 struct aout_link_includes_entry
3568 struct bfd_hash_entry root;
3569 /* List of totals we have found for this file. */
3570 struct aout_link_includes_totals *totals;
3573 /* Look up an entry in an the header file hash table. */
3575 #define aout_link_includes_lookup(table, string, create, copy) \
3576 ((struct aout_link_includes_entry *) \
3577 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3579 /* During the final link step we need to pass around a bunch of
3580 information, so we do it in an instance of this structure. */
3582 struct aout_final_link_info
3584 /* General link information. */
3585 struct bfd_link_info *info;
3588 /* Reloc file positions. */
3589 file_ptr treloff, dreloff;
3590 /* File position of symbols. */
3593 struct bfd_strtab_hash *strtab;
3594 /* Header file hash table. */
3595 struct aout_link_includes_table includes;
3596 /* A buffer large enough to hold the contents of any section. */
3598 /* A buffer large enough to hold the relocs of any section. */
3600 /* A buffer large enough to hold the symbol map of any input BFD. */
3602 /* A buffer large enough to hold output symbols of any input BFD. */
3603 struct external_nlist *output_syms;
3606 /* The function to create a new entry in the header file hash table. */
3608 static struct bfd_hash_entry *
3609 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3610 struct bfd_hash_table *table,
3613 struct aout_link_includes_entry *ret =
3614 (struct aout_link_includes_entry *) entry;
3616 /* Allocate the structure if it has not already been allocated by a
3619 ret = (struct aout_link_includes_entry *)
3620 bfd_hash_allocate (table, sizeof (* ret));
3624 /* Call the allocation method of the superclass. */
3625 ret = ((struct aout_link_includes_entry *)
3626 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3629 /* Set local fields. */
3633 return (struct bfd_hash_entry *) ret;
3636 /* Write out a symbol that was not associated with an a.out input
3640 aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data)
3642 struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh;
3643 struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data;
3647 struct external_nlist outsym;
3651 if (h->root.type == bfd_link_hash_warning)
3653 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3654 if (h->root.type == bfd_link_hash_new)
3658 output_bfd = flaginfo->output_bfd;
3660 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3662 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3663 (output_bfd, flaginfo->info, h)))
3665 /* FIXME: No way to handle errors. */
3675 /* An indx of -2 means the symbol must be written. */
3677 && (flaginfo->info->strip == strip_all
3678 || (flaginfo->info->strip == strip_some
3679 && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string,
3680 FALSE, FALSE) == NULL)))
3683 switch (h->root.type)
3686 case bfd_link_hash_warning:
3688 /* Avoid variable not initialized warnings. */
3690 case bfd_link_hash_new:
3691 /* This can happen for set symbols when sets are not being
3694 case bfd_link_hash_undefined:
3695 type = N_UNDF | N_EXT;
3698 case bfd_link_hash_defined:
3699 case bfd_link_hash_defweak:
3703 sec = h->root.u.def.section->output_section;
3704 BFD_ASSERT (bfd_is_abs_section (sec)
3705 || sec->owner == output_bfd);
3706 if (sec == obj_textsec (output_bfd))
3707 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3708 else if (sec == obj_datasec (output_bfd))
3709 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3710 else if (sec == obj_bsssec (output_bfd))
3711 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3713 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3715 val = (h->root.u.def.value
3717 + h->root.u.def.section->output_offset);
3720 case bfd_link_hash_common:
3721 type = N_UNDF | N_EXT;
3722 val = h->root.u.c.size;
3724 case bfd_link_hash_undefweak:
3728 case bfd_link_hash_indirect:
3729 /* We ignore these symbols, since the indirected symbol is
3730 already in the hash table. */
3734 H_PUT_8 (output_bfd, type, outsym.e_type);
3735 H_PUT_8 (output_bfd, 0, outsym.e_other);
3736 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3737 indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string,
3739 if (indx == - (bfd_size_type) 1)
3740 /* FIXME: No way to handle errors. */
3743 PUT_WORD (output_bfd, indx, outsym.e_strx);
3744 PUT_WORD (output_bfd, val, outsym.e_value);
3746 amt = EXTERNAL_NLIST_SIZE;
3747 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0
3748 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3749 /* FIXME: No way to handle errors. */
3752 flaginfo->symoff += EXTERNAL_NLIST_SIZE;
3753 h->indx = obj_aout_external_sym_count (output_bfd);
3754 ++obj_aout_external_sym_count (output_bfd);
3759 /* Handle a link order which is supposed to generate a reloc. */
3762 aout_link_reloc_link_order (struct aout_final_link_info *flaginfo,
3764 struct bfd_link_order *p)
3766 struct bfd_link_order_reloc *pr;
3769 reloc_howto_type *howto;
3770 file_ptr *reloff_ptr = NULL;
3771 struct reloc_std_external srel;
3772 struct reloc_ext_external erel;
3778 if (p->type == bfd_section_reloc_link_order)
3781 if (bfd_is_abs_section (pr->u.section))
3782 r_index = N_ABS | N_EXT;
3785 BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd);
3786 r_index = pr->u.section->target_index;
3791 struct aout_link_hash_entry *h;
3793 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3795 h = ((struct aout_link_hash_entry *)
3796 bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info,
3797 pr->u.name, FALSE, FALSE, TRUE));
3803 /* We decided to strip this symbol, but it turns out that we
3804 can't. Note that we lose the other and desc information
3805 here. I don't think that will ever matter for a global
3809 if (!aout_link_write_other_symbol (&h->root.root, flaginfo))
3815 (*flaginfo->info->callbacks->unattached_reloc)
3816 (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0);
3821 howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc);
3824 bfd_set_error (bfd_error_bad_value);
3828 if (o == obj_textsec (flaginfo->output_bfd))
3829 reloff_ptr = &flaginfo->treloff;
3830 else if (o == obj_datasec (flaginfo->output_bfd))
3831 reloff_ptr = &flaginfo->dreloff;
3835 if (obj_reloc_entry_size (flaginfo->output_bfd) == RELOC_STD_SIZE)
3838 MY_put_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, howto,
3848 r_pcrel = (int) howto->pc_relative;
3849 r_baserel = (howto->type & 8) != 0;
3850 r_jmptable = (howto->type & 16) != 0;
3851 r_relative = (howto->type & 32) != 0;
3852 r_length = howto->size;
3854 PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address);
3855 if (bfd_header_big_endian (flaginfo->output_bfd))
3857 srel.r_index[0] = r_index >> 16;
3858 srel.r_index[1] = r_index >> 8;
3859 srel.r_index[2] = r_index;
3861 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3862 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3863 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3864 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3865 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3866 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3870 srel.r_index[2] = r_index >> 16;
3871 srel.r_index[1] = r_index >> 8;
3872 srel.r_index[0] = r_index;
3874 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3875 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3876 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3877 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3878 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3879 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3883 rel_ptr = (void *) &srel;
3885 /* We have to write the addend into the object file, since
3886 standard a.out relocs are in place. It would be more
3887 reliable if we had the current contents of the file here,
3888 rather than assuming zeroes, but we can't read the file since
3889 it was opened using bfd_openw. */
3890 if (pr->addend != 0)
3893 bfd_reloc_status_type r;
3897 size = bfd_get_reloc_size (howto);
3898 buf = (bfd_byte *) bfd_zmalloc (size);
3899 if (buf == NULL && size != 0)
3901 r = MY_relocate_contents (howto, flaginfo->output_bfd,
3902 (bfd_vma) pr->addend, buf);
3908 case bfd_reloc_outofrange:
3910 case bfd_reloc_overflow:
3911 (*flaginfo->info->callbacks->reloc_overflow)
3912 (flaginfo->info, NULL,
3913 (p->type == bfd_section_reloc_link_order
3914 ? bfd_section_name (flaginfo->output_bfd,
3917 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0);
3920 ok = bfd_set_section_contents (flaginfo->output_bfd, o, (void *) buf,
3921 (file_ptr) p->offset, size);
3929 #ifdef MY_put_ext_reloc
3930 MY_put_ext_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset,
3931 howto, &erel, pr->addend);
3933 PUT_WORD (flaginfo->output_bfd, p->offset, erel.r_address);
3935 if (bfd_header_big_endian (flaginfo->output_bfd))
3937 erel.r_index[0] = r_index >> 16;
3938 erel.r_index[1] = r_index >> 8;
3939 erel.r_index[2] = r_index;
3941 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3942 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3946 erel.r_index[2] = r_index >> 16;
3947 erel.r_index[1] = r_index >> 8;
3948 erel.r_index[0] = r_index;
3950 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3951 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3954 PUT_WORD (flaginfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3955 #endif /* MY_put_ext_reloc */
3957 rel_ptr = (void *) &erel;
3960 amt = obj_reloc_entry_size (flaginfo->output_bfd);
3961 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3962 || bfd_bwrite (rel_ptr, amt, flaginfo->output_bfd) != amt)
3965 *reloff_ptr += obj_reloc_entry_size (flaginfo->output_bfd);
3967 /* Assert that the relocs have not run into the symbols, and that n
3968 the text relocs have not run into the data relocs. */
3969 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
3970 && (reloff_ptr != &flaginfo->treloff
3972 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
3977 /* Get the section corresponding to a reloc index. */
3979 static INLINE asection *
3980 aout_reloc_index_to_section (bfd *abfd, int indx)
3982 switch (indx & N_TYPE)
3984 case N_TEXT: return obj_textsec (abfd);
3985 case N_DATA: return obj_datasec (abfd);
3986 case N_BSS: return obj_bsssec (abfd);
3988 case N_UNDF: return bfd_abs_section_ptr;
3994 /* Relocate an a.out section using standard a.out relocs. */
3997 aout_link_input_section_std (struct aout_final_link_info *flaginfo,
3999 asection *input_section,
4000 struct reloc_std_external *relocs,
4001 bfd_size_type rel_size,
4004 bfd_boolean (*check_dynamic_reloc)
4005 (struct bfd_link_info *, bfd *, asection *,
4006 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4009 bfd_boolean relocatable;
4010 struct external_nlist *syms;
4012 struct aout_link_hash_entry **sym_hashes;
4014 bfd_size_type reloc_count;
4015 struct reloc_std_external *rel;
4016 struct reloc_std_external *rel_end;
4018 output_bfd = flaginfo->output_bfd;
4019 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4021 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4022 BFD_ASSERT (input_bfd->xvec->header_byteorder
4023 == output_bfd->xvec->header_byteorder);
4025 relocatable = bfd_link_relocatable (flaginfo->info);
4026 syms = obj_aout_external_syms (input_bfd);
4027 strings = obj_aout_external_strings (input_bfd);
4028 sym_hashes = obj_aout_sym_hashes (input_bfd);
4029 symbol_map = flaginfo->symbol_map;
4031 reloc_count = rel_size / RELOC_STD_SIZE;
4033 rel_end = rel + reloc_count;
4034 for (; rel < rel_end; rel++)
4041 reloc_howto_type *howto;
4042 struct aout_link_hash_entry *h = NULL;
4044 bfd_reloc_status_type r;
4046 r_addr = GET_SWORD (input_bfd, rel->r_address);
4048 #ifdef MY_reloc_howto
4049 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
4055 unsigned int howto_idx;
4057 if (bfd_header_big_endian (input_bfd))
4059 r_index = (((unsigned int) rel->r_index[0] << 16)
4060 | ((unsigned int) rel->r_index[1] << 8)
4062 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4063 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4064 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4065 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4066 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4067 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4068 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4072 r_index = (((unsigned int) rel->r_index[2] << 16)
4073 | ((unsigned int) rel->r_index[1] << 8)
4075 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4076 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4077 r_baserel = (0 != (rel->r_type[0]
4078 & RELOC_STD_BITS_BASEREL_LITTLE));
4079 r_jmptable= (0 != (rel->r_type[0]
4080 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4081 r_relative= (0 != (rel->r_type[0]
4082 & RELOC_STD_BITS_RELATIVE_LITTLE));
4083 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4084 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4087 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4088 + 16 * r_jmptable + 32 * r_relative);
4089 if (howto_idx < TABLE_SIZE (howto_table_std))
4090 howto = howto_table_std + howto_idx;
4098 _bfd_error_handler (_("%pB: unsupported relocation type"),
4100 bfd_set_error (bfd_error_bad_value);
4106 /* We are generating a relocatable output file, and must
4107 modify the reloc accordingly. */
4110 /* If we know the symbol this relocation is against,
4111 convert it into a relocation against a section. This
4112 is what the native linker does. */
4113 h = sym_hashes[r_index];
4115 && (h->root.type == bfd_link_hash_defined
4116 || h->root.type == bfd_link_hash_defweak))
4118 asection *output_section;
4120 /* Change the r_extern value. */
4121 if (bfd_header_big_endian (output_bfd))
4122 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4124 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4126 /* Compute a new r_index. */
4127 output_section = h->root.u.def.section->output_section;
4128 if (output_section == obj_textsec (output_bfd))
4130 else if (output_section == obj_datasec (output_bfd))
4132 else if (output_section == obj_bsssec (output_bfd))
4137 /* Add the symbol value and the section VMA to the
4138 addend stored in the contents. */
4139 relocation = (h->root.u.def.value
4140 + output_section->vma
4141 + h->root.u.def.section->output_offset);
4145 /* We must change r_index according to the symbol
4147 r_index = symbol_map[r_index];
4153 /* We decided to strip this symbol, but it
4154 turns out that we can't. Note that we
4155 lose the other and desc information here.
4156 I don't think that will ever matter for a
4162 if (!aout_link_write_other_symbol (&h->root.root,
4172 name = strings + GET_WORD (input_bfd,
4173 syms[r_index].e_strx);
4174 (*flaginfo->info->callbacks->unattached_reloc)
4175 (flaginfo->info, name,
4176 input_bfd, input_section, r_addr);
4184 /* Write out the new r_index value. */
4185 if (bfd_header_big_endian (output_bfd))
4187 rel->r_index[0] = r_index >> 16;
4188 rel->r_index[1] = r_index >> 8;
4189 rel->r_index[2] = r_index;
4193 rel->r_index[2] = r_index >> 16;
4194 rel->r_index[1] = r_index >> 8;
4195 rel->r_index[0] = r_index;
4202 /* This is a relocation against a section. We must
4203 adjust by the amount that the section moved. */
4204 section = aout_reloc_index_to_section (input_bfd, r_index);
4205 relocation = (section->output_section->vma
4206 + section->output_offset
4210 /* Change the address of the relocation. */
4211 PUT_WORD (output_bfd,
4212 r_addr + input_section->output_offset,
4215 /* Adjust a PC relative relocation by removing the reference
4216 to the original address in the section and including the
4217 reference to the new address. */
4219 relocation -= (input_section->output_section->vma
4220 + input_section->output_offset
4221 - input_section->vma);
4223 #ifdef MY_relocatable_reloc
4224 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4227 if (relocation == 0)
4230 r = MY_relocate_contents (howto,
4231 input_bfd, relocation,
4238 /* We are generating an executable, and must do a full
4244 h = sym_hashes[r_index];
4247 && (h->root.type == bfd_link_hash_defined
4248 || h->root.type == bfd_link_hash_defweak))
4250 relocation = (h->root.u.def.value
4251 + h->root.u.def.section->output_section->vma
4252 + h->root.u.def.section->output_offset);
4255 && h->root.type == bfd_link_hash_undefweak)
4267 section = aout_reloc_index_to_section (input_bfd, r_index);
4268 relocation = (section->output_section->vma
4269 + section->output_offset
4272 relocation += input_section->vma;
4275 if (check_dynamic_reloc != NULL)
4279 if (! ((*check_dynamic_reloc)
4280 (flaginfo->info, input_bfd, input_section, h,
4281 (void *) rel, contents, &skip, &relocation)))
4287 /* Now warn if a global symbol is undefined. We could not
4288 do this earlier, because check_dynamic_reloc might want
4289 to skip this reloc. */
4290 if (hundef && ! bfd_link_pic (flaginfo->info) && ! r_baserel)
4295 name = h->root.root.string;
4297 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4298 (*flaginfo->info->callbacks->undefined_symbol)
4299 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE);
4302 r = MY_final_link_relocate (howto,
4303 input_bfd, input_section,
4304 contents, r_addr, relocation,
4308 if (r != bfd_reloc_ok)
4313 case bfd_reloc_outofrange:
4315 case bfd_reloc_overflow:
4322 name = strings + GET_WORD (input_bfd,
4323 syms[r_index].e_strx);
4328 s = aout_reloc_index_to_section (input_bfd, r_index);
4329 name = bfd_section_name (input_bfd, s);
4331 (*flaginfo->info->callbacks->reloc_overflow)
4332 (flaginfo->info, (h ? &h->root : NULL), name, howto->name,
4333 (bfd_vma) 0, input_bfd, input_section, r_addr);
4343 /* Relocate an a.out section using extended a.out relocs. */
4346 aout_link_input_section_ext (struct aout_final_link_info *flaginfo,
4348 asection *input_section,
4349 struct reloc_ext_external *relocs,
4350 bfd_size_type rel_size,
4353 bfd_boolean (*check_dynamic_reloc)
4354 (struct bfd_link_info *, bfd *, asection *,
4355 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4358 bfd_boolean relocatable;
4359 struct external_nlist *syms;
4361 struct aout_link_hash_entry **sym_hashes;
4363 bfd_size_type reloc_count;
4364 struct reloc_ext_external *rel;
4365 struct reloc_ext_external *rel_end;
4367 output_bfd = flaginfo->output_bfd;
4368 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4370 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4371 BFD_ASSERT (input_bfd->xvec->header_byteorder
4372 == output_bfd->xvec->header_byteorder);
4374 relocatable = bfd_link_relocatable (flaginfo->info);
4375 syms = obj_aout_external_syms (input_bfd);
4376 strings = obj_aout_external_strings (input_bfd);
4377 sym_hashes = obj_aout_sym_hashes (input_bfd);
4378 symbol_map = flaginfo->symbol_map;
4380 reloc_count = rel_size / RELOC_EXT_SIZE;
4382 rel_end = rel + reloc_count;
4383 for (; rel < rel_end; rel++)
4388 unsigned int r_type;
4390 struct aout_link_hash_entry *h = NULL;
4391 asection *r_section = NULL;
4394 r_addr = GET_SWORD (input_bfd, rel->r_address);
4396 if (bfd_header_big_endian (input_bfd))
4398 r_index = (((unsigned int) rel->r_index[0] << 16)
4399 | ((unsigned int) rel->r_index[1] << 8)
4401 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4402 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4403 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4407 r_index = (((unsigned int) rel->r_index[2] << 16)
4408 | ((unsigned int) rel->r_index[1] << 8)
4410 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4411 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4412 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4415 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4417 if (r_type >= TABLE_SIZE (howto_table_ext))
4419 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
4421 bfd_set_error (bfd_error_bad_value);
4427 /* We are generating a relocatable output file, and must
4428 modify the reloc accordingly. */
4430 || r_type == (unsigned int) RELOC_BASE10
4431 || r_type == (unsigned int) RELOC_BASE13
4432 || r_type == (unsigned int) RELOC_BASE22)
4434 /* If we know the symbol this relocation is against,
4435 convert it into a relocation against a section. This
4436 is what the native linker does. */
4437 if (r_type == (unsigned int) RELOC_BASE10
4438 || r_type == (unsigned int) RELOC_BASE13
4439 || r_type == (unsigned int) RELOC_BASE22)
4442 h = sym_hashes[r_index];
4444 && (h->root.type == bfd_link_hash_defined
4445 || h->root.type == bfd_link_hash_defweak))
4447 asection *output_section;
4449 /* Change the r_extern value. */
4450 if (bfd_header_big_endian (output_bfd))
4451 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4453 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4455 /* Compute a new r_index. */
4456 output_section = h->root.u.def.section->output_section;
4457 if (output_section == obj_textsec (output_bfd))
4459 else if (output_section == obj_datasec (output_bfd))
4461 else if (output_section == obj_bsssec (output_bfd))
4466 /* Add the symbol value and the section VMA to the
4468 relocation = (h->root.u.def.value
4469 + output_section->vma
4470 + h->root.u.def.section->output_offset);
4472 /* Now RELOCATION is the VMA of the final
4473 destination. If this is a PC relative reloc,
4474 then ADDEND is the negative of the source VMA.
4475 We want to set ADDEND to the difference between
4476 the destination VMA and the source VMA, which
4477 means we must adjust RELOCATION by the change in
4478 the source VMA. This is done below. */
4482 /* We must change r_index according to the symbol
4484 r_index = symbol_map[r_index];
4490 /* We decided to strip this symbol, but it
4491 turns out that we can't. Note that we
4492 lose the other and desc information here.
4493 I don't think that will ever matter for a
4499 if (!aout_link_write_other_symbol (&h->root.root,
4509 name = strings + GET_WORD (input_bfd,
4510 syms[r_index].e_strx);
4511 (*flaginfo->info->callbacks->unattached_reloc)
4512 (flaginfo->info, name,
4513 input_bfd, input_section, r_addr);
4520 /* If this is a PC relative reloc, then the addend
4521 is the negative of the source VMA. We must
4522 adjust it by the change in the source VMA. This
4526 /* Write out the new r_index value. */
4527 if (bfd_header_big_endian (output_bfd))
4529 rel->r_index[0] = r_index >> 16;
4530 rel->r_index[1] = r_index >> 8;
4531 rel->r_index[2] = r_index;
4535 rel->r_index[2] = r_index >> 16;
4536 rel->r_index[1] = r_index >> 8;
4537 rel->r_index[0] = r_index;
4542 /* This is a relocation against a section. We must
4543 adjust by the amount that the section moved. */
4544 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4545 relocation = (r_section->output_section->vma
4546 + r_section->output_offset
4549 /* If this is a PC relative reloc, then the addend is
4550 the difference in VMA between the destination and the
4551 source. We have just adjusted for the change in VMA
4552 of the destination, so we must also adjust by the
4553 change in VMA of the source. This is done below. */
4556 /* As described above, we must always adjust a PC relative
4557 reloc by the change in VMA of the source. However, if
4558 pcrel_offset is set, then the addend does not include the
4559 location within the section, in which case we don't need
4560 to adjust anything. */
4561 if (howto_table_ext[r_type].pc_relative
4562 && ! howto_table_ext[r_type].pcrel_offset)
4563 relocation -= (input_section->output_section->vma
4564 + input_section->output_offset
4565 - input_section->vma);
4567 /* Change the addend if necessary. */
4568 if (relocation != 0)
4569 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4571 /* Change the address of the relocation. */
4572 PUT_WORD (output_bfd,
4573 r_addr + input_section->output_offset,
4579 bfd_reloc_status_type r;
4581 /* We are generating an executable, and must do a full
4587 h = sym_hashes[r_index];
4590 && (h->root.type == bfd_link_hash_defined
4591 || h->root.type == bfd_link_hash_defweak))
4593 relocation = (h->root.u.def.value
4594 + h->root.u.def.section->output_section->vma
4595 + h->root.u.def.section->output_offset);
4598 && h->root.type == bfd_link_hash_undefweak)
4606 else if (r_type == (unsigned int) RELOC_BASE10
4607 || r_type == (unsigned int) RELOC_BASE13
4608 || r_type == (unsigned int) RELOC_BASE22)
4610 struct external_nlist *sym;
4613 /* For base relative relocs, r_index is always an index
4614 into the symbol table, even if r_extern is 0. */
4615 sym = syms + r_index;
4616 type = H_GET_8 (input_bfd, sym->e_type);
4617 if ((type & N_TYPE) == N_TEXT
4619 r_section = obj_textsec (input_bfd);
4620 else if ((type & N_TYPE) == N_DATA
4622 r_section = obj_datasec (input_bfd);
4623 else if ((type & N_TYPE) == N_BSS
4625 r_section = obj_bsssec (input_bfd);
4626 else if ((type & N_TYPE) == N_ABS
4628 r_section = bfd_abs_section_ptr;
4631 relocation = (r_section->output_section->vma
4632 + r_section->output_offset
4633 + (GET_WORD (input_bfd, sym->e_value)
4638 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4640 /* If this is a PC relative reloc, then R_ADDEND is the
4641 difference between the two vmas, or
4642 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4644 old_dest_sec == section->vma
4646 old_src_sec == input_section->vma
4648 old_src_off == r_addr
4650 _bfd_final_link_relocate expects RELOCATION +
4651 R_ADDEND to be the VMA of the destination minus
4652 r_addr (the minus r_addr is because this relocation
4653 is not pcrel_offset, which is a bit confusing and
4654 should, perhaps, be changed), or
4657 new_dest_sec == output_section->vma + output_offset
4658 We arrange for this to happen by setting RELOCATION to
4659 new_dest_sec + old_src_sec - old_dest_sec
4661 If this is not a PC relative reloc, then R_ADDEND is
4662 simply the VMA of the destination, so we set
4663 RELOCATION to the change in the destination VMA, or
4664 new_dest_sec - old_dest_sec
4666 relocation = (r_section->output_section->vma
4667 + r_section->output_offset
4669 if (howto_table_ext[r_type].pc_relative)
4670 relocation += input_section->vma;
4673 if (check_dynamic_reloc != NULL)
4677 if (! ((*check_dynamic_reloc)
4678 (flaginfo->info, input_bfd, input_section, h,
4679 (void *) rel, contents, &skip, &relocation)))
4685 /* Now warn if a global symbol is undefined. We could not
4686 do this earlier, because check_dynamic_reloc might want
4687 to skip this reloc. */
4689 && ! bfd_link_pic (flaginfo->info)
4690 && r_type != (unsigned int) RELOC_BASE10
4691 && r_type != (unsigned int) RELOC_BASE13
4692 && r_type != (unsigned int) RELOC_BASE22)
4697 name = h->root.root.string;
4699 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4700 (*flaginfo->info->callbacks->undefined_symbol)
4701 (flaginfo->info, name, input_bfd, input_section, r_addr, TRUE);
4704 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4705 r = MY_final_link_relocate (howto_table_ext + r_type,
4706 input_bfd, input_section,
4707 contents, r_addr, relocation,
4713 x = bfd_get_32 (input_bfd, contents + r_addr);
4714 x = x + relocation + r_addend;
4715 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4719 if (r != bfd_reloc_ok)
4724 case bfd_reloc_outofrange:
4726 case bfd_reloc_overflow:
4733 || r_type == (unsigned int) RELOC_BASE10
4734 || r_type == (unsigned int) RELOC_BASE13
4735 || r_type == (unsigned int) RELOC_BASE22)
4736 name = strings + GET_WORD (input_bfd,
4737 syms[r_index].e_strx);
4742 s = aout_reloc_index_to_section (input_bfd, r_index);
4743 name = bfd_section_name (input_bfd, s);
4745 (*flaginfo->info->callbacks->reloc_overflow)
4746 (flaginfo->info, (h ? &h->root : NULL), name,
4747 howto_table_ext[r_type].name,
4748 r_addend, input_bfd, input_section, r_addr);
4759 /* Link an a.out section into the output file. */
4762 aout_link_input_section (struct aout_final_link_info *flaginfo,
4764 asection *input_section,
4765 file_ptr *reloff_ptr,
4766 bfd_size_type rel_size)
4768 bfd_size_type input_size;
4771 /* Get the section contents. */
4772 input_size = input_section->size;
4773 if (! bfd_get_section_contents (input_bfd, input_section,
4774 (void *) flaginfo->contents,
4775 (file_ptr) 0, input_size))
4778 /* Read in the relocs if we haven't already done it. */
4779 if (aout_section_data (input_section) != NULL
4780 && aout_section_data (input_section)->relocs != NULL)
4781 relocs = aout_section_data (input_section)->relocs;
4784 relocs = flaginfo->relocs;
4787 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4788 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4793 /* Relocate the section contents. */
4794 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4796 if (! aout_link_input_section_std (flaginfo, input_bfd, input_section,
4797 (struct reloc_std_external *) relocs,
4798 rel_size, flaginfo->contents))
4803 if (! aout_link_input_section_ext (flaginfo, input_bfd, input_section,
4804 (struct reloc_ext_external *) relocs,
4805 rel_size, flaginfo->contents))
4809 /* Write out the section contents. */
4810 if (! bfd_set_section_contents (flaginfo->output_bfd,
4811 input_section->output_section,
4812 (void *) flaginfo->contents,
4813 (file_ptr) input_section->output_offset,
4817 /* If we are producing relocatable output, the relocs were
4818 modified, and we now write them out. */
4819 if (bfd_link_relocatable (flaginfo->info) && rel_size > 0)
4821 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4823 if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size)
4825 *reloff_ptr += rel_size;
4827 /* Assert that the relocs have not run into the symbols, and
4828 that if these are the text relocs they have not run into the
4830 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
4831 && (reloff_ptr != &flaginfo->treloff
4833 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
4839 /* Adjust and write out the symbols for an a.out file. Set the new
4840 symbol indices into a symbol_map. */
4843 aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd)
4846 bfd_size_type sym_count;
4848 enum bfd_link_strip strip;
4849 enum bfd_link_discard discard;
4850 struct external_nlist *outsym;
4851 bfd_size_type strtab_index;
4852 struct external_nlist *sym;
4853 struct external_nlist *sym_end;
4854 struct aout_link_hash_entry **sym_hash;
4857 bfd_boolean skip_next;
4859 output_bfd = flaginfo->output_bfd;
4860 sym_count = obj_aout_external_sym_count (input_bfd);
4861 strings = obj_aout_external_strings (input_bfd);
4862 strip = flaginfo->info->strip;
4863 discard = flaginfo->info->discard;
4864 outsym = flaginfo->output_syms;
4866 /* First write out a symbol for this object file, unless we are
4867 discarding such symbols. */
4868 if (strip != strip_all
4869 && (strip != strip_some
4870 || bfd_hash_lookup (flaginfo->info->keep_hash, input_bfd->filename,
4871 FALSE, FALSE) != NULL)
4872 && discard != discard_all)
4874 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4875 H_PUT_8 (output_bfd, 0, outsym->e_other);
4876 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4877 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
4878 input_bfd->filename, FALSE);
4879 if (strtab_index == (bfd_size_type) -1)
4881 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4882 PUT_WORD (output_bfd,
4883 (bfd_get_section_vma (output_bfd,
4884 obj_textsec (input_bfd)->output_section)
4885 + obj_textsec (input_bfd)->output_offset),
4887 ++obj_aout_external_sym_count (output_bfd);
4893 sym = obj_aout_external_syms (input_bfd);
4894 sym_end = sym + sym_count;
4895 sym_hash = obj_aout_sym_hashes (input_bfd);
4896 symbol_map = flaginfo->symbol_map;
4897 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4898 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4902 struct aout_link_hash_entry *h;
4908 /* We set *symbol_map to 0 above for all symbols. If it has
4909 already been set to -1 for this symbol, it means that we are
4910 discarding it because it appears in a duplicate header file.
4911 See the N_BINCL code below. */
4912 if (*symbol_map == -1)
4915 /* Initialize *symbol_map to -1, which means that the symbol was
4916 not copied into the output file. We will change it later if
4917 we do copy the symbol over. */
4920 type = H_GET_8 (input_bfd, sym->e_type);
4921 name = strings + GET_WORD (input_bfd, sym->e_strx);
4927 /* Pass this symbol through. It is the target of an
4928 indirect or warning symbol. */
4929 val = GET_WORD (input_bfd, sym->e_value);
4934 /* Skip this symbol, which is the target of an indirect
4935 symbol that we have changed to no longer be an indirect
4942 struct aout_link_hash_entry *hresolve;
4944 /* We have saved the hash table entry for this symbol, if
4945 there is one. Note that we could just look it up again
4946 in the hash table, provided we first check that it is an
4950 /* Use the name from the hash table, in case the symbol was
4953 && h->root.type != bfd_link_hash_warning)
4954 name = h->root.root.string;
4956 /* If this is an indirect or warning symbol, then change
4957 hresolve to the base symbol. We also change *sym_hash so
4958 that the relocation routines relocate against the real
4961 if (h != (struct aout_link_hash_entry *) NULL
4962 && (h->root.type == bfd_link_hash_indirect
4963 || h->root.type == bfd_link_hash_warning))
4965 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4966 while (hresolve->root.type == bfd_link_hash_indirect
4967 || hresolve->root.type == bfd_link_hash_warning)
4968 hresolve = ((struct aout_link_hash_entry *)
4969 hresolve->root.u.i.link);
4970 *sym_hash = hresolve;
4973 /* If the symbol has already been written out, skip it. */
4977 if ((type & N_TYPE) == N_INDR
4978 || type == N_WARNING)
4980 *symbol_map = h->indx;
4984 /* See if we are stripping this symbol. */
4990 case strip_debugger:
4991 if ((type & N_STAB) != 0)
4995 if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE)
5010 /* Get the value of the symbol. */
5011 if ((type & N_TYPE) == N_TEXT
5013 symsec = obj_textsec (input_bfd);
5014 else if ((type & N_TYPE) == N_DATA
5016 symsec = obj_datasec (input_bfd);
5017 else if ((type & N_TYPE) == N_BSS
5019 symsec = obj_bsssec (input_bfd);
5020 else if ((type & N_TYPE) == N_ABS
5022 symsec = bfd_abs_section_ptr;
5023 else if (((type & N_TYPE) == N_INDR
5024 && (hresolve == NULL
5025 || (hresolve->root.type != bfd_link_hash_defined
5026 && hresolve->root.type != bfd_link_hash_defweak
5027 && hresolve->root.type != bfd_link_hash_common)))
5028 || type == N_WARNING)
5030 /* Pass the next symbol through unchanged. The
5031 condition above for indirect symbols is so that if
5032 the indirect symbol was defined, we output it with
5033 the correct definition so the debugger will
5036 val = GET_WORD (input_bfd, sym->e_value);
5039 else if ((type & N_STAB) != 0)
5041 val = GET_WORD (input_bfd, sym->e_value);
5046 /* If we get here with an indirect symbol, it means that
5047 we are outputting it with a real definition. In such
5048 a case we do not want to output the next symbol,
5049 which is the target of the indirection. */
5050 if ((type & N_TYPE) == N_INDR)
5055 /* We need to get the value from the hash table. We use
5056 hresolve so that if we have defined an indirect
5057 symbol we output the final definition. */
5060 switch (type & N_TYPE)
5063 symsec = obj_textsec (input_bfd);
5066 symsec = obj_datasec (input_bfd);
5069 symsec = obj_bsssec (input_bfd);
5072 symsec = bfd_abs_section_ptr;
5079 else if (hresolve->root.type == bfd_link_hash_defined
5080 || hresolve->root.type == bfd_link_hash_defweak)
5082 asection *input_section;
5083 asection *output_section;
5085 /* This case usually means a common symbol which was
5086 turned into a defined symbol. */
5087 input_section = hresolve->root.u.def.section;
5088 output_section = input_section->output_section;
5089 BFD_ASSERT (bfd_is_abs_section (output_section)
5090 || output_section->owner == output_bfd);
5091 val = (hresolve->root.u.def.value
5092 + bfd_get_section_vma (output_bfd, output_section)
5093 + input_section->output_offset);
5095 /* Get the correct type based on the section. If
5096 this is a constructed set, force it to be
5097 globally visible. */
5106 if (output_section == obj_textsec (output_bfd))
5107 type |= (hresolve->root.type == bfd_link_hash_defined
5110 else if (output_section == obj_datasec (output_bfd))
5111 type |= (hresolve->root.type == bfd_link_hash_defined
5114 else if (output_section == obj_bsssec (output_bfd))
5115 type |= (hresolve->root.type == bfd_link_hash_defined
5119 type |= (hresolve->root.type == bfd_link_hash_defined
5123 else if (hresolve->root.type == bfd_link_hash_common)
5124 val = hresolve->root.u.c.size;
5125 else if (hresolve->root.type == bfd_link_hash_undefweak)
5134 val = (symsec->output_section->vma
5135 + symsec->output_offset
5136 + (GET_WORD (input_bfd, sym->e_value)
5139 /* If this is a global symbol set the written flag, and if
5140 it is a local symbol see if we should discard it. */
5144 h->indx = obj_aout_external_sym_count (output_bfd);
5146 else if ((type & N_TYPE) != N_SETT
5147 && (type & N_TYPE) != N_SETD
5148 && (type & N_TYPE) != N_SETB
5149 && (type & N_TYPE) != N_SETA)
5154 case discard_sec_merge:
5157 if ((type & N_STAB) == 0
5158 && bfd_is_local_label_name (input_bfd, name))
5172 /* An N_BINCL symbol indicates the start of the stabs
5173 entries for a header file. We need to scan ahead to the
5174 next N_EINCL symbol, ignoring nesting, adding up all the
5175 characters in the symbol names, not including the file
5176 numbers in types (the first number after an open
5178 if (type == (int) N_BINCL)
5180 struct external_nlist *incl_sym;
5182 struct aout_link_includes_entry *incl_entry;
5183 struct aout_link_includes_totals *t;
5187 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5191 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5192 if (incl_type == (int) N_EINCL)
5198 else if (incl_type == (int) N_BINCL)
5204 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5205 for (; *s != '\0'; s++)
5210 /* Skip the file number. */
5212 while (ISDIGIT (*s))
5220 /* If we have already included a header file with the
5221 same value, then replace this one with an N_EXCL
5223 copy = (bfd_boolean) (! flaginfo->info->keep_memory);
5224 incl_entry = aout_link_includes_lookup (&flaginfo->includes,
5226 if (incl_entry == NULL)
5228 for (t = incl_entry->totals; t != NULL; t = t->next)
5229 if (t->total == val)
5233 /* This is the first time we have seen this header
5234 file with this set of stabs strings. */
5235 t = (struct aout_link_includes_totals *)
5236 bfd_hash_allocate (&flaginfo->includes.root,
5241 t->next = incl_entry->totals;
5242 incl_entry->totals = t;
5248 /* This is a duplicate header file. We must change
5249 it to be an N_EXCL entry, and mark all the
5250 included symbols to prevent outputting them. */
5251 type = (int) N_EXCL;
5254 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5256 incl_sym++, incl_map++)
5260 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5261 if (incl_type == (int) N_EINCL)
5270 else if (incl_type == (int) N_BINCL)
5279 /* Copy this symbol into the list of symbols we are going to
5281 H_PUT_8 (output_bfd, type, outsym->e_type);
5282 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5283 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5285 if (! flaginfo->info->keep_memory)
5287 /* name points into a string table which we are going to
5288 free. If there is a hash table entry, use that string.
5289 Otherwise, copy name into memory. */
5291 name = h->root.root.string;
5295 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
5297 if (strtab_index == (bfd_size_type) -1)
5299 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5300 PUT_WORD (output_bfd, val, outsym->e_value);
5301 *symbol_map = obj_aout_external_sym_count (output_bfd);
5302 ++obj_aout_external_sym_count (output_bfd);
5306 /* Write out the output symbols we have just constructed. */
5307 if (outsym > flaginfo->output_syms)
5309 bfd_size_type outsym_size;
5311 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0)
5313 outsym_size = outsym - flaginfo->output_syms;
5314 outsym_size *= EXTERNAL_NLIST_SIZE;
5315 if (bfd_bwrite ((void *) flaginfo->output_syms, outsym_size, output_bfd)
5318 flaginfo->symoff += outsym_size;
5324 /* Link an a.out input BFD into the output file. */
5327 aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd)
5329 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5331 /* If this is a dynamic object, it may need special handling. */
5332 if ((input_bfd->flags & DYNAMIC) != 0
5333 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5334 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5335 (flaginfo->info, input_bfd));
5337 /* Get the symbols. We probably have them already, unless
5338 flaginfo->info->keep_memory is FALSE. */
5339 if (! aout_get_external_symbols (input_bfd))
5342 /* Write out the symbols and get a map of the new indices. The map
5343 is placed into flaginfo->symbol_map. */
5344 if (! aout_link_write_symbols (flaginfo, input_bfd))
5347 /* Relocate and write out the sections. These functions use the
5348 symbol map created by aout_link_write_symbols. The linker_mark
5349 field will be set if these sections are to be included in the
5350 link, which will normally be the case. */
5351 if (obj_textsec (input_bfd)->linker_mark)
5353 if (! aout_link_input_section (flaginfo, input_bfd,
5354 obj_textsec (input_bfd),
5356 exec_hdr (input_bfd)->a_trsize))
5359 if (obj_datasec (input_bfd)->linker_mark)
5361 if (! aout_link_input_section (flaginfo, input_bfd,
5362 obj_datasec (input_bfd),
5364 exec_hdr (input_bfd)->a_drsize))
5368 /* If we are not keeping memory, we don't need the symbols any
5369 longer. We still need them if we are keeping memory, because the
5370 strings in the hash table point into them. */
5371 if (! flaginfo->info->keep_memory)
5373 if (! aout_link_free_symbols (input_bfd))
5380 /* Do the final link step. This is called on the output BFD. The
5381 INFO structure should point to a list of BFDs linked through the
5382 link.next field which can be used to find each BFD which takes part
5383 in the output. Also, each section in ABFD should point to a list
5384 of bfd_link_order structures which list all the input sections for
5385 the output section. */
5388 NAME (aout, final_link) (bfd *abfd,
5389 struct bfd_link_info *info,
5390 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5392 struct aout_final_link_info aout_info;
5393 bfd_boolean includes_hash_initialized = FALSE;
5395 bfd_size_type trsize, drsize;
5396 bfd_size_type max_contents_size;
5397 bfd_size_type max_relocs_size;
5398 bfd_size_type max_sym_count;
5399 struct bfd_link_order *p;
5401 bfd_boolean have_link_order_relocs;
5403 if (bfd_link_pic (info))
5404 abfd->flags |= DYNAMIC;
5406 aout_info.info = info;
5407 aout_info.output_bfd = abfd;
5408 aout_info.contents = NULL;
5409 aout_info.relocs = NULL;
5410 aout_info.symbol_map = NULL;
5411 aout_info.output_syms = NULL;
5413 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5414 aout_link_includes_newfunc,
5415 sizeof (struct aout_link_includes_entry),
5418 includes_hash_initialized = TRUE;
5420 /* Figure out the largest section size. Also, if generating
5421 relocatable output, count the relocs. */
5424 max_contents_size = 0;
5425 max_relocs_size = 0;
5427 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5431 if (bfd_link_relocatable (info))
5433 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5435 trsize += exec_hdr (sub)->a_trsize;
5436 drsize += exec_hdr (sub)->a_drsize;
5440 /* FIXME: We need to identify the .text and .data sections
5441 and call get_reloc_upper_bound and canonicalize_reloc to
5442 work out the number of relocs needed, and then multiply
5443 by the reloc size. */
5445 /* xgettext:c-format */
5446 (_("%pB: relocatable link from %s to %s not supported"),
5447 abfd, sub->xvec->name, abfd->xvec->name);
5448 bfd_set_error (bfd_error_invalid_operation);
5453 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5455 sz = obj_textsec (sub)->size;
5456 if (sz > max_contents_size)
5457 max_contents_size = sz;
5458 sz = obj_datasec (sub)->size;
5459 if (sz > max_contents_size)
5460 max_contents_size = sz;
5462 sz = exec_hdr (sub)->a_trsize;
5463 if (sz > max_relocs_size)
5464 max_relocs_size = sz;
5465 sz = exec_hdr (sub)->a_drsize;
5466 if (sz > max_relocs_size)
5467 max_relocs_size = sz;
5469 sz = obj_aout_external_sym_count (sub);
5470 if (sz > max_sym_count)
5475 if (bfd_link_relocatable (info))
5477 if (obj_textsec (abfd) != NULL)
5478 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5479 ->map_head.link_order)
5480 * obj_reloc_entry_size (abfd));
5481 if (obj_datasec (abfd) != NULL)
5482 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5483 ->map_head.link_order)
5484 * obj_reloc_entry_size (abfd));
5487 exec_hdr (abfd)->a_trsize = trsize;
5488 exec_hdr (abfd)->a_drsize = drsize;
5490 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5492 /* Adjust the section sizes and vmas according to the magic number.
5493 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5494 filepos for each section. */
5495 if (! NAME (aout, adjust_sizes_and_vmas) (abfd))
5498 /* The relocation and symbol file positions differ among a.out
5499 targets. We are passed a callback routine from the backend
5500 specific code to handle this.
5501 FIXME: At this point we do not know how much space the symbol
5502 table will require. This will not work for any (nonstandard)
5503 a.out target that needs to know the symbol table size before it
5504 can compute the relocation file positions. This may or may not
5505 be the case for the hp300hpux target, for example. */
5506 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5508 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5509 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5510 obj_sym_filepos (abfd) = aout_info.symoff;
5512 /* We keep a count of the symbols as we output them. */
5513 obj_aout_external_sym_count (abfd) = 0;
5515 /* We accumulate the string table as we write out the symbols. */
5516 aout_info.strtab = _bfd_stringtab_init ();
5517 if (aout_info.strtab == NULL)
5520 /* Allocate buffers to hold section contents and relocs. */
5521 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
5522 aout_info.relocs = bfd_malloc (max_relocs_size);
5523 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int));
5524 aout_info.output_syms = (struct external_nlist *)
5525 bfd_malloc ((max_sym_count + 1) * sizeof (struct external_nlist));
5526 if ((aout_info.contents == NULL && max_contents_size != 0)
5527 || (aout_info.relocs == NULL && max_relocs_size != 0)
5528 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5529 || aout_info.output_syms == NULL)
5532 /* If we have a symbol named __DYNAMIC, force it out now. This is
5533 required by SunOS. Doing this here rather than in sunos.c is a
5534 hack, but it's easier than exporting everything which would be
5537 struct aout_link_hash_entry *h;
5539 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5540 FALSE, FALSE, FALSE);
5542 aout_link_write_other_symbol (&h->root.root, &aout_info);
5545 /* The most time efficient way to do the link would be to read all
5546 the input object files into memory and then sort out the
5547 information into the output file. Unfortunately, that will
5548 probably use too much memory. Another method would be to step
5549 through everything that composes the text section and write it
5550 out, and then everything that composes the data section and write
5551 it out, and then write out the relocs, and then write out the
5552 symbols. Unfortunately, that requires reading stuff from each
5553 input file several times, and we will not be able to keep all the
5554 input files open simultaneously, and reopening them will be slow.
5556 What we do is basically process one input file at a time. We do
5557 everything we need to do with an input file once--copy over the
5558 section contents, handle the relocation information, and write
5559 out the symbols--and then we throw away the information we read
5560 from it. This approach requires a lot of lseeks of the output
5561 file, which is unfortunate but still faster than reopening a lot
5564 We use the output_has_begun field of the input BFDs to see
5565 whether we have already handled it. */
5566 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5567 sub->output_has_begun = FALSE;
5569 /* Mark all sections which are to be included in the link. This
5570 will normally be every section. We need to do this so that we
5571 can identify any sections which the linker has decided to not
5573 for (o = abfd->sections; o != NULL; o = o->next)
5575 for (p = o->map_head.link_order; p != NULL; p = p->next)
5576 if (p->type == bfd_indirect_link_order)
5577 p->u.indirect.section->linker_mark = TRUE;
5580 have_link_order_relocs = FALSE;
5581 for (o = abfd->sections; o != NULL; o = o->next)
5583 for (p = o->map_head.link_order;
5587 if (p->type == bfd_indirect_link_order
5588 && (bfd_get_flavour (p->u.indirect.section->owner)
5589 == bfd_target_aout_flavour))
5593 input_bfd = p->u.indirect.section->owner;
5594 if (! input_bfd->output_has_begun)
5596 if (! aout_link_input_bfd (&aout_info, input_bfd))
5598 input_bfd->output_has_begun = TRUE;
5601 else if (p->type == bfd_section_reloc_link_order
5602 || p->type == bfd_symbol_reloc_link_order)
5604 /* These are handled below. */
5605 have_link_order_relocs = TRUE;
5609 if (! _bfd_default_link_order (abfd, info, o, p))
5615 /* Write out any symbols that we have not already written out. */
5616 bfd_hash_traverse (&info->hash->table,
5617 aout_link_write_other_symbol,
5620 /* Now handle any relocs we were asked to create by the linker.
5621 These did not come from any input file. We must do these after
5622 we have written out all the symbols, so that we know the symbol
5624 if (have_link_order_relocs)
5626 for (o = abfd->sections; o != NULL; o = o->next)
5628 for (p = o->map_head.link_order;
5632 if (p->type == bfd_section_reloc_link_order
5633 || p->type == bfd_symbol_reloc_link_order)
5635 if (! aout_link_reloc_link_order (&aout_info, o, p))
5642 if (aout_info.contents != NULL)
5644 free (aout_info.contents);
5645 aout_info.contents = NULL;
5647 if (aout_info.relocs != NULL)
5649 free (aout_info.relocs);
5650 aout_info.relocs = NULL;
5652 if (aout_info.symbol_map != NULL)
5654 free (aout_info.symbol_map);
5655 aout_info.symbol_map = NULL;
5657 if (aout_info.output_syms != NULL)
5659 free (aout_info.output_syms);
5660 aout_info.output_syms = NULL;
5662 if (includes_hash_initialized)
5664 bfd_hash_table_free (&aout_info.includes.root);
5665 includes_hash_initialized = FALSE;
5668 /* Finish up any dynamic linking we may be doing. */
5669 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5671 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5675 /* Update the header information. */
5676 abfd->symcount = obj_aout_external_sym_count (abfd);
5677 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5678 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5679 obj_textsec (abfd)->reloc_count =
5680 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5681 obj_datasec (abfd)->reloc_count =
5682 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5684 /* Write out the string table, unless there are no symbols. */
5685 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
5687 if (abfd->symcount > 0)
5689 if (!emit_stringtab (abfd, aout_info.strtab))
5694 bfd_byte b[BYTES_IN_WORD];
5696 memset (b, 0, BYTES_IN_WORD);
5697 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
5704 if (aout_info.contents != NULL)
5705 free (aout_info.contents);
5706 if (aout_info.relocs != NULL)
5707 free (aout_info.relocs);
5708 if (aout_info.symbol_map != NULL)
5709 free (aout_info.symbol_map);
5710 if (aout_info.output_syms != NULL)
5711 free (aout_info.output_syms);
5712 if (includes_hash_initialized)
5713 bfd_hash_table_free (&aout_info.includes.root);