1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2014 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sparc_aout_sunos_be_vec
72 requires all the names from @file{aout32.c}, and produces the jump vector
74 | sparc_aout_sunos_be_vec
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
86 When porting it to run on a new system, you must supply:
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected. */
110 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
111 Doesn't matter what the setting of WP_TEXT is on output, but it'll
113 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
114 * Any BFD with both flags clear is OMAGIC.
115 (Just want to make these explicit, so the conditions tested in this
116 file make sense if you're more familiar with a.out than with BFD.) */
118 #define KEEPIT udata.i
122 #include "safe-ctype.h"
127 #include "aout/aout64.h"
128 #include "aout/stab_gnu.h"
136 The file @file{aoutx.h} provides for both the @emph{standard}
137 and @emph{extended} forms of a.out relocation records.
139 The standard records contain only an
140 address, a symbol index, and a type field. The extended records
141 (used on 29ks and sparcs) also have a full integer for an
144 #ifndef CTOR_TABLE_RELOC_HOWTO
145 #define CTOR_TABLE_RELOC_IDX 2
146 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
147 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
148 ? howto_table_ext : howto_table_std) \
149 + CTOR_TABLE_RELOC_IDX)
152 #ifndef MY_swap_std_reloc_in
153 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
156 #ifndef MY_swap_ext_reloc_in
157 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
160 #ifndef MY_swap_std_reloc_out
161 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
164 #ifndef MY_swap_ext_reloc_out
165 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
168 #ifndef MY_final_link_relocate
169 #define MY_final_link_relocate _bfd_final_link_relocate
172 #ifndef MY_relocate_contents
173 #define MY_relocate_contents _bfd_relocate_contents
176 #define howto_table_ext NAME (aout, ext_howto_table)
177 #define howto_table_std NAME (aout, std_howto_table)
179 reloc_howto_type howto_table_ext[] =
181 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
182 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE),
183 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE),
184 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE),
185 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE),
186 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE),
187 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE),
188 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE),
189 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE),
190 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE),
191 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE),
192 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE),
193 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE),
194 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE),
195 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE),
196 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE),
197 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE),
198 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE),
199 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE),
200 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE),
201 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE),
202 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE),
203 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE),
204 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE),
205 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE),
206 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
207 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
208 #define RELOC_SPARC_REV32 RELOC_WDISP19
209 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE),
212 /* Convert standard reloc records to "arelent" format (incl byte swap). */
214 reloc_howto_type howto_table_std[] =
216 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
217 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
218 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
219 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
220 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
221 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
222 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
223 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
224 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
225 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
226 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
227 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
233 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
249 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
257 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
260 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
263 NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
265 #define EXT(i, j) case i: return & howto_table_ext [j]
266 #define STD(i, j) case i: return & howto_table_std [j]
267 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
269 if (code == BFD_RELOC_CTOR)
270 switch (bfd_arch_bits_per_address (abfd))
283 EXT (BFD_RELOC_8, 0);
284 EXT (BFD_RELOC_16, 1);
285 EXT (BFD_RELOC_32, 2);
286 EXT (BFD_RELOC_HI22, 8);
287 EXT (BFD_RELOC_LO10, 11);
288 EXT (BFD_RELOC_32_PCREL_S2, 6);
289 EXT (BFD_RELOC_SPARC_WDISP22, 7);
290 EXT (BFD_RELOC_SPARC13, 10);
291 EXT (BFD_RELOC_SPARC_GOT10, 14);
292 EXT (BFD_RELOC_SPARC_BASE13, 15);
293 EXT (BFD_RELOC_SPARC_GOT13, 15);
294 EXT (BFD_RELOC_SPARC_GOT22, 16);
295 EXT (BFD_RELOC_SPARC_PC10, 17);
296 EXT (BFD_RELOC_SPARC_PC22, 18);
297 EXT (BFD_RELOC_SPARC_WPLT30, 19);
298 EXT (BFD_RELOC_SPARC_REV32, 26);
306 STD (BFD_RELOC_8, 0);
307 STD (BFD_RELOC_16, 1);
308 STD (BFD_RELOC_32, 2);
309 STD (BFD_RELOC_8_PCREL, 4);
310 STD (BFD_RELOC_16_PCREL, 5);
311 STD (BFD_RELOC_32_PCREL, 6);
312 STD (BFD_RELOC_16_BASEREL, 9);
313 STD (BFD_RELOC_32_BASEREL, 10);
320 NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name)
322 unsigned int i, size;
323 reloc_howto_type *howto_table;
325 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE)
327 howto_table = howto_table_ext;
328 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]);
332 howto_table = howto_table_std;
333 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]);
336 for (i = 0; i < size; i++)
337 if (howto_table[i].name != NULL
338 && strcasecmp (howto_table[i].name, r_name) == 0)
339 return &howto_table[i];
346 Internal entry points
349 @file{aoutx.h} exports several routines for accessing the
350 contents of an a.out file, which are gathered and exported in
351 turn by various format specific files (eg sunos.c).
356 aout_@var{size}_swap_exec_header_in
359 void aout_@var{size}_swap_exec_header_in,
361 struct external_exec *bytes,
362 struct internal_exec *execp);
365 Swap the information in an executable header @var{raw_bytes} taken
366 from a raw byte stream memory image into the internal exec header
367 structure @var{execp}.
370 #ifndef NAME_swap_exec_header_in
372 NAME (aout, swap_exec_header_in) (bfd *abfd,
373 struct external_exec *bytes,
374 struct internal_exec *execp)
376 /* The internal_exec structure has some fields that are unused in this
377 configuration (IE for i960), so ensure that all such uninitialized
378 fields are zero'd out. There are places where two of these structs
379 are memcmp'd, and thus the contents do matter. */
380 memset ((void *) execp, 0, sizeof (struct internal_exec));
381 /* Now fill in fields in the execp, from the bytes in the raw data. */
382 execp->a_info = H_GET_32 (abfd, bytes->e_info);
383 execp->a_text = GET_WORD (abfd, bytes->e_text);
384 execp->a_data = GET_WORD (abfd, bytes->e_data);
385 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
386 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
387 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
388 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
389 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
391 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
396 aout_@var{size}_swap_exec_header_out
399 void aout_@var{size}_swap_exec_header_out
401 struct internal_exec *execp,
402 struct external_exec *raw_bytes);
405 Swap the information in an internal exec header structure
406 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
409 NAME (aout, swap_exec_header_out) (bfd *abfd,
410 struct internal_exec *execp,
411 struct external_exec *bytes)
413 /* Now fill in fields in the raw data, from the fields in the exec struct. */
414 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
415 PUT_WORD (abfd, execp->a_text , bytes->e_text);
416 PUT_WORD (abfd, execp->a_data , bytes->e_data);
417 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
418 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
419 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
420 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
421 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
424 /* Make all the section for an a.out file. */
427 NAME (aout, make_sections) (bfd *abfd)
429 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL)
431 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL)
433 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL)
440 aout_@var{size}_some_aout_object_p
443 const bfd_target *aout_@var{size}_some_aout_object_p
445 struct internal_exec *execp,
446 const bfd_target *(*callback_to_real_object_p) (bfd *));
449 Some a.out variant thinks that the file open in @var{abfd}
450 checking is an a.out file. Do some more checking, and set up
451 for access if it really is. Call back to the calling
452 environment's "finish up" function just before returning, to
453 handle any last-minute setup.
457 NAME (aout, some_aout_object_p) (bfd *abfd,
458 struct internal_exec *execp,
459 const bfd_target *(*callback_to_real_object_p) (bfd *))
461 struct aout_data_struct *rawptr, *oldrawptr;
462 const bfd_target *result;
463 bfd_size_type amt = sizeof (* rawptr);
465 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
469 oldrawptr = abfd->tdata.aout_data;
470 abfd->tdata.aout_data = rawptr;
472 /* Copy the contents of the old tdata struct.
473 In particular, we want the subformat, since for hpux it was set in
474 hp300hpux.c:swap_exec_header_in and will be used in
475 hp300hpux.c:callback. */
476 if (oldrawptr != NULL)
477 *abfd->tdata.aout_data = *oldrawptr;
479 abfd->tdata.aout_data->a.hdr = &rawptr->e;
480 /* Copy in the internal_exec struct. */
481 *(abfd->tdata.aout_data->a.hdr) = *execp;
482 execp = abfd->tdata.aout_data->a.hdr;
484 /* Set the file flags. */
485 abfd->flags = BFD_NO_FLAGS;
486 if (execp->a_drsize || execp->a_trsize)
487 abfd->flags |= HAS_RELOC;
488 /* Setting of EXEC_P has been deferred to the bottom of this function. */
490 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
491 if (N_DYNAMIC (*execp))
492 abfd->flags |= DYNAMIC;
494 if (N_MAGIC (*execp) == ZMAGIC)
496 abfd->flags |= D_PAGED | WP_TEXT;
497 adata (abfd).magic = z_magic;
499 else if (N_MAGIC (*execp) == QMAGIC)
501 abfd->flags |= D_PAGED | WP_TEXT;
502 adata (abfd).magic = z_magic;
503 adata (abfd).subformat = q_magic_format;
505 else if (N_MAGIC (*execp) == NMAGIC)
507 abfd->flags |= WP_TEXT;
508 adata (abfd).magic = n_magic;
510 else if (N_MAGIC (*execp) == OMAGIC
511 || N_MAGIC (*execp) == BMAGIC)
512 adata (abfd).magic = o_magic;
514 /* Should have been checked with N_BADMAG before this routine
518 bfd_get_start_address (abfd) = execp->a_entry;
520 obj_aout_symbols (abfd) = NULL;
521 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
523 /* The default relocation entry size is that of traditional V7 Unix. */
524 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
526 /* The default symbol entry size is that of traditional Unix. */
527 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
530 bfd_init_window (&obj_aout_sym_window (abfd));
531 bfd_init_window (&obj_aout_string_window (abfd));
533 obj_aout_external_syms (abfd) = NULL;
534 obj_aout_external_strings (abfd) = NULL;
535 obj_aout_sym_hashes (abfd) = NULL;
537 if (! NAME (aout, make_sections) (abfd))
540 obj_datasec (abfd)->size = execp->a_data;
541 obj_bsssec (abfd)->size = execp->a_bss;
543 obj_textsec (abfd)->flags =
544 (execp->a_trsize != 0
545 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
546 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
547 obj_datasec (abfd)->flags =
548 (execp->a_drsize != 0
549 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
550 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
551 obj_bsssec (abfd)->flags = SEC_ALLOC;
553 #ifdef THIS_IS_ONLY_DOCUMENTATION
554 /* The common code can't fill in these things because they depend
555 on either the start address of the text segment, the rounding
556 up of virtual addresses between segments, or the starting file
557 position of the text segment -- all of which varies among different
558 versions of a.out. */
560 /* Call back to the format-dependent code to fill in the rest of the
561 fields and do any further cleanup. Things that should be filled
562 in by the callback: */
564 struct exec *execp = exec_hdr (abfd);
566 obj_textsec (abfd)->size = N_TXTSIZE (*execp);
567 /* Data and bss are already filled in since they're so standard. */
569 /* The virtual memory addresses of the sections. */
570 obj_textsec (abfd)->vma = N_TXTADDR (*execp);
571 obj_datasec (abfd)->vma = N_DATADDR (*execp);
572 obj_bsssec (abfd)->vma = N_BSSADDR (*execp);
574 /* The file offsets of the sections. */
575 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
576 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
578 /* The file offsets of the relocation info. */
579 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp);
580 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp);
582 /* The file offsets of the string table and symbol table. */
583 obj_str_filepos (abfd) = N_STROFF (*execp);
584 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
586 /* Determine the architecture and machine type of the object file. */
587 switch (N_MACHTYPE (*exec_hdr (abfd)))
590 abfd->obj_arch = bfd_arch_obscure;
594 adata (abfd)->page_size = TARGET_PAGE_SIZE;
595 adata (abfd)->segment_size = SEGMENT_SIZE;
596 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
600 /* The architecture is encoded in various ways in various a.out variants,
601 or is not encoded at all in some of them. The relocation size depends
602 on the architecture and the a.out variant. Finally, the return value
603 is the bfd_target vector in use. If an error occurs, return zero and
604 set bfd_error to the appropriate error code.
606 Formats such as b.out, which have additional fields in the a.out
607 header, should cope with them in this callback as well. */
608 #endif /* DOCUMENTATION */
610 result = (*callback_to_real_object_p) (abfd);
612 /* Now that the segment addresses have been worked out, take a better
613 guess at whether the file is executable. If the entry point
614 is within the text segment, assume it is. (This makes files
615 executable even if their entry point address is 0, as long as
616 their text starts at zero.).
618 This test had to be changed to deal with systems where the text segment
619 runs at a different location than the default. The problem is that the
620 entry address can appear to be outside the text segment, thus causing an
621 erroneous conclusion that the file isn't executable.
623 To fix this, we now accept any non-zero entry point as an indication of
624 executability. This will work most of the time, since only the linker
625 sets the entry point, and that is likely to be non-zero for most systems. */
627 if (execp->a_entry != 0
628 || (execp->a_entry >= obj_textsec (abfd)->vma
629 && execp->a_entry < (obj_textsec (abfd)->vma
630 + obj_textsec (abfd)->size)
631 && execp->a_trsize == 0
632 && execp->a_drsize == 0))
633 abfd->flags |= EXEC_P;
637 struct stat stat_buf;
639 /* The original heuristic doesn't work in some important cases.
640 The a.out file has no information about the text start
641 address. For files (like kernels) linked to non-standard
642 addresses (ld -Ttext nnn) the entry point may not be between
643 the default text start (obj_textsec(abfd)->vma) and
644 (obj_textsec(abfd)->vma) + text size. This is not just a mach
645 issue. Many kernels are loaded at non standard addresses. */
646 if (abfd->iostream != NULL
647 && (abfd->flags & BFD_IN_MEMORY) == 0
648 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
649 && ((stat_buf.st_mode & 0111) != 0))
650 abfd->flags |= EXEC_P;
652 #endif /* STAT_FOR_EXEC */
658 bfd_release (abfd, rawptr);
659 abfd->tdata.aout_data = oldrawptr;
665 aout_@var{size}_mkobject
668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
671 Initialize BFD @var{abfd} for use with a.out files.
675 NAME (aout, mkobject) (bfd *abfd)
677 struct aout_data_struct *rawptr;
678 bfd_size_type amt = sizeof (* rawptr);
680 bfd_set_error (bfd_error_system_call);
682 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
686 abfd->tdata.aout_data = rawptr;
687 exec_hdr (abfd) = &(rawptr->e);
689 obj_textsec (abfd) = NULL;
690 obj_datasec (abfd) = NULL;
691 obj_bsssec (abfd) = NULL;
698 aout_@var{size}_machine_type
701 enum machine_type aout_@var{size}_machine_type
702 (enum bfd_architecture arch,
703 unsigned long machine,
704 bfd_boolean *unknown);
707 Keep track of machine architecture and machine type for
708 a.out's. Return the <<machine_type>> for a particular
709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
710 and machine can't be represented in a.out format.
712 If the architecture is understood, machine type 0 (default)
713 is always understood.
717 NAME (aout, machine_type) (enum bfd_architecture arch,
718 unsigned long machine,
719 bfd_boolean *unknown)
721 enum machine_type arch_flags;
723 arch_flags = M_UNKNOWN;
730 || machine == bfd_mach_sparc
731 || machine == bfd_mach_sparc_sparclite
732 || machine == bfd_mach_sparc_sparclite_le
733 || machine == bfd_mach_sparc_v8plus
734 || machine == bfd_mach_sparc_v8plusa
735 || machine == bfd_mach_sparc_v8plusb
736 || machine == bfd_mach_sparc_v9
737 || machine == bfd_mach_sparc_v9a
738 || machine == bfd_mach_sparc_v9b)
739 arch_flags = M_SPARC;
740 else if (machine == bfd_mach_sparc_sparclet)
741 arch_flags = M_SPARCLET;
747 case 0: arch_flags = M_68010; break;
748 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break;
749 case bfd_mach_m68010: arch_flags = M_68010; break;
750 case bfd_mach_m68020: arch_flags = M_68020; break;
751 default: arch_flags = M_UNKNOWN; break;
757 || machine == bfd_mach_i386_i386
758 || machine == bfd_mach_i386_i386_intel_syntax)
771 case bfd_mach_mips3000:
772 case bfd_mach_mips3900:
773 arch_flags = M_MIPS1;
775 case bfd_mach_mips6000:
776 arch_flags = M_MIPS2;
778 case bfd_mach_mips4000:
779 case bfd_mach_mips4010:
780 case bfd_mach_mips4100:
781 case bfd_mach_mips4300:
782 case bfd_mach_mips4400:
783 case bfd_mach_mips4600:
784 case bfd_mach_mips4650:
785 case bfd_mach_mips8000:
786 case bfd_mach_mips9000:
787 case bfd_mach_mips10000:
788 case bfd_mach_mips12000:
789 case bfd_mach_mips14000:
790 case bfd_mach_mips16000:
791 case bfd_mach_mips16:
792 case bfd_mach_mipsisa32:
793 case bfd_mach_mipsisa32r2:
794 case bfd_mach_mipsisa32r3:
795 case bfd_mach_mipsisa32r5:
796 case bfd_mach_mipsisa32r6:
798 case bfd_mach_mipsisa64:
799 case bfd_mach_mipsisa64r2:
800 case bfd_mach_mipsisa64r3:
801 case bfd_mach_mipsisa64r5:
802 case bfd_mach_mipsisa64r6:
803 case bfd_mach_mips_sb1:
804 case bfd_mach_mips_xlr:
805 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
806 arch_flags = M_MIPS2;
809 arch_flags = M_UNKNOWN;
817 case 0: arch_flags = M_NS32532; break;
818 case 32032: arch_flags = M_NS32032; break;
819 case 32532: arch_flags = M_NS32532; break;
820 default: arch_flags = M_UNKNOWN; break;
829 if (machine == 0 || machine == 255)
838 arch_flags = M_UNKNOWN;
841 if (arch_flags != M_UNKNOWN)
849 aout_@var{size}_set_arch_mach
852 bfd_boolean aout_@var{size}_set_arch_mach,
854 enum bfd_architecture arch,
855 unsigned long machine);
858 Set the architecture and the machine of the BFD @var{abfd} to the
859 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
860 can support the architecture required.
864 NAME (aout, set_arch_mach) (bfd *abfd,
865 enum bfd_architecture arch,
866 unsigned long machine)
868 if (! bfd_default_set_arch_mach (abfd, arch, machine))
871 if (arch != bfd_arch_unknown)
875 NAME (aout, machine_type) (arch, machine, &unknown);
880 /* Determine the size of a relocation entry. */
885 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
888 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
892 return (*aout_backend_info (abfd)->set_sizes) (abfd);
896 adjust_o_magic (bfd *abfd, struct internal_exec *execp)
898 file_ptr pos = adata (abfd).exec_bytes_size;
903 obj_textsec (abfd)->filepos = pos;
904 if (!obj_textsec (abfd)->user_set_vma)
905 obj_textsec (abfd)->vma = vma;
907 vma = obj_textsec (abfd)->vma;
909 pos += obj_textsec (abfd)->size;
910 vma += obj_textsec (abfd)->size;
913 if (!obj_datasec (abfd)->user_set_vma)
915 obj_textsec (abfd)->size += pad;
918 obj_datasec (abfd)->vma = vma;
921 vma = obj_datasec (abfd)->vma;
922 obj_datasec (abfd)->filepos = pos;
923 pos += obj_datasec (abfd)->size;
924 vma += obj_datasec (abfd)->size;
927 if (!obj_bsssec (abfd)->user_set_vma)
929 obj_datasec (abfd)->size += pad;
932 obj_bsssec (abfd)->vma = vma;
936 /* The VMA of the .bss section is set by the VMA of the
937 .data section plus the size of the .data section. We may
938 need to add padding bytes to make this true. */
939 pad = obj_bsssec (abfd)->vma - vma;
942 obj_datasec (abfd)->size += pad;
946 obj_bsssec (abfd)->filepos = pos;
948 /* Fix up the exec header. */
949 execp->a_text = obj_textsec (abfd)->size;
950 execp->a_data = obj_datasec (abfd)->size;
951 execp->a_bss = obj_bsssec (abfd)->size;
952 N_SET_MAGIC (*execp, OMAGIC);
956 adjust_z_magic (bfd *abfd, struct internal_exec *execp)
958 bfd_size_type data_pad, text_pad;
960 const struct aout_backend_data *abdp;
961 /* TRUE if text includes exec header. */
964 abdp = aout_backend_info (abfd);
968 && (abdp->text_includes_header
969 || obj_aout_subformat (abfd) == q_magic_format));
970 obj_textsec (abfd)->filepos = (ztih
971 ? adata (abfd).exec_bytes_size
972 : adata (abfd).zmagic_disk_block_size);
973 if (! obj_textsec (abfd)->user_set_vma)
975 /* ?? Do we really need to check for relocs here? */
976 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
979 ? (abdp->default_text_vma
980 + adata (abfd).exec_bytes_size)
981 : abdp->default_text_vma));
986 /* The .text section is being loaded at an unusual address. We
987 may need to pad it such that the .data section starts at a page
990 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
991 & (adata (abfd).page_size - 1));
993 text_pad = ((- obj_textsec (abfd)->vma)
994 & (adata (abfd).page_size - 1));
997 /* Find start of data. */
1000 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size;
1001 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1005 /* Note that if page_size == zmagic_disk_block_size, then
1006 filepos == page_size, and this case is the same as the ztih
1008 text_end = obj_textsec (abfd)->size;
1009 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1010 text_end += obj_textsec (abfd)->filepos;
1012 obj_textsec (abfd)->size += text_pad;
1013 text_end += text_pad;
1016 if (!obj_datasec (abfd)->user_set_vma)
1019 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size;
1020 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1022 if (abdp && abdp->zmagic_mapped_contiguous)
1024 asection * text = obj_textsec (abfd);
1025 asection * data = obj_datasec (abfd);
1027 text_pad = data->vma - (text->vma + text->size);
1028 /* Only pad the text section if the data
1029 section is going to be placed after it. */
1031 text->size += text_pad;
1033 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1034 + obj_textsec (abfd)->size);
1036 /* Fix up exec header while we're at it. */
1037 execp->a_text = obj_textsec (abfd)->size;
1038 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1039 execp->a_text += adata (abfd).exec_bytes_size;
1040 if (obj_aout_subformat (abfd) == q_magic_format)
1041 N_SET_MAGIC (*execp, QMAGIC);
1043 N_SET_MAGIC (*execp, ZMAGIC);
1045 /* Spec says data section should be rounded up to page boundary. */
1046 obj_datasec (abfd)->size
1047 = align_power (obj_datasec (abfd)->size,
1048 obj_bsssec (abfd)->alignment_power);
1049 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size,
1050 adata (abfd).page_size);
1051 data_pad = execp->a_data - obj_datasec (abfd)->size;
1054 if (!obj_bsssec (abfd)->user_set_vma)
1055 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1056 + obj_datasec (abfd)->size);
1057 /* If the BSS immediately follows the data section and extra space
1058 in the page is left after the data section, fudge data
1059 in the header so that the bss section looks smaller by that
1060 amount. We'll start the bss section there, and lie to the OS.
1061 (Note that a linker script, as well as the above assignment,
1062 could have explicitly set the BSS vma to immediately follow
1063 the data section.) */
1064 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1065 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size)
1066 execp->a_bss = (data_pad > obj_bsssec (abfd)->size
1067 ? 0 : obj_bsssec (abfd)->size - data_pad);
1069 execp->a_bss = obj_bsssec (abfd)->size;
1073 adjust_n_magic (bfd *abfd, struct internal_exec *execp)
1075 file_ptr pos = adata (abfd).exec_bytes_size;
1080 obj_textsec (abfd)->filepos = pos;
1081 if (!obj_textsec (abfd)->user_set_vma)
1082 obj_textsec (abfd)->vma = vma;
1084 vma = obj_textsec (abfd)->vma;
1085 pos += obj_textsec (abfd)->size;
1086 vma += obj_textsec (abfd)->size;
1089 obj_datasec (abfd)->filepos = pos;
1090 if (!obj_datasec (abfd)->user_set_vma)
1091 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1092 vma = obj_datasec (abfd)->vma;
1094 /* Since BSS follows data immediately, see if it needs alignment. */
1095 vma += obj_datasec (abfd)->size;
1096 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1097 obj_datasec (abfd)->size += pad;
1098 pos += obj_datasec (abfd)->size;
1101 if (!obj_bsssec (abfd)->user_set_vma)
1102 obj_bsssec (abfd)->vma = vma;
1104 vma = obj_bsssec (abfd)->vma;
1106 /* Fix up exec header. */
1107 execp->a_text = obj_textsec (abfd)->size;
1108 execp->a_data = obj_datasec (abfd)->size;
1109 execp->a_bss = obj_bsssec (abfd)->size;
1110 N_SET_MAGIC (*execp, NMAGIC);
1114 NAME (aout, adjust_sizes_and_vmas) (bfd *abfd,
1115 bfd_size_type *text_size,
1116 file_ptr *text_end ATTRIBUTE_UNUSED)
1118 struct internal_exec *execp = exec_hdr (abfd);
1120 if (! NAME (aout, make_sections) (abfd))
1123 if (adata (abfd).magic != undecided_magic)
1126 obj_textsec (abfd)->size =
1127 align_power (obj_textsec (abfd)->size,
1128 obj_textsec (abfd)->alignment_power);
1130 *text_size = obj_textsec (abfd)->size;
1131 /* Rule (heuristic) for when to pad to a new page. Note that there
1132 are (at least) two ways demand-paged (ZMAGIC) files have been
1133 handled. Most Berkeley-based systems start the text segment at
1134 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1135 segment right after the exec header; the latter is counted in the
1136 text segment size, and is paged in by the kernel with the rest of
1139 /* This perhaps isn't the right way to do this, but made it simpler for me
1140 to understand enough to implement it. Better would probably be to go
1141 right from BFD flags to alignment/positioning characteristics. But the
1142 old code was sloppy enough about handling the flags, and had enough
1143 other magic, that it was a little hard for me to understand. I think
1144 I understand it better now, but I haven't time to do the cleanup this
1147 if (abfd->flags & D_PAGED)
1148 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1149 adata (abfd).magic = z_magic;
1150 else if (abfd->flags & WP_TEXT)
1151 adata (abfd).magic = n_magic;
1153 adata (abfd).magic = o_magic;
1155 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1157 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1159 switch (adata (abfd).magic)
1161 case n_magic: str = "NMAGIC"; break;
1162 case o_magic: str = "OMAGIC"; break;
1163 case z_magic: str = "ZMAGIC"; break;
1168 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1169 obj_textsec (abfd)->alignment_power,
1170 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1171 obj_datasec (abfd)->alignment_power,
1172 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size,
1173 obj_bsssec (abfd)->alignment_power);
1177 switch (adata (abfd).magic)
1180 adjust_o_magic (abfd, execp);
1183 adjust_z_magic (abfd, execp);
1186 adjust_n_magic (abfd, execp);
1192 #ifdef BFD_AOUT_DEBUG
1193 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1194 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1195 obj_textsec (abfd)->filepos,
1196 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1197 obj_datasec (abfd)->filepos,
1198 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size);
1206 aout_@var{size}_new_section_hook
1209 bfd_boolean aout_@var{size}_new_section_hook,
1214 Called by the BFD in response to a @code{bfd_make_section}
1218 NAME (aout, new_section_hook) (bfd *abfd, asection *newsect)
1220 /* Align to double at least. */
1221 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
1223 if (bfd_get_format (abfd) == bfd_object)
1225 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1227 obj_textsec (abfd)= newsect;
1228 newsect->target_index = N_TEXT;
1230 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1232 obj_datasec (abfd) = newsect;
1233 newsect->target_index = N_DATA;
1235 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1237 obj_bsssec (abfd) = newsect;
1238 newsect->target_index = N_BSS;
1242 /* We allow more than three sections internally. */
1243 return _bfd_generic_new_section_hook (abfd, newsect);
1247 NAME (aout, set_section_contents) (bfd *abfd,
1249 const void * location,
1251 bfd_size_type count)
1254 bfd_size_type text_size;
1256 if (! abfd->output_has_begun)
1258 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1262 if (section == obj_bsssec (abfd))
1264 bfd_set_error (bfd_error_no_contents);
1268 if (section != obj_textsec (abfd)
1269 && section != obj_datasec (abfd))
1271 if (aout_section_merge_with_text_p (abfd, section))
1272 section->filepos = obj_textsec (abfd)->filepos +
1273 (section->vma - obj_textsec (abfd)->vma);
1276 (*_bfd_error_handler)
1277 (_("%s: can not represent section `%s' in a.out object file format"),
1278 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1279 bfd_set_error (bfd_error_nonrepresentable_section);
1286 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1287 || bfd_bwrite (location, count, abfd) != count)
1294 /* Read the external symbols from an a.out file. */
1297 aout_get_external_symbols (bfd *abfd)
1299 if (obj_aout_external_syms (abfd) == NULL)
1301 bfd_size_type count;
1302 struct external_nlist *syms;
1304 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1306 return TRUE; /* Nothing to do. */
1309 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
1310 exec_hdr (abfd)->a_syms,
1311 &obj_aout_sym_window (abfd), TRUE))
1313 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1315 /* We allocate using malloc to make the values easy to free
1316 later on. If we put them on the objalloc it might not be
1317 possible to free them. */
1318 syms = (struct external_nlist *) bfd_malloc (count * EXTERNAL_NLIST_SIZE);
1324 amt = exec_hdr (abfd)->a_syms;
1325 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1326 || bfd_bread (syms, amt, abfd) != amt)
1334 obj_aout_external_syms (abfd) = syms;
1335 obj_aout_external_sym_count (abfd) = count;
1338 if (obj_aout_external_strings (abfd) == NULL
1339 && exec_hdr (abfd)->a_syms != 0)
1341 unsigned char string_chars[BYTES_IN_WORD];
1342 bfd_size_type stringsize;
1344 bfd_size_type amt = BYTES_IN_WORD;
1346 /* Get the size of the strings. */
1347 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1348 || bfd_bread ((void *) string_chars, amt, abfd) != amt)
1350 stringsize = GET_WORD (abfd, string_chars);
1353 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1354 &obj_aout_string_window (abfd), TRUE))
1356 strings = (char *) obj_aout_string_window (abfd).data;
1358 strings = (char *) bfd_malloc (stringsize + 1);
1359 if (strings == NULL)
1362 /* Skip space for the string count in the buffer for convenience
1363 when using indexes. */
1364 amt = stringsize - BYTES_IN_WORD;
1365 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1372 /* Ensure that a zero index yields an empty string. */
1375 strings[stringsize - 1] = 0;
1377 obj_aout_external_strings (abfd) = strings;
1378 obj_aout_external_string_size (abfd) = stringsize;
1384 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1385 and symbol->value fields of CACHE_PTR will be set from the a.out
1386 nlist structure. This function is responsible for setting
1387 symbol->flags and symbol->section, and adjusting symbol->value. */
1390 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1394 if ((cache_ptr->type & N_STAB) != 0
1395 || cache_ptr->type == N_FN)
1399 /* This is a debugging symbol. */
1400 cache_ptr->symbol.flags = BSF_DEBUGGING;
1402 /* Work out the symbol section. */
1403 switch (cache_ptr->type & N_TYPE)
1407 sec = obj_textsec (abfd);
1410 sec = obj_datasec (abfd);
1413 sec = obj_bsssec (abfd);
1417 sec = bfd_abs_section_ptr;
1421 cache_ptr->symbol.section = sec;
1422 cache_ptr->symbol.value -= sec->vma;
1427 /* Get the default visibility. This does not apply to all types, so
1428 we just hold it in a local variable to use if wanted. */
1429 if ((cache_ptr->type & N_EXT) == 0)
1430 visible = BSF_LOCAL;
1432 visible = BSF_GLOBAL;
1434 switch (cache_ptr->type)
1437 case N_ABS: case N_ABS | N_EXT:
1438 cache_ptr->symbol.section = bfd_abs_section_ptr;
1439 cache_ptr->symbol.flags = visible;
1442 case N_UNDF | N_EXT:
1443 if (cache_ptr->symbol.value != 0)
1445 /* This is a common symbol. */
1446 cache_ptr->symbol.flags = BSF_GLOBAL;
1447 cache_ptr->symbol.section = bfd_com_section_ptr;
1451 cache_ptr->symbol.flags = 0;
1452 cache_ptr->symbol.section = bfd_und_section_ptr;
1456 case N_TEXT: case N_TEXT | N_EXT:
1457 cache_ptr->symbol.section = obj_textsec (abfd);
1458 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1459 cache_ptr->symbol.flags = visible;
1462 /* N_SETV symbols used to represent set vectors placed in the
1463 data section. They are no longer generated. Theoretically,
1464 it was possible to extract the entries and combine them with
1465 new ones, although I don't know if that was ever actually
1466 done. Unless that feature is restored, treat them as data
1468 case N_SETV: case N_SETV | N_EXT:
1469 case N_DATA: case N_DATA | N_EXT:
1470 cache_ptr->symbol.section = obj_datasec (abfd);
1471 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1472 cache_ptr->symbol.flags = visible;
1475 case N_BSS: case N_BSS | N_EXT:
1476 cache_ptr->symbol.section = obj_bsssec (abfd);
1477 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1478 cache_ptr->symbol.flags = visible;
1481 case N_SETA: case N_SETA | N_EXT:
1482 case N_SETT: case N_SETT | N_EXT:
1483 case N_SETD: case N_SETD | N_EXT:
1484 case N_SETB: case N_SETB | N_EXT:
1486 /* This code is no longer needed. It used to be used to make
1487 the linker handle set symbols, but they are now handled in
1488 the add_symbols routine instead. */
1489 switch (cache_ptr->type & N_TYPE)
1492 cache_ptr->symbol.section = bfd_abs_section_ptr;
1495 cache_ptr->symbol.section = obj_textsec (abfd);
1498 cache_ptr->symbol.section = obj_datasec (abfd);
1501 cache_ptr->symbol.section = obj_bsssec (abfd);
1505 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1510 /* This symbol is the text of a warning message. The next
1511 symbol is the symbol to associate the warning with. If a
1512 reference is made to that symbol, a warning is issued. */
1513 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1514 cache_ptr->symbol.section = bfd_abs_section_ptr;
1517 case N_INDR: case N_INDR | N_EXT:
1518 /* An indirect symbol. This consists of two symbols in a row.
1519 The first symbol is the name of the indirection. The second
1520 symbol is the name of the target. A reference to the first
1521 symbol becomes a reference to the second. */
1522 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1523 cache_ptr->symbol.section = bfd_ind_section_ptr;
1527 cache_ptr->symbol.section = bfd_und_section_ptr;
1528 cache_ptr->symbol.flags = BSF_WEAK;
1532 cache_ptr->symbol.section = bfd_abs_section_ptr;
1533 cache_ptr->symbol.flags = BSF_WEAK;
1537 cache_ptr->symbol.section = obj_textsec (abfd);
1538 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1539 cache_ptr->symbol.flags = BSF_WEAK;
1543 cache_ptr->symbol.section = obj_datasec (abfd);
1544 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1545 cache_ptr->symbol.flags = BSF_WEAK;
1549 cache_ptr->symbol.section = obj_bsssec (abfd);
1550 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1551 cache_ptr->symbol.flags = BSF_WEAK;
1558 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1561 translate_to_native_sym_flags (bfd *abfd,
1563 struct external_nlist *sym_pointer)
1565 bfd_vma value = cache_ptr->value;
1569 /* Mask out any existing type bits in case copying from one section
1571 sym_pointer->e_type[0] &= ~N_TYPE;
1573 sec = bfd_get_section (cache_ptr);
1578 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1580 (*_bfd_error_handler)
1581 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1582 bfd_get_filename (abfd),
1583 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1584 bfd_set_error (bfd_error_nonrepresentable_section);
1588 if (sec->output_section != NULL)
1590 off = sec->output_offset;
1591 sec = sec->output_section;
1594 if (bfd_is_abs_section (sec))
1595 sym_pointer->e_type[0] |= N_ABS;
1596 else if (sec == obj_textsec (abfd))
1597 sym_pointer->e_type[0] |= N_TEXT;
1598 else if (sec == obj_datasec (abfd))
1599 sym_pointer->e_type[0] |= N_DATA;
1600 else if (sec == obj_bsssec (abfd))
1601 sym_pointer->e_type[0] |= N_BSS;
1602 else if (bfd_is_und_section (sec))
1603 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1604 else if (bfd_is_ind_section (sec))
1605 sym_pointer->e_type[0] = N_INDR;
1606 else if (bfd_is_com_section (sec))
1607 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1610 if (aout_section_merge_with_text_p (abfd, sec))
1611 sym_pointer->e_type[0] |= N_TEXT;
1614 (*_bfd_error_handler)
1615 (_("%s: can not represent section `%s' in a.out object file format"),
1616 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1617 bfd_set_error (bfd_error_nonrepresentable_section);
1622 /* Turn the symbol from section relative to absolute again. */
1623 value += sec->vma + off;
1625 if ((cache_ptr->flags & BSF_WARNING) != 0)
1626 sym_pointer->e_type[0] = N_WARNING;
1628 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1629 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1630 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1631 sym_pointer->e_type[0] |= N_EXT;
1632 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1633 sym_pointer->e_type[0] &= ~N_EXT;
1635 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1637 int type = ((aout_symbol_type *) cache_ptr)->type;
1641 case N_ABS: type = N_SETA; break;
1642 case N_TEXT: type = N_SETT; break;
1643 case N_DATA: type = N_SETD; break;
1644 case N_BSS: type = N_SETB; break;
1646 sym_pointer->e_type[0] = type;
1649 if ((cache_ptr->flags & BSF_WEAK) != 0)
1653 switch (sym_pointer->e_type[0] & N_TYPE)
1656 case N_ABS: type = N_WEAKA; break;
1657 case N_TEXT: type = N_WEAKT; break;
1658 case N_DATA: type = N_WEAKD; break;
1659 case N_BSS: type = N_WEAKB; break;
1660 case N_UNDF: type = N_WEAKU; break;
1662 sym_pointer->e_type[0] = type;
1665 PUT_WORD (abfd, value, sym_pointer->e_value);
1670 /* Native-level interface to symbols. */
1673 NAME (aout, make_empty_symbol) (bfd *abfd)
1675 bfd_size_type amt = sizeof (aout_symbol_type);
1677 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt);
1680 new_symbol->symbol.the_bfd = abfd;
1682 return &new_symbol->symbol;
1685 /* Translate a set of internal symbols into external symbols. */
1688 NAME (aout, translate_symbol_table) (bfd *abfd,
1689 aout_symbol_type *in,
1690 struct external_nlist *ext,
1691 bfd_size_type count,
1693 bfd_size_type strsize,
1694 bfd_boolean dynamic)
1696 struct external_nlist *ext_end;
1698 ext_end = ext + count;
1699 for (; ext < ext_end; ext++, in++)
1703 x = GET_WORD (abfd, ext->e_strx);
1704 in->symbol.the_bfd = abfd;
1706 /* For the normal symbols, the zero index points at the number
1707 of bytes in the string table but is to be interpreted as the
1708 null string. For the dynamic symbols, the number of bytes in
1709 the string table is stored in the __DYNAMIC structure and the
1710 zero index points at an actual string. */
1711 if (x == 0 && ! dynamic)
1712 in->symbol.name = "";
1713 else if (x < strsize)
1714 in->symbol.name = str + x;
1718 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1719 in->desc = H_GET_16 (abfd, ext->e_desc);
1720 in->other = H_GET_8 (abfd, ext->e_other);
1721 in->type = H_GET_8 (abfd, ext->e_type);
1722 in->symbol.udata.p = NULL;
1724 if (! translate_from_native_sym_flags (abfd, in))
1728 in->symbol.flags |= BSF_DYNAMIC;
1734 /* We read the symbols into a buffer, which is discarded when this
1735 function exits. We read the strings into a buffer large enough to
1736 hold them all plus all the cached symbol entries. */
1739 NAME (aout, slurp_symbol_table) (bfd *abfd)
1741 struct external_nlist *old_external_syms;
1742 aout_symbol_type *cached;
1743 bfd_size_type cached_size;
1745 /* If there's no work to be done, don't do any. */
1746 if (obj_aout_symbols (abfd) != NULL)
1749 old_external_syms = obj_aout_external_syms (abfd);
1751 if (! aout_get_external_symbols (abfd))
1754 cached_size = obj_aout_external_sym_count (abfd);
1755 if (cached_size == 0)
1756 return TRUE; /* Nothing to do. */
1758 cached_size *= sizeof (aout_symbol_type);
1759 if (cached_size >= (bfd_size_type) bfd_get_size (abfd))
1761 cached = (aout_symbol_type *) bfd_zmalloc (cached_size);
1765 /* Convert from external symbol information to internal. */
1766 if (! (NAME (aout, translate_symbol_table)
1768 obj_aout_external_syms (abfd),
1769 obj_aout_external_sym_count (abfd),
1770 obj_aout_external_strings (abfd),
1771 obj_aout_external_string_size (abfd),
1778 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1780 obj_aout_symbols (abfd) = cached;
1782 /* It is very likely that anybody who calls this function will not
1783 want the external symbol information, so if it was allocated
1784 because of our call to aout_get_external_symbols, we free it up
1785 right away to save space. */
1786 if (old_external_syms == NULL
1787 && obj_aout_external_syms (abfd) != NULL)
1790 bfd_free_window (&obj_aout_sym_window (abfd));
1792 free (obj_aout_external_syms (abfd));
1794 obj_aout_external_syms (abfd) = NULL;
1800 /* We use a hash table when writing out symbols so that we only write
1801 out a particular string once. This helps particularly when the
1802 linker writes out stabs debugging entries, because each different
1803 contributing object file tends to have many duplicate stabs
1806 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1807 if BFD_TRADITIONAL_FORMAT is set. */
1809 /* Get the index of a string in a strtab, adding it if it is not
1812 static inline bfd_size_type
1813 add_to_stringtab (bfd *abfd,
1814 struct bfd_strtab_hash *tab,
1819 bfd_size_type str_index;
1821 /* An index of 0 always means the empty string. */
1822 if (str == 0 || *str == '\0')
1825 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1826 doesn't understand a hashed string table. */
1828 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1831 str_index = _bfd_stringtab_add (tab, str, hash, copy);
1833 if (str_index != (bfd_size_type) -1)
1834 /* Add BYTES_IN_WORD to the return value to account for the
1835 space taken up by the string table size. */
1836 str_index += BYTES_IN_WORD;
1841 /* Write out a strtab. ABFD is already at the right location in the
1845 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1847 bfd_byte buffer[BYTES_IN_WORD];
1848 bfd_size_type amt = BYTES_IN_WORD;
1850 /* The string table starts with the size. */
1851 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1852 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1855 return _bfd_stringtab_emit (abfd, tab);
1859 NAME (aout, write_syms) (bfd *abfd)
1861 unsigned int count ;
1862 asymbol **generic = bfd_get_outsymbols (abfd);
1863 struct bfd_strtab_hash *strtab;
1865 strtab = _bfd_stringtab_init ();
1869 for (count = 0; count < bfd_get_symcount (abfd); count++)
1871 asymbol *g = generic[count];
1873 struct external_nlist nsp;
1876 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1877 if (indx == (bfd_size_type) -1)
1879 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1881 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1883 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1884 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1885 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1889 H_PUT_16 (abfd, 0, nsp.e_desc);
1890 H_PUT_8 (abfd, 0, nsp.e_other);
1891 H_PUT_8 (abfd, 0, nsp.e_type);
1894 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1897 amt = EXTERNAL_NLIST_SIZE;
1898 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1901 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1902 here, at the end. */
1906 if (! emit_stringtab (abfd, strtab))
1909 _bfd_stringtab_free (strtab);
1914 _bfd_stringtab_free (strtab);
1919 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1921 unsigned int counter = 0;
1922 aout_symbol_type *symbase;
1924 if (!NAME (aout, slurp_symbol_table) (abfd))
1927 for (symbase = obj_aout_symbols (abfd);
1928 counter++ < bfd_get_symcount (abfd);
1930 *(location++) = (asymbol *) (symbase++);
1932 return bfd_get_symcount (abfd);
1935 /* Standard reloc stuff. */
1936 /* Output standard relocation information to a file in target byte order. */
1938 extern void NAME (aout, swap_std_reloc_out)
1939 (bfd *, arelent *, struct reloc_std_external *);
1942 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1944 struct reloc_std_external *natptr)
1947 asymbol *sym = *(g->sym_ptr_ptr);
1949 unsigned int r_length;
1951 int r_baserel, r_jmptable, r_relative;
1952 asection *output_section = sym->section->output_section;
1954 PUT_WORD (abfd, g->address, natptr->r_address);
1956 r_length = g->howto->size ; /* Size as a power of two. */
1957 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1958 /* XXX This relies on relocs coming from a.out files. */
1959 r_baserel = (g->howto->type & 8) != 0;
1960 r_jmptable = (g->howto->type & 16) != 0;
1961 r_relative = (g->howto->type & 32) != 0;
1963 /* Name was clobbered by aout_write_syms to be symbol index. */
1965 /* If this relocation is relative to a symbol then set the
1966 r_index to the symbols index, and the r_extern bit.
1968 Absolute symbols can come in in two ways, either as an offset
1969 from the abs section, or as a symbol which has an abs value.
1970 check for that here. */
1972 if (bfd_is_com_section (output_section)
1973 || bfd_is_abs_section (output_section)
1974 || bfd_is_und_section (output_section)
1975 /* PR gas/3041 a.out relocs against weak symbols
1976 must be treated as if they were against externs. */
1977 || (sym->flags & BSF_WEAK))
1979 if (bfd_abs_section_ptr->symbol == sym)
1981 /* Whoops, looked like an abs symbol, but is
1982 really an offset from the abs section. */
1988 /* Fill in symbol. */
1990 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1995 /* Just an ordinary section. */
1997 r_index = output_section->target_index;
2000 /* Now the fun stuff. */
2001 if (bfd_header_big_endian (abfd))
2003 natptr->r_index[0] = r_index >> 16;
2004 natptr->r_index[1] = r_index >> 8;
2005 natptr->r_index[2] = r_index;
2006 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
2007 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
2008 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
2009 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
2010 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
2011 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2015 natptr->r_index[2] = r_index >> 16;
2016 natptr->r_index[1] = r_index >> 8;
2017 natptr->r_index[0] = r_index;
2018 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2019 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2020 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2021 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2022 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2023 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2027 /* Extended stuff. */
2028 /* Output extended relocation information to a file in target byte order. */
2030 extern void NAME (aout, swap_ext_reloc_out)
2031 (bfd *, arelent *, struct reloc_ext_external *);
2034 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2036 struct reloc_ext_external *natptr)
2040 unsigned int r_type;
2042 asymbol *sym = *(g->sym_ptr_ptr);
2043 asection *output_section = sym->section->output_section;
2045 PUT_WORD (abfd, g->address, natptr->r_address);
2047 r_type = (unsigned int) g->howto->type;
2049 r_addend = g->addend;
2050 if ((sym->flags & BSF_SECTION_SYM) != 0)
2051 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2053 /* If this relocation is relative to a symbol then set the
2054 r_index to the symbols index, and the r_extern bit.
2056 Absolute symbols can come in in two ways, either as an offset
2057 from the abs section, or as a symbol which has an abs value.
2058 check for that here. */
2059 if (bfd_is_abs_section (bfd_get_section (sym)))
2064 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2066 if (bfd_is_und_section (bfd_get_section (sym))
2067 || (sym->flags & BSF_GLOBAL) != 0)
2071 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2075 /* Just an ordinary section. */
2077 r_index = output_section->target_index;
2080 /* Now the fun stuff. */
2081 if (bfd_header_big_endian (abfd))
2083 natptr->r_index[0] = r_index >> 16;
2084 natptr->r_index[1] = r_index >> 8;
2085 natptr->r_index[2] = r_index;
2086 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2087 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2091 natptr->r_index[2] = r_index >> 16;
2092 natptr->r_index[1] = r_index >> 8;
2093 natptr->r_index[0] = r_index;
2094 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2095 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2098 PUT_WORD (abfd, r_addend, natptr->r_addend);
2101 /* BFD deals internally with all things based from the section they're
2102 in. so, something in 10 bytes into a text section with a base of
2103 50 would have a symbol (.text+10) and know .text vma was 50.
2105 Aout keeps all it's symbols based from zero, so the symbol would
2106 contain 60. This macro subs the base of each section from the value
2107 to give the true offset from the section. */
2109 #define MOVE_ADDRESS(ad) \
2112 /* Undefined symbol. */ \
2113 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2114 cache_ptr->addend = ad; \
2118 /* Defined, section relative. Replace symbol with pointer to \
2119 symbol which points to section. */ \
2123 case N_TEXT | N_EXT: \
2124 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2125 cache_ptr->addend = ad - su->textsec->vma; \
2128 case N_DATA | N_EXT: \
2129 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2130 cache_ptr->addend = ad - su->datasec->vma; \
2133 case N_BSS | N_EXT: \
2134 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2135 cache_ptr->addend = ad - su->bsssec->vma; \
2139 case N_ABS | N_EXT: \
2140 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2141 cache_ptr->addend = ad; \
2147 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2148 struct reloc_ext_external *bytes,
2151 bfd_size_type symcount)
2153 unsigned int r_index;
2155 unsigned int r_type;
2156 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2158 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2160 /* Now the fun stuff. */
2161 if (bfd_header_big_endian (abfd))
2163 r_index = (((unsigned int) bytes->r_index[0] << 16)
2164 | ((unsigned int) bytes->r_index[1] << 8)
2165 | bytes->r_index[2]);
2166 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2167 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2168 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2172 r_index = (((unsigned int) bytes->r_index[2] << 16)
2173 | ((unsigned int) bytes->r_index[1] << 8)
2174 | bytes->r_index[0]);
2175 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2176 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2177 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2180 if (r_type < TABLE_SIZE (howto_table_ext))
2181 cache_ptr->howto = howto_table_ext + r_type;
2183 cache_ptr->howto = NULL;
2185 /* Base relative relocs are always against the symbol table,
2186 regardless of the setting of r_extern. r_extern just reflects
2187 whether the symbol the reloc is against is local or global. */
2188 if (r_type == (unsigned int) RELOC_BASE10
2189 || r_type == (unsigned int) RELOC_BASE13
2190 || r_type == (unsigned int) RELOC_BASE22)
2193 if (r_extern && r_index > symcount)
2195 /* We could arrange to return an error, but it might be useful
2196 to see the file even if it is bad. */
2201 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2205 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2206 struct reloc_std_external *bytes,
2209 bfd_size_type symcount)
2211 unsigned int r_index;
2213 unsigned int r_length;
2215 int r_baserel, r_jmptable, r_relative;
2216 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2217 unsigned int howto_idx;
2219 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2221 /* Now the fun stuff. */
2222 if (bfd_header_big_endian (abfd))
2224 r_index = (((unsigned int) bytes->r_index[0] << 16)
2225 | ((unsigned int) bytes->r_index[1] << 8)
2226 | bytes->r_index[2]);
2227 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2228 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2229 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2230 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2231 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2232 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2233 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2237 r_index = (((unsigned int) bytes->r_index[2] << 16)
2238 | ((unsigned int) bytes->r_index[1] << 8)
2239 | bytes->r_index[0]);
2240 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2241 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2242 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2243 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2244 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2245 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2246 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2249 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2250 + 16 * r_jmptable + 32 * r_relative);
2251 if (howto_idx < TABLE_SIZE (howto_table_std))
2253 cache_ptr->howto = howto_table_std + howto_idx;
2254 if (cache_ptr->howto->type == (unsigned int) -1)
2255 cache_ptr->howto = NULL;
2258 cache_ptr->howto = NULL;
2260 /* Base relative relocs are always against the symbol table,
2261 regardless of the setting of r_extern. r_extern just reflects
2262 whether the symbol the reloc is against is local or global. */
2266 if (r_extern && r_index > symcount)
2268 /* We could arrange to return an error, but it might be useful
2269 to see the file even if it is bad. */
2277 /* Read and swap the relocs for a section. */
2280 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2282 bfd_size_type count;
2283 bfd_size_type reloc_size;
2285 arelent *reloc_cache;
2287 unsigned int counter = 0;
2291 if (asect->relocation)
2294 if (asect->flags & SEC_CONSTRUCTOR)
2297 if (asect == obj_datasec (abfd))
2298 reloc_size = exec_hdr (abfd)->a_drsize;
2299 else if (asect == obj_textsec (abfd))
2300 reloc_size = exec_hdr (abfd)->a_trsize;
2301 else if (asect == obj_bsssec (abfd))
2305 bfd_set_error (bfd_error_invalid_operation);
2309 if (reloc_size == 0)
2310 return TRUE; /* Nothing to be done. */
2312 /* PR binutils/17512: Do not even try to
2313 load the relocs if their size is corrupt. */
2314 if (reloc_size + asect->rel_filepos >= (bfd_size_type) bfd_get_size (abfd))
2317 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2320 each_size = obj_reloc_entry_size (abfd);
2322 count = reloc_size / each_size;
2324 return TRUE; /* Nothing to be done. */
2326 amt = count * sizeof (arelent);
2327 reloc_cache = (arelent *) bfd_zmalloc (amt);
2328 if (reloc_cache == NULL)
2331 relocs = bfd_malloc (reloc_size);
2338 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2345 cache_ptr = reloc_cache;
2346 if (each_size == RELOC_EXT_SIZE)
2348 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2350 for (; counter < count; counter++, rptr++, cache_ptr++)
2351 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2352 (bfd_size_type) bfd_get_symcount (abfd));
2356 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2358 for (; counter < count; counter++, rptr++, cache_ptr++)
2359 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2360 (bfd_size_type) bfd_get_symcount (abfd));
2365 asect->relocation = reloc_cache;
2366 asect->reloc_count = cache_ptr - reloc_cache;
2371 /* Write out a relocation section into an object file. */
2374 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2377 unsigned char *native, *natptr;
2380 unsigned int count = section->reloc_count;
2381 bfd_size_type natsize;
2383 if (count == 0 || section->orelocation == NULL)
2386 each_size = obj_reloc_entry_size (abfd);
2387 natsize = (bfd_size_type) each_size * count;
2388 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2392 generic = section->orelocation;
2394 if (each_size == RELOC_EXT_SIZE)
2396 for (natptr = native;
2398 --count, natptr += each_size, ++generic)
2399 MY_swap_ext_reloc_out (abfd, *generic,
2400 (struct reloc_ext_external *) natptr);
2404 for (natptr = native;
2406 --count, natptr += each_size, ++generic)
2407 MY_swap_std_reloc_out (abfd, *generic,
2408 (struct reloc_std_external *) natptr);
2411 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2413 bfd_release (abfd, native);
2416 bfd_release (abfd, native);
2421 /* This is stupid. This function should be a boolean predicate. */
2424 NAME (aout, canonicalize_reloc) (bfd *abfd,
2429 arelent *tblptr = section->relocation;
2432 if (section == obj_bsssec (abfd))
2438 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2441 if (section->flags & SEC_CONSTRUCTOR)
2443 arelent_chain *chain = section->constructor_chain;
2444 for (count = 0; count < section->reloc_count; count ++)
2446 *relptr ++ = &chain->relent;
2447 chain = chain->next;
2452 tblptr = section->relocation;
2454 for (count = 0; count++ < section->reloc_count; )
2456 *relptr++ = tblptr++;
2461 return section->reloc_count;
2465 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2467 if (bfd_get_format (abfd) != bfd_object)
2469 bfd_set_error (bfd_error_invalid_operation);
2473 if (asect->flags & SEC_CONSTRUCTOR)
2474 return sizeof (arelent *) * (asect->reloc_count + 1);
2476 if (asect == obj_datasec (abfd))
2477 return sizeof (arelent *)
2478 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2481 if (asect == obj_textsec (abfd))
2482 return sizeof (arelent *)
2483 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2486 if (asect == obj_bsssec (abfd))
2487 return sizeof (arelent *);
2489 if (asect == obj_bsssec (abfd))
2492 bfd_set_error (bfd_error_invalid_operation);
2497 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2499 if (!NAME (aout, slurp_symbol_table) (abfd))
2502 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2506 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2507 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2513 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2517 bfd_symbol_info (symbol, ret);
2519 if (ret->type == '?')
2521 int type_code = aout_symbol (symbol)->type & 0xff;
2522 const char *stab_name = bfd_get_stab_name (type_code);
2523 static char buf[10];
2525 if (stab_name == NULL)
2527 sprintf (buf, "(%d)", type_code);
2531 ret->stab_type = type_code;
2532 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2533 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2534 ret->stab_name = stab_name;
2539 NAME (aout, print_symbol) (bfd *abfd,
2542 bfd_print_symbol_type how)
2544 FILE *file = (FILE *)afile;
2548 case bfd_print_symbol_name:
2550 fprintf (file,"%s", symbol->name);
2552 case bfd_print_symbol_more:
2553 fprintf (file,"%4x %2x %2x",
2554 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2555 (unsigned) (aout_symbol (symbol)->other & 0xff),
2556 (unsigned) (aout_symbol (symbol)->type));
2558 case bfd_print_symbol_all:
2560 const char *section_name = symbol->section->name;
2562 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2564 fprintf (file," %-5s %04x %02x %02x",
2566 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2567 (unsigned) (aout_symbol (symbol)->other & 0xff),
2568 (unsigned) (aout_symbol (symbol)->type & 0xff));
2570 fprintf (file," %s", symbol->name);
2576 /* If we don't have to allocate more than 1MB to hold the generic
2577 symbols, we use the generic minisymbol methord: it's faster, since
2578 it only translates the symbols once, not multiple times. */
2579 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2581 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2582 symbols. The minisymbol_to_symbol function translates these into
2583 BFD asymbol structures. */
2586 NAME (aout, read_minisymbols) (bfd *abfd,
2587 bfd_boolean dynamic,
2589 unsigned int *sizep)
2592 /* We could handle the dynamic symbols here as well, but it's
2593 easier to hand them off. */
2594 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2596 if (! aout_get_external_symbols (abfd))
2599 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2600 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2602 *minisymsp = (void *) obj_aout_external_syms (abfd);
2604 /* By passing the external symbols back from this routine, we are
2605 giving up control over the memory block. Clear
2606 obj_aout_external_syms, so that we do not try to free it
2608 obj_aout_external_syms (abfd) = NULL;
2610 *sizep = EXTERNAL_NLIST_SIZE;
2611 return obj_aout_external_sym_count (abfd);
2614 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2615 unmodified a.out symbol. The SYM argument is a structure returned
2616 by bfd_make_empty_symbol, which we fill in here. */
2619 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2620 bfd_boolean dynamic,
2621 const void * minisym,
2625 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2626 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2628 memset (sym, 0, sizeof (aout_symbol_type));
2630 /* We call translate_symbol_table to translate a single symbol. */
2631 if (! (NAME (aout, translate_symbol_table)
2633 (aout_symbol_type *) sym,
2634 (struct external_nlist *) minisym,
2636 obj_aout_external_strings (abfd),
2637 obj_aout_external_string_size (abfd),
2644 /* Provided a BFD, a section and an offset into the section, calculate
2645 and return the name of the source file and the line nearest to the
2649 NAME (aout, find_nearest_line) (bfd *abfd,
2653 const char **filename_ptr,
2654 const char **functionname_ptr,
2655 unsigned int *line_ptr,
2656 unsigned int *disriminator_ptr)
2658 /* Run down the file looking for the filename, function and linenumber. */
2660 const char *directory_name = NULL;
2661 const char *main_file_name = NULL;
2662 const char *current_file_name = NULL;
2663 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2664 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2665 bfd_vma low_line_vma = 0;
2666 bfd_vma low_func_vma = 0;
2668 bfd_size_type filelen, funclen;
2671 *filename_ptr = abfd->filename;
2672 *functionname_ptr = 0;
2674 if (disriminator_ptr)
2675 *disriminator_ptr = 0;
2677 if (symbols != NULL)
2679 for (p = symbols; *p; p++)
2681 aout_symbol_type *q = (aout_symbol_type *) (*p);
2686 /* If this looks like a file name symbol, and it comes after
2687 the line number we have found so far, but before the
2688 offset, then we have probably not found the right line
2690 if (q->symbol.value <= offset
2691 && ((q->symbol.value > low_line_vma
2692 && (line_file_name != NULL
2694 || (q->symbol.value > low_func_vma
2697 const char *symname;
2699 symname = q->symbol.name;
2700 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2702 if (q->symbol.value > low_line_vma)
2705 line_file_name = NULL;
2707 if (q->symbol.value > low_func_vma)
2714 /* If this symbol is less than the offset, but greater than
2715 the line number we have found so far, then we have not
2716 found the right line number. */
2717 if (q->symbol.value <= offset)
2719 if (q->symbol.value > low_line_vma)
2722 line_file_name = NULL;
2724 if (q->symbol.value > low_func_vma)
2728 main_file_name = current_file_name = q->symbol.name;
2729 /* Look ahead to next symbol to check if that too is an N_SO. */
2733 q = (aout_symbol_type *) (*p);
2734 if (q->type != (int)N_SO)
2737 /* Found a second N_SO First is directory; second is filename. */
2738 directory_name = current_file_name;
2739 main_file_name = current_file_name = q->symbol.name;
2740 if (obj_textsec (abfd) != section)
2744 current_file_name = q->symbol.name;
2751 /* We'll keep this if it resolves nearer than the one we have
2753 if (q->symbol.value >= low_line_vma
2754 && q->symbol.value <= offset)
2756 *line_ptr = q->desc;
2757 low_line_vma = q->symbol.value;
2758 line_file_name = current_file_name;
2759 line_directory_name = directory_name;
2764 /* We'll keep this if it is nearer than the one we have already. */
2765 if (q->symbol.value >= low_func_vma &&
2766 q->symbol.value <= offset)
2768 low_func_vma = q->symbol.value;
2769 func = (asymbol *)q;
2771 else if (q->symbol.value > offset)
2782 main_file_name = line_file_name;
2783 directory_name = line_directory_name;
2786 if (main_file_name == NULL
2787 || IS_ABSOLUTE_PATH (main_file_name)
2788 || directory_name == NULL)
2791 filelen = strlen (directory_name) + strlen (main_file_name);
2796 funclen = strlen (bfd_asymbol_name (func));
2798 if (adata (abfd).line_buf != NULL)
2799 free (adata (abfd).line_buf);
2801 if (filelen + funclen == 0)
2802 adata (abfd).line_buf = buf = NULL;
2805 buf = (char *) bfd_malloc (filelen + funclen + 3);
2806 adata (abfd).line_buf = buf;
2811 if (main_file_name != NULL)
2813 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2814 *filename_ptr = main_file_name;
2817 sprintf (buf, "%s%s", directory_name, main_file_name);
2818 *filename_ptr = buf;
2825 const char *function = func->name;
2828 /* The caller expects a symbol name. We actually have a
2829 function name, without the leading underscore. Put the
2830 underscore back in, so that the caller gets a symbol name. */
2831 if (bfd_get_symbol_leading_char (abfd) == '\0')
2832 strcpy (buf, function);
2835 buf[0] = bfd_get_symbol_leading_char (abfd);
2836 strcpy (buf + 1, function);
2838 /* Have to remove : stuff. */
2839 colon = strchr (buf, ':');
2842 *functionname_ptr = buf;
2849 NAME (aout, sizeof_headers) (bfd *abfd,
2850 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2852 return adata (abfd).exec_bytes_size;
2855 /* Free all information we have cached for this BFD. We can always
2856 read it again later if we need it. */
2859 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2863 if (bfd_get_format (abfd) != bfd_object
2864 || abfd->tdata.aout_data == NULL)
2867 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2868 BFCI_FREE (obj_aout_symbols (abfd));
2870 obj_aout_external_syms (abfd) = 0;
2871 bfd_free_window (&obj_aout_sym_window (abfd));
2872 bfd_free_window (&obj_aout_string_window (abfd));
2873 obj_aout_external_strings (abfd) = 0;
2875 BFCI_FREE (obj_aout_external_syms (abfd));
2876 BFCI_FREE (obj_aout_external_strings (abfd));
2878 for (o = abfd->sections; o != NULL; o = o->next)
2879 BFCI_FREE (o->relocation);
2885 /* a.out link code. */
2887 /* Routine to create an entry in an a.out link hash table. */
2889 struct bfd_hash_entry *
2890 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2891 struct bfd_hash_table *table,
2894 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2896 /* Allocate the structure if it has not already been allocated by a
2899 ret = (struct aout_link_hash_entry *) bfd_hash_allocate (table,
2904 /* Call the allocation method of the superclass. */
2905 ret = ((struct aout_link_hash_entry *)
2906 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2910 /* Set local fields. */
2911 ret->written = FALSE;
2915 return (struct bfd_hash_entry *) ret;
2918 /* Initialize an a.out link hash table. */
2921 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2923 struct bfd_hash_entry *(*newfunc)
2924 (struct bfd_hash_entry *, struct bfd_hash_table *,
2926 unsigned int entsize)
2928 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2931 /* Create an a.out link hash table. */
2933 struct bfd_link_hash_table *
2934 NAME (aout, link_hash_table_create) (bfd *abfd)
2936 struct aout_link_hash_table *ret;
2937 bfd_size_type amt = sizeof (* ret);
2939 ret = (struct aout_link_hash_table *) bfd_malloc (amt);
2943 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2944 NAME (aout, link_hash_newfunc),
2945 sizeof (struct aout_link_hash_entry)))
2953 /* Add all symbols from an object file to the hash table. */
2956 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2958 bfd_boolean (*add_one_symbol)
2959 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2960 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2961 struct bfd_link_hash_entry **);
2962 struct external_nlist *syms;
2963 bfd_size_type sym_count;
2966 struct aout_link_hash_entry **sym_hash;
2967 struct external_nlist *p;
2968 struct external_nlist *pend;
2971 syms = obj_aout_external_syms (abfd);
2972 sym_count = obj_aout_external_sym_count (abfd);
2973 strings = obj_aout_external_strings (abfd);
2974 if (info->keep_memory)
2979 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2981 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2982 (abfd, info, &syms, &sym_count, &strings)))
2987 return TRUE; /* Nothing to do. */
2989 /* We keep a list of the linker hash table entries that correspond
2990 to particular symbols. We could just look them up in the hash
2991 table, but keeping the list is more efficient. Perhaps this
2992 should be conditional on info->keep_memory. */
2993 amt = sym_count * sizeof (struct aout_link_hash_entry *);
2994 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt);
2995 if (sym_hash == NULL)
2997 obj_aout_sym_hashes (abfd) = sym_hash;
2999 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3000 if (add_one_symbol == NULL)
3001 add_one_symbol = _bfd_generic_link_add_one_symbol;
3004 pend = p + sym_count;
3005 for (; p < pend; p++, sym_hash++)
3016 type = H_GET_8 (abfd, p->e_type);
3018 /* Ignore debugging symbols. */
3019 if ((type & N_STAB) != 0)
3022 name = strings + GET_WORD (abfd, p->e_strx);
3023 value = GET_WORD (abfd, p->e_value);
3040 /* Ignore symbols that are not externally visible. */
3043 /* Ignore local indirect symbol. */
3048 case N_UNDF | N_EXT:
3051 section = bfd_und_section_ptr;
3055 section = bfd_com_section_ptr;
3058 section = bfd_abs_section_ptr;
3060 case N_TEXT | N_EXT:
3061 section = obj_textsec (abfd);
3062 value -= bfd_get_section_vma (abfd, section);
3064 case N_DATA | N_EXT:
3065 case N_SETV | N_EXT:
3066 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3067 translate_from_native_sym_flags. */
3068 section = obj_datasec (abfd);
3069 value -= bfd_get_section_vma (abfd, section);
3072 section = obj_bsssec (abfd);
3073 value -= bfd_get_section_vma (abfd, section);
3075 case N_INDR | N_EXT:
3076 /* An indirect symbol. The next symbol is the symbol
3077 which this one really is. */
3078 BFD_ASSERT (p + 1 < pend);
3080 string = strings + GET_WORD (abfd, p->e_strx);
3081 section = bfd_ind_section_ptr;
3082 flags |= BSF_INDIRECT;
3084 case N_COMM | N_EXT:
3085 section = bfd_com_section_ptr;
3087 case N_SETA: case N_SETA | N_EXT:
3088 section = bfd_abs_section_ptr;
3089 flags |= BSF_CONSTRUCTOR;
3091 case N_SETT: case N_SETT | N_EXT:
3092 section = obj_textsec (abfd);
3093 flags |= BSF_CONSTRUCTOR;
3094 value -= bfd_get_section_vma (abfd, section);
3096 case N_SETD: case N_SETD | N_EXT:
3097 section = obj_datasec (abfd);
3098 flags |= BSF_CONSTRUCTOR;
3099 value -= bfd_get_section_vma (abfd, section);
3101 case N_SETB: case N_SETB | N_EXT:
3102 section = obj_bsssec (abfd);
3103 flags |= BSF_CONSTRUCTOR;
3104 value -= bfd_get_section_vma (abfd, section);
3107 /* A warning symbol. The next symbol is the one to warn
3108 about. If there is no next symbol, just look away. */
3113 name = strings + GET_WORD (abfd, p->e_strx);
3114 section = bfd_und_section_ptr;
3115 flags |= BSF_WARNING;
3118 section = bfd_und_section_ptr;
3122 section = bfd_abs_section_ptr;
3126 section = obj_textsec (abfd);
3127 value -= bfd_get_section_vma (abfd, section);
3131 section = obj_datasec (abfd);
3132 value -= bfd_get_section_vma (abfd, section);
3136 section = obj_bsssec (abfd);
3137 value -= bfd_get_section_vma (abfd, section);
3142 if (! ((*add_one_symbol)
3143 (info, abfd, name, flags, section, value, string, copy, FALSE,
3144 (struct bfd_link_hash_entry **) sym_hash)))
3147 /* Restrict the maximum alignment of a common symbol based on
3148 the architecture, since a.out has no way to represent
3149 alignment requirements of a section in a .o file. FIXME:
3150 This isn't quite right: it should use the architecture of the
3151 output file, not the input files. */
3152 if ((*sym_hash)->root.type == bfd_link_hash_common
3153 && ((*sym_hash)->root.u.c.p->alignment_power >
3154 bfd_get_arch_info (abfd)->section_align_power))
3155 (*sym_hash)->root.u.c.p->alignment_power =
3156 bfd_get_arch_info (abfd)->section_align_power;
3158 /* If this is a set symbol, and we are not building sets, then
3159 it is possible for the hash entry to not have been set. In
3160 such a case, treat the symbol as not globally defined. */
3161 if ((*sym_hash)->root.type == bfd_link_hash_new)
3163 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3167 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3174 /* Free up the internal symbols read from an a.out file. */
3177 aout_link_free_symbols (bfd *abfd)
3179 if (obj_aout_external_syms (abfd) != NULL)
3182 bfd_free_window (&obj_aout_sym_window (abfd));
3184 free ((void *) obj_aout_external_syms (abfd));
3186 obj_aout_external_syms (abfd) = NULL;
3188 if (obj_aout_external_strings (abfd) != NULL)
3191 bfd_free_window (&obj_aout_string_window (abfd));
3193 free ((void *) obj_aout_external_strings (abfd));
3195 obj_aout_external_strings (abfd) = NULL;
3200 /* Add symbols from an a.out object file. */
3203 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3205 if (! aout_get_external_symbols (abfd))
3207 if (! aout_link_add_symbols (abfd, info))
3209 if (! info->keep_memory)
3211 if (! aout_link_free_symbols (abfd))
3217 /* Look through the internal symbols to see if this object file should
3218 be included in the link. We should include this object file if it
3219 defines any symbols which are currently undefined. If this object
3220 file defines a common symbol, then we may adjust the size of the
3221 known symbol but we do not include the object file in the link
3222 (unless there is some other reason to include it). */
3225 aout_link_check_ar_symbols (bfd *abfd,
3226 struct bfd_link_info *info,
3227 bfd_boolean *pneeded,
3230 struct external_nlist *p;
3231 struct external_nlist *pend;
3236 /* Look through all the symbols. */
3237 p = obj_aout_external_syms (abfd);
3238 pend = p + obj_aout_external_sym_count (abfd);
3239 strings = obj_aout_external_strings (abfd);
3240 for (; p < pend; p++)
3242 int type = H_GET_8 (abfd, p->e_type);
3244 struct bfd_link_hash_entry *h;
3246 /* Ignore symbols that are not externally visible. This is an
3247 optimization only, as we check the type more thoroughly
3249 if (((type & N_EXT) == 0
3250 || (type & N_STAB) != 0
3257 if (type == N_WARNING
3263 name = strings + GET_WORD (abfd, p->e_strx);
3264 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3266 /* We are only interested in symbols that are currently
3267 undefined or common. */
3269 || (h->type != bfd_link_hash_undefined
3270 && h->type != bfd_link_hash_common))
3272 if (type == (N_INDR | N_EXT))
3277 if (type == (N_TEXT | N_EXT)
3278 || type == (N_DATA | N_EXT)
3279 || type == (N_BSS | N_EXT)
3280 || type == (N_ABS | N_EXT)
3281 || type == (N_INDR | N_EXT))
3283 /* This object file defines this symbol. We must link it
3284 in. This is true regardless of whether the current
3285 definition of the symbol is undefined or common.
3287 If the current definition is common, we have a case in
3288 which we have already seen an object file including:
3290 and this object file from the archive includes:
3292 In such a case, whether to include this object is target
3293 dependant for backward compatibility.
3295 FIXME: The SunOS 4.1.3 linker will pull in the archive
3296 element if the symbol is defined in the .data section,
3297 but not if it is defined in the .text section. That
3298 seems a bit crazy to me, and it has not been implemented
3299 yet. However, it might be correct. */
3300 if (h->type == bfd_link_hash_common)
3304 switch (info->common_skip_ar_symbols)
3306 case bfd_link_common_skip_text:
3307 skip = (type == (N_TEXT | N_EXT));
3309 case bfd_link_common_skip_data:
3310 skip = (type == (N_DATA | N_EXT));
3313 case bfd_link_common_skip_all:
3322 if (!(*info->callbacks
3323 ->add_archive_element) (info, abfd, name, subsbfd))
3329 if (type == (N_UNDF | N_EXT))
3333 value = GET_WORD (abfd, p->e_value);
3336 /* This symbol is common in the object from the archive
3338 if (h->type == bfd_link_hash_undefined)
3343 symbfd = h->u.undef.abfd;
3346 /* This symbol was created as undefined from
3347 outside BFD. We assume that we should link
3348 in the object file. This is done for the -u
3349 option in the linker. */
3350 if (!(*info->callbacks
3351 ->add_archive_element) (info, abfd, name, subsbfd))
3356 /* Turn the current link symbol into a common
3357 symbol. It is already on the undefs list. */
3358 h->type = bfd_link_hash_common;
3359 h->u.c.p = (struct bfd_link_hash_common_entry *)
3360 bfd_hash_allocate (&info->hash->table,
3361 sizeof (struct bfd_link_hash_common_entry));
3362 if (h->u.c.p == NULL)
3365 h->u.c.size = value;
3367 /* FIXME: This isn't quite right. The maximum
3368 alignment of a common symbol should be set by the
3369 architecture of the output file, not of the input
3371 power = bfd_log2 (value);
3372 if (power > bfd_get_arch_info (abfd)->section_align_power)
3373 power = bfd_get_arch_info (abfd)->section_align_power;
3374 h->u.c.p->alignment_power = power;
3376 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3381 /* Adjust the size of the common symbol if
3383 if (value > h->u.c.size)
3384 h->u.c.size = value;
3394 /* This symbol is weak but defined. We must pull it in if
3395 the current link symbol is undefined, but we don't want
3396 it if the current link symbol is common. */
3397 if (h->type == bfd_link_hash_undefined)
3399 if (!(*info->callbacks
3400 ->add_archive_element) (info, abfd, name, subsbfd))
3408 /* We do not need this object file. */
3411 /* Check a single archive element to see if we need to include it in
3412 the link. *PNEEDED is set according to whether this element is
3413 needed in the link or not. This is called from
3414 _bfd_generic_link_add_archive_symbols. */
3417 aout_link_check_archive_element (bfd *abfd,
3418 struct bfd_link_info *info,
3419 struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED,
3420 const char *name ATTRIBUTE_UNUSED,
3421 bfd_boolean *pneeded)
3426 if (!aout_get_external_symbols (abfd))
3430 if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd))
3436 /* Potentially, the add_archive_element hook may have set a
3437 substitute BFD for us. */
3440 if (!info->keep_memory
3441 && !aout_link_free_symbols (oldbfd))
3443 if (!aout_get_external_symbols (abfd))
3446 if (!aout_link_add_symbols (abfd, info))
3450 if (!info->keep_memory || !needed)
3452 if (!aout_link_free_symbols (abfd))
3459 /* Given an a.out BFD, add symbols to the global hash table as
3463 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3465 switch (bfd_get_format (abfd))
3468 return aout_link_add_object_symbols (abfd, info);
3470 return _bfd_generic_link_add_archive_symbols
3471 (abfd, info, aout_link_check_archive_element);
3473 bfd_set_error (bfd_error_wrong_format);
3478 /* A hash table used for header files with N_BINCL entries. */
3480 struct aout_link_includes_table
3482 struct bfd_hash_table root;
3485 /* A linked list of totals that we have found for a particular header
3488 struct aout_link_includes_totals
3490 struct aout_link_includes_totals *next;
3494 /* An entry in the header file hash table. */
3496 struct aout_link_includes_entry
3498 struct bfd_hash_entry root;
3499 /* List of totals we have found for this file. */
3500 struct aout_link_includes_totals *totals;
3503 /* Look up an entry in an the header file hash table. */
3505 #define aout_link_includes_lookup(table, string, create, copy) \
3506 ((struct aout_link_includes_entry *) \
3507 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3509 /* During the final link step we need to pass around a bunch of
3510 information, so we do it in an instance of this structure. */
3512 struct aout_final_link_info
3514 /* General link information. */
3515 struct bfd_link_info *info;
3518 /* Reloc file positions. */
3519 file_ptr treloff, dreloff;
3520 /* File position of symbols. */
3523 struct bfd_strtab_hash *strtab;
3524 /* Header file hash table. */
3525 struct aout_link_includes_table includes;
3526 /* A buffer large enough to hold the contents of any section. */
3528 /* A buffer large enough to hold the relocs of any section. */
3530 /* A buffer large enough to hold the symbol map of any input BFD. */
3532 /* A buffer large enough to hold output symbols of any input BFD. */
3533 struct external_nlist *output_syms;
3536 /* The function to create a new entry in the header file hash table. */
3538 static struct bfd_hash_entry *
3539 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3540 struct bfd_hash_table *table,
3543 struct aout_link_includes_entry *ret =
3544 (struct aout_link_includes_entry *) entry;
3546 /* Allocate the structure if it has not already been allocated by a
3549 ret = (struct aout_link_includes_entry *)
3550 bfd_hash_allocate (table, sizeof (* ret));
3554 /* Call the allocation method of the superclass. */
3555 ret = ((struct aout_link_includes_entry *)
3556 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3559 /* Set local fields. */
3563 return (struct bfd_hash_entry *) ret;
3566 /* Write out a symbol that was not associated with an a.out input
3570 aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data)
3572 struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh;
3573 struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data;
3577 struct external_nlist outsym;
3581 if (h->root.type == bfd_link_hash_warning)
3583 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3584 if (h->root.type == bfd_link_hash_new)
3588 output_bfd = flaginfo->output_bfd;
3590 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3592 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3593 (output_bfd, flaginfo->info, h)))
3595 /* FIXME: No way to handle errors. */
3605 /* An indx of -2 means the symbol must be written. */
3607 && (flaginfo->info->strip == strip_all
3608 || (flaginfo->info->strip == strip_some
3609 && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string,
3610 FALSE, FALSE) == NULL)))
3613 switch (h->root.type)
3616 case bfd_link_hash_warning:
3618 /* Avoid variable not initialized warnings. */
3620 case bfd_link_hash_new:
3621 /* This can happen for set symbols when sets are not being
3624 case bfd_link_hash_undefined:
3625 type = N_UNDF | N_EXT;
3628 case bfd_link_hash_defined:
3629 case bfd_link_hash_defweak:
3633 sec = h->root.u.def.section->output_section;
3634 BFD_ASSERT (bfd_is_abs_section (sec)
3635 || sec->owner == output_bfd);
3636 if (sec == obj_textsec (output_bfd))
3637 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3638 else if (sec == obj_datasec (output_bfd))
3639 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3640 else if (sec == obj_bsssec (output_bfd))
3641 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3643 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3645 val = (h->root.u.def.value
3647 + h->root.u.def.section->output_offset);
3650 case bfd_link_hash_common:
3651 type = N_UNDF | N_EXT;
3652 val = h->root.u.c.size;
3654 case bfd_link_hash_undefweak:
3658 case bfd_link_hash_indirect:
3659 /* We ignore these symbols, since the indirected symbol is
3660 already in the hash table. */
3664 H_PUT_8 (output_bfd, type, outsym.e_type);
3665 H_PUT_8 (output_bfd, 0, outsym.e_other);
3666 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3667 indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string,
3669 if (indx == - (bfd_size_type) 1)
3670 /* FIXME: No way to handle errors. */
3673 PUT_WORD (output_bfd, indx, outsym.e_strx);
3674 PUT_WORD (output_bfd, val, outsym.e_value);
3676 amt = EXTERNAL_NLIST_SIZE;
3677 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0
3678 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3679 /* FIXME: No way to handle errors. */
3682 flaginfo->symoff += EXTERNAL_NLIST_SIZE;
3683 h->indx = obj_aout_external_sym_count (output_bfd);
3684 ++obj_aout_external_sym_count (output_bfd);
3689 /* Handle a link order which is supposed to generate a reloc. */
3692 aout_link_reloc_link_order (struct aout_final_link_info *flaginfo,
3694 struct bfd_link_order *p)
3696 struct bfd_link_order_reloc *pr;
3699 reloc_howto_type *howto;
3700 file_ptr *reloff_ptr = NULL;
3701 struct reloc_std_external srel;
3702 struct reloc_ext_external erel;
3708 if (p->type == bfd_section_reloc_link_order)
3711 if (bfd_is_abs_section (pr->u.section))
3712 r_index = N_ABS | N_EXT;
3715 BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd);
3716 r_index = pr->u.section->target_index;
3721 struct aout_link_hash_entry *h;
3723 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3725 h = ((struct aout_link_hash_entry *)
3726 bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info,
3727 pr->u.name, FALSE, FALSE, TRUE));
3733 /* We decided to strip this symbol, but it turns out that we
3734 can't. Note that we lose the other and desc information
3735 here. I don't think that will ever matter for a global
3739 if (!aout_link_write_other_symbol (&h->root.root, flaginfo))
3745 if (! ((*flaginfo->info->callbacks->unattached_reloc)
3746 (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0)))
3752 howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc);
3755 bfd_set_error (bfd_error_bad_value);
3759 if (o == obj_textsec (flaginfo->output_bfd))
3760 reloff_ptr = &flaginfo->treloff;
3761 else if (o == obj_datasec (flaginfo->output_bfd))
3762 reloff_ptr = &flaginfo->dreloff;
3766 if (obj_reloc_entry_size (flaginfo->output_bfd) == RELOC_STD_SIZE)
3769 MY_put_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, howto,
3779 r_pcrel = (int) howto->pc_relative;
3780 r_baserel = (howto->type & 8) != 0;
3781 r_jmptable = (howto->type & 16) != 0;
3782 r_relative = (howto->type & 32) != 0;
3783 r_length = howto->size;
3785 PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address);
3786 if (bfd_header_big_endian (flaginfo->output_bfd))
3788 srel.r_index[0] = r_index >> 16;
3789 srel.r_index[1] = r_index >> 8;
3790 srel.r_index[2] = r_index;
3792 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3793 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3794 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3795 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3796 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3797 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3801 srel.r_index[2] = r_index >> 16;
3802 srel.r_index[1] = r_index >> 8;
3803 srel.r_index[0] = r_index;
3805 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3806 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3807 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3808 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3809 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3810 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3814 rel_ptr = (void *) &srel;
3816 /* We have to write the addend into the object file, since
3817 standard a.out relocs are in place. It would be more
3818 reliable if we had the current contents of the file here,
3819 rather than assuming zeroes, but we can't read the file since
3820 it was opened using bfd_openw. */
3821 if (pr->addend != 0)
3824 bfd_reloc_status_type r;
3828 size = bfd_get_reloc_size (howto);
3829 buf = (bfd_byte *) bfd_zmalloc (size);
3832 r = MY_relocate_contents (howto, flaginfo->output_bfd,
3833 (bfd_vma) pr->addend, buf);
3839 case bfd_reloc_outofrange:
3841 case bfd_reloc_overflow:
3842 if (! ((*flaginfo->info->callbacks->reloc_overflow)
3843 (flaginfo->info, NULL,
3844 (p->type == bfd_section_reloc_link_order
3845 ? bfd_section_name (flaginfo->output_bfd,
3848 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0)))
3855 ok = bfd_set_section_contents (flaginfo->output_bfd, o, (void *) buf,
3856 (file_ptr) p->offset, size);
3864 #ifdef MY_put_ext_reloc
3865 MY_put_ext_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset,
3866 howto, &erel, pr->addend);
3868 PUT_WORD (flaginfo->output_bfd, p->offset, erel.r_address);
3870 if (bfd_header_big_endian (flaginfo->output_bfd))
3872 erel.r_index[0] = r_index >> 16;
3873 erel.r_index[1] = r_index >> 8;
3874 erel.r_index[2] = r_index;
3876 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3877 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3881 erel.r_index[2] = r_index >> 16;
3882 erel.r_index[1] = r_index >> 8;
3883 erel.r_index[0] = r_index;
3885 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3886 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3889 PUT_WORD (flaginfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3890 #endif /* MY_put_ext_reloc */
3892 rel_ptr = (void *) &erel;
3895 amt = obj_reloc_entry_size (flaginfo->output_bfd);
3896 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3897 || bfd_bwrite (rel_ptr, amt, flaginfo->output_bfd) != amt)
3900 *reloff_ptr += obj_reloc_entry_size (flaginfo->output_bfd);
3902 /* Assert that the relocs have not run into the symbols, and that n
3903 the text relocs have not run into the data relocs. */
3904 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
3905 && (reloff_ptr != &flaginfo->treloff
3907 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
3912 /* Get the section corresponding to a reloc index. */
3914 static INLINE asection *
3915 aout_reloc_index_to_section (bfd *abfd, int indx)
3917 switch (indx & N_TYPE)
3919 case N_TEXT: return obj_textsec (abfd);
3920 case N_DATA: return obj_datasec (abfd);
3921 case N_BSS: return obj_bsssec (abfd);
3923 case N_UNDF: return bfd_abs_section_ptr;
3929 /* Relocate an a.out section using standard a.out relocs. */
3932 aout_link_input_section_std (struct aout_final_link_info *flaginfo,
3934 asection *input_section,
3935 struct reloc_std_external *relocs,
3936 bfd_size_type rel_size,
3939 bfd_boolean (*check_dynamic_reloc)
3940 (struct bfd_link_info *, bfd *, asection *,
3941 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3944 bfd_boolean relocatable;
3945 struct external_nlist *syms;
3947 struct aout_link_hash_entry **sym_hashes;
3949 bfd_size_type reloc_count;
3950 struct reloc_std_external *rel;
3951 struct reloc_std_external *rel_end;
3953 output_bfd = flaginfo->output_bfd;
3954 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3956 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3957 BFD_ASSERT (input_bfd->xvec->header_byteorder
3958 == output_bfd->xvec->header_byteorder);
3960 relocatable = flaginfo->info->relocatable;
3961 syms = obj_aout_external_syms (input_bfd);
3962 strings = obj_aout_external_strings (input_bfd);
3963 sym_hashes = obj_aout_sym_hashes (input_bfd);
3964 symbol_map = flaginfo->symbol_map;
3966 reloc_count = rel_size / RELOC_STD_SIZE;
3968 rel_end = rel + reloc_count;
3969 for (; rel < rel_end; rel++)
3976 reloc_howto_type *howto;
3977 struct aout_link_hash_entry *h = NULL;
3979 bfd_reloc_status_type r;
3981 r_addr = GET_SWORD (input_bfd, rel->r_address);
3983 #ifdef MY_reloc_howto
3984 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
3990 unsigned int howto_idx;
3992 if (bfd_header_big_endian (input_bfd))
3994 r_index = (((unsigned int) rel->r_index[0] << 16)
3995 | ((unsigned int) rel->r_index[1] << 8)
3997 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
3998 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
3999 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4000 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4001 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4002 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4003 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4007 r_index = (((unsigned int) rel->r_index[2] << 16)
4008 | ((unsigned int) rel->r_index[1] << 8)
4010 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4011 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4012 r_baserel = (0 != (rel->r_type[0]
4013 & RELOC_STD_BITS_BASEREL_LITTLE));
4014 r_jmptable= (0 != (rel->r_type[0]
4015 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4016 r_relative= (0 != (rel->r_type[0]
4017 & RELOC_STD_BITS_RELATIVE_LITTLE));
4018 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4019 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4022 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4023 + 16 * r_jmptable + 32 * r_relative);
4024 if (howto_idx < TABLE_SIZE (howto_table_std))
4025 howto = howto_table_std + howto_idx;
4033 (*flaginfo->info->callbacks->einfo)
4034 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4035 bfd_set_error (bfd_error_bad_value);
4041 /* We are generating a relocatable output file, and must
4042 modify the reloc accordingly. */
4045 /* If we know the symbol this relocation is against,
4046 convert it into a relocation against a section. This
4047 is what the native linker does. */
4048 h = sym_hashes[r_index];
4050 && (h->root.type == bfd_link_hash_defined
4051 || h->root.type == bfd_link_hash_defweak))
4053 asection *output_section;
4055 /* Change the r_extern value. */
4056 if (bfd_header_big_endian (output_bfd))
4057 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4059 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4061 /* Compute a new r_index. */
4062 output_section = h->root.u.def.section->output_section;
4063 if (output_section == obj_textsec (output_bfd))
4065 else if (output_section == obj_datasec (output_bfd))
4067 else if (output_section == obj_bsssec (output_bfd))
4072 /* Add the symbol value and the section VMA to the
4073 addend stored in the contents. */
4074 relocation = (h->root.u.def.value
4075 + output_section->vma
4076 + h->root.u.def.section->output_offset);
4080 /* We must change r_index according to the symbol
4082 r_index = symbol_map[r_index];
4088 /* We decided to strip this symbol, but it
4089 turns out that we can't. Note that we
4090 lose the other and desc information here.
4091 I don't think that will ever matter for a
4097 if (!aout_link_write_other_symbol (&h->root.root,
4107 name = strings + GET_WORD (input_bfd,
4108 syms[r_index].e_strx);
4109 if (! ((*flaginfo->info->callbacks->unattached_reloc)
4110 (flaginfo->info, name, input_bfd, input_section,
4120 /* Write out the new r_index value. */
4121 if (bfd_header_big_endian (output_bfd))
4123 rel->r_index[0] = r_index >> 16;
4124 rel->r_index[1] = r_index >> 8;
4125 rel->r_index[2] = r_index;
4129 rel->r_index[2] = r_index >> 16;
4130 rel->r_index[1] = r_index >> 8;
4131 rel->r_index[0] = r_index;
4138 /* This is a relocation against a section. We must
4139 adjust by the amount that the section moved. */
4140 section = aout_reloc_index_to_section (input_bfd, r_index);
4141 relocation = (section->output_section->vma
4142 + section->output_offset
4146 /* Change the address of the relocation. */
4147 PUT_WORD (output_bfd,
4148 r_addr + input_section->output_offset,
4151 /* Adjust a PC relative relocation by removing the reference
4152 to the original address in the section and including the
4153 reference to the new address. */
4155 relocation -= (input_section->output_section->vma
4156 + input_section->output_offset
4157 - input_section->vma);
4159 #ifdef MY_relocatable_reloc
4160 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4163 if (relocation == 0)
4166 r = MY_relocate_contents (howto,
4167 input_bfd, relocation,
4174 /* We are generating an executable, and must do a full
4180 h = sym_hashes[r_index];
4183 && (h->root.type == bfd_link_hash_defined
4184 || h->root.type == bfd_link_hash_defweak))
4186 relocation = (h->root.u.def.value
4187 + h->root.u.def.section->output_section->vma
4188 + h->root.u.def.section->output_offset);
4191 && h->root.type == bfd_link_hash_undefweak)
4203 section = aout_reloc_index_to_section (input_bfd, r_index);
4204 relocation = (section->output_section->vma
4205 + section->output_offset
4208 relocation += input_section->vma;
4211 if (check_dynamic_reloc != NULL)
4215 if (! ((*check_dynamic_reloc)
4216 (flaginfo->info, input_bfd, input_section, h,
4217 (void *) rel, contents, &skip, &relocation)))
4223 /* Now warn if a global symbol is undefined. We could not
4224 do this earlier, because check_dynamic_reloc might want
4225 to skip this reloc. */
4226 if (hundef && ! flaginfo->info->shared && ! r_baserel)
4231 name = h->root.root.string;
4233 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4234 if (! ((*flaginfo->info->callbacks->undefined_symbol)
4235 (flaginfo->info, name, input_bfd, input_section,
4240 r = MY_final_link_relocate (howto,
4241 input_bfd, input_section,
4242 contents, r_addr, relocation,
4246 if (r != bfd_reloc_ok)
4251 case bfd_reloc_outofrange:
4253 case bfd_reloc_overflow:
4260 name = strings + GET_WORD (input_bfd,
4261 syms[r_index].e_strx);
4266 s = aout_reloc_index_to_section (input_bfd, r_index);
4267 name = bfd_section_name (input_bfd, s);
4269 if (! ((*flaginfo->info->callbacks->reloc_overflow)
4270 (flaginfo->info, (h ? &h->root : NULL), name,
4271 howto->name, (bfd_vma) 0, input_bfd,
4272 input_section, r_addr)))
4283 /* Relocate an a.out section using extended a.out relocs. */
4286 aout_link_input_section_ext (struct aout_final_link_info *flaginfo,
4288 asection *input_section,
4289 struct reloc_ext_external *relocs,
4290 bfd_size_type rel_size,
4293 bfd_boolean (*check_dynamic_reloc)
4294 (struct bfd_link_info *, bfd *, asection *,
4295 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4298 bfd_boolean relocatable;
4299 struct external_nlist *syms;
4301 struct aout_link_hash_entry **sym_hashes;
4303 bfd_size_type reloc_count;
4304 struct reloc_ext_external *rel;
4305 struct reloc_ext_external *rel_end;
4307 output_bfd = flaginfo->output_bfd;
4308 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4310 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4311 BFD_ASSERT (input_bfd->xvec->header_byteorder
4312 == output_bfd->xvec->header_byteorder);
4314 relocatable = flaginfo->info->relocatable;
4315 syms = obj_aout_external_syms (input_bfd);
4316 strings = obj_aout_external_strings (input_bfd);
4317 sym_hashes = obj_aout_sym_hashes (input_bfd);
4318 symbol_map = flaginfo->symbol_map;
4320 reloc_count = rel_size / RELOC_EXT_SIZE;
4322 rel_end = rel + reloc_count;
4323 for (; rel < rel_end; rel++)
4328 unsigned int r_type;
4330 struct aout_link_hash_entry *h = NULL;
4331 asection *r_section = NULL;
4334 r_addr = GET_SWORD (input_bfd, rel->r_address);
4336 if (bfd_header_big_endian (input_bfd))
4338 r_index = (((unsigned int) rel->r_index[0] << 16)
4339 | ((unsigned int) rel->r_index[1] << 8)
4341 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4342 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4343 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4347 r_index = (((unsigned int) rel->r_index[2] << 16)
4348 | ((unsigned int) rel->r_index[1] << 8)
4350 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4351 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4352 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4355 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4357 if (r_type >= TABLE_SIZE (howto_table_ext))
4359 (*flaginfo->info->callbacks->einfo)
4360 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4361 bfd_set_error (bfd_error_bad_value);
4367 /* We are generating a relocatable output file, and must
4368 modify the reloc accordingly. */
4370 || r_type == (unsigned int) RELOC_BASE10
4371 || r_type == (unsigned int) RELOC_BASE13
4372 || r_type == (unsigned int) RELOC_BASE22)
4374 /* If we know the symbol this relocation is against,
4375 convert it into a relocation against a section. This
4376 is what the native linker does. */
4377 if (r_type == (unsigned int) RELOC_BASE10
4378 || r_type == (unsigned int) RELOC_BASE13
4379 || r_type == (unsigned int) RELOC_BASE22)
4382 h = sym_hashes[r_index];
4384 && (h->root.type == bfd_link_hash_defined
4385 || h->root.type == bfd_link_hash_defweak))
4387 asection *output_section;
4389 /* Change the r_extern value. */
4390 if (bfd_header_big_endian (output_bfd))
4391 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4393 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4395 /* Compute a new r_index. */
4396 output_section = h->root.u.def.section->output_section;
4397 if (output_section == obj_textsec (output_bfd))
4399 else if (output_section == obj_datasec (output_bfd))
4401 else if (output_section == obj_bsssec (output_bfd))
4406 /* Add the symbol value and the section VMA to the
4408 relocation = (h->root.u.def.value
4409 + output_section->vma
4410 + h->root.u.def.section->output_offset);
4412 /* Now RELOCATION is the VMA of the final
4413 destination. If this is a PC relative reloc,
4414 then ADDEND is the negative of the source VMA.
4415 We want to set ADDEND to the difference between
4416 the destination VMA and the source VMA, which
4417 means we must adjust RELOCATION by the change in
4418 the source VMA. This is done below. */
4422 /* We must change r_index according to the symbol
4424 r_index = symbol_map[r_index];
4430 /* We decided to strip this symbol, but it
4431 turns out that we can't. Note that we
4432 lose the other and desc information here.
4433 I don't think that will ever matter for a
4439 if (!aout_link_write_other_symbol (&h->root.root,
4449 name = strings + GET_WORD (input_bfd,
4450 syms[r_index].e_strx);
4451 if (! ((*flaginfo->info->callbacks->unattached_reloc)
4452 (flaginfo->info, name, input_bfd, input_section,
4461 /* If this is a PC relative reloc, then the addend
4462 is the negative of the source VMA. We must
4463 adjust it by the change in the source VMA. This
4467 /* Write out the new r_index value. */
4468 if (bfd_header_big_endian (output_bfd))
4470 rel->r_index[0] = r_index >> 16;
4471 rel->r_index[1] = r_index >> 8;
4472 rel->r_index[2] = r_index;
4476 rel->r_index[2] = r_index >> 16;
4477 rel->r_index[1] = r_index >> 8;
4478 rel->r_index[0] = r_index;
4483 /* This is a relocation against a section. We must
4484 adjust by the amount that the section moved. */
4485 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4486 relocation = (r_section->output_section->vma
4487 + r_section->output_offset
4490 /* If this is a PC relative reloc, then the addend is
4491 the difference in VMA between the destination and the
4492 source. We have just adjusted for the change in VMA
4493 of the destination, so we must also adjust by the
4494 change in VMA of the source. This is done below. */
4497 /* As described above, we must always adjust a PC relative
4498 reloc by the change in VMA of the source. However, if
4499 pcrel_offset is set, then the addend does not include the
4500 location within the section, in which case we don't need
4501 to adjust anything. */
4502 if (howto_table_ext[r_type].pc_relative
4503 && ! howto_table_ext[r_type].pcrel_offset)
4504 relocation -= (input_section->output_section->vma
4505 + input_section->output_offset
4506 - input_section->vma);
4508 /* Change the addend if necessary. */
4509 if (relocation != 0)
4510 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4512 /* Change the address of the relocation. */
4513 PUT_WORD (output_bfd,
4514 r_addr + input_section->output_offset,
4520 bfd_reloc_status_type r;
4522 /* We are generating an executable, and must do a full
4528 h = sym_hashes[r_index];
4531 && (h->root.type == bfd_link_hash_defined
4532 || h->root.type == bfd_link_hash_defweak))
4534 relocation = (h->root.u.def.value
4535 + h->root.u.def.section->output_section->vma
4536 + h->root.u.def.section->output_offset);
4539 && h->root.type == bfd_link_hash_undefweak)
4547 else if (r_type == (unsigned int) RELOC_BASE10
4548 || r_type == (unsigned int) RELOC_BASE13
4549 || r_type == (unsigned int) RELOC_BASE22)
4551 struct external_nlist *sym;
4554 /* For base relative relocs, r_index is always an index
4555 into the symbol table, even if r_extern is 0. */
4556 sym = syms + r_index;
4557 type = H_GET_8 (input_bfd, sym->e_type);
4558 if ((type & N_TYPE) == N_TEXT
4560 r_section = obj_textsec (input_bfd);
4561 else if ((type & N_TYPE) == N_DATA
4563 r_section = obj_datasec (input_bfd);
4564 else if ((type & N_TYPE) == N_BSS
4566 r_section = obj_bsssec (input_bfd);
4567 else if ((type & N_TYPE) == N_ABS
4569 r_section = bfd_abs_section_ptr;
4572 relocation = (r_section->output_section->vma
4573 + r_section->output_offset
4574 + (GET_WORD (input_bfd, sym->e_value)
4579 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4581 /* If this is a PC relative reloc, then R_ADDEND is the
4582 difference between the two vmas, or
4583 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4585 old_dest_sec == section->vma
4587 old_src_sec == input_section->vma
4589 old_src_off == r_addr
4591 _bfd_final_link_relocate expects RELOCATION +
4592 R_ADDEND to be the VMA of the destination minus
4593 r_addr (the minus r_addr is because this relocation
4594 is not pcrel_offset, which is a bit confusing and
4595 should, perhaps, be changed), or
4598 new_dest_sec == output_section->vma + output_offset
4599 We arrange for this to happen by setting RELOCATION to
4600 new_dest_sec + old_src_sec - old_dest_sec
4602 If this is not a PC relative reloc, then R_ADDEND is
4603 simply the VMA of the destination, so we set
4604 RELOCATION to the change in the destination VMA, or
4605 new_dest_sec - old_dest_sec
4607 relocation = (r_section->output_section->vma
4608 + r_section->output_offset
4610 if (howto_table_ext[r_type].pc_relative)
4611 relocation += input_section->vma;
4614 if (check_dynamic_reloc != NULL)
4618 if (! ((*check_dynamic_reloc)
4619 (flaginfo->info, input_bfd, input_section, h,
4620 (void *) rel, contents, &skip, &relocation)))
4626 /* Now warn if a global symbol is undefined. We could not
4627 do this earlier, because check_dynamic_reloc might want
4628 to skip this reloc. */
4630 && ! flaginfo->info->shared
4631 && r_type != (unsigned int) RELOC_BASE10
4632 && r_type != (unsigned int) RELOC_BASE13
4633 && r_type != (unsigned int) RELOC_BASE22)
4638 name = h->root.root.string;
4640 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4641 if (! ((*flaginfo->info->callbacks->undefined_symbol)
4642 (flaginfo->info, name, input_bfd, input_section,
4647 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4648 r = MY_final_link_relocate (howto_table_ext + r_type,
4649 input_bfd, input_section,
4650 contents, r_addr, relocation,
4656 x = bfd_get_32 (input_bfd, contents + r_addr);
4657 x = x + relocation + r_addend;
4658 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4662 if (r != bfd_reloc_ok)
4667 case bfd_reloc_outofrange:
4669 case bfd_reloc_overflow:
4676 || r_type == (unsigned int) RELOC_BASE10
4677 || r_type == (unsigned int) RELOC_BASE13
4678 || r_type == (unsigned int) RELOC_BASE22)
4679 name = strings + GET_WORD (input_bfd,
4680 syms[r_index].e_strx);
4685 s = aout_reloc_index_to_section (input_bfd, r_index);
4686 name = bfd_section_name (input_bfd, s);
4688 if (! ((*flaginfo->info->callbacks->reloc_overflow)
4689 (flaginfo->info, (h ? &h->root : NULL), name,
4690 howto_table_ext[r_type].name,
4691 r_addend, input_bfd, input_section, r_addr)))
4703 /* Link an a.out section into the output file. */
4706 aout_link_input_section (struct aout_final_link_info *flaginfo,
4708 asection *input_section,
4709 file_ptr *reloff_ptr,
4710 bfd_size_type rel_size)
4712 bfd_size_type input_size;
4715 /* Get the section contents. */
4716 input_size = input_section->size;
4717 if (! bfd_get_section_contents (input_bfd, input_section,
4718 (void *) flaginfo->contents,
4719 (file_ptr) 0, input_size))
4722 /* Read in the relocs if we haven't already done it. */
4723 if (aout_section_data (input_section) != NULL
4724 && aout_section_data (input_section)->relocs != NULL)
4725 relocs = aout_section_data (input_section)->relocs;
4728 relocs = flaginfo->relocs;
4731 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4732 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4737 /* Relocate the section contents. */
4738 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4740 if (! aout_link_input_section_std (flaginfo, input_bfd, input_section,
4741 (struct reloc_std_external *) relocs,
4742 rel_size, flaginfo->contents))
4747 if (! aout_link_input_section_ext (flaginfo, input_bfd, input_section,
4748 (struct reloc_ext_external *) relocs,
4749 rel_size, flaginfo->contents))
4753 /* Write out the section contents. */
4754 if (! bfd_set_section_contents (flaginfo->output_bfd,
4755 input_section->output_section,
4756 (void *) flaginfo->contents,
4757 (file_ptr) input_section->output_offset,
4761 /* If we are producing relocatable output, the relocs were
4762 modified, and we now write them out. */
4763 if (flaginfo->info->relocatable && rel_size > 0)
4765 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4767 if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size)
4769 *reloff_ptr += rel_size;
4771 /* Assert that the relocs have not run into the symbols, and
4772 that if these are the text relocs they have not run into the
4774 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
4775 && (reloff_ptr != &flaginfo->treloff
4777 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
4783 /* Adjust and write out the symbols for an a.out file. Set the new
4784 symbol indices into a symbol_map. */
4787 aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd)
4790 bfd_size_type sym_count;
4792 enum bfd_link_strip strip;
4793 enum bfd_link_discard discard;
4794 struct external_nlist *outsym;
4795 bfd_size_type strtab_index;
4796 struct external_nlist *sym;
4797 struct external_nlist *sym_end;
4798 struct aout_link_hash_entry **sym_hash;
4801 bfd_boolean skip_next;
4803 output_bfd = flaginfo->output_bfd;
4804 sym_count = obj_aout_external_sym_count (input_bfd);
4805 strings = obj_aout_external_strings (input_bfd);
4806 strip = flaginfo->info->strip;
4807 discard = flaginfo->info->discard;
4808 outsym = flaginfo->output_syms;
4810 /* First write out a symbol for this object file, unless we are
4811 discarding such symbols. */
4812 if (strip != strip_all
4813 && (strip != strip_some
4814 || bfd_hash_lookup (flaginfo->info->keep_hash, input_bfd->filename,
4815 FALSE, FALSE) != NULL)
4816 && discard != discard_all)
4818 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4819 H_PUT_8 (output_bfd, 0, outsym->e_other);
4820 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4821 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
4822 input_bfd->filename, FALSE);
4823 if (strtab_index == (bfd_size_type) -1)
4825 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4826 PUT_WORD (output_bfd,
4827 (bfd_get_section_vma (output_bfd,
4828 obj_textsec (input_bfd)->output_section)
4829 + obj_textsec (input_bfd)->output_offset),
4831 ++obj_aout_external_sym_count (output_bfd);
4837 sym = obj_aout_external_syms (input_bfd);
4838 sym_end = sym + sym_count;
4839 sym_hash = obj_aout_sym_hashes (input_bfd);
4840 symbol_map = flaginfo->symbol_map;
4841 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4842 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4846 struct aout_link_hash_entry *h;
4852 /* We set *symbol_map to 0 above for all symbols. If it has
4853 already been set to -1 for this symbol, it means that we are
4854 discarding it because it appears in a duplicate header file.
4855 See the N_BINCL code below. */
4856 if (*symbol_map == -1)
4859 /* Initialize *symbol_map to -1, which means that the symbol was
4860 not copied into the output file. We will change it later if
4861 we do copy the symbol over. */
4864 type = H_GET_8 (input_bfd, sym->e_type);
4865 name = strings + GET_WORD (input_bfd, sym->e_strx);
4871 /* Pass this symbol through. It is the target of an
4872 indirect or warning symbol. */
4873 val = GET_WORD (input_bfd, sym->e_value);
4878 /* Skip this symbol, which is the target of an indirect
4879 symbol that we have changed to no longer be an indirect
4886 struct aout_link_hash_entry *hresolve;
4888 /* We have saved the hash table entry for this symbol, if
4889 there is one. Note that we could just look it up again
4890 in the hash table, provided we first check that it is an
4894 /* Use the name from the hash table, in case the symbol was
4897 && h->root.type != bfd_link_hash_warning)
4898 name = h->root.root.string;
4900 /* If this is an indirect or warning symbol, then change
4901 hresolve to the base symbol. We also change *sym_hash so
4902 that the relocation routines relocate against the real
4905 if (h != (struct aout_link_hash_entry *) NULL
4906 && (h->root.type == bfd_link_hash_indirect
4907 || h->root.type == bfd_link_hash_warning))
4909 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4910 while (hresolve->root.type == bfd_link_hash_indirect
4911 || hresolve->root.type == bfd_link_hash_warning)
4912 hresolve = ((struct aout_link_hash_entry *)
4913 hresolve->root.u.i.link);
4914 *sym_hash = hresolve;
4917 /* If the symbol has already been written out, skip it. */
4921 if ((type & N_TYPE) == N_INDR
4922 || type == N_WARNING)
4924 *symbol_map = h->indx;
4928 /* See if we are stripping this symbol. */
4934 case strip_debugger:
4935 if ((type & N_STAB) != 0)
4939 if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE)
4954 /* Get the value of the symbol. */
4955 if ((type & N_TYPE) == N_TEXT
4957 symsec = obj_textsec (input_bfd);
4958 else if ((type & N_TYPE) == N_DATA
4960 symsec = obj_datasec (input_bfd);
4961 else if ((type & N_TYPE) == N_BSS
4963 symsec = obj_bsssec (input_bfd);
4964 else if ((type & N_TYPE) == N_ABS
4966 symsec = bfd_abs_section_ptr;
4967 else if (((type & N_TYPE) == N_INDR
4968 && (hresolve == NULL
4969 || (hresolve->root.type != bfd_link_hash_defined
4970 && hresolve->root.type != bfd_link_hash_defweak
4971 && hresolve->root.type != bfd_link_hash_common)))
4972 || type == N_WARNING)
4974 /* Pass the next symbol through unchanged. The
4975 condition above for indirect symbols is so that if
4976 the indirect symbol was defined, we output it with
4977 the correct definition so the debugger will
4980 val = GET_WORD (input_bfd, sym->e_value);
4983 else if ((type & N_STAB) != 0)
4985 val = GET_WORD (input_bfd, sym->e_value);
4990 /* If we get here with an indirect symbol, it means that
4991 we are outputting it with a real definition. In such
4992 a case we do not want to output the next symbol,
4993 which is the target of the indirection. */
4994 if ((type & N_TYPE) == N_INDR)
4999 /* We need to get the value from the hash table. We use
5000 hresolve so that if we have defined an indirect
5001 symbol we output the final definition. */
5004 switch (type & N_TYPE)
5007 symsec = obj_textsec (input_bfd);
5010 symsec = obj_datasec (input_bfd);
5013 symsec = obj_bsssec (input_bfd);
5016 symsec = bfd_abs_section_ptr;
5023 else if (hresolve->root.type == bfd_link_hash_defined
5024 || hresolve->root.type == bfd_link_hash_defweak)
5026 asection *input_section;
5027 asection *output_section;
5029 /* This case usually means a common symbol which was
5030 turned into a defined symbol. */
5031 input_section = hresolve->root.u.def.section;
5032 output_section = input_section->output_section;
5033 BFD_ASSERT (bfd_is_abs_section (output_section)
5034 || output_section->owner == output_bfd);
5035 val = (hresolve->root.u.def.value
5036 + bfd_get_section_vma (output_bfd, output_section)
5037 + input_section->output_offset);
5039 /* Get the correct type based on the section. If
5040 this is a constructed set, force it to be
5041 globally visible. */
5050 if (output_section == obj_textsec (output_bfd))
5051 type |= (hresolve->root.type == bfd_link_hash_defined
5054 else if (output_section == obj_datasec (output_bfd))
5055 type |= (hresolve->root.type == bfd_link_hash_defined
5058 else if (output_section == obj_bsssec (output_bfd))
5059 type |= (hresolve->root.type == bfd_link_hash_defined
5063 type |= (hresolve->root.type == bfd_link_hash_defined
5067 else if (hresolve->root.type == bfd_link_hash_common)
5068 val = hresolve->root.u.c.size;
5069 else if (hresolve->root.type == bfd_link_hash_undefweak)
5078 val = (symsec->output_section->vma
5079 + symsec->output_offset
5080 + (GET_WORD (input_bfd, sym->e_value)
5083 /* If this is a global symbol set the written flag, and if
5084 it is a local symbol see if we should discard it. */
5088 h->indx = obj_aout_external_sym_count (output_bfd);
5090 else if ((type & N_TYPE) != N_SETT
5091 && (type & N_TYPE) != N_SETD
5092 && (type & N_TYPE) != N_SETB
5093 && (type & N_TYPE) != N_SETA)
5098 case discard_sec_merge:
5101 if ((type & N_STAB) == 0
5102 && bfd_is_local_label_name (input_bfd, name))
5116 /* An N_BINCL symbol indicates the start of the stabs
5117 entries for a header file. We need to scan ahead to the
5118 next N_EINCL symbol, ignoring nesting, adding up all the
5119 characters in the symbol names, not including the file
5120 numbers in types (the first number after an open
5122 if (type == (int) N_BINCL)
5124 struct external_nlist *incl_sym;
5126 struct aout_link_includes_entry *incl_entry;
5127 struct aout_link_includes_totals *t;
5131 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5135 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5136 if (incl_type == (int) N_EINCL)
5142 else if (incl_type == (int) N_BINCL)
5148 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5149 for (; *s != '\0'; s++)
5154 /* Skip the file number. */
5156 while (ISDIGIT (*s))
5164 /* If we have already included a header file with the
5165 same value, then replace this one with an N_EXCL
5167 copy = (bfd_boolean) (! flaginfo->info->keep_memory);
5168 incl_entry = aout_link_includes_lookup (&flaginfo->includes,
5170 if (incl_entry == NULL)
5172 for (t = incl_entry->totals; t != NULL; t = t->next)
5173 if (t->total == val)
5177 /* This is the first time we have seen this header
5178 file with this set of stabs strings. */
5179 t = (struct aout_link_includes_totals *)
5180 bfd_hash_allocate (&flaginfo->includes.root,
5185 t->next = incl_entry->totals;
5186 incl_entry->totals = t;
5192 /* This is a duplicate header file. We must change
5193 it to be an N_EXCL entry, and mark all the
5194 included symbols to prevent outputting them. */
5195 type = (int) N_EXCL;
5198 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5200 incl_sym++, incl_map++)
5204 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5205 if (incl_type == (int) N_EINCL)
5214 else if (incl_type == (int) N_BINCL)
5223 /* Copy this symbol into the list of symbols we are going to
5225 H_PUT_8 (output_bfd, type, outsym->e_type);
5226 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5227 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5229 if (! flaginfo->info->keep_memory)
5231 /* name points into a string table which we are going to
5232 free. If there is a hash table entry, use that string.
5233 Otherwise, copy name into memory. */
5235 name = h->root.root.string;
5239 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
5241 if (strtab_index == (bfd_size_type) -1)
5243 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5244 PUT_WORD (output_bfd, val, outsym->e_value);
5245 *symbol_map = obj_aout_external_sym_count (output_bfd);
5246 ++obj_aout_external_sym_count (output_bfd);
5250 /* Write out the output symbols we have just constructed. */
5251 if (outsym > flaginfo->output_syms)
5253 bfd_size_type outsym_size;
5255 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0)
5257 outsym_size = outsym - flaginfo->output_syms;
5258 outsym_size *= EXTERNAL_NLIST_SIZE;
5259 if (bfd_bwrite ((void *) flaginfo->output_syms, outsym_size, output_bfd)
5262 flaginfo->symoff += outsym_size;
5268 /* Link an a.out input BFD into the output file. */
5271 aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd)
5273 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5275 /* If this is a dynamic object, it may need special handling. */
5276 if ((input_bfd->flags & DYNAMIC) != 0
5277 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5278 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5279 (flaginfo->info, input_bfd));
5281 /* Get the symbols. We probably have them already, unless
5282 flaginfo->info->keep_memory is FALSE. */
5283 if (! aout_get_external_symbols (input_bfd))
5286 /* Write out the symbols and get a map of the new indices. The map
5287 is placed into flaginfo->symbol_map. */
5288 if (! aout_link_write_symbols (flaginfo, input_bfd))
5291 /* Relocate and write out the sections. These functions use the
5292 symbol map created by aout_link_write_symbols. The linker_mark
5293 field will be set if these sections are to be included in the
5294 link, which will normally be the case. */
5295 if (obj_textsec (input_bfd)->linker_mark)
5297 if (! aout_link_input_section (flaginfo, input_bfd,
5298 obj_textsec (input_bfd),
5300 exec_hdr (input_bfd)->a_trsize))
5303 if (obj_datasec (input_bfd)->linker_mark)
5305 if (! aout_link_input_section (flaginfo, input_bfd,
5306 obj_datasec (input_bfd),
5308 exec_hdr (input_bfd)->a_drsize))
5312 /* If we are not keeping memory, we don't need the symbols any
5313 longer. We still need them if we are keeping memory, because the
5314 strings in the hash table point into them. */
5315 if (! flaginfo->info->keep_memory)
5317 if (! aout_link_free_symbols (input_bfd))
5324 /* Do the final link step. This is called on the output BFD. The
5325 INFO structure should point to a list of BFDs linked through the
5326 link.next field which can be used to find each BFD which takes part
5327 in the output. Also, each section in ABFD should point to a list
5328 of bfd_link_order structures which list all the input sections for
5329 the output section. */
5332 NAME (aout, final_link) (bfd *abfd,
5333 struct bfd_link_info *info,
5334 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5336 struct aout_final_link_info aout_info;
5337 bfd_boolean includes_hash_initialized = FALSE;
5339 bfd_size_type trsize, drsize;
5340 bfd_size_type max_contents_size;
5341 bfd_size_type max_relocs_size;
5342 bfd_size_type max_sym_count;
5343 bfd_size_type text_size;
5345 struct bfd_link_order *p;
5347 bfd_boolean have_link_order_relocs;
5350 abfd->flags |= DYNAMIC;
5352 aout_info.info = info;
5353 aout_info.output_bfd = abfd;
5354 aout_info.contents = NULL;
5355 aout_info.relocs = NULL;
5356 aout_info.symbol_map = NULL;
5357 aout_info.output_syms = NULL;
5359 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5360 aout_link_includes_newfunc,
5361 sizeof (struct aout_link_includes_entry),
5364 includes_hash_initialized = TRUE;
5366 /* Figure out the largest section size. Also, if generating
5367 relocatable output, count the relocs. */
5370 max_contents_size = 0;
5371 max_relocs_size = 0;
5373 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5377 if (info->relocatable)
5379 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5381 trsize += exec_hdr (sub)->a_trsize;
5382 drsize += exec_hdr (sub)->a_drsize;
5386 /* FIXME: We need to identify the .text and .data sections
5387 and call get_reloc_upper_bound and canonicalize_reloc to
5388 work out the number of relocs needed, and then multiply
5389 by the reloc size. */
5390 (*_bfd_error_handler)
5391 (_("%s: relocatable link from %s to %s not supported"),
5392 bfd_get_filename (abfd),
5393 sub->xvec->name, abfd->xvec->name);
5394 bfd_set_error (bfd_error_invalid_operation);
5399 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5401 sz = obj_textsec (sub)->size;
5402 if (sz > max_contents_size)
5403 max_contents_size = sz;
5404 sz = obj_datasec (sub)->size;
5405 if (sz > max_contents_size)
5406 max_contents_size = sz;
5408 sz = exec_hdr (sub)->a_trsize;
5409 if (sz > max_relocs_size)
5410 max_relocs_size = sz;
5411 sz = exec_hdr (sub)->a_drsize;
5412 if (sz > max_relocs_size)
5413 max_relocs_size = sz;
5415 sz = obj_aout_external_sym_count (sub);
5416 if (sz > max_sym_count)
5421 if (info->relocatable)
5423 if (obj_textsec (abfd) != NULL)
5424 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5425 ->map_head.link_order)
5426 * obj_reloc_entry_size (abfd));
5427 if (obj_datasec (abfd) != NULL)
5428 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5429 ->map_head.link_order)
5430 * obj_reloc_entry_size (abfd));
5433 exec_hdr (abfd)->a_trsize = trsize;
5434 exec_hdr (abfd)->a_drsize = drsize;
5436 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5438 /* Adjust the section sizes and vmas according to the magic number.
5439 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5440 filepos for each section. */
5441 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
5444 /* The relocation and symbol file positions differ among a.out
5445 targets. We are passed a callback routine from the backend
5446 specific code to handle this.
5447 FIXME: At this point we do not know how much space the symbol
5448 table will require. This will not work for any (nonstandard)
5449 a.out target that needs to know the symbol table size before it
5450 can compute the relocation file positions. This may or may not
5451 be the case for the hp300hpux target, for example. */
5452 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5454 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5455 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5456 obj_sym_filepos (abfd) = aout_info.symoff;
5458 /* We keep a count of the symbols as we output them. */
5459 obj_aout_external_sym_count (abfd) = 0;
5461 /* We accumulate the string table as we write out the symbols. */
5462 aout_info.strtab = _bfd_stringtab_init ();
5463 if (aout_info.strtab == NULL)
5466 /* Allocate buffers to hold section contents and relocs. */
5467 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
5468 aout_info.relocs = bfd_malloc (max_relocs_size);
5469 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int));
5470 aout_info.output_syms = (struct external_nlist *)
5471 bfd_malloc ((max_sym_count + 1) * sizeof (struct external_nlist));
5472 if ((aout_info.contents == NULL && max_contents_size != 0)
5473 || (aout_info.relocs == NULL && max_relocs_size != 0)
5474 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5475 || aout_info.output_syms == NULL)
5478 /* If we have a symbol named __DYNAMIC, force it out now. This is
5479 required by SunOS. Doing this here rather than in sunos.c is a
5480 hack, but it's easier than exporting everything which would be
5483 struct aout_link_hash_entry *h;
5485 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5486 FALSE, FALSE, FALSE);
5488 aout_link_write_other_symbol (&h->root.root, &aout_info);
5491 /* The most time efficient way to do the link would be to read all
5492 the input object files into memory and then sort out the
5493 information into the output file. Unfortunately, that will
5494 probably use too much memory. Another method would be to step
5495 through everything that composes the text section and write it
5496 out, and then everything that composes the data section and write
5497 it out, and then write out the relocs, and then write out the
5498 symbols. Unfortunately, that requires reading stuff from each
5499 input file several times, and we will not be able to keep all the
5500 input files open simultaneously, and reopening them will be slow.
5502 What we do is basically process one input file at a time. We do
5503 everything we need to do with an input file once--copy over the
5504 section contents, handle the relocation information, and write
5505 out the symbols--and then we throw away the information we read
5506 from it. This approach requires a lot of lseeks of the output
5507 file, which is unfortunate but still faster than reopening a lot
5510 We use the output_has_begun field of the input BFDs to see
5511 whether we have already handled it. */
5512 for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
5513 sub->output_has_begun = FALSE;
5515 /* Mark all sections which are to be included in the link. This
5516 will normally be every section. We need to do this so that we
5517 can identify any sections which the linker has decided to not
5519 for (o = abfd->sections; o != NULL; o = o->next)
5521 for (p = o->map_head.link_order; p != NULL; p = p->next)
5522 if (p->type == bfd_indirect_link_order)
5523 p->u.indirect.section->linker_mark = TRUE;
5526 have_link_order_relocs = FALSE;
5527 for (o = abfd->sections; o != NULL; o = o->next)
5529 for (p = o->map_head.link_order;
5533 if (p->type == bfd_indirect_link_order
5534 && (bfd_get_flavour (p->u.indirect.section->owner)
5535 == bfd_target_aout_flavour))
5539 input_bfd = p->u.indirect.section->owner;
5540 if (! input_bfd->output_has_begun)
5542 if (! aout_link_input_bfd (&aout_info, input_bfd))
5544 input_bfd->output_has_begun = TRUE;
5547 else if (p->type == bfd_section_reloc_link_order
5548 || p->type == bfd_symbol_reloc_link_order)
5550 /* These are handled below. */
5551 have_link_order_relocs = TRUE;
5555 if (! _bfd_default_link_order (abfd, info, o, p))
5561 /* Write out any symbols that we have not already written out. */
5562 bfd_hash_traverse (&info->hash->table,
5563 aout_link_write_other_symbol,
5566 /* Now handle any relocs we were asked to create by the linker.
5567 These did not come from any input file. We must do these after
5568 we have written out all the symbols, so that we know the symbol
5570 if (have_link_order_relocs)
5572 for (o = abfd->sections; o != NULL; o = o->next)
5574 for (p = o->map_head.link_order;
5578 if (p->type == bfd_section_reloc_link_order
5579 || p->type == bfd_symbol_reloc_link_order)
5581 if (! aout_link_reloc_link_order (&aout_info, o, p))
5588 if (aout_info.contents != NULL)
5590 free (aout_info.contents);
5591 aout_info.contents = NULL;
5593 if (aout_info.relocs != NULL)
5595 free (aout_info.relocs);
5596 aout_info.relocs = NULL;
5598 if (aout_info.symbol_map != NULL)
5600 free (aout_info.symbol_map);
5601 aout_info.symbol_map = NULL;
5603 if (aout_info.output_syms != NULL)
5605 free (aout_info.output_syms);
5606 aout_info.output_syms = NULL;
5608 if (includes_hash_initialized)
5610 bfd_hash_table_free (&aout_info.includes.root);
5611 includes_hash_initialized = FALSE;
5614 /* Finish up any dynamic linking we may be doing. */
5615 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5617 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5621 /* Update the header information. */
5622 abfd->symcount = obj_aout_external_sym_count (abfd);
5623 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5624 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5625 obj_textsec (abfd)->reloc_count =
5626 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5627 obj_datasec (abfd)->reloc_count =
5628 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5630 /* Write out the string table, unless there are no symbols. */
5631 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
5633 if (abfd->symcount > 0)
5635 if (!emit_stringtab (abfd, aout_info.strtab))
5640 bfd_byte b[BYTES_IN_WORD];
5642 memset (b, 0, BYTES_IN_WORD);
5643 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
5650 if (aout_info.contents != NULL)
5651 free (aout_info.contents);
5652 if (aout_info.relocs != NULL)
5653 free (aout_info.relocs);
5654 if (aout_info.symbol_map != NULL)
5655 free (aout_info.symbol_map);
5656 if (aout_info.output_syms != NULL)
5657 free (aout_info.output_syms);
5658 if (includes_hash_initialized)
5659 bfd_hash_table_free (&aout_info.includes.root);