1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
30 BFD supports a number of different flavours of a.out format,
31 though the major differences are only the sizes of the
32 structures on disk, and the shape of the relocation
35 The support is split into a basic support file @file{aoutx.h}
36 and other files which derive functions from the base. One
37 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
38 adds to the basic a.out functions support for sun3, sun4, 386
39 and 29k a.out files, to create a target jump vector for a
42 This information is further split out into more specific files
43 for each machine, including @file{sunos.c} for sun3 and sun4,
44 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
45 demonstration of a 64 bit a.out format.
47 The base file @file{aoutx.h} defines general mechanisms for
48 reading and writing records to and from disk and various
49 other methods which BFD requires. It is included by
50 @file{aout32.c} and @file{aout64.c} to form the names
51 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
53 As an example, this is what goes on to make the back end for a
54 sun4, from @file{aout32.c}:
56 | #define ARCH_SIZE 32
62 | aout_32_canonicalize_reloc
63 | aout_32_find_nearest_line
65 | aout_32_get_reloc_upper_bound
70 | #define TARGET_NAME "a.out-sunos-big"
71 | #define VECNAME sunos_big_vec
74 requires all the names from @file{aout32.c}, and produces the jump vector
78 The file @file{host-aout.c} is a special case. It is for a large set
79 of hosts that use ``more or less standard'' a.out files, and
80 for which cross-debugging is not interesting. It uses the
81 standard 32-bit a.out support routines, but determines the
82 file offsets and addresses of the text, data, and BSS
83 sections, the machine architecture and machine type, and the
84 entry point address, in a host-dependent manner. Once these
85 values have been determined, generic code is used to handle
88 When porting it to run on a new system, you must supply:
92 | HOST_MACHINE_ARCH (optional)
93 | HOST_MACHINE_MACHINE (optional)
94 | HOST_TEXT_START_ADDR
97 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
98 values, plus the structures and macros defined in @file{a.out.h} on
99 your host system, will produce a BFD target that will access
100 ordinary a.out files on your host. To configure a new machine
101 to use @file{host-aout.c}, specify:
103 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
104 | TDEPFILES= host-aout.o trad-core.o
106 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
108 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
109 configuration is selected. */
112 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
113 Doesn't matter what the setting of WP_TEXT is on output, but it'll
115 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
116 * Any BFD with both flags clear is OMAGIC.
117 (Just want to make these explicit, so the conditions tested in this
118 file make sense if you're more familiar with a.out than with BFD.) */
120 #define KEEPIT udata.i
124 #include "safe-ctype.h"
129 #include "aout/aout64.h"
130 #include "aout/stab_gnu.h"
138 The file @file{aoutx.h} provides for both the @emph{standard}
139 and @emph{extended} forms of a.out relocation records.
141 The standard records contain only an
142 address, a symbol index, and a type field. The extended records
143 (used on 29ks and sparcs) also have a full integer for an
146 #ifndef CTOR_TABLE_RELOC_HOWTO
147 #define CTOR_TABLE_RELOC_IDX 2
148 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
149 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
150 ? howto_table_ext : howto_table_std) \
151 + CTOR_TABLE_RELOC_IDX)
154 #ifndef MY_swap_std_reloc_in
155 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
158 #ifndef MY_swap_ext_reloc_in
159 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
162 #ifndef MY_swap_std_reloc_out
163 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
166 #ifndef MY_swap_ext_reloc_out
167 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
170 #ifndef MY_final_link_relocate
171 #define MY_final_link_relocate _bfd_final_link_relocate
174 #ifndef MY_relocate_contents
175 #define MY_relocate_contents _bfd_relocate_contents
178 #define howto_table_ext NAME (aout, ext_howto_table)
179 #define howto_table_std NAME (aout, std_howto_table)
181 reloc_howto_type howto_table_ext[] =
183 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
184 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE),
185 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE),
186 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE),
187 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE),
188 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE),
189 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE),
190 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE),
191 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE),
192 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE),
193 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE),
194 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE),
195 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE),
196 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE),
197 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE),
198 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE),
199 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE),
200 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE),
201 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE),
202 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE),
203 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE),
204 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE),
205 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE),
206 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE),
207 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE),
208 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
209 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
210 #define RELOC_SPARC_REV32 RELOC_WDISP19
211 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE),
214 /* Convert standard reloc records to "arelent" format (incl byte swap). */
216 reloc_howto_type howto_table_std[] =
218 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
219 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
220 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
221 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
222 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
223 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
224 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
225 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
226 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
227 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
228 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
229 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
235 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
251 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
259 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
262 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
265 NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
267 #define EXT(i, j) case i: return & howto_table_ext [j]
268 #define STD(i, j) case i: return & howto_table_std [j]
269 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
271 if (code == BFD_RELOC_CTOR)
272 switch (bfd_get_arch_info (abfd)->bits_per_address)
285 EXT (BFD_RELOC_8, 0);
286 EXT (BFD_RELOC_16, 1);
287 EXT (BFD_RELOC_32, 2);
288 EXT (BFD_RELOC_HI22, 8);
289 EXT (BFD_RELOC_LO10, 11);
290 EXT (BFD_RELOC_32_PCREL_S2, 6);
291 EXT (BFD_RELOC_SPARC_WDISP22, 7);
292 EXT (BFD_RELOC_SPARC13, 10);
293 EXT (BFD_RELOC_SPARC_GOT10, 14);
294 EXT (BFD_RELOC_SPARC_BASE13, 15);
295 EXT (BFD_RELOC_SPARC_GOT13, 15);
296 EXT (BFD_RELOC_SPARC_GOT22, 16);
297 EXT (BFD_RELOC_SPARC_PC10, 17);
298 EXT (BFD_RELOC_SPARC_PC22, 18);
299 EXT (BFD_RELOC_SPARC_WPLT30, 19);
300 EXT (BFD_RELOC_SPARC_REV32, 26);
308 STD (BFD_RELOC_8, 0);
309 STD (BFD_RELOC_16, 1);
310 STD (BFD_RELOC_32, 2);
311 STD (BFD_RELOC_8_PCREL, 4);
312 STD (BFD_RELOC_16_PCREL, 5);
313 STD (BFD_RELOC_32_PCREL, 6);
314 STD (BFD_RELOC_16_BASEREL, 9);
315 STD (BFD_RELOC_32_BASEREL, 10);
322 NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name)
324 unsigned int i, size;
325 reloc_howto_type *howto_table;
327 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE)
329 howto_table = howto_table_ext;
330 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]);
334 howto_table = howto_table_std;
335 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]);
338 for (i = 0; i < size; i++)
339 if (howto_table[i].name != NULL
340 && strcasecmp (howto_table[i].name, r_name) == 0)
341 return &howto_table[i];
348 Internal entry points
351 @file{aoutx.h} exports several routines for accessing the
352 contents of an a.out file, which are gathered and exported in
353 turn by various format specific files (eg sunos.c).
358 aout_@var{size}_swap_exec_header_in
361 void aout_@var{size}_swap_exec_header_in,
363 struct external_exec *bytes,
364 struct internal_exec *execp);
367 Swap the information in an executable header @var{raw_bytes} taken
368 from a raw byte stream memory image into the internal exec header
369 structure @var{execp}.
372 #ifndef NAME_swap_exec_header_in
374 NAME (aout, swap_exec_header_in) (bfd *abfd,
375 struct external_exec *bytes,
376 struct internal_exec *execp)
378 /* The internal_exec structure has some fields that are unused in this
379 configuration (IE for i960), so ensure that all such uninitialized
380 fields are zero'd out. There are places where two of these structs
381 are memcmp'd, and thus the contents do matter. */
382 memset ((void *) execp, 0, sizeof (struct internal_exec));
383 /* Now fill in fields in the execp, from the bytes in the raw data. */
384 execp->a_info = H_GET_32 (abfd, bytes->e_info);
385 execp->a_text = GET_WORD (abfd, bytes->e_text);
386 execp->a_data = GET_WORD (abfd, bytes->e_data);
387 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
388 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
389 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
390 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
391 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
393 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
398 aout_@var{size}_swap_exec_header_out
401 void aout_@var{size}_swap_exec_header_out
403 struct internal_exec *execp,
404 struct external_exec *raw_bytes);
407 Swap the information in an internal exec header structure
408 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
411 NAME (aout, swap_exec_header_out) (bfd *abfd,
412 struct internal_exec *execp,
413 struct external_exec *bytes)
415 /* Now fill in fields in the raw data, from the fields in the exec struct. */
416 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
417 PUT_WORD (abfd, execp->a_text , bytes->e_text);
418 PUT_WORD (abfd, execp->a_data , bytes->e_data);
419 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
420 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
421 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
422 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
423 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
426 /* Make all the section for an a.out file. */
429 NAME (aout, make_sections) (bfd *abfd)
431 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL)
433 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL)
435 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL)
442 aout_@var{size}_some_aout_object_p
445 const bfd_target *aout_@var{size}_some_aout_object_p
447 struct internal_exec *execp,
448 const bfd_target *(*callback_to_real_object_p) (bfd *));
451 Some a.out variant thinks that the file open in @var{abfd}
452 checking is an a.out file. Do some more checking, and set up
453 for access if it really is. Call back to the calling
454 environment's "finish up" function just before returning, to
455 handle any last-minute setup.
459 NAME (aout, some_aout_object_p) (bfd *abfd,
460 struct internal_exec *execp,
461 const bfd_target *(*callback_to_real_object_p) (bfd *))
463 struct aout_data_struct *rawptr, *oldrawptr;
464 const bfd_target *result;
465 bfd_size_type amt = sizeof (* rawptr);
467 rawptr = bfd_zalloc (abfd, amt);
471 oldrawptr = abfd->tdata.aout_data;
472 abfd->tdata.aout_data = rawptr;
474 /* Copy the contents of the old tdata struct.
475 In particular, we want the subformat, since for hpux it was set in
476 hp300hpux.c:swap_exec_header_in and will be used in
477 hp300hpux.c:callback. */
478 if (oldrawptr != NULL)
479 *abfd->tdata.aout_data = *oldrawptr;
481 abfd->tdata.aout_data->a.hdr = &rawptr->e;
482 /* Copy in the internal_exec struct. */
483 *(abfd->tdata.aout_data->a.hdr) = *execp;
484 execp = abfd->tdata.aout_data->a.hdr;
486 /* Set the file flags. */
487 abfd->flags = BFD_NO_FLAGS;
488 if (execp->a_drsize || execp->a_trsize)
489 abfd->flags |= HAS_RELOC;
490 /* Setting of EXEC_P has been deferred to the bottom of this function. */
492 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
493 if (N_DYNAMIC (*execp))
494 abfd->flags |= DYNAMIC;
496 if (N_MAGIC (*execp) == ZMAGIC)
498 abfd->flags |= D_PAGED | WP_TEXT;
499 adata (abfd).magic = z_magic;
501 else if (N_MAGIC (*execp) == QMAGIC)
503 abfd->flags |= D_PAGED | WP_TEXT;
504 adata (abfd).magic = z_magic;
505 adata (abfd).subformat = q_magic_format;
507 else if (N_MAGIC (*execp) == NMAGIC)
509 abfd->flags |= WP_TEXT;
510 adata (abfd).magic = n_magic;
512 else if (N_MAGIC (*execp) == OMAGIC
513 || N_MAGIC (*execp) == BMAGIC)
514 adata (abfd).magic = o_magic;
516 /* Should have been checked with N_BADMAG before this routine
520 bfd_get_start_address (abfd) = execp->a_entry;
522 obj_aout_symbols (abfd) = NULL;
523 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
525 /* The default relocation entry size is that of traditional V7 Unix. */
526 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
528 /* The default symbol entry size is that of traditional Unix. */
529 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
532 bfd_init_window (&obj_aout_sym_window (abfd));
533 bfd_init_window (&obj_aout_string_window (abfd));
535 obj_aout_external_syms (abfd) = NULL;
536 obj_aout_external_strings (abfd) = NULL;
537 obj_aout_sym_hashes (abfd) = NULL;
539 if (! NAME (aout, make_sections) (abfd))
542 obj_datasec (abfd)->size = execp->a_data;
543 obj_bsssec (abfd)->size = execp->a_bss;
545 obj_textsec (abfd)->flags =
546 (execp->a_trsize != 0
547 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
548 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
549 obj_datasec (abfd)->flags =
550 (execp->a_drsize != 0
551 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
552 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
553 obj_bsssec (abfd)->flags = SEC_ALLOC;
555 #ifdef THIS_IS_ONLY_DOCUMENTATION
556 /* The common code can't fill in these things because they depend
557 on either the start address of the text segment, the rounding
558 up of virtual addresses between segments, or the starting file
559 position of the text segment -- all of which varies among different
560 versions of a.out. */
562 /* Call back to the format-dependent code to fill in the rest of the
563 fields and do any further cleanup. Things that should be filled
564 in by the callback: */
566 struct exec *execp = exec_hdr (abfd);
568 obj_textsec (abfd)->size = N_TXTSIZE (*execp);
569 /* Data and bss are already filled in since they're so standard. */
571 /* The virtual memory addresses of the sections. */
572 obj_textsec (abfd)->vma = N_TXTADDR (*execp);
573 obj_datasec (abfd)->vma = N_DATADDR (*execp);
574 obj_bsssec (abfd)->vma = N_BSSADDR (*execp);
576 /* The file offsets of the sections. */
577 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
578 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
580 /* The file offsets of the relocation info. */
581 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp);
582 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp);
584 /* The file offsets of the string table and symbol table. */
585 obj_str_filepos (abfd) = N_STROFF (*execp);
586 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
588 /* Determine the architecture and machine type of the object file. */
589 switch (N_MACHTYPE (*exec_hdr (abfd)))
592 abfd->obj_arch = bfd_arch_obscure;
596 adata (abfd)->page_size = TARGET_PAGE_SIZE;
597 adata (abfd)->segment_size = SEGMENT_SIZE;
598 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
602 /* The architecture is encoded in various ways in various a.out variants,
603 or is not encoded at all in some of them. The relocation size depends
604 on the architecture and the a.out variant. Finally, the return value
605 is the bfd_target vector in use. If an error occurs, return zero and
606 set bfd_error to the appropriate error code.
608 Formats such as b.out, which have additional fields in the a.out
609 header, should cope with them in this callback as well. */
610 #endif /* DOCUMENTATION */
612 result = (*callback_to_real_object_p) (abfd);
614 /* Now that the segment addresses have been worked out, take a better
615 guess at whether the file is executable. If the entry point
616 is within the text segment, assume it is. (This makes files
617 executable even if their entry point address is 0, as long as
618 their text starts at zero.).
620 This test had to be changed to deal with systems where the text segment
621 runs at a different location than the default. The problem is that the
622 entry address can appear to be outside the text segment, thus causing an
623 erroneous conclusion that the file isn't executable.
625 To fix this, we now accept any non-zero entry point as an indication of
626 executability. This will work most of the time, since only the linker
627 sets the entry point, and that is likely to be non-zero for most systems. */
629 if (execp->a_entry != 0
630 || (execp->a_entry >= obj_textsec (abfd)->vma
631 && execp->a_entry < (obj_textsec (abfd)->vma
632 + obj_textsec (abfd)->size)))
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 = 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_mips16:
790 case bfd_mach_mipsisa32:
791 case bfd_mach_mipsisa32r2:
793 case bfd_mach_mipsisa64:
794 case bfd_mach_mipsisa64r2:
795 case bfd_mach_mips_sb1:
796 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
797 arch_flags = M_MIPS2;
800 arch_flags = M_UNKNOWN;
808 case 0: arch_flags = M_NS32532; break;
809 case 32032: arch_flags = M_NS32032; break;
810 case 32532: arch_flags = M_NS32532; break;
811 default: arch_flags = M_UNKNOWN; break;
820 if (machine == 0 || machine == 255)
829 arch_flags = M_UNKNOWN;
832 if (arch_flags != M_UNKNOWN)
840 aout_@var{size}_set_arch_mach
843 bfd_boolean aout_@var{size}_set_arch_mach,
845 enum bfd_architecture arch,
846 unsigned long machine);
849 Set the architecture and the machine of the BFD @var{abfd} to the
850 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
851 can support the architecture required.
855 NAME (aout, set_arch_mach) (bfd *abfd,
856 enum bfd_architecture arch,
857 unsigned long machine)
859 if (! bfd_default_set_arch_mach (abfd, arch, machine))
862 if (arch != bfd_arch_unknown)
866 NAME (aout, machine_type) (arch, machine, &unknown);
871 /* Determine the size of a relocation entry. */
876 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
879 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
883 return (*aout_backend_info (abfd)->set_sizes) (abfd);
887 adjust_o_magic (bfd *abfd, struct internal_exec *execp)
889 file_ptr pos = adata (abfd).exec_bytes_size;
894 obj_textsec (abfd)->filepos = pos;
895 if (!obj_textsec (abfd)->user_set_vma)
896 obj_textsec (abfd)->vma = vma;
898 vma = obj_textsec (abfd)->vma;
900 pos += obj_textsec (abfd)->size;
901 vma += obj_textsec (abfd)->size;
904 if (!obj_datasec (abfd)->user_set_vma)
906 obj_textsec (abfd)->size += pad;
909 obj_datasec (abfd)->vma = vma;
912 vma = obj_datasec (abfd)->vma;
913 obj_datasec (abfd)->filepos = pos;
914 pos += obj_datasec (abfd)->size;
915 vma += obj_datasec (abfd)->size;
918 if (!obj_bsssec (abfd)->user_set_vma)
920 obj_datasec (abfd)->size += pad;
923 obj_bsssec (abfd)->vma = vma;
927 /* The VMA of the .bss section is set by the VMA of the
928 .data section plus the size of the .data section. We may
929 need to add padding bytes to make this true. */
930 pad = obj_bsssec (abfd)->vma - vma;
933 obj_datasec (abfd)->size += pad;
937 obj_bsssec (abfd)->filepos = pos;
939 /* Fix up the exec header. */
940 execp->a_text = obj_textsec (abfd)->size;
941 execp->a_data = obj_datasec (abfd)->size;
942 execp->a_bss = obj_bsssec (abfd)->size;
943 N_SET_MAGIC (*execp, OMAGIC);
947 adjust_z_magic (bfd *abfd, struct internal_exec *execp)
949 bfd_size_type data_pad, text_pad;
951 const struct aout_backend_data *abdp;
952 /* TRUE if text includes exec header. */
955 abdp = aout_backend_info (abfd);
959 && (abdp->text_includes_header
960 || obj_aout_subformat (abfd) == q_magic_format));
961 obj_textsec (abfd)->filepos = (ztih
962 ? adata (abfd).exec_bytes_size
963 : adata (abfd).zmagic_disk_block_size);
964 if (! obj_textsec (abfd)->user_set_vma)
966 /* ?? Do we really need to check for relocs here? */
967 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
970 ? (abdp->default_text_vma
971 + adata (abfd).exec_bytes_size)
972 : abdp->default_text_vma));
977 /* The .text section is being loaded at an unusual address. We
978 may need to pad it such that the .data section starts at a page
981 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
982 & (adata (abfd).page_size - 1));
984 text_pad = ((- obj_textsec (abfd)->vma)
985 & (adata (abfd).page_size - 1));
988 /* Find start of data. */
991 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size;
992 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
996 /* Note that if page_size == zmagic_disk_block_size, then
997 filepos == page_size, and this case is the same as the ztih
999 text_end = obj_textsec (abfd)->size;
1000 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1001 text_end += obj_textsec (abfd)->filepos;
1003 obj_textsec (abfd)->size += text_pad;
1004 text_end += text_pad;
1007 if (!obj_datasec (abfd)->user_set_vma)
1010 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size;
1011 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1013 if (abdp && abdp->zmagic_mapped_contiguous)
1015 asection * text = obj_textsec (abfd);
1016 asection * data = obj_datasec (abfd);
1018 text_pad = data->vma - (text->vma + text->size);
1019 /* Only pad the text section if the data
1020 section is going to be placed after it. */
1022 text->size += text_pad;
1024 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1025 + obj_textsec (abfd)->size);
1027 /* Fix up exec header while we're at it. */
1028 execp->a_text = obj_textsec (abfd)->size;
1029 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1030 execp->a_text += adata (abfd).exec_bytes_size;
1031 if (obj_aout_subformat (abfd) == q_magic_format)
1032 N_SET_MAGIC (*execp, QMAGIC);
1034 N_SET_MAGIC (*execp, ZMAGIC);
1036 /* Spec says data section should be rounded up to page boundary. */
1037 obj_datasec (abfd)->size
1038 = align_power (obj_datasec (abfd)->size,
1039 obj_bsssec (abfd)->alignment_power);
1040 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size,
1041 adata (abfd).page_size);
1042 data_pad = execp->a_data - obj_datasec (abfd)->size;
1045 if (!obj_bsssec (abfd)->user_set_vma)
1046 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1047 + obj_datasec (abfd)->size);
1048 /* If the BSS immediately follows the data section and extra space
1049 in the page is left after the data section, fudge data
1050 in the header so that the bss section looks smaller by that
1051 amount. We'll start the bss section there, and lie to the OS.
1052 (Note that a linker script, as well as the above assignment,
1053 could have explicitly set the BSS vma to immediately follow
1054 the data section.) */
1055 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1056 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size)
1057 execp->a_bss = (data_pad > obj_bsssec (abfd)->size
1058 ? 0 : obj_bsssec (abfd)->size - data_pad);
1060 execp->a_bss = obj_bsssec (abfd)->size;
1064 adjust_n_magic (bfd *abfd, struct internal_exec *execp)
1066 file_ptr pos = adata (abfd).exec_bytes_size;
1071 obj_textsec (abfd)->filepos = pos;
1072 if (!obj_textsec (abfd)->user_set_vma)
1073 obj_textsec (abfd)->vma = vma;
1075 vma = obj_textsec (abfd)->vma;
1076 pos += obj_textsec (abfd)->size;
1077 vma += obj_textsec (abfd)->size;
1080 obj_datasec (abfd)->filepos = pos;
1081 if (!obj_datasec (abfd)->user_set_vma)
1082 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1083 vma = obj_datasec (abfd)->vma;
1085 /* Since BSS follows data immediately, see if it needs alignment. */
1086 vma += obj_datasec (abfd)->size;
1087 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1088 obj_datasec (abfd)->size += pad;
1089 pos += obj_datasec (abfd)->size;
1092 if (!obj_bsssec (abfd)->user_set_vma)
1093 obj_bsssec (abfd)->vma = vma;
1095 vma = obj_bsssec (abfd)->vma;
1097 /* Fix up exec header. */
1098 execp->a_text = obj_textsec (abfd)->size;
1099 execp->a_data = obj_datasec (abfd)->size;
1100 execp->a_bss = obj_bsssec (abfd)->size;
1101 N_SET_MAGIC (*execp, NMAGIC);
1105 NAME (aout, adjust_sizes_and_vmas) (bfd *abfd,
1106 bfd_size_type *text_size,
1107 file_ptr *text_end ATTRIBUTE_UNUSED)
1109 struct internal_exec *execp = exec_hdr (abfd);
1111 if (! NAME (aout, make_sections) (abfd))
1114 if (adata (abfd).magic != undecided_magic)
1117 obj_textsec (abfd)->size =
1118 align_power (obj_textsec (abfd)->size,
1119 obj_textsec (abfd)->alignment_power);
1121 *text_size = obj_textsec (abfd)->size;
1122 /* Rule (heuristic) for when to pad to a new page. Note that there
1123 are (at least) two ways demand-paged (ZMAGIC) files have been
1124 handled. Most Berkeley-based systems start the text segment at
1125 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1126 segment right after the exec header; the latter is counted in the
1127 text segment size, and is paged in by the kernel with the rest of
1130 /* This perhaps isn't the right way to do this, but made it simpler for me
1131 to understand enough to implement it. Better would probably be to go
1132 right from BFD flags to alignment/positioning characteristics. But the
1133 old code was sloppy enough about handling the flags, and had enough
1134 other magic, that it was a little hard for me to understand. I think
1135 I understand it better now, but I haven't time to do the cleanup this
1138 if (abfd->flags & D_PAGED)
1139 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1140 adata (abfd).magic = z_magic;
1141 else if (abfd->flags & WP_TEXT)
1142 adata (abfd).magic = n_magic;
1144 adata (abfd).magic = o_magic;
1146 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1148 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1150 switch (adata (abfd).magic)
1152 case n_magic: str = "NMAGIC"; break;
1153 case o_magic: str = "OMAGIC"; break;
1154 case z_magic: str = "ZMAGIC"; break;
1159 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1160 obj_textsec (abfd)->alignment_power,
1161 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1162 obj_datasec (abfd)->alignment_power,
1163 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size,
1164 obj_bsssec (abfd)->alignment_power);
1168 switch (adata (abfd).magic)
1171 adjust_o_magic (abfd, execp);
1174 adjust_z_magic (abfd, execp);
1177 adjust_n_magic (abfd, execp);
1183 #ifdef BFD_AOUT_DEBUG
1184 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1185 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1186 obj_textsec (abfd)->filepos,
1187 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1188 obj_datasec (abfd)->filepos,
1189 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size);
1197 aout_@var{size}_new_section_hook
1200 bfd_boolean aout_@var{size}_new_section_hook,
1205 Called by the BFD in response to a @code{bfd_make_section}
1209 NAME (aout, new_section_hook) (bfd *abfd, asection *newsect)
1211 /* Align to double at least. */
1212 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
1214 if (bfd_get_format (abfd) == bfd_object)
1216 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1218 obj_textsec (abfd)= newsect;
1219 newsect->target_index = N_TEXT;
1221 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1223 obj_datasec (abfd) = newsect;
1224 newsect->target_index = N_DATA;
1226 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1228 obj_bsssec (abfd) = newsect;
1229 newsect->target_index = N_BSS;
1233 /* We allow more than three sections internally. */
1234 return _bfd_generic_new_section_hook (abfd, newsect);
1238 NAME (aout, set_section_contents) (bfd *abfd,
1240 const void * location,
1242 bfd_size_type count)
1245 bfd_size_type text_size;
1247 if (! abfd->output_has_begun)
1249 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1253 if (section == obj_bsssec (abfd))
1255 bfd_set_error (bfd_error_no_contents);
1259 if (section != obj_textsec (abfd)
1260 && section != obj_datasec (abfd))
1262 if (aout_section_merge_with_text_p (abfd, section))
1263 section->filepos = obj_textsec (abfd)->filepos +
1264 (section->vma - obj_textsec (abfd)->vma);
1267 (*_bfd_error_handler)
1268 (_("%s: can not represent section `%s' in a.out object file format"),
1269 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1270 bfd_set_error (bfd_error_nonrepresentable_section);
1277 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1278 || bfd_bwrite (location, count, abfd) != count)
1285 /* Read the external symbols from an a.out file. */
1288 aout_get_external_symbols (bfd *abfd)
1290 if (obj_aout_external_syms (abfd) == NULL)
1292 bfd_size_type count;
1293 struct external_nlist *syms;
1296 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1299 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
1300 exec_hdr (abfd)->a_syms,
1301 &obj_aout_sym_window (abfd), TRUE))
1303 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1305 /* We allocate using malloc to make the values easy to free
1306 later on. If we put them on the objalloc it might not be
1307 possible to free them. */
1308 syms = bfd_malloc (count * EXTERNAL_NLIST_SIZE);
1309 if (syms == NULL && count != 0)
1312 amt = exec_hdr (abfd)->a_syms;
1313 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1314 || bfd_bread (syms, amt, abfd) != amt)
1321 obj_aout_external_syms (abfd) = syms;
1322 obj_aout_external_sym_count (abfd) = count;
1325 if (obj_aout_external_strings (abfd) == NULL
1326 && exec_hdr (abfd)->a_syms != 0)
1328 unsigned char string_chars[BYTES_IN_WORD];
1329 bfd_size_type stringsize;
1331 bfd_size_type amt = BYTES_IN_WORD;
1333 /* Get the size of the strings. */
1334 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1335 || bfd_bread ((void *) string_chars, amt, abfd) != amt)
1337 stringsize = GET_WORD (abfd, string_chars);
1340 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1341 &obj_aout_string_window (abfd), TRUE))
1343 strings = (char *) obj_aout_string_window (abfd).data;
1345 strings = bfd_malloc (stringsize + 1);
1346 if (strings == NULL)
1349 /* Skip space for the string count in the buffer for convenience
1350 when using indexes. */
1351 amt = stringsize - BYTES_IN_WORD;
1352 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1359 /* Ensure that a zero index yields an empty string. */
1362 strings[stringsize - 1] = 0;
1364 obj_aout_external_strings (abfd) = strings;
1365 obj_aout_external_string_size (abfd) = stringsize;
1371 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1372 and symbol->value fields of CACHE_PTR will be set from the a.out
1373 nlist structure. This function is responsible for setting
1374 symbol->flags and symbol->section, and adjusting symbol->value. */
1377 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1381 if ((cache_ptr->type & N_STAB) != 0
1382 || cache_ptr->type == N_FN)
1386 /* This is a debugging symbol. */
1387 cache_ptr->symbol.flags = BSF_DEBUGGING;
1389 /* Work out the symbol section. */
1390 switch (cache_ptr->type & N_TYPE)
1394 sec = obj_textsec (abfd);
1397 sec = obj_datasec (abfd);
1400 sec = obj_bsssec (abfd);
1404 sec = bfd_abs_section_ptr;
1408 cache_ptr->symbol.section = sec;
1409 cache_ptr->symbol.value -= sec->vma;
1414 /* Get the default visibility. This does not apply to all types, so
1415 we just hold it in a local variable to use if wanted. */
1416 if ((cache_ptr->type & N_EXT) == 0)
1417 visible = BSF_LOCAL;
1419 visible = BSF_GLOBAL;
1421 switch (cache_ptr->type)
1424 case N_ABS: case N_ABS | N_EXT:
1425 cache_ptr->symbol.section = bfd_abs_section_ptr;
1426 cache_ptr->symbol.flags = visible;
1429 case N_UNDF | N_EXT:
1430 if (cache_ptr->symbol.value != 0)
1432 /* This is a common symbol. */
1433 cache_ptr->symbol.flags = BSF_GLOBAL;
1434 cache_ptr->symbol.section = bfd_com_section_ptr;
1438 cache_ptr->symbol.flags = 0;
1439 cache_ptr->symbol.section = bfd_und_section_ptr;
1443 case N_TEXT: case N_TEXT | N_EXT:
1444 cache_ptr->symbol.section = obj_textsec (abfd);
1445 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1446 cache_ptr->symbol.flags = visible;
1449 /* N_SETV symbols used to represent set vectors placed in the
1450 data section. They are no longer generated. Theoretically,
1451 it was possible to extract the entries and combine them with
1452 new ones, although I don't know if that was ever actually
1453 done. Unless that feature is restored, treat them as data
1455 case N_SETV: case N_SETV | N_EXT:
1456 case N_DATA: case N_DATA | N_EXT:
1457 cache_ptr->symbol.section = obj_datasec (abfd);
1458 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1459 cache_ptr->symbol.flags = visible;
1462 case N_BSS: case N_BSS | N_EXT:
1463 cache_ptr->symbol.section = obj_bsssec (abfd);
1464 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1465 cache_ptr->symbol.flags = visible;
1468 case N_SETA: case N_SETA | N_EXT:
1469 case N_SETT: case N_SETT | N_EXT:
1470 case N_SETD: case N_SETD | N_EXT:
1471 case N_SETB: case N_SETB | N_EXT:
1473 /* This code is no longer needed. It used to be used to make
1474 the linker handle set symbols, but they are now handled in
1475 the add_symbols routine instead. */
1476 switch (cache_ptr->type & N_TYPE)
1479 cache_ptr->symbol.section = bfd_abs_section_ptr;
1482 cache_ptr->symbol.section = obj_textsec (abfd);
1485 cache_ptr->symbol.section = obj_datasec (abfd);
1488 cache_ptr->symbol.section = obj_bsssec (abfd);
1492 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1497 /* This symbol is the text of a warning message. The next
1498 symbol is the symbol to associate the warning with. If a
1499 reference is made to that symbol, a warning is issued. */
1500 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1501 cache_ptr->symbol.section = bfd_abs_section_ptr;
1504 case N_INDR: case N_INDR | N_EXT:
1505 /* An indirect symbol. This consists of two symbols in a row.
1506 The first symbol is the name of the indirection. The second
1507 symbol is the name of the target. A reference to the first
1508 symbol becomes a reference to the second. */
1509 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1510 cache_ptr->symbol.section = bfd_ind_section_ptr;
1514 cache_ptr->symbol.section = bfd_und_section_ptr;
1515 cache_ptr->symbol.flags = BSF_WEAK;
1519 cache_ptr->symbol.section = bfd_abs_section_ptr;
1520 cache_ptr->symbol.flags = BSF_WEAK;
1524 cache_ptr->symbol.section = obj_textsec (abfd);
1525 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1526 cache_ptr->symbol.flags = BSF_WEAK;
1530 cache_ptr->symbol.section = obj_datasec (abfd);
1531 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1532 cache_ptr->symbol.flags = BSF_WEAK;
1536 cache_ptr->symbol.section = obj_bsssec (abfd);
1537 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1538 cache_ptr->symbol.flags = BSF_WEAK;
1545 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1548 translate_to_native_sym_flags (bfd *abfd,
1550 struct external_nlist *sym_pointer)
1552 bfd_vma value = cache_ptr->value;
1556 /* Mask out any existing type bits in case copying from one section
1558 sym_pointer->e_type[0] &= ~N_TYPE;
1560 sec = bfd_get_section (cache_ptr);
1565 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1567 (*_bfd_error_handler)
1568 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1569 bfd_get_filename (abfd),
1570 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1571 bfd_set_error (bfd_error_nonrepresentable_section);
1575 if (sec->output_section != NULL)
1577 off = sec->output_offset;
1578 sec = sec->output_section;
1581 if (bfd_is_abs_section (sec))
1582 sym_pointer->e_type[0] |= N_ABS;
1583 else if (sec == obj_textsec (abfd))
1584 sym_pointer->e_type[0] |= N_TEXT;
1585 else if (sec == obj_datasec (abfd))
1586 sym_pointer->e_type[0] |= N_DATA;
1587 else if (sec == obj_bsssec (abfd))
1588 sym_pointer->e_type[0] |= N_BSS;
1589 else if (bfd_is_und_section (sec))
1590 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1591 else if (bfd_is_ind_section (sec))
1592 sym_pointer->e_type[0] = N_INDR;
1593 else if (bfd_is_com_section (sec))
1594 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1597 if (aout_section_merge_with_text_p (abfd, sec))
1598 sym_pointer->e_type[0] |= N_TEXT;
1601 (*_bfd_error_handler)
1602 (_("%s: can not represent section `%s' in a.out object file format"),
1603 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1604 bfd_set_error (bfd_error_nonrepresentable_section);
1609 /* Turn the symbol from section relative to absolute again. */
1610 value += sec->vma + off;
1612 if ((cache_ptr->flags & BSF_WARNING) != 0)
1613 sym_pointer->e_type[0] = N_WARNING;
1615 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1616 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1617 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1618 sym_pointer->e_type[0] |= N_EXT;
1619 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1620 sym_pointer->e_type[0] &= ~N_EXT;
1622 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1624 int type = ((aout_symbol_type *) cache_ptr)->type;
1628 case N_ABS: type = N_SETA; break;
1629 case N_TEXT: type = N_SETT; break;
1630 case N_DATA: type = N_SETD; break;
1631 case N_BSS: type = N_SETB; break;
1633 sym_pointer->e_type[0] = type;
1636 if ((cache_ptr->flags & BSF_WEAK) != 0)
1640 switch (sym_pointer->e_type[0] & N_TYPE)
1643 case N_ABS: type = N_WEAKA; break;
1644 case N_TEXT: type = N_WEAKT; break;
1645 case N_DATA: type = N_WEAKD; break;
1646 case N_BSS: type = N_WEAKB; break;
1647 case N_UNDF: type = N_WEAKU; break;
1649 sym_pointer->e_type[0] = type;
1652 PUT_WORD (abfd, value, sym_pointer->e_value);
1657 /* Native-level interface to symbols. */
1660 NAME (aout, make_empty_symbol) (bfd *abfd)
1662 bfd_size_type amt = sizeof (aout_symbol_type);
1664 aout_symbol_type *new = bfd_zalloc (abfd, amt);
1667 new->symbol.the_bfd = abfd;
1669 return &new->symbol;
1672 /* Translate a set of internal symbols into external symbols. */
1675 NAME (aout, translate_symbol_table) (bfd *abfd,
1676 aout_symbol_type *in,
1677 struct external_nlist *ext,
1678 bfd_size_type count,
1680 bfd_size_type strsize,
1681 bfd_boolean dynamic)
1683 struct external_nlist *ext_end;
1685 ext_end = ext + count;
1686 for (; ext < ext_end; ext++, in++)
1690 x = GET_WORD (abfd, ext->e_strx);
1691 in->symbol.the_bfd = abfd;
1693 /* For the normal symbols, the zero index points at the number
1694 of bytes in the string table but is to be interpreted as the
1695 null string. For the dynamic symbols, the number of bytes in
1696 the string table is stored in the __DYNAMIC structure and the
1697 zero index points at an actual string. */
1698 if (x == 0 && ! dynamic)
1699 in->symbol.name = "";
1700 else if (x < strsize)
1701 in->symbol.name = str + x;
1705 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1706 in->desc = H_GET_16 (abfd, ext->e_desc);
1707 in->other = H_GET_8 (abfd, ext->e_other);
1708 in->type = H_GET_8 (abfd, ext->e_type);
1709 in->symbol.udata.p = NULL;
1711 if (! translate_from_native_sym_flags (abfd, in))
1715 in->symbol.flags |= BSF_DYNAMIC;
1721 /* We read the symbols into a buffer, which is discarded when this
1722 function exits. We read the strings into a buffer large enough to
1723 hold them all plus all the cached symbol entries. */
1726 NAME (aout, slurp_symbol_table) (bfd *abfd)
1728 struct external_nlist *old_external_syms;
1729 aout_symbol_type *cached;
1730 bfd_size_type cached_size;
1732 /* If there's no work to be done, don't do any. */
1733 if (obj_aout_symbols (abfd) != NULL)
1736 old_external_syms = obj_aout_external_syms (abfd);
1738 if (! aout_get_external_symbols (abfd))
1741 cached_size = obj_aout_external_sym_count (abfd);
1742 if (cached_size == 0)
1743 return TRUE; /* Nothing to do. */
1745 cached_size *= sizeof (aout_symbol_type);
1746 cached = bfd_zmalloc (cached_size);
1750 /* Convert from external symbol information to internal. */
1751 if (! (NAME (aout, translate_symbol_table)
1753 obj_aout_external_syms (abfd),
1754 obj_aout_external_sym_count (abfd),
1755 obj_aout_external_strings (abfd),
1756 obj_aout_external_string_size (abfd),
1763 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1765 obj_aout_symbols (abfd) = cached;
1767 /* It is very likely that anybody who calls this function will not
1768 want the external symbol information, so if it was allocated
1769 because of our call to aout_get_external_symbols, we free it up
1770 right away to save space. */
1771 if (old_external_syms == NULL
1772 && obj_aout_external_syms (abfd) != NULL)
1775 bfd_free_window (&obj_aout_sym_window (abfd));
1777 free (obj_aout_external_syms (abfd));
1779 obj_aout_external_syms (abfd) = NULL;
1785 /* We use a hash table when writing out symbols so that we only write
1786 out a particular string once. This helps particularly when the
1787 linker writes out stabs debugging entries, because each different
1788 contributing object file tends to have many duplicate stabs
1791 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1792 if BFD_TRADITIONAL_FORMAT is set. */
1794 /* Get the index of a string in a strtab, adding it if it is not
1797 static inline bfd_size_type
1798 add_to_stringtab (bfd *abfd,
1799 struct bfd_strtab_hash *tab,
1804 bfd_size_type index;
1806 /* An index of 0 always means the empty string. */
1807 if (str == 0 || *str == '\0')
1810 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1811 doesn't understand a hashed string table. */
1813 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1816 index = _bfd_stringtab_add (tab, str, hash, copy);
1818 if (index != (bfd_size_type) -1)
1819 /* Add BYTES_IN_WORD to the return value to account for the
1820 space taken up by the string table size. */
1821 index += BYTES_IN_WORD;
1826 /* Write out a strtab. ABFD is already at the right location in the
1830 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1832 bfd_byte buffer[BYTES_IN_WORD];
1833 bfd_size_type amt = BYTES_IN_WORD;
1835 /* The string table starts with the size. */
1836 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1837 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1840 return _bfd_stringtab_emit (abfd, tab);
1844 NAME (aout, write_syms) (bfd *abfd)
1846 unsigned int count ;
1847 asymbol **generic = bfd_get_outsymbols (abfd);
1848 struct bfd_strtab_hash *strtab;
1850 strtab = _bfd_stringtab_init ();
1854 for (count = 0; count < bfd_get_symcount (abfd); count++)
1856 asymbol *g = generic[count];
1858 struct external_nlist nsp;
1861 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1862 if (indx == (bfd_size_type) -1)
1864 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1866 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1868 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1869 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1870 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1874 H_PUT_16 (abfd, 0, nsp.e_desc);
1875 H_PUT_8 (abfd, 0, nsp.e_other);
1876 H_PUT_8 (abfd, 0, nsp.e_type);
1879 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1882 amt = EXTERNAL_NLIST_SIZE;
1883 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1886 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1887 here, at the end. */
1891 if (! emit_stringtab (abfd, strtab))
1894 _bfd_stringtab_free (strtab);
1899 _bfd_stringtab_free (strtab);
1904 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1906 unsigned int counter = 0;
1907 aout_symbol_type *symbase;
1909 if (!NAME (aout, slurp_symbol_table) (abfd))
1912 for (symbase = obj_aout_symbols (abfd);
1913 counter++ < bfd_get_symcount (abfd);
1915 *(location++) = (asymbol *) (symbase++);
1917 return bfd_get_symcount (abfd);
1920 /* Standard reloc stuff. */
1921 /* Output standard relocation information to a file in target byte order. */
1923 extern void NAME (aout, swap_std_reloc_out)
1924 (bfd *, arelent *, struct reloc_std_external *);
1927 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1929 struct reloc_std_external *natptr)
1932 asymbol *sym = *(g->sym_ptr_ptr);
1934 unsigned int r_length;
1936 int r_baserel, r_jmptable, r_relative;
1937 asection *output_section = sym->section->output_section;
1939 PUT_WORD (abfd, g->address, natptr->r_address);
1941 r_length = g->howto->size ; /* Size as a power of two. */
1942 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1943 /* XXX This relies on relocs coming from a.out files. */
1944 r_baserel = (g->howto->type & 8) != 0;
1945 r_jmptable = (g->howto->type & 16) != 0;
1946 r_relative = (g->howto->type & 32) != 0;
1948 /* Name was clobbered by aout_write_syms to be symbol index. */
1950 /* If this relocation is relative to a symbol then set the
1951 r_index to the symbols index, and the r_extern bit.
1953 Absolute symbols can come in in two ways, either as an offset
1954 from the abs section, or as a symbol which has an abs value.
1955 check for that here. */
1957 if (bfd_is_com_section (output_section)
1958 || bfd_is_abs_section (output_section)
1959 || bfd_is_und_section (output_section)
1960 /* PR gas/3041 a.out relocs against weak symbols
1961 must be treated as if they were against externs. */
1962 || (sym->flags & BSF_WEAK))
1964 if (bfd_abs_section_ptr->symbol == sym)
1966 /* Whoops, looked like an abs symbol, but is
1967 really an offset from the abs section. */
1973 /* Fill in symbol. */
1975 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1980 /* Just an ordinary section. */
1982 r_index = output_section->target_index;
1985 /* Now the fun stuff. */
1986 if (bfd_header_big_endian (abfd))
1988 natptr->r_index[0] = r_index >> 16;
1989 natptr->r_index[1] = r_index >> 8;
1990 natptr->r_index[2] = r_index;
1991 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
1992 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
1993 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
1994 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
1995 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
1996 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2000 natptr->r_index[2] = r_index >> 16;
2001 natptr->r_index[1] = r_index >> 8;
2002 natptr->r_index[0] = r_index;
2003 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2004 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2005 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2006 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2007 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2008 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2012 /* Extended stuff. */
2013 /* Output extended relocation information to a file in target byte order. */
2015 extern void NAME (aout, swap_ext_reloc_out)
2016 (bfd *, arelent *, struct reloc_ext_external *);
2019 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2021 struct reloc_ext_external *natptr)
2025 unsigned int r_type;
2027 asymbol *sym = *(g->sym_ptr_ptr);
2028 asection *output_section = sym->section->output_section;
2030 PUT_WORD (abfd, g->address, natptr->r_address);
2032 r_type = (unsigned int) g->howto->type;
2034 r_addend = g->addend;
2035 if ((sym->flags & BSF_SECTION_SYM) != 0)
2036 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2038 /* If this relocation is relative to a symbol then set the
2039 r_index to the symbols index, and the r_extern bit.
2041 Absolute symbols can come in in two ways, either as an offset
2042 from the abs section, or as a symbol which has an abs value.
2043 check for that here. */
2044 if (bfd_is_abs_section (bfd_get_section (sym)))
2049 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2051 if (bfd_is_und_section (bfd_get_section (sym))
2052 || (sym->flags & BSF_GLOBAL) != 0)
2056 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2060 /* Just an ordinary section. */
2062 r_index = output_section->target_index;
2065 /* Now the fun stuff. */
2066 if (bfd_header_big_endian (abfd))
2068 natptr->r_index[0] = r_index >> 16;
2069 natptr->r_index[1] = r_index >> 8;
2070 natptr->r_index[2] = r_index;
2071 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2072 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2076 natptr->r_index[2] = r_index >> 16;
2077 natptr->r_index[1] = r_index >> 8;
2078 natptr->r_index[0] = r_index;
2079 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2080 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2083 PUT_WORD (abfd, r_addend, natptr->r_addend);
2086 /* BFD deals internally with all things based from the section they're
2087 in. so, something in 10 bytes into a text section with a base of
2088 50 would have a symbol (.text+10) and know .text vma was 50.
2090 Aout keeps all it's symbols based from zero, so the symbol would
2091 contain 60. This macro subs the base of each section from the value
2092 to give the true offset from the section. */
2094 #define MOVE_ADDRESS(ad) \
2097 /* Undefined symbol. */ \
2098 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2099 cache_ptr->addend = ad; \
2103 /* Defined, section relative. Replace symbol with pointer to \
2104 symbol which points to section. */ \
2108 case N_TEXT | N_EXT: \
2109 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2110 cache_ptr->addend = ad - su->textsec->vma; \
2113 case N_DATA | N_EXT: \
2114 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2115 cache_ptr->addend = ad - su->datasec->vma; \
2118 case N_BSS | N_EXT: \
2119 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2120 cache_ptr->addend = ad - su->bsssec->vma; \
2124 case N_ABS | N_EXT: \
2125 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2126 cache_ptr->addend = ad; \
2132 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2133 struct reloc_ext_external *bytes,
2136 bfd_size_type symcount)
2138 unsigned int r_index;
2140 unsigned int r_type;
2141 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2143 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2145 /* Now the fun stuff. */
2146 if (bfd_header_big_endian (abfd))
2148 r_index = (((unsigned int) bytes->r_index[0] << 16)
2149 | ((unsigned int) bytes->r_index[1] << 8)
2150 | bytes->r_index[2]);
2151 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2152 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2153 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2157 r_index = (((unsigned int) bytes->r_index[2] << 16)
2158 | ((unsigned int) bytes->r_index[1] << 8)
2159 | bytes->r_index[0]);
2160 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2161 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2162 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2165 cache_ptr->howto = howto_table_ext + r_type;
2167 /* Base relative relocs are always against the symbol table,
2168 regardless of the setting of r_extern. r_extern just reflects
2169 whether the symbol the reloc is against is local or global. */
2170 if (r_type == (unsigned int) RELOC_BASE10
2171 || r_type == (unsigned int) RELOC_BASE13
2172 || r_type == (unsigned int) RELOC_BASE22)
2175 if (r_extern && r_index > symcount)
2177 /* We could arrange to return an error, but it might be useful
2178 to see the file even if it is bad. */
2183 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2187 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2188 struct reloc_std_external *bytes,
2191 bfd_size_type symcount)
2193 unsigned int r_index;
2195 unsigned int r_length;
2197 int r_baserel, r_jmptable, r_relative;
2198 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2199 unsigned int howto_idx;
2201 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2203 /* Now the fun stuff. */
2204 if (bfd_header_big_endian (abfd))
2206 r_index = (((unsigned int) bytes->r_index[0] << 16)
2207 | ((unsigned int) bytes->r_index[1] << 8)
2208 | bytes->r_index[2]);
2209 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2210 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2211 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2212 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2213 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2214 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2215 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2219 r_index = (((unsigned int) bytes->r_index[2] << 16)
2220 | ((unsigned int) bytes->r_index[1] << 8)
2221 | bytes->r_index[0]);
2222 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2223 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2224 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2225 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2226 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2227 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2228 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2231 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2232 + 16 * r_jmptable + 32 * r_relative);
2233 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2234 cache_ptr->howto = howto_table_std + howto_idx;
2235 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2237 /* Base relative relocs are always against the symbol table,
2238 regardless of the setting of r_extern. r_extern just reflects
2239 whether the symbol the reloc is against is local or global. */
2243 if (r_extern && r_index > symcount)
2245 /* We could arrange to return an error, but it might be useful
2246 to see the file even if it is bad. */
2254 /* Read and swap the relocs for a section. */
2257 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2259 bfd_size_type count;
2260 bfd_size_type reloc_size;
2262 arelent *reloc_cache;
2264 unsigned int counter = 0;
2268 if (asect->relocation)
2271 if (asect->flags & SEC_CONSTRUCTOR)
2274 if (asect == obj_datasec (abfd))
2275 reloc_size = exec_hdr (abfd)->a_drsize;
2276 else if (asect == obj_textsec (abfd))
2277 reloc_size = exec_hdr (abfd)->a_trsize;
2278 else if (asect == obj_bsssec (abfd))
2282 bfd_set_error (bfd_error_invalid_operation);
2286 if (reloc_size == 0)
2287 return TRUE; /* Nothing to be done. */
2289 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2292 each_size = obj_reloc_entry_size (abfd);
2294 count = reloc_size / each_size;
2296 return TRUE; /* Nothing to be done. */
2298 amt = count * sizeof (arelent);
2299 reloc_cache = bfd_zmalloc (amt);
2300 if (reloc_cache == NULL)
2303 relocs = bfd_malloc (reloc_size);
2310 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2317 cache_ptr = reloc_cache;
2318 if (each_size == RELOC_EXT_SIZE)
2320 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2322 for (; counter < count; counter++, rptr++, cache_ptr++)
2323 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2324 (bfd_size_type) bfd_get_symcount (abfd));
2328 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2330 for (; counter < count; counter++, rptr++, cache_ptr++)
2331 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2332 (bfd_size_type) bfd_get_symcount (abfd));
2337 asect->relocation = reloc_cache;
2338 asect->reloc_count = cache_ptr - reloc_cache;
2343 /* Write out a relocation section into an object file. */
2346 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2349 unsigned char *native, *natptr;
2352 unsigned int count = section->reloc_count;
2353 bfd_size_type natsize;
2355 if (count == 0 || section->orelocation == NULL)
2358 each_size = obj_reloc_entry_size (abfd);
2359 natsize = (bfd_size_type) each_size * count;
2360 native = bfd_zalloc (abfd, natsize);
2364 generic = section->orelocation;
2366 if (each_size == RELOC_EXT_SIZE)
2368 for (natptr = native;
2370 --count, natptr += each_size, ++generic)
2371 MY_swap_ext_reloc_out (abfd, *generic,
2372 (struct reloc_ext_external *) natptr);
2376 for (natptr = native;
2378 --count, natptr += each_size, ++generic)
2379 MY_swap_std_reloc_out (abfd, *generic,
2380 (struct reloc_std_external *) natptr);
2383 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2385 bfd_release (abfd, native);
2388 bfd_release (abfd, native);
2393 /* This is stupid. This function should be a boolean predicate. */
2396 NAME (aout, canonicalize_reloc) (bfd *abfd,
2401 arelent *tblptr = section->relocation;
2404 if (section == obj_bsssec (abfd))
2410 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2413 if (section->flags & SEC_CONSTRUCTOR)
2415 arelent_chain *chain = section->constructor_chain;
2416 for (count = 0; count < section->reloc_count; count ++)
2418 *relptr ++ = &chain->relent;
2419 chain = chain->next;
2424 tblptr = section->relocation;
2426 for (count = 0; count++ < section->reloc_count; )
2428 *relptr++ = tblptr++;
2433 return section->reloc_count;
2437 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2439 if (bfd_get_format (abfd) != bfd_object)
2441 bfd_set_error (bfd_error_invalid_operation);
2445 if (asect->flags & SEC_CONSTRUCTOR)
2446 return sizeof (arelent *) * (asect->reloc_count + 1);
2448 if (asect == obj_datasec (abfd))
2449 return sizeof (arelent *)
2450 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2453 if (asect == obj_textsec (abfd))
2454 return sizeof (arelent *)
2455 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2458 if (asect == obj_bsssec (abfd))
2459 return sizeof (arelent *);
2461 if (asect == obj_bsssec (abfd))
2464 bfd_set_error (bfd_error_invalid_operation);
2469 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2471 if (!NAME (aout, slurp_symbol_table) (abfd))
2474 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2478 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2479 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2485 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2489 bfd_symbol_info (symbol, ret);
2491 if (ret->type == '?')
2493 int type_code = aout_symbol (symbol)->type & 0xff;
2494 const char *stab_name = bfd_get_stab_name (type_code);
2495 static char buf[10];
2497 if (stab_name == NULL)
2499 sprintf (buf, "(%d)", type_code);
2503 ret->stab_type = type_code;
2504 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2505 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2506 ret->stab_name = stab_name;
2511 NAME (aout, print_symbol) (bfd *abfd,
2514 bfd_print_symbol_type how)
2516 FILE *file = (FILE *)afile;
2520 case bfd_print_symbol_name:
2522 fprintf (file,"%s", symbol->name);
2524 case bfd_print_symbol_more:
2525 fprintf (file,"%4x %2x %2x",
2526 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2527 (unsigned) (aout_symbol (symbol)->other & 0xff),
2528 (unsigned) (aout_symbol (symbol)->type));
2530 case bfd_print_symbol_all:
2532 const char *section_name = symbol->section->name;
2534 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2536 fprintf (file," %-5s %04x %02x %02x",
2538 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2539 (unsigned) (aout_symbol (symbol)->other & 0xff),
2540 (unsigned) (aout_symbol (symbol)->type & 0xff));
2542 fprintf (file," %s", symbol->name);
2548 /* If we don't have to allocate more than 1MB to hold the generic
2549 symbols, we use the generic minisymbol methord: it's faster, since
2550 it only translates the symbols once, not multiple times. */
2551 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2553 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2554 symbols. The minisymbol_to_symbol function translates these into
2555 BFD asymbol structures. */
2558 NAME (aout, read_minisymbols) (bfd *abfd,
2559 bfd_boolean dynamic,
2561 unsigned int *sizep)
2564 /* We could handle the dynamic symbols here as well, but it's
2565 easier to hand them off. */
2566 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2568 if (! aout_get_external_symbols (abfd))
2571 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2572 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2574 *minisymsp = (void *) obj_aout_external_syms (abfd);
2576 /* By passing the external symbols back from this routine, we are
2577 giving up control over the memory block. Clear
2578 obj_aout_external_syms, so that we do not try to free it
2580 obj_aout_external_syms (abfd) = NULL;
2582 *sizep = EXTERNAL_NLIST_SIZE;
2583 return obj_aout_external_sym_count (abfd);
2586 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2587 unmodified a.out symbol. The SYM argument is a structure returned
2588 by bfd_make_empty_symbol, which we fill in here. */
2591 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2592 bfd_boolean dynamic,
2593 const void * minisym,
2597 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2598 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2600 memset (sym, 0, sizeof (aout_symbol_type));
2602 /* We call translate_symbol_table to translate a single symbol. */
2603 if (! (NAME (aout, translate_symbol_table)
2605 (aout_symbol_type *) sym,
2606 (struct external_nlist *) minisym,
2608 obj_aout_external_strings (abfd),
2609 obj_aout_external_string_size (abfd),
2616 /* Provided a BFD, a section and an offset into the section, calculate
2617 and return the name of the source file and the line nearest to the
2621 NAME (aout, find_nearest_line) (bfd *abfd,
2625 const char **filename_ptr,
2626 const char **functionname_ptr,
2627 unsigned int *line_ptr)
2629 /* Run down the file looking for the filename, function and linenumber. */
2631 const char *directory_name = NULL;
2632 const char *main_file_name = NULL;
2633 const char *current_file_name = NULL;
2634 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2635 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2636 bfd_vma low_line_vma = 0;
2637 bfd_vma low_func_vma = 0;
2639 bfd_size_type filelen, funclen;
2642 *filename_ptr = abfd->filename;
2643 *functionname_ptr = 0;
2646 if (symbols != NULL)
2648 for (p = symbols; *p; p++)
2650 aout_symbol_type *q = (aout_symbol_type *) (*p);
2655 /* If this looks like a file name symbol, and it comes after
2656 the line number we have found so far, but before the
2657 offset, then we have probably not found the right line
2659 if (q->symbol.value <= offset
2660 && ((q->symbol.value > low_line_vma
2661 && (line_file_name != NULL
2663 || (q->symbol.value > low_func_vma
2666 const char *symname;
2668 symname = q->symbol.name;
2669 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2671 if (q->symbol.value > low_line_vma)
2674 line_file_name = NULL;
2676 if (q->symbol.value > low_func_vma)
2683 /* If this symbol is less than the offset, but greater than
2684 the line number we have found so far, then we have not
2685 found the right line number. */
2686 if (q->symbol.value <= offset)
2688 if (q->symbol.value > low_line_vma)
2691 line_file_name = NULL;
2693 if (q->symbol.value > low_func_vma)
2697 main_file_name = current_file_name = q->symbol.name;
2698 /* Look ahead to next symbol to check if that too is an N_SO. */
2702 q = (aout_symbol_type *) (*p);
2703 if (q->type != (int)N_SO)
2706 /* Found a second N_SO First is directory; second is filename. */
2707 directory_name = current_file_name;
2708 main_file_name = current_file_name = q->symbol.name;
2709 if (obj_textsec (abfd) != section)
2713 current_file_name = q->symbol.name;
2720 /* We'll keep this if it resolves nearer than the one we have
2722 if (q->symbol.value >= low_line_vma
2723 && q->symbol.value <= offset)
2725 *line_ptr = q->desc;
2726 low_line_vma = q->symbol.value;
2727 line_file_name = current_file_name;
2728 line_directory_name = directory_name;
2733 /* We'll keep this if it is nearer than the one we have already. */
2734 if (q->symbol.value >= low_func_vma &&
2735 q->symbol.value <= offset)
2737 low_func_vma = q->symbol.value;
2738 func = (asymbol *)q;
2740 else if (q->symbol.value > offset)
2751 main_file_name = line_file_name;
2752 directory_name = line_directory_name;
2755 if (main_file_name == NULL
2756 || IS_ABSOLUTE_PATH (main_file_name)
2757 || directory_name == NULL)
2760 filelen = strlen (directory_name) + strlen (main_file_name);
2765 funclen = strlen (bfd_asymbol_name (func));
2767 if (adata (abfd).line_buf != NULL)
2768 free (adata (abfd).line_buf);
2770 if (filelen + funclen == 0)
2771 adata (abfd).line_buf = buf = NULL;
2774 buf = bfd_malloc (filelen + funclen + 3);
2775 adata (abfd).line_buf = buf;
2780 if (main_file_name != NULL)
2782 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2783 *filename_ptr = main_file_name;
2786 sprintf (buf, "%s%s", directory_name, main_file_name);
2787 *filename_ptr = buf;
2794 const char *function = func->name;
2797 /* The caller expects a symbol name. We actually have a
2798 function name, without the leading underscore. Put the
2799 underscore back in, so that the caller gets a symbol name. */
2800 if (bfd_get_symbol_leading_char (abfd) == '\0')
2801 strcpy (buf, function);
2804 buf[0] = bfd_get_symbol_leading_char (abfd);
2805 strcpy (buf + 1, function);
2807 /* Have to remove : stuff. */
2808 colon = strchr (buf, ':');
2811 *functionname_ptr = buf;
2818 NAME (aout, sizeof_headers) (bfd *abfd,
2819 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2821 return adata (abfd).exec_bytes_size;
2824 /* Free all information we have cached for this BFD. We can always
2825 read it again later if we need it. */
2828 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2832 if (bfd_get_format (abfd) != bfd_object
2833 || abfd->tdata.aout_data == NULL)
2836 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2837 BFCI_FREE (obj_aout_symbols (abfd));
2839 obj_aout_external_syms (abfd) = 0;
2840 bfd_free_window (&obj_aout_sym_window (abfd));
2841 bfd_free_window (&obj_aout_string_window (abfd));
2842 obj_aout_external_strings (abfd) = 0;
2844 BFCI_FREE (obj_aout_external_syms (abfd));
2845 BFCI_FREE (obj_aout_external_strings (abfd));
2847 for (o = abfd->sections; o != NULL; o = o->next)
2848 BFCI_FREE (o->relocation);
2854 /* a.out link code. */
2856 /* Routine to create an entry in an a.out link hash table. */
2858 struct bfd_hash_entry *
2859 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2860 struct bfd_hash_table *table,
2863 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2865 /* Allocate the structure if it has not already been allocated by a
2868 ret = bfd_hash_allocate (table, sizeof (* ret));
2872 /* Call the allocation method of the superclass. */
2873 ret = ((struct aout_link_hash_entry *)
2874 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2878 /* Set local fields. */
2879 ret->written = FALSE;
2883 return (struct bfd_hash_entry *) ret;
2886 /* Initialize an a.out link hash table. */
2889 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2891 struct bfd_hash_entry *(*newfunc)
2892 (struct bfd_hash_entry *, struct bfd_hash_table *,
2894 unsigned int entsize)
2896 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2899 /* Create an a.out link hash table. */
2901 struct bfd_link_hash_table *
2902 NAME (aout, link_hash_table_create) (bfd *abfd)
2904 struct aout_link_hash_table *ret;
2905 bfd_size_type amt = sizeof (* ret);
2907 ret = bfd_malloc (amt);
2911 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2912 NAME (aout, link_hash_newfunc),
2913 sizeof (struct aout_link_hash_entry)))
2921 /* Add all symbols from an object file to the hash table. */
2924 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2926 bfd_boolean (*add_one_symbol)
2927 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2928 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2929 struct bfd_link_hash_entry **);
2930 struct external_nlist *syms;
2931 bfd_size_type sym_count;
2934 struct aout_link_hash_entry **sym_hash;
2935 struct external_nlist *p;
2936 struct external_nlist *pend;
2939 syms = obj_aout_external_syms (abfd);
2940 sym_count = obj_aout_external_sym_count (abfd);
2941 strings = obj_aout_external_strings (abfd);
2942 if (info->keep_memory)
2947 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2949 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2950 (abfd, info, &syms, &sym_count, &strings)))
2954 /* We keep a list of the linker hash table entries that correspond
2955 to particular symbols. We could just look them up in the hash
2956 table, but keeping the list is more efficient. Perhaps this
2957 should be conditional on info->keep_memory. */
2958 amt = sym_count * sizeof (struct aout_link_hash_entry *);
2959 sym_hash = bfd_alloc (abfd, amt);
2960 if (sym_hash == NULL && sym_count != 0)
2962 obj_aout_sym_hashes (abfd) = sym_hash;
2964 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
2965 if (add_one_symbol == NULL)
2966 add_one_symbol = _bfd_generic_link_add_one_symbol;
2969 pend = p + sym_count;
2970 for (; p < pend; p++, sym_hash++)
2981 type = H_GET_8 (abfd, p->e_type);
2983 /* Ignore debugging symbols. */
2984 if ((type & N_STAB) != 0)
2987 name = strings + GET_WORD (abfd, p->e_strx);
2988 value = GET_WORD (abfd, p->e_value);
3005 /* Ignore symbols that are not externally visible. */
3008 /* Ignore local indirect symbol. */
3013 case N_UNDF | N_EXT:
3016 section = bfd_und_section_ptr;
3020 section = bfd_com_section_ptr;
3023 section = bfd_abs_section_ptr;
3025 case N_TEXT | N_EXT:
3026 section = obj_textsec (abfd);
3027 value -= bfd_get_section_vma (abfd, section);
3029 case N_DATA | N_EXT:
3030 case N_SETV | N_EXT:
3031 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3032 translate_from_native_sym_flags. */
3033 section = obj_datasec (abfd);
3034 value -= bfd_get_section_vma (abfd, section);
3037 section = obj_bsssec (abfd);
3038 value -= bfd_get_section_vma (abfd, section);
3040 case N_INDR | N_EXT:
3041 /* An indirect symbol. The next symbol is the symbol
3042 which this one really is. */
3043 BFD_ASSERT (p + 1 < pend);
3045 string = strings + GET_WORD (abfd, p->e_strx);
3046 section = bfd_ind_section_ptr;
3047 flags |= BSF_INDIRECT;
3049 case N_COMM | N_EXT:
3050 section = bfd_com_section_ptr;
3052 case N_SETA: case N_SETA | N_EXT:
3053 section = bfd_abs_section_ptr;
3054 flags |= BSF_CONSTRUCTOR;
3056 case N_SETT: case N_SETT | N_EXT:
3057 section = obj_textsec (abfd);
3058 flags |= BSF_CONSTRUCTOR;
3059 value -= bfd_get_section_vma (abfd, section);
3061 case N_SETD: case N_SETD | N_EXT:
3062 section = obj_datasec (abfd);
3063 flags |= BSF_CONSTRUCTOR;
3064 value -= bfd_get_section_vma (abfd, section);
3066 case N_SETB: case N_SETB | N_EXT:
3067 section = obj_bsssec (abfd);
3068 flags |= BSF_CONSTRUCTOR;
3069 value -= bfd_get_section_vma (abfd, section);
3072 /* A warning symbol. The next symbol is the one to warn
3073 about. If there is no next symbol, just look away. */
3078 name = strings + GET_WORD (abfd, p->e_strx);
3079 section = bfd_und_section_ptr;
3080 flags |= BSF_WARNING;
3083 section = bfd_und_section_ptr;
3087 section = bfd_abs_section_ptr;
3091 section = obj_textsec (abfd);
3092 value -= bfd_get_section_vma (abfd, section);
3096 section = obj_datasec (abfd);
3097 value -= bfd_get_section_vma (abfd, section);
3101 section = obj_bsssec (abfd);
3102 value -= bfd_get_section_vma (abfd, section);
3107 if (! ((*add_one_symbol)
3108 (info, abfd, name, flags, section, value, string, copy, FALSE,
3109 (struct bfd_link_hash_entry **) sym_hash)))
3112 /* Restrict the maximum alignment of a common symbol based on
3113 the architecture, since a.out has no way to represent
3114 alignment requirements of a section in a .o file. FIXME:
3115 This isn't quite right: it should use the architecture of the
3116 output file, not the input files. */
3117 if ((*sym_hash)->root.type == bfd_link_hash_common
3118 && ((*sym_hash)->root.u.c.p->alignment_power >
3119 bfd_get_arch_info (abfd)->section_align_power))
3120 (*sym_hash)->root.u.c.p->alignment_power =
3121 bfd_get_arch_info (abfd)->section_align_power;
3123 /* If this is a set symbol, and we are not building sets, then
3124 it is possible for the hash entry to not have been set. In
3125 such a case, treat the symbol as not globally defined. */
3126 if ((*sym_hash)->root.type == bfd_link_hash_new)
3128 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3132 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3139 /* Free up the internal symbols read from an a.out file. */
3142 aout_link_free_symbols (bfd *abfd)
3144 if (obj_aout_external_syms (abfd) != NULL)
3147 bfd_free_window (&obj_aout_sym_window (abfd));
3149 free ((void *) obj_aout_external_syms (abfd));
3151 obj_aout_external_syms (abfd) = NULL;
3153 if (obj_aout_external_strings (abfd) != NULL)
3156 bfd_free_window (&obj_aout_string_window (abfd));
3158 free ((void *) obj_aout_external_strings (abfd));
3160 obj_aout_external_strings (abfd) = NULL;
3165 /* Add symbols from an a.out object file. */
3168 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3170 if (! aout_get_external_symbols (abfd))
3172 if (! aout_link_add_symbols (abfd, info))
3174 if (! info->keep_memory)
3176 if (! aout_link_free_symbols (abfd))
3182 /* Look through the internal symbols to see if this object file should
3183 be included in the link. We should include this object file if it
3184 defines any symbols which are currently undefined. If this object
3185 file defines a common symbol, then we may adjust the size of the
3186 known symbol but we do not include the object file in the link
3187 (unless there is some other reason to include it). */
3190 aout_link_check_ar_symbols (bfd *abfd,
3191 struct bfd_link_info *info,
3192 bfd_boolean *pneeded)
3194 struct external_nlist *p;
3195 struct external_nlist *pend;
3200 /* Look through all the symbols. */
3201 p = obj_aout_external_syms (abfd);
3202 pend = p + obj_aout_external_sym_count (abfd);
3203 strings = obj_aout_external_strings (abfd);
3204 for (; p < pend; p++)
3206 int type = H_GET_8 (abfd, p->e_type);
3208 struct bfd_link_hash_entry *h;
3210 /* Ignore symbols that are not externally visible. This is an
3211 optimization only, as we check the type more thoroughly
3213 if (((type & N_EXT) == 0
3214 || (type & N_STAB) != 0
3221 if (type == N_WARNING
3227 name = strings + GET_WORD (abfd, p->e_strx);
3228 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3230 /* We are only interested in symbols that are currently
3231 undefined or common. */
3233 || (h->type != bfd_link_hash_undefined
3234 && h->type != bfd_link_hash_common))
3236 if (type == (N_INDR | N_EXT))
3241 if (type == (N_TEXT | N_EXT)
3242 || type == (N_DATA | N_EXT)
3243 || type == (N_BSS | N_EXT)
3244 || type == (N_ABS | N_EXT)
3245 || type == (N_INDR | N_EXT))
3247 /* This object file defines this symbol. We must link it
3248 in. This is true regardless of whether the current
3249 definition of the symbol is undefined or common.
3251 If the current definition is common, we have a case in
3252 which we have already seen an object file including:
3254 and this object file from the archive includes:
3256 In such a case, whether to include this object is target
3257 dependant for backward compatibility.
3259 FIXME: The SunOS 4.1.3 linker will pull in the archive
3260 element if the symbol is defined in the .data section,
3261 but not if it is defined in the .text section. That
3262 seems a bit crazy to me, and it has not been implemented
3263 yet. However, it might be correct. */
3264 if (h->type == bfd_link_hash_common)
3268 switch (info->common_skip_ar_aymbols)
3270 case bfd_link_common_skip_text:
3271 skip = (type == (N_TEXT | N_EXT));
3273 case bfd_link_common_skip_data:
3274 skip = (type == (N_DATA | N_EXT));
3277 case bfd_link_common_skip_all:
3286 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3292 if (type == (N_UNDF | N_EXT))
3296 value = GET_WORD (abfd, p->e_value);
3299 /* This symbol is common in the object from the archive
3301 if (h->type == bfd_link_hash_undefined)
3306 symbfd = h->u.undef.abfd;
3309 /* This symbol was created as undefined from
3310 outside BFD. We assume that we should link
3311 in the object file. This is done for the -u
3312 option in the linker. */
3313 if (! (*info->callbacks->add_archive_element) (info,
3320 /* Turn the current link symbol into a common
3321 symbol. It is already on the undefs list. */
3322 h->type = bfd_link_hash_common;
3323 h->u.c.p = bfd_hash_allocate (&info->hash->table,
3324 sizeof (struct bfd_link_hash_common_entry));
3325 if (h->u.c.p == NULL)
3328 h->u.c.size = value;
3330 /* FIXME: This isn't quite right. The maximum
3331 alignment of a common symbol should be set by the
3332 architecture of the output file, not of the input
3334 power = bfd_log2 (value);
3335 if (power > bfd_get_arch_info (abfd)->section_align_power)
3336 power = bfd_get_arch_info (abfd)->section_align_power;
3337 h->u.c.p->alignment_power = power;
3339 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3344 /* Adjust the size of the common symbol if
3346 if (value > h->u.c.size)
3347 h->u.c.size = value;
3357 /* This symbol is weak but defined. We must pull it in if
3358 the current link symbol is undefined, but we don't want
3359 it if the current link symbol is common. */
3360 if (h->type == bfd_link_hash_undefined)
3362 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3370 /* We do not need this object file. */
3373 /* Check a single archive element to see if we need to include it in
3374 the link. *PNEEDED is set according to whether this element is
3375 needed in the link or not. This is called from
3376 _bfd_generic_link_add_archive_symbols. */
3379 aout_link_check_archive_element (bfd *abfd,
3380 struct bfd_link_info *info,
3381 bfd_boolean *pneeded)
3383 if (! aout_get_external_symbols (abfd))
3386 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3391 if (! aout_link_add_symbols (abfd, info))
3395 if (! info->keep_memory || ! *pneeded)
3397 if (! aout_link_free_symbols (abfd))
3404 /* Given an a.out BFD, add symbols to the global hash table as
3408 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3410 switch (bfd_get_format (abfd))
3413 return aout_link_add_object_symbols (abfd, info);
3415 return _bfd_generic_link_add_archive_symbols
3416 (abfd, info, aout_link_check_archive_element);
3418 bfd_set_error (bfd_error_wrong_format);
3423 /* A hash table used for header files with N_BINCL entries. */
3425 struct aout_link_includes_table
3427 struct bfd_hash_table root;
3430 /* A linked list of totals that we have found for a particular header
3433 struct aout_link_includes_totals
3435 struct aout_link_includes_totals *next;
3439 /* An entry in the header file hash table. */
3441 struct aout_link_includes_entry
3443 struct bfd_hash_entry root;
3444 /* List of totals we have found for this file. */
3445 struct aout_link_includes_totals *totals;
3448 /* Look up an entry in an the header file hash table. */
3450 #define aout_link_includes_lookup(table, string, create, copy) \
3451 ((struct aout_link_includes_entry *) \
3452 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3454 /* During the final link step we need to pass around a bunch of
3455 information, so we do it in an instance of this structure. */
3457 struct aout_final_link_info
3459 /* General link information. */
3460 struct bfd_link_info *info;
3463 /* Reloc file positions. */
3464 file_ptr treloff, dreloff;
3465 /* File position of symbols. */
3468 struct bfd_strtab_hash *strtab;
3469 /* Header file hash table. */
3470 struct aout_link_includes_table includes;
3471 /* A buffer large enough to hold the contents of any section. */
3473 /* A buffer large enough to hold the relocs of any section. */
3475 /* A buffer large enough to hold the symbol map of any input BFD. */
3477 /* A buffer large enough to hold output symbols of any input BFD. */
3478 struct external_nlist *output_syms;
3481 /* The function to create a new entry in the header file hash table. */
3483 static struct bfd_hash_entry *
3484 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3485 struct bfd_hash_table *table,
3488 struct aout_link_includes_entry *ret =
3489 (struct aout_link_includes_entry *) entry;
3491 /* Allocate the structure if it has not already been allocated by a
3494 ret = bfd_hash_allocate (table, sizeof (* ret));
3498 /* Call the allocation method of the superclass. */
3499 ret = ((struct aout_link_includes_entry *)
3500 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3503 /* Set local fields. */
3507 return (struct bfd_hash_entry *) ret;
3510 /* Write out a symbol that was not associated with an a.out input
3514 aout_link_write_other_symbol (struct aout_link_hash_entry *h, void * data)
3516 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
3520 struct external_nlist outsym;
3524 if (h->root.type == bfd_link_hash_warning)
3526 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3527 if (h->root.type == bfd_link_hash_new)
3531 output_bfd = finfo->output_bfd;
3533 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3535 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3536 (output_bfd, finfo->info, h)))
3538 /* FIXME: No way to handle errors. */
3548 /* An indx of -2 means the symbol must be written. */
3550 && (finfo->info->strip == strip_all
3551 || (finfo->info->strip == strip_some
3552 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
3553 FALSE, FALSE) == NULL)))
3556 switch (h->root.type)
3559 case bfd_link_hash_warning:
3561 /* Avoid variable not initialized warnings. */
3563 case bfd_link_hash_new:
3564 /* This can happen for set symbols when sets are not being
3567 case bfd_link_hash_undefined:
3568 type = N_UNDF | N_EXT;
3571 case bfd_link_hash_defined:
3572 case bfd_link_hash_defweak:
3576 sec = h->root.u.def.section->output_section;
3577 BFD_ASSERT (bfd_is_abs_section (sec)
3578 || sec->owner == output_bfd);
3579 if (sec == obj_textsec (output_bfd))
3580 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3581 else if (sec == obj_datasec (output_bfd))
3582 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3583 else if (sec == obj_bsssec (output_bfd))
3584 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3586 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3588 val = (h->root.u.def.value
3590 + h->root.u.def.section->output_offset);
3593 case bfd_link_hash_common:
3594 type = N_UNDF | N_EXT;
3595 val = h->root.u.c.size;
3597 case bfd_link_hash_undefweak:
3600 case bfd_link_hash_indirect:
3601 /* We ignore these symbols, since the indirected symbol is
3602 already in the hash table. */
3606 H_PUT_8 (output_bfd, type, outsym.e_type);
3607 H_PUT_8 (output_bfd, 0, outsym.e_other);
3608 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3609 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
3611 if (indx == - (bfd_size_type) 1)
3612 /* FIXME: No way to handle errors. */
3615 PUT_WORD (output_bfd, indx, outsym.e_strx);
3616 PUT_WORD (output_bfd, val, outsym.e_value);
3618 amt = EXTERNAL_NLIST_SIZE;
3619 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
3620 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3621 /* FIXME: No way to handle errors. */
3624 finfo->symoff += EXTERNAL_NLIST_SIZE;
3625 h->indx = obj_aout_external_sym_count (output_bfd);
3626 ++obj_aout_external_sym_count (output_bfd);
3631 /* Handle a link order which is supposed to generate a reloc. */
3634 aout_link_reloc_link_order (struct aout_final_link_info *finfo,
3636 struct bfd_link_order *p)
3638 struct bfd_link_order_reloc *pr;
3641 reloc_howto_type *howto;
3642 file_ptr *reloff_ptr = NULL;
3643 struct reloc_std_external srel;
3644 struct reloc_ext_external erel;
3650 if (p->type == bfd_section_reloc_link_order)
3653 if (bfd_is_abs_section (pr->u.section))
3654 r_index = N_ABS | N_EXT;
3657 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
3658 r_index = pr->u.section->target_index;
3663 struct aout_link_hash_entry *h;
3665 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3667 h = ((struct aout_link_hash_entry *)
3668 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
3669 pr->u.name, FALSE, FALSE, TRUE));
3675 /* We decided to strip this symbol, but it turns out that we
3676 can't. Note that we lose the other and desc information
3677 here. I don't think that will ever matter for a global
3681 if (! aout_link_write_other_symbol (h, (void *) finfo))
3687 if (! ((*finfo->info->callbacks->unattached_reloc)
3688 (finfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0)))
3694 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
3697 bfd_set_error (bfd_error_bad_value);
3701 if (o == obj_textsec (finfo->output_bfd))
3702 reloff_ptr = &finfo->treloff;
3703 else if (o == obj_datasec (finfo->output_bfd))
3704 reloff_ptr = &finfo->dreloff;
3708 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
3711 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto,
3721 r_pcrel = (int) howto->pc_relative;
3722 r_baserel = (howto->type & 8) != 0;
3723 r_jmptable = (howto->type & 16) != 0;
3724 r_relative = (howto->type & 32) != 0;
3725 r_length = howto->size;
3727 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
3728 if (bfd_header_big_endian (finfo->output_bfd))
3730 srel.r_index[0] = r_index >> 16;
3731 srel.r_index[1] = r_index >> 8;
3732 srel.r_index[2] = r_index;
3734 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3735 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3736 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3737 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3738 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3739 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3743 srel.r_index[2] = r_index >> 16;
3744 srel.r_index[1] = r_index >> 8;
3745 srel.r_index[0] = r_index;
3747 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3748 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3749 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3750 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3751 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3752 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3756 rel_ptr = (void *) &srel;
3758 /* We have to write the addend into the object file, since
3759 standard a.out relocs are in place. It would be more
3760 reliable if we had the current contents of the file here,
3761 rather than assuming zeroes, but we can't read the file since
3762 it was opened using bfd_openw. */
3763 if (pr->addend != 0)
3766 bfd_reloc_status_type r;
3770 size = bfd_get_reloc_size (howto);
3771 buf = bfd_zmalloc (size);
3774 r = MY_relocate_contents (howto, finfo->output_bfd,
3775 (bfd_vma) pr->addend, buf);
3781 case bfd_reloc_outofrange:
3783 case bfd_reloc_overflow:
3784 if (! ((*finfo->info->callbacks->reloc_overflow)
3786 (p->type == bfd_section_reloc_link_order
3787 ? bfd_section_name (finfo->output_bfd,
3790 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0)))
3797 ok = bfd_set_section_contents (finfo->output_bfd, o, (void *) buf,
3798 (file_ptr) p->offset, size);
3806 #ifdef MY_put_ext_reloc
3807 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
3808 howto, &erel, pr->addend);
3810 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
3812 if (bfd_header_big_endian (finfo->output_bfd))
3814 erel.r_index[0] = r_index >> 16;
3815 erel.r_index[1] = r_index >> 8;
3816 erel.r_index[2] = r_index;
3818 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3819 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3823 erel.r_index[2] = r_index >> 16;
3824 erel.r_index[1] = r_index >> 8;
3825 erel.r_index[0] = r_index;
3827 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3828 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3831 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3832 #endif /* MY_put_ext_reloc */
3834 rel_ptr = (void *) &erel;
3837 amt = obj_reloc_entry_size (finfo->output_bfd);
3838 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3839 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt)
3842 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
3844 /* Assert that the relocs have not run into the symbols, and that n
3845 the text relocs have not run into the data relocs. */
3846 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
3847 && (reloff_ptr != &finfo->treloff
3849 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
3854 /* Get the section corresponding to a reloc index. */
3856 static INLINE asection *
3857 aout_reloc_index_to_section (bfd *abfd, int indx)
3859 switch (indx & N_TYPE)
3861 case N_TEXT: return obj_textsec (abfd);
3862 case N_DATA: return obj_datasec (abfd);
3863 case N_BSS: return obj_bsssec (abfd);
3865 case N_UNDF: return bfd_abs_section_ptr;
3871 /* Relocate an a.out section using standard a.out relocs. */
3874 aout_link_input_section_std (struct aout_final_link_info *finfo,
3876 asection *input_section,
3877 struct reloc_std_external *relocs,
3878 bfd_size_type rel_size,
3881 bfd_boolean (*check_dynamic_reloc)
3882 (struct bfd_link_info *, bfd *, asection *,
3883 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3886 bfd_boolean relocatable;
3887 struct external_nlist *syms;
3889 struct aout_link_hash_entry **sym_hashes;
3891 bfd_size_type reloc_count;
3892 struct reloc_std_external *rel;
3893 struct reloc_std_external *rel_end;
3895 output_bfd = finfo->output_bfd;
3896 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3898 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3899 BFD_ASSERT (input_bfd->xvec->header_byteorder
3900 == output_bfd->xvec->header_byteorder);
3902 relocatable = finfo->info->relocatable;
3903 syms = obj_aout_external_syms (input_bfd);
3904 strings = obj_aout_external_strings (input_bfd);
3905 sym_hashes = obj_aout_sym_hashes (input_bfd);
3906 symbol_map = finfo->symbol_map;
3908 reloc_count = rel_size / RELOC_STD_SIZE;
3910 rel_end = rel + reloc_count;
3911 for (; rel < rel_end; rel++)
3918 reloc_howto_type *howto;
3919 struct aout_link_hash_entry *h = NULL;
3921 bfd_reloc_status_type r;
3923 r_addr = GET_SWORD (input_bfd, rel->r_address);
3925 #ifdef MY_reloc_howto
3926 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
3932 unsigned int howto_idx;
3934 if (bfd_header_big_endian (input_bfd))
3936 r_index = (((unsigned int) rel->r_index[0] << 16)
3937 | ((unsigned int) rel->r_index[1] << 8)
3939 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
3940 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
3941 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
3942 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
3943 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
3944 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
3945 >> RELOC_STD_BITS_LENGTH_SH_BIG);
3949 r_index = (((unsigned int) rel->r_index[2] << 16)
3950 | ((unsigned int) rel->r_index[1] << 8)
3952 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
3953 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
3954 r_baserel = (0 != (rel->r_type[0]
3955 & RELOC_STD_BITS_BASEREL_LITTLE));
3956 r_jmptable= (0 != (rel->r_type[0]
3957 & RELOC_STD_BITS_JMPTABLE_LITTLE));
3958 r_relative= (0 != (rel->r_type[0]
3959 & RELOC_STD_BITS_RELATIVE_LITTLE));
3960 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
3961 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
3964 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
3965 + 16 * r_jmptable + 32 * r_relative);
3966 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
3967 howto = howto_table_std + howto_idx;
3973 /* We are generating a relocatable output file, and must
3974 modify the reloc accordingly. */
3977 /* If we know the symbol this relocation is against,
3978 convert it into a relocation against a section. This
3979 is what the native linker does. */
3980 h = sym_hashes[r_index];
3982 && (h->root.type == bfd_link_hash_defined
3983 || h->root.type == bfd_link_hash_defweak))
3985 asection *output_section;
3987 /* Change the r_extern value. */
3988 if (bfd_header_big_endian (output_bfd))
3989 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
3991 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
3993 /* Compute a new r_index. */
3994 output_section = h->root.u.def.section->output_section;
3995 if (output_section == obj_textsec (output_bfd))
3997 else if (output_section == obj_datasec (output_bfd))
3999 else if (output_section == obj_bsssec (output_bfd))
4004 /* Add the symbol value and the section VMA to the
4005 addend stored in the contents. */
4006 relocation = (h->root.u.def.value
4007 + output_section->vma
4008 + h->root.u.def.section->output_offset);
4012 /* We must change r_index according to the symbol
4014 r_index = symbol_map[r_index];
4020 /* We decided to strip this symbol, but it
4021 turns out that we can't. Note that we
4022 lose the other and desc information here.
4023 I don't think that will ever matter for a
4029 if (! aout_link_write_other_symbol (h,
4039 name = strings + GET_WORD (input_bfd,
4040 syms[r_index].e_strx);
4041 if (! ((*finfo->info->callbacks->unattached_reloc)
4042 (finfo->info, name, input_bfd, input_section,
4052 /* Write out the new r_index value. */
4053 if (bfd_header_big_endian (output_bfd))
4055 rel->r_index[0] = r_index >> 16;
4056 rel->r_index[1] = r_index >> 8;
4057 rel->r_index[2] = r_index;
4061 rel->r_index[2] = r_index >> 16;
4062 rel->r_index[1] = r_index >> 8;
4063 rel->r_index[0] = r_index;
4070 /* This is a relocation against a section. We must
4071 adjust by the amount that the section moved. */
4072 section = aout_reloc_index_to_section (input_bfd, r_index);
4073 relocation = (section->output_section->vma
4074 + section->output_offset
4078 /* Change the address of the relocation. */
4079 PUT_WORD (output_bfd,
4080 r_addr + input_section->output_offset,
4083 /* Adjust a PC relative relocation by removing the reference
4084 to the original address in the section and including the
4085 reference to the new address. */
4087 relocation -= (input_section->output_section->vma
4088 + input_section->output_offset
4089 - input_section->vma);
4091 #ifdef MY_relocatable_reloc
4092 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4095 if (relocation == 0)
4098 r = MY_relocate_contents (howto,
4099 input_bfd, relocation,
4106 /* We are generating an executable, and must do a full
4112 h = sym_hashes[r_index];
4115 && (h->root.type == bfd_link_hash_defined
4116 || h->root.type == bfd_link_hash_defweak))
4118 relocation = (h->root.u.def.value
4119 + h->root.u.def.section->output_section->vma
4120 + h->root.u.def.section->output_offset);
4123 && h->root.type == bfd_link_hash_undefweak)
4135 section = aout_reloc_index_to_section (input_bfd, r_index);
4136 relocation = (section->output_section->vma
4137 + section->output_offset
4140 relocation += input_section->vma;
4143 if (check_dynamic_reloc != NULL)
4147 if (! ((*check_dynamic_reloc)
4148 (finfo->info, input_bfd, input_section, h,
4149 (void *) rel, contents, &skip, &relocation)))
4155 /* Now warn if a global symbol is undefined. We could not
4156 do this earlier, because check_dynamic_reloc might want
4157 to skip this reloc. */
4158 if (hundef && ! finfo->info->shared && ! r_baserel)
4163 name = h->root.root.string;
4165 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4166 if (! ((*finfo->info->callbacks->undefined_symbol)
4167 (finfo->info, name, input_bfd, input_section,
4172 r = MY_final_link_relocate (howto,
4173 input_bfd, input_section,
4174 contents, r_addr, relocation,
4178 if (r != bfd_reloc_ok)
4183 case bfd_reloc_outofrange:
4185 case bfd_reloc_overflow:
4192 name = strings + GET_WORD (input_bfd,
4193 syms[r_index].e_strx);
4198 s = aout_reloc_index_to_section (input_bfd, r_index);
4199 name = bfd_section_name (input_bfd, s);
4201 if (! ((*finfo->info->callbacks->reloc_overflow)
4202 (finfo->info, (h ? &h->root : NULL), name,
4203 howto->name, (bfd_vma) 0, input_bfd,
4204 input_section, r_addr)))
4215 /* Relocate an a.out section using extended a.out relocs. */
4218 aout_link_input_section_ext (struct aout_final_link_info *finfo,
4220 asection *input_section,
4221 struct reloc_ext_external *relocs,
4222 bfd_size_type rel_size,
4225 bfd_boolean (*check_dynamic_reloc)
4226 (struct bfd_link_info *, bfd *, asection *,
4227 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4230 bfd_boolean relocatable;
4231 struct external_nlist *syms;
4233 struct aout_link_hash_entry **sym_hashes;
4235 bfd_size_type reloc_count;
4236 struct reloc_ext_external *rel;
4237 struct reloc_ext_external *rel_end;
4239 output_bfd = finfo->output_bfd;
4240 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4242 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4243 BFD_ASSERT (input_bfd->xvec->header_byteorder
4244 == output_bfd->xvec->header_byteorder);
4246 relocatable = finfo->info->relocatable;
4247 syms = obj_aout_external_syms (input_bfd);
4248 strings = obj_aout_external_strings (input_bfd);
4249 sym_hashes = obj_aout_sym_hashes (input_bfd);
4250 symbol_map = finfo->symbol_map;
4252 reloc_count = rel_size / RELOC_EXT_SIZE;
4254 rel_end = rel + reloc_count;
4255 for (; rel < rel_end; rel++)
4260 unsigned int r_type;
4262 struct aout_link_hash_entry *h = NULL;
4263 asection *r_section = NULL;
4266 r_addr = GET_SWORD (input_bfd, rel->r_address);
4268 if (bfd_header_big_endian (input_bfd))
4270 r_index = (((unsigned int) rel->r_index[0] << 16)
4271 | ((unsigned int) rel->r_index[1] << 8)
4273 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4274 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4275 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4279 r_index = (((unsigned int) rel->r_index[2] << 16)
4280 | ((unsigned int) rel->r_index[1] << 8)
4282 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4283 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4284 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4287 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4289 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
4293 /* We are generating a relocatable output file, and must
4294 modify the reloc accordingly. */
4296 || r_type == (unsigned int) RELOC_BASE10
4297 || r_type == (unsigned int) RELOC_BASE13
4298 || r_type == (unsigned int) RELOC_BASE22)
4300 /* If we know the symbol this relocation is against,
4301 convert it into a relocation against a section. This
4302 is what the native linker does. */
4303 if (r_type == (unsigned int) RELOC_BASE10
4304 || r_type == (unsigned int) RELOC_BASE13
4305 || r_type == (unsigned int) RELOC_BASE22)
4308 h = sym_hashes[r_index];
4310 && (h->root.type == bfd_link_hash_defined
4311 || h->root.type == bfd_link_hash_defweak))
4313 asection *output_section;
4315 /* Change the r_extern value. */
4316 if (bfd_header_big_endian (output_bfd))
4317 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4319 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4321 /* Compute a new r_index. */
4322 output_section = h->root.u.def.section->output_section;
4323 if (output_section == obj_textsec (output_bfd))
4325 else if (output_section == obj_datasec (output_bfd))
4327 else if (output_section == obj_bsssec (output_bfd))
4332 /* Add the symbol value and the section VMA to the
4334 relocation = (h->root.u.def.value
4335 + output_section->vma
4336 + h->root.u.def.section->output_offset);
4338 /* Now RELOCATION is the VMA of the final
4339 destination. If this is a PC relative reloc,
4340 then ADDEND is the negative of the source VMA.
4341 We want to set ADDEND to the difference between
4342 the destination VMA and the source VMA, which
4343 means we must adjust RELOCATION by the change in
4344 the source VMA. This is done below. */
4348 /* We must change r_index according to the symbol
4350 r_index = symbol_map[r_index];
4356 /* We decided to strip this symbol, but it
4357 turns out that we can't. Note that we
4358 lose the other and desc information here.
4359 I don't think that will ever matter for a
4365 if (! aout_link_write_other_symbol (h,
4375 name = strings + GET_WORD (input_bfd,
4376 syms[r_index].e_strx);
4377 if (! ((*finfo->info->callbacks->unattached_reloc)
4378 (finfo->info, name, input_bfd, input_section,
4387 /* If this is a PC relative reloc, then the addend
4388 is the negative of the source VMA. We must
4389 adjust it by the change in the source VMA. This
4393 /* Write out the new r_index value. */
4394 if (bfd_header_big_endian (output_bfd))
4396 rel->r_index[0] = r_index >> 16;
4397 rel->r_index[1] = r_index >> 8;
4398 rel->r_index[2] = r_index;
4402 rel->r_index[2] = r_index >> 16;
4403 rel->r_index[1] = r_index >> 8;
4404 rel->r_index[0] = r_index;
4409 /* This is a relocation against a section. We must
4410 adjust by the amount that the section moved. */
4411 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4412 relocation = (r_section->output_section->vma
4413 + r_section->output_offset
4416 /* If this is a PC relative reloc, then the addend is
4417 the difference in VMA between the destination and the
4418 source. We have just adjusted for the change in VMA
4419 of the destination, so we must also adjust by the
4420 change in VMA of the source. This is done below. */
4423 /* As described above, we must always adjust a PC relative
4424 reloc by the change in VMA of the source. However, if
4425 pcrel_offset is set, then the addend does not include the
4426 location within the section, in which case we don't need
4427 to adjust anything. */
4428 if (howto_table_ext[r_type].pc_relative
4429 && ! howto_table_ext[r_type].pcrel_offset)
4430 relocation -= (input_section->output_section->vma
4431 + input_section->output_offset
4432 - input_section->vma);
4434 /* Change the addend if necessary. */
4435 if (relocation != 0)
4436 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4438 /* Change the address of the relocation. */
4439 PUT_WORD (output_bfd,
4440 r_addr + input_section->output_offset,
4446 bfd_reloc_status_type r;
4448 /* We are generating an executable, and must do a full
4454 h = sym_hashes[r_index];
4457 && (h->root.type == bfd_link_hash_defined
4458 || h->root.type == bfd_link_hash_defweak))
4460 relocation = (h->root.u.def.value
4461 + h->root.u.def.section->output_section->vma
4462 + h->root.u.def.section->output_offset);
4465 && h->root.type == bfd_link_hash_undefweak)
4473 else if (r_type == (unsigned int) RELOC_BASE10
4474 || r_type == (unsigned int) RELOC_BASE13
4475 || r_type == (unsigned int) RELOC_BASE22)
4477 struct external_nlist *sym;
4480 /* For base relative relocs, r_index is always an index
4481 into the symbol table, even if r_extern is 0. */
4482 sym = syms + r_index;
4483 type = H_GET_8 (input_bfd, sym->e_type);
4484 if ((type & N_TYPE) == N_TEXT
4486 r_section = obj_textsec (input_bfd);
4487 else if ((type & N_TYPE) == N_DATA
4489 r_section = obj_datasec (input_bfd);
4490 else if ((type & N_TYPE) == N_BSS
4492 r_section = obj_bsssec (input_bfd);
4493 else if ((type & N_TYPE) == N_ABS
4495 r_section = bfd_abs_section_ptr;
4498 relocation = (r_section->output_section->vma
4499 + r_section->output_offset
4500 + (GET_WORD (input_bfd, sym->e_value)
4505 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4507 /* If this is a PC relative reloc, then R_ADDEND is the
4508 difference between the two vmas, or
4509 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4511 old_dest_sec == section->vma
4513 old_src_sec == input_section->vma
4515 old_src_off == r_addr
4517 _bfd_final_link_relocate expects RELOCATION +
4518 R_ADDEND to be the VMA of the destination minus
4519 r_addr (the minus r_addr is because this relocation
4520 is not pcrel_offset, which is a bit confusing and
4521 should, perhaps, be changed), or
4524 new_dest_sec == output_section->vma + output_offset
4525 We arrange for this to happen by setting RELOCATION to
4526 new_dest_sec + old_src_sec - old_dest_sec
4528 If this is not a PC relative reloc, then R_ADDEND is
4529 simply the VMA of the destination, so we set
4530 RELOCATION to the change in the destination VMA, or
4531 new_dest_sec - old_dest_sec
4533 relocation = (r_section->output_section->vma
4534 + r_section->output_offset
4536 if (howto_table_ext[r_type].pc_relative)
4537 relocation += input_section->vma;
4540 if (check_dynamic_reloc != NULL)
4544 if (! ((*check_dynamic_reloc)
4545 (finfo->info, input_bfd, input_section, h,
4546 (void *) rel, contents, &skip, &relocation)))
4552 /* Now warn if a global symbol is undefined. We could not
4553 do this earlier, because check_dynamic_reloc might want
4554 to skip this reloc. */
4556 && ! finfo->info->shared
4557 && r_type != (unsigned int) RELOC_BASE10
4558 && r_type != (unsigned int) RELOC_BASE13
4559 && r_type != (unsigned int) RELOC_BASE22)
4564 name = h->root.root.string;
4566 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4567 if (! ((*finfo->info->callbacks->undefined_symbol)
4568 (finfo->info, name, input_bfd, input_section,
4573 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4574 r = MY_final_link_relocate (howto_table_ext + r_type,
4575 input_bfd, input_section,
4576 contents, r_addr, relocation,
4582 x = bfd_get_32 (input_bfd, contents + r_addr);
4583 x = x + relocation + r_addend;
4584 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4588 if (r != bfd_reloc_ok)
4593 case bfd_reloc_outofrange:
4595 case bfd_reloc_overflow:
4602 || r_type == (unsigned int) RELOC_BASE10
4603 || r_type == (unsigned int) RELOC_BASE13
4604 || r_type == (unsigned int) RELOC_BASE22)
4605 name = strings + GET_WORD (input_bfd,
4606 syms[r_index].e_strx);
4611 s = aout_reloc_index_to_section (input_bfd, r_index);
4612 name = bfd_section_name (input_bfd, s);
4614 if (! ((*finfo->info->callbacks->reloc_overflow)
4615 (finfo->info, (h ? &h->root : NULL), name,
4616 howto_table_ext[r_type].name,
4617 r_addend, input_bfd, input_section, r_addr)))
4629 /* Link an a.out section into the output file. */
4632 aout_link_input_section (struct aout_final_link_info *finfo,
4634 asection *input_section,
4635 file_ptr *reloff_ptr,
4636 bfd_size_type rel_size)
4638 bfd_size_type input_size;
4641 /* Get the section contents. */
4642 input_size = input_section->size;
4643 if (! bfd_get_section_contents (input_bfd, input_section,
4644 (void *) finfo->contents,
4645 (file_ptr) 0, input_size))
4648 /* Read in the relocs if we haven't already done it. */
4649 if (aout_section_data (input_section) != NULL
4650 && aout_section_data (input_section)->relocs != NULL)
4651 relocs = aout_section_data (input_section)->relocs;
4654 relocs = finfo->relocs;
4657 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4658 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4663 /* Relocate the section contents. */
4664 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4666 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4667 (struct reloc_std_external *) relocs,
4668 rel_size, finfo->contents))
4673 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4674 (struct reloc_ext_external *) relocs,
4675 rel_size, finfo->contents))
4679 /* Write out the section contents. */
4680 if (! bfd_set_section_contents (finfo->output_bfd,
4681 input_section->output_section,
4682 (void *) finfo->contents,
4683 (file_ptr) input_section->output_offset,
4687 /* If we are producing relocatable output, the relocs were
4688 modified, and we now write them out. */
4689 if (finfo->info->relocatable && rel_size > 0)
4691 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4693 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size)
4695 *reloff_ptr += rel_size;
4697 /* Assert that the relocs have not run into the symbols, and
4698 that if these are the text relocs they have not run into the
4700 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4701 && (reloff_ptr != &finfo->treloff
4703 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4709 /* Adjust and write out the symbols for an a.out file. Set the new
4710 symbol indices into a symbol_map. */
4713 aout_link_write_symbols (struct aout_final_link_info *finfo, bfd *input_bfd)
4716 bfd_size_type sym_count;
4718 enum bfd_link_strip strip;
4719 enum bfd_link_discard discard;
4720 struct external_nlist *outsym;
4721 bfd_size_type strtab_index;
4722 struct external_nlist *sym;
4723 struct external_nlist *sym_end;
4724 struct aout_link_hash_entry **sym_hash;
4727 bfd_boolean skip_next;
4729 output_bfd = finfo->output_bfd;
4730 sym_count = obj_aout_external_sym_count (input_bfd);
4731 strings = obj_aout_external_strings (input_bfd);
4732 strip = finfo->info->strip;
4733 discard = finfo->info->discard;
4734 outsym = finfo->output_syms;
4736 /* First write out a symbol for this object file, unless we are
4737 discarding such symbols. */
4738 if (strip != strip_all
4739 && (strip != strip_some
4740 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4741 FALSE, FALSE) != NULL)
4742 && discard != discard_all)
4744 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4745 H_PUT_8 (output_bfd, 0, outsym->e_other);
4746 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4747 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4748 input_bfd->filename, FALSE);
4749 if (strtab_index == (bfd_size_type) -1)
4751 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4752 PUT_WORD (output_bfd,
4753 (bfd_get_section_vma (output_bfd,
4754 obj_textsec (input_bfd)->output_section)
4755 + obj_textsec (input_bfd)->output_offset),
4757 ++obj_aout_external_sym_count (output_bfd);
4763 sym = obj_aout_external_syms (input_bfd);
4764 sym_end = sym + sym_count;
4765 sym_hash = obj_aout_sym_hashes (input_bfd);
4766 symbol_map = finfo->symbol_map;
4767 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4768 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4772 struct aout_link_hash_entry *h;
4778 /* We set *symbol_map to 0 above for all symbols. If it has
4779 already been set to -1 for this symbol, it means that we are
4780 discarding it because it appears in a duplicate header file.
4781 See the N_BINCL code below. */
4782 if (*symbol_map == -1)
4785 /* Initialize *symbol_map to -1, which means that the symbol was
4786 not copied into the output file. We will change it later if
4787 we do copy the symbol over. */
4790 type = H_GET_8 (input_bfd, sym->e_type);
4791 name = strings + GET_WORD (input_bfd, sym->e_strx);
4797 /* Pass this symbol through. It is the target of an
4798 indirect or warning symbol. */
4799 val = GET_WORD (input_bfd, sym->e_value);
4804 /* Skip this symbol, which is the target of an indirect
4805 symbol that we have changed to no longer be an indirect
4812 struct aout_link_hash_entry *hresolve;
4814 /* We have saved the hash table entry for this symbol, if
4815 there is one. Note that we could just look it up again
4816 in the hash table, provided we first check that it is an
4820 /* Use the name from the hash table, in case the symbol was
4823 && h->root.type != bfd_link_hash_warning)
4824 name = h->root.root.string;
4826 /* If this is an indirect or warning symbol, then change
4827 hresolve to the base symbol. We also change *sym_hash so
4828 that the relocation routines relocate against the real
4831 if (h != (struct aout_link_hash_entry *) NULL
4832 && (h->root.type == bfd_link_hash_indirect
4833 || h->root.type == bfd_link_hash_warning))
4835 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4836 while (hresolve->root.type == bfd_link_hash_indirect
4837 || hresolve->root.type == bfd_link_hash_warning)
4838 hresolve = ((struct aout_link_hash_entry *)
4839 hresolve->root.u.i.link);
4840 *sym_hash = hresolve;
4843 /* If the symbol has already been written out, skip it. */
4847 if ((type & N_TYPE) == N_INDR
4848 || type == N_WARNING)
4850 *symbol_map = h->indx;
4854 /* See if we are stripping this symbol. */
4860 case strip_debugger:
4861 if ((type & N_STAB) != 0)
4865 if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE)
4880 /* Get the value of the symbol. */
4881 if ((type & N_TYPE) == N_TEXT
4883 symsec = obj_textsec (input_bfd);
4884 else if ((type & N_TYPE) == N_DATA
4886 symsec = obj_datasec (input_bfd);
4887 else if ((type & N_TYPE) == N_BSS
4889 symsec = obj_bsssec (input_bfd);
4890 else if ((type & N_TYPE) == N_ABS
4892 symsec = bfd_abs_section_ptr;
4893 else if (((type & N_TYPE) == N_INDR
4894 && (hresolve == NULL
4895 || (hresolve->root.type != bfd_link_hash_defined
4896 && hresolve->root.type != bfd_link_hash_defweak
4897 && hresolve->root.type != bfd_link_hash_common)))
4898 || type == N_WARNING)
4900 /* Pass the next symbol through unchanged. The
4901 condition above for indirect symbols is so that if
4902 the indirect symbol was defined, we output it with
4903 the correct definition so the debugger will
4906 val = GET_WORD (input_bfd, sym->e_value);
4909 else if ((type & N_STAB) != 0)
4911 val = GET_WORD (input_bfd, sym->e_value);
4916 /* If we get here with an indirect symbol, it means that
4917 we are outputting it with a real definition. In such
4918 a case we do not want to output the next symbol,
4919 which is the target of the indirection. */
4920 if ((type & N_TYPE) == N_INDR)
4925 /* We need to get the value from the hash table. We use
4926 hresolve so that if we have defined an indirect
4927 symbol we output the final definition. */
4930 switch (type & N_TYPE)
4933 symsec = obj_textsec (input_bfd);
4936 symsec = obj_datasec (input_bfd);
4939 symsec = obj_bsssec (input_bfd);
4942 symsec = bfd_abs_section_ptr;
4949 else if (hresolve->root.type == bfd_link_hash_defined
4950 || hresolve->root.type == bfd_link_hash_defweak)
4952 asection *input_section;
4953 asection *output_section;
4955 /* This case usually means a common symbol which was
4956 turned into a defined symbol. */
4957 input_section = hresolve->root.u.def.section;
4958 output_section = input_section->output_section;
4959 BFD_ASSERT (bfd_is_abs_section (output_section)
4960 || output_section->owner == output_bfd);
4961 val = (hresolve->root.u.def.value
4962 + bfd_get_section_vma (output_bfd, output_section)
4963 + input_section->output_offset);
4965 /* Get the correct type based on the section. If
4966 this is a constructed set, force it to be
4967 globally visible. */
4976 if (output_section == obj_textsec (output_bfd))
4977 type |= (hresolve->root.type == bfd_link_hash_defined
4980 else if (output_section == obj_datasec (output_bfd))
4981 type |= (hresolve->root.type == bfd_link_hash_defined
4984 else if (output_section == obj_bsssec (output_bfd))
4985 type |= (hresolve->root.type == bfd_link_hash_defined
4989 type |= (hresolve->root.type == bfd_link_hash_defined
4993 else if (hresolve->root.type == bfd_link_hash_common)
4994 val = hresolve->root.u.c.size;
4995 else if (hresolve->root.type == bfd_link_hash_undefweak)
5004 val = (symsec->output_section->vma
5005 + symsec->output_offset
5006 + (GET_WORD (input_bfd, sym->e_value)
5009 /* If this is a global symbol set the written flag, and if
5010 it is a local symbol see if we should discard it. */
5014 h->indx = obj_aout_external_sym_count (output_bfd);
5016 else if ((type & N_TYPE) != N_SETT
5017 && (type & N_TYPE) != N_SETD
5018 && (type & N_TYPE) != N_SETB
5019 && (type & N_TYPE) != N_SETA)
5024 case discard_sec_merge:
5027 if ((type & N_STAB) == 0
5028 && bfd_is_local_label_name (input_bfd, name))
5042 /* An N_BINCL symbol indicates the start of the stabs
5043 entries for a header file. We need to scan ahead to the
5044 next N_EINCL symbol, ignoring nesting, adding up all the
5045 characters in the symbol names, not including the file
5046 numbers in types (the first number after an open
5048 if (type == (int) N_BINCL)
5050 struct external_nlist *incl_sym;
5052 struct aout_link_includes_entry *incl_entry;
5053 struct aout_link_includes_totals *t;
5057 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5061 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5062 if (incl_type == (int) N_EINCL)
5068 else if (incl_type == (int) N_BINCL)
5074 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5075 for (; *s != '\0'; s++)
5080 /* Skip the file number. */
5082 while (ISDIGIT (*s))
5090 /* If we have already included a header file with the
5091 same value, then replace this one with an N_EXCL
5093 copy = (bfd_boolean) (! finfo->info->keep_memory);
5094 incl_entry = aout_link_includes_lookup (&finfo->includes,
5096 if (incl_entry == NULL)
5098 for (t = incl_entry->totals; t != NULL; t = t->next)
5099 if (t->total == val)
5103 /* This is the first time we have seen this header
5104 file with this set of stabs strings. */
5105 t = bfd_hash_allocate (&finfo->includes.root,
5110 t->next = incl_entry->totals;
5111 incl_entry->totals = t;
5117 /* This is a duplicate header file. We must change
5118 it to be an N_EXCL entry, and mark all the
5119 included symbols to prevent outputting them. */
5120 type = (int) N_EXCL;
5123 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5125 incl_sym++, incl_map++)
5129 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5130 if (incl_type == (int) N_EINCL)
5139 else if (incl_type == (int) N_BINCL)
5148 /* Copy this symbol into the list of symbols we are going to
5150 H_PUT_8 (output_bfd, type, outsym->e_type);
5151 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5152 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5154 if (! finfo->info->keep_memory)
5156 /* name points into a string table which we are going to
5157 free. If there is a hash table entry, use that string.
5158 Otherwise, copy name into memory. */
5160 name = h->root.root.string;
5164 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
5166 if (strtab_index == (bfd_size_type) -1)
5168 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5169 PUT_WORD (output_bfd, val, outsym->e_value);
5170 *symbol_map = obj_aout_external_sym_count (output_bfd);
5171 ++obj_aout_external_sym_count (output_bfd);
5175 /* Write out the output symbols we have just constructed. */
5176 if (outsym > finfo->output_syms)
5178 bfd_size_type outsym_size;
5180 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
5182 outsym_size = outsym - finfo->output_syms;
5183 outsym_size *= EXTERNAL_NLIST_SIZE;
5184 if (bfd_bwrite ((void *) finfo->output_syms, outsym_size, output_bfd)
5187 finfo->symoff += outsym_size;
5193 /* Link an a.out input BFD into the output file. */
5196 aout_link_input_bfd (struct aout_final_link_info *finfo, bfd *input_bfd)
5198 bfd_size_type sym_count;
5200 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5202 /* If this is a dynamic object, it may need special handling. */
5203 if ((input_bfd->flags & DYNAMIC) != 0
5204 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5205 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5206 (finfo->info, input_bfd));
5208 /* Get the symbols. We probably have them already, unless
5209 finfo->info->keep_memory is FALSE. */
5210 if (! aout_get_external_symbols (input_bfd))
5213 sym_count = obj_aout_external_sym_count (input_bfd);
5215 /* Write out the symbols and get a map of the new indices. The map
5216 is placed into finfo->symbol_map. */
5217 if (! aout_link_write_symbols (finfo, input_bfd))
5220 /* Relocate and write out the sections. These functions use the
5221 symbol map created by aout_link_write_symbols. The linker_mark
5222 field will be set if these sections are to be included in the
5223 link, which will normally be the case. */
5224 if (obj_textsec (input_bfd)->linker_mark)
5226 if (! aout_link_input_section (finfo, input_bfd,
5227 obj_textsec (input_bfd),
5229 exec_hdr (input_bfd)->a_trsize))
5232 if (obj_datasec (input_bfd)->linker_mark)
5234 if (! aout_link_input_section (finfo, input_bfd,
5235 obj_datasec (input_bfd),
5237 exec_hdr (input_bfd)->a_drsize))
5241 /* If we are not keeping memory, we don't need the symbols any
5242 longer. We still need them if we are keeping memory, because the
5243 strings in the hash table point into them. */
5244 if (! finfo->info->keep_memory)
5246 if (! aout_link_free_symbols (input_bfd))
5253 /* Do the final link step. This is called on the output BFD. The
5254 INFO structure should point to a list of BFDs linked through the
5255 link_next field which can be used to find each BFD which takes part
5256 in the output. Also, each section in ABFD should point to a list
5257 of bfd_link_order structures which list all the input sections for
5258 the output section. */
5261 NAME (aout, final_link) (bfd *abfd,
5262 struct bfd_link_info *info,
5263 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5265 struct aout_final_link_info aout_info;
5266 bfd_boolean includes_hash_initialized = FALSE;
5268 bfd_size_type trsize, drsize;
5269 bfd_size_type max_contents_size;
5270 bfd_size_type max_relocs_size;
5271 bfd_size_type max_sym_count;
5272 bfd_size_type text_size;
5274 struct bfd_link_order *p;
5276 bfd_boolean have_link_order_relocs;
5279 abfd->flags |= DYNAMIC;
5281 aout_info.info = info;
5282 aout_info.output_bfd = abfd;
5283 aout_info.contents = NULL;
5284 aout_info.relocs = NULL;
5285 aout_info.symbol_map = NULL;
5286 aout_info.output_syms = NULL;
5288 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5289 aout_link_includes_newfunc,
5290 sizeof (struct aout_link_includes_entry),
5293 includes_hash_initialized = TRUE;
5295 /* Figure out the largest section size. Also, if generating
5296 relocatable output, count the relocs. */
5299 max_contents_size = 0;
5300 max_relocs_size = 0;
5302 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5306 if (info->relocatable)
5308 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5310 trsize += exec_hdr (sub)->a_trsize;
5311 drsize += exec_hdr (sub)->a_drsize;
5315 /* FIXME: We need to identify the .text and .data sections
5316 and call get_reloc_upper_bound and canonicalize_reloc to
5317 work out the number of relocs needed, and then multiply
5318 by the reloc size. */
5319 (*_bfd_error_handler)
5320 (_("%s: relocatable link from %s to %s not supported"),
5321 bfd_get_filename (abfd),
5322 sub->xvec->name, abfd->xvec->name);
5323 bfd_set_error (bfd_error_invalid_operation);
5328 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5330 sz = obj_textsec (sub)->size;
5331 if (sz > max_contents_size)
5332 max_contents_size = sz;
5333 sz = obj_datasec (sub)->size;
5334 if (sz > max_contents_size)
5335 max_contents_size = sz;
5337 sz = exec_hdr (sub)->a_trsize;
5338 if (sz > max_relocs_size)
5339 max_relocs_size = sz;
5340 sz = exec_hdr (sub)->a_drsize;
5341 if (sz > max_relocs_size)
5342 max_relocs_size = sz;
5344 sz = obj_aout_external_sym_count (sub);
5345 if (sz > max_sym_count)
5350 if (info->relocatable)
5352 if (obj_textsec (abfd) != NULL)
5353 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5354 ->map_head.link_order)
5355 * obj_reloc_entry_size (abfd));
5356 if (obj_datasec (abfd) != NULL)
5357 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5358 ->map_head.link_order)
5359 * obj_reloc_entry_size (abfd));
5362 exec_hdr (abfd)->a_trsize = trsize;
5363 exec_hdr (abfd)->a_drsize = drsize;
5365 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5367 /* Adjust the section sizes and vmas according to the magic number.
5368 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5369 filepos for each section. */
5370 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
5373 /* The relocation and symbol file positions differ among a.out
5374 targets. We are passed a callback routine from the backend
5375 specific code to handle this.
5376 FIXME: At this point we do not know how much space the symbol
5377 table will require. This will not work for any (nonstandard)
5378 a.out target that needs to know the symbol table size before it
5379 can compute the relocation file positions. This may or may not
5380 be the case for the hp300hpux target, for example. */
5381 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5383 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5384 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5385 obj_sym_filepos (abfd) = aout_info.symoff;
5387 /* We keep a count of the symbols as we output them. */
5388 obj_aout_external_sym_count (abfd) = 0;
5390 /* We accumulate the string table as we write out the symbols. */
5391 aout_info.strtab = _bfd_stringtab_init ();
5392 if (aout_info.strtab == NULL)
5395 /* Allocate buffers to hold section contents and relocs. */
5396 aout_info.contents = bfd_malloc (max_contents_size);
5397 aout_info.relocs = bfd_malloc (max_relocs_size);
5398 aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *));
5399 aout_info.output_syms = bfd_malloc ((max_sym_count + 1)
5400 * sizeof (struct external_nlist));
5401 if ((aout_info.contents == NULL && max_contents_size != 0)
5402 || (aout_info.relocs == NULL && max_relocs_size != 0)
5403 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5404 || aout_info.output_syms == NULL)
5407 /* If we have a symbol named __DYNAMIC, force it out now. This is
5408 required by SunOS. Doing this here rather than in sunos.c is a
5409 hack, but it's easier than exporting everything which would be
5412 struct aout_link_hash_entry *h;
5414 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5415 FALSE, FALSE, FALSE);
5417 aout_link_write_other_symbol (h, &aout_info);
5420 /* The most time efficient way to do the link would be to read all
5421 the input object files into memory and then sort out the
5422 information into the output file. Unfortunately, that will
5423 probably use too much memory. Another method would be to step
5424 through everything that composes the text section and write it
5425 out, and then everything that composes the data section and write
5426 it out, and then write out the relocs, and then write out the
5427 symbols. Unfortunately, that requires reading stuff from each
5428 input file several times, and we will not be able to keep all the
5429 input files open simultaneously, and reopening them will be slow.
5431 What we do is basically process one input file at a time. We do
5432 everything we need to do with an input file once--copy over the
5433 section contents, handle the relocation information, and write
5434 out the symbols--and then we throw away the information we read
5435 from it. This approach requires a lot of lseeks of the output
5436 file, which is unfortunate but still faster than reopening a lot
5439 We use the output_has_begun field of the input BFDs to see
5440 whether we have already handled it. */
5441 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5442 sub->output_has_begun = FALSE;
5444 /* Mark all sections which are to be included in the link. This
5445 will normally be every section. We need to do this so that we
5446 can identify any sections which the linker has decided to not
5448 for (o = abfd->sections; o != NULL; o = o->next)
5450 for (p = o->map_head.link_order; p != NULL; p = p->next)
5451 if (p->type == bfd_indirect_link_order)
5452 p->u.indirect.section->linker_mark = TRUE;
5455 have_link_order_relocs = FALSE;
5456 for (o = abfd->sections; o != NULL; o = o->next)
5458 for (p = o->map_head.link_order;
5462 if (p->type == bfd_indirect_link_order
5463 && (bfd_get_flavour (p->u.indirect.section->owner)
5464 == bfd_target_aout_flavour))
5468 input_bfd = p->u.indirect.section->owner;
5469 if (! input_bfd->output_has_begun)
5471 if (! aout_link_input_bfd (&aout_info, input_bfd))
5473 input_bfd->output_has_begun = TRUE;
5476 else if (p->type == bfd_section_reloc_link_order
5477 || p->type == bfd_symbol_reloc_link_order)
5479 /* These are handled below. */
5480 have_link_order_relocs = TRUE;
5484 if (! _bfd_default_link_order (abfd, info, o, p))
5490 /* Write out any symbols that we have not already written out. */
5491 aout_link_hash_traverse (aout_hash_table (info),
5492 aout_link_write_other_symbol,
5493 (void *) &aout_info);
5495 /* Now handle any relocs we were asked to create by the linker.
5496 These did not come from any input file. We must do these after
5497 we have written out all the symbols, so that we know the symbol
5499 if (have_link_order_relocs)
5501 for (o = abfd->sections; o != NULL; o = o->next)
5503 for (p = o->map_head.link_order;
5507 if (p->type == bfd_section_reloc_link_order
5508 || p->type == bfd_symbol_reloc_link_order)
5510 if (! aout_link_reloc_link_order (&aout_info, o, p))
5517 if (aout_info.contents != NULL)
5519 free (aout_info.contents);
5520 aout_info.contents = NULL;
5522 if (aout_info.relocs != NULL)
5524 free (aout_info.relocs);
5525 aout_info.relocs = NULL;
5527 if (aout_info.symbol_map != NULL)
5529 free (aout_info.symbol_map);
5530 aout_info.symbol_map = NULL;
5532 if (aout_info.output_syms != NULL)
5534 free (aout_info.output_syms);
5535 aout_info.output_syms = NULL;
5537 if (includes_hash_initialized)
5539 bfd_hash_table_free (&aout_info.includes.root);
5540 includes_hash_initialized = FALSE;
5543 /* Finish up any dynamic linking we may be doing. */
5544 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5546 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5550 /* Update the header information. */
5551 abfd->symcount = obj_aout_external_sym_count (abfd);
5552 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5553 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5554 obj_textsec (abfd)->reloc_count =
5555 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5556 obj_datasec (abfd)->reloc_count =
5557 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5559 /* Write out the string table, unless there are no symbols. */
5560 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
5562 if (abfd->symcount > 0)
5564 if (!emit_stringtab (abfd, aout_info.strtab))
5569 bfd_byte b[BYTES_IN_WORD];
5571 memset (b, 0, BYTES_IN_WORD);
5572 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
5579 if (aout_info.contents != NULL)
5580 free (aout_info.contents);
5581 if (aout_info.relocs != NULL)
5582 free (aout_info.relocs);
5583 if (aout_info.symbol_map != NULL)
5584 free (aout_info.symbol_map);
5585 if (aout_info.output_syms != NULL)
5586 free (aout_info.output_syms);
5587 if (includes_hash_initialized)
5588 bfd_hash_table_free (&aout_info.includes.root);