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 cached_size *= sizeof (aout_symbol_type);
1743 cached = bfd_zmalloc (cached_size);
1744 if (cached == NULL && cached_size != 0)
1747 /* Convert from external symbol information to internal. */
1748 if (! (NAME (aout, translate_symbol_table)
1750 obj_aout_external_syms (abfd),
1751 obj_aout_external_sym_count (abfd),
1752 obj_aout_external_strings (abfd),
1753 obj_aout_external_string_size (abfd),
1760 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1762 obj_aout_symbols (abfd) = cached;
1764 /* It is very likely that anybody who calls this function will not
1765 want the external symbol information, so if it was allocated
1766 because of our call to aout_get_external_symbols, we free it up
1767 right away to save space. */
1768 if (old_external_syms == NULL
1769 && obj_aout_external_syms (abfd) != NULL)
1772 bfd_free_window (&obj_aout_sym_window (abfd));
1774 free (obj_aout_external_syms (abfd));
1776 obj_aout_external_syms (abfd) = NULL;
1782 /* We use a hash table when writing out symbols so that we only write
1783 out a particular string once. This helps particularly when the
1784 linker writes out stabs debugging entries, because each different
1785 contributing object file tends to have many duplicate stabs
1788 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1789 if BFD_TRADITIONAL_FORMAT is set. */
1791 /* Get the index of a string in a strtab, adding it if it is not
1794 static inline bfd_size_type
1795 add_to_stringtab (bfd *abfd,
1796 struct bfd_strtab_hash *tab,
1801 bfd_size_type index;
1803 /* An index of 0 always means the empty string. */
1804 if (str == 0 || *str == '\0')
1807 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1808 doesn't understand a hashed string table. */
1810 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1813 index = _bfd_stringtab_add (tab, str, hash, copy);
1815 if (index != (bfd_size_type) -1)
1816 /* Add BYTES_IN_WORD to the return value to account for the
1817 space taken up by the string table size. */
1818 index += BYTES_IN_WORD;
1823 /* Write out a strtab. ABFD is already at the right location in the
1827 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1829 bfd_byte buffer[BYTES_IN_WORD];
1830 bfd_size_type amt = BYTES_IN_WORD;
1832 /* The string table starts with the size. */
1833 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1834 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1837 return _bfd_stringtab_emit (abfd, tab);
1841 NAME (aout, write_syms) (bfd *abfd)
1843 unsigned int count ;
1844 asymbol **generic = bfd_get_outsymbols (abfd);
1845 struct bfd_strtab_hash *strtab;
1847 strtab = _bfd_stringtab_init ();
1851 for (count = 0; count < bfd_get_symcount (abfd); count++)
1853 asymbol *g = generic[count];
1855 struct external_nlist nsp;
1858 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1859 if (indx == (bfd_size_type) -1)
1861 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1863 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1865 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1866 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1867 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1871 H_PUT_16 (abfd, 0, nsp.e_desc);
1872 H_PUT_8 (abfd, 0, nsp.e_other);
1873 H_PUT_8 (abfd, 0, nsp.e_type);
1876 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1879 amt = EXTERNAL_NLIST_SIZE;
1880 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1883 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1884 here, at the end. */
1888 if (! emit_stringtab (abfd, strtab))
1891 _bfd_stringtab_free (strtab);
1896 _bfd_stringtab_free (strtab);
1901 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1903 unsigned int counter = 0;
1904 aout_symbol_type *symbase;
1906 if (!NAME (aout, slurp_symbol_table) (abfd))
1909 for (symbase = obj_aout_symbols (abfd);
1910 counter++ < bfd_get_symcount (abfd);
1912 *(location++) = (asymbol *) (symbase++);
1914 return bfd_get_symcount (abfd);
1917 /* Standard reloc stuff. */
1918 /* Output standard relocation information to a file in target byte order. */
1920 extern void NAME (aout, swap_std_reloc_out)
1921 (bfd *, arelent *, struct reloc_std_external *);
1924 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1926 struct reloc_std_external *natptr)
1929 asymbol *sym = *(g->sym_ptr_ptr);
1931 unsigned int r_length;
1933 int r_baserel, r_jmptable, r_relative;
1934 asection *output_section = sym->section->output_section;
1936 PUT_WORD (abfd, g->address, natptr->r_address);
1938 r_length = g->howto->size ; /* Size as a power of two. */
1939 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1940 /* XXX This relies on relocs coming from a.out files. */
1941 r_baserel = (g->howto->type & 8) != 0;
1942 r_jmptable = (g->howto->type & 16) != 0;
1943 r_relative = (g->howto->type & 32) != 0;
1945 /* Name was clobbered by aout_write_syms to be symbol index. */
1947 /* If this relocation is relative to a symbol then set the
1948 r_index to the symbols index, and the r_extern bit.
1950 Absolute symbols can come in in two ways, either as an offset
1951 from the abs section, or as a symbol which has an abs value.
1952 check for that here. */
1954 if (bfd_is_com_section (output_section)
1955 || bfd_is_abs_section (output_section)
1956 || bfd_is_und_section (output_section)
1957 /* PR gas/3041 a.out relocs against weak symbols
1958 must be treated as if they were against externs. */
1959 || (sym->flags & BSF_WEAK))
1961 if (bfd_abs_section_ptr->symbol == sym)
1963 /* Whoops, looked like an abs symbol, but is
1964 really an offset from the abs section. */
1970 /* Fill in symbol. */
1972 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1977 /* Just an ordinary section. */
1979 r_index = output_section->target_index;
1982 /* Now the fun stuff. */
1983 if (bfd_header_big_endian (abfd))
1985 natptr->r_index[0] = r_index >> 16;
1986 natptr->r_index[1] = r_index >> 8;
1987 natptr->r_index[2] = r_index;
1988 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
1989 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
1990 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
1991 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
1992 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
1993 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
1997 natptr->r_index[2] = r_index >> 16;
1998 natptr->r_index[1] = r_index >> 8;
1999 natptr->r_index[0] = r_index;
2000 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2001 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2002 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2003 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2004 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2005 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2009 /* Extended stuff. */
2010 /* Output extended relocation information to a file in target byte order. */
2012 extern void NAME (aout, swap_ext_reloc_out)
2013 (bfd *, arelent *, struct reloc_ext_external *);
2016 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2018 struct reloc_ext_external *natptr)
2022 unsigned int r_type;
2024 asymbol *sym = *(g->sym_ptr_ptr);
2025 asection *output_section = sym->section->output_section;
2027 PUT_WORD (abfd, g->address, natptr->r_address);
2029 r_type = (unsigned int) g->howto->type;
2031 r_addend = g->addend;
2032 if ((sym->flags & BSF_SECTION_SYM) != 0)
2033 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2035 /* If this relocation is relative to a symbol then set the
2036 r_index to the symbols index, and the r_extern bit.
2038 Absolute symbols can come in in two ways, either as an offset
2039 from the abs section, or as a symbol which has an abs value.
2040 check for that here. */
2041 if (bfd_is_abs_section (bfd_get_section (sym)))
2046 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2048 if (bfd_is_und_section (bfd_get_section (sym))
2049 || (sym->flags & BSF_GLOBAL) != 0)
2053 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2057 /* Just an ordinary section. */
2059 r_index = output_section->target_index;
2062 /* Now the fun stuff. */
2063 if (bfd_header_big_endian (abfd))
2065 natptr->r_index[0] = r_index >> 16;
2066 natptr->r_index[1] = r_index >> 8;
2067 natptr->r_index[2] = r_index;
2068 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2069 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2073 natptr->r_index[2] = r_index >> 16;
2074 natptr->r_index[1] = r_index >> 8;
2075 natptr->r_index[0] = r_index;
2076 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2077 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2080 PUT_WORD (abfd, r_addend, natptr->r_addend);
2083 /* BFD deals internally with all things based from the section they're
2084 in. so, something in 10 bytes into a text section with a base of
2085 50 would have a symbol (.text+10) and know .text vma was 50.
2087 Aout keeps all it's symbols based from zero, so the symbol would
2088 contain 60. This macro subs the base of each section from the value
2089 to give the true offset from the section. */
2091 #define MOVE_ADDRESS(ad) \
2094 /* Undefined symbol. */ \
2095 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2096 cache_ptr->addend = ad; \
2100 /* Defined, section relative. Replace symbol with pointer to \
2101 symbol which points to section. */ \
2105 case N_TEXT | N_EXT: \
2106 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2107 cache_ptr->addend = ad - su->textsec->vma; \
2110 case N_DATA | N_EXT: \
2111 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2112 cache_ptr->addend = ad - su->datasec->vma; \
2115 case N_BSS | N_EXT: \
2116 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2117 cache_ptr->addend = ad - su->bsssec->vma; \
2121 case N_ABS | N_EXT: \
2122 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2123 cache_ptr->addend = ad; \
2129 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2130 struct reloc_ext_external *bytes,
2133 bfd_size_type symcount)
2135 unsigned int r_index;
2137 unsigned int r_type;
2138 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2140 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2142 /* Now the fun stuff. */
2143 if (bfd_header_big_endian (abfd))
2145 r_index = (((unsigned int) bytes->r_index[0] << 16)
2146 | ((unsigned int) bytes->r_index[1] << 8)
2147 | bytes->r_index[2]);
2148 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2149 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2150 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2154 r_index = (((unsigned int) bytes->r_index[2] << 16)
2155 | ((unsigned int) bytes->r_index[1] << 8)
2156 | bytes->r_index[0]);
2157 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2158 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2159 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2162 cache_ptr->howto = howto_table_ext + r_type;
2164 /* Base relative relocs are always against the symbol table,
2165 regardless of the setting of r_extern. r_extern just reflects
2166 whether the symbol the reloc is against is local or global. */
2167 if (r_type == (unsigned int) RELOC_BASE10
2168 || r_type == (unsigned int) RELOC_BASE13
2169 || r_type == (unsigned int) RELOC_BASE22)
2172 if (r_extern && r_index > symcount)
2174 /* We could arrange to return an error, but it might be useful
2175 to see the file even if it is bad. */
2180 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2184 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2185 struct reloc_std_external *bytes,
2188 bfd_size_type symcount)
2190 unsigned int r_index;
2192 unsigned int r_length;
2194 int r_baserel, r_jmptable, r_relative;
2195 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2196 unsigned int howto_idx;
2198 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2200 /* Now the fun stuff. */
2201 if (bfd_header_big_endian (abfd))
2203 r_index = (((unsigned int) bytes->r_index[0] << 16)
2204 | ((unsigned int) bytes->r_index[1] << 8)
2205 | bytes->r_index[2]);
2206 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2207 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2208 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2209 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2210 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2211 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2212 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2216 r_index = (((unsigned int) bytes->r_index[2] << 16)
2217 | ((unsigned int) bytes->r_index[1] << 8)
2218 | bytes->r_index[0]);
2219 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2220 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2221 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2222 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2223 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2224 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2225 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2228 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2229 + 16 * r_jmptable + 32 * r_relative);
2230 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2231 cache_ptr->howto = howto_table_std + howto_idx;
2232 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2234 /* Base relative relocs are always against the symbol table,
2235 regardless of the setting of r_extern. r_extern just reflects
2236 whether the symbol the reloc is against is local or global. */
2240 if (r_extern && r_index > symcount)
2242 /* We could arrange to return an error, but it might be useful
2243 to see the file even if it is bad. */
2251 /* Read and swap the relocs for a section. */
2254 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2256 bfd_size_type count;
2257 bfd_size_type reloc_size;
2259 arelent *reloc_cache;
2261 unsigned int counter = 0;
2265 if (asect->relocation)
2268 if (asect->flags & SEC_CONSTRUCTOR)
2271 if (asect == obj_datasec (abfd))
2272 reloc_size = exec_hdr (abfd)->a_drsize;
2273 else if (asect == obj_textsec (abfd))
2274 reloc_size = exec_hdr (abfd)->a_trsize;
2275 else if (asect == obj_bsssec (abfd))
2279 bfd_set_error (bfd_error_invalid_operation);
2283 if (reloc_size == 0)
2284 return TRUE; /* Nothing to be done. */
2286 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2289 each_size = obj_reloc_entry_size (abfd);
2291 count = reloc_size / each_size;
2293 return TRUE; /* Nothing to be done. */
2295 amt = count * sizeof (arelent);
2296 reloc_cache = bfd_zmalloc (amt);
2297 if (reloc_cache == NULL)
2300 relocs = bfd_malloc (reloc_size);
2307 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2314 cache_ptr = reloc_cache;
2315 if (each_size == RELOC_EXT_SIZE)
2317 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2319 for (; counter < count; counter++, rptr++, cache_ptr++)
2320 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2321 (bfd_size_type) bfd_get_symcount (abfd));
2325 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2327 for (; counter < count; counter++, rptr++, cache_ptr++)
2328 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2329 (bfd_size_type) bfd_get_symcount (abfd));
2334 asect->relocation = reloc_cache;
2335 asect->reloc_count = cache_ptr - reloc_cache;
2340 /* Write out a relocation section into an object file. */
2343 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2346 unsigned char *native, *natptr;
2349 unsigned int count = section->reloc_count;
2350 bfd_size_type natsize;
2352 if (count == 0 || section->orelocation == NULL)
2355 each_size = obj_reloc_entry_size (abfd);
2356 natsize = (bfd_size_type) each_size * count;
2357 native = bfd_zalloc (abfd, natsize);
2361 generic = section->orelocation;
2363 if (each_size == RELOC_EXT_SIZE)
2365 for (natptr = native;
2367 --count, natptr += each_size, ++generic)
2368 MY_swap_ext_reloc_out (abfd, *generic,
2369 (struct reloc_ext_external *) natptr);
2373 for (natptr = native;
2375 --count, natptr += each_size, ++generic)
2376 MY_swap_std_reloc_out (abfd, *generic,
2377 (struct reloc_std_external *) natptr);
2380 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2382 bfd_release (abfd, native);
2385 bfd_release (abfd, native);
2390 /* This is stupid. This function should be a boolean predicate. */
2393 NAME (aout, canonicalize_reloc) (bfd *abfd,
2398 arelent *tblptr = section->relocation;
2401 if (section == obj_bsssec (abfd))
2407 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2410 if (section->flags & SEC_CONSTRUCTOR)
2412 arelent_chain *chain = section->constructor_chain;
2413 for (count = 0; count < section->reloc_count; count ++)
2415 *relptr ++ = &chain->relent;
2416 chain = chain->next;
2421 tblptr = section->relocation;
2423 for (count = 0; count++ < section->reloc_count; )
2425 *relptr++ = tblptr++;
2430 return section->reloc_count;
2434 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2436 if (bfd_get_format (abfd) != bfd_object)
2438 bfd_set_error (bfd_error_invalid_operation);
2442 if (asect->flags & SEC_CONSTRUCTOR)
2443 return sizeof (arelent *) * (asect->reloc_count + 1);
2445 if (asect == obj_datasec (abfd))
2446 return sizeof (arelent *)
2447 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2450 if (asect == obj_textsec (abfd))
2451 return sizeof (arelent *)
2452 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2455 if (asect == obj_bsssec (abfd))
2456 return sizeof (arelent *);
2458 if (asect == obj_bsssec (abfd))
2461 bfd_set_error (bfd_error_invalid_operation);
2466 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2468 if (!NAME (aout, slurp_symbol_table) (abfd))
2471 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2475 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2476 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2482 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2486 bfd_symbol_info (symbol, ret);
2488 if (ret->type == '?')
2490 int type_code = aout_symbol (symbol)->type & 0xff;
2491 const char *stab_name = bfd_get_stab_name (type_code);
2492 static char buf[10];
2494 if (stab_name == NULL)
2496 sprintf (buf, "(%d)", type_code);
2500 ret->stab_type = type_code;
2501 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2502 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2503 ret->stab_name = stab_name;
2508 NAME (aout, print_symbol) (bfd *abfd,
2511 bfd_print_symbol_type how)
2513 FILE *file = (FILE *)afile;
2517 case bfd_print_symbol_name:
2519 fprintf (file,"%s", symbol->name);
2521 case bfd_print_symbol_more:
2522 fprintf (file,"%4x %2x %2x",
2523 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2524 (unsigned) (aout_symbol (symbol)->other & 0xff),
2525 (unsigned) (aout_symbol (symbol)->type));
2527 case bfd_print_symbol_all:
2529 const char *section_name = symbol->section->name;
2531 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2533 fprintf (file," %-5s %04x %02x %02x",
2535 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2536 (unsigned) (aout_symbol (symbol)->other & 0xff),
2537 (unsigned) (aout_symbol (symbol)->type & 0xff));
2539 fprintf (file," %s", symbol->name);
2545 /* If we don't have to allocate more than 1MB to hold the generic
2546 symbols, we use the generic minisymbol methord: it's faster, since
2547 it only translates the symbols once, not multiple times. */
2548 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2550 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2551 symbols. The minisymbol_to_symbol function translates these into
2552 BFD asymbol structures. */
2555 NAME (aout, read_minisymbols) (bfd *abfd,
2556 bfd_boolean dynamic,
2558 unsigned int *sizep)
2561 /* We could handle the dynamic symbols here as well, but it's
2562 easier to hand them off. */
2563 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2565 if (! aout_get_external_symbols (abfd))
2568 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2569 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2571 *minisymsp = (void *) obj_aout_external_syms (abfd);
2573 /* By passing the external symbols back from this routine, we are
2574 giving up control over the memory block. Clear
2575 obj_aout_external_syms, so that we do not try to free it
2577 obj_aout_external_syms (abfd) = NULL;
2579 *sizep = EXTERNAL_NLIST_SIZE;
2580 return obj_aout_external_sym_count (abfd);
2583 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2584 unmodified a.out symbol. The SYM argument is a structure returned
2585 by bfd_make_empty_symbol, which we fill in here. */
2588 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2589 bfd_boolean dynamic,
2590 const void * minisym,
2594 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2595 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2597 memset (sym, 0, sizeof (aout_symbol_type));
2599 /* We call translate_symbol_table to translate a single symbol. */
2600 if (! (NAME (aout, translate_symbol_table)
2602 (aout_symbol_type *) sym,
2603 (struct external_nlist *) minisym,
2605 obj_aout_external_strings (abfd),
2606 obj_aout_external_string_size (abfd),
2613 /* Provided a BFD, a section and an offset into the section, calculate
2614 and return the name of the source file and the line nearest to the
2618 NAME (aout, find_nearest_line) (bfd *abfd,
2622 const char **filename_ptr,
2623 const char **functionname_ptr,
2624 unsigned int *line_ptr)
2626 /* Run down the file looking for the filename, function and linenumber. */
2628 const char *directory_name = NULL;
2629 const char *main_file_name = NULL;
2630 const char *current_file_name = NULL;
2631 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2632 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2633 bfd_vma low_line_vma = 0;
2634 bfd_vma low_func_vma = 0;
2636 bfd_size_type filelen, funclen;
2639 *filename_ptr = abfd->filename;
2640 *functionname_ptr = 0;
2643 if (symbols != NULL)
2645 for (p = symbols; *p; p++)
2647 aout_symbol_type *q = (aout_symbol_type *) (*p);
2652 /* If this looks like a file name symbol, and it comes after
2653 the line number we have found so far, but before the
2654 offset, then we have probably not found the right line
2656 if (q->symbol.value <= offset
2657 && ((q->symbol.value > low_line_vma
2658 && (line_file_name != NULL
2660 || (q->symbol.value > low_func_vma
2663 const char *symname;
2665 symname = q->symbol.name;
2666 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2668 if (q->symbol.value > low_line_vma)
2671 line_file_name = NULL;
2673 if (q->symbol.value > low_func_vma)
2680 /* If this symbol is less than the offset, but greater than
2681 the line number we have found so far, then we have not
2682 found the right line number. */
2683 if (q->symbol.value <= offset)
2685 if (q->symbol.value > low_line_vma)
2688 line_file_name = NULL;
2690 if (q->symbol.value > low_func_vma)
2694 main_file_name = current_file_name = q->symbol.name;
2695 /* Look ahead to next symbol to check if that too is an N_SO. */
2699 q = (aout_symbol_type *) (*p);
2700 if (q->type != (int)N_SO)
2703 /* Found a second N_SO First is directory; second is filename. */
2704 directory_name = current_file_name;
2705 main_file_name = current_file_name = q->symbol.name;
2706 if (obj_textsec (abfd) != section)
2710 current_file_name = q->symbol.name;
2717 /* We'll keep this if it resolves nearer than the one we have
2719 if (q->symbol.value >= low_line_vma
2720 && q->symbol.value <= offset)
2722 *line_ptr = q->desc;
2723 low_line_vma = q->symbol.value;
2724 line_file_name = current_file_name;
2725 line_directory_name = directory_name;
2730 /* We'll keep this if it is nearer than the one we have already. */
2731 if (q->symbol.value >= low_func_vma &&
2732 q->symbol.value <= offset)
2734 low_func_vma = q->symbol.value;
2735 func = (asymbol *)q;
2737 else if (q->symbol.value > offset)
2748 main_file_name = line_file_name;
2749 directory_name = line_directory_name;
2752 if (main_file_name == NULL
2753 || IS_ABSOLUTE_PATH (main_file_name)
2754 || directory_name == NULL)
2757 filelen = strlen (directory_name) + strlen (main_file_name);
2762 funclen = strlen (bfd_asymbol_name (func));
2764 if (adata (abfd).line_buf != NULL)
2765 free (adata (abfd).line_buf);
2767 if (filelen + funclen == 0)
2768 adata (abfd).line_buf = buf = NULL;
2771 buf = bfd_malloc (filelen + funclen + 3);
2772 adata (abfd).line_buf = buf;
2777 if (main_file_name != NULL)
2779 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2780 *filename_ptr = main_file_name;
2783 sprintf (buf, "%s%s", directory_name, main_file_name);
2784 *filename_ptr = buf;
2791 const char *function = func->name;
2794 /* The caller expects a symbol name. We actually have a
2795 function name, without the leading underscore. Put the
2796 underscore back in, so that the caller gets a symbol name. */
2797 if (bfd_get_symbol_leading_char (abfd) == '\0')
2798 strcpy (buf, function);
2801 buf[0] = bfd_get_symbol_leading_char (abfd);
2802 strcpy (buf + 1, function);
2804 /* Have to remove : stuff. */
2805 colon = strchr (buf, ':');
2808 *functionname_ptr = buf;
2815 NAME (aout, sizeof_headers) (bfd *abfd,
2816 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2818 return adata (abfd).exec_bytes_size;
2821 /* Free all information we have cached for this BFD. We can always
2822 read it again later if we need it. */
2825 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2829 if (bfd_get_format (abfd) != bfd_object
2830 || abfd->tdata.aout_data == NULL)
2833 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2834 BFCI_FREE (obj_aout_symbols (abfd));
2836 obj_aout_external_syms (abfd) = 0;
2837 bfd_free_window (&obj_aout_sym_window (abfd));
2838 bfd_free_window (&obj_aout_string_window (abfd));
2839 obj_aout_external_strings (abfd) = 0;
2841 BFCI_FREE (obj_aout_external_syms (abfd));
2842 BFCI_FREE (obj_aout_external_strings (abfd));
2844 for (o = abfd->sections; o != NULL; o = o->next)
2845 BFCI_FREE (o->relocation);
2851 /* a.out link code. */
2853 /* Routine to create an entry in an a.out link hash table. */
2855 struct bfd_hash_entry *
2856 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2857 struct bfd_hash_table *table,
2860 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2862 /* Allocate the structure if it has not already been allocated by a
2865 ret = bfd_hash_allocate (table, sizeof (* ret));
2869 /* Call the allocation method of the superclass. */
2870 ret = ((struct aout_link_hash_entry *)
2871 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2875 /* Set local fields. */
2876 ret->written = FALSE;
2880 return (struct bfd_hash_entry *) ret;
2883 /* Initialize an a.out link hash table. */
2886 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2888 struct bfd_hash_entry *(*newfunc)
2889 (struct bfd_hash_entry *, struct bfd_hash_table *,
2891 unsigned int entsize)
2893 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2896 /* Create an a.out link hash table. */
2898 struct bfd_link_hash_table *
2899 NAME (aout, link_hash_table_create) (bfd *abfd)
2901 struct aout_link_hash_table *ret;
2902 bfd_size_type amt = sizeof (* ret);
2904 ret = bfd_malloc (amt);
2908 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2909 NAME (aout, link_hash_newfunc),
2910 sizeof (struct aout_link_hash_entry)))
2918 /* Add all symbols from an object file to the hash table. */
2921 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2923 bfd_boolean (*add_one_symbol)
2924 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2925 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2926 struct bfd_link_hash_entry **);
2927 struct external_nlist *syms;
2928 bfd_size_type sym_count;
2931 struct aout_link_hash_entry **sym_hash;
2932 struct external_nlist *p;
2933 struct external_nlist *pend;
2936 syms = obj_aout_external_syms (abfd);
2937 sym_count = obj_aout_external_sym_count (abfd);
2938 strings = obj_aout_external_strings (abfd);
2939 if (info->keep_memory)
2944 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2946 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2947 (abfd, info, &syms, &sym_count, &strings)))
2951 /* We keep a list of the linker hash table entries that correspond
2952 to particular symbols. We could just look them up in the hash
2953 table, but keeping the list is more efficient. Perhaps this
2954 should be conditional on info->keep_memory. */
2955 amt = sym_count * sizeof (struct aout_link_hash_entry *);
2956 sym_hash = bfd_alloc (abfd, amt);
2957 if (sym_hash == NULL && sym_count != 0)
2959 obj_aout_sym_hashes (abfd) = sym_hash;
2961 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
2962 if (add_one_symbol == NULL)
2963 add_one_symbol = _bfd_generic_link_add_one_symbol;
2966 pend = p + sym_count;
2967 for (; p < pend; p++, sym_hash++)
2978 type = H_GET_8 (abfd, p->e_type);
2980 /* Ignore debugging symbols. */
2981 if ((type & N_STAB) != 0)
2984 name = strings + GET_WORD (abfd, p->e_strx);
2985 value = GET_WORD (abfd, p->e_value);
3002 /* Ignore symbols that are not externally visible. */
3005 /* Ignore local indirect symbol. */
3010 case N_UNDF | N_EXT:
3013 section = bfd_und_section_ptr;
3017 section = bfd_com_section_ptr;
3020 section = bfd_abs_section_ptr;
3022 case N_TEXT | N_EXT:
3023 section = obj_textsec (abfd);
3024 value -= bfd_get_section_vma (abfd, section);
3026 case N_DATA | N_EXT:
3027 case N_SETV | N_EXT:
3028 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3029 translate_from_native_sym_flags. */
3030 section = obj_datasec (abfd);
3031 value -= bfd_get_section_vma (abfd, section);
3034 section = obj_bsssec (abfd);
3035 value -= bfd_get_section_vma (abfd, section);
3037 case N_INDR | N_EXT:
3038 /* An indirect symbol. The next symbol is the symbol
3039 which this one really is. */
3040 BFD_ASSERT (p + 1 < pend);
3042 string = strings + GET_WORD (abfd, p->e_strx);
3043 section = bfd_ind_section_ptr;
3044 flags |= BSF_INDIRECT;
3046 case N_COMM | N_EXT:
3047 section = bfd_com_section_ptr;
3049 case N_SETA: case N_SETA | N_EXT:
3050 section = bfd_abs_section_ptr;
3051 flags |= BSF_CONSTRUCTOR;
3053 case N_SETT: case N_SETT | N_EXT:
3054 section = obj_textsec (abfd);
3055 flags |= BSF_CONSTRUCTOR;
3056 value -= bfd_get_section_vma (abfd, section);
3058 case N_SETD: case N_SETD | N_EXT:
3059 section = obj_datasec (abfd);
3060 flags |= BSF_CONSTRUCTOR;
3061 value -= bfd_get_section_vma (abfd, section);
3063 case N_SETB: case N_SETB | N_EXT:
3064 section = obj_bsssec (abfd);
3065 flags |= BSF_CONSTRUCTOR;
3066 value -= bfd_get_section_vma (abfd, section);
3069 /* A warning symbol. The next symbol is the one to warn
3070 about. If there is no next symbol, just look away. */
3075 name = strings + GET_WORD (abfd, p->e_strx);
3076 section = bfd_und_section_ptr;
3077 flags |= BSF_WARNING;
3080 section = bfd_und_section_ptr;
3084 section = bfd_abs_section_ptr;
3088 section = obj_textsec (abfd);
3089 value -= bfd_get_section_vma (abfd, section);
3093 section = obj_datasec (abfd);
3094 value -= bfd_get_section_vma (abfd, section);
3098 section = obj_bsssec (abfd);
3099 value -= bfd_get_section_vma (abfd, section);
3104 if (! ((*add_one_symbol)
3105 (info, abfd, name, flags, section, value, string, copy, FALSE,
3106 (struct bfd_link_hash_entry **) sym_hash)))
3109 /* Restrict the maximum alignment of a common symbol based on
3110 the architecture, since a.out has no way to represent
3111 alignment requirements of a section in a .o file. FIXME:
3112 This isn't quite right: it should use the architecture of the
3113 output file, not the input files. */
3114 if ((*sym_hash)->root.type == bfd_link_hash_common
3115 && ((*sym_hash)->root.u.c.p->alignment_power >
3116 bfd_get_arch_info (abfd)->section_align_power))
3117 (*sym_hash)->root.u.c.p->alignment_power =
3118 bfd_get_arch_info (abfd)->section_align_power;
3120 /* If this is a set symbol, and we are not building sets, then
3121 it is possible for the hash entry to not have been set. In
3122 such a case, treat the symbol as not globally defined. */
3123 if ((*sym_hash)->root.type == bfd_link_hash_new)
3125 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3129 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3136 /* Free up the internal symbols read from an a.out file. */
3139 aout_link_free_symbols (bfd *abfd)
3141 if (obj_aout_external_syms (abfd) != NULL)
3144 bfd_free_window (&obj_aout_sym_window (abfd));
3146 free ((void *) obj_aout_external_syms (abfd));
3148 obj_aout_external_syms (abfd) = NULL;
3150 if (obj_aout_external_strings (abfd) != NULL)
3153 bfd_free_window (&obj_aout_string_window (abfd));
3155 free ((void *) obj_aout_external_strings (abfd));
3157 obj_aout_external_strings (abfd) = NULL;
3162 /* Add symbols from an a.out object file. */
3165 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3167 if (! aout_get_external_symbols (abfd))
3169 if (! aout_link_add_symbols (abfd, info))
3171 if (! info->keep_memory)
3173 if (! aout_link_free_symbols (abfd))
3179 /* Look through the internal symbols to see if this object file should
3180 be included in the link. We should include this object file if it
3181 defines any symbols which are currently undefined. If this object
3182 file defines a common symbol, then we may adjust the size of the
3183 known symbol but we do not include the object file in the link
3184 (unless there is some other reason to include it). */
3187 aout_link_check_ar_symbols (bfd *abfd,
3188 struct bfd_link_info *info,
3189 bfd_boolean *pneeded)
3191 struct external_nlist *p;
3192 struct external_nlist *pend;
3197 /* Look through all the symbols. */
3198 p = obj_aout_external_syms (abfd);
3199 pend = p + obj_aout_external_sym_count (abfd);
3200 strings = obj_aout_external_strings (abfd);
3201 for (; p < pend; p++)
3203 int type = H_GET_8 (abfd, p->e_type);
3205 struct bfd_link_hash_entry *h;
3207 /* Ignore symbols that are not externally visible. This is an
3208 optimization only, as we check the type more thoroughly
3210 if (((type & N_EXT) == 0
3211 || (type & N_STAB) != 0
3218 if (type == N_WARNING
3224 name = strings + GET_WORD (abfd, p->e_strx);
3225 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3227 /* We are only interested in symbols that are currently
3228 undefined or common. */
3230 || (h->type != bfd_link_hash_undefined
3231 && h->type != bfd_link_hash_common))
3233 if (type == (N_INDR | N_EXT))
3238 if (type == (N_TEXT | N_EXT)
3239 || type == (N_DATA | N_EXT)
3240 || type == (N_BSS | N_EXT)
3241 || type == (N_ABS | N_EXT)
3242 || type == (N_INDR | N_EXT))
3244 /* This object file defines this symbol. We must link it
3245 in. This is true regardless of whether the current
3246 definition of the symbol is undefined or common.
3248 If the current definition is common, we have a case in
3249 which we have already seen an object file including:
3251 and this object file from the archive includes:
3253 In such a case, whether to include this object is target
3254 dependant for backward compatibility.
3256 FIXME: The SunOS 4.1.3 linker will pull in the archive
3257 element if the symbol is defined in the .data section,
3258 but not if it is defined in the .text section. That
3259 seems a bit crazy to me, and it has not been implemented
3260 yet. However, it might be correct. */
3261 if (h->type == bfd_link_hash_common)
3265 switch (info->common_skip_ar_aymbols)
3267 case bfd_link_common_skip_text:
3268 skip = (type == (N_TEXT | N_EXT));
3270 case bfd_link_common_skip_data:
3271 skip = (type == (N_DATA | N_EXT));
3274 case bfd_link_common_skip_all:
3283 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3289 if (type == (N_UNDF | N_EXT))
3293 value = GET_WORD (abfd, p->e_value);
3296 /* This symbol is common in the object from the archive
3298 if (h->type == bfd_link_hash_undefined)
3303 symbfd = h->u.undef.abfd;
3306 /* This symbol was created as undefined from
3307 outside BFD. We assume that we should link
3308 in the object file. This is done for the -u
3309 option in the linker. */
3310 if (! (*info->callbacks->add_archive_element) (info,
3317 /* Turn the current link symbol into a common
3318 symbol. It is already on the undefs list. */
3319 h->type = bfd_link_hash_common;
3320 h->u.c.p = bfd_hash_allocate (&info->hash->table,
3321 sizeof (struct bfd_link_hash_common_entry));
3322 if (h->u.c.p == NULL)
3325 h->u.c.size = value;
3327 /* FIXME: This isn't quite right. The maximum
3328 alignment of a common symbol should be set by the
3329 architecture of the output file, not of the input
3331 power = bfd_log2 (value);
3332 if (power > bfd_get_arch_info (abfd)->section_align_power)
3333 power = bfd_get_arch_info (abfd)->section_align_power;
3334 h->u.c.p->alignment_power = power;
3336 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3341 /* Adjust the size of the common symbol if
3343 if (value > h->u.c.size)
3344 h->u.c.size = value;
3354 /* This symbol is weak but defined. We must pull it in if
3355 the current link symbol is undefined, but we don't want
3356 it if the current link symbol is common. */
3357 if (h->type == bfd_link_hash_undefined)
3359 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3367 /* We do not need this object file. */
3370 /* Check a single archive element to see if we need to include it in
3371 the link. *PNEEDED is set according to whether this element is
3372 needed in the link or not. This is called from
3373 _bfd_generic_link_add_archive_symbols. */
3376 aout_link_check_archive_element (bfd *abfd,
3377 struct bfd_link_info *info,
3378 bfd_boolean *pneeded)
3380 if (! aout_get_external_symbols (abfd))
3383 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3388 if (! aout_link_add_symbols (abfd, info))
3392 if (! info->keep_memory || ! *pneeded)
3394 if (! aout_link_free_symbols (abfd))
3401 /* Given an a.out BFD, add symbols to the global hash table as
3405 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3407 switch (bfd_get_format (abfd))
3410 return aout_link_add_object_symbols (abfd, info);
3412 return _bfd_generic_link_add_archive_symbols
3413 (abfd, info, aout_link_check_archive_element);
3415 bfd_set_error (bfd_error_wrong_format);
3420 /* A hash table used for header files with N_BINCL entries. */
3422 struct aout_link_includes_table
3424 struct bfd_hash_table root;
3427 /* A linked list of totals that we have found for a particular header
3430 struct aout_link_includes_totals
3432 struct aout_link_includes_totals *next;
3436 /* An entry in the header file hash table. */
3438 struct aout_link_includes_entry
3440 struct bfd_hash_entry root;
3441 /* List of totals we have found for this file. */
3442 struct aout_link_includes_totals *totals;
3445 /* Look up an entry in an the header file hash table. */
3447 #define aout_link_includes_lookup(table, string, create, copy) \
3448 ((struct aout_link_includes_entry *) \
3449 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3451 /* During the final link step we need to pass around a bunch of
3452 information, so we do it in an instance of this structure. */
3454 struct aout_final_link_info
3456 /* General link information. */
3457 struct bfd_link_info *info;
3460 /* Reloc file positions. */
3461 file_ptr treloff, dreloff;
3462 /* File position of symbols. */
3465 struct bfd_strtab_hash *strtab;
3466 /* Header file hash table. */
3467 struct aout_link_includes_table includes;
3468 /* A buffer large enough to hold the contents of any section. */
3470 /* A buffer large enough to hold the relocs of any section. */
3472 /* A buffer large enough to hold the symbol map of any input BFD. */
3474 /* A buffer large enough to hold output symbols of any input BFD. */
3475 struct external_nlist *output_syms;
3478 /* The function to create a new entry in the header file hash table. */
3480 static struct bfd_hash_entry *
3481 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3482 struct bfd_hash_table *table,
3485 struct aout_link_includes_entry *ret =
3486 (struct aout_link_includes_entry *) entry;
3488 /* Allocate the structure if it has not already been allocated by a
3491 ret = bfd_hash_allocate (table, sizeof (* ret));
3495 /* Call the allocation method of the superclass. */
3496 ret = ((struct aout_link_includes_entry *)
3497 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3500 /* Set local fields. */
3504 return (struct bfd_hash_entry *) ret;
3507 /* Write out a symbol that was not associated with an a.out input
3511 aout_link_write_other_symbol (struct aout_link_hash_entry *h, void * data)
3513 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
3517 struct external_nlist outsym;
3521 if (h->root.type == bfd_link_hash_warning)
3523 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3524 if (h->root.type == bfd_link_hash_new)
3528 output_bfd = finfo->output_bfd;
3530 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3532 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3533 (output_bfd, finfo->info, h)))
3535 /* FIXME: No way to handle errors. */
3545 /* An indx of -2 means the symbol must be written. */
3547 && (finfo->info->strip == strip_all
3548 || (finfo->info->strip == strip_some
3549 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
3550 FALSE, FALSE) == NULL)))
3553 switch (h->root.type)
3556 case bfd_link_hash_warning:
3558 /* Avoid variable not initialized warnings. */
3560 case bfd_link_hash_new:
3561 /* This can happen for set symbols when sets are not being
3564 case bfd_link_hash_undefined:
3565 type = N_UNDF | N_EXT;
3568 case bfd_link_hash_defined:
3569 case bfd_link_hash_defweak:
3573 sec = h->root.u.def.section->output_section;
3574 BFD_ASSERT (bfd_is_abs_section (sec)
3575 || sec->owner == output_bfd);
3576 if (sec == obj_textsec (output_bfd))
3577 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3578 else if (sec == obj_datasec (output_bfd))
3579 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3580 else if (sec == obj_bsssec (output_bfd))
3581 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3583 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3585 val = (h->root.u.def.value
3587 + h->root.u.def.section->output_offset);
3590 case bfd_link_hash_common:
3591 type = N_UNDF | N_EXT;
3592 val = h->root.u.c.size;
3594 case bfd_link_hash_undefweak:
3597 case bfd_link_hash_indirect:
3598 /* We ignore these symbols, since the indirected symbol is
3599 already in the hash table. */
3603 H_PUT_8 (output_bfd, type, outsym.e_type);
3604 H_PUT_8 (output_bfd, 0, outsym.e_other);
3605 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3606 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
3608 if (indx == - (bfd_size_type) 1)
3609 /* FIXME: No way to handle errors. */
3612 PUT_WORD (output_bfd, indx, outsym.e_strx);
3613 PUT_WORD (output_bfd, val, outsym.e_value);
3615 amt = EXTERNAL_NLIST_SIZE;
3616 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
3617 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3618 /* FIXME: No way to handle errors. */
3621 finfo->symoff += EXTERNAL_NLIST_SIZE;
3622 h->indx = obj_aout_external_sym_count (output_bfd);
3623 ++obj_aout_external_sym_count (output_bfd);
3628 /* Handle a link order which is supposed to generate a reloc. */
3631 aout_link_reloc_link_order (struct aout_final_link_info *finfo,
3633 struct bfd_link_order *p)
3635 struct bfd_link_order_reloc *pr;
3638 reloc_howto_type *howto;
3639 file_ptr *reloff_ptr = NULL;
3640 struct reloc_std_external srel;
3641 struct reloc_ext_external erel;
3647 if (p->type == bfd_section_reloc_link_order)
3650 if (bfd_is_abs_section (pr->u.section))
3651 r_index = N_ABS | N_EXT;
3654 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
3655 r_index = pr->u.section->target_index;
3660 struct aout_link_hash_entry *h;
3662 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3664 h = ((struct aout_link_hash_entry *)
3665 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
3666 pr->u.name, FALSE, FALSE, TRUE));
3672 /* We decided to strip this symbol, but it turns out that we
3673 can't. Note that we lose the other and desc information
3674 here. I don't think that will ever matter for a global
3678 if (! aout_link_write_other_symbol (h, (void *) finfo))
3684 if (! ((*finfo->info->callbacks->unattached_reloc)
3685 (finfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0)))
3691 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
3694 bfd_set_error (bfd_error_bad_value);
3698 if (o == obj_textsec (finfo->output_bfd))
3699 reloff_ptr = &finfo->treloff;
3700 else if (o == obj_datasec (finfo->output_bfd))
3701 reloff_ptr = &finfo->dreloff;
3705 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
3708 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto,
3718 r_pcrel = (int) howto->pc_relative;
3719 r_baserel = (howto->type & 8) != 0;
3720 r_jmptable = (howto->type & 16) != 0;
3721 r_relative = (howto->type & 32) != 0;
3722 r_length = howto->size;
3724 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
3725 if (bfd_header_big_endian (finfo->output_bfd))
3727 srel.r_index[0] = r_index >> 16;
3728 srel.r_index[1] = r_index >> 8;
3729 srel.r_index[2] = r_index;
3731 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3732 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3733 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3734 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3735 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3736 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3740 srel.r_index[2] = r_index >> 16;
3741 srel.r_index[1] = r_index >> 8;
3742 srel.r_index[0] = r_index;
3744 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3745 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3746 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3747 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3748 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3749 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3753 rel_ptr = (void *) &srel;
3755 /* We have to write the addend into the object file, since
3756 standard a.out relocs are in place. It would be more
3757 reliable if we had the current contents of the file here,
3758 rather than assuming zeroes, but we can't read the file since
3759 it was opened using bfd_openw. */
3760 if (pr->addend != 0)
3763 bfd_reloc_status_type r;
3767 size = bfd_get_reloc_size (howto);
3768 buf = bfd_zmalloc (size);
3771 r = MY_relocate_contents (howto, finfo->output_bfd,
3772 (bfd_vma) pr->addend, buf);
3778 case bfd_reloc_outofrange:
3780 case bfd_reloc_overflow:
3781 if (! ((*finfo->info->callbacks->reloc_overflow)
3783 (p->type == bfd_section_reloc_link_order
3784 ? bfd_section_name (finfo->output_bfd,
3787 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0)))
3794 ok = bfd_set_section_contents (finfo->output_bfd, o, (void *) buf,
3795 (file_ptr) p->offset, size);
3803 #ifdef MY_put_ext_reloc
3804 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
3805 howto, &erel, pr->addend);
3807 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
3809 if (bfd_header_big_endian (finfo->output_bfd))
3811 erel.r_index[0] = r_index >> 16;
3812 erel.r_index[1] = r_index >> 8;
3813 erel.r_index[2] = r_index;
3815 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3816 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3820 erel.r_index[2] = r_index >> 16;
3821 erel.r_index[1] = r_index >> 8;
3822 erel.r_index[0] = r_index;
3824 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3825 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3828 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3829 #endif /* MY_put_ext_reloc */
3831 rel_ptr = (void *) &erel;
3834 amt = obj_reloc_entry_size (finfo->output_bfd);
3835 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3836 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt)
3839 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
3841 /* Assert that the relocs have not run into the symbols, and that n
3842 the text relocs have not run into the data relocs. */
3843 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
3844 && (reloff_ptr != &finfo->treloff
3846 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
3851 /* Get the section corresponding to a reloc index. */
3853 static INLINE asection *
3854 aout_reloc_index_to_section (bfd *abfd, int indx)
3856 switch (indx & N_TYPE)
3858 case N_TEXT: return obj_textsec (abfd);
3859 case N_DATA: return obj_datasec (abfd);
3860 case N_BSS: return obj_bsssec (abfd);
3862 case N_UNDF: return bfd_abs_section_ptr;
3868 /* Relocate an a.out section using standard a.out relocs. */
3871 aout_link_input_section_std (struct aout_final_link_info *finfo,
3873 asection *input_section,
3874 struct reloc_std_external *relocs,
3875 bfd_size_type rel_size,
3878 bfd_boolean (*check_dynamic_reloc)
3879 (struct bfd_link_info *, bfd *, asection *,
3880 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3883 bfd_boolean relocatable;
3884 struct external_nlist *syms;
3886 struct aout_link_hash_entry **sym_hashes;
3888 bfd_size_type reloc_count;
3889 struct reloc_std_external *rel;
3890 struct reloc_std_external *rel_end;
3892 output_bfd = finfo->output_bfd;
3893 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3895 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3896 BFD_ASSERT (input_bfd->xvec->header_byteorder
3897 == output_bfd->xvec->header_byteorder);
3899 relocatable = finfo->info->relocatable;
3900 syms = obj_aout_external_syms (input_bfd);
3901 strings = obj_aout_external_strings (input_bfd);
3902 sym_hashes = obj_aout_sym_hashes (input_bfd);
3903 symbol_map = finfo->symbol_map;
3905 reloc_count = rel_size / RELOC_STD_SIZE;
3907 rel_end = rel + reloc_count;
3908 for (; rel < rel_end; rel++)
3915 reloc_howto_type *howto;
3916 struct aout_link_hash_entry *h = NULL;
3918 bfd_reloc_status_type r;
3920 r_addr = GET_SWORD (input_bfd, rel->r_address);
3922 #ifdef MY_reloc_howto
3923 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
3929 unsigned int howto_idx;
3931 if (bfd_header_big_endian (input_bfd))
3933 r_index = (((unsigned int) rel->r_index[0] << 16)
3934 | ((unsigned int) rel->r_index[1] << 8)
3936 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
3937 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
3938 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
3939 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
3940 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
3941 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
3942 >> RELOC_STD_BITS_LENGTH_SH_BIG);
3946 r_index = (((unsigned int) rel->r_index[2] << 16)
3947 | ((unsigned int) rel->r_index[1] << 8)
3949 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
3950 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
3951 r_baserel = (0 != (rel->r_type[0]
3952 & RELOC_STD_BITS_BASEREL_LITTLE));
3953 r_jmptable= (0 != (rel->r_type[0]
3954 & RELOC_STD_BITS_JMPTABLE_LITTLE));
3955 r_relative= (0 != (rel->r_type[0]
3956 & RELOC_STD_BITS_RELATIVE_LITTLE));
3957 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
3958 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
3961 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
3962 + 16 * r_jmptable + 32 * r_relative);
3963 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
3964 howto = howto_table_std + howto_idx;
3970 /* We are generating a relocatable output file, and must
3971 modify the reloc accordingly. */
3974 /* If we know the symbol this relocation is against,
3975 convert it into a relocation against a section. This
3976 is what the native linker does. */
3977 h = sym_hashes[r_index];
3979 && (h->root.type == bfd_link_hash_defined
3980 || h->root.type == bfd_link_hash_defweak))
3982 asection *output_section;
3984 /* Change the r_extern value. */
3985 if (bfd_header_big_endian (output_bfd))
3986 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
3988 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
3990 /* Compute a new r_index. */
3991 output_section = h->root.u.def.section->output_section;
3992 if (output_section == obj_textsec (output_bfd))
3994 else if (output_section == obj_datasec (output_bfd))
3996 else if (output_section == obj_bsssec (output_bfd))
4001 /* Add the symbol value and the section VMA to the
4002 addend stored in the contents. */
4003 relocation = (h->root.u.def.value
4004 + output_section->vma
4005 + h->root.u.def.section->output_offset);
4009 /* We must change r_index according to the symbol
4011 r_index = symbol_map[r_index];
4017 /* We decided to strip this symbol, but it
4018 turns out that we can't. Note that we
4019 lose the other and desc information here.
4020 I don't think that will ever matter for a
4026 if (! aout_link_write_other_symbol (h,
4036 name = strings + GET_WORD (input_bfd,
4037 syms[r_index].e_strx);
4038 if (! ((*finfo->info->callbacks->unattached_reloc)
4039 (finfo->info, name, input_bfd, input_section,
4049 /* Write out the new r_index value. */
4050 if (bfd_header_big_endian (output_bfd))
4052 rel->r_index[0] = r_index >> 16;
4053 rel->r_index[1] = r_index >> 8;
4054 rel->r_index[2] = r_index;
4058 rel->r_index[2] = r_index >> 16;
4059 rel->r_index[1] = r_index >> 8;
4060 rel->r_index[0] = r_index;
4067 /* This is a relocation against a section. We must
4068 adjust by the amount that the section moved. */
4069 section = aout_reloc_index_to_section (input_bfd, r_index);
4070 relocation = (section->output_section->vma
4071 + section->output_offset
4075 /* Change the address of the relocation. */
4076 PUT_WORD (output_bfd,
4077 r_addr + input_section->output_offset,
4080 /* Adjust a PC relative relocation by removing the reference
4081 to the original address in the section and including the
4082 reference to the new address. */
4084 relocation -= (input_section->output_section->vma
4085 + input_section->output_offset
4086 - input_section->vma);
4088 #ifdef MY_relocatable_reloc
4089 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4092 if (relocation == 0)
4095 r = MY_relocate_contents (howto,
4096 input_bfd, relocation,
4103 /* We are generating an executable, and must do a full
4109 h = sym_hashes[r_index];
4112 && (h->root.type == bfd_link_hash_defined
4113 || h->root.type == bfd_link_hash_defweak))
4115 relocation = (h->root.u.def.value
4116 + h->root.u.def.section->output_section->vma
4117 + h->root.u.def.section->output_offset);
4120 && h->root.type == bfd_link_hash_undefweak)
4132 section = aout_reloc_index_to_section (input_bfd, r_index);
4133 relocation = (section->output_section->vma
4134 + section->output_offset
4137 relocation += input_section->vma;
4140 if (check_dynamic_reloc != NULL)
4144 if (! ((*check_dynamic_reloc)
4145 (finfo->info, input_bfd, input_section, h,
4146 (void *) rel, contents, &skip, &relocation)))
4152 /* Now warn if a global symbol is undefined. We could not
4153 do this earlier, because check_dynamic_reloc might want
4154 to skip this reloc. */
4155 if (hundef && ! finfo->info->shared && ! r_baserel)
4160 name = h->root.root.string;
4162 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4163 if (! ((*finfo->info->callbacks->undefined_symbol)
4164 (finfo->info, name, input_bfd, input_section,
4169 r = MY_final_link_relocate (howto,
4170 input_bfd, input_section,
4171 contents, r_addr, relocation,
4175 if (r != bfd_reloc_ok)
4180 case bfd_reloc_outofrange:
4182 case bfd_reloc_overflow:
4189 name = strings + GET_WORD (input_bfd,
4190 syms[r_index].e_strx);
4195 s = aout_reloc_index_to_section (input_bfd, r_index);
4196 name = bfd_section_name (input_bfd, s);
4198 if (! ((*finfo->info->callbacks->reloc_overflow)
4199 (finfo->info, (h ? &h->root : NULL), name,
4200 howto->name, (bfd_vma) 0, input_bfd,
4201 input_section, r_addr)))
4212 /* Relocate an a.out section using extended a.out relocs. */
4215 aout_link_input_section_ext (struct aout_final_link_info *finfo,
4217 asection *input_section,
4218 struct reloc_ext_external *relocs,
4219 bfd_size_type rel_size,
4222 bfd_boolean (*check_dynamic_reloc)
4223 (struct bfd_link_info *, bfd *, asection *,
4224 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4227 bfd_boolean relocatable;
4228 struct external_nlist *syms;
4230 struct aout_link_hash_entry **sym_hashes;
4232 bfd_size_type reloc_count;
4233 struct reloc_ext_external *rel;
4234 struct reloc_ext_external *rel_end;
4236 output_bfd = finfo->output_bfd;
4237 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4239 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4240 BFD_ASSERT (input_bfd->xvec->header_byteorder
4241 == output_bfd->xvec->header_byteorder);
4243 relocatable = finfo->info->relocatable;
4244 syms = obj_aout_external_syms (input_bfd);
4245 strings = obj_aout_external_strings (input_bfd);
4246 sym_hashes = obj_aout_sym_hashes (input_bfd);
4247 symbol_map = finfo->symbol_map;
4249 reloc_count = rel_size / RELOC_EXT_SIZE;
4251 rel_end = rel + reloc_count;
4252 for (; rel < rel_end; rel++)
4257 unsigned int r_type;
4259 struct aout_link_hash_entry *h = NULL;
4260 asection *r_section = NULL;
4263 r_addr = GET_SWORD (input_bfd, rel->r_address);
4265 if (bfd_header_big_endian (input_bfd))
4267 r_index = (((unsigned int) rel->r_index[0] << 16)
4268 | ((unsigned int) rel->r_index[1] << 8)
4270 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4271 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4272 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4276 r_index = (((unsigned int) rel->r_index[2] << 16)
4277 | ((unsigned int) rel->r_index[1] << 8)
4279 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4280 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4281 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4284 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4286 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
4290 /* We are generating a relocatable output file, and must
4291 modify the reloc accordingly. */
4293 || r_type == (unsigned int) RELOC_BASE10
4294 || r_type == (unsigned int) RELOC_BASE13
4295 || r_type == (unsigned int) RELOC_BASE22)
4297 /* If we know the symbol this relocation is against,
4298 convert it into a relocation against a section. This
4299 is what the native linker does. */
4300 if (r_type == (unsigned int) RELOC_BASE10
4301 || r_type == (unsigned int) RELOC_BASE13
4302 || r_type == (unsigned int) RELOC_BASE22)
4305 h = sym_hashes[r_index];
4307 && (h->root.type == bfd_link_hash_defined
4308 || h->root.type == bfd_link_hash_defweak))
4310 asection *output_section;
4312 /* Change the r_extern value. */
4313 if (bfd_header_big_endian (output_bfd))
4314 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4316 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4318 /* Compute a new r_index. */
4319 output_section = h->root.u.def.section->output_section;
4320 if (output_section == obj_textsec (output_bfd))
4322 else if (output_section == obj_datasec (output_bfd))
4324 else if (output_section == obj_bsssec (output_bfd))
4329 /* Add the symbol value and the section VMA to the
4331 relocation = (h->root.u.def.value
4332 + output_section->vma
4333 + h->root.u.def.section->output_offset);
4335 /* Now RELOCATION is the VMA of the final
4336 destination. If this is a PC relative reloc,
4337 then ADDEND is the negative of the source VMA.
4338 We want to set ADDEND to the difference between
4339 the destination VMA and the source VMA, which
4340 means we must adjust RELOCATION by the change in
4341 the source VMA. This is done below. */
4345 /* We must change r_index according to the symbol
4347 r_index = symbol_map[r_index];
4353 /* We decided to strip this symbol, but it
4354 turns out that we can't. Note that we
4355 lose the other and desc information here.
4356 I don't think that will ever matter for a
4362 if (! aout_link_write_other_symbol (h,
4372 name = strings + GET_WORD (input_bfd,
4373 syms[r_index].e_strx);
4374 if (! ((*finfo->info->callbacks->unattached_reloc)
4375 (finfo->info, name, input_bfd, input_section,
4384 /* If this is a PC relative reloc, then the addend
4385 is the negative of the source VMA. We must
4386 adjust it by the change in the source VMA. This
4390 /* Write out the new r_index value. */
4391 if (bfd_header_big_endian (output_bfd))
4393 rel->r_index[0] = r_index >> 16;
4394 rel->r_index[1] = r_index >> 8;
4395 rel->r_index[2] = r_index;
4399 rel->r_index[2] = r_index >> 16;
4400 rel->r_index[1] = r_index >> 8;
4401 rel->r_index[0] = r_index;
4406 /* This is a relocation against a section. We must
4407 adjust by the amount that the section moved. */
4408 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4409 relocation = (r_section->output_section->vma
4410 + r_section->output_offset
4413 /* If this is a PC relative reloc, then the addend is
4414 the difference in VMA between the destination and the
4415 source. We have just adjusted for the change in VMA
4416 of the destination, so we must also adjust by the
4417 change in VMA of the source. This is done below. */
4420 /* As described above, we must always adjust a PC relative
4421 reloc by the change in VMA of the source. However, if
4422 pcrel_offset is set, then the addend does not include the
4423 location within the section, in which case we don't need
4424 to adjust anything. */
4425 if (howto_table_ext[r_type].pc_relative
4426 && ! howto_table_ext[r_type].pcrel_offset)
4427 relocation -= (input_section->output_section->vma
4428 + input_section->output_offset
4429 - input_section->vma);
4431 /* Change the addend if necessary. */
4432 if (relocation != 0)
4433 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4435 /* Change the address of the relocation. */
4436 PUT_WORD (output_bfd,
4437 r_addr + input_section->output_offset,
4443 bfd_reloc_status_type r;
4445 /* We are generating an executable, and must do a full
4451 h = sym_hashes[r_index];
4454 && (h->root.type == bfd_link_hash_defined
4455 || h->root.type == bfd_link_hash_defweak))
4457 relocation = (h->root.u.def.value
4458 + h->root.u.def.section->output_section->vma
4459 + h->root.u.def.section->output_offset);
4462 && h->root.type == bfd_link_hash_undefweak)
4470 else if (r_type == (unsigned int) RELOC_BASE10
4471 || r_type == (unsigned int) RELOC_BASE13
4472 || r_type == (unsigned int) RELOC_BASE22)
4474 struct external_nlist *sym;
4477 /* For base relative relocs, r_index is always an index
4478 into the symbol table, even if r_extern is 0. */
4479 sym = syms + r_index;
4480 type = H_GET_8 (input_bfd, sym->e_type);
4481 if ((type & N_TYPE) == N_TEXT
4483 r_section = obj_textsec (input_bfd);
4484 else if ((type & N_TYPE) == N_DATA
4486 r_section = obj_datasec (input_bfd);
4487 else if ((type & N_TYPE) == N_BSS
4489 r_section = obj_bsssec (input_bfd);
4490 else if ((type & N_TYPE) == N_ABS
4492 r_section = bfd_abs_section_ptr;
4495 relocation = (r_section->output_section->vma
4496 + r_section->output_offset
4497 + (GET_WORD (input_bfd, sym->e_value)
4502 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4504 /* If this is a PC relative reloc, then R_ADDEND is the
4505 difference between the two vmas, or
4506 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4508 old_dest_sec == section->vma
4510 old_src_sec == input_section->vma
4512 old_src_off == r_addr
4514 _bfd_final_link_relocate expects RELOCATION +
4515 R_ADDEND to be the VMA of the destination minus
4516 r_addr (the minus r_addr is because this relocation
4517 is not pcrel_offset, which is a bit confusing and
4518 should, perhaps, be changed), or
4521 new_dest_sec == output_section->vma + output_offset
4522 We arrange for this to happen by setting RELOCATION to
4523 new_dest_sec + old_src_sec - old_dest_sec
4525 If this is not a PC relative reloc, then R_ADDEND is
4526 simply the VMA of the destination, so we set
4527 RELOCATION to the change in the destination VMA, or
4528 new_dest_sec - old_dest_sec
4530 relocation = (r_section->output_section->vma
4531 + r_section->output_offset
4533 if (howto_table_ext[r_type].pc_relative)
4534 relocation += input_section->vma;
4537 if (check_dynamic_reloc != NULL)
4541 if (! ((*check_dynamic_reloc)
4542 (finfo->info, input_bfd, input_section, h,
4543 (void *) rel, contents, &skip, &relocation)))
4549 /* Now warn if a global symbol is undefined. We could not
4550 do this earlier, because check_dynamic_reloc might want
4551 to skip this reloc. */
4553 && ! finfo->info->shared
4554 && r_type != (unsigned int) RELOC_BASE10
4555 && r_type != (unsigned int) RELOC_BASE13
4556 && r_type != (unsigned int) RELOC_BASE22)
4561 name = h->root.root.string;
4563 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4564 if (! ((*finfo->info->callbacks->undefined_symbol)
4565 (finfo->info, name, input_bfd, input_section,
4570 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4571 r = MY_final_link_relocate (howto_table_ext + r_type,
4572 input_bfd, input_section,
4573 contents, r_addr, relocation,
4579 x = bfd_get_32 (input_bfd, contents + r_addr);
4580 x = x + relocation + r_addend;
4581 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4585 if (r != bfd_reloc_ok)
4590 case bfd_reloc_outofrange:
4592 case bfd_reloc_overflow:
4599 || r_type == (unsigned int) RELOC_BASE10
4600 || r_type == (unsigned int) RELOC_BASE13
4601 || r_type == (unsigned int) RELOC_BASE22)
4602 name = strings + GET_WORD (input_bfd,
4603 syms[r_index].e_strx);
4608 s = aout_reloc_index_to_section (input_bfd, r_index);
4609 name = bfd_section_name (input_bfd, s);
4611 if (! ((*finfo->info->callbacks->reloc_overflow)
4612 (finfo->info, (h ? &h->root : NULL), name,
4613 howto_table_ext[r_type].name,
4614 r_addend, input_bfd, input_section, r_addr)))
4626 /* Link an a.out section into the output file. */
4629 aout_link_input_section (struct aout_final_link_info *finfo,
4631 asection *input_section,
4632 file_ptr *reloff_ptr,
4633 bfd_size_type rel_size)
4635 bfd_size_type input_size;
4638 /* Get the section contents. */
4639 input_size = input_section->size;
4640 if (! bfd_get_section_contents (input_bfd, input_section,
4641 (void *) finfo->contents,
4642 (file_ptr) 0, input_size))
4645 /* Read in the relocs if we haven't already done it. */
4646 if (aout_section_data (input_section) != NULL
4647 && aout_section_data (input_section)->relocs != NULL)
4648 relocs = aout_section_data (input_section)->relocs;
4651 relocs = finfo->relocs;
4654 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4655 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4660 /* Relocate the section contents. */
4661 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4663 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4664 (struct reloc_std_external *) relocs,
4665 rel_size, finfo->contents))
4670 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4671 (struct reloc_ext_external *) relocs,
4672 rel_size, finfo->contents))
4676 /* Write out the section contents. */
4677 if (! bfd_set_section_contents (finfo->output_bfd,
4678 input_section->output_section,
4679 (void *) finfo->contents,
4680 (file_ptr) input_section->output_offset,
4684 /* If we are producing relocatable output, the relocs were
4685 modified, and we now write them out. */
4686 if (finfo->info->relocatable && rel_size > 0)
4688 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4690 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size)
4692 *reloff_ptr += rel_size;
4694 /* Assert that the relocs have not run into the symbols, and
4695 that if these are the text relocs they have not run into the
4697 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4698 && (reloff_ptr != &finfo->treloff
4700 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4706 /* Adjust and write out the symbols for an a.out file. Set the new
4707 symbol indices into a symbol_map. */
4710 aout_link_write_symbols (struct aout_final_link_info *finfo, bfd *input_bfd)
4713 bfd_size_type sym_count;
4715 enum bfd_link_strip strip;
4716 enum bfd_link_discard discard;
4717 struct external_nlist *outsym;
4718 bfd_size_type strtab_index;
4719 struct external_nlist *sym;
4720 struct external_nlist *sym_end;
4721 struct aout_link_hash_entry **sym_hash;
4724 bfd_boolean skip_next;
4726 output_bfd = finfo->output_bfd;
4727 sym_count = obj_aout_external_sym_count (input_bfd);
4728 strings = obj_aout_external_strings (input_bfd);
4729 strip = finfo->info->strip;
4730 discard = finfo->info->discard;
4731 outsym = finfo->output_syms;
4733 /* First write out a symbol for this object file, unless we are
4734 discarding such symbols. */
4735 if (strip != strip_all
4736 && (strip != strip_some
4737 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4738 FALSE, FALSE) != NULL)
4739 && discard != discard_all)
4741 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4742 H_PUT_8 (output_bfd, 0, outsym->e_other);
4743 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4744 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4745 input_bfd->filename, FALSE);
4746 if (strtab_index == (bfd_size_type) -1)
4748 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4749 PUT_WORD (output_bfd,
4750 (bfd_get_section_vma (output_bfd,
4751 obj_textsec (input_bfd)->output_section)
4752 + obj_textsec (input_bfd)->output_offset),
4754 ++obj_aout_external_sym_count (output_bfd);
4760 sym = obj_aout_external_syms (input_bfd);
4761 sym_end = sym + sym_count;
4762 sym_hash = obj_aout_sym_hashes (input_bfd);
4763 symbol_map = finfo->symbol_map;
4764 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4765 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4769 struct aout_link_hash_entry *h;
4775 /* We set *symbol_map to 0 above for all symbols. If it has
4776 already been set to -1 for this symbol, it means that we are
4777 discarding it because it appears in a duplicate header file.
4778 See the N_BINCL code below. */
4779 if (*symbol_map == -1)
4782 /* Initialize *symbol_map to -1, which means that the symbol was
4783 not copied into the output file. We will change it later if
4784 we do copy the symbol over. */
4787 type = H_GET_8 (input_bfd, sym->e_type);
4788 name = strings + GET_WORD (input_bfd, sym->e_strx);
4794 /* Pass this symbol through. It is the target of an
4795 indirect or warning symbol. */
4796 val = GET_WORD (input_bfd, sym->e_value);
4801 /* Skip this symbol, which is the target of an indirect
4802 symbol that we have changed to no longer be an indirect
4809 struct aout_link_hash_entry *hresolve;
4811 /* We have saved the hash table entry for this symbol, if
4812 there is one. Note that we could just look it up again
4813 in the hash table, provided we first check that it is an
4817 /* Use the name from the hash table, in case the symbol was
4820 && h->root.type != bfd_link_hash_warning)
4821 name = h->root.root.string;
4823 /* If this is an indirect or warning symbol, then change
4824 hresolve to the base symbol. We also change *sym_hash so
4825 that the relocation routines relocate against the real
4828 if (h != (struct aout_link_hash_entry *) NULL
4829 && (h->root.type == bfd_link_hash_indirect
4830 || h->root.type == bfd_link_hash_warning))
4832 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4833 while (hresolve->root.type == bfd_link_hash_indirect
4834 || hresolve->root.type == bfd_link_hash_warning)
4835 hresolve = ((struct aout_link_hash_entry *)
4836 hresolve->root.u.i.link);
4837 *sym_hash = hresolve;
4840 /* If the symbol has already been written out, skip it. */
4844 if ((type & N_TYPE) == N_INDR
4845 || type == N_WARNING)
4847 *symbol_map = h->indx;
4851 /* See if we are stripping this symbol. */
4857 case strip_debugger:
4858 if ((type & N_STAB) != 0)
4862 if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE)
4877 /* Get the value of the symbol. */
4878 if ((type & N_TYPE) == N_TEXT
4880 symsec = obj_textsec (input_bfd);
4881 else if ((type & N_TYPE) == N_DATA
4883 symsec = obj_datasec (input_bfd);
4884 else if ((type & N_TYPE) == N_BSS
4886 symsec = obj_bsssec (input_bfd);
4887 else if ((type & N_TYPE) == N_ABS
4889 symsec = bfd_abs_section_ptr;
4890 else if (((type & N_TYPE) == N_INDR
4891 && (hresolve == NULL
4892 || (hresolve->root.type != bfd_link_hash_defined
4893 && hresolve->root.type != bfd_link_hash_defweak
4894 && hresolve->root.type != bfd_link_hash_common)))
4895 || type == N_WARNING)
4897 /* Pass the next symbol through unchanged. The
4898 condition above for indirect symbols is so that if
4899 the indirect symbol was defined, we output it with
4900 the correct definition so the debugger will
4903 val = GET_WORD (input_bfd, sym->e_value);
4906 else if ((type & N_STAB) != 0)
4908 val = GET_WORD (input_bfd, sym->e_value);
4913 /* If we get here with an indirect symbol, it means that
4914 we are outputting it with a real definition. In such
4915 a case we do not want to output the next symbol,
4916 which is the target of the indirection. */
4917 if ((type & N_TYPE) == N_INDR)
4922 /* We need to get the value from the hash table. We use
4923 hresolve so that if we have defined an indirect
4924 symbol we output the final definition. */
4927 switch (type & N_TYPE)
4930 symsec = obj_textsec (input_bfd);
4933 symsec = obj_datasec (input_bfd);
4936 symsec = obj_bsssec (input_bfd);
4939 symsec = bfd_abs_section_ptr;
4946 else if (hresolve->root.type == bfd_link_hash_defined
4947 || hresolve->root.type == bfd_link_hash_defweak)
4949 asection *input_section;
4950 asection *output_section;
4952 /* This case usually means a common symbol which was
4953 turned into a defined symbol. */
4954 input_section = hresolve->root.u.def.section;
4955 output_section = input_section->output_section;
4956 BFD_ASSERT (bfd_is_abs_section (output_section)
4957 || output_section->owner == output_bfd);
4958 val = (hresolve->root.u.def.value
4959 + bfd_get_section_vma (output_bfd, output_section)
4960 + input_section->output_offset);
4962 /* Get the correct type based on the section. If
4963 this is a constructed set, force it to be
4964 globally visible. */
4973 if (output_section == obj_textsec (output_bfd))
4974 type |= (hresolve->root.type == bfd_link_hash_defined
4977 else if (output_section == obj_datasec (output_bfd))
4978 type |= (hresolve->root.type == bfd_link_hash_defined
4981 else if (output_section == obj_bsssec (output_bfd))
4982 type |= (hresolve->root.type == bfd_link_hash_defined
4986 type |= (hresolve->root.type == bfd_link_hash_defined
4990 else if (hresolve->root.type == bfd_link_hash_common)
4991 val = hresolve->root.u.c.size;
4992 else if (hresolve->root.type == bfd_link_hash_undefweak)
5001 val = (symsec->output_section->vma
5002 + symsec->output_offset
5003 + (GET_WORD (input_bfd, sym->e_value)
5006 /* If this is a global symbol set the written flag, and if
5007 it is a local symbol see if we should discard it. */
5011 h->indx = obj_aout_external_sym_count (output_bfd);
5013 else if ((type & N_TYPE) != N_SETT
5014 && (type & N_TYPE) != N_SETD
5015 && (type & N_TYPE) != N_SETB
5016 && (type & N_TYPE) != N_SETA)
5021 case discard_sec_merge:
5024 if ((type & N_STAB) == 0
5025 && bfd_is_local_label_name (input_bfd, name))
5039 /* An N_BINCL symbol indicates the start of the stabs
5040 entries for a header file. We need to scan ahead to the
5041 next N_EINCL symbol, ignoring nesting, adding up all the
5042 characters in the symbol names, not including the file
5043 numbers in types (the first number after an open
5045 if (type == (int) N_BINCL)
5047 struct external_nlist *incl_sym;
5049 struct aout_link_includes_entry *incl_entry;
5050 struct aout_link_includes_totals *t;
5054 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5058 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5059 if (incl_type == (int) N_EINCL)
5065 else if (incl_type == (int) N_BINCL)
5071 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5072 for (; *s != '\0'; s++)
5077 /* Skip the file number. */
5079 while (ISDIGIT (*s))
5087 /* If we have already included a header file with the
5088 same value, then replace this one with an N_EXCL
5090 copy = (bfd_boolean) (! finfo->info->keep_memory);
5091 incl_entry = aout_link_includes_lookup (&finfo->includes,
5093 if (incl_entry == NULL)
5095 for (t = incl_entry->totals; t != NULL; t = t->next)
5096 if (t->total == val)
5100 /* This is the first time we have seen this header
5101 file with this set of stabs strings. */
5102 t = bfd_hash_allocate (&finfo->includes.root,
5107 t->next = incl_entry->totals;
5108 incl_entry->totals = t;
5114 /* This is a duplicate header file. We must change
5115 it to be an N_EXCL entry, and mark all the
5116 included symbols to prevent outputting them. */
5117 type = (int) N_EXCL;
5120 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5122 incl_sym++, incl_map++)
5126 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5127 if (incl_type == (int) N_EINCL)
5136 else if (incl_type == (int) N_BINCL)
5145 /* Copy this symbol into the list of symbols we are going to
5147 H_PUT_8 (output_bfd, type, outsym->e_type);
5148 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5149 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5151 if (! finfo->info->keep_memory)
5153 /* name points into a string table which we are going to
5154 free. If there is a hash table entry, use that string.
5155 Otherwise, copy name into memory. */
5157 name = h->root.root.string;
5161 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
5163 if (strtab_index == (bfd_size_type) -1)
5165 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5166 PUT_WORD (output_bfd, val, outsym->e_value);
5167 *symbol_map = obj_aout_external_sym_count (output_bfd);
5168 ++obj_aout_external_sym_count (output_bfd);
5172 /* Write out the output symbols we have just constructed. */
5173 if (outsym > finfo->output_syms)
5175 bfd_size_type outsym_size;
5177 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
5179 outsym_size = outsym - finfo->output_syms;
5180 outsym_size *= EXTERNAL_NLIST_SIZE;
5181 if (bfd_bwrite ((void *) finfo->output_syms, outsym_size, output_bfd)
5184 finfo->symoff += outsym_size;
5190 /* Link an a.out input BFD into the output file. */
5193 aout_link_input_bfd (struct aout_final_link_info *finfo, bfd *input_bfd)
5195 bfd_size_type sym_count;
5197 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5199 /* If this is a dynamic object, it may need special handling. */
5200 if ((input_bfd->flags & DYNAMIC) != 0
5201 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5202 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5203 (finfo->info, input_bfd));
5205 /* Get the symbols. We probably have them already, unless
5206 finfo->info->keep_memory is FALSE. */
5207 if (! aout_get_external_symbols (input_bfd))
5210 sym_count = obj_aout_external_sym_count (input_bfd);
5212 /* Write out the symbols and get a map of the new indices. The map
5213 is placed into finfo->symbol_map. */
5214 if (! aout_link_write_symbols (finfo, input_bfd))
5217 /* Relocate and write out the sections. These functions use the
5218 symbol map created by aout_link_write_symbols. The linker_mark
5219 field will be set if these sections are to be included in the
5220 link, which will normally be the case. */
5221 if (obj_textsec (input_bfd)->linker_mark)
5223 if (! aout_link_input_section (finfo, input_bfd,
5224 obj_textsec (input_bfd),
5226 exec_hdr (input_bfd)->a_trsize))
5229 if (obj_datasec (input_bfd)->linker_mark)
5231 if (! aout_link_input_section (finfo, input_bfd,
5232 obj_datasec (input_bfd),
5234 exec_hdr (input_bfd)->a_drsize))
5238 /* If we are not keeping memory, we don't need the symbols any
5239 longer. We still need them if we are keeping memory, because the
5240 strings in the hash table point into them. */
5241 if (! finfo->info->keep_memory)
5243 if (! aout_link_free_symbols (input_bfd))
5250 /* Do the final link step. This is called on the output BFD. The
5251 INFO structure should point to a list of BFDs linked through the
5252 link_next field which can be used to find each BFD which takes part
5253 in the output. Also, each section in ABFD should point to a list
5254 of bfd_link_order structures which list all the input sections for
5255 the output section. */
5258 NAME (aout, final_link) (bfd *abfd,
5259 struct bfd_link_info *info,
5260 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5262 struct aout_final_link_info aout_info;
5263 bfd_boolean includes_hash_initialized = FALSE;
5265 bfd_size_type trsize, drsize;
5266 bfd_size_type max_contents_size;
5267 bfd_size_type max_relocs_size;
5268 bfd_size_type max_sym_count;
5269 bfd_size_type text_size;
5271 struct bfd_link_order *p;
5273 bfd_boolean have_link_order_relocs;
5276 abfd->flags |= DYNAMIC;
5278 aout_info.info = info;
5279 aout_info.output_bfd = abfd;
5280 aout_info.contents = NULL;
5281 aout_info.relocs = NULL;
5282 aout_info.symbol_map = NULL;
5283 aout_info.output_syms = NULL;
5285 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5286 aout_link_includes_newfunc,
5287 sizeof (struct aout_link_includes_entry),
5290 includes_hash_initialized = TRUE;
5292 /* Figure out the largest section size. Also, if generating
5293 relocatable output, count the relocs. */
5296 max_contents_size = 0;
5297 max_relocs_size = 0;
5299 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5303 if (info->relocatable)
5305 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5307 trsize += exec_hdr (sub)->a_trsize;
5308 drsize += exec_hdr (sub)->a_drsize;
5312 /* FIXME: We need to identify the .text and .data sections
5313 and call get_reloc_upper_bound and canonicalize_reloc to
5314 work out the number of relocs needed, and then multiply
5315 by the reloc size. */
5316 (*_bfd_error_handler)
5317 (_("%s: relocatable link from %s to %s not supported"),
5318 bfd_get_filename (abfd),
5319 sub->xvec->name, abfd->xvec->name);
5320 bfd_set_error (bfd_error_invalid_operation);
5325 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5327 sz = obj_textsec (sub)->size;
5328 if (sz > max_contents_size)
5329 max_contents_size = sz;
5330 sz = obj_datasec (sub)->size;
5331 if (sz > max_contents_size)
5332 max_contents_size = sz;
5334 sz = exec_hdr (sub)->a_trsize;
5335 if (sz > max_relocs_size)
5336 max_relocs_size = sz;
5337 sz = exec_hdr (sub)->a_drsize;
5338 if (sz > max_relocs_size)
5339 max_relocs_size = sz;
5341 sz = obj_aout_external_sym_count (sub);
5342 if (sz > max_sym_count)
5347 if (info->relocatable)
5349 if (obj_textsec (abfd) != NULL)
5350 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5351 ->map_head.link_order)
5352 * obj_reloc_entry_size (abfd));
5353 if (obj_datasec (abfd) != NULL)
5354 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5355 ->map_head.link_order)
5356 * obj_reloc_entry_size (abfd));
5359 exec_hdr (abfd)->a_trsize = trsize;
5360 exec_hdr (abfd)->a_drsize = drsize;
5362 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5364 /* Adjust the section sizes and vmas according to the magic number.
5365 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5366 filepos for each section. */
5367 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
5370 /* The relocation and symbol file positions differ among a.out
5371 targets. We are passed a callback routine from the backend
5372 specific code to handle this.
5373 FIXME: At this point we do not know how much space the symbol
5374 table will require. This will not work for any (nonstandard)
5375 a.out target that needs to know the symbol table size before it
5376 can compute the relocation file positions. This may or may not
5377 be the case for the hp300hpux target, for example. */
5378 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5380 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5381 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5382 obj_sym_filepos (abfd) = aout_info.symoff;
5384 /* We keep a count of the symbols as we output them. */
5385 obj_aout_external_sym_count (abfd) = 0;
5387 /* We accumulate the string table as we write out the symbols. */
5388 aout_info.strtab = _bfd_stringtab_init ();
5389 if (aout_info.strtab == NULL)
5392 /* Allocate buffers to hold section contents and relocs. */
5393 aout_info.contents = bfd_malloc (max_contents_size);
5394 aout_info.relocs = bfd_malloc (max_relocs_size);
5395 aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *));
5396 aout_info.output_syms = bfd_malloc ((max_sym_count + 1)
5397 * sizeof (struct external_nlist));
5398 if ((aout_info.contents == NULL && max_contents_size != 0)
5399 || (aout_info.relocs == NULL && max_relocs_size != 0)
5400 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5401 || aout_info.output_syms == NULL)
5404 /* If we have a symbol named __DYNAMIC, force it out now. This is
5405 required by SunOS. Doing this here rather than in sunos.c is a
5406 hack, but it's easier than exporting everything which would be
5409 struct aout_link_hash_entry *h;
5411 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5412 FALSE, FALSE, FALSE);
5414 aout_link_write_other_symbol (h, &aout_info);
5417 /* The most time efficient way to do the link would be to read all
5418 the input object files into memory and then sort out the
5419 information into the output file. Unfortunately, that will
5420 probably use too much memory. Another method would be to step
5421 through everything that composes the text section and write it
5422 out, and then everything that composes the data section and write
5423 it out, and then write out the relocs, and then write out the
5424 symbols. Unfortunately, that requires reading stuff from each
5425 input file several times, and we will not be able to keep all the
5426 input files open simultaneously, and reopening them will be slow.
5428 What we do is basically process one input file at a time. We do
5429 everything we need to do with an input file once--copy over the
5430 section contents, handle the relocation information, and write
5431 out the symbols--and then we throw away the information we read
5432 from it. This approach requires a lot of lseeks of the output
5433 file, which is unfortunate but still faster than reopening a lot
5436 We use the output_has_begun field of the input BFDs to see
5437 whether we have already handled it. */
5438 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5439 sub->output_has_begun = FALSE;
5441 /* Mark all sections which are to be included in the link. This
5442 will normally be every section. We need to do this so that we
5443 can identify any sections which the linker has decided to not
5445 for (o = abfd->sections; o != NULL; o = o->next)
5447 for (p = o->map_head.link_order; p != NULL; p = p->next)
5448 if (p->type == bfd_indirect_link_order)
5449 p->u.indirect.section->linker_mark = TRUE;
5452 have_link_order_relocs = FALSE;
5453 for (o = abfd->sections; o != NULL; o = o->next)
5455 for (p = o->map_head.link_order;
5459 if (p->type == bfd_indirect_link_order
5460 && (bfd_get_flavour (p->u.indirect.section->owner)
5461 == bfd_target_aout_flavour))
5465 input_bfd = p->u.indirect.section->owner;
5466 if (! input_bfd->output_has_begun)
5468 if (! aout_link_input_bfd (&aout_info, input_bfd))
5470 input_bfd->output_has_begun = TRUE;
5473 else if (p->type == bfd_section_reloc_link_order
5474 || p->type == bfd_symbol_reloc_link_order)
5476 /* These are handled below. */
5477 have_link_order_relocs = TRUE;
5481 if (! _bfd_default_link_order (abfd, info, o, p))
5487 /* Write out any symbols that we have not already written out. */
5488 aout_link_hash_traverse (aout_hash_table (info),
5489 aout_link_write_other_symbol,
5490 (void *) &aout_info);
5492 /* Now handle any relocs we were asked to create by the linker.
5493 These did not come from any input file. We must do these after
5494 we have written out all the symbols, so that we know the symbol
5496 if (have_link_order_relocs)
5498 for (o = abfd->sections; o != NULL; o = o->next)
5500 for (p = o->map_head.link_order;
5504 if (p->type == bfd_section_reloc_link_order
5505 || p->type == bfd_symbol_reloc_link_order)
5507 if (! aout_link_reloc_link_order (&aout_info, o, p))
5514 if (aout_info.contents != NULL)
5516 free (aout_info.contents);
5517 aout_info.contents = NULL;
5519 if (aout_info.relocs != NULL)
5521 free (aout_info.relocs);
5522 aout_info.relocs = NULL;
5524 if (aout_info.symbol_map != NULL)
5526 free (aout_info.symbol_map);
5527 aout_info.symbol_map = NULL;
5529 if (aout_info.output_syms != NULL)
5531 free (aout_info.output_syms);
5532 aout_info.output_syms = NULL;
5534 if (includes_hash_initialized)
5536 bfd_hash_table_free (&aout_info.includes.root);
5537 includes_hash_initialized = FALSE;
5540 /* Finish up any dynamic linking we may be doing. */
5541 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5543 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5547 /* Update the header information. */
5548 abfd->symcount = obj_aout_external_sym_count (abfd);
5549 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5550 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5551 obj_textsec (abfd)->reloc_count =
5552 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5553 obj_datasec (abfd)->reloc_count =
5554 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5556 /* Write out the string table, unless there are no symbols. */
5557 if (abfd->symcount > 0)
5559 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
5560 || ! emit_stringtab (abfd, aout_info.strtab))
5563 else if (obj_textsec (abfd)->reloc_count == 0
5564 && obj_datasec (abfd)->reloc_count == 0)
5570 pos = obj_datasec (abfd)->filepos + exec_hdr (abfd)->a_data - 1;
5571 if (bfd_seek (abfd, pos, SEEK_SET) != 0
5572 || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1)
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);