1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
30 BFD supports a number of different flavours of a.out format,
31 though the major differences are only the sizes of the
32 structures on disk, and the shape of the relocation
35 The support is split into a basic support file @file{aoutx.h}
36 and other files which derive functions from the base. One
37 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
38 adds to the basic a.out functions support for sun3, sun4, 386
39 and 29k a.out files, to create a target jump vector for a
42 This information is further split out into more specific files
43 for each machine, including @file{sunos.c} for sun3 and sun4,
44 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
45 demonstration of a 64 bit a.out format.
47 The base file @file{aoutx.h} defines general mechanisms for
48 reading and writing records to and from disk and various
49 other methods which BFD requires. It is included by
50 @file{aout32.c} and @file{aout64.c} to form the names
51 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
53 As an example, this is what goes on to make the back end for a
54 sun4, from @file{aout32.c}:
56 | #define ARCH_SIZE 32
62 | aout_32_canonicalize_reloc
63 | aout_32_find_nearest_line
65 | aout_32_get_reloc_upper_bound
70 | #define TARGET_NAME "a.out-sunos-big"
71 | #define VECNAME sunos_big_vec
74 requires all the names from @file{aout32.c}, and produces the jump vector
78 The file @file{host-aout.c} is a special case. It is for a large set
79 of hosts that use ``more or less standard'' a.out files, and
80 for which cross-debugging is not interesting. It uses the
81 standard 32-bit a.out support routines, but determines the
82 file offsets and addresses of the text, data, and BSS
83 sections, the machine architecture and machine type, and the
84 entry point address, in a host-dependent manner. Once these
85 values have been determined, generic code is used to handle
88 When porting it to run on a new system, you must supply:
92 | HOST_MACHINE_ARCH (optional)
93 | HOST_MACHINE_MACHINE (optional)
94 | HOST_TEXT_START_ADDR
97 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
98 values, plus the structures and macros defined in @file{a.out.h} on
99 your host system, will produce a BFD target that will access
100 ordinary a.out files on your host. To configure a new machine
101 to use @file{host-aout.c}, specify:
103 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
104 | TDEPFILES= host-aout.o trad-core.o
106 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
108 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
109 configuration is selected. */
112 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
113 Doesn't matter what the setting of WP_TEXT is on output, but it'll
115 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
116 * Any BFD with both flags clear is OMAGIC.
117 (Just want to make these explicit, so the conditions tested in this
118 file make sense if you're more familiar with a.out than with BFD.) */
120 #define KEEPIT udata.i
124 #include "safe-ctype.h"
129 #include "aout/aout64.h"
130 #include "aout/stab_gnu.h"
138 The file @file{aoutx.h} provides for both the @emph{standard}
139 and @emph{extended} forms of a.out relocation records.
141 The standard records contain only an
142 address, a symbol index, and a type field. The extended records
143 (used on 29ks and sparcs) also have a full integer for an
146 #ifndef CTOR_TABLE_RELOC_HOWTO
147 #define CTOR_TABLE_RELOC_IDX 2
148 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
149 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
150 ? howto_table_ext : howto_table_std) \
151 + CTOR_TABLE_RELOC_IDX)
154 #ifndef MY_swap_std_reloc_in
155 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
158 #ifndef MY_swap_ext_reloc_in
159 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
162 #ifndef MY_swap_std_reloc_out
163 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
166 #ifndef MY_swap_ext_reloc_out
167 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
170 #ifndef MY_final_link_relocate
171 #define MY_final_link_relocate _bfd_final_link_relocate
174 #ifndef MY_relocate_contents
175 #define MY_relocate_contents _bfd_relocate_contents
178 #define howto_table_ext NAME (aout, ext_howto_table)
179 #define howto_table_std NAME (aout, std_howto_table)
181 reloc_howto_type howto_table_ext[] =
183 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
184 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE),
185 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE),
186 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE),
187 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE),
188 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE),
189 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE),
190 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE),
191 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE),
192 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE),
193 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE),
194 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE),
195 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE),
196 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE),
197 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE),
198 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE),
199 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE),
200 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE),
201 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE),
202 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE),
203 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE),
204 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE),
205 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE),
206 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE),
207 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE),
208 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
209 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
210 #define RELOC_SPARC_REV32 RELOC_WDISP19
211 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE),
214 /* Convert standard reloc records to "arelent" format (incl byte swap). */
216 reloc_howto_type howto_table_std[] =
218 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
219 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
220 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
221 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
222 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
223 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
224 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
225 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
226 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
227 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
228 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
229 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
235 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
251 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
259 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
262 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
265 NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
267 #define EXT(i, j) case i: return & howto_table_ext [j]
268 #define STD(i, j) case i: return & howto_table_std [j]
269 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
271 if (code == BFD_RELOC_CTOR)
272 switch (bfd_get_arch_info (abfd)->bits_per_address)
285 EXT (BFD_RELOC_8, 0);
286 EXT (BFD_RELOC_16, 1);
287 EXT (BFD_RELOC_32, 2);
288 EXT (BFD_RELOC_HI22, 8);
289 EXT (BFD_RELOC_LO10, 11);
290 EXT (BFD_RELOC_32_PCREL_S2, 6);
291 EXT (BFD_RELOC_SPARC_WDISP22, 7);
292 EXT (BFD_RELOC_SPARC13, 10);
293 EXT (BFD_RELOC_SPARC_GOT10, 14);
294 EXT (BFD_RELOC_SPARC_BASE13, 15);
295 EXT (BFD_RELOC_SPARC_GOT13, 15);
296 EXT (BFD_RELOC_SPARC_GOT22, 16);
297 EXT (BFD_RELOC_SPARC_PC10, 17);
298 EXT (BFD_RELOC_SPARC_PC22, 18);
299 EXT (BFD_RELOC_SPARC_WPLT30, 19);
300 EXT (BFD_RELOC_SPARC_REV32, 26);
308 STD (BFD_RELOC_8, 0);
309 STD (BFD_RELOC_16, 1);
310 STD (BFD_RELOC_32, 2);
311 STD (BFD_RELOC_8_PCREL, 4);
312 STD (BFD_RELOC_16_PCREL, 5);
313 STD (BFD_RELOC_32_PCREL, 6);
314 STD (BFD_RELOC_16_BASEREL, 9);
315 STD (BFD_RELOC_32_BASEREL, 10);
322 NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name)
324 unsigned int i, size;
325 reloc_howto_type *howto_table;
327 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE)
329 howto_table = howto_table_ext;
330 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]);
334 howto_table = howto_table_std;
335 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]);
338 for (i = 0; i < size; i++)
339 if (howto_table[i].name != NULL
340 && strcasecmp (howto_table[i].name, r_name) == 0)
341 return &howto_table[i];
348 Internal entry points
351 @file{aoutx.h} exports several routines for accessing the
352 contents of an a.out file, which are gathered and exported in
353 turn by various format specific files (eg sunos.c).
358 aout_@var{size}_swap_exec_header_in
361 void aout_@var{size}_swap_exec_header_in,
363 struct external_exec *bytes,
364 struct internal_exec *execp);
367 Swap the information in an executable header @var{raw_bytes} taken
368 from a raw byte stream memory image into the internal exec header
369 structure @var{execp}.
372 #ifndef NAME_swap_exec_header_in
374 NAME (aout, swap_exec_header_in) (bfd *abfd,
375 struct external_exec *bytes,
376 struct internal_exec *execp)
378 /* The internal_exec structure has some fields that are unused in this
379 configuration (IE for i960), so ensure that all such uninitialized
380 fields are zero'd out. There are places where two of these structs
381 are memcmp'd, and thus the contents do matter. */
382 memset ((void *) execp, 0, sizeof (struct internal_exec));
383 /* Now fill in fields in the execp, from the bytes in the raw data. */
384 execp->a_info = H_GET_32 (abfd, bytes->e_info);
385 execp->a_text = GET_WORD (abfd, bytes->e_text);
386 execp->a_data = GET_WORD (abfd, bytes->e_data);
387 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
388 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
389 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
390 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
391 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
393 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
398 aout_@var{size}_swap_exec_header_out
401 void aout_@var{size}_swap_exec_header_out
403 struct internal_exec *execp,
404 struct external_exec *raw_bytes);
407 Swap the information in an internal exec header structure
408 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
411 NAME (aout, swap_exec_header_out) (bfd *abfd,
412 struct internal_exec *execp,
413 struct external_exec *bytes)
415 /* Now fill in fields in the raw data, from the fields in the exec struct. */
416 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
417 PUT_WORD (abfd, execp->a_text , bytes->e_text);
418 PUT_WORD (abfd, execp->a_data , bytes->e_data);
419 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
420 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
421 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
422 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
423 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
426 /* Make all the section for an a.out file. */
429 NAME (aout, make_sections) (bfd *abfd)
431 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL)
433 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL)
435 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL)
442 aout_@var{size}_some_aout_object_p
445 const bfd_target *aout_@var{size}_some_aout_object_p
447 struct internal_exec *execp,
448 const bfd_target *(*callback_to_real_object_p) (bfd *));
451 Some a.out variant thinks that the file open in @var{abfd}
452 checking is an a.out file. Do some more checking, and set up
453 for access if it really is. Call back to the calling
454 environment's "finish up" function just before returning, to
455 handle any last-minute setup.
459 NAME (aout, some_aout_object_p) (bfd *abfd,
460 struct internal_exec *execp,
461 const bfd_target *(*callback_to_real_object_p) (bfd *))
463 struct aout_data_struct *rawptr, *oldrawptr;
464 const bfd_target *result;
465 bfd_size_type amt = sizeof (* rawptr);
467 rawptr = bfd_zalloc (abfd, amt);
471 oldrawptr = abfd->tdata.aout_data;
472 abfd->tdata.aout_data = rawptr;
474 /* Copy the contents of the old tdata struct.
475 In particular, we want the subformat, since for hpux it was set in
476 hp300hpux.c:swap_exec_header_in and will be used in
477 hp300hpux.c:callback. */
478 if (oldrawptr != NULL)
479 *abfd->tdata.aout_data = *oldrawptr;
481 abfd->tdata.aout_data->a.hdr = &rawptr->e;
482 /* Copy in the internal_exec struct. */
483 *(abfd->tdata.aout_data->a.hdr) = *execp;
484 execp = abfd->tdata.aout_data->a.hdr;
486 /* Set the file flags. */
487 abfd->flags = BFD_NO_FLAGS;
488 if (execp->a_drsize || execp->a_trsize)
489 abfd->flags |= HAS_RELOC;
490 /* Setting of EXEC_P has been deferred to the bottom of this function. */
492 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
493 if (N_DYNAMIC (*execp))
494 abfd->flags |= DYNAMIC;
496 if (N_MAGIC (*execp) == ZMAGIC)
498 abfd->flags |= D_PAGED | WP_TEXT;
499 adata (abfd).magic = z_magic;
501 else if (N_MAGIC (*execp) == QMAGIC)
503 abfd->flags |= D_PAGED | WP_TEXT;
504 adata (abfd).magic = z_magic;
505 adata (abfd).subformat = q_magic_format;
507 else if (N_MAGIC (*execp) == NMAGIC)
509 abfd->flags |= WP_TEXT;
510 adata (abfd).magic = n_magic;
512 else if (N_MAGIC (*execp) == OMAGIC
513 || N_MAGIC (*execp) == BMAGIC)
514 adata (abfd).magic = o_magic;
516 /* Should have been checked with N_BADMAG before this routine
520 bfd_get_start_address (abfd) = execp->a_entry;
522 obj_aout_symbols (abfd) = NULL;
523 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
525 /* The default relocation entry size is that of traditional V7 Unix. */
526 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
528 /* The default symbol entry size is that of traditional Unix. */
529 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
532 bfd_init_window (&obj_aout_sym_window (abfd));
533 bfd_init_window (&obj_aout_string_window (abfd));
535 obj_aout_external_syms (abfd) = NULL;
536 obj_aout_external_strings (abfd) = NULL;
537 obj_aout_sym_hashes (abfd) = NULL;
539 if (! NAME (aout, make_sections) (abfd))
542 obj_datasec (abfd)->size = execp->a_data;
543 obj_bsssec (abfd)->size = execp->a_bss;
545 obj_textsec (abfd)->flags =
546 (execp->a_trsize != 0
547 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
548 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
549 obj_datasec (abfd)->flags =
550 (execp->a_drsize != 0
551 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
552 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
553 obj_bsssec (abfd)->flags = SEC_ALLOC;
555 #ifdef THIS_IS_ONLY_DOCUMENTATION
556 /* The common code can't fill in these things because they depend
557 on either the start address of the text segment, the rounding
558 up of virtual addresses between segments, or the starting file
559 position of the text segment -- all of which varies among different
560 versions of a.out. */
562 /* Call back to the format-dependent code to fill in the rest of the
563 fields and do any further cleanup. Things that should be filled
564 in by the callback: */
566 struct exec *execp = exec_hdr (abfd);
568 obj_textsec (abfd)->size = N_TXTSIZE (*execp);
569 /* Data and bss are already filled in since they're so standard. */
571 /* The virtual memory addresses of the sections. */
572 obj_textsec (abfd)->vma = N_TXTADDR (*execp);
573 obj_datasec (abfd)->vma = N_DATADDR (*execp);
574 obj_bsssec (abfd)->vma = N_BSSADDR (*execp);
576 /* The file offsets of the sections. */
577 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
578 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
580 /* The file offsets of the relocation info. */
581 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp);
582 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp);
584 /* The file offsets of the string table and symbol table. */
585 obj_str_filepos (abfd) = N_STROFF (*execp);
586 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
588 /* Determine the architecture and machine type of the object file. */
589 switch (N_MACHTYPE (*exec_hdr (abfd)))
592 abfd->obj_arch = bfd_arch_obscure;
596 adata (abfd)->page_size = TARGET_PAGE_SIZE;
597 adata (abfd)->segment_size = SEGMENT_SIZE;
598 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
602 /* The architecture is encoded in various ways in various a.out variants,
603 or is not encoded at all in some of them. The relocation size depends
604 on the architecture and the a.out variant. Finally, the return value
605 is the bfd_target vector in use. If an error occurs, return zero and
606 set bfd_error to the appropriate error code.
608 Formats such as b.out, which have additional fields in the a.out
609 header, should cope with them in this callback as well. */
610 #endif /* DOCUMENTATION */
612 result = (*callback_to_real_object_p) (abfd);
614 /* Now that the segment addresses have been worked out, take a better
615 guess at whether the file is executable. If the entry point
616 is within the text segment, assume it is. (This makes files
617 executable even if their entry point address is 0, as long as
618 their text starts at zero.).
620 This test had to be changed to deal with systems where the text segment
621 runs at a different location than the default. The problem is that the
622 entry address can appear to be outside the text segment, thus causing an
623 erroneous conclusion that the file isn't executable.
625 To fix this, we now accept any non-zero entry point as an indication of
626 executability. This will work most of the time, since only the linker
627 sets the entry point, and that is likely to be non-zero for most systems. */
629 if (execp->a_entry != 0
630 || (execp->a_entry >= obj_textsec (abfd)->vma
631 && execp->a_entry < (obj_textsec (abfd)->vma
632 + obj_textsec (abfd)->size)))
633 abfd->flags |= EXEC_P;
637 struct stat stat_buf;
639 /* The original heuristic doesn't work in some important cases.
640 The a.out file has no information about the text start
641 address. For files (like kernels) linked to non-standard
642 addresses (ld -Ttext nnn) the entry point may not be between
643 the default text start (obj_textsec(abfd)->vma) and
644 (obj_textsec(abfd)->vma) + text size. This is not just a mach
645 issue. Many kernels are loaded at non standard addresses. */
646 if (abfd->iostream != NULL
647 && (abfd->flags & BFD_IN_MEMORY) == 0
648 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
649 && ((stat_buf.st_mode & 0111) != 0))
650 abfd->flags |= EXEC_P;
652 #endif /* STAT_FOR_EXEC */
658 bfd_release (abfd, rawptr);
659 abfd->tdata.aout_data = oldrawptr;
665 aout_@var{size}_mkobject
668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
671 Initialize BFD @var{abfd} for use with a.out files.
675 NAME (aout, mkobject) (bfd *abfd)
677 struct aout_data_struct *rawptr;
678 bfd_size_type amt = sizeof (* rawptr);
680 bfd_set_error (bfd_error_system_call);
682 rawptr = bfd_zalloc (abfd, amt);
686 abfd->tdata.aout_data = rawptr;
687 exec_hdr (abfd) = &(rawptr->e);
689 obj_textsec (abfd) = NULL;
690 obj_datasec (abfd) = NULL;
691 obj_bsssec (abfd) = NULL;
698 aout_@var{size}_machine_type
701 enum machine_type aout_@var{size}_machine_type
702 (enum bfd_architecture arch,
703 unsigned long machine,
704 bfd_boolean *unknown);
707 Keep track of machine architecture and machine type for
708 a.out's. Return the <<machine_type>> for a particular
709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
710 and machine can't be represented in a.out format.
712 If the architecture is understood, machine type 0 (default)
713 is always understood.
717 NAME (aout, machine_type) (enum bfd_architecture arch,
718 unsigned long machine,
719 bfd_boolean *unknown)
721 enum machine_type arch_flags;
723 arch_flags = M_UNKNOWN;
730 || machine == bfd_mach_sparc
731 || machine == bfd_mach_sparc_sparclite
732 || machine == bfd_mach_sparc_sparclite_le
733 || machine == bfd_mach_sparc_v8plus
734 || machine == bfd_mach_sparc_v8plusa
735 || machine == bfd_mach_sparc_v8plusb
736 || machine == bfd_mach_sparc_v9
737 || machine == bfd_mach_sparc_v9a
738 || machine == bfd_mach_sparc_v9b)
739 arch_flags = M_SPARC;
740 else if (machine == bfd_mach_sparc_sparclet)
741 arch_flags = M_SPARCLET;
747 case 0: arch_flags = M_68010; break;
748 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break;
749 case bfd_mach_m68010: arch_flags = M_68010; break;
750 case bfd_mach_m68020: arch_flags = M_68020; break;
751 default: arch_flags = M_UNKNOWN; break;
757 || machine == bfd_mach_i386_i386
758 || machine == bfd_mach_i386_i386_intel_syntax)
771 case bfd_mach_mips3000:
772 case bfd_mach_mips3900:
773 arch_flags = M_MIPS1;
775 case bfd_mach_mips6000:
776 arch_flags = M_MIPS2;
778 case bfd_mach_mips4000:
779 case bfd_mach_mips4010:
780 case bfd_mach_mips4100:
781 case bfd_mach_mips4300:
782 case bfd_mach_mips4400:
783 case bfd_mach_mips4600:
784 case bfd_mach_mips4650:
785 case bfd_mach_mips8000:
786 case bfd_mach_mips9000:
787 case bfd_mach_mips10000:
788 case bfd_mach_mips12000:
789 case bfd_mach_mips16:
790 case bfd_mach_mipsisa32:
791 case bfd_mach_mipsisa32r2:
793 case bfd_mach_mipsisa64:
794 case bfd_mach_mipsisa64r2:
795 case bfd_mach_mips_sb1:
796 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
797 arch_flags = M_MIPS2;
800 arch_flags = M_UNKNOWN;
808 case 0: arch_flags = M_NS32532; break;
809 case 32032: arch_flags = M_NS32032; break;
810 case 32532: arch_flags = M_NS32532; break;
811 default: arch_flags = M_UNKNOWN; break;
820 if (machine == 0 || machine == 255)
829 arch_flags = M_UNKNOWN;
832 if (arch_flags != M_UNKNOWN)
840 aout_@var{size}_set_arch_mach
843 bfd_boolean aout_@var{size}_set_arch_mach,
845 enum bfd_architecture arch,
846 unsigned long machine);
849 Set the architecture and the machine of the BFD @var{abfd} to the
850 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
851 can support the architecture required.
855 NAME (aout, set_arch_mach) (bfd *abfd,
856 enum bfd_architecture arch,
857 unsigned long machine)
859 if (! bfd_default_set_arch_mach (abfd, arch, machine))
862 if (arch != bfd_arch_unknown)
866 NAME (aout, machine_type) (arch, machine, &unknown);
871 /* Determine the size of a relocation entry. */
876 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
879 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
883 return (*aout_backend_info (abfd)->set_sizes) (abfd);
887 adjust_o_magic (bfd *abfd, struct internal_exec *execp)
889 file_ptr pos = adata (abfd).exec_bytes_size;
894 obj_textsec (abfd)->filepos = pos;
895 if (!obj_textsec (abfd)->user_set_vma)
896 obj_textsec (abfd)->vma = vma;
898 vma = obj_textsec (abfd)->vma;
900 pos += obj_textsec (abfd)->size;
901 vma += obj_textsec (abfd)->size;
904 if (!obj_datasec (abfd)->user_set_vma)
906 obj_textsec (abfd)->size += pad;
909 obj_datasec (abfd)->vma = vma;
912 vma = obj_datasec (abfd)->vma;
913 obj_datasec (abfd)->filepos = pos;
914 pos += obj_datasec (abfd)->size;
915 vma += obj_datasec (abfd)->size;
918 if (!obj_bsssec (abfd)->user_set_vma)
920 obj_datasec (abfd)->size += pad;
923 obj_bsssec (abfd)->vma = vma;
927 /* The VMA of the .bss section is set by the VMA of the
928 .data section plus the size of the .data section. We may
929 need to add padding bytes to make this true. */
930 pad = obj_bsssec (abfd)->vma - vma;
933 obj_datasec (abfd)->size += pad;
937 obj_bsssec (abfd)->filepos = pos;
939 /* Fix up the exec header. */
940 execp->a_text = obj_textsec (abfd)->size;
941 execp->a_data = obj_datasec (abfd)->size;
942 execp->a_bss = obj_bsssec (abfd)->size;
943 N_SET_MAGIC (*execp, OMAGIC);
947 adjust_z_magic (bfd *abfd, struct internal_exec *execp)
949 bfd_size_type data_pad, text_pad;
951 const struct aout_backend_data *abdp;
952 /* TRUE if text includes exec header. */
955 abdp = aout_backend_info (abfd);
959 && (abdp->text_includes_header
960 || obj_aout_subformat (abfd) == q_magic_format));
961 obj_textsec (abfd)->filepos = (ztih
962 ? adata (abfd).exec_bytes_size
963 : adata (abfd).zmagic_disk_block_size);
964 if (! obj_textsec (abfd)->user_set_vma)
966 /* ?? Do we really need to check for relocs here? */
967 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
970 ? (abdp->default_text_vma
971 + adata (abfd).exec_bytes_size)
972 : abdp->default_text_vma));
977 /* The .text section is being loaded at an unusual address. We
978 may need to pad it such that the .data section starts at a page
981 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
982 & (adata (abfd).page_size - 1));
984 text_pad = ((- obj_textsec (abfd)->vma)
985 & (adata (abfd).page_size - 1));
988 /* Find start of data. */
991 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size;
992 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
996 /* Note that if page_size == zmagic_disk_block_size, then
997 filepos == page_size, and this case is the same as the ztih
999 text_end = obj_textsec (abfd)->size;
1000 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1001 text_end += obj_textsec (abfd)->filepos;
1003 obj_textsec (abfd)->size += text_pad;
1004 text_end += text_pad;
1007 if (!obj_datasec (abfd)->user_set_vma)
1010 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size;
1011 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1013 if (abdp && abdp->zmagic_mapped_contiguous)
1015 asection * text = obj_textsec (abfd);
1016 asection * data = obj_datasec (abfd);
1018 text_pad = data->vma - (text->vma + text->size);
1019 /* Only pad the text section if the data
1020 section is going to be placed after it. */
1022 text->size += text_pad;
1024 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1025 + obj_textsec (abfd)->size);
1027 /* Fix up exec header while we're at it. */
1028 execp->a_text = obj_textsec (abfd)->size;
1029 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1030 execp->a_text += adata (abfd).exec_bytes_size;
1031 if (obj_aout_subformat (abfd) == q_magic_format)
1032 N_SET_MAGIC (*execp, QMAGIC);
1034 N_SET_MAGIC (*execp, ZMAGIC);
1036 /* Spec says data section should be rounded up to page boundary. */
1037 obj_datasec (abfd)->size
1038 = align_power (obj_datasec (abfd)->size,
1039 obj_bsssec (abfd)->alignment_power);
1040 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size,
1041 adata (abfd).page_size);
1042 data_pad = execp->a_data - obj_datasec (abfd)->size;
1045 if (!obj_bsssec (abfd)->user_set_vma)
1046 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1047 + obj_datasec (abfd)->size);
1048 /* If the BSS immediately follows the data section and extra space
1049 in the page is left after the data section, fudge data
1050 in the header so that the bss section looks smaller by that
1051 amount. We'll start the bss section there, and lie to the OS.
1052 (Note that a linker script, as well as the above assignment,
1053 could have explicitly set the BSS vma to immediately follow
1054 the data section.) */
1055 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1056 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size)
1057 execp->a_bss = (data_pad > obj_bsssec (abfd)->size
1058 ? 0 : obj_bsssec (abfd)->size - data_pad);
1060 execp->a_bss = obj_bsssec (abfd)->size;
1064 adjust_n_magic (bfd *abfd, struct internal_exec *execp)
1066 file_ptr pos = adata (abfd).exec_bytes_size;
1071 obj_textsec (abfd)->filepos = pos;
1072 if (!obj_textsec (abfd)->user_set_vma)
1073 obj_textsec (abfd)->vma = vma;
1075 vma = obj_textsec (abfd)->vma;
1076 pos += obj_textsec (abfd)->size;
1077 vma += obj_textsec (abfd)->size;
1080 obj_datasec (abfd)->filepos = pos;
1081 if (!obj_datasec (abfd)->user_set_vma)
1082 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1083 vma = obj_datasec (abfd)->vma;
1085 /* Since BSS follows data immediately, see if it needs alignment. */
1086 vma += obj_datasec (abfd)->size;
1087 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1088 obj_datasec (abfd)->size += pad;
1089 pos += obj_datasec (abfd)->size;
1092 if (!obj_bsssec (abfd)->user_set_vma)
1093 obj_bsssec (abfd)->vma = vma;
1095 vma = obj_bsssec (abfd)->vma;
1097 /* Fix up exec header. */
1098 execp->a_text = obj_textsec (abfd)->size;
1099 execp->a_data = obj_datasec (abfd)->size;
1100 execp->a_bss = obj_bsssec (abfd)->size;
1101 N_SET_MAGIC (*execp, NMAGIC);
1105 NAME (aout, adjust_sizes_and_vmas) (bfd *abfd,
1106 bfd_size_type *text_size,
1107 file_ptr *text_end ATTRIBUTE_UNUSED)
1109 struct internal_exec *execp = exec_hdr (abfd);
1111 if (! NAME (aout, make_sections) (abfd))
1114 if (adata (abfd).magic != undecided_magic)
1117 obj_textsec (abfd)->size =
1118 align_power (obj_textsec (abfd)->size,
1119 obj_textsec (abfd)->alignment_power);
1121 *text_size = obj_textsec (abfd)->size;
1122 /* Rule (heuristic) for when to pad to a new page. Note that there
1123 are (at least) two ways demand-paged (ZMAGIC) files have been
1124 handled. Most Berkeley-based systems start the text segment at
1125 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1126 segment right after the exec header; the latter is counted in the
1127 text segment size, and is paged in by the kernel with the rest of
1130 /* This perhaps isn't the right way to do this, but made it simpler for me
1131 to understand enough to implement it. Better would probably be to go
1132 right from BFD flags to alignment/positioning characteristics. But the
1133 old code was sloppy enough about handling the flags, and had enough
1134 other magic, that it was a little hard for me to understand. I think
1135 I understand it better now, but I haven't time to do the cleanup this
1138 if (abfd->flags & D_PAGED)
1139 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1140 adata (abfd).magic = z_magic;
1141 else if (abfd->flags & WP_TEXT)
1142 adata (abfd).magic = n_magic;
1144 adata (abfd).magic = o_magic;
1146 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1148 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1150 switch (adata (abfd).magic)
1152 case n_magic: str = "NMAGIC"; break;
1153 case o_magic: str = "OMAGIC"; break;
1154 case z_magic: str = "ZMAGIC"; break;
1159 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1160 obj_textsec (abfd)->alignment_power,
1161 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1162 obj_datasec (abfd)->alignment_power,
1163 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size,
1164 obj_bsssec (abfd)->alignment_power);
1168 switch (adata (abfd).magic)
1171 adjust_o_magic (abfd, execp);
1174 adjust_z_magic (abfd, execp);
1177 adjust_n_magic (abfd, execp);
1183 #ifdef BFD_AOUT_DEBUG
1184 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1185 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1186 obj_textsec (abfd)->filepos,
1187 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1188 obj_datasec (abfd)->filepos,
1189 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size);
1197 aout_@var{size}_new_section_hook
1200 bfd_boolean aout_@var{size}_new_section_hook,
1205 Called by the BFD in response to a @code{bfd_make_section}
1209 NAME (aout, new_section_hook) (bfd *abfd, asection *newsect)
1211 /* Align to double at least. */
1212 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
1214 if (bfd_get_format (abfd) == bfd_object)
1216 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1218 obj_textsec (abfd)= newsect;
1219 newsect->target_index = N_TEXT;
1221 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1223 obj_datasec (abfd) = newsect;
1224 newsect->target_index = N_DATA;
1226 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1228 obj_bsssec (abfd) = newsect;
1229 newsect->target_index = N_BSS;
1233 /* We allow more than three sections internally. */
1234 return _bfd_generic_new_section_hook (abfd, newsect);
1238 NAME (aout, set_section_contents) (bfd *abfd,
1240 const void * location,
1242 bfd_size_type count)
1245 bfd_size_type text_size;
1247 if (! abfd->output_has_begun)
1249 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1253 if (section == obj_bsssec (abfd))
1255 bfd_set_error (bfd_error_no_contents);
1259 if (section != obj_textsec (abfd)
1260 && section != obj_datasec (abfd))
1262 if (aout_section_merge_with_text_p (abfd, section))
1263 section->filepos = obj_textsec (abfd)->filepos +
1264 (section->vma - obj_textsec (abfd)->vma);
1267 (*_bfd_error_handler)
1268 (_("%s: can not represent section `%s' in a.out object file format"),
1269 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1270 bfd_set_error (bfd_error_nonrepresentable_section);
1277 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1278 || bfd_bwrite (location, count, abfd) != count)
1285 /* Read the external symbols from an a.out file. */
1288 aout_get_external_symbols (bfd *abfd)
1290 if (obj_aout_external_syms (abfd) == NULL)
1292 bfd_size_type count;
1293 struct external_nlist *syms;
1296 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1299 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
1300 exec_hdr (abfd)->a_syms,
1301 &obj_aout_sym_window (abfd), TRUE))
1303 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1305 /* We allocate using malloc to make the values easy to free
1306 later on. If we put them on the objalloc it might not be
1307 possible to free them. */
1308 syms = bfd_malloc (count * EXTERNAL_NLIST_SIZE);
1309 if (syms == NULL && count != 0)
1312 amt = exec_hdr (abfd)->a_syms;
1313 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1314 || bfd_bread (syms, amt, abfd) != amt)
1321 obj_aout_external_syms (abfd) = syms;
1322 obj_aout_external_sym_count (abfd) = count;
1325 if (obj_aout_external_strings (abfd) == NULL
1326 && exec_hdr (abfd)->a_syms != 0)
1328 unsigned char string_chars[BYTES_IN_WORD];
1329 bfd_size_type stringsize;
1331 bfd_size_type amt = BYTES_IN_WORD;
1333 /* Get the size of the strings. */
1334 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1335 || bfd_bread ((void *) string_chars, amt, abfd) != amt)
1337 stringsize = GET_WORD (abfd, string_chars);
1340 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1341 &obj_aout_string_window (abfd), TRUE))
1343 strings = (char *) obj_aout_string_window (abfd).data;
1345 strings = bfd_malloc (stringsize + 1);
1346 if (strings == NULL)
1349 /* Skip space for the string count in the buffer for convenience
1350 when using indexes. */
1351 amt = stringsize - BYTES_IN_WORD;
1352 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1359 /* Ensure that a zero index yields an empty string. */
1362 strings[stringsize - 1] = 0;
1364 obj_aout_external_strings (abfd) = strings;
1365 obj_aout_external_string_size (abfd) = stringsize;
1371 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1372 and symbol->value fields of CACHE_PTR will be set from the a.out
1373 nlist structure. This function is responsible for setting
1374 symbol->flags and symbol->section, and adjusting symbol->value. */
1377 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1381 if ((cache_ptr->type & N_STAB) != 0
1382 || cache_ptr->type == N_FN)
1386 /* This is a debugging symbol. */
1387 cache_ptr->symbol.flags = BSF_DEBUGGING;
1389 /* Work out the symbol section. */
1390 switch (cache_ptr->type & N_TYPE)
1394 sec = obj_textsec (abfd);
1397 sec = obj_datasec (abfd);
1400 sec = obj_bsssec (abfd);
1404 sec = bfd_abs_section_ptr;
1408 cache_ptr->symbol.section = sec;
1409 cache_ptr->symbol.value -= sec->vma;
1414 /* Get the default visibility. This does not apply to all types, so
1415 we just hold it in a local variable to use if wanted. */
1416 if ((cache_ptr->type & N_EXT) == 0)
1417 visible = BSF_LOCAL;
1419 visible = BSF_GLOBAL;
1421 switch (cache_ptr->type)
1424 case N_ABS: case N_ABS | N_EXT:
1425 cache_ptr->symbol.section = bfd_abs_section_ptr;
1426 cache_ptr->symbol.flags = visible;
1429 case N_UNDF | N_EXT:
1430 if (cache_ptr->symbol.value != 0)
1432 /* This is a common symbol. */
1433 cache_ptr->symbol.flags = BSF_GLOBAL;
1434 cache_ptr->symbol.section = bfd_com_section_ptr;
1438 cache_ptr->symbol.flags = 0;
1439 cache_ptr->symbol.section = bfd_und_section_ptr;
1443 case N_TEXT: case N_TEXT | N_EXT:
1444 cache_ptr->symbol.section = obj_textsec (abfd);
1445 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1446 cache_ptr->symbol.flags = visible;
1449 /* N_SETV symbols used to represent set vectors placed in the
1450 data section. They are no longer generated. Theoretically,
1451 it was possible to extract the entries and combine them with
1452 new ones, although I don't know if that was ever actually
1453 done. Unless that feature is restored, treat them as data
1455 case N_SETV: case N_SETV | N_EXT:
1456 case N_DATA: case N_DATA | N_EXT:
1457 cache_ptr->symbol.section = obj_datasec (abfd);
1458 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1459 cache_ptr->symbol.flags = visible;
1462 case N_BSS: case N_BSS | N_EXT:
1463 cache_ptr->symbol.section = obj_bsssec (abfd);
1464 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1465 cache_ptr->symbol.flags = visible;
1468 case N_SETA: case N_SETA | N_EXT:
1469 case N_SETT: case N_SETT | N_EXT:
1470 case N_SETD: case N_SETD | N_EXT:
1471 case N_SETB: case N_SETB | N_EXT:
1473 /* This code is no longer needed. It used to be used to make
1474 the linker handle set symbols, but they are now handled in
1475 the add_symbols routine instead. */
1476 switch (cache_ptr->type & N_TYPE)
1479 cache_ptr->symbol.section = bfd_abs_section_ptr;
1482 cache_ptr->symbol.section = obj_textsec (abfd);
1485 cache_ptr->symbol.section = obj_datasec (abfd);
1488 cache_ptr->symbol.section = obj_bsssec (abfd);
1492 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1497 /* This symbol is the text of a warning message. The next
1498 symbol is the symbol to associate the warning with. If a
1499 reference is made to that symbol, a warning is issued. */
1500 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1501 cache_ptr->symbol.section = bfd_abs_section_ptr;
1504 case N_INDR: case N_INDR | N_EXT:
1505 /* An indirect symbol. This consists of two symbols in a row.
1506 The first symbol is the name of the indirection. The second
1507 symbol is the name of the target. A reference to the first
1508 symbol becomes a reference to the second. */
1509 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1510 cache_ptr->symbol.section = bfd_ind_section_ptr;
1514 cache_ptr->symbol.section = bfd_und_section_ptr;
1515 cache_ptr->symbol.flags = BSF_WEAK;
1519 cache_ptr->symbol.section = bfd_abs_section_ptr;
1520 cache_ptr->symbol.flags = BSF_WEAK;
1524 cache_ptr->symbol.section = obj_textsec (abfd);
1525 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1526 cache_ptr->symbol.flags = BSF_WEAK;
1530 cache_ptr->symbol.section = obj_datasec (abfd);
1531 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1532 cache_ptr->symbol.flags = BSF_WEAK;
1536 cache_ptr->symbol.section = obj_bsssec (abfd);
1537 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1538 cache_ptr->symbol.flags = BSF_WEAK;
1545 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1548 translate_to_native_sym_flags (bfd *abfd,
1550 struct external_nlist *sym_pointer)
1552 bfd_vma value = cache_ptr->value;
1556 /* Mask out any existing type bits in case copying from one section
1558 sym_pointer->e_type[0] &= ~N_TYPE;
1560 sec = bfd_get_section (cache_ptr);
1565 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1567 (*_bfd_error_handler)
1568 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1569 bfd_get_filename (abfd),
1570 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1571 bfd_set_error (bfd_error_nonrepresentable_section);
1575 if (sec->output_section != NULL)
1577 off = sec->output_offset;
1578 sec = sec->output_section;
1581 if (bfd_is_abs_section (sec))
1582 sym_pointer->e_type[0] |= N_ABS;
1583 else if (sec == obj_textsec (abfd))
1584 sym_pointer->e_type[0] |= N_TEXT;
1585 else if (sec == obj_datasec (abfd))
1586 sym_pointer->e_type[0] |= N_DATA;
1587 else if (sec == obj_bsssec (abfd))
1588 sym_pointer->e_type[0] |= N_BSS;
1589 else if (bfd_is_und_section (sec))
1590 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1591 else if (bfd_is_ind_section (sec))
1592 sym_pointer->e_type[0] = N_INDR;
1593 else if (bfd_is_com_section (sec))
1594 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1597 if (aout_section_merge_with_text_p (abfd, sec))
1598 sym_pointer->e_type[0] |= N_TEXT;
1601 (*_bfd_error_handler)
1602 (_("%s: can not represent section `%s' in a.out object file format"),
1603 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1604 bfd_set_error (bfd_error_nonrepresentable_section);
1609 /* Turn the symbol from section relative to absolute again. */
1610 value += sec->vma + off;
1612 if ((cache_ptr->flags & BSF_WARNING) != 0)
1613 sym_pointer->e_type[0] = N_WARNING;
1615 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1616 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1617 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1618 sym_pointer->e_type[0] |= N_EXT;
1619 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1620 sym_pointer->e_type[0] &= ~N_EXT;
1622 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1624 int type = ((aout_symbol_type *) cache_ptr)->type;
1628 case N_ABS: type = N_SETA; break;
1629 case N_TEXT: type = N_SETT; break;
1630 case N_DATA: type = N_SETD; break;
1631 case N_BSS: type = N_SETB; break;
1633 sym_pointer->e_type[0] = type;
1636 if ((cache_ptr->flags & BSF_WEAK) != 0)
1640 switch (sym_pointer->e_type[0] & N_TYPE)
1643 case N_ABS: type = N_WEAKA; break;
1644 case N_TEXT: type = N_WEAKT; break;
1645 case N_DATA: type = N_WEAKD; break;
1646 case N_BSS: type = N_WEAKB; break;
1647 case N_UNDF: type = N_WEAKU; break;
1649 sym_pointer->e_type[0] = type;
1652 PUT_WORD (abfd, value, sym_pointer->e_value);
1657 /* Native-level interface to symbols. */
1660 NAME (aout, make_empty_symbol) (bfd *abfd)
1662 bfd_size_type amt = sizeof (aout_symbol_type);
1664 aout_symbol_type *new = bfd_zalloc (abfd, amt);
1667 new->symbol.the_bfd = abfd;
1669 return &new->symbol;
1672 /* Translate a set of internal symbols into external symbols. */
1675 NAME (aout, translate_symbol_table) (bfd *abfd,
1676 aout_symbol_type *in,
1677 struct external_nlist *ext,
1678 bfd_size_type count,
1680 bfd_size_type strsize,
1681 bfd_boolean dynamic)
1683 struct external_nlist *ext_end;
1685 ext_end = ext + count;
1686 for (; ext < ext_end; ext++, in++)
1690 x = GET_WORD (abfd, ext->e_strx);
1691 in->symbol.the_bfd = abfd;
1693 /* For the normal symbols, the zero index points at the number
1694 of bytes in the string table but is to be interpreted as the
1695 null string. For the dynamic symbols, the number of bytes in
1696 the string table is stored in the __DYNAMIC structure and the
1697 zero index points at an actual string. */
1698 if (x == 0 && ! dynamic)
1699 in->symbol.name = "";
1700 else if (x < strsize)
1701 in->symbol.name = str + x;
1705 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1706 in->desc = H_GET_16 (abfd, ext->e_desc);
1707 in->other = H_GET_8 (abfd, ext->e_other);
1708 in->type = H_GET_8 (abfd, ext->e_type);
1709 in->symbol.udata.p = NULL;
1711 if (! translate_from_native_sym_flags (abfd, in))
1715 in->symbol.flags |= BSF_DYNAMIC;
1721 /* We read the symbols into a buffer, which is discarded when this
1722 function exits. We read the strings into a buffer large enough to
1723 hold them all plus all the cached symbol entries. */
1726 NAME (aout, slurp_symbol_table) (bfd *abfd)
1728 struct external_nlist *old_external_syms;
1729 aout_symbol_type *cached;
1730 bfd_size_type cached_size;
1732 /* If there's no work to be done, don't do any. */
1733 if (obj_aout_symbols (abfd) != NULL)
1736 old_external_syms = obj_aout_external_syms (abfd);
1738 if (! aout_get_external_symbols (abfd))
1741 cached_size = obj_aout_external_sym_count (abfd);
1742 if (cached_size == 0)
1743 return TRUE; /* Nothing to do. */
1745 cached_size *= sizeof (aout_symbol_type);
1746 cached = bfd_zmalloc (cached_size);
1750 /* Convert from external symbol information to internal. */
1751 if (! (NAME (aout, translate_symbol_table)
1753 obj_aout_external_syms (abfd),
1754 obj_aout_external_sym_count (abfd),
1755 obj_aout_external_strings (abfd),
1756 obj_aout_external_string_size (abfd),
1763 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1765 obj_aout_symbols (abfd) = cached;
1767 /* It is very likely that anybody who calls this function will not
1768 want the external symbol information, so if it was allocated
1769 because of our call to aout_get_external_symbols, we free it up
1770 right away to save space. */
1771 if (old_external_syms == NULL
1772 && obj_aout_external_syms (abfd) != NULL)
1775 bfd_free_window (&obj_aout_sym_window (abfd));
1777 free (obj_aout_external_syms (abfd));
1779 obj_aout_external_syms (abfd) = NULL;
1785 /* We use a hash table when writing out symbols so that we only write
1786 out a particular string once. This helps particularly when the
1787 linker writes out stabs debugging entries, because each different
1788 contributing object file tends to have many duplicate stabs
1791 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1792 if BFD_TRADITIONAL_FORMAT is set. */
1794 /* Get the index of a string in a strtab, adding it if it is not
1797 static inline bfd_size_type
1798 add_to_stringtab (bfd *abfd,
1799 struct bfd_strtab_hash *tab,
1804 bfd_size_type index;
1806 /* An index of 0 always means the empty string. */
1807 if (str == 0 || *str == '\0')
1810 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1811 doesn't understand a hashed string table. */
1813 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1816 index = _bfd_stringtab_add (tab, str, hash, copy);
1818 if (index != (bfd_size_type) -1)
1819 /* Add BYTES_IN_WORD to the return value to account for the
1820 space taken up by the string table size. */
1821 index += BYTES_IN_WORD;
1826 /* Write out a strtab. ABFD is already at the right location in the
1830 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1832 bfd_byte buffer[BYTES_IN_WORD];
1833 bfd_size_type amt = BYTES_IN_WORD;
1835 /* The string table starts with the size. */
1836 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1837 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1840 return _bfd_stringtab_emit (abfd, tab);
1844 NAME (aout, write_syms) (bfd *abfd)
1846 unsigned int count ;
1847 asymbol **generic = bfd_get_outsymbols (abfd);
1848 struct bfd_strtab_hash *strtab;
1850 strtab = _bfd_stringtab_init ();
1854 for (count = 0; count < bfd_get_symcount (abfd); count++)
1856 asymbol *g = generic[count];
1858 struct external_nlist nsp;
1861 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1862 if (indx == (bfd_size_type) -1)
1864 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1866 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1868 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1869 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1870 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1874 H_PUT_16 (abfd, 0, nsp.e_desc);
1875 H_PUT_8 (abfd, 0, nsp.e_other);
1876 H_PUT_8 (abfd, 0, nsp.e_type);
1879 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1882 amt = EXTERNAL_NLIST_SIZE;
1883 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1886 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1887 here, at the end. */
1891 if (! emit_stringtab (abfd, strtab))
1894 _bfd_stringtab_free (strtab);
1899 _bfd_stringtab_free (strtab);
1904 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1906 unsigned int counter = 0;
1907 aout_symbol_type *symbase;
1909 if (!NAME (aout, slurp_symbol_table) (abfd))
1912 for (symbase = obj_aout_symbols (abfd);
1913 counter++ < bfd_get_symcount (abfd);
1915 *(location++) = (asymbol *) (symbase++);
1917 return bfd_get_symcount (abfd);
1920 /* Standard reloc stuff. */
1921 /* Output standard relocation information to a file in target byte order. */
1923 extern void NAME (aout, swap_std_reloc_out)
1924 (bfd *, arelent *, struct reloc_std_external *);
1927 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1929 struct reloc_std_external *natptr)
1932 asymbol *sym = *(g->sym_ptr_ptr);
1934 unsigned int r_length;
1936 int r_baserel, r_jmptable, r_relative;
1937 asection *output_section = sym->section->output_section;
1939 PUT_WORD (abfd, g->address, natptr->r_address);
1941 r_length = g->howto->size ; /* Size as a power of two. */
1942 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1943 /* XXX This relies on relocs coming from a.out files. */
1944 r_baserel = (g->howto->type & 8) != 0;
1945 r_jmptable = (g->howto->type & 16) != 0;
1946 r_relative = (g->howto->type & 32) != 0;
1948 /* Name was clobbered by aout_write_syms to be symbol index. */
1950 /* If this relocation is relative to a symbol then set the
1951 r_index to the symbols index, and the r_extern bit.
1953 Absolute symbols can come in in two ways, either as an offset
1954 from the abs section, or as a symbol which has an abs value.
1955 check for that here. */
1957 if (bfd_is_com_section (output_section)
1958 || bfd_is_abs_section (output_section)
1959 || bfd_is_und_section (output_section)
1960 /* PR gas/3041 a.out relocs against weak symbols
1961 must be treated as if they were against externs. */
1962 || (sym->flags & BSF_WEAK))
1964 if (bfd_abs_section_ptr->symbol == sym)
1966 /* Whoops, looked like an abs symbol, but is
1967 really an offset from the abs section. */
1973 /* Fill in symbol. */
1975 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1980 /* Just an ordinary section. */
1982 r_index = output_section->target_index;
1985 /* Now the fun stuff. */
1986 if (bfd_header_big_endian (abfd))
1988 natptr->r_index[0] = r_index >> 16;
1989 natptr->r_index[1] = r_index >> 8;
1990 natptr->r_index[2] = r_index;
1991 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
1992 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
1993 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
1994 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
1995 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
1996 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2000 natptr->r_index[2] = r_index >> 16;
2001 natptr->r_index[1] = r_index >> 8;
2002 natptr->r_index[0] = r_index;
2003 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2004 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2005 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2006 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2007 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2008 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2012 /* Extended stuff. */
2013 /* Output extended relocation information to a file in target byte order. */
2015 extern void NAME (aout, swap_ext_reloc_out)
2016 (bfd *, arelent *, struct reloc_ext_external *);
2019 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2021 struct reloc_ext_external *natptr)
2025 unsigned int r_type;
2027 asymbol *sym = *(g->sym_ptr_ptr);
2028 asection *output_section = sym->section->output_section;
2030 PUT_WORD (abfd, g->address, natptr->r_address);
2032 r_type = (unsigned int) g->howto->type;
2034 r_addend = g->addend;
2035 if ((sym->flags & BSF_SECTION_SYM) != 0)
2036 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2038 /* If this relocation is relative to a symbol then set the
2039 r_index to the symbols index, and the r_extern bit.
2041 Absolute symbols can come in in two ways, either as an offset
2042 from the abs section, or as a symbol which has an abs value.
2043 check for that here. */
2044 if (bfd_is_abs_section (bfd_get_section (sym)))
2049 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2051 if (bfd_is_und_section (bfd_get_section (sym))
2052 || (sym->flags & BSF_GLOBAL) != 0)
2056 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2060 /* Just an ordinary section. */
2062 r_index = output_section->target_index;
2065 /* Now the fun stuff. */
2066 if (bfd_header_big_endian (abfd))
2068 natptr->r_index[0] = r_index >> 16;
2069 natptr->r_index[1] = r_index >> 8;
2070 natptr->r_index[2] = r_index;
2071 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2072 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2076 natptr->r_index[2] = r_index >> 16;
2077 natptr->r_index[1] = r_index >> 8;
2078 natptr->r_index[0] = r_index;
2079 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2080 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2083 PUT_WORD (abfd, r_addend, natptr->r_addend);
2086 /* BFD deals internally with all things based from the section they're
2087 in. so, something in 10 bytes into a text section with a base of
2088 50 would have a symbol (.text+10) and know .text vma was 50.
2090 Aout keeps all it's symbols based from zero, so the symbol would
2091 contain 60. This macro subs the base of each section from the value
2092 to give the true offset from the section. */
2094 #define MOVE_ADDRESS(ad) \
2097 /* Undefined symbol. */ \
2098 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2099 cache_ptr->addend = ad; \
2103 /* Defined, section relative. Replace symbol with pointer to \
2104 symbol which points to section. */ \
2108 case N_TEXT | N_EXT: \
2109 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2110 cache_ptr->addend = ad - su->textsec->vma; \
2113 case N_DATA | N_EXT: \
2114 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2115 cache_ptr->addend = ad - su->datasec->vma; \
2118 case N_BSS | N_EXT: \
2119 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2120 cache_ptr->addend = ad - su->bsssec->vma; \
2124 case N_ABS | N_EXT: \
2125 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2126 cache_ptr->addend = ad; \
2132 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2133 struct reloc_ext_external *bytes,
2136 bfd_size_type symcount)
2138 unsigned int r_index;
2140 unsigned int r_type;
2141 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2143 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2145 /* Now the fun stuff. */
2146 if (bfd_header_big_endian (abfd))
2148 r_index = (((unsigned int) bytes->r_index[0] << 16)
2149 | ((unsigned int) bytes->r_index[1] << 8)
2150 | bytes->r_index[2]);
2151 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2152 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2153 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2157 r_index = (((unsigned int) bytes->r_index[2] << 16)
2158 | ((unsigned int) bytes->r_index[1] << 8)
2159 | bytes->r_index[0]);
2160 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2161 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2162 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2165 if (r_type < TABLE_SIZE (howto_table_ext))
2166 cache_ptr->howto = howto_table_ext + r_type;
2168 cache_ptr->howto = NULL;
2170 /* Base relative relocs are always against the symbol table,
2171 regardless of the setting of r_extern. r_extern just reflects
2172 whether the symbol the reloc is against is local or global. */
2173 if (r_type == (unsigned int) RELOC_BASE10
2174 || r_type == (unsigned int) RELOC_BASE13
2175 || r_type == (unsigned int) RELOC_BASE22)
2178 if (r_extern && r_index > symcount)
2180 /* We could arrange to return an error, but it might be useful
2181 to see the file even if it is bad. */
2186 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2190 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2191 struct reloc_std_external *bytes,
2194 bfd_size_type symcount)
2196 unsigned int r_index;
2198 unsigned int r_length;
2200 int r_baserel, r_jmptable, r_relative;
2201 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2202 unsigned int howto_idx;
2204 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2206 /* Now the fun stuff. */
2207 if (bfd_header_big_endian (abfd))
2209 r_index = (((unsigned int) bytes->r_index[0] << 16)
2210 | ((unsigned int) bytes->r_index[1] << 8)
2211 | bytes->r_index[2]);
2212 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2213 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2214 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2215 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2216 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2217 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2218 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2222 r_index = (((unsigned int) bytes->r_index[2] << 16)
2223 | ((unsigned int) bytes->r_index[1] << 8)
2224 | bytes->r_index[0]);
2225 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2226 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2227 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2228 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2229 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2230 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2231 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2234 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2235 + 16 * r_jmptable + 32 * r_relative);
2236 if (howto_idx < TABLE_SIZE (howto_table_std))
2238 cache_ptr->howto = howto_table_std + howto_idx;
2239 if (cache_ptr->howto->type == (unsigned int) -1)
2240 cache_ptr->howto = NULL;
2243 cache_ptr->howto = NULL;
2245 /* Base relative relocs are always against the symbol table,
2246 regardless of the setting of r_extern. r_extern just reflects
2247 whether the symbol the reloc is against is local or global. */
2251 if (r_extern && r_index > symcount)
2253 /* We could arrange to return an error, but it might be useful
2254 to see the file even if it is bad. */
2262 /* Read and swap the relocs for a section. */
2265 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2267 bfd_size_type count;
2268 bfd_size_type reloc_size;
2270 arelent *reloc_cache;
2272 unsigned int counter = 0;
2276 if (asect->relocation)
2279 if (asect->flags & SEC_CONSTRUCTOR)
2282 if (asect == obj_datasec (abfd))
2283 reloc_size = exec_hdr (abfd)->a_drsize;
2284 else if (asect == obj_textsec (abfd))
2285 reloc_size = exec_hdr (abfd)->a_trsize;
2286 else if (asect == obj_bsssec (abfd))
2290 bfd_set_error (bfd_error_invalid_operation);
2294 if (reloc_size == 0)
2295 return TRUE; /* Nothing to be done. */
2297 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2300 each_size = obj_reloc_entry_size (abfd);
2302 count = reloc_size / each_size;
2304 return TRUE; /* Nothing to be done. */
2306 amt = count * sizeof (arelent);
2307 reloc_cache = bfd_zmalloc (amt);
2308 if (reloc_cache == NULL)
2311 relocs = bfd_malloc (reloc_size);
2318 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2325 cache_ptr = reloc_cache;
2326 if (each_size == RELOC_EXT_SIZE)
2328 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2330 for (; counter < count; counter++, rptr++, cache_ptr++)
2331 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2332 (bfd_size_type) bfd_get_symcount (abfd));
2336 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2338 for (; counter < count; counter++, rptr++, cache_ptr++)
2339 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2340 (bfd_size_type) bfd_get_symcount (abfd));
2345 asect->relocation = reloc_cache;
2346 asect->reloc_count = cache_ptr - reloc_cache;
2351 /* Write out a relocation section into an object file. */
2354 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2357 unsigned char *native, *natptr;
2360 unsigned int count = section->reloc_count;
2361 bfd_size_type natsize;
2363 if (count == 0 || section->orelocation == NULL)
2366 each_size = obj_reloc_entry_size (abfd);
2367 natsize = (bfd_size_type) each_size * count;
2368 native = bfd_zalloc (abfd, natsize);
2372 generic = section->orelocation;
2374 if (each_size == RELOC_EXT_SIZE)
2376 for (natptr = native;
2378 --count, natptr += each_size, ++generic)
2379 MY_swap_ext_reloc_out (abfd, *generic,
2380 (struct reloc_ext_external *) natptr);
2384 for (natptr = native;
2386 --count, natptr += each_size, ++generic)
2387 MY_swap_std_reloc_out (abfd, *generic,
2388 (struct reloc_std_external *) natptr);
2391 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2393 bfd_release (abfd, native);
2396 bfd_release (abfd, native);
2401 /* This is stupid. This function should be a boolean predicate. */
2404 NAME (aout, canonicalize_reloc) (bfd *abfd,
2409 arelent *tblptr = section->relocation;
2412 if (section == obj_bsssec (abfd))
2418 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2421 if (section->flags & SEC_CONSTRUCTOR)
2423 arelent_chain *chain = section->constructor_chain;
2424 for (count = 0; count < section->reloc_count; count ++)
2426 *relptr ++ = &chain->relent;
2427 chain = chain->next;
2432 tblptr = section->relocation;
2434 for (count = 0; count++ < section->reloc_count; )
2436 *relptr++ = tblptr++;
2441 return section->reloc_count;
2445 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2447 if (bfd_get_format (abfd) != bfd_object)
2449 bfd_set_error (bfd_error_invalid_operation);
2453 if (asect->flags & SEC_CONSTRUCTOR)
2454 return sizeof (arelent *) * (asect->reloc_count + 1);
2456 if (asect == obj_datasec (abfd))
2457 return sizeof (arelent *)
2458 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2461 if (asect == obj_textsec (abfd))
2462 return sizeof (arelent *)
2463 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2466 if (asect == obj_bsssec (abfd))
2467 return sizeof (arelent *);
2469 if (asect == obj_bsssec (abfd))
2472 bfd_set_error (bfd_error_invalid_operation);
2477 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2479 if (!NAME (aout, slurp_symbol_table) (abfd))
2482 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2486 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2487 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2493 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2497 bfd_symbol_info (symbol, ret);
2499 if (ret->type == '?')
2501 int type_code = aout_symbol (symbol)->type & 0xff;
2502 const char *stab_name = bfd_get_stab_name (type_code);
2503 static char buf[10];
2505 if (stab_name == NULL)
2507 sprintf (buf, "(%d)", type_code);
2511 ret->stab_type = type_code;
2512 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2513 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2514 ret->stab_name = stab_name;
2519 NAME (aout, print_symbol) (bfd *abfd,
2522 bfd_print_symbol_type how)
2524 FILE *file = (FILE *)afile;
2528 case bfd_print_symbol_name:
2530 fprintf (file,"%s", symbol->name);
2532 case bfd_print_symbol_more:
2533 fprintf (file,"%4x %2x %2x",
2534 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2535 (unsigned) (aout_symbol (symbol)->other & 0xff),
2536 (unsigned) (aout_symbol (symbol)->type));
2538 case bfd_print_symbol_all:
2540 const char *section_name = symbol->section->name;
2542 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2544 fprintf (file," %-5s %04x %02x %02x",
2546 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2547 (unsigned) (aout_symbol (symbol)->other & 0xff),
2548 (unsigned) (aout_symbol (symbol)->type & 0xff));
2550 fprintf (file," %s", symbol->name);
2556 /* If we don't have to allocate more than 1MB to hold the generic
2557 symbols, we use the generic minisymbol methord: it's faster, since
2558 it only translates the symbols once, not multiple times. */
2559 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2561 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2562 symbols. The minisymbol_to_symbol function translates these into
2563 BFD asymbol structures. */
2566 NAME (aout, read_minisymbols) (bfd *abfd,
2567 bfd_boolean dynamic,
2569 unsigned int *sizep)
2572 /* We could handle the dynamic symbols here as well, but it's
2573 easier to hand them off. */
2574 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2576 if (! aout_get_external_symbols (abfd))
2579 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2580 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2582 *minisymsp = (void *) obj_aout_external_syms (abfd);
2584 /* By passing the external symbols back from this routine, we are
2585 giving up control over the memory block. Clear
2586 obj_aout_external_syms, so that we do not try to free it
2588 obj_aout_external_syms (abfd) = NULL;
2590 *sizep = EXTERNAL_NLIST_SIZE;
2591 return obj_aout_external_sym_count (abfd);
2594 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2595 unmodified a.out symbol. The SYM argument is a structure returned
2596 by bfd_make_empty_symbol, which we fill in here. */
2599 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2600 bfd_boolean dynamic,
2601 const void * minisym,
2605 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2606 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2608 memset (sym, 0, sizeof (aout_symbol_type));
2610 /* We call translate_symbol_table to translate a single symbol. */
2611 if (! (NAME (aout, translate_symbol_table)
2613 (aout_symbol_type *) sym,
2614 (struct external_nlist *) minisym,
2616 obj_aout_external_strings (abfd),
2617 obj_aout_external_string_size (abfd),
2624 /* Provided a BFD, a section and an offset into the section, calculate
2625 and return the name of the source file and the line nearest to the
2629 NAME (aout, find_nearest_line) (bfd *abfd,
2633 const char **filename_ptr,
2634 const char **functionname_ptr,
2635 unsigned int *line_ptr)
2637 /* Run down the file looking for the filename, function and linenumber. */
2639 const char *directory_name = NULL;
2640 const char *main_file_name = NULL;
2641 const char *current_file_name = NULL;
2642 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2643 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2644 bfd_vma low_line_vma = 0;
2645 bfd_vma low_func_vma = 0;
2647 bfd_size_type filelen, funclen;
2650 *filename_ptr = abfd->filename;
2651 *functionname_ptr = 0;
2654 if (symbols != NULL)
2656 for (p = symbols; *p; p++)
2658 aout_symbol_type *q = (aout_symbol_type *) (*p);
2663 /* If this looks like a file name symbol, and it comes after
2664 the line number we have found so far, but before the
2665 offset, then we have probably not found the right line
2667 if (q->symbol.value <= offset
2668 && ((q->symbol.value > low_line_vma
2669 && (line_file_name != NULL
2671 || (q->symbol.value > low_func_vma
2674 const char *symname;
2676 symname = q->symbol.name;
2677 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2679 if (q->symbol.value > low_line_vma)
2682 line_file_name = NULL;
2684 if (q->symbol.value > low_func_vma)
2691 /* If this symbol is less than the offset, but greater than
2692 the line number we have found so far, then we have not
2693 found the right line number. */
2694 if (q->symbol.value <= offset)
2696 if (q->symbol.value > low_line_vma)
2699 line_file_name = NULL;
2701 if (q->symbol.value > low_func_vma)
2705 main_file_name = current_file_name = q->symbol.name;
2706 /* Look ahead to next symbol to check if that too is an N_SO. */
2710 q = (aout_symbol_type *) (*p);
2711 if (q->type != (int)N_SO)
2714 /* Found a second N_SO First is directory; second is filename. */
2715 directory_name = current_file_name;
2716 main_file_name = current_file_name = q->symbol.name;
2717 if (obj_textsec (abfd) != section)
2721 current_file_name = q->symbol.name;
2728 /* We'll keep this if it resolves nearer than the one we have
2730 if (q->symbol.value >= low_line_vma
2731 && q->symbol.value <= offset)
2733 *line_ptr = q->desc;
2734 low_line_vma = q->symbol.value;
2735 line_file_name = current_file_name;
2736 line_directory_name = directory_name;
2741 /* We'll keep this if it is nearer than the one we have already. */
2742 if (q->symbol.value >= low_func_vma &&
2743 q->symbol.value <= offset)
2745 low_func_vma = q->symbol.value;
2746 func = (asymbol *)q;
2748 else if (q->symbol.value > offset)
2759 main_file_name = line_file_name;
2760 directory_name = line_directory_name;
2763 if (main_file_name == NULL
2764 || IS_ABSOLUTE_PATH (main_file_name)
2765 || directory_name == NULL)
2768 filelen = strlen (directory_name) + strlen (main_file_name);
2773 funclen = strlen (bfd_asymbol_name (func));
2775 if (adata (abfd).line_buf != NULL)
2776 free (adata (abfd).line_buf);
2778 if (filelen + funclen == 0)
2779 adata (abfd).line_buf = buf = NULL;
2782 buf = bfd_malloc (filelen + funclen + 3);
2783 adata (abfd).line_buf = buf;
2788 if (main_file_name != NULL)
2790 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2791 *filename_ptr = main_file_name;
2794 sprintf (buf, "%s%s", directory_name, main_file_name);
2795 *filename_ptr = buf;
2802 const char *function = func->name;
2805 /* The caller expects a symbol name. We actually have a
2806 function name, without the leading underscore. Put the
2807 underscore back in, so that the caller gets a symbol name. */
2808 if (bfd_get_symbol_leading_char (abfd) == '\0')
2809 strcpy (buf, function);
2812 buf[0] = bfd_get_symbol_leading_char (abfd);
2813 strcpy (buf + 1, function);
2815 /* Have to remove : stuff. */
2816 colon = strchr (buf, ':');
2819 *functionname_ptr = buf;
2826 NAME (aout, sizeof_headers) (bfd *abfd,
2827 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2829 return adata (abfd).exec_bytes_size;
2832 /* Free all information we have cached for this BFD. We can always
2833 read it again later if we need it. */
2836 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2840 if (bfd_get_format (abfd) != bfd_object
2841 || abfd->tdata.aout_data == NULL)
2844 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2845 BFCI_FREE (obj_aout_symbols (abfd));
2847 obj_aout_external_syms (abfd) = 0;
2848 bfd_free_window (&obj_aout_sym_window (abfd));
2849 bfd_free_window (&obj_aout_string_window (abfd));
2850 obj_aout_external_strings (abfd) = 0;
2852 BFCI_FREE (obj_aout_external_syms (abfd));
2853 BFCI_FREE (obj_aout_external_strings (abfd));
2855 for (o = abfd->sections; o != NULL; o = o->next)
2856 BFCI_FREE (o->relocation);
2862 /* a.out link code. */
2864 /* Routine to create an entry in an a.out link hash table. */
2866 struct bfd_hash_entry *
2867 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2868 struct bfd_hash_table *table,
2871 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2873 /* Allocate the structure if it has not already been allocated by a
2876 ret = bfd_hash_allocate (table, sizeof (* ret));
2880 /* Call the allocation method of the superclass. */
2881 ret = ((struct aout_link_hash_entry *)
2882 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2886 /* Set local fields. */
2887 ret->written = FALSE;
2891 return (struct bfd_hash_entry *) ret;
2894 /* Initialize an a.out link hash table. */
2897 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2899 struct bfd_hash_entry *(*newfunc)
2900 (struct bfd_hash_entry *, struct bfd_hash_table *,
2902 unsigned int entsize)
2904 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2907 /* Create an a.out link hash table. */
2909 struct bfd_link_hash_table *
2910 NAME (aout, link_hash_table_create) (bfd *abfd)
2912 struct aout_link_hash_table *ret;
2913 bfd_size_type amt = sizeof (* ret);
2915 ret = bfd_malloc (amt);
2919 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2920 NAME (aout, link_hash_newfunc),
2921 sizeof (struct aout_link_hash_entry)))
2929 /* Add all symbols from an object file to the hash table. */
2932 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2934 bfd_boolean (*add_one_symbol)
2935 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2936 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2937 struct bfd_link_hash_entry **);
2938 struct external_nlist *syms;
2939 bfd_size_type sym_count;
2942 struct aout_link_hash_entry **sym_hash;
2943 struct external_nlist *p;
2944 struct external_nlist *pend;
2947 syms = obj_aout_external_syms (abfd);
2948 sym_count = obj_aout_external_sym_count (abfd);
2949 strings = obj_aout_external_strings (abfd);
2950 if (info->keep_memory)
2955 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2957 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2958 (abfd, info, &syms, &sym_count, &strings)))
2962 /* We keep a list of the linker hash table entries that correspond
2963 to particular symbols. We could just look them up in the hash
2964 table, but keeping the list is more efficient. Perhaps this
2965 should be conditional on info->keep_memory. */
2966 amt = sym_count * sizeof (struct aout_link_hash_entry *);
2967 sym_hash = bfd_alloc (abfd, amt);
2968 if (sym_hash == NULL && sym_count != 0)
2970 obj_aout_sym_hashes (abfd) = sym_hash;
2972 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
2973 if (add_one_symbol == NULL)
2974 add_one_symbol = _bfd_generic_link_add_one_symbol;
2977 pend = p + sym_count;
2978 for (; p < pend; p++, sym_hash++)
2989 type = H_GET_8 (abfd, p->e_type);
2991 /* Ignore debugging symbols. */
2992 if ((type & N_STAB) != 0)
2995 name = strings + GET_WORD (abfd, p->e_strx);
2996 value = GET_WORD (abfd, p->e_value);
3013 /* Ignore symbols that are not externally visible. */
3016 /* Ignore local indirect symbol. */
3021 case N_UNDF | N_EXT:
3024 section = bfd_und_section_ptr;
3028 section = bfd_com_section_ptr;
3031 section = bfd_abs_section_ptr;
3033 case N_TEXT | N_EXT:
3034 section = obj_textsec (abfd);
3035 value -= bfd_get_section_vma (abfd, section);
3037 case N_DATA | N_EXT:
3038 case N_SETV | N_EXT:
3039 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3040 translate_from_native_sym_flags. */
3041 section = obj_datasec (abfd);
3042 value -= bfd_get_section_vma (abfd, section);
3045 section = obj_bsssec (abfd);
3046 value -= bfd_get_section_vma (abfd, section);
3048 case N_INDR | N_EXT:
3049 /* An indirect symbol. The next symbol is the symbol
3050 which this one really is. */
3051 BFD_ASSERT (p + 1 < pend);
3053 string = strings + GET_WORD (abfd, p->e_strx);
3054 section = bfd_ind_section_ptr;
3055 flags |= BSF_INDIRECT;
3057 case N_COMM | N_EXT:
3058 section = bfd_com_section_ptr;
3060 case N_SETA: case N_SETA | N_EXT:
3061 section = bfd_abs_section_ptr;
3062 flags |= BSF_CONSTRUCTOR;
3064 case N_SETT: case N_SETT | N_EXT:
3065 section = obj_textsec (abfd);
3066 flags |= BSF_CONSTRUCTOR;
3067 value -= bfd_get_section_vma (abfd, section);
3069 case N_SETD: case N_SETD | N_EXT:
3070 section = obj_datasec (abfd);
3071 flags |= BSF_CONSTRUCTOR;
3072 value -= bfd_get_section_vma (abfd, section);
3074 case N_SETB: case N_SETB | N_EXT:
3075 section = obj_bsssec (abfd);
3076 flags |= BSF_CONSTRUCTOR;
3077 value -= bfd_get_section_vma (abfd, section);
3080 /* A warning symbol. The next symbol is the one to warn
3081 about. If there is no next symbol, just look away. */
3086 name = strings + GET_WORD (abfd, p->e_strx);
3087 section = bfd_und_section_ptr;
3088 flags |= BSF_WARNING;
3091 section = bfd_und_section_ptr;
3095 section = bfd_abs_section_ptr;
3099 section = obj_textsec (abfd);
3100 value -= bfd_get_section_vma (abfd, section);
3104 section = obj_datasec (abfd);
3105 value -= bfd_get_section_vma (abfd, section);
3109 section = obj_bsssec (abfd);
3110 value -= bfd_get_section_vma (abfd, section);
3115 if (! ((*add_one_symbol)
3116 (info, abfd, name, flags, section, value, string, copy, FALSE,
3117 (struct bfd_link_hash_entry **) sym_hash)))
3120 /* Restrict the maximum alignment of a common symbol based on
3121 the architecture, since a.out has no way to represent
3122 alignment requirements of a section in a .o file. FIXME:
3123 This isn't quite right: it should use the architecture of the
3124 output file, not the input files. */
3125 if ((*sym_hash)->root.type == bfd_link_hash_common
3126 && ((*sym_hash)->root.u.c.p->alignment_power >
3127 bfd_get_arch_info (abfd)->section_align_power))
3128 (*sym_hash)->root.u.c.p->alignment_power =
3129 bfd_get_arch_info (abfd)->section_align_power;
3131 /* If this is a set symbol, and we are not building sets, then
3132 it is possible for the hash entry to not have been set. In
3133 such a case, treat the symbol as not globally defined. */
3134 if ((*sym_hash)->root.type == bfd_link_hash_new)
3136 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3140 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3147 /* Free up the internal symbols read from an a.out file. */
3150 aout_link_free_symbols (bfd *abfd)
3152 if (obj_aout_external_syms (abfd) != NULL)
3155 bfd_free_window (&obj_aout_sym_window (abfd));
3157 free ((void *) obj_aout_external_syms (abfd));
3159 obj_aout_external_syms (abfd) = NULL;
3161 if (obj_aout_external_strings (abfd) != NULL)
3164 bfd_free_window (&obj_aout_string_window (abfd));
3166 free ((void *) obj_aout_external_strings (abfd));
3168 obj_aout_external_strings (abfd) = NULL;
3173 /* Add symbols from an a.out object file. */
3176 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3178 if (! aout_get_external_symbols (abfd))
3180 if (! aout_link_add_symbols (abfd, info))
3182 if (! info->keep_memory)
3184 if (! aout_link_free_symbols (abfd))
3190 /* Look through the internal symbols to see if this object file should
3191 be included in the link. We should include this object file if it
3192 defines any symbols which are currently undefined. If this object
3193 file defines a common symbol, then we may adjust the size of the
3194 known symbol but we do not include the object file in the link
3195 (unless there is some other reason to include it). */
3198 aout_link_check_ar_symbols (bfd *abfd,
3199 struct bfd_link_info *info,
3200 bfd_boolean *pneeded)
3202 struct external_nlist *p;
3203 struct external_nlist *pend;
3208 /* Look through all the symbols. */
3209 p = obj_aout_external_syms (abfd);
3210 pend = p + obj_aout_external_sym_count (abfd);
3211 strings = obj_aout_external_strings (abfd);
3212 for (; p < pend; p++)
3214 int type = H_GET_8 (abfd, p->e_type);
3216 struct bfd_link_hash_entry *h;
3218 /* Ignore symbols that are not externally visible. This is an
3219 optimization only, as we check the type more thoroughly
3221 if (((type & N_EXT) == 0
3222 || (type & N_STAB) != 0
3229 if (type == N_WARNING
3235 name = strings + GET_WORD (abfd, p->e_strx);
3236 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3238 /* We are only interested in symbols that are currently
3239 undefined or common. */
3241 || (h->type != bfd_link_hash_undefined
3242 && h->type != bfd_link_hash_common))
3244 if (type == (N_INDR | N_EXT))
3249 if (type == (N_TEXT | N_EXT)
3250 || type == (N_DATA | N_EXT)
3251 || type == (N_BSS | N_EXT)
3252 || type == (N_ABS | N_EXT)
3253 || type == (N_INDR | N_EXT))
3255 /* This object file defines this symbol. We must link it
3256 in. This is true regardless of whether the current
3257 definition of the symbol is undefined or common.
3259 If the current definition is common, we have a case in
3260 which we have already seen an object file including:
3262 and this object file from the archive includes:
3264 In such a case, whether to include this object is target
3265 dependant for backward compatibility.
3267 FIXME: The SunOS 4.1.3 linker will pull in the archive
3268 element if the symbol is defined in the .data section,
3269 but not if it is defined in the .text section. That
3270 seems a bit crazy to me, and it has not been implemented
3271 yet. However, it might be correct. */
3272 if (h->type == bfd_link_hash_common)
3276 switch (info->common_skip_ar_aymbols)
3278 case bfd_link_common_skip_text:
3279 skip = (type == (N_TEXT | N_EXT));
3281 case bfd_link_common_skip_data:
3282 skip = (type == (N_DATA | N_EXT));
3285 case bfd_link_common_skip_all:
3294 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3300 if (type == (N_UNDF | N_EXT))
3304 value = GET_WORD (abfd, p->e_value);
3307 /* This symbol is common in the object from the archive
3309 if (h->type == bfd_link_hash_undefined)
3314 symbfd = h->u.undef.abfd;
3317 /* This symbol was created as undefined from
3318 outside BFD. We assume that we should link
3319 in the object file. This is done for the -u
3320 option in the linker. */
3321 if (! (*info->callbacks->add_archive_element) (info,
3328 /* Turn the current link symbol into a common
3329 symbol. It is already on the undefs list. */
3330 h->type = bfd_link_hash_common;
3331 h->u.c.p = bfd_hash_allocate (&info->hash->table,
3332 sizeof (struct bfd_link_hash_common_entry));
3333 if (h->u.c.p == NULL)
3336 h->u.c.size = value;
3338 /* FIXME: This isn't quite right. The maximum
3339 alignment of a common symbol should be set by the
3340 architecture of the output file, not of the input
3342 power = bfd_log2 (value);
3343 if (power > bfd_get_arch_info (abfd)->section_align_power)
3344 power = bfd_get_arch_info (abfd)->section_align_power;
3345 h->u.c.p->alignment_power = power;
3347 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3352 /* Adjust the size of the common symbol if
3354 if (value > h->u.c.size)
3355 h->u.c.size = value;
3365 /* This symbol is weak but defined. We must pull it in if
3366 the current link symbol is undefined, but we don't want
3367 it if the current link symbol is common. */
3368 if (h->type == bfd_link_hash_undefined)
3370 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3378 /* We do not need this object file. */
3381 /* Check a single archive element to see if we need to include it in
3382 the link. *PNEEDED is set according to whether this element is
3383 needed in the link or not. This is called from
3384 _bfd_generic_link_add_archive_symbols. */
3387 aout_link_check_archive_element (bfd *abfd,
3388 struct bfd_link_info *info,
3389 bfd_boolean *pneeded)
3391 if (! aout_get_external_symbols (abfd))
3394 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3399 if (! aout_link_add_symbols (abfd, info))
3403 if (! info->keep_memory || ! *pneeded)
3405 if (! aout_link_free_symbols (abfd))
3412 /* Given an a.out BFD, add symbols to the global hash table as
3416 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3418 switch (bfd_get_format (abfd))
3421 return aout_link_add_object_symbols (abfd, info);
3423 return _bfd_generic_link_add_archive_symbols
3424 (abfd, info, aout_link_check_archive_element);
3426 bfd_set_error (bfd_error_wrong_format);
3431 /* A hash table used for header files with N_BINCL entries. */
3433 struct aout_link_includes_table
3435 struct bfd_hash_table root;
3438 /* A linked list of totals that we have found for a particular header
3441 struct aout_link_includes_totals
3443 struct aout_link_includes_totals *next;
3447 /* An entry in the header file hash table. */
3449 struct aout_link_includes_entry
3451 struct bfd_hash_entry root;
3452 /* List of totals we have found for this file. */
3453 struct aout_link_includes_totals *totals;
3456 /* Look up an entry in an the header file hash table. */
3458 #define aout_link_includes_lookup(table, string, create, copy) \
3459 ((struct aout_link_includes_entry *) \
3460 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3462 /* During the final link step we need to pass around a bunch of
3463 information, so we do it in an instance of this structure. */
3465 struct aout_final_link_info
3467 /* General link information. */
3468 struct bfd_link_info *info;
3471 /* Reloc file positions. */
3472 file_ptr treloff, dreloff;
3473 /* File position of symbols. */
3476 struct bfd_strtab_hash *strtab;
3477 /* Header file hash table. */
3478 struct aout_link_includes_table includes;
3479 /* A buffer large enough to hold the contents of any section. */
3481 /* A buffer large enough to hold the relocs of any section. */
3483 /* A buffer large enough to hold the symbol map of any input BFD. */
3485 /* A buffer large enough to hold output symbols of any input BFD. */
3486 struct external_nlist *output_syms;
3489 /* The function to create a new entry in the header file hash table. */
3491 static struct bfd_hash_entry *
3492 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3493 struct bfd_hash_table *table,
3496 struct aout_link_includes_entry *ret =
3497 (struct aout_link_includes_entry *) entry;
3499 /* Allocate the structure if it has not already been allocated by a
3502 ret = bfd_hash_allocate (table, sizeof (* ret));
3506 /* Call the allocation method of the superclass. */
3507 ret = ((struct aout_link_includes_entry *)
3508 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3511 /* Set local fields. */
3515 return (struct bfd_hash_entry *) ret;
3518 /* Write out a symbol that was not associated with an a.out input
3522 aout_link_write_other_symbol (struct aout_link_hash_entry *h, void * data)
3524 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
3528 struct external_nlist outsym;
3532 if (h->root.type == bfd_link_hash_warning)
3534 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3535 if (h->root.type == bfd_link_hash_new)
3539 output_bfd = finfo->output_bfd;
3541 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3543 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3544 (output_bfd, finfo->info, h)))
3546 /* FIXME: No way to handle errors. */
3556 /* An indx of -2 means the symbol must be written. */
3558 && (finfo->info->strip == strip_all
3559 || (finfo->info->strip == strip_some
3560 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
3561 FALSE, FALSE) == NULL)))
3564 switch (h->root.type)
3567 case bfd_link_hash_warning:
3569 /* Avoid variable not initialized warnings. */
3571 case bfd_link_hash_new:
3572 /* This can happen for set symbols when sets are not being
3575 case bfd_link_hash_undefined:
3576 type = N_UNDF | N_EXT;
3579 case bfd_link_hash_defined:
3580 case bfd_link_hash_defweak:
3584 sec = h->root.u.def.section->output_section;
3585 BFD_ASSERT (bfd_is_abs_section (sec)
3586 || sec->owner == output_bfd);
3587 if (sec == obj_textsec (output_bfd))
3588 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3589 else if (sec == obj_datasec (output_bfd))
3590 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3591 else if (sec == obj_bsssec (output_bfd))
3592 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3594 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3596 val = (h->root.u.def.value
3598 + h->root.u.def.section->output_offset);
3601 case bfd_link_hash_common:
3602 type = N_UNDF | N_EXT;
3603 val = h->root.u.c.size;
3605 case bfd_link_hash_undefweak:
3608 case bfd_link_hash_indirect:
3609 /* We ignore these symbols, since the indirected symbol is
3610 already in the hash table. */
3614 H_PUT_8 (output_bfd, type, outsym.e_type);
3615 H_PUT_8 (output_bfd, 0, outsym.e_other);
3616 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3617 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
3619 if (indx == - (bfd_size_type) 1)
3620 /* FIXME: No way to handle errors. */
3623 PUT_WORD (output_bfd, indx, outsym.e_strx);
3624 PUT_WORD (output_bfd, val, outsym.e_value);
3626 amt = EXTERNAL_NLIST_SIZE;
3627 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
3628 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3629 /* FIXME: No way to handle errors. */
3632 finfo->symoff += EXTERNAL_NLIST_SIZE;
3633 h->indx = obj_aout_external_sym_count (output_bfd);
3634 ++obj_aout_external_sym_count (output_bfd);
3639 /* Handle a link order which is supposed to generate a reloc. */
3642 aout_link_reloc_link_order (struct aout_final_link_info *finfo,
3644 struct bfd_link_order *p)
3646 struct bfd_link_order_reloc *pr;
3649 reloc_howto_type *howto;
3650 file_ptr *reloff_ptr = NULL;
3651 struct reloc_std_external srel;
3652 struct reloc_ext_external erel;
3658 if (p->type == bfd_section_reloc_link_order)
3661 if (bfd_is_abs_section (pr->u.section))
3662 r_index = N_ABS | N_EXT;
3665 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
3666 r_index = pr->u.section->target_index;
3671 struct aout_link_hash_entry *h;
3673 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3675 h = ((struct aout_link_hash_entry *)
3676 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
3677 pr->u.name, FALSE, FALSE, TRUE));
3683 /* We decided to strip this symbol, but it turns out that we
3684 can't. Note that we lose the other and desc information
3685 here. I don't think that will ever matter for a global
3689 if (! aout_link_write_other_symbol (h, (void *) finfo))
3695 if (! ((*finfo->info->callbacks->unattached_reloc)
3696 (finfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0)))
3702 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
3705 bfd_set_error (bfd_error_bad_value);
3709 if (o == obj_textsec (finfo->output_bfd))
3710 reloff_ptr = &finfo->treloff;
3711 else if (o == obj_datasec (finfo->output_bfd))
3712 reloff_ptr = &finfo->dreloff;
3716 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
3719 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto,
3729 r_pcrel = (int) howto->pc_relative;
3730 r_baserel = (howto->type & 8) != 0;
3731 r_jmptable = (howto->type & 16) != 0;
3732 r_relative = (howto->type & 32) != 0;
3733 r_length = howto->size;
3735 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
3736 if (bfd_header_big_endian (finfo->output_bfd))
3738 srel.r_index[0] = r_index >> 16;
3739 srel.r_index[1] = r_index >> 8;
3740 srel.r_index[2] = r_index;
3742 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3743 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3744 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3745 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3746 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3747 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3751 srel.r_index[2] = r_index >> 16;
3752 srel.r_index[1] = r_index >> 8;
3753 srel.r_index[0] = r_index;
3755 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3756 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3757 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3758 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3759 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3760 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3764 rel_ptr = (void *) &srel;
3766 /* We have to write the addend into the object file, since
3767 standard a.out relocs are in place. It would be more
3768 reliable if we had the current contents of the file here,
3769 rather than assuming zeroes, but we can't read the file since
3770 it was opened using bfd_openw. */
3771 if (pr->addend != 0)
3774 bfd_reloc_status_type r;
3778 size = bfd_get_reloc_size (howto);
3779 buf = bfd_zmalloc (size);
3782 r = MY_relocate_contents (howto, finfo->output_bfd,
3783 (bfd_vma) pr->addend, buf);
3789 case bfd_reloc_outofrange:
3791 case bfd_reloc_overflow:
3792 if (! ((*finfo->info->callbacks->reloc_overflow)
3794 (p->type == bfd_section_reloc_link_order
3795 ? bfd_section_name (finfo->output_bfd,
3798 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0)))
3805 ok = bfd_set_section_contents (finfo->output_bfd, o, (void *) buf,
3806 (file_ptr) p->offset, size);
3814 #ifdef MY_put_ext_reloc
3815 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
3816 howto, &erel, pr->addend);
3818 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
3820 if (bfd_header_big_endian (finfo->output_bfd))
3822 erel.r_index[0] = r_index >> 16;
3823 erel.r_index[1] = r_index >> 8;
3824 erel.r_index[2] = r_index;
3826 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3827 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3831 erel.r_index[2] = r_index >> 16;
3832 erel.r_index[1] = r_index >> 8;
3833 erel.r_index[0] = r_index;
3835 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3836 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3839 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3840 #endif /* MY_put_ext_reloc */
3842 rel_ptr = (void *) &erel;
3845 amt = obj_reloc_entry_size (finfo->output_bfd);
3846 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3847 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt)
3850 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
3852 /* Assert that the relocs have not run into the symbols, and that n
3853 the text relocs have not run into the data relocs. */
3854 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
3855 && (reloff_ptr != &finfo->treloff
3857 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
3862 /* Get the section corresponding to a reloc index. */
3864 static INLINE asection *
3865 aout_reloc_index_to_section (bfd *abfd, int indx)
3867 switch (indx & N_TYPE)
3869 case N_TEXT: return obj_textsec (abfd);
3870 case N_DATA: return obj_datasec (abfd);
3871 case N_BSS: return obj_bsssec (abfd);
3873 case N_UNDF: return bfd_abs_section_ptr;
3879 /* Relocate an a.out section using standard a.out relocs. */
3882 aout_link_input_section_std (struct aout_final_link_info *finfo,
3884 asection *input_section,
3885 struct reloc_std_external *relocs,
3886 bfd_size_type rel_size,
3889 bfd_boolean (*check_dynamic_reloc)
3890 (struct bfd_link_info *, bfd *, asection *,
3891 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3894 bfd_boolean relocatable;
3895 struct external_nlist *syms;
3897 struct aout_link_hash_entry **sym_hashes;
3899 bfd_size_type reloc_count;
3900 struct reloc_std_external *rel;
3901 struct reloc_std_external *rel_end;
3903 output_bfd = finfo->output_bfd;
3904 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3906 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3907 BFD_ASSERT (input_bfd->xvec->header_byteorder
3908 == output_bfd->xvec->header_byteorder);
3910 relocatable = finfo->info->relocatable;
3911 syms = obj_aout_external_syms (input_bfd);
3912 strings = obj_aout_external_strings (input_bfd);
3913 sym_hashes = obj_aout_sym_hashes (input_bfd);
3914 symbol_map = finfo->symbol_map;
3916 reloc_count = rel_size / RELOC_STD_SIZE;
3918 rel_end = rel + reloc_count;
3919 for (; rel < rel_end; rel++)
3926 reloc_howto_type *howto;
3927 struct aout_link_hash_entry *h = NULL;
3929 bfd_reloc_status_type r;
3931 r_addr = GET_SWORD (input_bfd, rel->r_address);
3933 #ifdef MY_reloc_howto
3934 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
3940 unsigned int howto_idx;
3942 if (bfd_header_big_endian (input_bfd))
3944 r_index = (((unsigned int) rel->r_index[0] << 16)
3945 | ((unsigned int) rel->r_index[1] << 8)
3947 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
3948 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
3949 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
3950 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
3951 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
3952 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
3953 >> RELOC_STD_BITS_LENGTH_SH_BIG);
3957 r_index = (((unsigned int) rel->r_index[2] << 16)
3958 | ((unsigned int) rel->r_index[1] << 8)
3960 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
3961 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
3962 r_baserel = (0 != (rel->r_type[0]
3963 & RELOC_STD_BITS_BASEREL_LITTLE));
3964 r_jmptable= (0 != (rel->r_type[0]
3965 & RELOC_STD_BITS_JMPTABLE_LITTLE));
3966 r_relative= (0 != (rel->r_type[0]
3967 & RELOC_STD_BITS_RELATIVE_LITTLE));
3968 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
3969 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
3972 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
3973 + 16 * r_jmptable + 32 * r_relative);
3974 if (howto_idx < TABLE_SIZE (howto_table_std))
3975 howto = howto_table_std + howto_idx;
3983 (*finfo->info->callbacks->einfo)
3984 (_("%P: %B: unexpected relocation type\n"), input_bfd);
3985 bfd_set_error (bfd_error_bad_value);
3991 /* We are generating a relocatable output file, and must
3992 modify the reloc accordingly. */
3995 /* If we know the symbol this relocation is against,
3996 convert it into a relocation against a section. This
3997 is what the native linker does. */
3998 h = sym_hashes[r_index];
4000 && (h->root.type == bfd_link_hash_defined
4001 || h->root.type == bfd_link_hash_defweak))
4003 asection *output_section;
4005 /* Change the r_extern value. */
4006 if (bfd_header_big_endian (output_bfd))
4007 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4009 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4011 /* Compute a new r_index. */
4012 output_section = h->root.u.def.section->output_section;
4013 if (output_section == obj_textsec (output_bfd))
4015 else if (output_section == obj_datasec (output_bfd))
4017 else if (output_section == obj_bsssec (output_bfd))
4022 /* Add the symbol value and the section VMA to the
4023 addend stored in the contents. */
4024 relocation = (h->root.u.def.value
4025 + output_section->vma
4026 + h->root.u.def.section->output_offset);
4030 /* We must change r_index according to the symbol
4032 r_index = symbol_map[r_index];
4038 /* We decided to strip this symbol, but it
4039 turns out that we can't. Note that we
4040 lose the other and desc information here.
4041 I don't think that will ever matter for a
4047 if (! aout_link_write_other_symbol (h,
4057 name = strings + GET_WORD (input_bfd,
4058 syms[r_index].e_strx);
4059 if (! ((*finfo->info->callbacks->unattached_reloc)
4060 (finfo->info, name, input_bfd, input_section,
4070 /* Write out the new r_index value. */
4071 if (bfd_header_big_endian (output_bfd))
4073 rel->r_index[0] = r_index >> 16;
4074 rel->r_index[1] = r_index >> 8;
4075 rel->r_index[2] = r_index;
4079 rel->r_index[2] = r_index >> 16;
4080 rel->r_index[1] = r_index >> 8;
4081 rel->r_index[0] = r_index;
4088 /* This is a relocation against a section. We must
4089 adjust by the amount that the section moved. */
4090 section = aout_reloc_index_to_section (input_bfd, r_index);
4091 relocation = (section->output_section->vma
4092 + section->output_offset
4096 /* Change the address of the relocation. */
4097 PUT_WORD (output_bfd,
4098 r_addr + input_section->output_offset,
4101 /* Adjust a PC relative relocation by removing the reference
4102 to the original address in the section and including the
4103 reference to the new address. */
4105 relocation -= (input_section->output_section->vma
4106 + input_section->output_offset
4107 - input_section->vma);
4109 #ifdef MY_relocatable_reloc
4110 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4113 if (relocation == 0)
4116 r = MY_relocate_contents (howto,
4117 input_bfd, relocation,
4124 /* We are generating an executable, and must do a full
4130 h = sym_hashes[r_index];
4133 && (h->root.type == bfd_link_hash_defined
4134 || h->root.type == bfd_link_hash_defweak))
4136 relocation = (h->root.u.def.value
4137 + h->root.u.def.section->output_section->vma
4138 + h->root.u.def.section->output_offset);
4141 && h->root.type == bfd_link_hash_undefweak)
4153 section = aout_reloc_index_to_section (input_bfd, r_index);
4154 relocation = (section->output_section->vma
4155 + section->output_offset
4158 relocation += input_section->vma;
4161 if (check_dynamic_reloc != NULL)
4165 if (! ((*check_dynamic_reloc)
4166 (finfo->info, input_bfd, input_section, h,
4167 (void *) rel, contents, &skip, &relocation)))
4173 /* Now warn if a global symbol is undefined. We could not
4174 do this earlier, because check_dynamic_reloc might want
4175 to skip this reloc. */
4176 if (hundef && ! finfo->info->shared && ! r_baserel)
4181 name = h->root.root.string;
4183 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4184 if (! ((*finfo->info->callbacks->undefined_symbol)
4185 (finfo->info, name, input_bfd, input_section,
4190 r = MY_final_link_relocate (howto,
4191 input_bfd, input_section,
4192 contents, r_addr, relocation,
4196 if (r != bfd_reloc_ok)
4201 case bfd_reloc_outofrange:
4203 case bfd_reloc_overflow:
4210 name = strings + GET_WORD (input_bfd,
4211 syms[r_index].e_strx);
4216 s = aout_reloc_index_to_section (input_bfd, r_index);
4217 name = bfd_section_name (input_bfd, s);
4219 if (! ((*finfo->info->callbacks->reloc_overflow)
4220 (finfo->info, (h ? &h->root : NULL), name,
4221 howto->name, (bfd_vma) 0, input_bfd,
4222 input_section, r_addr)))
4233 /* Relocate an a.out section using extended a.out relocs. */
4236 aout_link_input_section_ext (struct aout_final_link_info *finfo,
4238 asection *input_section,
4239 struct reloc_ext_external *relocs,
4240 bfd_size_type rel_size,
4243 bfd_boolean (*check_dynamic_reloc)
4244 (struct bfd_link_info *, bfd *, asection *,
4245 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4248 bfd_boolean relocatable;
4249 struct external_nlist *syms;
4251 struct aout_link_hash_entry **sym_hashes;
4253 bfd_size_type reloc_count;
4254 struct reloc_ext_external *rel;
4255 struct reloc_ext_external *rel_end;
4257 output_bfd = finfo->output_bfd;
4258 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4260 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4261 BFD_ASSERT (input_bfd->xvec->header_byteorder
4262 == output_bfd->xvec->header_byteorder);
4264 relocatable = finfo->info->relocatable;
4265 syms = obj_aout_external_syms (input_bfd);
4266 strings = obj_aout_external_strings (input_bfd);
4267 sym_hashes = obj_aout_sym_hashes (input_bfd);
4268 symbol_map = finfo->symbol_map;
4270 reloc_count = rel_size / RELOC_EXT_SIZE;
4272 rel_end = rel + reloc_count;
4273 for (; rel < rel_end; rel++)
4278 unsigned int r_type;
4280 struct aout_link_hash_entry *h = NULL;
4281 asection *r_section = NULL;
4284 r_addr = GET_SWORD (input_bfd, rel->r_address);
4286 if (bfd_header_big_endian (input_bfd))
4288 r_index = (((unsigned int) rel->r_index[0] << 16)
4289 | ((unsigned int) rel->r_index[1] << 8)
4291 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4292 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4293 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4297 r_index = (((unsigned int) rel->r_index[2] << 16)
4298 | ((unsigned int) rel->r_index[1] << 8)
4300 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4301 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4302 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4305 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4307 if (r_type >= TABLE_SIZE (howto_table_ext))
4309 (*finfo->info->callbacks->einfo)
4310 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4311 bfd_set_error (bfd_error_bad_value);
4317 /* We are generating a relocatable output file, and must
4318 modify the reloc accordingly. */
4320 || r_type == (unsigned int) RELOC_BASE10
4321 || r_type == (unsigned int) RELOC_BASE13
4322 || r_type == (unsigned int) RELOC_BASE22)
4324 /* If we know the symbol this relocation is against,
4325 convert it into a relocation against a section. This
4326 is what the native linker does. */
4327 if (r_type == (unsigned int) RELOC_BASE10
4328 || r_type == (unsigned int) RELOC_BASE13
4329 || r_type == (unsigned int) RELOC_BASE22)
4332 h = sym_hashes[r_index];
4334 && (h->root.type == bfd_link_hash_defined
4335 || h->root.type == bfd_link_hash_defweak))
4337 asection *output_section;
4339 /* Change the r_extern value. */
4340 if (bfd_header_big_endian (output_bfd))
4341 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4343 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4345 /* Compute a new r_index. */
4346 output_section = h->root.u.def.section->output_section;
4347 if (output_section == obj_textsec (output_bfd))
4349 else if (output_section == obj_datasec (output_bfd))
4351 else if (output_section == obj_bsssec (output_bfd))
4356 /* Add the symbol value and the section VMA to the
4358 relocation = (h->root.u.def.value
4359 + output_section->vma
4360 + h->root.u.def.section->output_offset);
4362 /* Now RELOCATION is the VMA of the final
4363 destination. If this is a PC relative reloc,
4364 then ADDEND is the negative of the source VMA.
4365 We want to set ADDEND to the difference between
4366 the destination VMA and the source VMA, which
4367 means we must adjust RELOCATION by the change in
4368 the source VMA. This is done below. */
4372 /* We must change r_index according to the symbol
4374 r_index = symbol_map[r_index];
4380 /* We decided to strip this symbol, but it
4381 turns out that we can't. Note that we
4382 lose the other and desc information here.
4383 I don't think that will ever matter for a
4389 if (! aout_link_write_other_symbol (h,
4399 name = strings + GET_WORD (input_bfd,
4400 syms[r_index].e_strx);
4401 if (! ((*finfo->info->callbacks->unattached_reloc)
4402 (finfo->info, name, input_bfd, input_section,
4411 /* If this is a PC relative reloc, then the addend
4412 is the negative of the source VMA. We must
4413 adjust it by the change in the source VMA. This
4417 /* Write out the new r_index value. */
4418 if (bfd_header_big_endian (output_bfd))
4420 rel->r_index[0] = r_index >> 16;
4421 rel->r_index[1] = r_index >> 8;
4422 rel->r_index[2] = r_index;
4426 rel->r_index[2] = r_index >> 16;
4427 rel->r_index[1] = r_index >> 8;
4428 rel->r_index[0] = r_index;
4433 /* This is a relocation against a section. We must
4434 adjust by the amount that the section moved. */
4435 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4436 relocation = (r_section->output_section->vma
4437 + r_section->output_offset
4440 /* If this is a PC relative reloc, then the addend is
4441 the difference in VMA between the destination and the
4442 source. We have just adjusted for the change in VMA
4443 of the destination, so we must also adjust by the
4444 change in VMA of the source. This is done below. */
4447 /* As described above, we must always adjust a PC relative
4448 reloc by the change in VMA of the source. However, if
4449 pcrel_offset is set, then the addend does not include the
4450 location within the section, in which case we don't need
4451 to adjust anything. */
4452 if (howto_table_ext[r_type].pc_relative
4453 && ! howto_table_ext[r_type].pcrel_offset)
4454 relocation -= (input_section->output_section->vma
4455 + input_section->output_offset
4456 - input_section->vma);
4458 /* Change the addend if necessary. */
4459 if (relocation != 0)
4460 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4462 /* Change the address of the relocation. */
4463 PUT_WORD (output_bfd,
4464 r_addr + input_section->output_offset,
4470 bfd_reloc_status_type r;
4472 /* We are generating an executable, and must do a full
4478 h = sym_hashes[r_index];
4481 && (h->root.type == bfd_link_hash_defined
4482 || h->root.type == bfd_link_hash_defweak))
4484 relocation = (h->root.u.def.value
4485 + h->root.u.def.section->output_section->vma
4486 + h->root.u.def.section->output_offset);
4489 && h->root.type == bfd_link_hash_undefweak)
4497 else if (r_type == (unsigned int) RELOC_BASE10
4498 || r_type == (unsigned int) RELOC_BASE13
4499 || r_type == (unsigned int) RELOC_BASE22)
4501 struct external_nlist *sym;
4504 /* For base relative relocs, r_index is always an index
4505 into the symbol table, even if r_extern is 0. */
4506 sym = syms + r_index;
4507 type = H_GET_8 (input_bfd, sym->e_type);
4508 if ((type & N_TYPE) == N_TEXT
4510 r_section = obj_textsec (input_bfd);
4511 else if ((type & N_TYPE) == N_DATA
4513 r_section = obj_datasec (input_bfd);
4514 else if ((type & N_TYPE) == N_BSS
4516 r_section = obj_bsssec (input_bfd);
4517 else if ((type & N_TYPE) == N_ABS
4519 r_section = bfd_abs_section_ptr;
4522 relocation = (r_section->output_section->vma
4523 + r_section->output_offset
4524 + (GET_WORD (input_bfd, sym->e_value)
4529 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4531 /* If this is a PC relative reloc, then R_ADDEND is the
4532 difference between the two vmas, or
4533 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4535 old_dest_sec == section->vma
4537 old_src_sec == input_section->vma
4539 old_src_off == r_addr
4541 _bfd_final_link_relocate expects RELOCATION +
4542 R_ADDEND to be the VMA of the destination minus
4543 r_addr (the minus r_addr is because this relocation
4544 is not pcrel_offset, which is a bit confusing and
4545 should, perhaps, be changed), or
4548 new_dest_sec == output_section->vma + output_offset
4549 We arrange for this to happen by setting RELOCATION to
4550 new_dest_sec + old_src_sec - old_dest_sec
4552 If this is not a PC relative reloc, then R_ADDEND is
4553 simply the VMA of the destination, so we set
4554 RELOCATION to the change in the destination VMA, or
4555 new_dest_sec - old_dest_sec
4557 relocation = (r_section->output_section->vma
4558 + r_section->output_offset
4560 if (howto_table_ext[r_type].pc_relative)
4561 relocation += input_section->vma;
4564 if (check_dynamic_reloc != NULL)
4568 if (! ((*check_dynamic_reloc)
4569 (finfo->info, input_bfd, input_section, h,
4570 (void *) rel, contents, &skip, &relocation)))
4576 /* Now warn if a global symbol is undefined. We could not
4577 do this earlier, because check_dynamic_reloc might want
4578 to skip this reloc. */
4580 && ! finfo->info->shared
4581 && r_type != (unsigned int) RELOC_BASE10
4582 && r_type != (unsigned int) RELOC_BASE13
4583 && r_type != (unsigned int) RELOC_BASE22)
4588 name = h->root.root.string;
4590 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4591 if (! ((*finfo->info->callbacks->undefined_symbol)
4592 (finfo->info, name, input_bfd, input_section,
4597 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4598 r = MY_final_link_relocate (howto_table_ext + r_type,
4599 input_bfd, input_section,
4600 contents, r_addr, relocation,
4606 x = bfd_get_32 (input_bfd, contents + r_addr);
4607 x = x + relocation + r_addend;
4608 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4612 if (r != bfd_reloc_ok)
4617 case bfd_reloc_outofrange:
4619 case bfd_reloc_overflow:
4626 || r_type == (unsigned int) RELOC_BASE10
4627 || r_type == (unsigned int) RELOC_BASE13
4628 || r_type == (unsigned int) RELOC_BASE22)
4629 name = strings + GET_WORD (input_bfd,
4630 syms[r_index].e_strx);
4635 s = aout_reloc_index_to_section (input_bfd, r_index);
4636 name = bfd_section_name (input_bfd, s);
4638 if (! ((*finfo->info->callbacks->reloc_overflow)
4639 (finfo->info, (h ? &h->root : NULL), name,
4640 howto_table_ext[r_type].name,
4641 r_addend, input_bfd, input_section, r_addr)))
4653 /* Link an a.out section into the output file. */
4656 aout_link_input_section (struct aout_final_link_info *finfo,
4658 asection *input_section,
4659 file_ptr *reloff_ptr,
4660 bfd_size_type rel_size)
4662 bfd_size_type input_size;
4665 /* Get the section contents. */
4666 input_size = input_section->size;
4667 if (! bfd_get_section_contents (input_bfd, input_section,
4668 (void *) finfo->contents,
4669 (file_ptr) 0, input_size))
4672 /* Read in the relocs if we haven't already done it. */
4673 if (aout_section_data (input_section) != NULL
4674 && aout_section_data (input_section)->relocs != NULL)
4675 relocs = aout_section_data (input_section)->relocs;
4678 relocs = finfo->relocs;
4681 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4682 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4687 /* Relocate the section contents. */
4688 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4690 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4691 (struct reloc_std_external *) relocs,
4692 rel_size, finfo->contents))
4697 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4698 (struct reloc_ext_external *) relocs,
4699 rel_size, finfo->contents))
4703 /* Write out the section contents. */
4704 if (! bfd_set_section_contents (finfo->output_bfd,
4705 input_section->output_section,
4706 (void *) finfo->contents,
4707 (file_ptr) input_section->output_offset,
4711 /* If we are producing relocatable output, the relocs were
4712 modified, and we now write them out. */
4713 if (finfo->info->relocatable && rel_size > 0)
4715 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4717 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size)
4719 *reloff_ptr += rel_size;
4721 /* Assert that the relocs have not run into the symbols, and
4722 that if these are the text relocs they have not run into the
4724 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4725 && (reloff_ptr != &finfo->treloff
4727 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4733 /* Adjust and write out the symbols for an a.out file. Set the new
4734 symbol indices into a symbol_map. */
4737 aout_link_write_symbols (struct aout_final_link_info *finfo, bfd *input_bfd)
4740 bfd_size_type sym_count;
4742 enum bfd_link_strip strip;
4743 enum bfd_link_discard discard;
4744 struct external_nlist *outsym;
4745 bfd_size_type strtab_index;
4746 struct external_nlist *sym;
4747 struct external_nlist *sym_end;
4748 struct aout_link_hash_entry **sym_hash;
4751 bfd_boolean skip_next;
4753 output_bfd = finfo->output_bfd;
4754 sym_count = obj_aout_external_sym_count (input_bfd);
4755 strings = obj_aout_external_strings (input_bfd);
4756 strip = finfo->info->strip;
4757 discard = finfo->info->discard;
4758 outsym = finfo->output_syms;
4760 /* First write out a symbol for this object file, unless we are
4761 discarding such symbols. */
4762 if (strip != strip_all
4763 && (strip != strip_some
4764 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4765 FALSE, FALSE) != NULL)
4766 && discard != discard_all)
4768 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4769 H_PUT_8 (output_bfd, 0, outsym->e_other);
4770 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4771 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4772 input_bfd->filename, FALSE);
4773 if (strtab_index == (bfd_size_type) -1)
4775 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4776 PUT_WORD (output_bfd,
4777 (bfd_get_section_vma (output_bfd,
4778 obj_textsec (input_bfd)->output_section)
4779 + obj_textsec (input_bfd)->output_offset),
4781 ++obj_aout_external_sym_count (output_bfd);
4787 sym = obj_aout_external_syms (input_bfd);
4788 sym_end = sym + sym_count;
4789 sym_hash = obj_aout_sym_hashes (input_bfd);
4790 symbol_map = finfo->symbol_map;
4791 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4792 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4796 struct aout_link_hash_entry *h;
4802 /* We set *symbol_map to 0 above for all symbols. If it has
4803 already been set to -1 for this symbol, it means that we are
4804 discarding it because it appears in a duplicate header file.
4805 See the N_BINCL code below. */
4806 if (*symbol_map == -1)
4809 /* Initialize *symbol_map to -1, which means that the symbol was
4810 not copied into the output file. We will change it later if
4811 we do copy the symbol over. */
4814 type = H_GET_8 (input_bfd, sym->e_type);
4815 name = strings + GET_WORD (input_bfd, sym->e_strx);
4821 /* Pass this symbol through. It is the target of an
4822 indirect or warning symbol. */
4823 val = GET_WORD (input_bfd, sym->e_value);
4828 /* Skip this symbol, which is the target of an indirect
4829 symbol that we have changed to no longer be an indirect
4836 struct aout_link_hash_entry *hresolve;
4838 /* We have saved the hash table entry for this symbol, if
4839 there is one. Note that we could just look it up again
4840 in the hash table, provided we first check that it is an
4844 /* Use the name from the hash table, in case the symbol was
4847 && h->root.type != bfd_link_hash_warning)
4848 name = h->root.root.string;
4850 /* If this is an indirect or warning symbol, then change
4851 hresolve to the base symbol. We also change *sym_hash so
4852 that the relocation routines relocate against the real
4855 if (h != (struct aout_link_hash_entry *) NULL
4856 && (h->root.type == bfd_link_hash_indirect
4857 || h->root.type == bfd_link_hash_warning))
4859 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4860 while (hresolve->root.type == bfd_link_hash_indirect
4861 || hresolve->root.type == bfd_link_hash_warning)
4862 hresolve = ((struct aout_link_hash_entry *)
4863 hresolve->root.u.i.link);
4864 *sym_hash = hresolve;
4867 /* If the symbol has already been written out, skip it. */
4871 if ((type & N_TYPE) == N_INDR
4872 || type == N_WARNING)
4874 *symbol_map = h->indx;
4878 /* See if we are stripping this symbol. */
4884 case strip_debugger:
4885 if ((type & N_STAB) != 0)
4889 if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE)
4904 /* Get the value of the symbol. */
4905 if ((type & N_TYPE) == N_TEXT
4907 symsec = obj_textsec (input_bfd);
4908 else if ((type & N_TYPE) == N_DATA
4910 symsec = obj_datasec (input_bfd);
4911 else if ((type & N_TYPE) == N_BSS
4913 symsec = obj_bsssec (input_bfd);
4914 else if ((type & N_TYPE) == N_ABS
4916 symsec = bfd_abs_section_ptr;
4917 else if (((type & N_TYPE) == N_INDR
4918 && (hresolve == NULL
4919 || (hresolve->root.type != bfd_link_hash_defined
4920 && hresolve->root.type != bfd_link_hash_defweak
4921 && hresolve->root.type != bfd_link_hash_common)))
4922 || type == N_WARNING)
4924 /* Pass the next symbol through unchanged. The
4925 condition above for indirect symbols is so that if
4926 the indirect symbol was defined, we output it with
4927 the correct definition so the debugger will
4930 val = GET_WORD (input_bfd, sym->e_value);
4933 else if ((type & N_STAB) != 0)
4935 val = GET_WORD (input_bfd, sym->e_value);
4940 /* If we get here with an indirect symbol, it means that
4941 we are outputting it with a real definition. In such
4942 a case we do not want to output the next symbol,
4943 which is the target of the indirection. */
4944 if ((type & N_TYPE) == N_INDR)
4949 /* We need to get the value from the hash table. We use
4950 hresolve so that if we have defined an indirect
4951 symbol we output the final definition. */
4954 switch (type & N_TYPE)
4957 symsec = obj_textsec (input_bfd);
4960 symsec = obj_datasec (input_bfd);
4963 symsec = obj_bsssec (input_bfd);
4966 symsec = bfd_abs_section_ptr;
4973 else if (hresolve->root.type == bfd_link_hash_defined
4974 || hresolve->root.type == bfd_link_hash_defweak)
4976 asection *input_section;
4977 asection *output_section;
4979 /* This case usually means a common symbol which was
4980 turned into a defined symbol. */
4981 input_section = hresolve->root.u.def.section;
4982 output_section = input_section->output_section;
4983 BFD_ASSERT (bfd_is_abs_section (output_section)
4984 || output_section->owner == output_bfd);
4985 val = (hresolve->root.u.def.value
4986 + bfd_get_section_vma (output_bfd, output_section)
4987 + input_section->output_offset);
4989 /* Get the correct type based on the section. If
4990 this is a constructed set, force it to be
4991 globally visible. */
5000 if (output_section == obj_textsec (output_bfd))
5001 type |= (hresolve->root.type == bfd_link_hash_defined
5004 else if (output_section == obj_datasec (output_bfd))
5005 type |= (hresolve->root.type == bfd_link_hash_defined
5008 else if (output_section == obj_bsssec (output_bfd))
5009 type |= (hresolve->root.type == bfd_link_hash_defined
5013 type |= (hresolve->root.type == bfd_link_hash_defined
5017 else if (hresolve->root.type == bfd_link_hash_common)
5018 val = hresolve->root.u.c.size;
5019 else if (hresolve->root.type == bfd_link_hash_undefweak)
5028 val = (symsec->output_section->vma
5029 + symsec->output_offset
5030 + (GET_WORD (input_bfd, sym->e_value)
5033 /* If this is a global symbol set the written flag, and if
5034 it is a local symbol see if we should discard it. */
5038 h->indx = obj_aout_external_sym_count (output_bfd);
5040 else if ((type & N_TYPE) != N_SETT
5041 && (type & N_TYPE) != N_SETD
5042 && (type & N_TYPE) != N_SETB
5043 && (type & N_TYPE) != N_SETA)
5048 case discard_sec_merge:
5051 if ((type & N_STAB) == 0
5052 && bfd_is_local_label_name (input_bfd, name))
5066 /* An N_BINCL symbol indicates the start of the stabs
5067 entries for a header file. We need to scan ahead to the
5068 next N_EINCL symbol, ignoring nesting, adding up all the
5069 characters in the symbol names, not including the file
5070 numbers in types (the first number after an open
5072 if (type == (int) N_BINCL)
5074 struct external_nlist *incl_sym;
5076 struct aout_link_includes_entry *incl_entry;
5077 struct aout_link_includes_totals *t;
5081 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5085 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5086 if (incl_type == (int) N_EINCL)
5092 else if (incl_type == (int) N_BINCL)
5098 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5099 for (; *s != '\0'; s++)
5104 /* Skip the file number. */
5106 while (ISDIGIT (*s))
5114 /* If we have already included a header file with the
5115 same value, then replace this one with an N_EXCL
5117 copy = (bfd_boolean) (! finfo->info->keep_memory);
5118 incl_entry = aout_link_includes_lookup (&finfo->includes,
5120 if (incl_entry == NULL)
5122 for (t = incl_entry->totals; t != NULL; t = t->next)
5123 if (t->total == val)
5127 /* This is the first time we have seen this header
5128 file with this set of stabs strings. */
5129 t = bfd_hash_allocate (&finfo->includes.root,
5134 t->next = incl_entry->totals;
5135 incl_entry->totals = t;
5141 /* This is a duplicate header file. We must change
5142 it to be an N_EXCL entry, and mark all the
5143 included symbols to prevent outputting them. */
5144 type = (int) N_EXCL;
5147 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5149 incl_sym++, incl_map++)
5153 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5154 if (incl_type == (int) N_EINCL)
5163 else if (incl_type == (int) N_BINCL)
5172 /* Copy this symbol into the list of symbols we are going to
5174 H_PUT_8 (output_bfd, type, outsym->e_type);
5175 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5176 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5178 if (! finfo->info->keep_memory)
5180 /* name points into a string table which we are going to
5181 free. If there is a hash table entry, use that string.
5182 Otherwise, copy name into memory. */
5184 name = h->root.root.string;
5188 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
5190 if (strtab_index == (bfd_size_type) -1)
5192 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5193 PUT_WORD (output_bfd, val, outsym->e_value);
5194 *symbol_map = obj_aout_external_sym_count (output_bfd);
5195 ++obj_aout_external_sym_count (output_bfd);
5199 /* Write out the output symbols we have just constructed. */
5200 if (outsym > finfo->output_syms)
5202 bfd_size_type outsym_size;
5204 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
5206 outsym_size = outsym - finfo->output_syms;
5207 outsym_size *= EXTERNAL_NLIST_SIZE;
5208 if (bfd_bwrite ((void *) finfo->output_syms, outsym_size, output_bfd)
5211 finfo->symoff += outsym_size;
5217 /* Link an a.out input BFD into the output file. */
5220 aout_link_input_bfd (struct aout_final_link_info *finfo, bfd *input_bfd)
5222 bfd_size_type sym_count;
5224 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5226 /* If this is a dynamic object, it may need special handling. */
5227 if ((input_bfd->flags & DYNAMIC) != 0
5228 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5229 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5230 (finfo->info, input_bfd));
5232 /* Get the symbols. We probably have them already, unless
5233 finfo->info->keep_memory is FALSE. */
5234 if (! aout_get_external_symbols (input_bfd))
5237 sym_count = obj_aout_external_sym_count (input_bfd);
5239 /* Write out the symbols and get a map of the new indices. The map
5240 is placed into finfo->symbol_map. */
5241 if (! aout_link_write_symbols (finfo, input_bfd))
5244 /* Relocate and write out the sections. These functions use the
5245 symbol map created by aout_link_write_symbols. The linker_mark
5246 field will be set if these sections are to be included in the
5247 link, which will normally be the case. */
5248 if (obj_textsec (input_bfd)->linker_mark)
5250 if (! aout_link_input_section (finfo, input_bfd,
5251 obj_textsec (input_bfd),
5253 exec_hdr (input_bfd)->a_trsize))
5256 if (obj_datasec (input_bfd)->linker_mark)
5258 if (! aout_link_input_section (finfo, input_bfd,
5259 obj_datasec (input_bfd),
5261 exec_hdr (input_bfd)->a_drsize))
5265 /* If we are not keeping memory, we don't need the symbols any
5266 longer. We still need them if we are keeping memory, because the
5267 strings in the hash table point into them. */
5268 if (! finfo->info->keep_memory)
5270 if (! aout_link_free_symbols (input_bfd))
5277 /* Do the final link step. This is called on the output BFD. The
5278 INFO structure should point to a list of BFDs linked through the
5279 link_next field which can be used to find each BFD which takes part
5280 in the output. Also, each section in ABFD should point to a list
5281 of bfd_link_order structures which list all the input sections for
5282 the output section. */
5285 NAME (aout, final_link) (bfd *abfd,
5286 struct bfd_link_info *info,
5287 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5289 struct aout_final_link_info aout_info;
5290 bfd_boolean includes_hash_initialized = FALSE;
5292 bfd_size_type trsize, drsize;
5293 bfd_size_type max_contents_size;
5294 bfd_size_type max_relocs_size;
5295 bfd_size_type max_sym_count;
5296 bfd_size_type text_size;
5298 struct bfd_link_order *p;
5300 bfd_boolean have_link_order_relocs;
5303 abfd->flags |= DYNAMIC;
5305 aout_info.info = info;
5306 aout_info.output_bfd = abfd;
5307 aout_info.contents = NULL;
5308 aout_info.relocs = NULL;
5309 aout_info.symbol_map = NULL;
5310 aout_info.output_syms = NULL;
5312 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5313 aout_link_includes_newfunc,
5314 sizeof (struct aout_link_includes_entry),
5317 includes_hash_initialized = TRUE;
5319 /* Figure out the largest section size. Also, if generating
5320 relocatable output, count the relocs. */
5323 max_contents_size = 0;
5324 max_relocs_size = 0;
5326 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5330 if (info->relocatable)
5332 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5334 trsize += exec_hdr (sub)->a_trsize;
5335 drsize += exec_hdr (sub)->a_drsize;
5339 /* FIXME: We need to identify the .text and .data sections
5340 and call get_reloc_upper_bound and canonicalize_reloc to
5341 work out the number of relocs needed, and then multiply
5342 by the reloc size. */
5343 (*_bfd_error_handler)
5344 (_("%s: relocatable link from %s to %s not supported"),
5345 bfd_get_filename (abfd),
5346 sub->xvec->name, abfd->xvec->name);
5347 bfd_set_error (bfd_error_invalid_operation);
5352 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5354 sz = obj_textsec (sub)->size;
5355 if (sz > max_contents_size)
5356 max_contents_size = sz;
5357 sz = obj_datasec (sub)->size;
5358 if (sz > max_contents_size)
5359 max_contents_size = sz;
5361 sz = exec_hdr (sub)->a_trsize;
5362 if (sz > max_relocs_size)
5363 max_relocs_size = sz;
5364 sz = exec_hdr (sub)->a_drsize;
5365 if (sz > max_relocs_size)
5366 max_relocs_size = sz;
5368 sz = obj_aout_external_sym_count (sub);
5369 if (sz > max_sym_count)
5374 if (info->relocatable)
5376 if (obj_textsec (abfd) != NULL)
5377 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5378 ->map_head.link_order)
5379 * obj_reloc_entry_size (abfd));
5380 if (obj_datasec (abfd) != NULL)
5381 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5382 ->map_head.link_order)
5383 * obj_reloc_entry_size (abfd));
5386 exec_hdr (abfd)->a_trsize = trsize;
5387 exec_hdr (abfd)->a_drsize = drsize;
5389 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5391 /* Adjust the section sizes and vmas according to the magic number.
5392 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5393 filepos for each section. */
5394 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
5397 /* The relocation and symbol file positions differ among a.out
5398 targets. We are passed a callback routine from the backend
5399 specific code to handle this.
5400 FIXME: At this point we do not know how much space the symbol
5401 table will require. This will not work for any (nonstandard)
5402 a.out target that needs to know the symbol table size before it
5403 can compute the relocation file positions. This may or may not
5404 be the case for the hp300hpux target, for example. */
5405 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5407 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5408 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5409 obj_sym_filepos (abfd) = aout_info.symoff;
5411 /* We keep a count of the symbols as we output them. */
5412 obj_aout_external_sym_count (abfd) = 0;
5414 /* We accumulate the string table as we write out the symbols. */
5415 aout_info.strtab = _bfd_stringtab_init ();
5416 if (aout_info.strtab == NULL)
5419 /* Allocate buffers to hold section contents and relocs. */
5420 aout_info.contents = bfd_malloc (max_contents_size);
5421 aout_info.relocs = bfd_malloc (max_relocs_size);
5422 aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *));
5423 aout_info.output_syms = bfd_malloc ((max_sym_count + 1)
5424 * sizeof (struct external_nlist));
5425 if ((aout_info.contents == NULL && max_contents_size != 0)
5426 || (aout_info.relocs == NULL && max_relocs_size != 0)
5427 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5428 || aout_info.output_syms == NULL)
5431 /* If we have a symbol named __DYNAMIC, force it out now. This is
5432 required by SunOS. Doing this here rather than in sunos.c is a
5433 hack, but it's easier than exporting everything which would be
5436 struct aout_link_hash_entry *h;
5438 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5439 FALSE, FALSE, FALSE);
5441 aout_link_write_other_symbol (h, &aout_info);
5444 /* The most time efficient way to do the link would be to read all
5445 the input object files into memory and then sort out the
5446 information into the output file. Unfortunately, that will
5447 probably use too much memory. Another method would be to step
5448 through everything that composes the text section and write it
5449 out, and then everything that composes the data section and write
5450 it out, and then write out the relocs, and then write out the
5451 symbols. Unfortunately, that requires reading stuff from each
5452 input file several times, and we will not be able to keep all the
5453 input files open simultaneously, and reopening them will be slow.
5455 What we do is basically process one input file at a time. We do
5456 everything we need to do with an input file once--copy over the
5457 section contents, handle the relocation information, and write
5458 out the symbols--and then we throw away the information we read
5459 from it. This approach requires a lot of lseeks of the output
5460 file, which is unfortunate but still faster than reopening a lot
5463 We use the output_has_begun field of the input BFDs to see
5464 whether we have already handled it. */
5465 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5466 sub->output_has_begun = FALSE;
5468 /* Mark all sections which are to be included in the link. This
5469 will normally be every section. We need to do this so that we
5470 can identify any sections which the linker has decided to not
5472 for (o = abfd->sections; o != NULL; o = o->next)
5474 for (p = o->map_head.link_order; p != NULL; p = p->next)
5475 if (p->type == bfd_indirect_link_order)
5476 p->u.indirect.section->linker_mark = TRUE;
5479 have_link_order_relocs = FALSE;
5480 for (o = abfd->sections; o != NULL; o = o->next)
5482 for (p = o->map_head.link_order;
5486 if (p->type == bfd_indirect_link_order
5487 && (bfd_get_flavour (p->u.indirect.section->owner)
5488 == bfd_target_aout_flavour))
5492 input_bfd = p->u.indirect.section->owner;
5493 if (! input_bfd->output_has_begun)
5495 if (! aout_link_input_bfd (&aout_info, input_bfd))
5497 input_bfd->output_has_begun = TRUE;
5500 else if (p->type == bfd_section_reloc_link_order
5501 || p->type == bfd_symbol_reloc_link_order)
5503 /* These are handled below. */
5504 have_link_order_relocs = TRUE;
5508 if (! _bfd_default_link_order (abfd, info, o, p))
5514 /* Write out any symbols that we have not already written out. */
5515 aout_link_hash_traverse (aout_hash_table (info),
5516 aout_link_write_other_symbol,
5517 (void *) &aout_info);
5519 /* Now handle any relocs we were asked to create by the linker.
5520 These did not come from any input file. We must do these after
5521 we have written out all the symbols, so that we know the symbol
5523 if (have_link_order_relocs)
5525 for (o = abfd->sections; o != NULL; o = o->next)
5527 for (p = o->map_head.link_order;
5531 if (p->type == bfd_section_reloc_link_order
5532 || p->type == bfd_symbol_reloc_link_order)
5534 if (! aout_link_reloc_link_order (&aout_info, o, p))
5541 if (aout_info.contents != NULL)
5543 free (aout_info.contents);
5544 aout_info.contents = NULL;
5546 if (aout_info.relocs != NULL)
5548 free (aout_info.relocs);
5549 aout_info.relocs = NULL;
5551 if (aout_info.symbol_map != NULL)
5553 free (aout_info.symbol_map);
5554 aout_info.symbol_map = NULL;
5556 if (aout_info.output_syms != NULL)
5558 free (aout_info.output_syms);
5559 aout_info.output_syms = NULL;
5561 if (includes_hash_initialized)
5563 bfd_hash_table_free (&aout_info.includes.root);
5564 includes_hash_initialized = FALSE;
5567 /* Finish up any dynamic linking we may be doing. */
5568 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5570 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5574 /* Update the header information. */
5575 abfd->symcount = obj_aout_external_sym_count (abfd);
5576 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5577 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5578 obj_textsec (abfd)->reloc_count =
5579 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5580 obj_datasec (abfd)->reloc_count =
5581 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5583 /* Write out the string table, unless there are no symbols. */
5584 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
5586 if (abfd->symcount > 0)
5588 if (!emit_stringtab (abfd, aout_info.strtab))
5593 bfd_byte b[BYTES_IN_WORD];
5595 memset (b, 0, BYTES_IN_WORD);
5596 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
5603 if (aout_info.contents != NULL)
5604 free (aout_info.contents);
5605 if (aout_info.relocs != NULL)
5606 free (aout_info.relocs);
5607 if (aout_info.symbol_map != NULL)
5608 free (aout_info.symbol_map);
5609 if (aout_info.output_syms != NULL)
5610 free (aout_info.output_syms);
5611 if (includes_hash_initialized)
5612 bfd_hash_table_free (&aout_info.includes.root);