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, 2008, 2009, 2010, 2011
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_arch_bits_per_address (abfd))
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 = (struct aout_data_struct *) 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 && execp->a_trsize == 0
634 && execp->a_drsize == 0))
635 abfd->flags |= EXEC_P;
639 struct stat stat_buf;
641 /* The original heuristic doesn't work in some important cases.
642 The a.out file has no information about the text start
643 address. For files (like kernels) linked to non-standard
644 addresses (ld -Ttext nnn) the entry point may not be between
645 the default text start (obj_textsec(abfd)->vma) and
646 (obj_textsec(abfd)->vma) + text size. This is not just a mach
647 issue. Many kernels are loaded at non standard addresses. */
648 if (abfd->iostream != NULL
649 && (abfd->flags & BFD_IN_MEMORY) == 0
650 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
651 && ((stat_buf.st_mode & 0111) != 0))
652 abfd->flags |= EXEC_P;
654 #endif /* STAT_FOR_EXEC */
660 bfd_release (abfd, rawptr);
661 abfd->tdata.aout_data = oldrawptr;
667 aout_@var{size}_mkobject
670 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
673 Initialize BFD @var{abfd} for use with a.out files.
677 NAME (aout, mkobject) (bfd *abfd)
679 struct aout_data_struct *rawptr;
680 bfd_size_type amt = sizeof (* rawptr);
682 bfd_set_error (bfd_error_system_call);
684 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, amt);
688 abfd->tdata.aout_data = rawptr;
689 exec_hdr (abfd) = &(rawptr->e);
691 obj_textsec (abfd) = NULL;
692 obj_datasec (abfd) = NULL;
693 obj_bsssec (abfd) = NULL;
700 aout_@var{size}_machine_type
703 enum machine_type aout_@var{size}_machine_type
704 (enum bfd_architecture arch,
705 unsigned long machine,
706 bfd_boolean *unknown);
709 Keep track of machine architecture and machine type for
710 a.out's. Return the <<machine_type>> for a particular
711 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
712 and machine can't be represented in a.out format.
714 If the architecture is understood, machine type 0 (default)
715 is always understood.
719 NAME (aout, machine_type) (enum bfd_architecture arch,
720 unsigned long machine,
721 bfd_boolean *unknown)
723 enum machine_type arch_flags;
725 arch_flags = M_UNKNOWN;
732 || machine == bfd_mach_sparc
733 || machine == bfd_mach_sparc_sparclite
734 || machine == bfd_mach_sparc_sparclite_le
735 || machine == bfd_mach_sparc_v8plus
736 || machine == bfd_mach_sparc_v8plusa
737 || machine == bfd_mach_sparc_v8plusb
738 || machine == bfd_mach_sparc_v9
739 || machine == bfd_mach_sparc_v9a
740 || machine == bfd_mach_sparc_v9b)
741 arch_flags = M_SPARC;
742 else if (machine == bfd_mach_sparc_sparclet)
743 arch_flags = M_SPARCLET;
749 case 0: arch_flags = M_68010; break;
750 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break;
751 case bfd_mach_m68010: arch_flags = M_68010; break;
752 case bfd_mach_m68020: arch_flags = M_68020; break;
753 default: arch_flags = M_UNKNOWN; break;
759 || machine == bfd_mach_i386_i386
760 || machine == bfd_mach_i386_i386_intel_syntax)
773 case bfd_mach_mips3000:
774 case bfd_mach_mips3900:
775 arch_flags = M_MIPS1;
777 case bfd_mach_mips6000:
778 arch_flags = M_MIPS2;
780 case bfd_mach_mips4000:
781 case bfd_mach_mips4010:
782 case bfd_mach_mips4100:
783 case bfd_mach_mips4300:
784 case bfd_mach_mips4400:
785 case bfd_mach_mips4600:
786 case bfd_mach_mips4650:
787 case bfd_mach_mips8000:
788 case bfd_mach_mips9000:
789 case bfd_mach_mips10000:
790 case bfd_mach_mips12000:
791 case bfd_mach_mips14000:
792 case bfd_mach_mips16000:
793 case bfd_mach_mips16:
794 case bfd_mach_mipsisa32:
795 case bfd_mach_mipsisa32r2:
797 case bfd_mach_mipsisa64:
798 case bfd_mach_mipsisa64r2:
799 case bfd_mach_mips_sb1:
800 case bfd_mach_mips_xlr:
801 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
802 arch_flags = M_MIPS2;
805 arch_flags = M_UNKNOWN;
813 case 0: arch_flags = M_NS32532; break;
814 case 32032: arch_flags = M_NS32032; break;
815 case 32532: arch_flags = M_NS32532; break;
816 default: arch_flags = M_UNKNOWN; break;
825 if (machine == 0 || machine == 255)
834 arch_flags = M_UNKNOWN;
837 if (arch_flags != M_UNKNOWN)
845 aout_@var{size}_set_arch_mach
848 bfd_boolean aout_@var{size}_set_arch_mach,
850 enum bfd_architecture arch,
851 unsigned long machine);
854 Set the architecture and the machine of the BFD @var{abfd} to the
855 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
856 can support the architecture required.
860 NAME (aout, set_arch_mach) (bfd *abfd,
861 enum bfd_architecture arch,
862 unsigned long machine)
864 if (! bfd_default_set_arch_mach (abfd, arch, machine))
867 if (arch != bfd_arch_unknown)
871 NAME (aout, machine_type) (arch, machine, &unknown);
876 /* Determine the size of a relocation entry. */
881 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
884 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
888 return (*aout_backend_info (abfd)->set_sizes) (abfd);
892 adjust_o_magic (bfd *abfd, struct internal_exec *execp)
894 file_ptr pos = adata (abfd).exec_bytes_size;
899 obj_textsec (abfd)->filepos = pos;
900 if (!obj_textsec (abfd)->user_set_vma)
901 obj_textsec (abfd)->vma = vma;
903 vma = obj_textsec (abfd)->vma;
905 pos += obj_textsec (abfd)->size;
906 vma += obj_textsec (abfd)->size;
909 if (!obj_datasec (abfd)->user_set_vma)
911 obj_textsec (abfd)->size += pad;
914 obj_datasec (abfd)->vma = vma;
917 vma = obj_datasec (abfd)->vma;
918 obj_datasec (abfd)->filepos = pos;
919 pos += obj_datasec (abfd)->size;
920 vma += obj_datasec (abfd)->size;
923 if (!obj_bsssec (abfd)->user_set_vma)
925 obj_datasec (abfd)->size += pad;
928 obj_bsssec (abfd)->vma = vma;
932 /* The VMA of the .bss section is set by the VMA of the
933 .data section plus the size of the .data section. We may
934 need to add padding bytes to make this true. */
935 pad = obj_bsssec (abfd)->vma - vma;
938 obj_datasec (abfd)->size += pad;
942 obj_bsssec (abfd)->filepos = pos;
944 /* Fix up the exec header. */
945 execp->a_text = obj_textsec (abfd)->size;
946 execp->a_data = obj_datasec (abfd)->size;
947 execp->a_bss = obj_bsssec (abfd)->size;
948 N_SET_MAGIC (*execp, OMAGIC);
952 adjust_z_magic (bfd *abfd, struct internal_exec *execp)
954 bfd_size_type data_pad, text_pad;
956 const struct aout_backend_data *abdp;
957 /* TRUE if text includes exec header. */
960 abdp = aout_backend_info (abfd);
964 && (abdp->text_includes_header
965 || obj_aout_subformat (abfd) == q_magic_format));
966 obj_textsec (abfd)->filepos = (ztih
967 ? adata (abfd).exec_bytes_size
968 : adata (abfd).zmagic_disk_block_size);
969 if (! obj_textsec (abfd)->user_set_vma)
971 /* ?? Do we really need to check for relocs here? */
972 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
975 ? (abdp->default_text_vma
976 + adata (abfd).exec_bytes_size)
977 : abdp->default_text_vma));
982 /* The .text section is being loaded at an unusual address. We
983 may need to pad it such that the .data section starts at a page
986 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
987 & (adata (abfd).page_size - 1));
989 text_pad = ((- obj_textsec (abfd)->vma)
990 & (adata (abfd).page_size - 1));
993 /* Find start of data. */
996 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size;
997 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1001 /* Note that if page_size == zmagic_disk_block_size, then
1002 filepos == page_size, and this case is the same as the ztih
1004 text_end = obj_textsec (abfd)->size;
1005 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1006 text_end += obj_textsec (abfd)->filepos;
1008 obj_textsec (abfd)->size += text_pad;
1009 text_end += text_pad;
1012 if (!obj_datasec (abfd)->user_set_vma)
1015 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size;
1016 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1018 if (abdp && abdp->zmagic_mapped_contiguous)
1020 asection * text = obj_textsec (abfd);
1021 asection * data = obj_datasec (abfd);
1023 text_pad = data->vma - (text->vma + text->size);
1024 /* Only pad the text section if the data
1025 section is going to be placed after it. */
1027 text->size += text_pad;
1029 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1030 + obj_textsec (abfd)->size);
1032 /* Fix up exec header while we're at it. */
1033 execp->a_text = obj_textsec (abfd)->size;
1034 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1035 execp->a_text += adata (abfd).exec_bytes_size;
1036 if (obj_aout_subformat (abfd) == q_magic_format)
1037 N_SET_MAGIC (*execp, QMAGIC);
1039 N_SET_MAGIC (*execp, ZMAGIC);
1041 /* Spec says data section should be rounded up to page boundary. */
1042 obj_datasec (abfd)->size
1043 = align_power (obj_datasec (abfd)->size,
1044 obj_bsssec (abfd)->alignment_power);
1045 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size,
1046 adata (abfd).page_size);
1047 data_pad = execp->a_data - obj_datasec (abfd)->size;
1050 if (!obj_bsssec (abfd)->user_set_vma)
1051 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1052 + obj_datasec (abfd)->size);
1053 /* If the BSS immediately follows the data section and extra space
1054 in the page is left after the data section, fudge data
1055 in the header so that the bss section looks smaller by that
1056 amount. We'll start the bss section there, and lie to the OS.
1057 (Note that a linker script, as well as the above assignment,
1058 could have explicitly set the BSS vma to immediately follow
1059 the data section.) */
1060 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1061 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size)
1062 execp->a_bss = (data_pad > obj_bsssec (abfd)->size
1063 ? 0 : obj_bsssec (abfd)->size - data_pad);
1065 execp->a_bss = obj_bsssec (abfd)->size;
1069 adjust_n_magic (bfd *abfd, struct internal_exec *execp)
1071 file_ptr pos = adata (abfd).exec_bytes_size;
1076 obj_textsec (abfd)->filepos = pos;
1077 if (!obj_textsec (abfd)->user_set_vma)
1078 obj_textsec (abfd)->vma = vma;
1080 vma = obj_textsec (abfd)->vma;
1081 pos += obj_textsec (abfd)->size;
1082 vma += obj_textsec (abfd)->size;
1085 obj_datasec (abfd)->filepos = pos;
1086 if (!obj_datasec (abfd)->user_set_vma)
1087 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1088 vma = obj_datasec (abfd)->vma;
1090 /* Since BSS follows data immediately, see if it needs alignment. */
1091 vma += obj_datasec (abfd)->size;
1092 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1093 obj_datasec (abfd)->size += pad;
1094 pos += obj_datasec (abfd)->size;
1097 if (!obj_bsssec (abfd)->user_set_vma)
1098 obj_bsssec (abfd)->vma = vma;
1100 vma = obj_bsssec (abfd)->vma;
1102 /* Fix up exec header. */
1103 execp->a_text = obj_textsec (abfd)->size;
1104 execp->a_data = obj_datasec (abfd)->size;
1105 execp->a_bss = obj_bsssec (abfd)->size;
1106 N_SET_MAGIC (*execp, NMAGIC);
1110 NAME (aout, adjust_sizes_and_vmas) (bfd *abfd,
1111 bfd_size_type *text_size,
1112 file_ptr *text_end ATTRIBUTE_UNUSED)
1114 struct internal_exec *execp = exec_hdr (abfd);
1116 if (! NAME (aout, make_sections) (abfd))
1119 if (adata (abfd).magic != undecided_magic)
1122 obj_textsec (abfd)->size =
1123 align_power (obj_textsec (abfd)->size,
1124 obj_textsec (abfd)->alignment_power);
1126 *text_size = obj_textsec (abfd)->size;
1127 /* Rule (heuristic) for when to pad to a new page. Note that there
1128 are (at least) two ways demand-paged (ZMAGIC) files have been
1129 handled. Most Berkeley-based systems start the text segment at
1130 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1131 segment right after the exec header; the latter is counted in the
1132 text segment size, and is paged in by the kernel with the rest of
1135 /* This perhaps isn't the right way to do this, but made it simpler for me
1136 to understand enough to implement it. Better would probably be to go
1137 right from BFD flags to alignment/positioning characteristics. But the
1138 old code was sloppy enough about handling the flags, and had enough
1139 other magic, that it was a little hard for me to understand. I think
1140 I understand it better now, but I haven't time to do the cleanup this
1143 if (abfd->flags & D_PAGED)
1144 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1145 adata (abfd).magic = z_magic;
1146 else if (abfd->flags & WP_TEXT)
1147 adata (abfd).magic = n_magic;
1149 adata (abfd).magic = o_magic;
1151 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1153 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1155 switch (adata (abfd).magic)
1157 case n_magic: str = "NMAGIC"; break;
1158 case o_magic: str = "OMAGIC"; break;
1159 case z_magic: str = "ZMAGIC"; break;
1164 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1165 obj_textsec (abfd)->alignment_power,
1166 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1167 obj_datasec (abfd)->alignment_power,
1168 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size,
1169 obj_bsssec (abfd)->alignment_power);
1173 switch (adata (abfd).magic)
1176 adjust_o_magic (abfd, execp);
1179 adjust_z_magic (abfd, execp);
1182 adjust_n_magic (abfd, execp);
1188 #ifdef BFD_AOUT_DEBUG
1189 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1190 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1191 obj_textsec (abfd)->filepos,
1192 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1193 obj_datasec (abfd)->filepos,
1194 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size);
1202 aout_@var{size}_new_section_hook
1205 bfd_boolean aout_@var{size}_new_section_hook,
1210 Called by the BFD in response to a @code{bfd_make_section}
1214 NAME (aout, new_section_hook) (bfd *abfd, asection *newsect)
1216 /* Align to double at least. */
1217 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
1219 if (bfd_get_format (abfd) == bfd_object)
1221 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1223 obj_textsec (abfd)= newsect;
1224 newsect->target_index = N_TEXT;
1226 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1228 obj_datasec (abfd) = newsect;
1229 newsect->target_index = N_DATA;
1231 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1233 obj_bsssec (abfd) = newsect;
1234 newsect->target_index = N_BSS;
1238 /* We allow more than three sections internally. */
1239 return _bfd_generic_new_section_hook (abfd, newsect);
1243 NAME (aout, set_section_contents) (bfd *abfd,
1245 const void * location,
1247 bfd_size_type count)
1250 bfd_size_type text_size;
1252 if (! abfd->output_has_begun)
1254 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1258 if (section == obj_bsssec (abfd))
1260 bfd_set_error (bfd_error_no_contents);
1264 if (section != obj_textsec (abfd)
1265 && section != obj_datasec (abfd))
1267 if (aout_section_merge_with_text_p (abfd, section))
1268 section->filepos = obj_textsec (abfd)->filepos +
1269 (section->vma - obj_textsec (abfd)->vma);
1272 (*_bfd_error_handler)
1273 (_("%s: can not represent section `%s' in a.out object file format"),
1274 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1275 bfd_set_error (bfd_error_nonrepresentable_section);
1282 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1283 || bfd_bwrite (location, count, abfd) != count)
1290 /* Read the external symbols from an a.out file. */
1293 aout_get_external_symbols (bfd *abfd)
1295 if (obj_aout_external_syms (abfd) == NULL)
1297 bfd_size_type count;
1298 struct external_nlist *syms;
1300 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1302 return TRUE; /* Nothing to do. */
1305 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
1306 exec_hdr (abfd)->a_syms,
1307 &obj_aout_sym_window (abfd), TRUE))
1309 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1311 /* We allocate using malloc to make the values easy to free
1312 later on. If we put them on the objalloc it might not be
1313 possible to free them. */
1314 syms = (struct external_nlist *) bfd_malloc (count * EXTERNAL_NLIST_SIZE);
1320 amt = exec_hdr (abfd)->a_syms;
1321 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1322 || bfd_bread (syms, amt, abfd) != amt)
1330 obj_aout_external_syms (abfd) = syms;
1331 obj_aout_external_sym_count (abfd) = count;
1334 if (obj_aout_external_strings (abfd) == NULL
1335 && exec_hdr (abfd)->a_syms != 0)
1337 unsigned char string_chars[BYTES_IN_WORD];
1338 bfd_size_type stringsize;
1340 bfd_size_type amt = BYTES_IN_WORD;
1342 /* Get the size of the strings. */
1343 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1344 || bfd_bread ((void *) string_chars, amt, abfd) != amt)
1346 stringsize = GET_WORD (abfd, string_chars);
1349 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1350 &obj_aout_string_window (abfd), TRUE))
1352 strings = (char *) obj_aout_string_window (abfd).data;
1354 strings = (char *) bfd_malloc (stringsize + 1);
1355 if (strings == NULL)
1358 /* Skip space for the string count in the buffer for convenience
1359 when using indexes. */
1360 amt = stringsize - BYTES_IN_WORD;
1361 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1368 /* Ensure that a zero index yields an empty string. */
1371 strings[stringsize - 1] = 0;
1373 obj_aout_external_strings (abfd) = strings;
1374 obj_aout_external_string_size (abfd) = stringsize;
1380 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1381 and symbol->value fields of CACHE_PTR will be set from the a.out
1382 nlist structure. This function is responsible for setting
1383 symbol->flags and symbol->section, and adjusting symbol->value. */
1386 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1390 if ((cache_ptr->type & N_STAB) != 0
1391 || cache_ptr->type == N_FN)
1395 /* This is a debugging symbol. */
1396 cache_ptr->symbol.flags = BSF_DEBUGGING;
1398 /* Work out the symbol section. */
1399 switch (cache_ptr->type & N_TYPE)
1403 sec = obj_textsec (abfd);
1406 sec = obj_datasec (abfd);
1409 sec = obj_bsssec (abfd);
1413 sec = bfd_abs_section_ptr;
1417 cache_ptr->symbol.section = sec;
1418 cache_ptr->symbol.value -= sec->vma;
1423 /* Get the default visibility. This does not apply to all types, so
1424 we just hold it in a local variable to use if wanted. */
1425 if ((cache_ptr->type & N_EXT) == 0)
1426 visible = BSF_LOCAL;
1428 visible = BSF_GLOBAL;
1430 switch (cache_ptr->type)
1433 case N_ABS: case N_ABS | N_EXT:
1434 cache_ptr->symbol.section = bfd_abs_section_ptr;
1435 cache_ptr->symbol.flags = visible;
1438 case N_UNDF | N_EXT:
1439 if (cache_ptr->symbol.value != 0)
1441 /* This is a common symbol. */
1442 cache_ptr->symbol.flags = BSF_GLOBAL;
1443 cache_ptr->symbol.section = bfd_com_section_ptr;
1447 cache_ptr->symbol.flags = 0;
1448 cache_ptr->symbol.section = bfd_und_section_ptr;
1452 case N_TEXT: case N_TEXT | N_EXT:
1453 cache_ptr->symbol.section = obj_textsec (abfd);
1454 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1455 cache_ptr->symbol.flags = visible;
1458 /* N_SETV symbols used to represent set vectors placed in the
1459 data section. They are no longer generated. Theoretically,
1460 it was possible to extract the entries and combine them with
1461 new ones, although I don't know if that was ever actually
1462 done. Unless that feature is restored, treat them as data
1464 case N_SETV: case N_SETV | N_EXT:
1465 case N_DATA: case N_DATA | N_EXT:
1466 cache_ptr->symbol.section = obj_datasec (abfd);
1467 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1468 cache_ptr->symbol.flags = visible;
1471 case N_BSS: case N_BSS | N_EXT:
1472 cache_ptr->symbol.section = obj_bsssec (abfd);
1473 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1474 cache_ptr->symbol.flags = visible;
1477 case N_SETA: case N_SETA | N_EXT:
1478 case N_SETT: case N_SETT | N_EXT:
1479 case N_SETD: case N_SETD | N_EXT:
1480 case N_SETB: case N_SETB | N_EXT:
1482 /* This code is no longer needed. It used to be used to make
1483 the linker handle set symbols, but they are now handled in
1484 the add_symbols routine instead. */
1485 switch (cache_ptr->type & N_TYPE)
1488 cache_ptr->symbol.section = bfd_abs_section_ptr;
1491 cache_ptr->symbol.section = obj_textsec (abfd);
1494 cache_ptr->symbol.section = obj_datasec (abfd);
1497 cache_ptr->symbol.section = obj_bsssec (abfd);
1501 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1506 /* This symbol is the text of a warning message. The next
1507 symbol is the symbol to associate the warning with. If a
1508 reference is made to that symbol, a warning is issued. */
1509 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1510 cache_ptr->symbol.section = bfd_abs_section_ptr;
1513 case N_INDR: case N_INDR | N_EXT:
1514 /* An indirect symbol. This consists of two symbols in a row.
1515 The first symbol is the name of the indirection. The second
1516 symbol is the name of the target. A reference to the first
1517 symbol becomes a reference to the second. */
1518 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1519 cache_ptr->symbol.section = bfd_ind_section_ptr;
1523 cache_ptr->symbol.section = bfd_und_section_ptr;
1524 cache_ptr->symbol.flags = BSF_WEAK;
1528 cache_ptr->symbol.section = bfd_abs_section_ptr;
1529 cache_ptr->symbol.flags = BSF_WEAK;
1533 cache_ptr->symbol.section = obj_textsec (abfd);
1534 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1535 cache_ptr->symbol.flags = BSF_WEAK;
1539 cache_ptr->symbol.section = obj_datasec (abfd);
1540 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1541 cache_ptr->symbol.flags = BSF_WEAK;
1545 cache_ptr->symbol.section = obj_bsssec (abfd);
1546 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1547 cache_ptr->symbol.flags = BSF_WEAK;
1554 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1557 translate_to_native_sym_flags (bfd *abfd,
1559 struct external_nlist *sym_pointer)
1561 bfd_vma value = cache_ptr->value;
1565 /* Mask out any existing type bits in case copying from one section
1567 sym_pointer->e_type[0] &= ~N_TYPE;
1569 sec = bfd_get_section (cache_ptr);
1574 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1576 (*_bfd_error_handler)
1577 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1578 bfd_get_filename (abfd),
1579 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1580 bfd_set_error (bfd_error_nonrepresentable_section);
1584 if (sec->output_section != NULL)
1586 off = sec->output_offset;
1587 sec = sec->output_section;
1590 if (bfd_is_abs_section (sec))
1591 sym_pointer->e_type[0] |= N_ABS;
1592 else if (sec == obj_textsec (abfd))
1593 sym_pointer->e_type[0] |= N_TEXT;
1594 else if (sec == obj_datasec (abfd))
1595 sym_pointer->e_type[0] |= N_DATA;
1596 else if (sec == obj_bsssec (abfd))
1597 sym_pointer->e_type[0] |= N_BSS;
1598 else if (bfd_is_und_section (sec))
1599 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1600 else if (bfd_is_ind_section (sec))
1601 sym_pointer->e_type[0] = N_INDR;
1602 else if (bfd_is_com_section (sec))
1603 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1606 if (aout_section_merge_with_text_p (abfd, sec))
1607 sym_pointer->e_type[0] |= N_TEXT;
1610 (*_bfd_error_handler)
1611 (_("%s: can not represent section `%s' in a.out object file format"),
1612 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1613 bfd_set_error (bfd_error_nonrepresentable_section);
1618 /* Turn the symbol from section relative to absolute again. */
1619 value += sec->vma + off;
1621 if ((cache_ptr->flags & BSF_WARNING) != 0)
1622 sym_pointer->e_type[0] = N_WARNING;
1624 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1625 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1626 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1627 sym_pointer->e_type[0] |= N_EXT;
1628 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1629 sym_pointer->e_type[0] &= ~N_EXT;
1631 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1633 int type = ((aout_symbol_type *) cache_ptr)->type;
1637 case N_ABS: type = N_SETA; break;
1638 case N_TEXT: type = N_SETT; break;
1639 case N_DATA: type = N_SETD; break;
1640 case N_BSS: type = N_SETB; break;
1642 sym_pointer->e_type[0] = type;
1645 if ((cache_ptr->flags & BSF_WEAK) != 0)
1649 switch (sym_pointer->e_type[0] & N_TYPE)
1652 case N_ABS: type = N_WEAKA; break;
1653 case N_TEXT: type = N_WEAKT; break;
1654 case N_DATA: type = N_WEAKD; break;
1655 case N_BSS: type = N_WEAKB; break;
1656 case N_UNDF: type = N_WEAKU; break;
1658 sym_pointer->e_type[0] = type;
1661 PUT_WORD (abfd, value, sym_pointer->e_value);
1666 /* Native-level interface to symbols. */
1669 NAME (aout, make_empty_symbol) (bfd *abfd)
1671 bfd_size_type amt = sizeof (aout_symbol_type);
1673 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt);
1676 new_symbol->symbol.the_bfd = abfd;
1678 return &new_symbol->symbol;
1681 /* Translate a set of internal symbols into external symbols. */
1684 NAME (aout, translate_symbol_table) (bfd *abfd,
1685 aout_symbol_type *in,
1686 struct external_nlist *ext,
1687 bfd_size_type count,
1689 bfd_size_type strsize,
1690 bfd_boolean dynamic)
1692 struct external_nlist *ext_end;
1694 ext_end = ext + count;
1695 for (; ext < ext_end; ext++, in++)
1699 x = GET_WORD (abfd, ext->e_strx);
1700 in->symbol.the_bfd = abfd;
1702 /* For the normal symbols, the zero index points at the number
1703 of bytes in the string table but is to be interpreted as the
1704 null string. For the dynamic symbols, the number of bytes in
1705 the string table is stored in the __DYNAMIC structure and the
1706 zero index points at an actual string. */
1707 if (x == 0 && ! dynamic)
1708 in->symbol.name = "";
1709 else if (x < strsize)
1710 in->symbol.name = str + x;
1714 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1715 in->desc = H_GET_16 (abfd, ext->e_desc);
1716 in->other = H_GET_8 (abfd, ext->e_other);
1717 in->type = H_GET_8 (abfd, ext->e_type);
1718 in->symbol.udata.p = NULL;
1720 if (! translate_from_native_sym_flags (abfd, in))
1724 in->symbol.flags |= BSF_DYNAMIC;
1730 /* We read the symbols into a buffer, which is discarded when this
1731 function exits. We read the strings into a buffer large enough to
1732 hold them all plus all the cached symbol entries. */
1735 NAME (aout, slurp_symbol_table) (bfd *abfd)
1737 struct external_nlist *old_external_syms;
1738 aout_symbol_type *cached;
1739 bfd_size_type cached_size;
1741 /* If there's no work to be done, don't do any. */
1742 if (obj_aout_symbols (abfd) != NULL)
1745 old_external_syms = obj_aout_external_syms (abfd);
1747 if (! aout_get_external_symbols (abfd))
1750 cached_size = obj_aout_external_sym_count (abfd);
1751 if (cached_size == 0)
1752 return TRUE; /* Nothing to do. */
1754 cached_size *= sizeof (aout_symbol_type);
1755 cached = (aout_symbol_type *) bfd_zmalloc (cached_size);
1759 /* Convert from external symbol information to internal. */
1760 if (! (NAME (aout, translate_symbol_table)
1762 obj_aout_external_syms (abfd),
1763 obj_aout_external_sym_count (abfd),
1764 obj_aout_external_strings (abfd),
1765 obj_aout_external_string_size (abfd),
1772 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1774 obj_aout_symbols (abfd) = cached;
1776 /* It is very likely that anybody who calls this function will not
1777 want the external symbol information, so if it was allocated
1778 because of our call to aout_get_external_symbols, we free it up
1779 right away to save space. */
1780 if (old_external_syms == NULL
1781 && obj_aout_external_syms (abfd) != NULL)
1784 bfd_free_window (&obj_aout_sym_window (abfd));
1786 free (obj_aout_external_syms (abfd));
1788 obj_aout_external_syms (abfd) = NULL;
1794 /* We use a hash table when writing out symbols so that we only write
1795 out a particular string once. This helps particularly when the
1796 linker writes out stabs debugging entries, because each different
1797 contributing object file tends to have many duplicate stabs
1800 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1801 if BFD_TRADITIONAL_FORMAT is set. */
1803 /* Get the index of a string in a strtab, adding it if it is not
1806 static inline bfd_size_type
1807 add_to_stringtab (bfd *abfd,
1808 struct bfd_strtab_hash *tab,
1813 bfd_size_type str_index;
1815 /* An index of 0 always means the empty string. */
1816 if (str == 0 || *str == '\0')
1819 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1820 doesn't understand a hashed string table. */
1822 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1825 str_index = _bfd_stringtab_add (tab, str, hash, copy);
1827 if (str_index != (bfd_size_type) -1)
1828 /* Add BYTES_IN_WORD to the return value to account for the
1829 space taken up by the string table size. */
1830 str_index += BYTES_IN_WORD;
1835 /* Write out a strtab. ABFD is already at the right location in the
1839 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1841 bfd_byte buffer[BYTES_IN_WORD];
1842 bfd_size_type amt = BYTES_IN_WORD;
1844 /* The string table starts with the size. */
1845 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1846 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1849 return _bfd_stringtab_emit (abfd, tab);
1853 NAME (aout, write_syms) (bfd *abfd)
1855 unsigned int count ;
1856 asymbol **generic = bfd_get_outsymbols (abfd);
1857 struct bfd_strtab_hash *strtab;
1859 strtab = _bfd_stringtab_init ();
1863 for (count = 0; count < bfd_get_symcount (abfd); count++)
1865 asymbol *g = generic[count];
1867 struct external_nlist nsp;
1870 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1871 if (indx == (bfd_size_type) -1)
1873 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1875 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1877 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1878 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1879 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1883 H_PUT_16 (abfd, 0, nsp.e_desc);
1884 H_PUT_8 (abfd, 0, nsp.e_other);
1885 H_PUT_8 (abfd, 0, nsp.e_type);
1888 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1891 amt = EXTERNAL_NLIST_SIZE;
1892 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1895 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1896 here, at the end. */
1900 if (! emit_stringtab (abfd, strtab))
1903 _bfd_stringtab_free (strtab);
1908 _bfd_stringtab_free (strtab);
1913 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1915 unsigned int counter = 0;
1916 aout_symbol_type *symbase;
1918 if (!NAME (aout, slurp_symbol_table) (abfd))
1921 for (symbase = obj_aout_symbols (abfd);
1922 counter++ < bfd_get_symcount (abfd);
1924 *(location++) = (asymbol *) (symbase++);
1926 return bfd_get_symcount (abfd);
1929 /* Standard reloc stuff. */
1930 /* Output standard relocation information to a file in target byte order. */
1932 extern void NAME (aout, swap_std_reloc_out)
1933 (bfd *, arelent *, struct reloc_std_external *);
1936 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1938 struct reloc_std_external *natptr)
1941 asymbol *sym = *(g->sym_ptr_ptr);
1943 unsigned int r_length;
1945 int r_baserel, r_jmptable, r_relative;
1946 asection *output_section = sym->section->output_section;
1948 PUT_WORD (abfd, g->address, natptr->r_address);
1950 r_length = g->howto->size ; /* Size as a power of two. */
1951 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1952 /* XXX This relies on relocs coming from a.out files. */
1953 r_baserel = (g->howto->type & 8) != 0;
1954 r_jmptable = (g->howto->type & 16) != 0;
1955 r_relative = (g->howto->type & 32) != 0;
1957 /* Name was clobbered by aout_write_syms to be symbol index. */
1959 /* If this relocation is relative to a symbol then set the
1960 r_index to the symbols index, and the r_extern bit.
1962 Absolute symbols can come in in two ways, either as an offset
1963 from the abs section, or as a symbol which has an abs value.
1964 check for that here. */
1966 if (bfd_is_com_section (output_section)
1967 || bfd_is_abs_section (output_section)
1968 || bfd_is_und_section (output_section)
1969 /* PR gas/3041 a.out relocs against weak symbols
1970 must be treated as if they were against externs. */
1971 || (sym->flags & BSF_WEAK))
1973 if (bfd_abs_section_ptr->symbol == sym)
1975 /* Whoops, looked like an abs symbol, but is
1976 really an offset from the abs section. */
1982 /* Fill in symbol. */
1984 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1989 /* Just an ordinary section. */
1991 r_index = output_section->target_index;
1994 /* Now the fun stuff. */
1995 if (bfd_header_big_endian (abfd))
1997 natptr->r_index[0] = r_index >> 16;
1998 natptr->r_index[1] = r_index >> 8;
1999 natptr->r_index[2] = r_index;
2000 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
2001 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
2002 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
2003 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
2004 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
2005 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2009 natptr->r_index[2] = r_index >> 16;
2010 natptr->r_index[1] = r_index >> 8;
2011 natptr->r_index[0] = r_index;
2012 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2013 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2014 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2015 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2016 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2017 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2021 /* Extended stuff. */
2022 /* Output extended relocation information to a file in target byte order. */
2024 extern void NAME (aout, swap_ext_reloc_out)
2025 (bfd *, arelent *, struct reloc_ext_external *);
2028 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2030 struct reloc_ext_external *natptr)
2034 unsigned int r_type;
2036 asymbol *sym = *(g->sym_ptr_ptr);
2037 asection *output_section = sym->section->output_section;
2039 PUT_WORD (abfd, g->address, natptr->r_address);
2041 r_type = (unsigned int) g->howto->type;
2043 r_addend = g->addend;
2044 if ((sym->flags & BSF_SECTION_SYM) != 0)
2045 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2047 /* If this relocation is relative to a symbol then set the
2048 r_index to the symbols index, and the r_extern bit.
2050 Absolute symbols can come in in two ways, either as an offset
2051 from the abs section, or as a symbol which has an abs value.
2052 check for that here. */
2053 if (bfd_is_abs_section (bfd_get_section (sym)))
2058 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2060 if (bfd_is_und_section (bfd_get_section (sym))
2061 || (sym->flags & BSF_GLOBAL) != 0)
2065 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2069 /* Just an ordinary section. */
2071 r_index = output_section->target_index;
2074 /* Now the fun stuff. */
2075 if (bfd_header_big_endian (abfd))
2077 natptr->r_index[0] = r_index >> 16;
2078 natptr->r_index[1] = r_index >> 8;
2079 natptr->r_index[2] = r_index;
2080 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2081 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2085 natptr->r_index[2] = r_index >> 16;
2086 natptr->r_index[1] = r_index >> 8;
2087 natptr->r_index[0] = r_index;
2088 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2089 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2092 PUT_WORD (abfd, r_addend, natptr->r_addend);
2095 /* BFD deals internally with all things based from the section they're
2096 in. so, something in 10 bytes into a text section with a base of
2097 50 would have a symbol (.text+10) and know .text vma was 50.
2099 Aout keeps all it's symbols based from zero, so the symbol would
2100 contain 60. This macro subs the base of each section from the value
2101 to give the true offset from the section. */
2103 #define MOVE_ADDRESS(ad) \
2106 /* Undefined symbol. */ \
2107 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2108 cache_ptr->addend = ad; \
2112 /* Defined, section relative. Replace symbol with pointer to \
2113 symbol which points to section. */ \
2117 case N_TEXT | N_EXT: \
2118 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2119 cache_ptr->addend = ad - su->textsec->vma; \
2122 case N_DATA | N_EXT: \
2123 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2124 cache_ptr->addend = ad - su->datasec->vma; \
2127 case N_BSS | N_EXT: \
2128 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2129 cache_ptr->addend = ad - su->bsssec->vma; \
2133 case N_ABS | N_EXT: \
2134 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2135 cache_ptr->addend = ad; \
2141 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2142 struct reloc_ext_external *bytes,
2145 bfd_size_type symcount)
2147 unsigned int r_index;
2149 unsigned int r_type;
2150 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2152 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2154 /* Now the fun stuff. */
2155 if (bfd_header_big_endian (abfd))
2157 r_index = (((unsigned int) bytes->r_index[0] << 16)
2158 | ((unsigned int) bytes->r_index[1] << 8)
2159 | bytes->r_index[2]);
2160 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2161 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2162 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2166 r_index = (((unsigned int) bytes->r_index[2] << 16)
2167 | ((unsigned int) bytes->r_index[1] << 8)
2168 | bytes->r_index[0]);
2169 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2170 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2171 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2174 if (r_type < TABLE_SIZE (howto_table_ext))
2175 cache_ptr->howto = howto_table_ext + r_type;
2177 cache_ptr->howto = NULL;
2179 /* Base relative relocs are always against the symbol table,
2180 regardless of the setting of r_extern. r_extern just reflects
2181 whether the symbol the reloc is against is local or global. */
2182 if (r_type == (unsigned int) RELOC_BASE10
2183 || r_type == (unsigned int) RELOC_BASE13
2184 || r_type == (unsigned int) RELOC_BASE22)
2187 if (r_extern && r_index > symcount)
2189 /* We could arrange to return an error, but it might be useful
2190 to see the file even if it is bad. */
2195 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2199 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2200 struct reloc_std_external *bytes,
2203 bfd_size_type symcount)
2205 unsigned int r_index;
2207 unsigned int r_length;
2209 int r_baserel, r_jmptable, r_relative;
2210 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2211 unsigned int howto_idx;
2213 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2215 /* Now the fun stuff. */
2216 if (bfd_header_big_endian (abfd))
2218 r_index = (((unsigned int) bytes->r_index[0] << 16)
2219 | ((unsigned int) bytes->r_index[1] << 8)
2220 | bytes->r_index[2]);
2221 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2222 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2223 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2224 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2225 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2226 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2227 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2231 r_index = (((unsigned int) bytes->r_index[2] << 16)
2232 | ((unsigned int) bytes->r_index[1] << 8)
2233 | bytes->r_index[0]);
2234 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2235 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2236 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2237 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2238 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2239 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2240 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2243 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2244 + 16 * r_jmptable + 32 * r_relative);
2245 if (howto_idx < TABLE_SIZE (howto_table_std))
2247 cache_ptr->howto = howto_table_std + howto_idx;
2248 if (cache_ptr->howto->type == (unsigned int) -1)
2249 cache_ptr->howto = NULL;
2252 cache_ptr->howto = NULL;
2254 /* Base relative relocs are always against the symbol table,
2255 regardless of the setting of r_extern. r_extern just reflects
2256 whether the symbol the reloc is against is local or global. */
2260 if (r_extern && r_index > symcount)
2262 /* We could arrange to return an error, but it might be useful
2263 to see the file even if it is bad. */
2271 /* Read and swap the relocs for a section. */
2274 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2276 bfd_size_type count;
2277 bfd_size_type reloc_size;
2279 arelent *reloc_cache;
2281 unsigned int counter = 0;
2285 if (asect->relocation)
2288 if (asect->flags & SEC_CONSTRUCTOR)
2291 if (asect == obj_datasec (abfd))
2292 reloc_size = exec_hdr (abfd)->a_drsize;
2293 else if (asect == obj_textsec (abfd))
2294 reloc_size = exec_hdr (abfd)->a_trsize;
2295 else if (asect == obj_bsssec (abfd))
2299 bfd_set_error (bfd_error_invalid_operation);
2303 if (reloc_size == 0)
2304 return TRUE; /* Nothing to be done. */
2306 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2309 each_size = obj_reloc_entry_size (abfd);
2311 count = reloc_size / each_size;
2313 return TRUE; /* Nothing to be done. */
2315 amt = count * sizeof (arelent);
2316 reloc_cache = (arelent *) bfd_zmalloc (amt);
2317 if (reloc_cache == NULL)
2320 relocs = bfd_malloc (reloc_size);
2327 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2334 cache_ptr = reloc_cache;
2335 if (each_size == RELOC_EXT_SIZE)
2337 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2339 for (; counter < count; counter++, rptr++, cache_ptr++)
2340 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2341 (bfd_size_type) bfd_get_symcount (abfd));
2345 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2347 for (; counter < count; counter++, rptr++, cache_ptr++)
2348 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2349 (bfd_size_type) bfd_get_symcount (abfd));
2354 asect->relocation = reloc_cache;
2355 asect->reloc_count = cache_ptr - reloc_cache;
2360 /* Write out a relocation section into an object file. */
2363 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2366 unsigned char *native, *natptr;
2369 unsigned int count = section->reloc_count;
2370 bfd_size_type natsize;
2372 if (count == 0 || section->orelocation == NULL)
2375 each_size = obj_reloc_entry_size (abfd);
2376 natsize = (bfd_size_type) each_size * count;
2377 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2381 generic = section->orelocation;
2383 if (each_size == RELOC_EXT_SIZE)
2385 for (natptr = native;
2387 --count, natptr += each_size, ++generic)
2388 MY_swap_ext_reloc_out (abfd, *generic,
2389 (struct reloc_ext_external *) natptr);
2393 for (natptr = native;
2395 --count, natptr += each_size, ++generic)
2396 MY_swap_std_reloc_out (abfd, *generic,
2397 (struct reloc_std_external *) natptr);
2400 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2402 bfd_release (abfd, native);
2405 bfd_release (abfd, native);
2410 /* This is stupid. This function should be a boolean predicate. */
2413 NAME (aout, canonicalize_reloc) (bfd *abfd,
2418 arelent *tblptr = section->relocation;
2421 if (section == obj_bsssec (abfd))
2427 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2430 if (section->flags & SEC_CONSTRUCTOR)
2432 arelent_chain *chain = section->constructor_chain;
2433 for (count = 0; count < section->reloc_count; count ++)
2435 *relptr ++ = &chain->relent;
2436 chain = chain->next;
2441 tblptr = section->relocation;
2443 for (count = 0; count++ < section->reloc_count; )
2445 *relptr++ = tblptr++;
2450 return section->reloc_count;
2454 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2456 if (bfd_get_format (abfd) != bfd_object)
2458 bfd_set_error (bfd_error_invalid_operation);
2462 if (asect->flags & SEC_CONSTRUCTOR)
2463 return sizeof (arelent *) * (asect->reloc_count + 1);
2465 if (asect == obj_datasec (abfd))
2466 return sizeof (arelent *)
2467 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2470 if (asect == obj_textsec (abfd))
2471 return sizeof (arelent *)
2472 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2475 if (asect == obj_bsssec (abfd))
2476 return sizeof (arelent *);
2478 if (asect == obj_bsssec (abfd))
2481 bfd_set_error (bfd_error_invalid_operation);
2486 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2488 if (!NAME (aout, slurp_symbol_table) (abfd))
2491 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2495 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2496 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2502 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2506 bfd_symbol_info (symbol, ret);
2508 if (ret->type == '?')
2510 int type_code = aout_symbol (symbol)->type & 0xff;
2511 const char *stab_name = bfd_get_stab_name (type_code);
2512 static char buf[10];
2514 if (stab_name == NULL)
2516 sprintf (buf, "(%d)", type_code);
2520 ret->stab_type = type_code;
2521 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2522 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2523 ret->stab_name = stab_name;
2528 NAME (aout, print_symbol) (bfd *abfd,
2531 bfd_print_symbol_type how)
2533 FILE *file = (FILE *)afile;
2537 case bfd_print_symbol_name:
2539 fprintf (file,"%s", symbol->name);
2541 case bfd_print_symbol_more:
2542 fprintf (file,"%4x %2x %2x",
2543 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2544 (unsigned) (aout_symbol (symbol)->other & 0xff),
2545 (unsigned) (aout_symbol (symbol)->type));
2547 case bfd_print_symbol_all:
2549 const char *section_name = symbol->section->name;
2551 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2553 fprintf (file," %-5s %04x %02x %02x",
2555 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2556 (unsigned) (aout_symbol (symbol)->other & 0xff),
2557 (unsigned) (aout_symbol (symbol)->type & 0xff));
2559 fprintf (file," %s", symbol->name);
2565 /* If we don't have to allocate more than 1MB to hold the generic
2566 symbols, we use the generic minisymbol methord: it's faster, since
2567 it only translates the symbols once, not multiple times. */
2568 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2570 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2571 symbols. The minisymbol_to_symbol function translates these into
2572 BFD asymbol structures. */
2575 NAME (aout, read_minisymbols) (bfd *abfd,
2576 bfd_boolean dynamic,
2578 unsigned int *sizep)
2581 /* We could handle the dynamic symbols here as well, but it's
2582 easier to hand them off. */
2583 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2585 if (! aout_get_external_symbols (abfd))
2588 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2589 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2591 *minisymsp = (void *) obj_aout_external_syms (abfd);
2593 /* By passing the external symbols back from this routine, we are
2594 giving up control over the memory block. Clear
2595 obj_aout_external_syms, so that we do not try to free it
2597 obj_aout_external_syms (abfd) = NULL;
2599 *sizep = EXTERNAL_NLIST_SIZE;
2600 return obj_aout_external_sym_count (abfd);
2603 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2604 unmodified a.out symbol. The SYM argument is a structure returned
2605 by bfd_make_empty_symbol, which we fill in here. */
2608 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2609 bfd_boolean dynamic,
2610 const void * minisym,
2614 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2615 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2617 memset (sym, 0, sizeof (aout_symbol_type));
2619 /* We call translate_symbol_table to translate a single symbol. */
2620 if (! (NAME (aout, translate_symbol_table)
2622 (aout_symbol_type *) sym,
2623 (struct external_nlist *) minisym,
2625 obj_aout_external_strings (abfd),
2626 obj_aout_external_string_size (abfd),
2633 /* Provided a BFD, a section and an offset into the section, calculate
2634 and return the name of the source file and the line nearest to the
2638 NAME (aout, find_nearest_line) (bfd *abfd,
2642 const char **filename_ptr,
2643 const char **functionname_ptr,
2644 unsigned int *line_ptr)
2646 /* Run down the file looking for the filename, function and linenumber. */
2648 const char *directory_name = NULL;
2649 const char *main_file_name = NULL;
2650 const char *current_file_name = NULL;
2651 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2652 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2653 bfd_vma low_line_vma = 0;
2654 bfd_vma low_func_vma = 0;
2656 bfd_size_type filelen, funclen;
2659 *filename_ptr = abfd->filename;
2660 *functionname_ptr = 0;
2663 if (symbols != NULL)
2665 for (p = symbols; *p; p++)
2667 aout_symbol_type *q = (aout_symbol_type *) (*p);
2672 /* If this looks like a file name symbol, and it comes after
2673 the line number we have found so far, but before the
2674 offset, then we have probably not found the right line
2676 if (q->symbol.value <= offset
2677 && ((q->symbol.value > low_line_vma
2678 && (line_file_name != NULL
2680 || (q->symbol.value > low_func_vma
2683 const char *symname;
2685 symname = q->symbol.name;
2686 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2688 if (q->symbol.value > low_line_vma)
2691 line_file_name = NULL;
2693 if (q->symbol.value > low_func_vma)
2700 /* If this symbol is less than the offset, but greater than
2701 the line number we have found so far, then we have not
2702 found the right line number. */
2703 if (q->symbol.value <= offset)
2705 if (q->symbol.value > low_line_vma)
2708 line_file_name = NULL;
2710 if (q->symbol.value > low_func_vma)
2714 main_file_name = current_file_name = q->symbol.name;
2715 /* Look ahead to next symbol to check if that too is an N_SO. */
2719 q = (aout_symbol_type *) (*p);
2720 if (q->type != (int)N_SO)
2723 /* Found a second N_SO First is directory; second is filename. */
2724 directory_name = current_file_name;
2725 main_file_name = current_file_name = q->symbol.name;
2726 if (obj_textsec (abfd) != section)
2730 current_file_name = q->symbol.name;
2737 /* We'll keep this if it resolves nearer than the one we have
2739 if (q->symbol.value >= low_line_vma
2740 && q->symbol.value <= offset)
2742 *line_ptr = q->desc;
2743 low_line_vma = q->symbol.value;
2744 line_file_name = current_file_name;
2745 line_directory_name = directory_name;
2750 /* We'll keep this if it is nearer than the one we have already. */
2751 if (q->symbol.value >= low_func_vma &&
2752 q->symbol.value <= offset)
2754 low_func_vma = q->symbol.value;
2755 func = (asymbol *)q;
2757 else if (q->symbol.value > offset)
2768 main_file_name = line_file_name;
2769 directory_name = line_directory_name;
2772 if (main_file_name == NULL
2773 || IS_ABSOLUTE_PATH (main_file_name)
2774 || directory_name == NULL)
2777 filelen = strlen (directory_name) + strlen (main_file_name);
2782 funclen = strlen (bfd_asymbol_name (func));
2784 if (adata (abfd).line_buf != NULL)
2785 free (adata (abfd).line_buf);
2787 if (filelen + funclen == 0)
2788 adata (abfd).line_buf = buf = NULL;
2791 buf = (char *) bfd_malloc (filelen + funclen + 3);
2792 adata (abfd).line_buf = buf;
2797 if (main_file_name != NULL)
2799 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2800 *filename_ptr = main_file_name;
2803 sprintf (buf, "%s%s", directory_name, main_file_name);
2804 *filename_ptr = buf;
2811 const char *function = func->name;
2814 /* The caller expects a symbol name. We actually have a
2815 function name, without the leading underscore. Put the
2816 underscore back in, so that the caller gets a symbol name. */
2817 if (bfd_get_symbol_leading_char (abfd) == '\0')
2818 strcpy (buf, function);
2821 buf[0] = bfd_get_symbol_leading_char (abfd);
2822 strcpy (buf + 1, function);
2824 /* Have to remove : stuff. */
2825 colon = strchr (buf, ':');
2828 *functionname_ptr = buf;
2835 NAME (aout, sizeof_headers) (bfd *abfd,
2836 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2838 return adata (abfd).exec_bytes_size;
2841 /* Free all information we have cached for this BFD. We can always
2842 read it again later if we need it. */
2845 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2849 if (bfd_get_format (abfd) != bfd_object
2850 || abfd->tdata.aout_data == NULL)
2853 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2854 BFCI_FREE (obj_aout_symbols (abfd));
2856 obj_aout_external_syms (abfd) = 0;
2857 bfd_free_window (&obj_aout_sym_window (abfd));
2858 bfd_free_window (&obj_aout_string_window (abfd));
2859 obj_aout_external_strings (abfd) = 0;
2861 BFCI_FREE (obj_aout_external_syms (abfd));
2862 BFCI_FREE (obj_aout_external_strings (abfd));
2864 for (o = abfd->sections; o != NULL; o = o->next)
2865 BFCI_FREE (o->relocation);
2871 /* a.out link code. */
2873 /* Routine to create an entry in an a.out link hash table. */
2875 struct bfd_hash_entry *
2876 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2877 struct bfd_hash_table *table,
2880 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2882 /* Allocate the structure if it has not already been allocated by a
2885 ret = (struct aout_link_hash_entry *) bfd_hash_allocate (table,
2890 /* Call the allocation method of the superclass. */
2891 ret = ((struct aout_link_hash_entry *)
2892 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2896 /* Set local fields. */
2897 ret->written = FALSE;
2901 return (struct bfd_hash_entry *) ret;
2904 /* Initialize an a.out link hash table. */
2907 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2909 struct bfd_hash_entry *(*newfunc)
2910 (struct bfd_hash_entry *, struct bfd_hash_table *,
2912 unsigned int entsize)
2914 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2917 /* Create an a.out link hash table. */
2919 struct bfd_link_hash_table *
2920 NAME (aout, link_hash_table_create) (bfd *abfd)
2922 struct aout_link_hash_table *ret;
2923 bfd_size_type amt = sizeof (* ret);
2925 ret = (struct aout_link_hash_table *) bfd_malloc (amt);
2929 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2930 NAME (aout, link_hash_newfunc),
2931 sizeof (struct aout_link_hash_entry)))
2939 /* Add all symbols from an object file to the hash table. */
2942 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2944 bfd_boolean (*add_one_symbol)
2945 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2946 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2947 struct bfd_link_hash_entry **);
2948 struct external_nlist *syms;
2949 bfd_size_type sym_count;
2952 struct aout_link_hash_entry **sym_hash;
2953 struct external_nlist *p;
2954 struct external_nlist *pend;
2957 syms = obj_aout_external_syms (abfd);
2958 sym_count = obj_aout_external_sym_count (abfd);
2959 strings = obj_aout_external_strings (abfd);
2960 if (info->keep_memory)
2965 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2967 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2968 (abfd, info, &syms, &sym_count, &strings)))
2973 return TRUE; /* Nothing to do. */
2975 /* We keep a list of the linker hash table entries that correspond
2976 to particular symbols. We could just look them up in the hash
2977 table, but keeping the list is more efficient. Perhaps this
2978 should be conditional on info->keep_memory. */
2979 amt = sym_count * sizeof (struct aout_link_hash_entry *);
2980 sym_hash = (struct aout_link_hash_entry **) bfd_alloc (abfd, amt);
2981 if (sym_hash == NULL)
2983 obj_aout_sym_hashes (abfd) = sym_hash;
2985 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
2986 if (add_one_symbol == NULL)
2987 add_one_symbol = _bfd_generic_link_add_one_symbol;
2990 pend = p + sym_count;
2991 for (; p < pend; p++, sym_hash++)
3002 type = H_GET_8 (abfd, p->e_type);
3004 /* Ignore debugging symbols. */
3005 if ((type & N_STAB) != 0)
3008 name = strings + GET_WORD (abfd, p->e_strx);
3009 value = GET_WORD (abfd, p->e_value);
3026 /* Ignore symbols that are not externally visible. */
3029 /* Ignore local indirect symbol. */
3034 case N_UNDF | N_EXT:
3037 section = bfd_und_section_ptr;
3041 section = bfd_com_section_ptr;
3044 section = bfd_abs_section_ptr;
3046 case N_TEXT | N_EXT:
3047 section = obj_textsec (abfd);
3048 value -= bfd_get_section_vma (abfd, section);
3050 case N_DATA | N_EXT:
3051 case N_SETV | N_EXT:
3052 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3053 translate_from_native_sym_flags. */
3054 section = obj_datasec (abfd);
3055 value -= bfd_get_section_vma (abfd, section);
3058 section = obj_bsssec (abfd);
3059 value -= bfd_get_section_vma (abfd, section);
3061 case N_INDR | N_EXT:
3062 /* An indirect symbol. The next symbol is the symbol
3063 which this one really is. */
3064 BFD_ASSERT (p + 1 < pend);
3066 string = strings + GET_WORD (abfd, p->e_strx);
3067 section = bfd_ind_section_ptr;
3068 flags |= BSF_INDIRECT;
3070 case N_COMM | N_EXT:
3071 section = bfd_com_section_ptr;
3073 case N_SETA: case N_SETA | N_EXT:
3074 section = bfd_abs_section_ptr;
3075 flags |= BSF_CONSTRUCTOR;
3077 case N_SETT: case N_SETT | N_EXT:
3078 section = obj_textsec (abfd);
3079 flags |= BSF_CONSTRUCTOR;
3080 value -= bfd_get_section_vma (abfd, section);
3082 case N_SETD: case N_SETD | N_EXT:
3083 section = obj_datasec (abfd);
3084 flags |= BSF_CONSTRUCTOR;
3085 value -= bfd_get_section_vma (abfd, section);
3087 case N_SETB: case N_SETB | N_EXT:
3088 section = obj_bsssec (abfd);
3089 flags |= BSF_CONSTRUCTOR;
3090 value -= bfd_get_section_vma (abfd, section);
3093 /* A warning symbol. The next symbol is the one to warn
3094 about. If there is no next symbol, just look away. */
3099 name = strings + GET_WORD (abfd, p->e_strx);
3100 section = bfd_und_section_ptr;
3101 flags |= BSF_WARNING;
3104 section = bfd_und_section_ptr;
3108 section = bfd_abs_section_ptr;
3112 section = obj_textsec (abfd);
3113 value -= bfd_get_section_vma (abfd, section);
3117 section = obj_datasec (abfd);
3118 value -= bfd_get_section_vma (abfd, section);
3122 section = obj_bsssec (abfd);
3123 value -= bfd_get_section_vma (abfd, section);
3128 if (! ((*add_one_symbol)
3129 (info, abfd, name, flags, section, value, string, copy, FALSE,
3130 (struct bfd_link_hash_entry **) sym_hash)))
3133 /* Restrict the maximum alignment of a common symbol based on
3134 the architecture, since a.out has no way to represent
3135 alignment requirements of a section in a .o file. FIXME:
3136 This isn't quite right: it should use the architecture of the
3137 output file, not the input files. */
3138 if ((*sym_hash)->root.type == bfd_link_hash_common
3139 && ((*sym_hash)->root.u.c.p->alignment_power >
3140 bfd_get_arch_info (abfd)->section_align_power))
3141 (*sym_hash)->root.u.c.p->alignment_power =
3142 bfd_get_arch_info (abfd)->section_align_power;
3144 /* If this is a set symbol, and we are not building sets, then
3145 it is possible for the hash entry to not have been set. In
3146 such a case, treat the symbol as not globally defined. */
3147 if ((*sym_hash)->root.type == bfd_link_hash_new)
3149 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3153 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3160 /* Free up the internal symbols read from an a.out file. */
3163 aout_link_free_symbols (bfd *abfd)
3165 if (obj_aout_external_syms (abfd) != NULL)
3168 bfd_free_window (&obj_aout_sym_window (abfd));
3170 free ((void *) obj_aout_external_syms (abfd));
3172 obj_aout_external_syms (abfd) = NULL;
3174 if (obj_aout_external_strings (abfd) != NULL)
3177 bfd_free_window (&obj_aout_string_window (abfd));
3179 free ((void *) obj_aout_external_strings (abfd));
3181 obj_aout_external_strings (abfd) = NULL;
3186 /* Add symbols from an a.out object file. */
3189 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3191 if (! aout_get_external_symbols (abfd))
3193 if (! aout_link_add_symbols (abfd, info))
3195 if (! info->keep_memory)
3197 if (! aout_link_free_symbols (abfd))
3203 /* Look through the internal symbols to see if this object file should
3204 be included in the link. We should include this object file if it
3205 defines any symbols which are currently undefined. If this object
3206 file defines a common symbol, then we may adjust the size of the
3207 known symbol but we do not include the object file in the link
3208 (unless there is some other reason to include it). */
3211 aout_link_check_ar_symbols (bfd *abfd,
3212 struct bfd_link_info *info,
3213 bfd_boolean *pneeded,
3216 struct external_nlist *p;
3217 struct external_nlist *pend;
3222 /* Look through all the symbols. */
3223 p = obj_aout_external_syms (abfd);
3224 pend = p + obj_aout_external_sym_count (abfd);
3225 strings = obj_aout_external_strings (abfd);
3226 for (; p < pend; p++)
3228 int type = H_GET_8 (abfd, p->e_type);
3230 struct bfd_link_hash_entry *h;
3232 /* Ignore symbols that are not externally visible. This is an
3233 optimization only, as we check the type more thoroughly
3235 if (((type & N_EXT) == 0
3236 || (type & N_STAB) != 0
3243 if (type == N_WARNING
3249 name = strings + GET_WORD (abfd, p->e_strx);
3250 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3252 /* We are only interested in symbols that are currently
3253 undefined or common. */
3255 || (h->type != bfd_link_hash_undefined
3256 && h->type != bfd_link_hash_common))
3258 if (type == (N_INDR | N_EXT))
3263 if (type == (N_TEXT | N_EXT)
3264 || type == (N_DATA | N_EXT)
3265 || type == (N_BSS | N_EXT)
3266 || type == (N_ABS | N_EXT)
3267 || type == (N_INDR | N_EXT))
3269 /* This object file defines this symbol. We must link it
3270 in. This is true regardless of whether the current
3271 definition of the symbol is undefined or common.
3273 If the current definition is common, we have a case in
3274 which we have already seen an object file including:
3276 and this object file from the archive includes:
3278 In such a case, whether to include this object is target
3279 dependant for backward compatibility.
3281 FIXME: The SunOS 4.1.3 linker will pull in the archive
3282 element if the symbol is defined in the .data section,
3283 but not if it is defined in the .text section. That
3284 seems a bit crazy to me, and it has not been implemented
3285 yet. However, it might be correct. */
3286 if (h->type == bfd_link_hash_common)
3290 switch (info->common_skip_ar_symbols)
3292 case bfd_link_common_skip_text:
3293 skip = (type == (N_TEXT | N_EXT));
3295 case bfd_link_common_skip_data:
3296 skip = (type == (N_DATA | N_EXT));
3299 case bfd_link_common_skip_all:
3308 if (!(*info->callbacks
3309 ->add_archive_element) (info, abfd, name, subsbfd))
3315 if (type == (N_UNDF | N_EXT))
3319 value = GET_WORD (abfd, p->e_value);
3322 /* This symbol is common in the object from the archive
3324 if (h->type == bfd_link_hash_undefined)
3329 symbfd = h->u.undef.abfd;
3332 /* This symbol was created as undefined from
3333 outside BFD. We assume that we should link
3334 in the object file. This is done for the -u
3335 option in the linker. */
3336 if (!(*info->callbacks
3337 ->add_archive_element) (info, abfd, name, subsbfd))
3342 /* Turn the current link symbol into a common
3343 symbol. It is already on the undefs list. */
3344 h->type = bfd_link_hash_common;
3345 h->u.c.p = (struct bfd_link_hash_common_entry *)
3346 bfd_hash_allocate (&info->hash->table,
3347 sizeof (struct bfd_link_hash_common_entry));
3348 if (h->u.c.p == NULL)
3351 h->u.c.size = value;
3353 /* FIXME: This isn't quite right. The maximum
3354 alignment of a common symbol should be set by the
3355 architecture of the output file, not of the input
3357 power = bfd_log2 (value);
3358 if (power > bfd_get_arch_info (abfd)->section_align_power)
3359 power = bfd_get_arch_info (abfd)->section_align_power;
3360 h->u.c.p->alignment_power = power;
3362 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3367 /* Adjust the size of the common symbol if
3369 if (value > h->u.c.size)
3370 h->u.c.size = value;
3380 /* This symbol is weak but defined. We must pull it in if
3381 the current link symbol is undefined, but we don't want
3382 it if the current link symbol is common. */
3383 if (h->type == bfd_link_hash_undefined)
3385 if (!(*info->callbacks
3386 ->add_archive_element) (info, abfd, name, subsbfd))
3394 /* We do not need this object file. */
3397 /* Check a single archive element to see if we need to include it in
3398 the link. *PNEEDED is set according to whether this element is
3399 needed in the link or not. This is called from
3400 _bfd_generic_link_add_archive_symbols. */
3403 aout_link_check_archive_element (bfd *abfd,
3404 struct bfd_link_info *info,
3405 bfd_boolean *pneeded)
3410 if (!aout_get_external_symbols (abfd))
3414 if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd))
3420 /* Potentially, the add_archive_element hook may have set a
3421 substitute BFD for us. */
3424 if (!info->keep_memory
3425 && !aout_link_free_symbols (oldbfd))
3427 if (!aout_get_external_symbols (abfd))
3430 if (!aout_link_add_symbols (abfd, info))
3434 if (!info->keep_memory || !needed)
3436 if (!aout_link_free_symbols (abfd))
3443 /* Given an a.out BFD, add symbols to the global hash table as
3447 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3449 switch (bfd_get_format (abfd))
3452 return aout_link_add_object_symbols (abfd, info);
3454 return _bfd_generic_link_add_archive_symbols
3455 (abfd, info, aout_link_check_archive_element);
3457 bfd_set_error (bfd_error_wrong_format);
3462 /* A hash table used for header files with N_BINCL entries. */
3464 struct aout_link_includes_table
3466 struct bfd_hash_table root;
3469 /* A linked list of totals that we have found for a particular header
3472 struct aout_link_includes_totals
3474 struct aout_link_includes_totals *next;
3478 /* An entry in the header file hash table. */
3480 struct aout_link_includes_entry
3482 struct bfd_hash_entry root;
3483 /* List of totals we have found for this file. */
3484 struct aout_link_includes_totals *totals;
3487 /* Look up an entry in an the header file hash table. */
3489 #define aout_link_includes_lookup(table, string, create, copy) \
3490 ((struct aout_link_includes_entry *) \
3491 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3493 /* During the final link step we need to pass around a bunch of
3494 information, so we do it in an instance of this structure. */
3496 struct aout_final_link_info
3498 /* General link information. */
3499 struct bfd_link_info *info;
3502 /* Reloc file positions. */
3503 file_ptr treloff, dreloff;
3504 /* File position of symbols. */
3507 struct bfd_strtab_hash *strtab;
3508 /* Header file hash table. */
3509 struct aout_link_includes_table includes;
3510 /* A buffer large enough to hold the contents of any section. */
3512 /* A buffer large enough to hold the relocs of any section. */
3514 /* A buffer large enough to hold the symbol map of any input BFD. */
3516 /* A buffer large enough to hold output symbols of any input BFD. */
3517 struct external_nlist *output_syms;
3520 /* The function to create a new entry in the header file hash table. */
3522 static struct bfd_hash_entry *
3523 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3524 struct bfd_hash_table *table,
3527 struct aout_link_includes_entry *ret =
3528 (struct aout_link_includes_entry *) entry;
3530 /* Allocate the structure if it has not already been allocated by a
3533 ret = (struct aout_link_includes_entry *)
3534 bfd_hash_allocate (table, sizeof (* ret));
3538 /* Call the allocation method of the superclass. */
3539 ret = ((struct aout_link_includes_entry *)
3540 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3543 /* Set local fields. */
3547 return (struct bfd_hash_entry *) ret;
3550 /* Write out a symbol that was not associated with an a.out input
3554 aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data)
3556 struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh;
3557 struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data;
3561 struct external_nlist outsym;
3565 if (h->root.type == bfd_link_hash_warning)
3567 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3568 if (h->root.type == bfd_link_hash_new)
3572 output_bfd = flaginfo->output_bfd;
3574 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3576 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3577 (output_bfd, flaginfo->info, h)))
3579 /* FIXME: No way to handle errors. */
3589 /* An indx of -2 means the symbol must be written. */
3591 && (flaginfo->info->strip == strip_all
3592 || (flaginfo->info->strip == strip_some
3593 && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string,
3594 FALSE, FALSE) == NULL)))
3597 switch (h->root.type)
3600 case bfd_link_hash_warning:
3602 /* Avoid variable not initialized warnings. */
3604 case bfd_link_hash_new:
3605 /* This can happen for set symbols when sets are not being
3608 case bfd_link_hash_undefined:
3609 type = N_UNDF | N_EXT;
3612 case bfd_link_hash_defined:
3613 case bfd_link_hash_defweak:
3617 sec = h->root.u.def.section->output_section;
3618 BFD_ASSERT (bfd_is_abs_section (sec)
3619 || sec->owner == output_bfd);
3620 if (sec == obj_textsec (output_bfd))
3621 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3622 else if (sec == obj_datasec (output_bfd))
3623 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3624 else if (sec == obj_bsssec (output_bfd))
3625 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3627 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3629 val = (h->root.u.def.value
3631 + h->root.u.def.section->output_offset);
3634 case bfd_link_hash_common:
3635 type = N_UNDF | N_EXT;
3636 val = h->root.u.c.size;
3638 case bfd_link_hash_undefweak:
3642 case bfd_link_hash_indirect:
3643 /* We ignore these symbols, since the indirected symbol is
3644 already in the hash table. */
3648 H_PUT_8 (output_bfd, type, outsym.e_type);
3649 H_PUT_8 (output_bfd, 0, outsym.e_other);
3650 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3651 indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string,
3653 if (indx == - (bfd_size_type) 1)
3654 /* FIXME: No way to handle errors. */
3657 PUT_WORD (output_bfd, indx, outsym.e_strx);
3658 PUT_WORD (output_bfd, val, outsym.e_value);
3660 amt = EXTERNAL_NLIST_SIZE;
3661 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0
3662 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3663 /* FIXME: No way to handle errors. */
3666 flaginfo->symoff += EXTERNAL_NLIST_SIZE;
3667 h->indx = obj_aout_external_sym_count (output_bfd);
3668 ++obj_aout_external_sym_count (output_bfd);
3673 /* Handle a link order which is supposed to generate a reloc. */
3676 aout_link_reloc_link_order (struct aout_final_link_info *flaginfo,
3678 struct bfd_link_order *p)
3680 struct bfd_link_order_reloc *pr;
3683 reloc_howto_type *howto;
3684 file_ptr *reloff_ptr = NULL;
3685 struct reloc_std_external srel;
3686 struct reloc_ext_external erel;
3692 if (p->type == bfd_section_reloc_link_order)
3695 if (bfd_is_abs_section (pr->u.section))
3696 r_index = N_ABS | N_EXT;
3699 BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd);
3700 r_index = pr->u.section->target_index;
3705 struct aout_link_hash_entry *h;
3707 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3709 h = ((struct aout_link_hash_entry *)
3710 bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info,
3711 pr->u.name, FALSE, FALSE, TRUE));
3717 /* We decided to strip this symbol, but it turns out that we
3718 can't. Note that we lose the other and desc information
3719 here. I don't think that will ever matter for a global
3723 if (!aout_link_write_other_symbol (&h->root.root, flaginfo))
3729 if (! ((*flaginfo->info->callbacks->unattached_reloc)
3730 (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0)))
3736 howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc);
3739 bfd_set_error (bfd_error_bad_value);
3743 if (o == obj_textsec (flaginfo->output_bfd))
3744 reloff_ptr = &flaginfo->treloff;
3745 else if (o == obj_datasec (flaginfo->output_bfd))
3746 reloff_ptr = &flaginfo->dreloff;
3750 if (obj_reloc_entry_size (flaginfo->output_bfd) == RELOC_STD_SIZE)
3753 MY_put_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset, howto,
3763 r_pcrel = (int) howto->pc_relative;
3764 r_baserel = (howto->type & 8) != 0;
3765 r_jmptable = (howto->type & 16) != 0;
3766 r_relative = (howto->type & 32) != 0;
3767 r_length = howto->size;
3769 PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address);
3770 if (bfd_header_big_endian (flaginfo->output_bfd))
3772 srel.r_index[0] = r_index >> 16;
3773 srel.r_index[1] = r_index >> 8;
3774 srel.r_index[2] = r_index;
3776 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3777 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3778 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3779 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3780 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3781 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3785 srel.r_index[2] = r_index >> 16;
3786 srel.r_index[1] = r_index >> 8;
3787 srel.r_index[0] = r_index;
3789 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3790 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3791 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3792 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3793 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3794 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3798 rel_ptr = (void *) &srel;
3800 /* We have to write the addend into the object file, since
3801 standard a.out relocs are in place. It would be more
3802 reliable if we had the current contents of the file here,
3803 rather than assuming zeroes, but we can't read the file since
3804 it was opened using bfd_openw. */
3805 if (pr->addend != 0)
3808 bfd_reloc_status_type r;
3812 size = bfd_get_reloc_size (howto);
3813 buf = (bfd_byte *) bfd_zmalloc (size);
3816 r = MY_relocate_contents (howto, flaginfo->output_bfd,
3817 (bfd_vma) pr->addend, buf);
3823 case bfd_reloc_outofrange:
3825 case bfd_reloc_overflow:
3826 if (! ((*flaginfo->info->callbacks->reloc_overflow)
3827 (flaginfo->info, NULL,
3828 (p->type == bfd_section_reloc_link_order
3829 ? bfd_section_name (flaginfo->output_bfd,
3832 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0)))
3839 ok = bfd_set_section_contents (flaginfo->output_bfd, o, (void *) buf,
3840 (file_ptr) p->offset, size);
3848 #ifdef MY_put_ext_reloc
3849 MY_put_ext_reloc (flaginfo->output_bfd, r_extern, r_index, p->offset,
3850 howto, &erel, pr->addend);
3852 PUT_WORD (flaginfo->output_bfd, p->offset, erel.r_address);
3854 if (bfd_header_big_endian (flaginfo->output_bfd))
3856 erel.r_index[0] = r_index >> 16;
3857 erel.r_index[1] = r_index >> 8;
3858 erel.r_index[2] = r_index;
3860 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3861 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3865 erel.r_index[2] = r_index >> 16;
3866 erel.r_index[1] = r_index >> 8;
3867 erel.r_index[0] = r_index;
3869 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3870 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3873 PUT_WORD (flaginfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3874 #endif /* MY_put_ext_reloc */
3876 rel_ptr = (void *) &erel;
3879 amt = obj_reloc_entry_size (flaginfo->output_bfd);
3880 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3881 || bfd_bwrite (rel_ptr, amt, flaginfo->output_bfd) != amt)
3884 *reloff_ptr += obj_reloc_entry_size (flaginfo->output_bfd);
3886 /* Assert that the relocs have not run into the symbols, and that n
3887 the text relocs have not run into the data relocs. */
3888 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
3889 && (reloff_ptr != &flaginfo->treloff
3891 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
3896 /* Get the section corresponding to a reloc index. */
3898 static INLINE asection *
3899 aout_reloc_index_to_section (bfd *abfd, int indx)
3901 switch (indx & N_TYPE)
3903 case N_TEXT: return obj_textsec (abfd);
3904 case N_DATA: return obj_datasec (abfd);
3905 case N_BSS: return obj_bsssec (abfd);
3907 case N_UNDF: return bfd_abs_section_ptr;
3913 /* Relocate an a.out section using standard a.out relocs. */
3916 aout_link_input_section_std (struct aout_final_link_info *flaginfo,
3918 asection *input_section,
3919 struct reloc_std_external *relocs,
3920 bfd_size_type rel_size,
3923 bfd_boolean (*check_dynamic_reloc)
3924 (struct bfd_link_info *, bfd *, asection *,
3925 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3928 bfd_boolean relocatable;
3929 struct external_nlist *syms;
3931 struct aout_link_hash_entry **sym_hashes;
3933 bfd_size_type reloc_count;
3934 struct reloc_std_external *rel;
3935 struct reloc_std_external *rel_end;
3937 output_bfd = flaginfo->output_bfd;
3938 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3940 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3941 BFD_ASSERT (input_bfd->xvec->header_byteorder
3942 == output_bfd->xvec->header_byteorder);
3944 relocatable = flaginfo->info->relocatable;
3945 syms = obj_aout_external_syms (input_bfd);
3946 strings = obj_aout_external_strings (input_bfd);
3947 sym_hashes = obj_aout_sym_hashes (input_bfd);
3948 symbol_map = flaginfo->symbol_map;
3950 reloc_count = rel_size / RELOC_STD_SIZE;
3952 rel_end = rel + reloc_count;
3953 for (; rel < rel_end; rel++)
3960 reloc_howto_type *howto;
3961 struct aout_link_hash_entry *h = NULL;
3963 bfd_reloc_status_type r;
3965 r_addr = GET_SWORD (input_bfd, rel->r_address);
3967 #ifdef MY_reloc_howto
3968 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
3974 unsigned int howto_idx;
3976 if (bfd_header_big_endian (input_bfd))
3978 r_index = (((unsigned int) rel->r_index[0] << 16)
3979 | ((unsigned int) rel->r_index[1] << 8)
3981 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
3982 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
3983 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
3984 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
3985 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
3986 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
3987 >> RELOC_STD_BITS_LENGTH_SH_BIG);
3991 r_index = (((unsigned int) rel->r_index[2] << 16)
3992 | ((unsigned int) rel->r_index[1] << 8)
3994 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
3995 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
3996 r_baserel = (0 != (rel->r_type[0]
3997 & RELOC_STD_BITS_BASEREL_LITTLE));
3998 r_jmptable= (0 != (rel->r_type[0]
3999 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4000 r_relative= (0 != (rel->r_type[0]
4001 & RELOC_STD_BITS_RELATIVE_LITTLE));
4002 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4003 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4006 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4007 + 16 * r_jmptable + 32 * r_relative);
4008 if (howto_idx < TABLE_SIZE (howto_table_std))
4009 howto = howto_table_std + howto_idx;
4017 (*flaginfo->info->callbacks->einfo)
4018 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4019 bfd_set_error (bfd_error_bad_value);
4025 /* We are generating a relocatable output file, and must
4026 modify the reloc accordingly. */
4029 /* If we know the symbol this relocation is against,
4030 convert it into a relocation against a section. This
4031 is what the native linker does. */
4032 h = sym_hashes[r_index];
4034 && (h->root.type == bfd_link_hash_defined
4035 || h->root.type == bfd_link_hash_defweak))
4037 asection *output_section;
4039 /* Change the r_extern value. */
4040 if (bfd_header_big_endian (output_bfd))
4041 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4043 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4045 /* Compute a new r_index. */
4046 output_section = h->root.u.def.section->output_section;
4047 if (output_section == obj_textsec (output_bfd))
4049 else if (output_section == obj_datasec (output_bfd))
4051 else if (output_section == obj_bsssec (output_bfd))
4056 /* Add the symbol value and the section VMA to the
4057 addend stored in the contents. */
4058 relocation = (h->root.u.def.value
4059 + output_section->vma
4060 + h->root.u.def.section->output_offset);
4064 /* We must change r_index according to the symbol
4066 r_index = symbol_map[r_index];
4072 /* We decided to strip this symbol, but it
4073 turns out that we can't. Note that we
4074 lose the other and desc information here.
4075 I don't think that will ever matter for a
4081 if (!aout_link_write_other_symbol (&h->root.root,
4091 name = strings + GET_WORD (input_bfd,
4092 syms[r_index].e_strx);
4093 if (! ((*flaginfo->info->callbacks->unattached_reloc)
4094 (flaginfo->info, name, input_bfd, input_section,
4104 /* Write out the new r_index value. */
4105 if (bfd_header_big_endian (output_bfd))
4107 rel->r_index[0] = r_index >> 16;
4108 rel->r_index[1] = r_index >> 8;
4109 rel->r_index[2] = r_index;
4113 rel->r_index[2] = r_index >> 16;
4114 rel->r_index[1] = r_index >> 8;
4115 rel->r_index[0] = r_index;
4122 /* This is a relocation against a section. We must
4123 adjust by the amount that the section moved. */
4124 section = aout_reloc_index_to_section (input_bfd, r_index);
4125 relocation = (section->output_section->vma
4126 + section->output_offset
4130 /* Change the address of the relocation. */
4131 PUT_WORD (output_bfd,
4132 r_addr + input_section->output_offset,
4135 /* Adjust a PC relative relocation by removing the reference
4136 to the original address in the section and including the
4137 reference to the new address. */
4139 relocation -= (input_section->output_section->vma
4140 + input_section->output_offset
4141 - input_section->vma);
4143 #ifdef MY_relocatable_reloc
4144 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4147 if (relocation == 0)
4150 r = MY_relocate_contents (howto,
4151 input_bfd, relocation,
4158 /* We are generating an executable, and must do a full
4164 h = sym_hashes[r_index];
4167 && (h->root.type == bfd_link_hash_defined
4168 || h->root.type == bfd_link_hash_defweak))
4170 relocation = (h->root.u.def.value
4171 + h->root.u.def.section->output_section->vma
4172 + h->root.u.def.section->output_offset);
4175 && h->root.type == bfd_link_hash_undefweak)
4187 section = aout_reloc_index_to_section (input_bfd, r_index);
4188 relocation = (section->output_section->vma
4189 + section->output_offset
4192 relocation += input_section->vma;
4195 if (check_dynamic_reloc != NULL)
4199 if (! ((*check_dynamic_reloc)
4200 (flaginfo->info, input_bfd, input_section, h,
4201 (void *) rel, contents, &skip, &relocation)))
4207 /* Now warn if a global symbol is undefined. We could not
4208 do this earlier, because check_dynamic_reloc might want
4209 to skip this reloc. */
4210 if (hundef && ! flaginfo->info->shared && ! r_baserel)
4215 name = h->root.root.string;
4217 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4218 if (! ((*flaginfo->info->callbacks->undefined_symbol)
4219 (flaginfo->info, name, input_bfd, input_section,
4224 r = MY_final_link_relocate (howto,
4225 input_bfd, input_section,
4226 contents, r_addr, relocation,
4230 if (r != bfd_reloc_ok)
4235 case bfd_reloc_outofrange:
4237 case bfd_reloc_overflow:
4244 name = strings + GET_WORD (input_bfd,
4245 syms[r_index].e_strx);
4250 s = aout_reloc_index_to_section (input_bfd, r_index);
4251 name = bfd_section_name (input_bfd, s);
4253 if (! ((*flaginfo->info->callbacks->reloc_overflow)
4254 (flaginfo->info, (h ? &h->root : NULL), name,
4255 howto->name, (bfd_vma) 0, input_bfd,
4256 input_section, r_addr)))
4267 /* Relocate an a.out section using extended a.out relocs. */
4270 aout_link_input_section_ext (struct aout_final_link_info *flaginfo,
4272 asection *input_section,
4273 struct reloc_ext_external *relocs,
4274 bfd_size_type rel_size,
4277 bfd_boolean (*check_dynamic_reloc)
4278 (struct bfd_link_info *, bfd *, asection *,
4279 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4282 bfd_boolean relocatable;
4283 struct external_nlist *syms;
4285 struct aout_link_hash_entry **sym_hashes;
4287 bfd_size_type reloc_count;
4288 struct reloc_ext_external *rel;
4289 struct reloc_ext_external *rel_end;
4291 output_bfd = flaginfo->output_bfd;
4292 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4294 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4295 BFD_ASSERT (input_bfd->xvec->header_byteorder
4296 == output_bfd->xvec->header_byteorder);
4298 relocatable = flaginfo->info->relocatable;
4299 syms = obj_aout_external_syms (input_bfd);
4300 strings = obj_aout_external_strings (input_bfd);
4301 sym_hashes = obj_aout_sym_hashes (input_bfd);
4302 symbol_map = flaginfo->symbol_map;
4304 reloc_count = rel_size / RELOC_EXT_SIZE;
4306 rel_end = rel + reloc_count;
4307 for (; rel < rel_end; rel++)
4312 unsigned int r_type;
4314 struct aout_link_hash_entry *h = NULL;
4315 asection *r_section = NULL;
4318 r_addr = GET_SWORD (input_bfd, rel->r_address);
4320 if (bfd_header_big_endian (input_bfd))
4322 r_index = (((unsigned int) rel->r_index[0] << 16)
4323 | ((unsigned int) rel->r_index[1] << 8)
4325 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4326 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4327 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4331 r_index = (((unsigned int) rel->r_index[2] << 16)
4332 | ((unsigned int) rel->r_index[1] << 8)
4334 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4335 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4336 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4339 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4341 if (r_type >= TABLE_SIZE (howto_table_ext))
4343 (*flaginfo->info->callbacks->einfo)
4344 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4345 bfd_set_error (bfd_error_bad_value);
4351 /* We are generating a relocatable output file, and must
4352 modify the reloc accordingly. */
4354 || r_type == (unsigned int) RELOC_BASE10
4355 || r_type == (unsigned int) RELOC_BASE13
4356 || r_type == (unsigned int) RELOC_BASE22)
4358 /* If we know the symbol this relocation is against,
4359 convert it into a relocation against a section. This
4360 is what the native linker does. */
4361 if (r_type == (unsigned int) RELOC_BASE10
4362 || r_type == (unsigned int) RELOC_BASE13
4363 || r_type == (unsigned int) RELOC_BASE22)
4366 h = sym_hashes[r_index];
4368 && (h->root.type == bfd_link_hash_defined
4369 || h->root.type == bfd_link_hash_defweak))
4371 asection *output_section;
4373 /* Change the r_extern value. */
4374 if (bfd_header_big_endian (output_bfd))
4375 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4377 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4379 /* Compute a new r_index. */
4380 output_section = h->root.u.def.section->output_section;
4381 if (output_section == obj_textsec (output_bfd))
4383 else if (output_section == obj_datasec (output_bfd))
4385 else if (output_section == obj_bsssec (output_bfd))
4390 /* Add the symbol value and the section VMA to the
4392 relocation = (h->root.u.def.value
4393 + output_section->vma
4394 + h->root.u.def.section->output_offset);
4396 /* Now RELOCATION is the VMA of the final
4397 destination. If this is a PC relative reloc,
4398 then ADDEND is the negative of the source VMA.
4399 We want to set ADDEND to the difference between
4400 the destination VMA and the source VMA, which
4401 means we must adjust RELOCATION by the change in
4402 the source VMA. This is done below. */
4406 /* We must change r_index according to the symbol
4408 r_index = symbol_map[r_index];
4414 /* We decided to strip this symbol, but it
4415 turns out that we can't. Note that we
4416 lose the other and desc information here.
4417 I don't think that will ever matter for a
4423 if (!aout_link_write_other_symbol (&h->root.root,
4433 name = strings + GET_WORD (input_bfd,
4434 syms[r_index].e_strx);
4435 if (! ((*flaginfo->info->callbacks->unattached_reloc)
4436 (flaginfo->info, name, input_bfd, input_section,
4445 /* If this is a PC relative reloc, then the addend
4446 is the negative of the source VMA. We must
4447 adjust it by the change in the source VMA. This
4451 /* Write out the new r_index value. */
4452 if (bfd_header_big_endian (output_bfd))
4454 rel->r_index[0] = r_index >> 16;
4455 rel->r_index[1] = r_index >> 8;
4456 rel->r_index[2] = r_index;
4460 rel->r_index[2] = r_index >> 16;
4461 rel->r_index[1] = r_index >> 8;
4462 rel->r_index[0] = r_index;
4467 /* This is a relocation against a section. We must
4468 adjust by the amount that the section moved. */
4469 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4470 relocation = (r_section->output_section->vma
4471 + r_section->output_offset
4474 /* If this is a PC relative reloc, then the addend is
4475 the difference in VMA between the destination and the
4476 source. We have just adjusted for the change in VMA
4477 of the destination, so we must also adjust by the
4478 change in VMA of the source. This is done below. */
4481 /* As described above, we must always adjust a PC relative
4482 reloc by the change in VMA of the source. However, if
4483 pcrel_offset is set, then the addend does not include the
4484 location within the section, in which case we don't need
4485 to adjust anything. */
4486 if (howto_table_ext[r_type].pc_relative
4487 && ! howto_table_ext[r_type].pcrel_offset)
4488 relocation -= (input_section->output_section->vma
4489 + input_section->output_offset
4490 - input_section->vma);
4492 /* Change the addend if necessary. */
4493 if (relocation != 0)
4494 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4496 /* Change the address of the relocation. */
4497 PUT_WORD (output_bfd,
4498 r_addr + input_section->output_offset,
4504 bfd_reloc_status_type r;
4506 /* We are generating an executable, and must do a full
4512 h = sym_hashes[r_index];
4515 && (h->root.type == bfd_link_hash_defined
4516 || h->root.type == bfd_link_hash_defweak))
4518 relocation = (h->root.u.def.value
4519 + h->root.u.def.section->output_section->vma
4520 + h->root.u.def.section->output_offset);
4523 && h->root.type == bfd_link_hash_undefweak)
4531 else if (r_type == (unsigned int) RELOC_BASE10
4532 || r_type == (unsigned int) RELOC_BASE13
4533 || r_type == (unsigned int) RELOC_BASE22)
4535 struct external_nlist *sym;
4538 /* For base relative relocs, r_index is always an index
4539 into the symbol table, even if r_extern is 0. */
4540 sym = syms + r_index;
4541 type = H_GET_8 (input_bfd, sym->e_type);
4542 if ((type & N_TYPE) == N_TEXT
4544 r_section = obj_textsec (input_bfd);
4545 else if ((type & N_TYPE) == N_DATA
4547 r_section = obj_datasec (input_bfd);
4548 else if ((type & N_TYPE) == N_BSS
4550 r_section = obj_bsssec (input_bfd);
4551 else if ((type & N_TYPE) == N_ABS
4553 r_section = bfd_abs_section_ptr;
4556 relocation = (r_section->output_section->vma
4557 + r_section->output_offset
4558 + (GET_WORD (input_bfd, sym->e_value)
4563 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4565 /* If this is a PC relative reloc, then R_ADDEND is the
4566 difference between the two vmas, or
4567 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4569 old_dest_sec == section->vma
4571 old_src_sec == input_section->vma
4573 old_src_off == r_addr
4575 _bfd_final_link_relocate expects RELOCATION +
4576 R_ADDEND to be the VMA of the destination minus
4577 r_addr (the minus r_addr is because this relocation
4578 is not pcrel_offset, which is a bit confusing and
4579 should, perhaps, be changed), or
4582 new_dest_sec == output_section->vma + output_offset
4583 We arrange for this to happen by setting RELOCATION to
4584 new_dest_sec + old_src_sec - old_dest_sec
4586 If this is not a PC relative reloc, then R_ADDEND is
4587 simply the VMA of the destination, so we set
4588 RELOCATION to the change in the destination VMA, or
4589 new_dest_sec - old_dest_sec
4591 relocation = (r_section->output_section->vma
4592 + r_section->output_offset
4594 if (howto_table_ext[r_type].pc_relative)
4595 relocation += input_section->vma;
4598 if (check_dynamic_reloc != NULL)
4602 if (! ((*check_dynamic_reloc)
4603 (flaginfo->info, input_bfd, input_section, h,
4604 (void *) rel, contents, &skip, &relocation)))
4610 /* Now warn if a global symbol is undefined. We could not
4611 do this earlier, because check_dynamic_reloc might want
4612 to skip this reloc. */
4614 && ! flaginfo->info->shared
4615 && r_type != (unsigned int) RELOC_BASE10
4616 && r_type != (unsigned int) RELOC_BASE13
4617 && r_type != (unsigned int) RELOC_BASE22)
4622 name = h->root.root.string;
4624 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4625 if (! ((*flaginfo->info->callbacks->undefined_symbol)
4626 (flaginfo->info, name, input_bfd, input_section,
4631 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4632 r = MY_final_link_relocate (howto_table_ext + r_type,
4633 input_bfd, input_section,
4634 contents, r_addr, relocation,
4640 x = bfd_get_32 (input_bfd, contents + r_addr);
4641 x = x + relocation + r_addend;
4642 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4646 if (r != bfd_reloc_ok)
4651 case bfd_reloc_outofrange:
4653 case bfd_reloc_overflow:
4660 || r_type == (unsigned int) RELOC_BASE10
4661 || r_type == (unsigned int) RELOC_BASE13
4662 || r_type == (unsigned int) RELOC_BASE22)
4663 name = strings + GET_WORD (input_bfd,
4664 syms[r_index].e_strx);
4669 s = aout_reloc_index_to_section (input_bfd, r_index);
4670 name = bfd_section_name (input_bfd, s);
4672 if (! ((*flaginfo->info->callbacks->reloc_overflow)
4673 (flaginfo->info, (h ? &h->root : NULL), name,
4674 howto_table_ext[r_type].name,
4675 r_addend, input_bfd, input_section, r_addr)))
4687 /* Link an a.out section into the output file. */
4690 aout_link_input_section (struct aout_final_link_info *flaginfo,
4692 asection *input_section,
4693 file_ptr *reloff_ptr,
4694 bfd_size_type rel_size)
4696 bfd_size_type input_size;
4699 /* Get the section contents. */
4700 input_size = input_section->size;
4701 if (! bfd_get_section_contents (input_bfd, input_section,
4702 (void *) flaginfo->contents,
4703 (file_ptr) 0, input_size))
4706 /* Read in the relocs if we haven't already done it. */
4707 if (aout_section_data (input_section) != NULL
4708 && aout_section_data (input_section)->relocs != NULL)
4709 relocs = aout_section_data (input_section)->relocs;
4712 relocs = flaginfo->relocs;
4715 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4716 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4721 /* Relocate the section contents. */
4722 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4724 if (! aout_link_input_section_std (flaginfo, input_bfd, input_section,
4725 (struct reloc_std_external *) relocs,
4726 rel_size, flaginfo->contents))
4731 if (! aout_link_input_section_ext (flaginfo, input_bfd, input_section,
4732 (struct reloc_ext_external *) relocs,
4733 rel_size, flaginfo->contents))
4737 /* Write out the section contents. */
4738 if (! bfd_set_section_contents (flaginfo->output_bfd,
4739 input_section->output_section,
4740 (void *) flaginfo->contents,
4741 (file_ptr) input_section->output_offset,
4745 /* If we are producing relocatable output, the relocs were
4746 modified, and we now write them out. */
4747 if (flaginfo->info->relocatable && rel_size > 0)
4749 if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4751 if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size)
4753 *reloff_ptr += rel_size;
4755 /* Assert that the relocs have not run into the symbols, and
4756 that if these are the text relocs they have not run into the
4758 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
4759 && (reloff_ptr != &flaginfo->treloff
4761 <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
4767 /* Adjust and write out the symbols for an a.out file. Set the new
4768 symbol indices into a symbol_map. */
4771 aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd)
4774 bfd_size_type sym_count;
4776 enum bfd_link_strip strip;
4777 enum bfd_link_discard discard;
4778 struct external_nlist *outsym;
4779 bfd_size_type strtab_index;
4780 struct external_nlist *sym;
4781 struct external_nlist *sym_end;
4782 struct aout_link_hash_entry **sym_hash;
4785 bfd_boolean skip_next;
4787 output_bfd = flaginfo->output_bfd;
4788 sym_count = obj_aout_external_sym_count (input_bfd);
4789 strings = obj_aout_external_strings (input_bfd);
4790 strip = flaginfo->info->strip;
4791 discard = flaginfo->info->discard;
4792 outsym = flaginfo->output_syms;
4794 /* First write out a symbol for this object file, unless we are
4795 discarding such symbols. */
4796 if (strip != strip_all
4797 && (strip != strip_some
4798 || bfd_hash_lookup (flaginfo->info->keep_hash, input_bfd->filename,
4799 FALSE, FALSE) != NULL)
4800 && discard != discard_all)
4802 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4803 H_PUT_8 (output_bfd, 0, outsym->e_other);
4804 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4805 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
4806 input_bfd->filename, FALSE);
4807 if (strtab_index == (bfd_size_type) -1)
4809 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4810 PUT_WORD (output_bfd,
4811 (bfd_get_section_vma (output_bfd,
4812 obj_textsec (input_bfd)->output_section)
4813 + obj_textsec (input_bfd)->output_offset),
4815 ++obj_aout_external_sym_count (output_bfd);
4821 sym = obj_aout_external_syms (input_bfd);
4822 sym_end = sym + sym_count;
4823 sym_hash = obj_aout_sym_hashes (input_bfd);
4824 symbol_map = flaginfo->symbol_map;
4825 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4826 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4830 struct aout_link_hash_entry *h;
4836 /* We set *symbol_map to 0 above for all symbols. If it has
4837 already been set to -1 for this symbol, it means that we are
4838 discarding it because it appears in a duplicate header file.
4839 See the N_BINCL code below. */
4840 if (*symbol_map == -1)
4843 /* Initialize *symbol_map to -1, which means that the symbol was
4844 not copied into the output file. We will change it later if
4845 we do copy the symbol over. */
4848 type = H_GET_8 (input_bfd, sym->e_type);
4849 name = strings + GET_WORD (input_bfd, sym->e_strx);
4855 /* Pass this symbol through. It is the target of an
4856 indirect or warning symbol. */
4857 val = GET_WORD (input_bfd, sym->e_value);
4862 /* Skip this symbol, which is the target of an indirect
4863 symbol that we have changed to no longer be an indirect
4870 struct aout_link_hash_entry *hresolve;
4872 /* We have saved the hash table entry for this symbol, if
4873 there is one. Note that we could just look it up again
4874 in the hash table, provided we first check that it is an
4878 /* Use the name from the hash table, in case the symbol was
4881 && h->root.type != bfd_link_hash_warning)
4882 name = h->root.root.string;
4884 /* If this is an indirect or warning symbol, then change
4885 hresolve to the base symbol. We also change *sym_hash so
4886 that the relocation routines relocate against the real
4889 if (h != (struct aout_link_hash_entry *) NULL
4890 && (h->root.type == bfd_link_hash_indirect
4891 || h->root.type == bfd_link_hash_warning))
4893 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4894 while (hresolve->root.type == bfd_link_hash_indirect
4895 || hresolve->root.type == bfd_link_hash_warning)
4896 hresolve = ((struct aout_link_hash_entry *)
4897 hresolve->root.u.i.link);
4898 *sym_hash = hresolve;
4901 /* If the symbol has already been written out, skip it. */
4905 if ((type & N_TYPE) == N_INDR
4906 || type == N_WARNING)
4908 *symbol_map = h->indx;
4912 /* See if we are stripping this symbol. */
4918 case strip_debugger:
4919 if ((type & N_STAB) != 0)
4923 if (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE, FALSE)
4938 /* Get the value of the symbol. */
4939 if ((type & N_TYPE) == N_TEXT
4941 symsec = obj_textsec (input_bfd);
4942 else if ((type & N_TYPE) == N_DATA
4944 symsec = obj_datasec (input_bfd);
4945 else if ((type & N_TYPE) == N_BSS
4947 symsec = obj_bsssec (input_bfd);
4948 else if ((type & N_TYPE) == N_ABS
4950 symsec = bfd_abs_section_ptr;
4951 else if (((type & N_TYPE) == N_INDR
4952 && (hresolve == NULL
4953 || (hresolve->root.type != bfd_link_hash_defined
4954 && hresolve->root.type != bfd_link_hash_defweak
4955 && hresolve->root.type != bfd_link_hash_common)))
4956 || type == N_WARNING)
4958 /* Pass the next symbol through unchanged. The
4959 condition above for indirect symbols is so that if
4960 the indirect symbol was defined, we output it with
4961 the correct definition so the debugger will
4964 val = GET_WORD (input_bfd, sym->e_value);
4967 else if ((type & N_STAB) != 0)
4969 val = GET_WORD (input_bfd, sym->e_value);
4974 /* If we get here with an indirect symbol, it means that
4975 we are outputting it with a real definition. In such
4976 a case we do not want to output the next symbol,
4977 which is the target of the indirection. */
4978 if ((type & N_TYPE) == N_INDR)
4983 /* We need to get the value from the hash table. We use
4984 hresolve so that if we have defined an indirect
4985 symbol we output the final definition. */
4988 switch (type & N_TYPE)
4991 symsec = obj_textsec (input_bfd);
4994 symsec = obj_datasec (input_bfd);
4997 symsec = obj_bsssec (input_bfd);
5000 symsec = bfd_abs_section_ptr;
5007 else if (hresolve->root.type == bfd_link_hash_defined
5008 || hresolve->root.type == bfd_link_hash_defweak)
5010 asection *input_section;
5011 asection *output_section;
5013 /* This case usually means a common symbol which was
5014 turned into a defined symbol. */
5015 input_section = hresolve->root.u.def.section;
5016 output_section = input_section->output_section;
5017 BFD_ASSERT (bfd_is_abs_section (output_section)
5018 || output_section->owner == output_bfd);
5019 val = (hresolve->root.u.def.value
5020 + bfd_get_section_vma (output_bfd, output_section)
5021 + input_section->output_offset);
5023 /* Get the correct type based on the section. If
5024 this is a constructed set, force it to be
5025 globally visible. */
5034 if (output_section == obj_textsec (output_bfd))
5035 type |= (hresolve->root.type == bfd_link_hash_defined
5038 else if (output_section == obj_datasec (output_bfd))
5039 type |= (hresolve->root.type == bfd_link_hash_defined
5042 else if (output_section == obj_bsssec (output_bfd))
5043 type |= (hresolve->root.type == bfd_link_hash_defined
5047 type |= (hresolve->root.type == bfd_link_hash_defined
5051 else if (hresolve->root.type == bfd_link_hash_common)
5052 val = hresolve->root.u.c.size;
5053 else if (hresolve->root.type == bfd_link_hash_undefweak)
5062 val = (symsec->output_section->vma
5063 + symsec->output_offset
5064 + (GET_WORD (input_bfd, sym->e_value)
5067 /* If this is a global symbol set the written flag, and if
5068 it is a local symbol see if we should discard it. */
5072 h->indx = obj_aout_external_sym_count (output_bfd);
5074 else if ((type & N_TYPE) != N_SETT
5075 && (type & N_TYPE) != N_SETD
5076 && (type & N_TYPE) != N_SETB
5077 && (type & N_TYPE) != N_SETA)
5082 case discard_sec_merge:
5085 if ((type & N_STAB) == 0
5086 && bfd_is_local_label_name (input_bfd, name))
5100 /* An N_BINCL symbol indicates the start of the stabs
5101 entries for a header file. We need to scan ahead to the
5102 next N_EINCL symbol, ignoring nesting, adding up all the
5103 characters in the symbol names, not including the file
5104 numbers in types (the first number after an open
5106 if (type == (int) N_BINCL)
5108 struct external_nlist *incl_sym;
5110 struct aout_link_includes_entry *incl_entry;
5111 struct aout_link_includes_totals *t;
5115 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5119 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5120 if (incl_type == (int) N_EINCL)
5126 else if (incl_type == (int) N_BINCL)
5132 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5133 for (; *s != '\0'; s++)
5138 /* Skip the file number. */
5140 while (ISDIGIT (*s))
5148 /* If we have already included a header file with the
5149 same value, then replace this one with an N_EXCL
5151 copy = (bfd_boolean) (! flaginfo->info->keep_memory);
5152 incl_entry = aout_link_includes_lookup (&flaginfo->includes,
5154 if (incl_entry == NULL)
5156 for (t = incl_entry->totals; t != NULL; t = t->next)
5157 if (t->total == val)
5161 /* This is the first time we have seen this header
5162 file with this set of stabs strings. */
5163 t = (struct aout_link_includes_totals *)
5164 bfd_hash_allocate (&flaginfo->includes.root,
5169 t->next = incl_entry->totals;
5170 incl_entry->totals = t;
5176 /* This is a duplicate header file. We must change
5177 it to be an N_EXCL entry, and mark all the
5178 included symbols to prevent outputting them. */
5179 type = (int) N_EXCL;
5182 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5184 incl_sym++, incl_map++)
5188 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5189 if (incl_type == (int) N_EINCL)
5198 else if (incl_type == (int) N_BINCL)
5207 /* Copy this symbol into the list of symbols we are going to
5209 H_PUT_8 (output_bfd, type, outsym->e_type);
5210 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5211 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5213 if (! flaginfo->info->keep_memory)
5215 /* name points into a string table which we are going to
5216 free. If there is a hash table entry, use that string.
5217 Otherwise, copy name into memory. */
5219 name = h->root.root.string;
5223 strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
5225 if (strtab_index == (bfd_size_type) -1)
5227 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5228 PUT_WORD (output_bfd, val, outsym->e_value);
5229 *symbol_map = obj_aout_external_sym_count (output_bfd);
5230 ++obj_aout_external_sym_count (output_bfd);
5234 /* Write out the output symbols we have just constructed. */
5235 if (outsym > flaginfo->output_syms)
5237 bfd_size_type outsym_size;
5239 if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0)
5241 outsym_size = outsym - flaginfo->output_syms;
5242 outsym_size *= EXTERNAL_NLIST_SIZE;
5243 if (bfd_bwrite ((void *) flaginfo->output_syms, outsym_size, output_bfd)
5246 flaginfo->symoff += outsym_size;
5252 /* Link an a.out input BFD into the output file. */
5255 aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd)
5257 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5259 /* If this is a dynamic object, it may need special handling. */
5260 if ((input_bfd->flags & DYNAMIC) != 0
5261 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5262 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5263 (flaginfo->info, input_bfd));
5265 /* Get the symbols. We probably have them already, unless
5266 flaginfo->info->keep_memory is FALSE. */
5267 if (! aout_get_external_symbols (input_bfd))
5270 /* Write out the symbols and get a map of the new indices. The map
5271 is placed into flaginfo->symbol_map. */
5272 if (! aout_link_write_symbols (flaginfo, input_bfd))
5275 /* Relocate and write out the sections. These functions use the
5276 symbol map created by aout_link_write_symbols. The linker_mark
5277 field will be set if these sections are to be included in the
5278 link, which will normally be the case. */
5279 if (obj_textsec (input_bfd)->linker_mark)
5281 if (! aout_link_input_section (flaginfo, input_bfd,
5282 obj_textsec (input_bfd),
5284 exec_hdr (input_bfd)->a_trsize))
5287 if (obj_datasec (input_bfd)->linker_mark)
5289 if (! aout_link_input_section (flaginfo, input_bfd,
5290 obj_datasec (input_bfd),
5292 exec_hdr (input_bfd)->a_drsize))
5296 /* If we are not keeping memory, we don't need the symbols any
5297 longer. We still need them if we are keeping memory, because the
5298 strings in the hash table point into them. */
5299 if (! flaginfo->info->keep_memory)
5301 if (! aout_link_free_symbols (input_bfd))
5308 /* Do the final link step. This is called on the output BFD. The
5309 INFO structure should point to a list of BFDs linked through the
5310 link_next field which can be used to find each BFD which takes part
5311 in the output. Also, each section in ABFD should point to a list
5312 of bfd_link_order structures which list all the input sections for
5313 the output section. */
5316 NAME (aout, final_link) (bfd *abfd,
5317 struct bfd_link_info *info,
5318 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5320 struct aout_final_link_info aout_info;
5321 bfd_boolean includes_hash_initialized = FALSE;
5323 bfd_size_type trsize, drsize;
5324 bfd_size_type max_contents_size;
5325 bfd_size_type max_relocs_size;
5326 bfd_size_type max_sym_count;
5327 bfd_size_type text_size;
5329 struct bfd_link_order *p;
5331 bfd_boolean have_link_order_relocs;
5334 abfd->flags |= DYNAMIC;
5336 aout_info.info = info;
5337 aout_info.output_bfd = abfd;
5338 aout_info.contents = NULL;
5339 aout_info.relocs = NULL;
5340 aout_info.symbol_map = NULL;
5341 aout_info.output_syms = NULL;
5343 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5344 aout_link_includes_newfunc,
5345 sizeof (struct aout_link_includes_entry),
5348 includes_hash_initialized = TRUE;
5350 /* Figure out the largest section size. Also, if generating
5351 relocatable output, count the relocs. */
5354 max_contents_size = 0;
5355 max_relocs_size = 0;
5357 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5361 if (info->relocatable)
5363 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5365 trsize += exec_hdr (sub)->a_trsize;
5366 drsize += exec_hdr (sub)->a_drsize;
5370 /* FIXME: We need to identify the .text and .data sections
5371 and call get_reloc_upper_bound and canonicalize_reloc to
5372 work out the number of relocs needed, and then multiply
5373 by the reloc size. */
5374 (*_bfd_error_handler)
5375 (_("%s: relocatable link from %s to %s not supported"),
5376 bfd_get_filename (abfd),
5377 sub->xvec->name, abfd->xvec->name);
5378 bfd_set_error (bfd_error_invalid_operation);
5383 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5385 sz = obj_textsec (sub)->size;
5386 if (sz > max_contents_size)
5387 max_contents_size = sz;
5388 sz = obj_datasec (sub)->size;
5389 if (sz > max_contents_size)
5390 max_contents_size = sz;
5392 sz = exec_hdr (sub)->a_trsize;
5393 if (sz > max_relocs_size)
5394 max_relocs_size = sz;
5395 sz = exec_hdr (sub)->a_drsize;
5396 if (sz > max_relocs_size)
5397 max_relocs_size = sz;
5399 sz = obj_aout_external_sym_count (sub);
5400 if (sz > max_sym_count)
5405 if (info->relocatable)
5407 if (obj_textsec (abfd) != NULL)
5408 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5409 ->map_head.link_order)
5410 * obj_reloc_entry_size (abfd));
5411 if (obj_datasec (abfd) != NULL)
5412 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5413 ->map_head.link_order)
5414 * obj_reloc_entry_size (abfd));
5417 exec_hdr (abfd)->a_trsize = trsize;
5418 exec_hdr (abfd)->a_drsize = drsize;
5420 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5422 /* Adjust the section sizes and vmas according to the magic number.
5423 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5424 filepos for each section. */
5425 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
5428 /* The relocation and symbol file positions differ among a.out
5429 targets. We are passed a callback routine from the backend
5430 specific code to handle this.
5431 FIXME: At this point we do not know how much space the symbol
5432 table will require. This will not work for any (nonstandard)
5433 a.out target that needs to know the symbol table size before it
5434 can compute the relocation file positions. This may or may not
5435 be the case for the hp300hpux target, for example. */
5436 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5438 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5439 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5440 obj_sym_filepos (abfd) = aout_info.symoff;
5442 /* We keep a count of the symbols as we output them. */
5443 obj_aout_external_sym_count (abfd) = 0;
5445 /* We accumulate the string table as we write out the symbols. */
5446 aout_info.strtab = _bfd_stringtab_init ();
5447 if (aout_info.strtab == NULL)
5450 /* Allocate buffers to hold section contents and relocs. */
5451 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
5452 aout_info.relocs = bfd_malloc (max_relocs_size);
5453 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int));
5454 aout_info.output_syms = (struct external_nlist *)
5455 bfd_malloc ((max_sym_count + 1) * sizeof (struct external_nlist));
5456 if ((aout_info.contents == NULL && max_contents_size != 0)
5457 || (aout_info.relocs == NULL && max_relocs_size != 0)
5458 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5459 || aout_info.output_syms == NULL)
5462 /* If we have a symbol named __DYNAMIC, force it out now. This is
5463 required by SunOS. Doing this here rather than in sunos.c is a
5464 hack, but it's easier than exporting everything which would be
5467 struct aout_link_hash_entry *h;
5469 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5470 FALSE, FALSE, FALSE);
5472 aout_link_write_other_symbol (&h->root.root, &aout_info);
5475 /* The most time efficient way to do the link would be to read all
5476 the input object files into memory and then sort out the
5477 information into the output file. Unfortunately, that will
5478 probably use too much memory. Another method would be to step
5479 through everything that composes the text section and write it
5480 out, and then everything that composes the data section and write
5481 it out, and then write out the relocs, and then write out the
5482 symbols. Unfortunately, that requires reading stuff from each
5483 input file several times, and we will not be able to keep all the
5484 input files open simultaneously, and reopening them will be slow.
5486 What we do is basically process one input file at a time. We do
5487 everything we need to do with an input file once--copy over the
5488 section contents, handle the relocation information, and write
5489 out the symbols--and then we throw away the information we read
5490 from it. This approach requires a lot of lseeks of the output
5491 file, which is unfortunate but still faster than reopening a lot
5494 We use the output_has_begun field of the input BFDs to see
5495 whether we have already handled it. */
5496 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5497 sub->output_has_begun = FALSE;
5499 /* Mark all sections which are to be included in the link. This
5500 will normally be every section. We need to do this so that we
5501 can identify any sections which the linker has decided to not
5503 for (o = abfd->sections; o != NULL; o = o->next)
5505 for (p = o->map_head.link_order; p != NULL; p = p->next)
5506 if (p->type == bfd_indirect_link_order)
5507 p->u.indirect.section->linker_mark = TRUE;
5510 have_link_order_relocs = FALSE;
5511 for (o = abfd->sections; o != NULL; o = o->next)
5513 for (p = o->map_head.link_order;
5517 if (p->type == bfd_indirect_link_order
5518 && (bfd_get_flavour (p->u.indirect.section->owner)
5519 == bfd_target_aout_flavour))
5523 input_bfd = p->u.indirect.section->owner;
5524 if (! input_bfd->output_has_begun)
5526 if (! aout_link_input_bfd (&aout_info, input_bfd))
5528 input_bfd->output_has_begun = TRUE;
5531 else if (p->type == bfd_section_reloc_link_order
5532 || p->type == bfd_symbol_reloc_link_order)
5534 /* These are handled below. */
5535 have_link_order_relocs = TRUE;
5539 if (! _bfd_default_link_order (abfd, info, o, p))
5545 /* Write out any symbols that we have not already written out. */
5546 bfd_hash_traverse (&info->hash->table,
5547 aout_link_write_other_symbol,
5550 /* Now handle any relocs we were asked to create by the linker.
5551 These did not come from any input file. We must do these after
5552 we have written out all the symbols, so that we know the symbol
5554 if (have_link_order_relocs)
5556 for (o = abfd->sections; o != NULL; o = o->next)
5558 for (p = o->map_head.link_order;
5562 if (p->type == bfd_section_reloc_link_order
5563 || p->type == bfd_symbol_reloc_link_order)
5565 if (! aout_link_reloc_link_order (&aout_info, o, p))
5572 if (aout_info.contents != NULL)
5574 free (aout_info.contents);
5575 aout_info.contents = NULL;
5577 if (aout_info.relocs != NULL)
5579 free (aout_info.relocs);
5580 aout_info.relocs = NULL;
5582 if (aout_info.symbol_map != NULL)
5584 free (aout_info.symbol_map);
5585 aout_info.symbol_map = NULL;
5587 if (aout_info.output_syms != NULL)
5589 free (aout_info.output_syms);
5590 aout_info.output_syms = NULL;
5592 if (includes_hash_initialized)
5594 bfd_hash_table_free (&aout_info.includes.root);
5595 includes_hash_initialized = FALSE;
5598 /* Finish up any dynamic linking we may be doing. */
5599 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5601 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5605 /* Update the header information. */
5606 abfd->symcount = obj_aout_external_sym_count (abfd);
5607 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5608 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5609 obj_textsec (abfd)->reloc_count =
5610 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5611 obj_datasec (abfd)->reloc_count =
5612 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5614 /* Write out the string table, unless there are no symbols. */
5615 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
5617 if (abfd->symcount > 0)
5619 if (!emit_stringtab (abfd, aout_info.strtab))
5624 bfd_byte b[BYTES_IN_WORD];
5626 memset (b, 0, BYTES_IN_WORD);
5627 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
5634 if (aout_info.contents != NULL)
5635 free (aout_info.contents);
5636 if (aout_info.relocs != NULL)
5637 free (aout_info.relocs);
5638 if (aout_info.symbol_map != NULL)
5639 free (aout_info.symbol_map);
5640 if (aout_info.output_syms != NULL)
5641 free (aout_info.output_syms);
5642 if (includes_hash_initialized)
5643 bfd_hash_table_free (&aout_info.includes.root);