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, 2009
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
30 BFD supports a number of different flavours of a.out format,
31 though the major differences are only the sizes of the
32 structures on disk, and the shape of the relocation
35 The support is split into a basic support file @file{aoutx.h}
36 and other files which derive functions from the base. One
37 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
38 adds to the basic a.out functions support for sun3, sun4, 386
39 and 29k a.out files, to create a target jump vector for a
42 This information is further split out into more specific files
43 for each machine, including @file{sunos.c} for sun3 and sun4,
44 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
45 demonstration of a 64 bit a.out format.
47 The base file @file{aoutx.h} defines general mechanisms for
48 reading and writing records to and from disk and various
49 other methods which BFD requires. It is included by
50 @file{aout32.c} and @file{aout64.c} to form the names
51 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
53 As an example, this is what goes on to make the back end for a
54 sun4, from @file{aout32.c}:
56 | #define ARCH_SIZE 32
62 | aout_32_canonicalize_reloc
63 | aout_32_find_nearest_line
65 | aout_32_get_reloc_upper_bound
70 | #define TARGET_NAME "a.out-sunos-big"
71 | #define VECNAME sunos_big_vec
74 requires all the names from @file{aout32.c}, and produces the jump vector
78 The file @file{host-aout.c} is a special case. It is for a large set
79 of hosts that use ``more or less standard'' a.out files, and
80 for which cross-debugging is not interesting. It uses the
81 standard 32-bit a.out support routines, but determines the
82 file offsets and addresses of the text, data, and BSS
83 sections, the machine architecture and machine type, and the
84 entry point address, in a host-dependent manner. Once these
85 values have been determined, generic code is used to handle
88 When porting it to run on a new system, you must supply:
92 | HOST_MACHINE_ARCH (optional)
93 | HOST_MACHINE_MACHINE (optional)
94 | HOST_TEXT_START_ADDR
97 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
98 values, plus the structures and macros defined in @file{a.out.h} on
99 your host system, will produce a BFD target that will access
100 ordinary a.out files on your host. To configure a new machine
101 to use @file{host-aout.c}, specify:
103 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
104 | TDEPFILES= host-aout.o trad-core.o
106 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
108 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
109 configuration is selected. */
112 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
113 Doesn't matter what the setting of WP_TEXT is on output, but it'll
115 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
116 * Any BFD with both flags clear is OMAGIC.
117 (Just want to make these explicit, so the conditions tested in this
118 file make sense if you're more familiar with a.out than with BFD.) */
120 #define KEEPIT udata.i
124 #include "safe-ctype.h"
129 #include "aout/aout64.h"
130 #include "aout/stab_gnu.h"
138 The file @file{aoutx.h} provides for both the @emph{standard}
139 and @emph{extended} forms of a.out relocation records.
141 The standard records contain only an
142 address, a symbol index, and a type field. The extended records
143 (used on 29ks and sparcs) also have a full integer for an
146 #ifndef CTOR_TABLE_RELOC_HOWTO
147 #define CTOR_TABLE_RELOC_IDX 2
148 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
149 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
150 ? howto_table_ext : howto_table_std) \
151 + CTOR_TABLE_RELOC_IDX)
154 #ifndef MY_swap_std_reloc_in
155 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
158 #ifndef MY_swap_ext_reloc_in
159 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
162 #ifndef MY_swap_std_reloc_out
163 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
166 #ifndef MY_swap_ext_reloc_out
167 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
170 #ifndef MY_final_link_relocate
171 #define MY_final_link_relocate _bfd_final_link_relocate
174 #ifndef MY_relocate_contents
175 #define MY_relocate_contents _bfd_relocate_contents
178 #define howto_table_ext NAME (aout, ext_howto_table)
179 #define howto_table_std NAME (aout, std_howto_table)
181 reloc_howto_type howto_table_ext[] =
183 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
184 HOWTO (RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", FALSE, 0, 0x000000ff, FALSE),
185 HOWTO (RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", FALSE, 0, 0x0000ffff, FALSE),
186 HOWTO (RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", FALSE, 0, 0xffffffff, FALSE),
187 HOWTO (RELOC_DISP8, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", FALSE, 0, 0x000000ff, FALSE),
188 HOWTO (RELOC_DISP16, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", FALSE, 0, 0x0000ffff, FALSE),
189 HOWTO (RELOC_DISP32, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", FALSE, 0, 0xffffffff, FALSE),
190 HOWTO (RELOC_WDISP30, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "WDISP30", FALSE, 0, 0x3fffffff, FALSE),
191 HOWTO (RELOC_WDISP22, 2, 2, 22, TRUE, 0, complain_overflow_signed, 0, "WDISP22", FALSE, 0, 0x003fffff, FALSE),
192 HOWTO (RELOC_HI22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "HI22", FALSE, 0, 0x003fffff, FALSE),
193 HOWTO (RELOC_22, 0, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "22", FALSE, 0, 0x003fffff, FALSE),
194 HOWTO (RELOC_13, 0, 2, 13, FALSE, 0, complain_overflow_bitfield, 0, "13", FALSE, 0, 0x00001fff, FALSE),
195 HOWTO (RELOC_LO10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "LO10", FALSE, 0, 0x000003ff, FALSE),
196 HOWTO (RELOC_SFA_BASE,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_BASE", FALSE, 0, 0xffffffff, FALSE),
197 HOWTO (RELOC_SFA_OFF13,0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "SFA_OFF13", FALSE, 0, 0xffffffff, FALSE),
198 HOWTO (RELOC_BASE10, 0, 2, 10, FALSE, 0, complain_overflow_dont, 0, "BASE10", FALSE, 0, 0x000003ff, FALSE),
199 HOWTO (RELOC_BASE13, 0, 2, 13, FALSE, 0, complain_overflow_signed, 0, "BASE13", FALSE, 0, 0x00001fff, FALSE),
200 HOWTO (RELOC_BASE22, 10, 2, 22, FALSE, 0, complain_overflow_bitfield, 0, "BASE22", FALSE, 0, 0x003fffff, FALSE),
201 HOWTO (RELOC_PC10, 0, 2, 10, TRUE, 0, complain_overflow_dont, 0, "PC10", FALSE, 0, 0x000003ff, TRUE),
202 HOWTO (RELOC_PC22, 10, 2, 22, TRUE, 0, complain_overflow_signed, 0, "PC22", FALSE, 0, 0x003fffff, TRUE),
203 HOWTO (RELOC_JMP_TBL, 2, 2, 30, TRUE, 0, complain_overflow_signed, 0, "JMP_TBL", FALSE, 0, 0x3fffffff, FALSE),
204 HOWTO (RELOC_SEGOFF16,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "SEGOFF16", FALSE, 0, 0x00000000, FALSE),
205 HOWTO (RELOC_GLOB_DAT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "GLOB_DAT", FALSE, 0, 0x00000000, FALSE),
206 HOWTO (RELOC_JMP_SLOT,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "JMP_SLOT", FALSE, 0, 0x00000000, FALSE),
207 HOWTO (RELOC_RELATIVE,0, 2, 0, FALSE, 0, complain_overflow_bitfield, 0, "RELATIVE", FALSE, 0, 0x00000000, FALSE),
208 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
209 HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, 0, "R_SPARC_NONE",FALSE, 0, 0x00000000, TRUE),
210 #define RELOC_SPARC_REV32 RELOC_WDISP19
211 HOWTO (RELOC_SPARC_REV32, 0, 2, 32, FALSE, 0, complain_overflow_dont, 0,"R_SPARC_REV32",FALSE, 0, 0xffffffff, FALSE),
214 /* Convert standard reloc records to "arelent" format (incl byte swap). */
216 reloc_howto_type howto_table_std[] =
218 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
219 HOWTO ( 0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,"8", TRUE, 0x000000ff,0x000000ff, FALSE),
220 HOWTO ( 1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
221 HOWTO ( 2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"32", TRUE, 0xffffffff,0xffffffff, FALSE),
222 HOWTO ( 3, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,0,"64", TRUE, 0xdeaddead,0xdeaddead, FALSE),
223 HOWTO ( 4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,"DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
224 HOWTO ( 5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,"DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
225 HOWTO ( 6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,"DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
226 HOWTO ( 7, 0, 4, 64, TRUE, 0, complain_overflow_signed, 0,"DISP64", TRUE, 0xfeedface,0xfeedface, FALSE),
227 HOWTO ( 8, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"GOT_REL", FALSE, 0,0x00000000, FALSE),
228 HOWTO ( 9, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,"BASE16", FALSE,0xffffffff,0xffffffff, FALSE),
229 HOWTO (10, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,"BASE32", FALSE,0xffffffff,0xffffffff, FALSE),
235 HOWTO (16, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"JMP_TABLE", FALSE, 0,0x00000000, FALSE),
251 HOWTO (32, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"RELATIVE", FALSE, 0,0x00000000, FALSE),
259 HOWTO (40, 0, 2, 0, FALSE, 0, complain_overflow_bitfield,0,"BASEREL", FALSE, 0,0x00000000, FALSE),
262 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
265 NAME (aout, reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
267 #define EXT(i, j) case i: return & howto_table_ext [j]
268 #define STD(i, j) case i: return & howto_table_std [j]
269 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
271 if (code == BFD_RELOC_CTOR)
272 switch (bfd_get_arch_info (abfd)->bits_per_address)
285 EXT (BFD_RELOC_8, 0);
286 EXT (BFD_RELOC_16, 1);
287 EXT (BFD_RELOC_32, 2);
288 EXT (BFD_RELOC_HI22, 8);
289 EXT (BFD_RELOC_LO10, 11);
290 EXT (BFD_RELOC_32_PCREL_S2, 6);
291 EXT (BFD_RELOC_SPARC_WDISP22, 7);
292 EXT (BFD_RELOC_SPARC13, 10);
293 EXT (BFD_RELOC_SPARC_GOT10, 14);
294 EXT (BFD_RELOC_SPARC_BASE13, 15);
295 EXT (BFD_RELOC_SPARC_GOT13, 15);
296 EXT (BFD_RELOC_SPARC_GOT22, 16);
297 EXT (BFD_RELOC_SPARC_PC10, 17);
298 EXT (BFD_RELOC_SPARC_PC22, 18);
299 EXT (BFD_RELOC_SPARC_WPLT30, 19);
300 EXT (BFD_RELOC_SPARC_REV32, 26);
308 STD (BFD_RELOC_8, 0);
309 STD (BFD_RELOC_16, 1);
310 STD (BFD_RELOC_32, 2);
311 STD (BFD_RELOC_8_PCREL, 4);
312 STD (BFD_RELOC_16_PCREL, 5);
313 STD (BFD_RELOC_32_PCREL, 6);
314 STD (BFD_RELOC_16_BASEREL, 9);
315 STD (BFD_RELOC_32_BASEREL, 10);
322 NAME (aout, reloc_name_lookup) (bfd *abfd, const char *r_name)
324 unsigned int i, size;
325 reloc_howto_type *howto_table;
327 if (obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE)
329 howto_table = howto_table_ext;
330 size = sizeof (howto_table_ext) / sizeof (howto_table_ext[0]);
334 howto_table = howto_table_std;
335 size = sizeof (howto_table_std) / sizeof (howto_table_std[0]);
338 for (i = 0; i < size; i++)
339 if (howto_table[i].name != NULL
340 && strcasecmp (howto_table[i].name, r_name) == 0)
341 return &howto_table[i];
348 Internal entry points
351 @file{aoutx.h} exports several routines for accessing the
352 contents of an a.out file, which are gathered and exported in
353 turn by various format specific files (eg sunos.c).
358 aout_@var{size}_swap_exec_header_in
361 void aout_@var{size}_swap_exec_header_in,
363 struct external_exec *bytes,
364 struct internal_exec *execp);
367 Swap the information in an executable header @var{raw_bytes} taken
368 from a raw byte stream memory image into the internal exec header
369 structure @var{execp}.
372 #ifndef NAME_swap_exec_header_in
374 NAME (aout, swap_exec_header_in) (bfd *abfd,
375 struct external_exec *bytes,
376 struct internal_exec *execp)
378 /* The internal_exec structure has some fields that are unused in this
379 configuration (IE for i960), so ensure that all such uninitialized
380 fields are zero'd out. There are places where two of these structs
381 are memcmp'd, and thus the contents do matter. */
382 memset ((void *) execp, 0, sizeof (struct internal_exec));
383 /* Now fill in fields in the execp, from the bytes in the raw data. */
384 execp->a_info = H_GET_32 (abfd, bytes->e_info);
385 execp->a_text = GET_WORD (abfd, bytes->e_text);
386 execp->a_data = GET_WORD (abfd, bytes->e_data);
387 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
388 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
389 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
390 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
391 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
393 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
398 aout_@var{size}_swap_exec_header_out
401 void aout_@var{size}_swap_exec_header_out
403 struct internal_exec *execp,
404 struct external_exec *raw_bytes);
407 Swap the information in an internal exec header structure
408 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
411 NAME (aout, swap_exec_header_out) (bfd *abfd,
412 struct internal_exec *execp,
413 struct external_exec *bytes)
415 /* Now fill in fields in the raw data, from the fields in the exec struct. */
416 H_PUT_32 (abfd, execp->a_info , bytes->e_info);
417 PUT_WORD (abfd, execp->a_text , bytes->e_text);
418 PUT_WORD (abfd, execp->a_data , bytes->e_data);
419 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
420 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
421 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
422 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
423 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
426 /* Make all the section for an a.out file. */
429 NAME (aout, make_sections) (bfd *abfd)
431 if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL)
433 if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL)
435 if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL)
442 aout_@var{size}_some_aout_object_p
445 const bfd_target *aout_@var{size}_some_aout_object_p
447 struct internal_exec *execp,
448 const bfd_target *(*callback_to_real_object_p) (bfd *));
451 Some a.out variant thinks that the file open in @var{abfd}
452 checking is an a.out file. Do some more checking, and set up
453 for access if it really is. Call back to the calling
454 environment's "finish up" function just before returning, to
455 handle any last-minute setup.
459 NAME (aout, some_aout_object_p) (bfd *abfd,
460 struct internal_exec *execp,
461 const bfd_target *(*callback_to_real_object_p) (bfd *))
463 struct aout_data_struct *rawptr, *oldrawptr;
464 const bfd_target *result;
465 bfd_size_type amt = sizeof (* rawptr);
467 rawptr = bfd_zalloc (abfd, amt);
471 oldrawptr = abfd->tdata.aout_data;
472 abfd->tdata.aout_data = rawptr;
474 /* Copy the contents of the old tdata struct.
475 In particular, we want the subformat, since for hpux it was set in
476 hp300hpux.c:swap_exec_header_in and will be used in
477 hp300hpux.c:callback. */
478 if (oldrawptr != NULL)
479 *abfd->tdata.aout_data = *oldrawptr;
481 abfd->tdata.aout_data->a.hdr = &rawptr->e;
482 /* Copy in the internal_exec struct. */
483 *(abfd->tdata.aout_data->a.hdr) = *execp;
484 execp = abfd->tdata.aout_data->a.hdr;
486 /* Set the file flags. */
487 abfd->flags = BFD_NO_FLAGS;
488 if (execp->a_drsize || execp->a_trsize)
489 abfd->flags |= HAS_RELOC;
490 /* Setting of EXEC_P has been deferred to the bottom of this function. */
492 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
493 if (N_DYNAMIC (*execp))
494 abfd->flags |= DYNAMIC;
496 if (N_MAGIC (*execp) == ZMAGIC)
498 abfd->flags |= D_PAGED | WP_TEXT;
499 adata (abfd).magic = z_magic;
501 else if (N_MAGIC (*execp) == QMAGIC)
503 abfd->flags |= D_PAGED | WP_TEXT;
504 adata (abfd).magic = z_magic;
505 adata (abfd).subformat = q_magic_format;
507 else if (N_MAGIC (*execp) == NMAGIC)
509 abfd->flags |= WP_TEXT;
510 adata (abfd).magic = n_magic;
512 else if (N_MAGIC (*execp) == OMAGIC
513 || N_MAGIC (*execp) == BMAGIC)
514 adata (abfd).magic = o_magic;
516 /* Should have been checked with N_BADMAG before this routine
520 bfd_get_start_address (abfd) = execp->a_entry;
522 obj_aout_symbols (abfd) = NULL;
523 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
525 /* The default relocation entry size is that of traditional V7 Unix. */
526 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
528 /* The default symbol entry size is that of traditional Unix. */
529 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
532 bfd_init_window (&obj_aout_sym_window (abfd));
533 bfd_init_window (&obj_aout_string_window (abfd));
535 obj_aout_external_syms (abfd) = NULL;
536 obj_aout_external_strings (abfd) = NULL;
537 obj_aout_sym_hashes (abfd) = NULL;
539 if (! NAME (aout, make_sections) (abfd))
542 obj_datasec (abfd)->size = execp->a_data;
543 obj_bsssec (abfd)->size = execp->a_bss;
545 obj_textsec (abfd)->flags =
546 (execp->a_trsize != 0
547 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
548 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
549 obj_datasec (abfd)->flags =
550 (execp->a_drsize != 0
551 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
552 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
553 obj_bsssec (abfd)->flags = SEC_ALLOC;
555 #ifdef THIS_IS_ONLY_DOCUMENTATION
556 /* The common code can't fill in these things because they depend
557 on either the start address of the text segment, the rounding
558 up of virtual addresses between segments, or the starting file
559 position of the text segment -- all of which varies among different
560 versions of a.out. */
562 /* Call back to the format-dependent code to fill in the rest of the
563 fields and do any further cleanup. Things that should be filled
564 in by the callback: */
566 struct exec *execp = exec_hdr (abfd);
568 obj_textsec (abfd)->size = N_TXTSIZE (*execp);
569 /* Data and bss are already filled in since they're so standard. */
571 /* The virtual memory addresses of the sections. */
572 obj_textsec (abfd)->vma = N_TXTADDR (*execp);
573 obj_datasec (abfd)->vma = N_DATADDR (*execp);
574 obj_bsssec (abfd)->vma = N_BSSADDR (*execp);
576 /* The file offsets of the sections. */
577 obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
578 obj_datasec (abfd)->filepos = N_DATOFF (*execp);
580 /* The file offsets of the relocation info. */
581 obj_textsec (abfd)->rel_filepos = N_TRELOFF (*execp);
582 obj_datasec (abfd)->rel_filepos = N_DRELOFF (*execp);
584 /* The file offsets of the string table and symbol table. */
585 obj_str_filepos (abfd) = N_STROFF (*execp);
586 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
588 /* Determine the architecture and machine type of the object file. */
589 switch (N_MACHTYPE (*exec_hdr (abfd)))
592 abfd->obj_arch = bfd_arch_obscure;
596 adata (abfd)->page_size = TARGET_PAGE_SIZE;
597 adata (abfd)->segment_size = SEGMENT_SIZE;
598 adata (abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
602 /* The architecture is encoded in various ways in various a.out variants,
603 or is not encoded at all in some of them. The relocation size depends
604 on the architecture and the a.out variant. Finally, the return value
605 is the bfd_target vector in use. If an error occurs, return zero and
606 set bfd_error to the appropriate error code.
608 Formats such as b.out, which have additional fields in the a.out
609 header, should cope with them in this callback as well. */
610 #endif /* DOCUMENTATION */
612 result = (*callback_to_real_object_p) (abfd);
614 /* Now that the segment addresses have been worked out, take a better
615 guess at whether the file is executable. If the entry point
616 is within the text segment, assume it is. (This makes files
617 executable even if their entry point address is 0, as long as
618 their text starts at zero.).
620 This test had to be changed to deal with systems where the text segment
621 runs at a different location than the default. The problem is that the
622 entry address can appear to be outside the text segment, thus causing an
623 erroneous conclusion that the file isn't executable.
625 To fix this, we now accept any non-zero entry point as an indication of
626 executability. This will work most of the time, since only the linker
627 sets the entry point, and that is likely to be non-zero for most systems. */
629 if (execp->a_entry != 0
630 || (execp->a_entry >= obj_textsec (abfd)->vma
631 && execp->a_entry < (obj_textsec (abfd)->vma
632 + obj_textsec (abfd)->size)))
633 abfd->flags |= EXEC_P;
637 struct stat stat_buf;
639 /* The original heuristic doesn't work in some important cases.
640 The a.out file has no information about the text start
641 address. For files (like kernels) linked to non-standard
642 addresses (ld -Ttext nnn) the entry point may not be between
643 the default text start (obj_textsec(abfd)->vma) and
644 (obj_textsec(abfd)->vma) + text size. This is not just a mach
645 issue. Many kernels are loaded at non standard addresses. */
646 if (abfd->iostream != NULL
647 && (abfd->flags & BFD_IN_MEMORY) == 0
648 && (fstat (fileno ((FILE *) (abfd->iostream)), &stat_buf) == 0)
649 && ((stat_buf.st_mode & 0111) != 0))
650 abfd->flags |= EXEC_P;
652 #endif /* STAT_FOR_EXEC */
658 bfd_release (abfd, rawptr);
659 abfd->tdata.aout_data = oldrawptr;
665 aout_@var{size}_mkobject
668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
671 Initialize BFD @var{abfd} for use with a.out files.
675 NAME (aout, mkobject) (bfd *abfd)
677 struct aout_data_struct *rawptr;
678 bfd_size_type amt = sizeof (* rawptr);
680 bfd_set_error (bfd_error_system_call);
682 rawptr = bfd_zalloc (abfd, amt);
686 abfd->tdata.aout_data = rawptr;
687 exec_hdr (abfd) = &(rawptr->e);
689 obj_textsec (abfd) = NULL;
690 obj_datasec (abfd) = NULL;
691 obj_bsssec (abfd) = NULL;
698 aout_@var{size}_machine_type
701 enum machine_type aout_@var{size}_machine_type
702 (enum bfd_architecture arch,
703 unsigned long machine,
704 bfd_boolean *unknown);
707 Keep track of machine architecture and machine type for
708 a.out's. Return the <<machine_type>> for a particular
709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
710 and machine can't be represented in a.out format.
712 If the architecture is understood, machine type 0 (default)
713 is always understood.
717 NAME (aout, machine_type) (enum bfd_architecture arch,
718 unsigned long machine,
719 bfd_boolean *unknown)
721 enum machine_type arch_flags;
723 arch_flags = M_UNKNOWN;
730 || machine == bfd_mach_sparc
731 || machine == bfd_mach_sparc_sparclite
732 || machine == bfd_mach_sparc_sparclite_le
733 || machine == bfd_mach_sparc_v8plus
734 || machine == bfd_mach_sparc_v8plusa
735 || machine == bfd_mach_sparc_v8plusb
736 || machine == bfd_mach_sparc_v9
737 || machine == bfd_mach_sparc_v9a
738 || machine == bfd_mach_sparc_v9b)
739 arch_flags = M_SPARC;
740 else if (machine == bfd_mach_sparc_sparclet)
741 arch_flags = M_SPARCLET;
747 case 0: arch_flags = M_68010; break;
748 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = FALSE; break;
749 case bfd_mach_m68010: arch_flags = M_68010; break;
750 case bfd_mach_m68020: arch_flags = M_68020; break;
751 default: arch_flags = M_UNKNOWN; break;
757 || machine == bfd_mach_i386_i386
758 || machine == bfd_mach_i386_i386_intel_syntax)
771 case bfd_mach_mips3000:
772 case bfd_mach_mips3900:
773 arch_flags = M_MIPS1;
775 case bfd_mach_mips6000:
776 arch_flags = M_MIPS2;
778 case bfd_mach_mips4000:
779 case bfd_mach_mips4010:
780 case bfd_mach_mips4100:
781 case bfd_mach_mips4300:
782 case bfd_mach_mips4400:
783 case bfd_mach_mips4600:
784 case bfd_mach_mips4650:
785 case bfd_mach_mips8000:
786 case bfd_mach_mips9000:
787 case bfd_mach_mips10000:
788 case bfd_mach_mips12000:
789 case bfd_mach_mips14000:
790 case bfd_mach_mips16000:
791 case bfd_mach_mips16:
792 case bfd_mach_mipsisa32:
793 case bfd_mach_mipsisa32r2:
795 case bfd_mach_mipsisa64:
796 case bfd_mach_mipsisa64r2:
797 case bfd_mach_mips_sb1:
798 case bfd_mach_mips_xlr:
799 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
800 arch_flags = M_MIPS2;
803 arch_flags = M_UNKNOWN;
811 case 0: arch_flags = M_NS32532; break;
812 case 32032: arch_flags = M_NS32032; break;
813 case 32532: arch_flags = M_NS32532; break;
814 default: arch_flags = M_UNKNOWN; break;
823 if (machine == 0 || machine == 255)
832 arch_flags = M_UNKNOWN;
835 if (arch_flags != M_UNKNOWN)
843 aout_@var{size}_set_arch_mach
846 bfd_boolean aout_@var{size}_set_arch_mach,
848 enum bfd_architecture arch,
849 unsigned long machine);
852 Set the architecture and the machine of the BFD @var{abfd} to the
853 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
854 can support the architecture required.
858 NAME (aout, set_arch_mach) (bfd *abfd,
859 enum bfd_architecture arch,
860 unsigned long machine)
862 if (! bfd_default_set_arch_mach (abfd, arch, machine))
865 if (arch != bfd_arch_unknown)
869 NAME (aout, machine_type) (arch, machine, &unknown);
874 /* Determine the size of a relocation entry. */
879 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
882 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
886 return (*aout_backend_info (abfd)->set_sizes) (abfd);
890 adjust_o_magic (bfd *abfd, struct internal_exec *execp)
892 file_ptr pos = adata (abfd).exec_bytes_size;
897 obj_textsec (abfd)->filepos = pos;
898 if (!obj_textsec (abfd)->user_set_vma)
899 obj_textsec (abfd)->vma = vma;
901 vma = obj_textsec (abfd)->vma;
903 pos += obj_textsec (abfd)->size;
904 vma += obj_textsec (abfd)->size;
907 if (!obj_datasec (abfd)->user_set_vma)
909 obj_textsec (abfd)->size += pad;
912 obj_datasec (abfd)->vma = vma;
915 vma = obj_datasec (abfd)->vma;
916 obj_datasec (abfd)->filepos = pos;
917 pos += obj_datasec (abfd)->size;
918 vma += obj_datasec (abfd)->size;
921 if (!obj_bsssec (abfd)->user_set_vma)
923 obj_datasec (abfd)->size += pad;
926 obj_bsssec (abfd)->vma = vma;
930 /* The VMA of the .bss section is set by the VMA of the
931 .data section plus the size of the .data section. We may
932 need to add padding bytes to make this true. */
933 pad = obj_bsssec (abfd)->vma - vma;
936 obj_datasec (abfd)->size += pad;
940 obj_bsssec (abfd)->filepos = pos;
942 /* Fix up the exec header. */
943 execp->a_text = obj_textsec (abfd)->size;
944 execp->a_data = obj_datasec (abfd)->size;
945 execp->a_bss = obj_bsssec (abfd)->size;
946 N_SET_MAGIC (*execp, OMAGIC);
950 adjust_z_magic (bfd *abfd, struct internal_exec *execp)
952 bfd_size_type data_pad, text_pad;
954 const struct aout_backend_data *abdp;
955 /* TRUE if text includes exec header. */
958 abdp = aout_backend_info (abfd);
962 && (abdp->text_includes_header
963 || obj_aout_subformat (abfd) == q_magic_format));
964 obj_textsec (abfd)->filepos = (ztih
965 ? adata (abfd).exec_bytes_size
966 : adata (abfd).zmagic_disk_block_size);
967 if (! obj_textsec (abfd)->user_set_vma)
969 /* ?? Do we really need to check for relocs here? */
970 obj_textsec (abfd)->vma = ((abfd->flags & HAS_RELOC)
973 ? (abdp->default_text_vma
974 + adata (abfd).exec_bytes_size)
975 : abdp->default_text_vma));
980 /* The .text section is being loaded at an unusual address. We
981 may need to pad it such that the .data section starts at a page
984 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
985 & (adata (abfd).page_size - 1));
987 text_pad = ((- obj_textsec (abfd)->vma)
988 & (adata (abfd).page_size - 1));
991 /* Find start of data. */
994 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->size;
995 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
999 /* Note that if page_size == zmagic_disk_block_size, then
1000 filepos == page_size, and this case is the same as the ztih
1002 text_end = obj_textsec (abfd)->size;
1003 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
1004 text_end += obj_textsec (abfd)->filepos;
1006 obj_textsec (abfd)->size += text_pad;
1007 text_end += text_pad;
1010 if (!obj_datasec (abfd)->user_set_vma)
1013 vma = obj_textsec (abfd)->vma + obj_textsec (abfd)->size;
1014 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1016 if (abdp && abdp->zmagic_mapped_contiguous)
1018 asection * text = obj_textsec (abfd);
1019 asection * data = obj_datasec (abfd);
1021 text_pad = data->vma - (text->vma + text->size);
1022 /* Only pad the text section if the data
1023 section is going to be placed after it. */
1025 text->size += text_pad;
1027 obj_datasec (abfd)->filepos = (obj_textsec (abfd)->filepos
1028 + obj_textsec (abfd)->size);
1030 /* Fix up exec header while we're at it. */
1031 execp->a_text = obj_textsec (abfd)->size;
1032 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1033 execp->a_text += adata (abfd).exec_bytes_size;
1034 if (obj_aout_subformat (abfd) == q_magic_format)
1035 N_SET_MAGIC (*execp, QMAGIC);
1037 N_SET_MAGIC (*execp, ZMAGIC);
1039 /* Spec says data section should be rounded up to page boundary. */
1040 obj_datasec (abfd)->size
1041 = align_power (obj_datasec (abfd)->size,
1042 obj_bsssec (abfd)->alignment_power);
1043 execp->a_data = BFD_ALIGN (obj_datasec (abfd)->size,
1044 adata (abfd).page_size);
1045 data_pad = execp->a_data - obj_datasec (abfd)->size;
1048 if (!obj_bsssec (abfd)->user_set_vma)
1049 obj_bsssec (abfd)->vma = (obj_datasec (abfd)->vma
1050 + obj_datasec (abfd)->size);
1051 /* If the BSS immediately follows the data section and extra space
1052 in the page is left after the data section, fudge data
1053 in the header so that the bss section looks smaller by that
1054 amount. We'll start the bss section there, and lie to the OS.
1055 (Note that a linker script, as well as the above assignment,
1056 could have explicitly set the BSS vma to immediately follow
1057 the data section.) */
1058 if (align_power (obj_bsssec (abfd)->vma, obj_bsssec (abfd)->alignment_power)
1059 == obj_datasec (abfd)->vma + obj_datasec (abfd)->size)
1060 execp->a_bss = (data_pad > obj_bsssec (abfd)->size
1061 ? 0 : obj_bsssec (abfd)->size - data_pad);
1063 execp->a_bss = obj_bsssec (abfd)->size;
1067 adjust_n_magic (bfd *abfd, struct internal_exec *execp)
1069 file_ptr pos = adata (abfd).exec_bytes_size;
1074 obj_textsec (abfd)->filepos = pos;
1075 if (!obj_textsec (abfd)->user_set_vma)
1076 obj_textsec (abfd)->vma = vma;
1078 vma = obj_textsec (abfd)->vma;
1079 pos += obj_textsec (abfd)->size;
1080 vma += obj_textsec (abfd)->size;
1083 obj_datasec (abfd)->filepos = pos;
1084 if (!obj_datasec (abfd)->user_set_vma)
1085 obj_datasec (abfd)->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
1086 vma = obj_datasec (abfd)->vma;
1088 /* Since BSS follows data immediately, see if it needs alignment. */
1089 vma += obj_datasec (abfd)->size;
1090 pad = align_power (vma, obj_bsssec (abfd)->alignment_power) - vma;
1091 obj_datasec (abfd)->size += pad;
1092 pos += obj_datasec (abfd)->size;
1095 if (!obj_bsssec (abfd)->user_set_vma)
1096 obj_bsssec (abfd)->vma = vma;
1098 vma = obj_bsssec (abfd)->vma;
1100 /* Fix up exec header. */
1101 execp->a_text = obj_textsec (abfd)->size;
1102 execp->a_data = obj_datasec (abfd)->size;
1103 execp->a_bss = obj_bsssec (abfd)->size;
1104 N_SET_MAGIC (*execp, NMAGIC);
1108 NAME (aout, adjust_sizes_and_vmas) (bfd *abfd,
1109 bfd_size_type *text_size,
1110 file_ptr *text_end ATTRIBUTE_UNUSED)
1112 struct internal_exec *execp = exec_hdr (abfd);
1114 if (! NAME (aout, make_sections) (abfd))
1117 if (adata (abfd).magic != undecided_magic)
1120 obj_textsec (abfd)->size =
1121 align_power (obj_textsec (abfd)->size,
1122 obj_textsec (abfd)->alignment_power);
1124 *text_size = obj_textsec (abfd)->size;
1125 /* Rule (heuristic) for when to pad to a new page. Note that there
1126 are (at least) two ways demand-paged (ZMAGIC) files have been
1127 handled. Most Berkeley-based systems start the text segment at
1128 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1129 segment right after the exec header; the latter is counted in the
1130 text segment size, and is paged in by the kernel with the rest of
1133 /* This perhaps isn't the right way to do this, but made it simpler for me
1134 to understand enough to implement it. Better would probably be to go
1135 right from BFD flags to alignment/positioning characteristics. But the
1136 old code was sloppy enough about handling the flags, and had enough
1137 other magic, that it was a little hard for me to understand. I think
1138 I understand it better now, but I haven't time to do the cleanup this
1141 if (abfd->flags & D_PAGED)
1142 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1143 adata (abfd).magic = z_magic;
1144 else if (abfd->flags & WP_TEXT)
1145 adata (abfd).magic = n_magic;
1147 adata (abfd).magic = o_magic;
1149 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1151 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1153 switch (adata (abfd).magic)
1155 case n_magic: str = "NMAGIC"; break;
1156 case o_magic: str = "OMAGIC"; break;
1157 case z_magic: str = "ZMAGIC"; break;
1162 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1163 obj_textsec (abfd)->alignment_power,
1164 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1165 obj_datasec (abfd)->alignment_power,
1166 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size,
1167 obj_bsssec (abfd)->alignment_power);
1171 switch (adata (abfd).magic)
1174 adjust_o_magic (abfd, execp);
1177 adjust_z_magic (abfd, execp);
1180 adjust_n_magic (abfd, execp);
1186 #ifdef BFD_AOUT_DEBUG
1187 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1188 obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
1189 obj_textsec (abfd)->filepos,
1190 obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
1191 obj_datasec (abfd)->filepos,
1192 obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size);
1200 aout_@var{size}_new_section_hook
1203 bfd_boolean aout_@var{size}_new_section_hook,
1208 Called by the BFD in response to a @code{bfd_make_section}
1212 NAME (aout, new_section_hook) (bfd *abfd, asection *newsect)
1214 /* Align to double at least. */
1215 newsect->alignment_power = bfd_get_arch_info (abfd)->section_align_power;
1217 if (bfd_get_format (abfd) == bfd_object)
1219 if (obj_textsec (abfd) == NULL && !strcmp (newsect->name, ".text"))
1221 obj_textsec (abfd)= newsect;
1222 newsect->target_index = N_TEXT;
1224 else if (obj_datasec (abfd) == NULL && !strcmp (newsect->name, ".data"))
1226 obj_datasec (abfd) = newsect;
1227 newsect->target_index = N_DATA;
1229 else if (obj_bsssec (abfd) == NULL && !strcmp (newsect->name, ".bss"))
1231 obj_bsssec (abfd) = newsect;
1232 newsect->target_index = N_BSS;
1236 /* We allow more than three sections internally. */
1237 return _bfd_generic_new_section_hook (abfd, newsect);
1241 NAME (aout, set_section_contents) (bfd *abfd,
1243 const void * location,
1245 bfd_size_type count)
1248 bfd_size_type text_size;
1250 if (! abfd->output_has_begun)
1252 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1256 if (section == obj_bsssec (abfd))
1258 bfd_set_error (bfd_error_no_contents);
1262 if (section != obj_textsec (abfd)
1263 && section != obj_datasec (abfd))
1265 if (aout_section_merge_with_text_p (abfd, section))
1266 section->filepos = obj_textsec (abfd)->filepos +
1267 (section->vma - obj_textsec (abfd)->vma);
1270 (*_bfd_error_handler)
1271 (_("%s: can not represent section `%s' in a.out object file format"),
1272 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1273 bfd_set_error (bfd_error_nonrepresentable_section);
1280 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1281 || bfd_bwrite (location, count, abfd) != count)
1288 /* Read the external symbols from an a.out file. */
1291 aout_get_external_symbols (bfd *abfd)
1293 if (obj_aout_external_syms (abfd) == NULL)
1295 bfd_size_type count;
1296 struct external_nlist *syms;
1298 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1300 return TRUE; /* Nothing to do. */
1303 if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
1304 exec_hdr (abfd)->a_syms,
1305 &obj_aout_sym_window (abfd), TRUE))
1307 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1309 /* We allocate using malloc to make the values easy to free
1310 later on. If we put them on the objalloc it might not be
1311 possible to free them. */
1312 syms = bfd_malloc (count * EXTERNAL_NLIST_SIZE);
1318 amt = exec_hdr (abfd)->a_syms;
1319 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1320 || bfd_bread (syms, amt, abfd) != amt)
1328 obj_aout_external_syms (abfd) = syms;
1329 obj_aout_external_sym_count (abfd) = count;
1332 if (obj_aout_external_strings (abfd) == NULL
1333 && exec_hdr (abfd)->a_syms != 0)
1335 unsigned char string_chars[BYTES_IN_WORD];
1336 bfd_size_type stringsize;
1338 bfd_size_type amt = BYTES_IN_WORD;
1340 /* Get the size of the strings. */
1341 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1342 || bfd_bread ((void *) string_chars, amt, abfd) != amt)
1344 stringsize = GET_WORD (abfd, string_chars);
1347 if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1348 &obj_aout_string_window (abfd), TRUE))
1350 strings = (char *) obj_aout_string_window (abfd).data;
1352 strings = bfd_malloc (stringsize + 1);
1353 if (strings == NULL)
1356 /* Skip space for the string count in the buffer for convenience
1357 when using indexes. */
1358 amt = stringsize - BYTES_IN_WORD;
1359 if (bfd_bread (strings + BYTES_IN_WORD, amt, abfd) != amt)
1366 /* Ensure that a zero index yields an empty string. */
1369 strings[stringsize - 1] = 0;
1371 obj_aout_external_strings (abfd) = strings;
1372 obj_aout_external_string_size (abfd) = stringsize;
1378 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1379 and symbol->value fields of CACHE_PTR will be set from the a.out
1380 nlist structure. This function is responsible for setting
1381 symbol->flags and symbol->section, and adjusting symbol->value. */
1384 translate_from_native_sym_flags (bfd *abfd, aout_symbol_type *cache_ptr)
1388 if ((cache_ptr->type & N_STAB) != 0
1389 || cache_ptr->type == N_FN)
1393 /* This is a debugging symbol. */
1394 cache_ptr->symbol.flags = BSF_DEBUGGING;
1396 /* Work out the symbol section. */
1397 switch (cache_ptr->type & N_TYPE)
1401 sec = obj_textsec (abfd);
1404 sec = obj_datasec (abfd);
1407 sec = obj_bsssec (abfd);
1411 sec = bfd_abs_section_ptr;
1415 cache_ptr->symbol.section = sec;
1416 cache_ptr->symbol.value -= sec->vma;
1421 /* Get the default visibility. This does not apply to all types, so
1422 we just hold it in a local variable to use if wanted. */
1423 if ((cache_ptr->type & N_EXT) == 0)
1424 visible = BSF_LOCAL;
1426 visible = BSF_GLOBAL;
1428 switch (cache_ptr->type)
1431 case N_ABS: case N_ABS | N_EXT:
1432 cache_ptr->symbol.section = bfd_abs_section_ptr;
1433 cache_ptr->symbol.flags = visible;
1436 case N_UNDF | N_EXT:
1437 if (cache_ptr->symbol.value != 0)
1439 /* This is a common symbol. */
1440 cache_ptr->symbol.flags = BSF_GLOBAL;
1441 cache_ptr->symbol.section = bfd_com_section_ptr;
1445 cache_ptr->symbol.flags = 0;
1446 cache_ptr->symbol.section = bfd_und_section_ptr;
1450 case N_TEXT: case N_TEXT | N_EXT:
1451 cache_ptr->symbol.section = obj_textsec (abfd);
1452 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1453 cache_ptr->symbol.flags = visible;
1456 /* N_SETV symbols used to represent set vectors placed in the
1457 data section. They are no longer generated. Theoretically,
1458 it was possible to extract the entries and combine them with
1459 new ones, although I don't know if that was ever actually
1460 done. Unless that feature is restored, treat them as data
1462 case N_SETV: case N_SETV | N_EXT:
1463 case N_DATA: case N_DATA | N_EXT:
1464 cache_ptr->symbol.section = obj_datasec (abfd);
1465 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1466 cache_ptr->symbol.flags = visible;
1469 case N_BSS: case N_BSS | N_EXT:
1470 cache_ptr->symbol.section = obj_bsssec (abfd);
1471 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1472 cache_ptr->symbol.flags = visible;
1475 case N_SETA: case N_SETA | N_EXT:
1476 case N_SETT: case N_SETT | N_EXT:
1477 case N_SETD: case N_SETD | N_EXT:
1478 case N_SETB: case N_SETB | N_EXT:
1480 /* This code is no longer needed. It used to be used to make
1481 the linker handle set symbols, but they are now handled in
1482 the add_symbols routine instead. */
1483 switch (cache_ptr->type & N_TYPE)
1486 cache_ptr->symbol.section = bfd_abs_section_ptr;
1489 cache_ptr->symbol.section = obj_textsec (abfd);
1492 cache_ptr->symbol.section = obj_datasec (abfd);
1495 cache_ptr->symbol.section = obj_bsssec (abfd);
1499 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1504 /* This symbol is the text of a warning message. The next
1505 symbol is the symbol to associate the warning with. If a
1506 reference is made to that symbol, a warning is issued. */
1507 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1508 cache_ptr->symbol.section = bfd_abs_section_ptr;
1511 case N_INDR: case N_INDR | N_EXT:
1512 /* An indirect symbol. This consists of two symbols in a row.
1513 The first symbol is the name of the indirection. The second
1514 symbol is the name of the target. A reference to the first
1515 symbol becomes a reference to the second. */
1516 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1517 cache_ptr->symbol.section = bfd_ind_section_ptr;
1521 cache_ptr->symbol.section = bfd_und_section_ptr;
1522 cache_ptr->symbol.flags = BSF_WEAK;
1526 cache_ptr->symbol.section = bfd_abs_section_ptr;
1527 cache_ptr->symbol.flags = BSF_WEAK;
1531 cache_ptr->symbol.section = obj_textsec (abfd);
1532 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1533 cache_ptr->symbol.flags = BSF_WEAK;
1537 cache_ptr->symbol.section = obj_datasec (abfd);
1538 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1539 cache_ptr->symbol.flags = BSF_WEAK;
1543 cache_ptr->symbol.section = obj_bsssec (abfd);
1544 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1545 cache_ptr->symbol.flags = BSF_WEAK;
1552 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1555 translate_to_native_sym_flags (bfd *abfd,
1557 struct external_nlist *sym_pointer)
1559 bfd_vma value = cache_ptr->value;
1563 /* Mask out any existing type bits in case copying from one section
1565 sym_pointer->e_type[0] &= ~N_TYPE;
1567 sec = bfd_get_section (cache_ptr);
1572 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1574 (*_bfd_error_handler)
1575 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1576 bfd_get_filename (abfd),
1577 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1578 bfd_set_error (bfd_error_nonrepresentable_section);
1582 if (sec->output_section != NULL)
1584 off = sec->output_offset;
1585 sec = sec->output_section;
1588 if (bfd_is_abs_section (sec))
1589 sym_pointer->e_type[0] |= N_ABS;
1590 else if (sec == obj_textsec (abfd))
1591 sym_pointer->e_type[0] |= N_TEXT;
1592 else if (sec == obj_datasec (abfd))
1593 sym_pointer->e_type[0] |= N_DATA;
1594 else if (sec == obj_bsssec (abfd))
1595 sym_pointer->e_type[0] |= N_BSS;
1596 else if (bfd_is_und_section (sec))
1597 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1598 else if (bfd_is_ind_section (sec))
1599 sym_pointer->e_type[0] = N_INDR;
1600 else if (bfd_is_com_section (sec))
1601 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1604 if (aout_section_merge_with_text_p (abfd, sec))
1605 sym_pointer->e_type[0] |= N_TEXT;
1608 (*_bfd_error_handler)
1609 (_("%s: can not represent section `%s' in a.out object file format"),
1610 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1611 bfd_set_error (bfd_error_nonrepresentable_section);
1616 /* Turn the symbol from section relative to absolute again. */
1617 value += sec->vma + off;
1619 if ((cache_ptr->flags & BSF_WARNING) != 0)
1620 sym_pointer->e_type[0] = N_WARNING;
1622 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1623 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1624 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1625 sym_pointer->e_type[0] |= N_EXT;
1626 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1627 sym_pointer->e_type[0] &= ~N_EXT;
1629 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1631 int type = ((aout_symbol_type *) cache_ptr)->type;
1635 case N_ABS: type = N_SETA; break;
1636 case N_TEXT: type = N_SETT; break;
1637 case N_DATA: type = N_SETD; break;
1638 case N_BSS: type = N_SETB; break;
1640 sym_pointer->e_type[0] = type;
1643 if ((cache_ptr->flags & BSF_WEAK) != 0)
1647 switch (sym_pointer->e_type[0] & N_TYPE)
1650 case N_ABS: type = N_WEAKA; break;
1651 case N_TEXT: type = N_WEAKT; break;
1652 case N_DATA: type = N_WEAKD; break;
1653 case N_BSS: type = N_WEAKB; break;
1654 case N_UNDF: type = N_WEAKU; break;
1656 sym_pointer->e_type[0] = type;
1659 PUT_WORD (abfd, value, sym_pointer->e_value);
1664 /* Native-level interface to symbols. */
1667 NAME (aout, make_empty_symbol) (bfd *abfd)
1669 bfd_size_type amt = sizeof (aout_symbol_type);
1671 aout_symbol_type *new_symbol = (aout_symbol_type *) bfd_zalloc (abfd, amt);
1674 new_symbol->symbol.the_bfd = abfd;
1676 return &new_symbol->symbol;
1679 /* Translate a set of internal symbols into external symbols. */
1682 NAME (aout, translate_symbol_table) (bfd *abfd,
1683 aout_symbol_type *in,
1684 struct external_nlist *ext,
1685 bfd_size_type count,
1687 bfd_size_type strsize,
1688 bfd_boolean dynamic)
1690 struct external_nlist *ext_end;
1692 ext_end = ext + count;
1693 for (; ext < ext_end; ext++, in++)
1697 x = GET_WORD (abfd, ext->e_strx);
1698 in->symbol.the_bfd = abfd;
1700 /* For the normal symbols, the zero index points at the number
1701 of bytes in the string table but is to be interpreted as the
1702 null string. For the dynamic symbols, the number of bytes in
1703 the string table is stored in the __DYNAMIC structure and the
1704 zero index points at an actual string. */
1705 if (x == 0 && ! dynamic)
1706 in->symbol.name = "";
1707 else if (x < strsize)
1708 in->symbol.name = str + x;
1712 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1713 in->desc = H_GET_16 (abfd, ext->e_desc);
1714 in->other = H_GET_8 (abfd, ext->e_other);
1715 in->type = H_GET_8 (abfd, ext->e_type);
1716 in->symbol.udata.p = NULL;
1718 if (! translate_from_native_sym_flags (abfd, in))
1722 in->symbol.flags |= BSF_DYNAMIC;
1728 /* We read the symbols into a buffer, which is discarded when this
1729 function exits. We read the strings into a buffer large enough to
1730 hold them all plus all the cached symbol entries. */
1733 NAME (aout, slurp_symbol_table) (bfd *abfd)
1735 struct external_nlist *old_external_syms;
1736 aout_symbol_type *cached;
1737 bfd_size_type cached_size;
1739 /* If there's no work to be done, don't do any. */
1740 if (obj_aout_symbols (abfd) != NULL)
1743 old_external_syms = obj_aout_external_syms (abfd);
1745 if (! aout_get_external_symbols (abfd))
1748 cached_size = obj_aout_external_sym_count (abfd);
1749 if (cached_size == 0)
1750 return TRUE; /* Nothing to do. */
1752 cached_size *= sizeof (aout_symbol_type);
1753 cached = bfd_zmalloc (cached_size);
1757 /* Convert from external symbol information to internal. */
1758 if (! (NAME (aout, translate_symbol_table)
1760 obj_aout_external_syms (abfd),
1761 obj_aout_external_sym_count (abfd),
1762 obj_aout_external_strings (abfd),
1763 obj_aout_external_string_size (abfd),
1770 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1772 obj_aout_symbols (abfd) = cached;
1774 /* It is very likely that anybody who calls this function will not
1775 want the external symbol information, so if it was allocated
1776 because of our call to aout_get_external_symbols, we free it up
1777 right away to save space. */
1778 if (old_external_syms == NULL
1779 && obj_aout_external_syms (abfd) != NULL)
1782 bfd_free_window (&obj_aout_sym_window (abfd));
1784 free (obj_aout_external_syms (abfd));
1786 obj_aout_external_syms (abfd) = NULL;
1792 /* We use a hash table when writing out symbols so that we only write
1793 out a particular string once. This helps particularly when the
1794 linker writes out stabs debugging entries, because each different
1795 contributing object file tends to have many duplicate stabs
1798 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1799 if BFD_TRADITIONAL_FORMAT is set. */
1801 /* Get the index of a string in a strtab, adding it if it is not
1804 static inline bfd_size_type
1805 add_to_stringtab (bfd *abfd,
1806 struct bfd_strtab_hash *tab,
1811 bfd_size_type index;
1813 /* An index of 0 always means the empty string. */
1814 if (str == 0 || *str == '\0')
1817 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1818 doesn't understand a hashed string table. */
1820 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1823 index = _bfd_stringtab_add (tab, str, hash, copy);
1825 if (index != (bfd_size_type) -1)
1826 /* Add BYTES_IN_WORD to the return value to account for the
1827 space taken up by the string table size. */
1828 index += BYTES_IN_WORD;
1833 /* Write out a strtab. ABFD is already at the right location in the
1837 emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
1839 bfd_byte buffer[BYTES_IN_WORD];
1840 bfd_size_type amt = BYTES_IN_WORD;
1842 /* The string table starts with the size. */
1843 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1844 if (bfd_bwrite ((void *) buffer, amt, abfd) != amt)
1847 return _bfd_stringtab_emit (abfd, tab);
1851 NAME (aout, write_syms) (bfd *abfd)
1853 unsigned int count ;
1854 asymbol **generic = bfd_get_outsymbols (abfd);
1855 struct bfd_strtab_hash *strtab;
1857 strtab = _bfd_stringtab_init ();
1861 for (count = 0; count < bfd_get_symcount (abfd); count++)
1863 asymbol *g = generic[count];
1865 struct external_nlist nsp;
1868 indx = add_to_stringtab (abfd, strtab, g->name, FALSE);
1869 if (indx == (bfd_size_type) -1)
1871 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1873 if (bfd_asymbol_flavour (g) == abfd->xvec->flavour)
1875 H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
1876 H_PUT_8 (abfd, aout_symbol (g)->other, nsp.e_other);
1877 H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
1881 H_PUT_16 (abfd, 0, nsp.e_desc);
1882 H_PUT_8 (abfd, 0, nsp.e_other);
1883 H_PUT_8 (abfd, 0, nsp.e_type);
1886 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1889 amt = EXTERNAL_NLIST_SIZE;
1890 if (bfd_bwrite ((void *) &nsp, amt, abfd) != amt)
1893 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1894 here, at the end. */
1898 if (! emit_stringtab (abfd, strtab))
1901 _bfd_stringtab_free (strtab);
1906 _bfd_stringtab_free (strtab);
1911 NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
1913 unsigned int counter = 0;
1914 aout_symbol_type *symbase;
1916 if (!NAME (aout, slurp_symbol_table) (abfd))
1919 for (symbase = obj_aout_symbols (abfd);
1920 counter++ < bfd_get_symcount (abfd);
1922 *(location++) = (asymbol *) (symbase++);
1924 return bfd_get_symcount (abfd);
1927 /* Standard reloc stuff. */
1928 /* Output standard relocation information to a file in target byte order. */
1930 extern void NAME (aout, swap_std_reloc_out)
1931 (bfd *, arelent *, struct reloc_std_external *);
1934 NAME (aout, swap_std_reloc_out) (bfd *abfd,
1936 struct reloc_std_external *natptr)
1939 asymbol *sym = *(g->sym_ptr_ptr);
1941 unsigned int r_length;
1943 int r_baserel, r_jmptable, r_relative;
1944 asection *output_section = sym->section->output_section;
1946 PUT_WORD (abfd, g->address, natptr->r_address);
1948 r_length = g->howto->size ; /* Size as a power of two. */
1949 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1950 /* XXX This relies on relocs coming from a.out files. */
1951 r_baserel = (g->howto->type & 8) != 0;
1952 r_jmptable = (g->howto->type & 16) != 0;
1953 r_relative = (g->howto->type & 32) != 0;
1955 /* Name was clobbered by aout_write_syms to be symbol index. */
1957 /* If this relocation is relative to a symbol then set the
1958 r_index to the symbols index, and the r_extern bit.
1960 Absolute symbols can come in in two ways, either as an offset
1961 from the abs section, or as a symbol which has an abs value.
1962 check for that here. */
1964 if (bfd_is_com_section (output_section)
1965 || bfd_is_abs_section (output_section)
1966 || bfd_is_und_section (output_section)
1967 /* PR gas/3041 a.out relocs against weak symbols
1968 must be treated as if they were against externs. */
1969 || (sym->flags & BSF_WEAK))
1971 if (bfd_abs_section_ptr->symbol == sym)
1973 /* Whoops, looked like an abs symbol, but is
1974 really an offset from the abs section. */
1980 /* Fill in symbol. */
1982 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1987 /* Just an ordinary section. */
1989 r_index = output_section->target_index;
1992 /* Now the fun stuff. */
1993 if (bfd_header_big_endian (abfd))
1995 natptr->r_index[0] = r_index >> 16;
1996 natptr->r_index[1] = r_index >> 8;
1997 natptr->r_index[2] = r_index;
1998 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
1999 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
2000 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
2001 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
2002 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
2003 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
2007 natptr->r_index[2] = r_index >> 16;
2008 natptr->r_index[1] = r_index >> 8;
2009 natptr->r_index[0] = r_index;
2010 natptr->r_type[0] = ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
2011 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
2012 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
2013 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
2014 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
2015 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
2019 /* Extended stuff. */
2020 /* Output extended relocation information to a file in target byte order. */
2022 extern void NAME (aout, swap_ext_reloc_out)
2023 (bfd *, arelent *, struct reloc_ext_external *);
2026 NAME (aout, swap_ext_reloc_out) (bfd *abfd,
2028 struct reloc_ext_external *natptr)
2032 unsigned int r_type;
2034 asymbol *sym = *(g->sym_ptr_ptr);
2035 asection *output_section = sym->section->output_section;
2037 PUT_WORD (abfd, g->address, natptr->r_address);
2039 r_type = (unsigned int) g->howto->type;
2041 r_addend = g->addend;
2042 if ((sym->flags & BSF_SECTION_SYM) != 0)
2043 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2045 /* If this relocation is relative to a symbol then set the
2046 r_index to the symbols index, and the r_extern bit.
2048 Absolute symbols can come in in two ways, either as an offset
2049 from the abs section, or as a symbol which has an abs value.
2050 check for that here. */
2051 if (bfd_is_abs_section (bfd_get_section (sym)))
2056 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2058 if (bfd_is_und_section (bfd_get_section (sym))
2059 || (sym->flags & BSF_GLOBAL) != 0)
2063 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2067 /* Just an ordinary section. */
2069 r_index = output_section->target_index;
2072 /* Now the fun stuff. */
2073 if (bfd_header_big_endian (abfd))
2075 natptr->r_index[0] = r_index >> 16;
2076 natptr->r_index[1] = r_index >> 8;
2077 natptr->r_index[2] = r_index;
2078 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
2079 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2083 natptr->r_index[2] = r_index >> 16;
2084 natptr->r_index[1] = r_index >> 8;
2085 natptr->r_index[0] = r_index;
2086 natptr->r_type[0] = ((r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
2087 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE));
2090 PUT_WORD (abfd, r_addend, natptr->r_addend);
2093 /* BFD deals internally with all things based from the section they're
2094 in. so, something in 10 bytes into a text section with a base of
2095 50 would have a symbol (.text+10) and know .text vma was 50.
2097 Aout keeps all it's symbols based from zero, so the symbol would
2098 contain 60. This macro subs the base of each section from the value
2099 to give the true offset from the section. */
2101 #define MOVE_ADDRESS(ad) \
2104 /* Undefined symbol. */ \
2105 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2106 cache_ptr->addend = ad; \
2110 /* Defined, section relative. Replace symbol with pointer to \
2111 symbol which points to section. */ \
2115 case N_TEXT | N_EXT: \
2116 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2117 cache_ptr->addend = ad - su->textsec->vma; \
2120 case N_DATA | N_EXT: \
2121 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2122 cache_ptr->addend = ad - su->datasec->vma; \
2125 case N_BSS | N_EXT: \
2126 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2127 cache_ptr->addend = ad - su->bsssec->vma; \
2131 case N_ABS | N_EXT: \
2132 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2133 cache_ptr->addend = ad; \
2139 NAME (aout, swap_ext_reloc_in) (bfd *abfd,
2140 struct reloc_ext_external *bytes,
2143 bfd_size_type symcount)
2145 unsigned int r_index;
2147 unsigned int r_type;
2148 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2150 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2152 /* Now the fun stuff. */
2153 if (bfd_header_big_endian (abfd))
2155 r_index = (((unsigned int) bytes->r_index[0] << 16)
2156 | ((unsigned int) bytes->r_index[1] << 8)
2157 | bytes->r_index[2]);
2158 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2159 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2160 >> RELOC_EXT_BITS_TYPE_SH_BIG);
2164 r_index = (((unsigned int) bytes->r_index[2] << 16)
2165 | ((unsigned int) bytes->r_index[1] << 8)
2166 | bytes->r_index[0]);
2167 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2168 r_type = ((bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2169 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
2172 if (r_type < TABLE_SIZE (howto_table_ext))
2173 cache_ptr->howto = howto_table_ext + r_type;
2175 cache_ptr->howto = NULL;
2177 /* Base relative relocs are always against the symbol table,
2178 regardless of the setting of r_extern. r_extern just reflects
2179 whether the symbol the reloc is against is local or global. */
2180 if (r_type == (unsigned int) RELOC_BASE10
2181 || r_type == (unsigned int) RELOC_BASE13
2182 || r_type == (unsigned int) RELOC_BASE22)
2185 if (r_extern && r_index > symcount)
2187 /* We could arrange to return an error, but it might be useful
2188 to see the file even if it is bad. */
2193 MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
2197 NAME (aout, swap_std_reloc_in) (bfd *abfd,
2198 struct reloc_std_external *bytes,
2201 bfd_size_type symcount)
2203 unsigned int r_index;
2205 unsigned int r_length;
2207 int r_baserel, r_jmptable, r_relative;
2208 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2209 unsigned int howto_idx;
2211 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
2213 /* Now the fun stuff. */
2214 if (bfd_header_big_endian (abfd))
2216 r_index = (((unsigned int) bytes->r_index[0] << 16)
2217 | ((unsigned int) bytes->r_index[1] << 8)
2218 | bytes->r_index[2]);
2219 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2220 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2221 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2222 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2223 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2224 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2225 >> RELOC_STD_BITS_LENGTH_SH_BIG);
2229 r_index = (((unsigned int) bytes->r_index[2] << 16)
2230 | ((unsigned int) bytes->r_index[1] << 8)
2231 | bytes->r_index[0]);
2232 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2233 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2234 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2235 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2236 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2237 r_length = ((bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2238 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
2241 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
2242 + 16 * r_jmptable + 32 * r_relative);
2243 if (howto_idx < TABLE_SIZE (howto_table_std))
2245 cache_ptr->howto = howto_table_std + howto_idx;
2246 if (cache_ptr->howto->type == (unsigned int) -1)
2247 cache_ptr->howto = NULL;
2250 cache_ptr->howto = NULL;
2252 /* Base relative relocs are always against the symbol table,
2253 regardless of the setting of r_extern. r_extern just reflects
2254 whether the symbol the reloc is against is local or global. */
2258 if (r_extern && r_index > symcount)
2260 /* We could arrange to return an error, but it might be useful
2261 to see the file even if it is bad. */
2269 /* Read and swap the relocs for a section. */
2272 NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
2274 bfd_size_type count;
2275 bfd_size_type reloc_size;
2277 arelent *reloc_cache;
2279 unsigned int counter = 0;
2283 if (asect->relocation)
2286 if (asect->flags & SEC_CONSTRUCTOR)
2289 if (asect == obj_datasec (abfd))
2290 reloc_size = exec_hdr (abfd)->a_drsize;
2291 else if (asect == obj_textsec (abfd))
2292 reloc_size = exec_hdr (abfd)->a_trsize;
2293 else if (asect == obj_bsssec (abfd))
2297 bfd_set_error (bfd_error_invalid_operation);
2301 if (reloc_size == 0)
2302 return TRUE; /* Nothing to be done. */
2304 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2307 each_size = obj_reloc_entry_size (abfd);
2309 count = reloc_size / each_size;
2311 return TRUE; /* Nothing to be done. */
2313 amt = count * sizeof (arelent);
2314 reloc_cache = bfd_zmalloc (amt);
2315 if (reloc_cache == NULL)
2318 relocs = bfd_malloc (reloc_size);
2325 if (bfd_bread (relocs, reloc_size, abfd) != reloc_size)
2332 cache_ptr = reloc_cache;
2333 if (each_size == RELOC_EXT_SIZE)
2335 struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
2337 for (; counter < count; counter++, rptr++, cache_ptr++)
2338 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2339 (bfd_size_type) bfd_get_symcount (abfd));
2343 struct reloc_std_external *rptr = (struct reloc_std_external *) relocs;
2345 for (; counter < count; counter++, rptr++, cache_ptr++)
2346 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2347 (bfd_size_type) bfd_get_symcount (abfd));
2352 asect->relocation = reloc_cache;
2353 asect->reloc_count = cache_ptr - reloc_cache;
2358 /* Write out a relocation section into an object file. */
2361 NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
2364 unsigned char *native, *natptr;
2367 unsigned int count = section->reloc_count;
2368 bfd_size_type natsize;
2370 if (count == 0 || section->orelocation == NULL)
2373 each_size = obj_reloc_entry_size (abfd);
2374 natsize = (bfd_size_type) each_size * count;
2375 native = bfd_zalloc (abfd, natsize);
2379 generic = section->orelocation;
2381 if (each_size == RELOC_EXT_SIZE)
2383 for (natptr = native;
2385 --count, natptr += each_size, ++generic)
2386 MY_swap_ext_reloc_out (abfd, *generic,
2387 (struct reloc_ext_external *) natptr);
2391 for (natptr = native;
2393 --count, natptr += each_size, ++generic)
2394 MY_swap_std_reloc_out (abfd, *generic,
2395 (struct reloc_std_external *) natptr);
2398 if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
2400 bfd_release (abfd, native);
2403 bfd_release (abfd, native);
2408 /* This is stupid. This function should be a boolean predicate. */
2411 NAME (aout, canonicalize_reloc) (bfd *abfd,
2416 arelent *tblptr = section->relocation;
2419 if (section == obj_bsssec (abfd))
2425 if (!(tblptr || NAME (aout, slurp_reloc_table) (abfd, section, symbols)))
2428 if (section->flags & SEC_CONSTRUCTOR)
2430 arelent_chain *chain = section->constructor_chain;
2431 for (count = 0; count < section->reloc_count; count ++)
2433 *relptr ++ = &chain->relent;
2434 chain = chain->next;
2439 tblptr = section->relocation;
2441 for (count = 0; count++ < section->reloc_count; )
2443 *relptr++ = tblptr++;
2448 return section->reloc_count;
2452 NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
2454 if (bfd_get_format (abfd) != bfd_object)
2456 bfd_set_error (bfd_error_invalid_operation);
2460 if (asect->flags & SEC_CONSTRUCTOR)
2461 return sizeof (arelent *) * (asect->reloc_count + 1);
2463 if (asect == obj_datasec (abfd))
2464 return sizeof (arelent *)
2465 * ((exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd))
2468 if (asect == obj_textsec (abfd))
2469 return sizeof (arelent *)
2470 * ((exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd))
2473 if (asect == obj_bsssec (abfd))
2474 return sizeof (arelent *);
2476 if (asect == obj_bsssec (abfd))
2479 bfd_set_error (bfd_error_invalid_operation);
2484 NAME (aout, get_symtab_upper_bound) (bfd *abfd)
2486 if (!NAME (aout, slurp_symbol_table) (abfd))
2489 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2493 NAME (aout, get_lineno) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2494 asymbol *ignore_symbol ATTRIBUTE_UNUSED)
2500 NAME (aout, get_symbol_info) (bfd *ignore_abfd ATTRIBUTE_UNUSED,
2504 bfd_symbol_info (symbol, ret);
2506 if (ret->type == '?')
2508 int type_code = aout_symbol (symbol)->type & 0xff;
2509 const char *stab_name = bfd_get_stab_name (type_code);
2510 static char buf[10];
2512 if (stab_name == NULL)
2514 sprintf (buf, "(%d)", type_code);
2518 ret->stab_type = type_code;
2519 ret->stab_other = (unsigned) (aout_symbol (symbol)->other & 0xff);
2520 ret->stab_desc = (unsigned) (aout_symbol (symbol)->desc & 0xffff);
2521 ret->stab_name = stab_name;
2526 NAME (aout, print_symbol) (bfd *abfd,
2529 bfd_print_symbol_type how)
2531 FILE *file = (FILE *)afile;
2535 case bfd_print_symbol_name:
2537 fprintf (file,"%s", symbol->name);
2539 case bfd_print_symbol_more:
2540 fprintf (file,"%4x %2x %2x",
2541 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2542 (unsigned) (aout_symbol (symbol)->other & 0xff),
2543 (unsigned) (aout_symbol (symbol)->type));
2545 case bfd_print_symbol_all:
2547 const char *section_name = symbol->section->name;
2549 bfd_print_symbol_vandf (abfd, (void *)file, symbol);
2551 fprintf (file," %-5s %04x %02x %02x",
2553 (unsigned) (aout_symbol (symbol)->desc & 0xffff),
2554 (unsigned) (aout_symbol (symbol)->other & 0xff),
2555 (unsigned) (aout_symbol (symbol)->type & 0xff));
2557 fprintf (file," %s", symbol->name);
2563 /* If we don't have to allocate more than 1MB to hold the generic
2564 symbols, we use the generic minisymbol methord: it's faster, since
2565 it only translates the symbols once, not multiple times. */
2566 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2568 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2569 symbols. The minisymbol_to_symbol function translates these into
2570 BFD asymbol structures. */
2573 NAME (aout, read_minisymbols) (bfd *abfd,
2574 bfd_boolean dynamic,
2576 unsigned int *sizep)
2579 /* We could handle the dynamic symbols here as well, but it's
2580 easier to hand them off. */
2581 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2583 if (! aout_get_external_symbols (abfd))
2586 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2587 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2589 *minisymsp = (void *) obj_aout_external_syms (abfd);
2591 /* By passing the external symbols back from this routine, we are
2592 giving up control over the memory block. Clear
2593 obj_aout_external_syms, so that we do not try to free it
2595 obj_aout_external_syms (abfd) = NULL;
2597 *sizep = EXTERNAL_NLIST_SIZE;
2598 return obj_aout_external_sym_count (abfd);
2601 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2602 unmodified a.out symbol. The SYM argument is a structure returned
2603 by bfd_make_empty_symbol, which we fill in here. */
2606 NAME (aout, minisymbol_to_symbol) (bfd *abfd,
2607 bfd_boolean dynamic,
2608 const void * minisym,
2612 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2613 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2615 memset (sym, 0, sizeof (aout_symbol_type));
2617 /* We call translate_symbol_table to translate a single symbol. */
2618 if (! (NAME (aout, translate_symbol_table)
2620 (aout_symbol_type *) sym,
2621 (struct external_nlist *) minisym,
2623 obj_aout_external_strings (abfd),
2624 obj_aout_external_string_size (abfd),
2631 /* Provided a BFD, a section and an offset into the section, calculate
2632 and return the name of the source file and the line nearest to the
2636 NAME (aout, find_nearest_line) (bfd *abfd,
2640 const char **filename_ptr,
2641 const char **functionname_ptr,
2642 unsigned int *line_ptr)
2644 /* Run down the file looking for the filename, function and linenumber. */
2646 const char *directory_name = NULL;
2647 const char *main_file_name = NULL;
2648 const char *current_file_name = NULL;
2649 const char *line_file_name = NULL; /* Value of current_file_name at line number. */
2650 const char *line_directory_name = NULL; /* Value of directory_name at line number. */
2651 bfd_vma low_line_vma = 0;
2652 bfd_vma low_func_vma = 0;
2654 bfd_size_type filelen, funclen;
2657 *filename_ptr = abfd->filename;
2658 *functionname_ptr = 0;
2661 if (symbols != NULL)
2663 for (p = symbols; *p; p++)
2665 aout_symbol_type *q = (aout_symbol_type *) (*p);
2670 /* If this looks like a file name symbol, and it comes after
2671 the line number we have found so far, but before the
2672 offset, then we have probably not found the right line
2674 if (q->symbol.value <= offset
2675 && ((q->symbol.value > low_line_vma
2676 && (line_file_name != NULL
2678 || (q->symbol.value > low_func_vma
2681 const char *symname;
2683 symname = q->symbol.name;
2684 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2686 if (q->symbol.value > low_line_vma)
2689 line_file_name = NULL;
2691 if (q->symbol.value > low_func_vma)
2698 /* If this symbol is less than the offset, but greater than
2699 the line number we have found so far, then we have not
2700 found the right line number. */
2701 if (q->symbol.value <= offset)
2703 if (q->symbol.value > low_line_vma)
2706 line_file_name = NULL;
2708 if (q->symbol.value > low_func_vma)
2712 main_file_name = current_file_name = q->symbol.name;
2713 /* Look ahead to next symbol to check if that too is an N_SO. */
2717 q = (aout_symbol_type *) (*p);
2718 if (q->type != (int)N_SO)
2721 /* Found a second N_SO First is directory; second is filename. */
2722 directory_name = current_file_name;
2723 main_file_name = current_file_name = q->symbol.name;
2724 if (obj_textsec (abfd) != section)
2728 current_file_name = q->symbol.name;
2735 /* We'll keep this if it resolves nearer than the one we have
2737 if (q->symbol.value >= low_line_vma
2738 && q->symbol.value <= offset)
2740 *line_ptr = q->desc;
2741 low_line_vma = q->symbol.value;
2742 line_file_name = current_file_name;
2743 line_directory_name = directory_name;
2748 /* We'll keep this if it is nearer than the one we have already. */
2749 if (q->symbol.value >= low_func_vma &&
2750 q->symbol.value <= offset)
2752 low_func_vma = q->symbol.value;
2753 func = (asymbol *)q;
2755 else if (q->symbol.value > offset)
2766 main_file_name = line_file_name;
2767 directory_name = line_directory_name;
2770 if (main_file_name == NULL
2771 || IS_ABSOLUTE_PATH (main_file_name)
2772 || directory_name == NULL)
2775 filelen = strlen (directory_name) + strlen (main_file_name);
2780 funclen = strlen (bfd_asymbol_name (func));
2782 if (adata (abfd).line_buf != NULL)
2783 free (adata (abfd).line_buf);
2785 if (filelen + funclen == 0)
2786 adata (abfd).line_buf = buf = NULL;
2789 buf = bfd_malloc (filelen + funclen + 3);
2790 adata (abfd).line_buf = buf;
2795 if (main_file_name != NULL)
2797 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2798 *filename_ptr = main_file_name;
2801 sprintf (buf, "%s%s", directory_name, main_file_name);
2802 *filename_ptr = buf;
2809 const char *function = func->name;
2812 /* The caller expects a symbol name. We actually have a
2813 function name, without the leading underscore. Put the
2814 underscore back in, so that the caller gets a symbol name. */
2815 if (bfd_get_symbol_leading_char (abfd) == '\0')
2816 strcpy (buf, function);
2819 buf[0] = bfd_get_symbol_leading_char (abfd);
2820 strcpy (buf + 1, function);
2822 /* Have to remove : stuff. */
2823 colon = strchr (buf, ':');
2826 *functionname_ptr = buf;
2833 NAME (aout, sizeof_headers) (bfd *abfd,
2834 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2836 return adata (abfd).exec_bytes_size;
2839 /* Free all information we have cached for this BFD. We can always
2840 read it again later if we need it. */
2843 NAME (aout, bfd_free_cached_info) (bfd *abfd)
2847 if (bfd_get_format (abfd) != bfd_object
2848 || abfd->tdata.aout_data == NULL)
2851 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2852 BFCI_FREE (obj_aout_symbols (abfd));
2854 obj_aout_external_syms (abfd) = 0;
2855 bfd_free_window (&obj_aout_sym_window (abfd));
2856 bfd_free_window (&obj_aout_string_window (abfd));
2857 obj_aout_external_strings (abfd) = 0;
2859 BFCI_FREE (obj_aout_external_syms (abfd));
2860 BFCI_FREE (obj_aout_external_strings (abfd));
2862 for (o = abfd->sections; o != NULL; o = o->next)
2863 BFCI_FREE (o->relocation);
2869 /* a.out link code. */
2871 /* Routine to create an entry in an a.out link hash table. */
2873 struct bfd_hash_entry *
2874 NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
2875 struct bfd_hash_table *table,
2878 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2880 /* Allocate the structure if it has not already been allocated by a
2883 ret = bfd_hash_allocate (table, sizeof (* ret));
2887 /* Call the allocation method of the superclass. */
2888 ret = ((struct aout_link_hash_entry *)
2889 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2893 /* Set local fields. */
2894 ret->written = FALSE;
2898 return (struct bfd_hash_entry *) ret;
2901 /* Initialize an a.out link hash table. */
2904 NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
2906 struct bfd_hash_entry *(*newfunc)
2907 (struct bfd_hash_entry *, struct bfd_hash_table *,
2909 unsigned int entsize)
2911 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
2914 /* Create an a.out link hash table. */
2916 struct bfd_link_hash_table *
2917 NAME (aout, link_hash_table_create) (bfd *abfd)
2919 struct aout_link_hash_table *ret;
2920 bfd_size_type amt = sizeof (* ret);
2922 ret = bfd_malloc (amt);
2926 if (!NAME (aout, link_hash_table_init) (ret, abfd,
2927 NAME (aout, link_hash_newfunc),
2928 sizeof (struct aout_link_hash_entry)))
2936 /* Add all symbols from an object file to the hash table. */
2939 aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
2941 bfd_boolean (*add_one_symbol)
2942 (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
2943 bfd_vma, const char *, bfd_boolean, bfd_boolean,
2944 struct bfd_link_hash_entry **);
2945 struct external_nlist *syms;
2946 bfd_size_type sym_count;
2949 struct aout_link_hash_entry **sym_hash;
2950 struct external_nlist *p;
2951 struct external_nlist *pend;
2954 syms = obj_aout_external_syms (abfd);
2955 sym_count = obj_aout_external_sym_count (abfd);
2956 strings = obj_aout_external_strings (abfd);
2957 if (info->keep_memory)
2962 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
2964 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
2965 (abfd, info, &syms, &sym_count, &strings)))
2970 return TRUE; /* Nothing to do. */
2972 /* We keep a list of the linker hash table entries that correspond
2973 to particular symbols. We could just look them up in the hash
2974 table, but keeping the list is more efficient. Perhaps this
2975 should be conditional on info->keep_memory. */
2976 amt = sym_count * sizeof (struct aout_link_hash_entry *);
2977 sym_hash = bfd_alloc (abfd, amt);
2978 if (sym_hash == NULL)
2980 obj_aout_sym_hashes (abfd) = sym_hash;
2982 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
2983 if (add_one_symbol == NULL)
2984 add_one_symbol = _bfd_generic_link_add_one_symbol;
2987 pend = p + sym_count;
2988 for (; p < pend; p++, sym_hash++)
2999 type = H_GET_8 (abfd, p->e_type);
3001 /* Ignore debugging symbols. */
3002 if ((type & N_STAB) != 0)
3005 name = strings + GET_WORD (abfd, p->e_strx);
3006 value = GET_WORD (abfd, p->e_value);
3023 /* Ignore symbols that are not externally visible. */
3026 /* Ignore local indirect symbol. */
3031 case N_UNDF | N_EXT:
3034 section = bfd_und_section_ptr;
3038 section = bfd_com_section_ptr;
3041 section = bfd_abs_section_ptr;
3043 case N_TEXT | N_EXT:
3044 section = obj_textsec (abfd);
3045 value -= bfd_get_section_vma (abfd, section);
3047 case N_DATA | N_EXT:
3048 case N_SETV | N_EXT:
3049 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3050 translate_from_native_sym_flags. */
3051 section = obj_datasec (abfd);
3052 value -= bfd_get_section_vma (abfd, section);
3055 section = obj_bsssec (abfd);
3056 value -= bfd_get_section_vma (abfd, section);
3058 case N_INDR | N_EXT:
3059 /* An indirect symbol. The next symbol is the symbol
3060 which this one really is. */
3061 BFD_ASSERT (p + 1 < pend);
3063 string = strings + GET_WORD (abfd, p->e_strx);
3064 section = bfd_ind_section_ptr;
3065 flags |= BSF_INDIRECT;
3067 case N_COMM | N_EXT:
3068 section = bfd_com_section_ptr;
3070 case N_SETA: case N_SETA | N_EXT:
3071 section = bfd_abs_section_ptr;
3072 flags |= BSF_CONSTRUCTOR;
3074 case N_SETT: case N_SETT | N_EXT:
3075 section = obj_textsec (abfd);
3076 flags |= BSF_CONSTRUCTOR;
3077 value -= bfd_get_section_vma (abfd, section);
3079 case N_SETD: case N_SETD | N_EXT:
3080 section = obj_datasec (abfd);
3081 flags |= BSF_CONSTRUCTOR;
3082 value -= bfd_get_section_vma (abfd, section);
3084 case N_SETB: case N_SETB | N_EXT:
3085 section = obj_bsssec (abfd);
3086 flags |= BSF_CONSTRUCTOR;
3087 value -= bfd_get_section_vma (abfd, section);
3090 /* A warning symbol. The next symbol is the one to warn
3091 about. If there is no next symbol, just look away. */
3096 name = strings + GET_WORD (abfd, p->e_strx);
3097 section = bfd_und_section_ptr;
3098 flags |= BSF_WARNING;
3101 section = bfd_und_section_ptr;
3105 section = bfd_abs_section_ptr;
3109 section = obj_textsec (abfd);
3110 value -= bfd_get_section_vma (abfd, section);
3114 section = obj_datasec (abfd);
3115 value -= bfd_get_section_vma (abfd, section);
3119 section = obj_bsssec (abfd);
3120 value -= bfd_get_section_vma (abfd, section);
3125 if (! ((*add_one_symbol)
3126 (info, abfd, name, flags, section, value, string, copy, FALSE,
3127 (struct bfd_link_hash_entry **) sym_hash)))
3130 /* Restrict the maximum alignment of a common symbol based on
3131 the architecture, since a.out has no way to represent
3132 alignment requirements of a section in a .o file. FIXME:
3133 This isn't quite right: it should use the architecture of the
3134 output file, not the input files. */
3135 if ((*sym_hash)->root.type == bfd_link_hash_common
3136 && ((*sym_hash)->root.u.c.p->alignment_power >
3137 bfd_get_arch_info (abfd)->section_align_power))
3138 (*sym_hash)->root.u.c.p->alignment_power =
3139 bfd_get_arch_info (abfd)->section_align_power;
3141 /* If this is a set symbol, and we are not building sets, then
3142 it is possible for the hash entry to not have been set. In
3143 such a case, treat the symbol as not globally defined. */
3144 if ((*sym_hash)->root.type == bfd_link_hash_new)
3146 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3150 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3157 /* Free up the internal symbols read from an a.out file. */
3160 aout_link_free_symbols (bfd *abfd)
3162 if (obj_aout_external_syms (abfd) != NULL)
3165 bfd_free_window (&obj_aout_sym_window (abfd));
3167 free ((void *) obj_aout_external_syms (abfd));
3169 obj_aout_external_syms (abfd) = NULL;
3171 if (obj_aout_external_strings (abfd) != NULL)
3174 bfd_free_window (&obj_aout_string_window (abfd));
3176 free ((void *) obj_aout_external_strings (abfd));
3178 obj_aout_external_strings (abfd) = NULL;
3183 /* Add symbols from an a.out object file. */
3186 aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
3188 if (! aout_get_external_symbols (abfd))
3190 if (! aout_link_add_symbols (abfd, info))
3192 if (! info->keep_memory)
3194 if (! aout_link_free_symbols (abfd))
3200 /* Look through the internal symbols to see if this object file should
3201 be included in the link. We should include this object file if it
3202 defines any symbols which are currently undefined. If this object
3203 file defines a common symbol, then we may adjust the size of the
3204 known symbol but we do not include the object file in the link
3205 (unless there is some other reason to include it). */
3208 aout_link_check_ar_symbols (bfd *abfd,
3209 struct bfd_link_info *info,
3210 bfd_boolean *pneeded)
3212 struct external_nlist *p;
3213 struct external_nlist *pend;
3218 /* Look through all the symbols. */
3219 p = obj_aout_external_syms (abfd);
3220 pend = p + obj_aout_external_sym_count (abfd);
3221 strings = obj_aout_external_strings (abfd);
3222 for (; p < pend; p++)
3224 int type = H_GET_8 (abfd, p->e_type);
3226 struct bfd_link_hash_entry *h;
3228 /* Ignore symbols that are not externally visible. This is an
3229 optimization only, as we check the type more thoroughly
3231 if (((type & N_EXT) == 0
3232 || (type & N_STAB) != 0
3239 if (type == N_WARNING
3245 name = strings + GET_WORD (abfd, p->e_strx);
3246 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
3248 /* We are only interested in symbols that are currently
3249 undefined or common. */
3251 || (h->type != bfd_link_hash_undefined
3252 && h->type != bfd_link_hash_common))
3254 if (type == (N_INDR | N_EXT))
3259 if (type == (N_TEXT | N_EXT)
3260 || type == (N_DATA | N_EXT)
3261 || type == (N_BSS | N_EXT)
3262 || type == (N_ABS | N_EXT)
3263 || type == (N_INDR | N_EXT))
3265 /* This object file defines this symbol. We must link it
3266 in. This is true regardless of whether the current
3267 definition of the symbol is undefined or common.
3269 If the current definition is common, we have a case in
3270 which we have already seen an object file including:
3272 and this object file from the archive includes:
3274 In such a case, whether to include this object is target
3275 dependant for backward compatibility.
3277 FIXME: The SunOS 4.1.3 linker will pull in the archive
3278 element if the symbol is defined in the .data section,
3279 but not if it is defined in the .text section. That
3280 seems a bit crazy to me, and it has not been implemented
3281 yet. However, it might be correct. */
3282 if (h->type == bfd_link_hash_common)
3286 switch (info->common_skip_ar_aymbols)
3288 case bfd_link_common_skip_text:
3289 skip = (type == (N_TEXT | N_EXT));
3291 case bfd_link_common_skip_data:
3292 skip = (type == (N_DATA | N_EXT));
3295 case bfd_link_common_skip_all:
3304 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3310 if (type == (N_UNDF | N_EXT))
3314 value = GET_WORD (abfd, p->e_value);
3317 /* This symbol is common in the object from the archive
3319 if (h->type == bfd_link_hash_undefined)
3324 symbfd = h->u.undef.abfd;
3327 /* This symbol was created as undefined from
3328 outside BFD. We assume that we should link
3329 in the object file. This is done for the -u
3330 option in the linker. */
3331 if (! (*info->callbacks->add_archive_element) (info,
3338 /* Turn the current link symbol into a common
3339 symbol. It is already on the undefs list. */
3340 h->type = bfd_link_hash_common;
3341 h->u.c.p = bfd_hash_allocate (&info->hash->table,
3342 sizeof (struct bfd_link_hash_common_entry));
3343 if (h->u.c.p == NULL)
3346 h->u.c.size = value;
3348 /* FIXME: This isn't quite right. The maximum
3349 alignment of a common symbol should be set by the
3350 architecture of the output file, not of the input
3352 power = bfd_log2 (value);
3353 if (power > bfd_get_arch_info (abfd)->section_align_power)
3354 power = bfd_get_arch_info (abfd)->section_align_power;
3355 h->u.c.p->alignment_power = power;
3357 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3362 /* Adjust the size of the common symbol if
3364 if (value > h->u.c.size)
3365 h->u.c.size = value;
3375 /* This symbol is weak but defined. We must pull it in if
3376 the current link symbol is undefined, but we don't want
3377 it if the current link symbol is common. */
3378 if (h->type == bfd_link_hash_undefined)
3380 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3388 /* We do not need this object file. */
3391 /* Check a single archive element to see if we need to include it in
3392 the link. *PNEEDED is set according to whether this element is
3393 needed in the link or not. This is called from
3394 _bfd_generic_link_add_archive_symbols. */
3397 aout_link_check_archive_element (bfd *abfd,
3398 struct bfd_link_info *info,
3399 bfd_boolean *pneeded)
3401 if (! aout_get_external_symbols (abfd))
3404 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3409 if (! aout_link_add_symbols (abfd, info))
3413 if (! info->keep_memory || ! *pneeded)
3415 if (! aout_link_free_symbols (abfd))
3422 /* Given an a.out BFD, add symbols to the global hash table as
3426 NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
3428 switch (bfd_get_format (abfd))
3431 return aout_link_add_object_symbols (abfd, info);
3433 return _bfd_generic_link_add_archive_symbols
3434 (abfd, info, aout_link_check_archive_element);
3436 bfd_set_error (bfd_error_wrong_format);
3441 /* A hash table used for header files with N_BINCL entries. */
3443 struct aout_link_includes_table
3445 struct bfd_hash_table root;
3448 /* A linked list of totals that we have found for a particular header
3451 struct aout_link_includes_totals
3453 struct aout_link_includes_totals *next;
3457 /* An entry in the header file hash table. */
3459 struct aout_link_includes_entry
3461 struct bfd_hash_entry root;
3462 /* List of totals we have found for this file. */
3463 struct aout_link_includes_totals *totals;
3466 /* Look up an entry in an the header file hash table. */
3468 #define aout_link_includes_lookup(table, string, create, copy) \
3469 ((struct aout_link_includes_entry *) \
3470 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3472 /* During the final link step we need to pass around a bunch of
3473 information, so we do it in an instance of this structure. */
3475 struct aout_final_link_info
3477 /* General link information. */
3478 struct bfd_link_info *info;
3481 /* Reloc file positions. */
3482 file_ptr treloff, dreloff;
3483 /* File position of symbols. */
3486 struct bfd_strtab_hash *strtab;
3487 /* Header file hash table. */
3488 struct aout_link_includes_table includes;
3489 /* A buffer large enough to hold the contents of any section. */
3491 /* A buffer large enough to hold the relocs of any section. */
3493 /* A buffer large enough to hold the symbol map of any input BFD. */
3495 /* A buffer large enough to hold output symbols of any input BFD. */
3496 struct external_nlist *output_syms;
3499 /* The function to create a new entry in the header file hash table. */
3501 static struct bfd_hash_entry *
3502 aout_link_includes_newfunc (struct bfd_hash_entry *entry,
3503 struct bfd_hash_table *table,
3506 struct aout_link_includes_entry *ret =
3507 (struct aout_link_includes_entry *) entry;
3509 /* Allocate the structure if it has not already been allocated by a
3512 ret = bfd_hash_allocate (table, sizeof (* ret));
3516 /* Call the allocation method of the superclass. */
3517 ret = ((struct aout_link_includes_entry *)
3518 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3521 /* Set local fields. */
3525 return (struct bfd_hash_entry *) ret;
3528 /* Write out a symbol that was not associated with an a.out input
3532 aout_link_write_other_symbol (struct aout_link_hash_entry *h, void * data)
3534 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
3538 struct external_nlist outsym;
3542 if (h->root.type == bfd_link_hash_warning)
3544 h = (struct aout_link_hash_entry *) h->root.u.i.link;
3545 if (h->root.type == bfd_link_hash_new)
3549 output_bfd = finfo->output_bfd;
3551 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3553 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3554 (output_bfd, finfo->info, h)))
3556 /* FIXME: No way to handle errors. */
3566 /* An indx of -2 means the symbol must be written. */
3568 && (finfo->info->strip == strip_all
3569 || (finfo->info->strip == strip_some
3570 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
3571 FALSE, FALSE) == NULL)))
3574 switch (h->root.type)
3577 case bfd_link_hash_warning:
3579 /* Avoid variable not initialized warnings. */
3581 case bfd_link_hash_new:
3582 /* This can happen for set symbols when sets are not being
3585 case bfd_link_hash_undefined:
3586 type = N_UNDF | N_EXT;
3589 case bfd_link_hash_defined:
3590 case bfd_link_hash_defweak:
3594 sec = h->root.u.def.section->output_section;
3595 BFD_ASSERT (bfd_is_abs_section (sec)
3596 || sec->owner == output_bfd);
3597 if (sec == obj_textsec (output_bfd))
3598 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
3599 else if (sec == obj_datasec (output_bfd))
3600 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
3601 else if (sec == obj_bsssec (output_bfd))
3602 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
3604 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
3606 val = (h->root.u.def.value
3608 + h->root.u.def.section->output_offset);
3611 case bfd_link_hash_common:
3612 type = N_UNDF | N_EXT;
3613 val = h->root.u.c.size;
3615 case bfd_link_hash_undefweak:
3618 case bfd_link_hash_indirect:
3619 /* We ignore these symbols, since the indirected symbol is
3620 already in the hash table. */
3624 H_PUT_8 (output_bfd, type, outsym.e_type);
3625 H_PUT_8 (output_bfd, 0, outsym.e_other);
3626 H_PUT_16 (output_bfd, 0, outsym.e_desc);
3627 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
3629 if (indx == - (bfd_size_type) 1)
3630 /* FIXME: No way to handle errors. */
3633 PUT_WORD (output_bfd, indx, outsym.e_strx);
3634 PUT_WORD (output_bfd, val, outsym.e_value);
3636 amt = EXTERNAL_NLIST_SIZE;
3637 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
3638 || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
3639 /* FIXME: No way to handle errors. */
3642 finfo->symoff += EXTERNAL_NLIST_SIZE;
3643 h->indx = obj_aout_external_sym_count (output_bfd);
3644 ++obj_aout_external_sym_count (output_bfd);
3649 /* Handle a link order which is supposed to generate a reloc. */
3652 aout_link_reloc_link_order (struct aout_final_link_info *finfo,
3654 struct bfd_link_order *p)
3656 struct bfd_link_order_reloc *pr;
3659 reloc_howto_type *howto;
3660 file_ptr *reloff_ptr = NULL;
3661 struct reloc_std_external srel;
3662 struct reloc_ext_external erel;
3668 if (p->type == bfd_section_reloc_link_order)
3671 if (bfd_is_abs_section (pr->u.section))
3672 r_index = N_ABS | N_EXT;
3675 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
3676 r_index = pr->u.section->target_index;
3681 struct aout_link_hash_entry *h;
3683 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
3685 h = ((struct aout_link_hash_entry *)
3686 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
3687 pr->u.name, FALSE, FALSE, TRUE));
3693 /* We decided to strip this symbol, but it turns out that we
3694 can't. Note that we lose the other and desc information
3695 here. I don't think that will ever matter for a global
3699 if (! aout_link_write_other_symbol (h, (void *) finfo))
3705 if (! ((*finfo->info->callbacks->unattached_reloc)
3706 (finfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0)))
3712 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
3715 bfd_set_error (bfd_error_bad_value);
3719 if (o == obj_textsec (finfo->output_bfd))
3720 reloff_ptr = &finfo->treloff;
3721 else if (o == obj_datasec (finfo->output_bfd))
3722 reloff_ptr = &finfo->dreloff;
3726 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
3729 MY_put_reloc (finfo->output_bfd, r_extern, r_index, p->offset, howto,
3739 r_pcrel = (int) howto->pc_relative;
3740 r_baserel = (howto->type & 8) != 0;
3741 r_jmptable = (howto->type & 16) != 0;
3742 r_relative = (howto->type & 32) != 0;
3743 r_length = howto->size;
3745 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
3746 if (bfd_header_big_endian (finfo->output_bfd))
3748 srel.r_index[0] = r_index >> 16;
3749 srel.r_index[1] = r_index >> 8;
3750 srel.r_index[2] = r_index;
3752 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
3753 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
3754 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
3755 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
3756 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
3757 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
3761 srel.r_index[2] = r_index >> 16;
3762 srel.r_index[1] = r_index >> 8;
3763 srel.r_index[0] = r_index;
3765 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
3766 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
3767 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
3768 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
3769 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
3770 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
3774 rel_ptr = (void *) &srel;
3776 /* We have to write the addend into the object file, since
3777 standard a.out relocs are in place. It would be more
3778 reliable if we had the current contents of the file here,
3779 rather than assuming zeroes, but we can't read the file since
3780 it was opened using bfd_openw. */
3781 if (pr->addend != 0)
3784 bfd_reloc_status_type r;
3788 size = bfd_get_reloc_size (howto);
3789 buf = bfd_zmalloc (size);
3792 r = MY_relocate_contents (howto, finfo->output_bfd,
3793 (bfd_vma) pr->addend, buf);
3799 case bfd_reloc_outofrange:
3801 case bfd_reloc_overflow:
3802 if (! ((*finfo->info->callbacks->reloc_overflow)
3804 (p->type == bfd_section_reloc_link_order
3805 ? bfd_section_name (finfo->output_bfd,
3808 howto->name, pr->addend, NULL, NULL, (bfd_vma) 0)))
3815 ok = bfd_set_section_contents (finfo->output_bfd, o, (void *) buf,
3816 (file_ptr) p->offset, size);
3824 #ifdef MY_put_ext_reloc
3825 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
3826 howto, &erel, pr->addend);
3828 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
3830 if (bfd_header_big_endian (finfo->output_bfd))
3832 erel.r_index[0] = r_index >> 16;
3833 erel.r_index[1] = r_index >> 8;
3834 erel.r_index[2] = r_index;
3836 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
3837 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
3841 erel.r_index[2] = r_index >> 16;
3842 erel.r_index[1] = r_index >> 8;
3843 erel.r_index[0] = r_index;
3845 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
3846 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
3849 PUT_WORD (finfo->output_bfd, (bfd_vma) pr->addend, erel.r_addend);
3850 #endif /* MY_put_ext_reloc */
3852 rel_ptr = (void *) &erel;
3855 amt = obj_reloc_entry_size (finfo->output_bfd);
3856 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
3857 || bfd_bwrite (rel_ptr, amt, finfo->output_bfd) != amt)
3860 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
3862 /* Assert that the relocs have not run into the symbols, and that n
3863 the text relocs have not run into the data relocs. */
3864 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
3865 && (reloff_ptr != &finfo->treloff
3867 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
3872 /* Get the section corresponding to a reloc index. */
3874 static INLINE asection *
3875 aout_reloc_index_to_section (bfd *abfd, int indx)
3877 switch (indx & N_TYPE)
3879 case N_TEXT: return obj_textsec (abfd);
3880 case N_DATA: return obj_datasec (abfd);
3881 case N_BSS: return obj_bsssec (abfd);
3883 case N_UNDF: return bfd_abs_section_ptr;
3889 /* Relocate an a.out section using standard a.out relocs. */
3892 aout_link_input_section_std (struct aout_final_link_info *finfo,
3894 asection *input_section,
3895 struct reloc_std_external *relocs,
3896 bfd_size_type rel_size,
3899 bfd_boolean (*check_dynamic_reloc)
3900 (struct bfd_link_info *, bfd *, asection *,
3901 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
3904 bfd_boolean relocatable;
3905 struct external_nlist *syms;
3907 struct aout_link_hash_entry **sym_hashes;
3909 bfd_size_type reloc_count;
3910 struct reloc_std_external *rel;
3911 struct reloc_std_external *rel_end;
3913 output_bfd = finfo->output_bfd;
3914 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
3916 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
3917 BFD_ASSERT (input_bfd->xvec->header_byteorder
3918 == output_bfd->xvec->header_byteorder);
3920 relocatable = finfo->info->relocatable;
3921 syms = obj_aout_external_syms (input_bfd);
3922 strings = obj_aout_external_strings (input_bfd);
3923 sym_hashes = obj_aout_sym_hashes (input_bfd);
3924 symbol_map = finfo->symbol_map;
3926 reloc_count = rel_size / RELOC_STD_SIZE;
3928 rel_end = rel + reloc_count;
3929 for (; rel < rel_end; rel++)
3936 reloc_howto_type *howto;
3937 struct aout_link_hash_entry *h = NULL;
3939 bfd_reloc_status_type r;
3941 r_addr = GET_SWORD (input_bfd, rel->r_address);
3943 #ifdef MY_reloc_howto
3944 howto = MY_reloc_howto (input_bfd, rel, r_index, r_extern, r_pcrel);
3950 unsigned int howto_idx;
3952 if (bfd_header_big_endian (input_bfd))
3954 r_index = (((unsigned int) rel->r_index[0] << 16)
3955 | ((unsigned int) rel->r_index[1] << 8)
3957 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
3958 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
3959 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
3960 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
3961 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
3962 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
3963 >> RELOC_STD_BITS_LENGTH_SH_BIG);
3967 r_index = (((unsigned int) rel->r_index[2] << 16)
3968 | ((unsigned int) rel->r_index[1] << 8)
3970 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
3971 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
3972 r_baserel = (0 != (rel->r_type[0]
3973 & RELOC_STD_BITS_BASEREL_LITTLE));
3974 r_jmptable= (0 != (rel->r_type[0]
3975 & RELOC_STD_BITS_JMPTABLE_LITTLE));
3976 r_relative= (0 != (rel->r_type[0]
3977 & RELOC_STD_BITS_RELATIVE_LITTLE));
3978 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
3979 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
3982 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
3983 + 16 * r_jmptable + 32 * r_relative);
3984 if (howto_idx < TABLE_SIZE (howto_table_std))
3985 howto = howto_table_std + howto_idx;
3993 (*finfo->info->callbacks->einfo)
3994 (_("%P: %B: unexpected relocation type\n"), input_bfd);
3995 bfd_set_error (bfd_error_bad_value);
4001 /* We are generating a relocatable output file, and must
4002 modify the reloc accordingly. */
4005 /* If we know the symbol this relocation is against,
4006 convert it into a relocation against a section. This
4007 is what the native linker does. */
4008 h = sym_hashes[r_index];
4010 && (h->root.type == bfd_link_hash_defined
4011 || h->root.type == bfd_link_hash_defweak))
4013 asection *output_section;
4015 /* Change the r_extern value. */
4016 if (bfd_header_big_endian (output_bfd))
4017 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4019 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4021 /* Compute a new r_index. */
4022 output_section = h->root.u.def.section->output_section;
4023 if (output_section == obj_textsec (output_bfd))
4025 else if (output_section == obj_datasec (output_bfd))
4027 else if (output_section == obj_bsssec (output_bfd))
4032 /* Add the symbol value and the section VMA to the
4033 addend stored in the contents. */
4034 relocation = (h->root.u.def.value
4035 + output_section->vma
4036 + h->root.u.def.section->output_offset);
4040 /* We must change r_index according to the symbol
4042 r_index = symbol_map[r_index];
4048 /* We decided to strip this symbol, but it
4049 turns out that we can't. Note that we
4050 lose the other and desc information here.
4051 I don't think that will ever matter for a
4057 if (! aout_link_write_other_symbol (h,
4067 name = strings + GET_WORD (input_bfd,
4068 syms[r_index].e_strx);
4069 if (! ((*finfo->info->callbacks->unattached_reloc)
4070 (finfo->info, name, input_bfd, input_section,
4080 /* Write out the new r_index value. */
4081 if (bfd_header_big_endian (output_bfd))
4083 rel->r_index[0] = r_index >> 16;
4084 rel->r_index[1] = r_index >> 8;
4085 rel->r_index[2] = r_index;
4089 rel->r_index[2] = r_index >> 16;
4090 rel->r_index[1] = r_index >> 8;
4091 rel->r_index[0] = r_index;
4098 /* This is a relocation against a section. We must
4099 adjust by the amount that the section moved. */
4100 section = aout_reloc_index_to_section (input_bfd, r_index);
4101 relocation = (section->output_section->vma
4102 + section->output_offset
4106 /* Change the address of the relocation. */
4107 PUT_WORD (output_bfd,
4108 r_addr + input_section->output_offset,
4111 /* Adjust a PC relative relocation by removing the reference
4112 to the original address in the section and including the
4113 reference to the new address. */
4115 relocation -= (input_section->output_section->vma
4116 + input_section->output_offset
4117 - input_section->vma);
4119 #ifdef MY_relocatable_reloc
4120 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4123 if (relocation == 0)
4126 r = MY_relocate_contents (howto,
4127 input_bfd, relocation,
4134 /* We are generating an executable, and must do a full
4140 h = sym_hashes[r_index];
4143 && (h->root.type == bfd_link_hash_defined
4144 || h->root.type == bfd_link_hash_defweak))
4146 relocation = (h->root.u.def.value
4147 + h->root.u.def.section->output_section->vma
4148 + h->root.u.def.section->output_offset);
4151 && h->root.type == bfd_link_hash_undefweak)
4163 section = aout_reloc_index_to_section (input_bfd, r_index);
4164 relocation = (section->output_section->vma
4165 + section->output_offset
4168 relocation += input_section->vma;
4171 if (check_dynamic_reloc != NULL)
4175 if (! ((*check_dynamic_reloc)
4176 (finfo->info, input_bfd, input_section, h,
4177 (void *) rel, contents, &skip, &relocation)))
4183 /* Now warn if a global symbol is undefined. We could not
4184 do this earlier, because check_dynamic_reloc might want
4185 to skip this reloc. */
4186 if (hundef && ! finfo->info->shared && ! r_baserel)
4191 name = h->root.root.string;
4193 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4194 if (! ((*finfo->info->callbacks->undefined_symbol)
4195 (finfo->info, name, input_bfd, input_section,
4200 r = MY_final_link_relocate (howto,
4201 input_bfd, input_section,
4202 contents, r_addr, relocation,
4206 if (r != bfd_reloc_ok)
4211 case bfd_reloc_outofrange:
4213 case bfd_reloc_overflow:
4220 name = strings + GET_WORD (input_bfd,
4221 syms[r_index].e_strx);
4226 s = aout_reloc_index_to_section (input_bfd, r_index);
4227 name = bfd_section_name (input_bfd, s);
4229 if (! ((*finfo->info->callbacks->reloc_overflow)
4230 (finfo->info, (h ? &h->root : NULL), name,
4231 howto->name, (bfd_vma) 0, input_bfd,
4232 input_section, r_addr)))
4243 /* Relocate an a.out section using extended a.out relocs. */
4246 aout_link_input_section_ext (struct aout_final_link_info *finfo,
4248 asection *input_section,
4249 struct reloc_ext_external *relocs,
4250 bfd_size_type rel_size,
4253 bfd_boolean (*check_dynamic_reloc)
4254 (struct bfd_link_info *, bfd *, asection *,
4255 struct aout_link_hash_entry *, void *, bfd_byte *, bfd_boolean *,
4258 bfd_boolean relocatable;
4259 struct external_nlist *syms;
4261 struct aout_link_hash_entry **sym_hashes;
4263 bfd_size_type reloc_count;
4264 struct reloc_ext_external *rel;
4265 struct reloc_ext_external *rel_end;
4267 output_bfd = finfo->output_bfd;
4268 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4270 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4271 BFD_ASSERT (input_bfd->xvec->header_byteorder
4272 == output_bfd->xvec->header_byteorder);
4274 relocatable = finfo->info->relocatable;
4275 syms = obj_aout_external_syms (input_bfd);
4276 strings = obj_aout_external_strings (input_bfd);
4277 sym_hashes = obj_aout_sym_hashes (input_bfd);
4278 symbol_map = finfo->symbol_map;
4280 reloc_count = rel_size / RELOC_EXT_SIZE;
4282 rel_end = rel + reloc_count;
4283 for (; rel < rel_end; rel++)
4288 unsigned int r_type;
4290 struct aout_link_hash_entry *h = NULL;
4291 asection *r_section = NULL;
4294 r_addr = GET_SWORD (input_bfd, rel->r_address);
4296 if (bfd_header_big_endian (input_bfd))
4298 r_index = (((unsigned int) rel->r_index[0] << 16)
4299 | ((unsigned int) rel->r_index[1] << 8)
4301 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4302 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4303 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4307 r_index = (((unsigned int) rel->r_index[2] << 16)
4308 | ((unsigned int) rel->r_index[1] << 8)
4310 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4311 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4312 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4315 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4317 if (r_type >= TABLE_SIZE (howto_table_ext))
4319 (*finfo->info->callbacks->einfo)
4320 (_("%P: %B: unexpected relocation type\n"), input_bfd);
4321 bfd_set_error (bfd_error_bad_value);
4327 /* We are generating a relocatable output file, and must
4328 modify the reloc accordingly. */
4330 || r_type == (unsigned int) RELOC_BASE10
4331 || r_type == (unsigned int) RELOC_BASE13
4332 || r_type == (unsigned int) RELOC_BASE22)
4334 /* If we know the symbol this relocation is against,
4335 convert it into a relocation against a section. This
4336 is what the native linker does. */
4337 if (r_type == (unsigned int) RELOC_BASE10
4338 || r_type == (unsigned int) RELOC_BASE13
4339 || r_type == (unsigned int) RELOC_BASE22)
4342 h = sym_hashes[r_index];
4344 && (h->root.type == bfd_link_hash_defined
4345 || h->root.type == bfd_link_hash_defweak))
4347 asection *output_section;
4349 /* Change the r_extern value. */
4350 if (bfd_header_big_endian (output_bfd))
4351 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4353 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4355 /* Compute a new r_index. */
4356 output_section = h->root.u.def.section->output_section;
4357 if (output_section == obj_textsec (output_bfd))
4359 else if (output_section == obj_datasec (output_bfd))
4361 else if (output_section == obj_bsssec (output_bfd))
4366 /* Add the symbol value and the section VMA to the
4368 relocation = (h->root.u.def.value
4369 + output_section->vma
4370 + h->root.u.def.section->output_offset);
4372 /* Now RELOCATION is the VMA of the final
4373 destination. If this is a PC relative reloc,
4374 then ADDEND is the negative of the source VMA.
4375 We want to set ADDEND to the difference between
4376 the destination VMA and the source VMA, which
4377 means we must adjust RELOCATION by the change in
4378 the source VMA. This is done below. */
4382 /* We must change r_index according to the symbol
4384 r_index = symbol_map[r_index];
4390 /* We decided to strip this symbol, but it
4391 turns out that we can't. Note that we
4392 lose the other and desc information here.
4393 I don't think that will ever matter for a
4399 if (! aout_link_write_other_symbol (h,
4409 name = strings + GET_WORD (input_bfd,
4410 syms[r_index].e_strx);
4411 if (! ((*finfo->info->callbacks->unattached_reloc)
4412 (finfo->info, name, input_bfd, input_section,
4421 /* If this is a PC relative reloc, then the addend
4422 is the negative of the source VMA. We must
4423 adjust it by the change in the source VMA. This
4427 /* Write out the new r_index value. */
4428 if (bfd_header_big_endian (output_bfd))
4430 rel->r_index[0] = r_index >> 16;
4431 rel->r_index[1] = r_index >> 8;
4432 rel->r_index[2] = r_index;
4436 rel->r_index[2] = r_index >> 16;
4437 rel->r_index[1] = r_index >> 8;
4438 rel->r_index[0] = r_index;
4443 /* This is a relocation against a section. We must
4444 adjust by the amount that the section moved. */
4445 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4446 relocation = (r_section->output_section->vma
4447 + r_section->output_offset
4450 /* If this is a PC relative reloc, then the addend is
4451 the difference in VMA between the destination and the
4452 source. We have just adjusted for the change in VMA
4453 of the destination, so we must also adjust by the
4454 change in VMA of the source. This is done below. */
4457 /* As described above, we must always adjust a PC relative
4458 reloc by the change in VMA of the source. However, if
4459 pcrel_offset is set, then the addend does not include the
4460 location within the section, in which case we don't need
4461 to adjust anything. */
4462 if (howto_table_ext[r_type].pc_relative
4463 && ! howto_table_ext[r_type].pcrel_offset)
4464 relocation -= (input_section->output_section->vma
4465 + input_section->output_offset
4466 - input_section->vma);
4468 /* Change the addend if necessary. */
4469 if (relocation != 0)
4470 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4472 /* Change the address of the relocation. */
4473 PUT_WORD (output_bfd,
4474 r_addr + input_section->output_offset,
4480 bfd_reloc_status_type r;
4482 /* We are generating an executable, and must do a full
4488 h = sym_hashes[r_index];
4491 && (h->root.type == bfd_link_hash_defined
4492 || h->root.type == bfd_link_hash_defweak))
4494 relocation = (h->root.u.def.value
4495 + h->root.u.def.section->output_section->vma
4496 + h->root.u.def.section->output_offset);
4499 && h->root.type == bfd_link_hash_undefweak)
4507 else if (r_type == (unsigned int) RELOC_BASE10
4508 || r_type == (unsigned int) RELOC_BASE13
4509 || r_type == (unsigned int) RELOC_BASE22)
4511 struct external_nlist *sym;
4514 /* For base relative relocs, r_index is always an index
4515 into the symbol table, even if r_extern is 0. */
4516 sym = syms + r_index;
4517 type = H_GET_8 (input_bfd, sym->e_type);
4518 if ((type & N_TYPE) == N_TEXT
4520 r_section = obj_textsec (input_bfd);
4521 else if ((type & N_TYPE) == N_DATA
4523 r_section = obj_datasec (input_bfd);
4524 else if ((type & N_TYPE) == N_BSS
4526 r_section = obj_bsssec (input_bfd);
4527 else if ((type & N_TYPE) == N_ABS
4529 r_section = bfd_abs_section_ptr;
4532 relocation = (r_section->output_section->vma
4533 + r_section->output_offset
4534 + (GET_WORD (input_bfd, sym->e_value)
4539 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4541 /* If this is a PC relative reloc, then R_ADDEND is the
4542 difference between the two vmas, or
4543 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4545 old_dest_sec == section->vma
4547 old_src_sec == input_section->vma
4549 old_src_off == r_addr
4551 _bfd_final_link_relocate expects RELOCATION +
4552 R_ADDEND to be the VMA of the destination minus
4553 r_addr (the minus r_addr is because this relocation
4554 is not pcrel_offset, which is a bit confusing and
4555 should, perhaps, be changed), or
4558 new_dest_sec == output_section->vma + output_offset
4559 We arrange for this to happen by setting RELOCATION to
4560 new_dest_sec + old_src_sec - old_dest_sec
4562 If this is not a PC relative reloc, then R_ADDEND is
4563 simply the VMA of the destination, so we set
4564 RELOCATION to the change in the destination VMA, or
4565 new_dest_sec - old_dest_sec
4567 relocation = (r_section->output_section->vma
4568 + r_section->output_offset
4570 if (howto_table_ext[r_type].pc_relative)
4571 relocation += input_section->vma;
4574 if (check_dynamic_reloc != NULL)
4578 if (! ((*check_dynamic_reloc)
4579 (finfo->info, input_bfd, input_section, h,
4580 (void *) rel, contents, &skip, &relocation)))
4586 /* Now warn if a global symbol is undefined. We could not
4587 do this earlier, because check_dynamic_reloc might want
4588 to skip this reloc. */
4590 && ! finfo->info->shared
4591 && r_type != (unsigned int) RELOC_BASE10
4592 && r_type != (unsigned int) RELOC_BASE13
4593 && r_type != (unsigned int) RELOC_BASE22)
4598 name = h->root.root.string;
4600 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4601 if (! ((*finfo->info->callbacks->undefined_symbol)
4602 (finfo->info, name, input_bfd, input_section,
4607 if (r_type != (unsigned int) RELOC_SPARC_REV32)
4608 r = MY_final_link_relocate (howto_table_ext + r_type,
4609 input_bfd, input_section,
4610 contents, r_addr, relocation,
4616 x = bfd_get_32 (input_bfd, contents + r_addr);
4617 x = x + relocation + r_addend;
4618 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
4622 if (r != bfd_reloc_ok)
4627 case bfd_reloc_outofrange:
4629 case bfd_reloc_overflow:
4636 || r_type == (unsigned int) RELOC_BASE10
4637 || r_type == (unsigned int) RELOC_BASE13
4638 || r_type == (unsigned int) RELOC_BASE22)
4639 name = strings + GET_WORD (input_bfd,
4640 syms[r_index].e_strx);
4645 s = aout_reloc_index_to_section (input_bfd, r_index);
4646 name = bfd_section_name (input_bfd, s);
4648 if (! ((*finfo->info->callbacks->reloc_overflow)
4649 (finfo->info, (h ? &h->root : NULL), name,
4650 howto_table_ext[r_type].name,
4651 r_addend, input_bfd, input_section, r_addr)))
4663 /* Link an a.out section into the output file. */
4666 aout_link_input_section (struct aout_final_link_info *finfo,
4668 asection *input_section,
4669 file_ptr *reloff_ptr,
4670 bfd_size_type rel_size)
4672 bfd_size_type input_size;
4675 /* Get the section contents. */
4676 input_size = input_section->size;
4677 if (! bfd_get_section_contents (input_bfd, input_section,
4678 (void *) finfo->contents,
4679 (file_ptr) 0, input_size))
4682 /* Read in the relocs if we haven't already done it. */
4683 if (aout_section_data (input_section) != NULL
4684 && aout_section_data (input_section)->relocs != NULL)
4685 relocs = aout_section_data (input_section)->relocs;
4688 relocs = finfo->relocs;
4691 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4692 || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
4697 /* Relocate the section contents. */
4698 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4700 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4701 (struct reloc_std_external *) relocs,
4702 rel_size, finfo->contents))
4707 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4708 (struct reloc_ext_external *) relocs,
4709 rel_size, finfo->contents))
4713 /* Write out the section contents. */
4714 if (! bfd_set_section_contents (finfo->output_bfd,
4715 input_section->output_section,
4716 (void *) finfo->contents,
4717 (file_ptr) input_section->output_offset,
4721 /* If we are producing relocatable output, the relocs were
4722 modified, and we now write them out. */
4723 if (finfo->info->relocatable && rel_size > 0)
4725 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4727 if (bfd_bwrite (relocs, rel_size, finfo->output_bfd) != rel_size)
4729 *reloff_ptr += rel_size;
4731 /* Assert that the relocs have not run into the symbols, and
4732 that if these are the text relocs they have not run into the
4734 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4735 && (reloff_ptr != &finfo->treloff
4737 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4743 /* Adjust and write out the symbols for an a.out file. Set the new
4744 symbol indices into a symbol_map. */
4747 aout_link_write_symbols (struct aout_final_link_info *finfo, bfd *input_bfd)
4750 bfd_size_type sym_count;
4752 enum bfd_link_strip strip;
4753 enum bfd_link_discard discard;
4754 struct external_nlist *outsym;
4755 bfd_size_type strtab_index;
4756 struct external_nlist *sym;
4757 struct external_nlist *sym_end;
4758 struct aout_link_hash_entry **sym_hash;
4761 bfd_boolean skip_next;
4763 output_bfd = finfo->output_bfd;
4764 sym_count = obj_aout_external_sym_count (input_bfd);
4765 strings = obj_aout_external_strings (input_bfd);
4766 strip = finfo->info->strip;
4767 discard = finfo->info->discard;
4768 outsym = finfo->output_syms;
4770 /* First write out a symbol for this object file, unless we are
4771 discarding such symbols. */
4772 if (strip != strip_all
4773 && (strip != strip_some
4774 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4775 FALSE, FALSE) != NULL)
4776 && discard != discard_all)
4778 H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
4779 H_PUT_8 (output_bfd, 0, outsym->e_other);
4780 H_PUT_16 (output_bfd, 0, outsym->e_desc);
4781 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4782 input_bfd->filename, FALSE);
4783 if (strtab_index == (bfd_size_type) -1)
4785 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4786 PUT_WORD (output_bfd,
4787 (bfd_get_section_vma (output_bfd,
4788 obj_textsec (input_bfd)->output_section)
4789 + obj_textsec (input_bfd)->output_offset),
4791 ++obj_aout_external_sym_count (output_bfd);
4797 sym = obj_aout_external_syms (input_bfd);
4798 sym_end = sym + sym_count;
4799 sym_hash = obj_aout_sym_hashes (input_bfd);
4800 symbol_map = finfo->symbol_map;
4801 memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
4802 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4806 struct aout_link_hash_entry *h;
4812 /* We set *symbol_map to 0 above for all symbols. If it has
4813 already been set to -1 for this symbol, it means that we are
4814 discarding it because it appears in a duplicate header file.
4815 See the N_BINCL code below. */
4816 if (*symbol_map == -1)
4819 /* Initialize *symbol_map to -1, which means that the symbol was
4820 not copied into the output file. We will change it later if
4821 we do copy the symbol over. */
4824 type = H_GET_8 (input_bfd, sym->e_type);
4825 name = strings + GET_WORD (input_bfd, sym->e_strx);
4831 /* Pass this symbol through. It is the target of an
4832 indirect or warning symbol. */
4833 val = GET_WORD (input_bfd, sym->e_value);
4838 /* Skip this symbol, which is the target of an indirect
4839 symbol that we have changed to no longer be an indirect
4846 struct aout_link_hash_entry *hresolve;
4848 /* We have saved the hash table entry for this symbol, if
4849 there is one. Note that we could just look it up again
4850 in the hash table, provided we first check that it is an
4854 /* Use the name from the hash table, in case the symbol was
4857 && h->root.type != bfd_link_hash_warning)
4858 name = h->root.root.string;
4860 /* If this is an indirect or warning symbol, then change
4861 hresolve to the base symbol. We also change *sym_hash so
4862 that the relocation routines relocate against the real
4865 if (h != (struct aout_link_hash_entry *) NULL
4866 && (h->root.type == bfd_link_hash_indirect
4867 || h->root.type == bfd_link_hash_warning))
4869 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4870 while (hresolve->root.type == bfd_link_hash_indirect
4871 || hresolve->root.type == bfd_link_hash_warning)
4872 hresolve = ((struct aout_link_hash_entry *)
4873 hresolve->root.u.i.link);
4874 *sym_hash = hresolve;
4877 /* If the symbol has already been written out, skip it. */
4881 if ((type & N_TYPE) == N_INDR
4882 || type == N_WARNING)
4884 *symbol_map = h->indx;
4888 /* See if we are stripping this symbol. */
4894 case strip_debugger:
4895 if ((type & N_STAB) != 0)
4899 if (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE)
4914 /* Get the value of the symbol. */
4915 if ((type & N_TYPE) == N_TEXT
4917 symsec = obj_textsec (input_bfd);
4918 else if ((type & N_TYPE) == N_DATA
4920 symsec = obj_datasec (input_bfd);
4921 else if ((type & N_TYPE) == N_BSS
4923 symsec = obj_bsssec (input_bfd);
4924 else if ((type & N_TYPE) == N_ABS
4926 symsec = bfd_abs_section_ptr;
4927 else if (((type & N_TYPE) == N_INDR
4928 && (hresolve == NULL
4929 || (hresolve->root.type != bfd_link_hash_defined
4930 && hresolve->root.type != bfd_link_hash_defweak
4931 && hresolve->root.type != bfd_link_hash_common)))
4932 || type == N_WARNING)
4934 /* Pass the next symbol through unchanged. The
4935 condition above for indirect symbols is so that if
4936 the indirect symbol was defined, we output it with
4937 the correct definition so the debugger will
4940 val = GET_WORD (input_bfd, sym->e_value);
4943 else if ((type & N_STAB) != 0)
4945 val = GET_WORD (input_bfd, sym->e_value);
4950 /* If we get here with an indirect symbol, it means that
4951 we are outputting it with a real definition. In such
4952 a case we do not want to output the next symbol,
4953 which is the target of the indirection. */
4954 if ((type & N_TYPE) == N_INDR)
4959 /* We need to get the value from the hash table. We use
4960 hresolve so that if we have defined an indirect
4961 symbol we output the final definition. */
4964 switch (type & N_TYPE)
4967 symsec = obj_textsec (input_bfd);
4970 symsec = obj_datasec (input_bfd);
4973 symsec = obj_bsssec (input_bfd);
4976 symsec = bfd_abs_section_ptr;
4983 else if (hresolve->root.type == bfd_link_hash_defined
4984 || hresolve->root.type == bfd_link_hash_defweak)
4986 asection *input_section;
4987 asection *output_section;
4989 /* This case usually means a common symbol which was
4990 turned into a defined symbol. */
4991 input_section = hresolve->root.u.def.section;
4992 output_section = input_section->output_section;
4993 BFD_ASSERT (bfd_is_abs_section (output_section)
4994 || output_section->owner == output_bfd);
4995 val = (hresolve->root.u.def.value
4996 + bfd_get_section_vma (output_bfd, output_section)
4997 + input_section->output_offset);
4999 /* Get the correct type based on the section. If
5000 this is a constructed set, force it to be
5001 globally visible. */
5010 if (output_section == obj_textsec (output_bfd))
5011 type |= (hresolve->root.type == bfd_link_hash_defined
5014 else if (output_section == obj_datasec (output_bfd))
5015 type |= (hresolve->root.type == bfd_link_hash_defined
5018 else if (output_section == obj_bsssec (output_bfd))
5019 type |= (hresolve->root.type == bfd_link_hash_defined
5023 type |= (hresolve->root.type == bfd_link_hash_defined
5027 else if (hresolve->root.type == bfd_link_hash_common)
5028 val = hresolve->root.u.c.size;
5029 else if (hresolve->root.type == bfd_link_hash_undefweak)
5038 val = (symsec->output_section->vma
5039 + symsec->output_offset
5040 + (GET_WORD (input_bfd, sym->e_value)
5043 /* If this is a global symbol set the written flag, and if
5044 it is a local symbol see if we should discard it. */
5048 h->indx = obj_aout_external_sym_count (output_bfd);
5050 else if ((type & N_TYPE) != N_SETT
5051 && (type & N_TYPE) != N_SETD
5052 && (type & N_TYPE) != N_SETB
5053 && (type & N_TYPE) != N_SETA)
5058 case discard_sec_merge:
5061 if ((type & N_STAB) == 0
5062 && bfd_is_local_label_name (input_bfd, name))
5076 /* An N_BINCL symbol indicates the start of the stabs
5077 entries for a header file. We need to scan ahead to the
5078 next N_EINCL symbol, ignoring nesting, adding up all the
5079 characters in the symbol names, not including the file
5080 numbers in types (the first number after an open
5082 if (type == (int) N_BINCL)
5084 struct external_nlist *incl_sym;
5086 struct aout_link_includes_entry *incl_entry;
5087 struct aout_link_includes_totals *t;
5091 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
5095 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5096 if (incl_type == (int) N_EINCL)
5102 else if (incl_type == (int) N_BINCL)
5108 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
5109 for (; *s != '\0'; s++)
5114 /* Skip the file number. */
5116 while (ISDIGIT (*s))
5124 /* If we have already included a header file with the
5125 same value, then replace this one with an N_EXCL
5127 copy = (bfd_boolean) (! finfo->info->keep_memory);
5128 incl_entry = aout_link_includes_lookup (&finfo->includes,
5130 if (incl_entry == NULL)
5132 for (t = incl_entry->totals; t != NULL; t = t->next)
5133 if (t->total == val)
5137 /* This is the first time we have seen this header
5138 file with this set of stabs strings. */
5139 t = bfd_hash_allocate (&finfo->includes.root,
5144 t->next = incl_entry->totals;
5145 incl_entry->totals = t;
5151 /* This is a duplicate header file. We must change
5152 it to be an N_EXCL entry, and mark all the
5153 included symbols to prevent outputting them. */
5154 type = (int) N_EXCL;
5157 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
5159 incl_sym++, incl_map++)
5163 incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
5164 if (incl_type == (int) N_EINCL)
5173 else if (incl_type == (int) N_BINCL)
5182 /* Copy this symbol into the list of symbols we are going to
5184 H_PUT_8 (output_bfd, type, outsym->e_type);
5185 H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_other), outsym->e_other);
5186 H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
5188 if (! finfo->info->keep_memory)
5190 /* name points into a string table which we are going to
5191 free. If there is a hash table entry, use that string.
5192 Otherwise, copy name into memory. */
5194 name = h->root.root.string;
5198 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
5200 if (strtab_index == (bfd_size_type) -1)
5202 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
5203 PUT_WORD (output_bfd, val, outsym->e_value);
5204 *symbol_map = obj_aout_external_sym_count (output_bfd);
5205 ++obj_aout_external_sym_count (output_bfd);
5209 /* Write out the output symbols we have just constructed. */
5210 if (outsym > finfo->output_syms)
5212 bfd_size_type outsym_size;
5214 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
5216 outsym_size = outsym - finfo->output_syms;
5217 outsym_size *= EXTERNAL_NLIST_SIZE;
5218 if (bfd_bwrite ((void *) finfo->output_syms, outsym_size, output_bfd)
5221 finfo->symoff += outsym_size;
5227 /* Link an a.out input BFD into the output file. */
5230 aout_link_input_bfd (struct aout_final_link_info *finfo, bfd *input_bfd)
5232 bfd_size_type sym_count;
5234 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
5236 /* If this is a dynamic object, it may need special handling. */
5237 if ((input_bfd->flags & DYNAMIC) != 0
5238 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
5239 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
5240 (finfo->info, input_bfd));
5242 /* Get the symbols. We probably have them already, unless
5243 finfo->info->keep_memory is FALSE. */
5244 if (! aout_get_external_symbols (input_bfd))
5247 sym_count = obj_aout_external_sym_count (input_bfd);
5249 /* Write out the symbols and get a map of the new indices. The map
5250 is placed into finfo->symbol_map. */
5251 if (! aout_link_write_symbols (finfo, input_bfd))
5254 /* Relocate and write out the sections. These functions use the
5255 symbol map created by aout_link_write_symbols. The linker_mark
5256 field will be set if these sections are to be included in the
5257 link, which will normally be the case. */
5258 if (obj_textsec (input_bfd)->linker_mark)
5260 if (! aout_link_input_section (finfo, input_bfd,
5261 obj_textsec (input_bfd),
5263 exec_hdr (input_bfd)->a_trsize))
5266 if (obj_datasec (input_bfd)->linker_mark)
5268 if (! aout_link_input_section (finfo, input_bfd,
5269 obj_datasec (input_bfd),
5271 exec_hdr (input_bfd)->a_drsize))
5275 /* If we are not keeping memory, we don't need the symbols any
5276 longer. We still need them if we are keeping memory, because the
5277 strings in the hash table point into them. */
5278 if (! finfo->info->keep_memory)
5280 if (! aout_link_free_symbols (input_bfd))
5287 /* Do the final link step. This is called on the output BFD. The
5288 INFO structure should point to a list of BFDs linked through the
5289 link_next field which can be used to find each BFD which takes part
5290 in the output. Also, each section in ABFD should point to a list
5291 of bfd_link_order structures which list all the input sections for
5292 the output section. */
5295 NAME (aout, final_link) (bfd *abfd,
5296 struct bfd_link_info *info,
5297 void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
5299 struct aout_final_link_info aout_info;
5300 bfd_boolean includes_hash_initialized = FALSE;
5302 bfd_size_type trsize, drsize;
5303 bfd_size_type max_contents_size;
5304 bfd_size_type max_relocs_size;
5305 bfd_size_type max_sym_count;
5306 bfd_size_type text_size;
5308 struct bfd_link_order *p;
5310 bfd_boolean have_link_order_relocs;
5313 abfd->flags |= DYNAMIC;
5315 aout_info.info = info;
5316 aout_info.output_bfd = abfd;
5317 aout_info.contents = NULL;
5318 aout_info.relocs = NULL;
5319 aout_info.symbol_map = NULL;
5320 aout_info.output_syms = NULL;
5322 if (!bfd_hash_table_init_n (&aout_info.includes.root,
5323 aout_link_includes_newfunc,
5324 sizeof (struct aout_link_includes_entry),
5327 includes_hash_initialized = TRUE;
5329 /* Figure out the largest section size. Also, if generating
5330 relocatable output, count the relocs. */
5333 max_contents_size = 0;
5334 max_relocs_size = 0;
5336 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5340 if (info->relocatable)
5342 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5344 trsize += exec_hdr (sub)->a_trsize;
5345 drsize += exec_hdr (sub)->a_drsize;
5349 /* FIXME: We need to identify the .text and .data sections
5350 and call get_reloc_upper_bound and canonicalize_reloc to
5351 work out the number of relocs needed, and then multiply
5352 by the reloc size. */
5353 (*_bfd_error_handler)
5354 (_("%s: relocatable link from %s to %s not supported"),
5355 bfd_get_filename (abfd),
5356 sub->xvec->name, abfd->xvec->name);
5357 bfd_set_error (bfd_error_invalid_operation);
5362 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
5364 sz = obj_textsec (sub)->size;
5365 if (sz > max_contents_size)
5366 max_contents_size = sz;
5367 sz = obj_datasec (sub)->size;
5368 if (sz > max_contents_size)
5369 max_contents_size = sz;
5371 sz = exec_hdr (sub)->a_trsize;
5372 if (sz > max_relocs_size)
5373 max_relocs_size = sz;
5374 sz = exec_hdr (sub)->a_drsize;
5375 if (sz > max_relocs_size)
5376 max_relocs_size = sz;
5378 sz = obj_aout_external_sym_count (sub);
5379 if (sz > max_sym_count)
5384 if (info->relocatable)
5386 if (obj_textsec (abfd) != NULL)
5387 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
5388 ->map_head.link_order)
5389 * obj_reloc_entry_size (abfd));
5390 if (obj_datasec (abfd) != NULL)
5391 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
5392 ->map_head.link_order)
5393 * obj_reloc_entry_size (abfd));
5396 exec_hdr (abfd)->a_trsize = trsize;
5397 exec_hdr (abfd)->a_drsize = drsize;
5399 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
5401 /* Adjust the section sizes and vmas according to the magic number.
5402 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5403 filepos for each section. */
5404 if (! NAME (aout, adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
5407 /* The relocation and symbol file positions differ among a.out
5408 targets. We are passed a callback routine from the backend
5409 specific code to handle this.
5410 FIXME: At this point we do not know how much space the symbol
5411 table will require. This will not work for any (nonstandard)
5412 a.out target that needs to know the symbol table size before it
5413 can compute the relocation file positions. This may or may not
5414 be the case for the hp300hpux target, for example. */
5415 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
5417 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
5418 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
5419 obj_sym_filepos (abfd) = aout_info.symoff;
5421 /* We keep a count of the symbols as we output them. */
5422 obj_aout_external_sym_count (abfd) = 0;
5424 /* We accumulate the string table as we write out the symbols. */
5425 aout_info.strtab = _bfd_stringtab_init ();
5426 if (aout_info.strtab == NULL)
5429 /* Allocate buffers to hold section contents and relocs. */
5430 aout_info.contents = bfd_malloc (max_contents_size);
5431 aout_info.relocs = bfd_malloc (max_relocs_size);
5432 aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *));
5433 aout_info.output_syms = bfd_malloc ((max_sym_count + 1)
5434 * sizeof (struct external_nlist));
5435 if ((aout_info.contents == NULL && max_contents_size != 0)
5436 || (aout_info.relocs == NULL && max_relocs_size != 0)
5437 || (aout_info.symbol_map == NULL && max_sym_count != 0)
5438 || aout_info.output_syms == NULL)
5441 /* If we have a symbol named __DYNAMIC, force it out now. This is
5442 required by SunOS. Doing this here rather than in sunos.c is a
5443 hack, but it's easier than exporting everything which would be
5446 struct aout_link_hash_entry *h;
5448 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
5449 FALSE, FALSE, FALSE);
5451 aout_link_write_other_symbol (h, &aout_info);
5454 /* The most time efficient way to do the link would be to read all
5455 the input object files into memory and then sort out the
5456 information into the output file. Unfortunately, that will
5457 probably use too much memory. Another method would be to step
5458 through everything that composes the text section and write it
5459 out, and then everything that composes the data section and write
5460 it out, and then write out the relocs, and then write out the
5461 symbols. Unfortunately, that requires reading stuff from each
5462 input file several times, and we will not be able to keep all the
5463 input files open simultaneously, and reopening them will be slow.
5465 What we do is basically process one input file at a time. We do
5466 everything we need to do with an input file once--copy over the
5467 section contents, handle the relocation information, and write
5468 out the symbols--and then we throw away the information we read
5469 from it. This approach requires a lot of lseeks of the output
5470 file, which is unfortunate but still faster than reopening a lot
5473 We use the output_has_begun field of the input BFDs to see
5474 whether we have already handled it. */
5475 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
5476 sub->output_has_begun = FALSE;
5478 /* Mark all sections which are to be included in the link. This
5479 will normally be every section. We need to do this so that we
5480 can identify any sections which the linker has decided to not
5482 for (o = abfd->sections; o != NULL; o = o->next)
5484 for (p = o->map_head.link_order; p != NULL; p = p->next)
5485 if (p->type == bfd_indirect_link_order)
5486 p->u.indirect.section->linker_mark = TRUE;
5489 have_link_order_relocs = FALSE;
5490 for (o = abfd->sections; o != NULL; o = o->next)
5492 for (p = o->map_head.link_order;
5496 if (p->type == bfd_indirect_link_order
5497 && (bfd_get_flavour (p->u.indirect.section->owner)
5498 == bfd_target_aout_flavour))
5502 input_bfd = p->u.indirect.section->owner;
5503 if (! input_bfd->output_has_begun)
5505 if (! aout_link_input_bfd (&aout_info, input_bfd))
5507 input_bfd->output_has_begun = TRUE;
5510 else if (p->type == bfd_section_reloc_link_order
5511 || p->type == bfd_symbol_reloc_link_order)
5513 /* These are handled below. */
5514 have_link_order_relocs = TRUE;
5518 if (! _bfd_default_link_order (abfd, info, o, p))
5524 /* Write out any symbols that we have not already written out. */
5525 aout_link_hash_traverse (aout_hash_table (info),
5526 aout_link_write_other_symbol,
5527 (void *) &aout_info);
5529 /* Now handle any relocs we were asked to create by the linker.
5530 These did not come from any input file. We must do these after
5531 we have written out all the symbols, so that we know the symbol
5533 if (have_link_order_relocs)
5535 for (o = abfd->sections; o != NULL; o = o->next)
5537 for (p = o->map_head.link_order;
5541 if (p->type == bfd_section_reloc_link_order
5542 || p->type == bfd_symbol_reloc_link_order)
5544 if (! aout_link_reloc_link_order (&aout_info, o, p))
5551 if (aout_info.contents != NULL)
5553 free (aout_info.contents);
5554 aout_info.contents = NULL;
5556 if (aout_info.relocs != NULL)
5558 free (aout_info.relocs);
5559 aout_info.relocs = NULL;
5561 if (aout_info.symbol_map != NULL)
5563 free (aout_info.symbol_map);
5564 aout_info.symbol_map = NULL;
5566 if (aout_info.output_syms != NULL)
5568 free (aout_info.output_syms);
5569 aout_info.output_syms = NULL;
5571 if (includes_hash_initialized)
5573 bfd_hash_table_free (&aout_info.includes.root);
5574 includes_hash_initialized = FALSE;
5577 /* Finish up any dynamic linking we may be doing. */
5578 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
5580 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
5584 /* Update the header information. */
5585 abfd->symcount = obj_aout_external_sym_count (abfd);
5586 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
5587 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
5588 obj_textsec (abfd)->reloc_count =
5589 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
5590 obj_datasec (abfd)->reloc_count =
5591 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
5593 /* Write out the string table, unless there are no symbols. */
5594 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
5596 if (abfd->symcount > 0)
5598 if (!emit_stringtab (abfd, aout_info.strtab))
5603 bfd_byte b[BYTES_IN_WORD];
5605 memset (b, 0, BYTES_IN_WORD);
5606 if (bfd_bwrite (b, (bfd_size_type) BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
5613 if (aout_info.contents != NULL)
5614 free (aout_info.contents);
5615 if (aout_info.relocs != NULL)
5616 free (aout_info.relocs);
5617 if (aout_info.symbol_map != NULL)
5618 free (aout_info.symbol_map);
5619 if (aout_info.output_syms != NULL)
5620 free (aout_info.output_syms);
5621 if (includes_hash_initialized)
5622 bfd_hash_table_free (&aout_info.includes.root);