1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2022 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, and
37 386 a.out files, to create a target jump vector for a specific
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 and @file{demo64.c} for a demonstration of a 64 bit a.out format.
44 The base file @file{aoutx.h} defines general mechanisms for
45 reading and writing records to and from disk and various
46 other methods which BFD requires. It is included by
47 @file{aout32.c} and @file{aout64.c} to form the names
48 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
50 As an example, this is what goes on to make the back end for a
51 sun4, from @file{aout32.c}:
53 | #define ARCH_SIZE 32
59 | aout_32_canonicalize_reloc
60 | aout_32_find_nearest_line
62 | aout_32_get_reloc_upper_bound
67 | #define TARGET_NAME "a.out-sunos-big"
68 | #define VECNAME sparc_aout_sunos_be_vec
71 requires all the names from @file{aout32.c}, and produces the jump vector
73 | sparc_aout_sunos_be_vec
75 The file @file{host-aout.c} is a special case. It is for a large set
76 of hosts that use ``more or less standard'' a.out files, and
77 for which cross-debugging is not interesting. It uses the
78 standard 32-bit a.out support routines, but determines the
79 file offsets and addresses of the text, data, and BSS
80 sections, the machine architecture and machine type, and the
81 entry point address, in a host-dependent manner. Once these
82 values have been determined, generic code is used to handle
85 When porting it to run on a new system, you must supply:
89 | HOST_MACHINE_ARCH (optional)
90 | HOST_MACHINE_MACHINE (optional)
91 | HOST_TEXT_START_ADDR
94 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
95 values, plus the structures and macros defined in @file{a.out.h} on
96 your host system, will produce a BFD target that will access
97 ordinary a.out files on your host. To configure a new machine
98 to use @file{host-aout.c}, specify:
100 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
101 | TDEPFILES= host-aout.o trad-core.o
103 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
105 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
106 configuration is selected. */
109 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
110 Doesn't matter what the setting of WP_TEXT is on output, but it'll
112 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
113 * Any BFD with both flags clear is OMAGIC.
114 (Just want to make these explicit, so the conditions tested in this
115 file make sense if you're more familiar with a.out than with BFD.) */
117 #define KEEPIT udata.i
122 #include "safe-ctype.h"
127 #include "aout/aout64.h"
128 #include "aout/stab_gnu.h"
132 #define N_IS_BMAGIC(x) (N_MAGIC (x) == BMAGIC)
134 #define N_IS_BMAGIC(x) (0)
138 #define N_SET_QMAGIC(x) N_SET_MAGIC (x, QMAGIC)
140 #define N_SET_QMAGIC(x) do { /**/ } while (0)
148 The file @file{aoutx.h} provides for both the @emph{standard}
149 and @emph{extended} forms of a.out relocation records.
151 The standard records contain only an address, a symbol index,
152 and a type field. The extended records also have a full
153 integer for an addend. */
155 #ifndef CTOR_TABLE_RELOC_HOWTO
156 #define CTOR_TABLE_RELOC_IDX 2
157 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
158 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
159 ? howto_table_ext : howto_table_std) \
160 + CTOR_TABLE_RELOC_IDX)
163 #ifndef MY_swap_std_reloc_in
164 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
167 #ifndef MY_swap_ext_reloc_in
168 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
171 #ifndef MY_swap_std_reloc_out
172 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
175 #ifndef MY_swap_ext_reloc_out
176 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
179 #ifndef MY_final_link_relocate
180 #define MY_final_link_relocate _bfd_final_link_relocate
183 #ifndef MY_relocate_contents
184 #define MY_relocate_contents _bfd_relocate_contents
187 #define howto_table_ext NAME (aout, ext_howto_table)
188 #define howto_table_std NAME (aout, std_howto_table)
190 reloc_howto_type howto_table_ext
[] =
192 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
193 HOWTO (RELOC_8
, 0, 1, 8, false, 0, complain_overflow_bitfield
, 0, "8", false, 0, 0x000000ff, false),
194 HOWTO (RELOC_16
, 0, 2, 16, false, 0, complain_overflow_bitfield
, 0, "16", false, 0, 0x0000ffff, false),
195 HOWTO (RELOC_32
, 0, 4, 32, false, 0, complain_overflow_bitfield
, 0, "32", false, 0, 0xffffffff, false),
196 HOWTO (RELOC_DISP8
, 0, 1, 8, true, 0, complain_overflow_signed
, 0, "DISP8", false, 0, 0x000000ff, false),
197 HOWTO (RELOC_DISP16
, 0, 2, 16, true, 0, complain_overflow_signed
, 0, "DISP16", false, 0, 0x0000ffff, false),
198 HOWTO (RELOC_DISP32
, 0, 4, 32, true, 0, complain_overflow_signed
, 0, "DISP32", false, 0, 0xffffffff, false),
199 HOWTO (RELOC_WDISP30
, 2, 4, 30, true, 0, complain_overflow_signed
, 0, "WDISP30", false, 0, 0x3fffffff, false),
200 HOWTO (RELOC_WDISP22
, 2, 4, 22, true, 0, complain_overflow_signed
, 0, "WDISP22", false, 0, 0x003fffff, false),
201 HOWTO (RELOC_HI22
, 10, 4, 22, false, 0, complain_overflow_bitfield
, 0, "HI22", false, 0, 0x003fffff, false),
202 HOWTO (RELOC_22
, 0, 4, 22, false, 0, complain_overflow_bitfield
, 0, "22", false, 0, 0x003fffff, false),
203 HOWTO (RELOC_13
, 0, 4, 13, false, 0, complain_overflow_bitfield
, 0, "13", false, 0, 0x00001fff, false),
204 HOWTO (RELOC_LO10
, 0, 4, 10, false, 0, complain_overflow_dont
, 0, "LO10", false, 0, 0x000003ff, false),
205 HOWTO (RELOC_SFA_BASE
,0, 4, 32, false, 0, complain_overflow_bitfield
, 0, "SFA_BASE", false, 0, 0xffffffff, false),
206 HOWTO (RELOC_SFA_OFF13
,0, 4, 32, false, 0, complain_overflow_bitfield
, 0, "SFA_OFF13", false, 0, 0xffffffff, false),
207 HOWTO (RELOC_BASE10
, 0, 4, 10, false, 0, complain_overflow_dont
, 0, "BASE10", false, 0, 0x000003ff, false),
208 HOWTO (RELOC_BASE13
, 0, 4, 13, false, 0, complain_overflow_signed
, 0, "BASE13", false, 0, 0x00001fff, false),
209 HOWTO (RELOC_BASE22
, 10, 4, 22, false, 0, complain_overflow_bitfield
, 0, "BASE22", false, 0, 0x003fffff, false),
210 HOWTO (RELOC_PC10
, 0, 4, 10, true, 0, complain_overflow_dont
, 0, "PC10", false, 0, 0x000003ff, true),
211 HOWTO (RELOC_PC22
, 10, 4, 22, true, 0, complain_overflow_signed
, 0, "PC22", false, 0, 0x003fffff, true),
212 HOWTO (RELOC_JMP_TBL
, 2, 4, 30, true, 0, complain_overflow_signed
, 0, "JMP_TBL", false, 0, 0x3fffffff, false),
213 HOWTO (RELOC_SEGOFF16
,0, 4, 0, false, 0, complain_overflow_bitfield
, 0, "SEGOFF16", false, 0, 0x00000000, false),
214 HOWTO (RELOC_GLOB_DAT
,0, 4, 0, false, 0, complain_overflow_bitfield
, 0, "GLOB_DAT", false, 0, 0x00000000, false),
215 HOWTO (RELOC_JMP_SLOT
,0, 4, 0, false, 0, complain_overflow_bitfield
, 0, "JMP_SLOT", false, 0, 0x00000000, false),
216 HOWTO (RELOC_RELATIVE
,0, 4, 0, false, 0, complain_overflow_bitfield
, 0, "RELATIVE", false, 0, 0x00000000, false),
217 HOWTO (0, 0, 0, 0, false, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",false, 0, 0x00000000, true),
218 HOWTO (0, 0, 0, 0, false, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",false, 0, 0x00000000, true),
219 #define RELOC_SPARC_REV32 RELOC_WDISP19
220 HOWTO (RELOC_SPARC_REV32
, 0, 4, 32, false, 0, complain_overflow_dont
, 0,"R_SPARC_REV32",false, 0, 0xffffffff, false),
223 /* Convert standard reloc records to "arelent" format (incl byte swap). */
225 reloc_howto_type howto_table_std
[] =
227 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
228 HOWTO ( 0, 0, 1, 8, false, 0, complain_overflow_bitfield
,0,"8", true, 0x000000ff,0x000000ff, false),
229 HOWTO ( 1, 0, 2, 16, false, 0, complain_overflow_bitfield
,0,"16", true, 0x0000ffff,0x0000ffff, false),
230 HOWTO ( 2, 0, 4, 32, false, 0, complain_overflow_bitfield
,0,"32", true, 0xffffffff,0xffffffff, false),
231 HOWTO ( 3, 0, 8, 64, false, 0, complain_overflow_bitfield
,0,"64", true, 0xdeaddead,0xdeaddead, false),
232 HOWTO ( 4, 0, 1, 8, true, 0, complain_overflow_signed
, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
233 HOWTO ( 5, 0, 2, 16, true, 0, complain_overflow_signed
, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
234 HOWTO ( 6, 0, 4, 32, true, 0, complain_overflow_signed
, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
235 HOWTO ( 7, 0, 8, 64, true, 0, complain_overflow_signed
, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
236 HOWTO ( 8, 0, 4, 0, false, 0, complain_overflow_bitfield
,0,"GOT_REL", false, 0,0x00000000, false),
237 HOWTO ( 9, 0, 2, 16, false, 0, complain_overflow_bitfield
,0,"BASE16", false,0xffffffff,0xffffffff, false),
238 HOWTO (10, 0, 4, 32, false, 0, complain_overflow_bitfield
,0,"BASE32", false,0xffffffff,0xffffffff, false),
244 HOWTO (16, 0, 4, 0, false, 0, complain_overflow_bitfield
,0,"JMP_TABLE", false, 0,0x00000000, false),
260 HOWTO (32, 0, 4, 0, false, 0, complain_overflow_bitfield
,0,"RELATIVE", false, 0,0x00000000, false),
268 HOWTO (40, 0, 4, 0, false, 0, complain_overflow_bitfield
,0,"BASEREL", false, 0,0x00000000, false),
271 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
274 NAME (aout
, reloc_type_lookup
) (bfd
*abfd
, bfd_reloc_code_real_type code
)
276 #define EXT(i, j) case i: return & howto_table_ext [j]
277 #define STD(i, j) case i: return & howto_table_std [j]
278 int ext
= obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
;
280 if (code
== BFD_RELOC_CTOR
)
281 switch (bfd_arch_bits_per_address (abfd
))
294 EXT (BFD_RELOC_8
, 0);
295 EXT (BFD_RELOC_16
, 1);
296 EXT (BFD_RELOC_32
, 2);
297 EXT (BFD_RELOC_HI22
, 8);
298 EXT (BFD_RELOC_LO10
, 11);
299 EXT (BFD_RELOC_32_PCREL_S2
, 6);
300 EXT (BFD_RELOC_SPARC_WDISP22
, 7);
301 EXT (BFD_RELOC_SPARC13
, 10);
302 EXT (BFD_RELOC_SPARC_GOT10
, 14);
303 EXT (BFD_RELOC_SPARC_BASE13
, 15);
304 EXT (BFD_RELOC_SPARC_GOT13
, 15);
305 EXT (BFD_RELOC_SPARC_GOT22
, 16);
306 EXT (BFD_RELOC_SPARC_PC10
, 17);
307 EXT (BFD_RELOC_SPARC_PC22
, 18);
308 EXT (BFD_RELOC_SPARC_WPLT30
, 19);
309 EXT (BFD_RELOC_SPARC_REV32
, 26);
317 STD (BFD_RELOC_8
, 0);
318 STD (BFD_RELOC_16
, 1);
319 STD (BFD_RELOC_32
, 2);
320 STD (BFD_RELOC_8_PCREL
, 4);
321 STD (BFD_RELOC_16_PCREL
, 5);
322 STD (BFD_RELOC_32_PCREL
, 6);
323 STD (BFD_RELOC_16_BASEREL
, 9);
324 STD (BFD_RELOC_32_BASEREL
, 10);
331 NAME (aout
, reloc_name_lookup
) (bfd
*abfd
, const char *r_name
)
333 unsigned int i
, size
;
334 reloc_howto_type
*howto_table
;
336 if (obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
)
338 howto_table
= howto_table_ext
;
339 size
= sizeof (howto_table_ext
) / sizeof (howto_table_ext
[0]);
343 howto_table
= howto_table_std
;
344 size
= sizeof (howto_table_std
) / sizeof (howto_table_std
[0]);
347 for (i
= 0; i
< size
; i
++)
348 if (howto_table
[i
].name
!= NULL
349 && strcasecmp (howto_table
[i
].name
, r_name
) == 0)
350 return &howto_table
[i
];
357 Internal entry points
360 @file{aoutx.h} exports several routines for accessing the
361 contents of an a.out file, which are gathered and exported in
362 turn by various format specific files (eg sunos.c).
367 aout_@var{size}_swap_exec_header_in
370 void aout_@var{size}_swap_exec_header_in,
372 struct external_exec *bytes,
373 struct internal_exec *execp);
376 Swap the information in an executable header @var{raw_bytes} taken
377 from a raw byte stream memory image into the internal exec header
378 structure @var{execp}.
381 #ifndef NAME_swap_exec_header_in
383 NAME (aout
, swap_exec_header_in
) (bfd
*abfd
,
384 struct external_exec
*bytes
,
385 struct internal_exec
*execp
)
387 /* The internal_exec structure has some fields that are unused in this
388 configuration (IE for i960), so ensure that all such uninitialized
389 fields are zero'd out. There are places where two of these structs
390 are memcmp'd, and thus the contents do matter. */
391 memset ((void *) execp
, 0, sizeof (struct internal_exec
));
392 /* Now fill in fields in the execp, from the bytes in the raw data. */
393 execp
->a_info
= H_GET_32 (abfd
, bytes
->e_info
);
394 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
395 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
396 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
397 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
398 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
399 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
400 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
402 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
407 aout_@var{size}_swap_exec_header_out
410 void aout_@var{size}_swap_exec_header_out
412 struct internal_exec *execp,
413 struct external_exec *raw_bytes);
416 Swap the information in an internal exec header structure
417 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
420 NAME (aout
, swap_exec_header_out
) (bfd
*abfd
,
421 struct internal_exec
*execp
,
422 struct external_exec
*bytes
)
424 /* Now fill in fields in the raw data, from the fields in the exec struct. */
425 H_PUT_32 (abfd
, execp
->a_info
, bytes
->e_info
);
426 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
427 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
428 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
429 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
430 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
431 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
432 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
435 /* Make all the section for an a.out file. */
438 NAME (aout
, make_sections
) (bfd
*abfd
)
440 if (obj_textsec (abfd
) == NULL
&& bfd_make_section (abfd
, ".text") == NULL
)
442 if (obj_datasec (abfd
) == NULL
&& bfd_make_section (abfd
, ".data") == NULL
)
444 if (obj_bsssec (abfd
) == NULL
&& bfd_make_section (abfd
, ".bss") == NULL
)
451 aout_@var{size}_some_aout_object_p
454 const bfd_target *aout_@var{size}_some_aout_object_p
456 struct internal_exec *execp,
457 const bfd_target *(*callback_to_real_object_p) (bfd *));
460 Some a.out variant thinks that the file open in @var{abfd}
461 checking is an a.out file. Do some more checking, and set up
462 for access if it really is. Call back to the calling
463 environment's "finish up" function just before returning, to
464 handle any last-minute setup.
468 NAME (aout
, some_aout_object_p
) (bfd
*abfd
,
469 struct internal_exec
*execp
,
470 bfd_cleanup (*callback_to_real_object_p
) (bfd
*))
472 struct aout_data_struct
*rawptr
, *oldrawptr
;
474 size_t amt
= sizeof (* rawptr
);
476 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
480 oldrawptr
= abfd
->tdata
.aout_data
;
481 abfd
->tdata
.aout_data
= rawptr
;
483 /* Copy the contents of the old tdata struct. */
484 if (oldrawptr
!= NULL
)
485 *abfd
->tdata
.aout_data
= *oldrawptr
;
487 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
488 /* Copy in the internal_exec struct. */
489 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
;
490 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
492 /* Set the file flags. */
493 abfd
->flags
= BFD_NO_FLAGS
;
494 if (execp
->a_drsize
|| execp
->a_trsize
)
495 abfd
->flags
|= HAS_RELOC
;
496 /* Setting of EXEC_P has been deferred to the bottom of this function. */
498 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
499 if (N_DYNAMIC (execp
))
500 abfd
->flags
|= DYNAMIC
;
502 if (N_MAGIC (execp
) == ZMAGIC
)
504 abfd
->flags
|= D_PAGED
| WP_TEXT
;
505 adata (abfd
).magic
= z_magic
;
507 else if (N_IS_QMAGIC (execp
))
509 abfd
->flags
|= D_PAGED
| WP_TEXT
;
510 adata (abfd
).magic
= z_magic
;
511 adata (abfd
).subformat
= q_magic_format
;
513 else if (N_MAGIC (execp
) == NMAGIC
)
515 abfd
->flags
|= WP_TEXT
;
516 adata (abfd
).magic
= n_magic
;
518 else if (N_MAGIC (execp
) == OMAGIC
|| N_IS_BMAGIC (execp
))
519 adata (abfd
).magic
= o_magic
;
521 /* Should have been checked with N_BADMAG before this routine
525 abfd
->start_address
= execp
->a_entry
;
527 obj_aout_symbols (abfd
) = NULL
;
528 abfd
->symcount
= execp
->a_syms
/ sizeof (struct external_nlist
);
530 /* The default relocation entry size is that of traditional V7 Unix. */
531 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
533 /* The default symbol entry size is that of traditional Unix. */
534 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
537 bfd_init_window (&obj_aout_sym_window (abfd
));
538 bfd_init_window (&obj_aout_string_window (abfd
));
540 obj_aout_external_syms (abfd
) = NULL
;
541 obj_aout_external_strings (abfd
) = NULL
;
542 obj_aout_sym_hashes (abfd
) = NULL
;
544 if (! NAME (aout
, make_sections
) (abfd
))
547 obj_datasec (abfd
)->size
= execp
->a_data
;
548 obj_bsssec (abfd
)->size
= execp
->a_bss
;
550 obj_textsec (abfd
)->flags
=
551 (execp
->a_trsize
!= 0
552 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
553 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
554 obj_datasec (abfd
)->flags
=
555 (execp
->a_drsize
!= 0
556 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
557 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
558 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
560 #ifdef THIS_IS_ONLY_DOCUMENTATION
561 /* The common code can't fill in these things because they depend
562 on either the start address of the text segment, the rounding
563 up of virtual addresses between segments, or the starting file
564 position of the text segment -- all of which varies among different
565 versions of a.out. */
567 /* Call back to the format-dependent code to fill in the rest of the
568 fields and do any further cleanup. Things that should be filled
569 in by the callback: */
571 struct exec
*execp
= exec_hdr (abfd
);
573 obj_textsec (abfd
)->size
= N_TXTSIZE (execp
);
574 /* Data and bss are already filled in since they're so standard. */
576 /* The virtual memory addresses of the sections. */
577 obj_textsec (abfd
)->vma
= N_TXTADDR (execp
);
578 obj_datasec (abfd
)->vma
= N_DATADDR (execp
);
579 obj_bsssec (abfd
)->vma
= N_BSSADDR (execp
);
581 /* The file offsets of the sections. */
582 obj_textsec (abfd
)->filepos
= N_TXTOFF (execp
);
583 obj_datasec (abfd
)->filepos
= N_DATOFF (execp
);
585 /* The file offsets of the relocation info. */
586 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF (execp
);
587 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF (execp
);
589 /* The file offsets of the string table and symbol table. */
590 obj_str_filepos (abfd
) = N_STROFF (execp
);
591 obj_sym_filepos (abfd
) = N_SYMOFF (execp
);
593 /* Determine the architecture and machine type of the object file. */
594 switch (N_MACHTYPE (exec_hdr (abfd
)))
597 abfd
->obj_arch
= bfd_arch_obscure
;
601 adata (abfd
)->page_size
= TARGET_PAGE_SIZE
;
602 adata (abfd
)->segment_size
= SEGMENT_SIZE
;
603 adata (abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
605 return _bfd_no_cleanup
607 /* The architecture is encoded in various ways in various a.out variants,
608 or is not encoded at all in some of them. The relocation size depends
609 on the architecture and the a.out variant. Finally, the return value
610 is the bfd_target vector in use. If an error occurs, return zero and
611 set bfd_error to the appropriate error code.
613 Formats such as b.out, which have additional fields in the a.out
614 header, should cope with them in this callback as well. */
615 #endif /* DOCUMENTATION */
617 result
= (*callback_to_real_object_p
) (abfd
);
619 /* Now that the segment addresses have been worked out, take a better
620 guess at whether the file is executable. If the entry point
621 is within the text segment, assume it is. (This makes files
622 executable even if their entry point address is 0, as long as
623 their text starts at zero.).
625 This test had to be changed to deal with systems where the text segment
626 runs at a different location than the default. The problem is that the
627 entry address can appear to be outside the text segment, thus causing an
628 erroneous conclusion that the file isn't executable.
630 To fix this, we now accept any non-zero entry point as an indication of
631 executability. This will work most of the time, since only the linker
632 sets the entry point, and that is likely to be non-zero for most systems. */
634 if (execp
->a_entry
!= 0
635 || (execp
->a_entry
>= obj_textsec (abfd
)->vma
636 && execp
->a_entry
< (obj_textsec (abfd
)->vma
637 + obj_textsec (abfd
)->size
)
638 && execp
->a_trsize
== 0
639 && execp
->a_drsize
== 0))
640 abfd
->flags
|= EXEC_P
;
644 struct stat stat_buf
;
646 /* The original heuristic doesn't work in some important cases.
647 The a.out file has no information about the text start
648 address. For files (like kernels) linked to non-standard
649 addresses (ld -Ttext nnn) the entry point may not be between
650 the default text start (obj_textsec(abfd)->vma) and
651 (obj_textsec(abfd)->vma) + text size. This is not just a mach
652 issue. Many kernels are loaded at non standard addresses. */
653 if (abfd
->iostream
!= NULL
654 && (abfd
->flags
& BFD_IN_MEMORY
) == 0
655 && (fstat (fileno ((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
656 && ((stat_buf
.st_mode
& 0111) != 0))
657 abfd
->flags
|= EXEC_P
;
659 #endif /* STAT_FOR_EXEC */
665 bfd_release (abfd
, rawptr
);
666 abfd
->tdata
.aout_data
= oldrawptr
;
672 aout_@var{size}_mkobject
675 bool aout_@var{size}_mkobject, (bfd *abfd);
678 Initialize BFD @var{abfd} for use with a.out files.
682 NAME (aout
, mkobject
) (bfd
*abfd
)
684 struct aout_data_struct
*rawptr
;
685 size_t amt
= sizeof (* rawptr
);
687 bfd_set_error (bfd_error_system_call
);
689 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
693 abfd
->tdata
.aout_data
= rawptr
;
694 exec_hdr (abfd
) = &(rawptr
->e
);
696 obj_textsec (abfd
) = NULL
;
697 obj_datasec (abfd
) = NULL
;
698 obj_bsssec (abfd
) = NULL
;
705 aout_@var{size}_machine_type
708 enum machine_type aout_@var{size}_machine_type
709 (enum bfd_architecture arch,
710 unsigned long machine,
714 Keep track of machine architecture and machine type for
715 a.out's. Return the <<machine_type>> for a particular
716 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
717 and machine can't be represented in a.out format.
719 If the architecture is understood, machine type 0 (default)
720 is always understood.
724 NAME (aout
, machine_type
) (enum bfd_architecture arch
,
725 unsigned long machine
,
728 enum machine_type arch_flags
;
730 arch_flags
= M_UNKNOWN
;
737 || machine
== bfd_mach_sparc
738 || machine
== bfd_mach_sparc_sparclite
739 || machine
== bfd_mach_sparc_sparclite_le
740 || machine
== bfd_mach_sparc_v8plus
741 || machine
== bfd_mach_sparc_v8plusa
742 || machine
== bfd_mach_sparc_v8plusb
743 || machine
== bfd_mach_sparc_v8plusc
744 || machine
== bfd_mach_sparc_v8plusd
745 || machine
== bfd_mach_sparc_v8pluse
746 || machine
== bfd_mach_sparc_v8plusv
747 || machine
== bfd_mach_sparc_v8plusm
748 || machine
== bfd_mach_sparc_v8plusm8
749 || machine
== bfd_mach_sparc_v9
750 || machine
== bfd_mach_sparc_v9a
751 || machine
== bfd_mach_sparc_v9b
752 || machine
== bfd_mach_sparc_v9c
753 || machine
== bfd_mach_sparc_v9d
754 || machine
== bfd_mach_sparc_v9e
755 || machine
== bfd_mach_sparc_v9v
756 || machine
== bfd_mach_sparc_v9m
757 || machine
== bfd_mach_sparc_v9m8
)
758 arch_flags
= M_SPARC
;
759 else if (machine
== bfd_mach_sparc_sparclet
)
760 arch_flags
= M_SPARCLET
;
765 || machine
== bfd_mach_i386_i386
766 || machine
== bfd_mach_i386_i386_intel_syntax
)
779 case bfd_mach_mips3000
:
780 case bfd_mach_mips3900
:
781 arch_flags
= M_MIPS1
;
783 case bfd_mach_mips6000
:
784 arch_flags
= M_MIPS2
;
786 case bfd_mach_mips4000
:
787 case bfd_mach_mips4010
:
788 case bfd_mach_mips4100
:
789 case bfd_mach_mips4300
:
790 case bfd_mach_mips4400
:
791 case bfd_mach_mips4600
:
792 case bfd_mach_mips4650
:
793 case bfd_mach_mips8000
:
794 case bfd_mach_mips9000
:
795 case bfd_mach_mips10000
:
796 case bfd_mach_mips12000
:
797 case bfd_mach_mips14000
:
798 case bfd_mach_mips16000
:
799 case bfd_mach_mips16
:
800 case bfd_mach_mipsisa32
:
801 case bfd_mach_mipsisa32r2
:
802 case bfd_mach_mipsisa32r3
:
803 case bfd_mach_mipsisa32r5
:
804 case bfd_mach_mipsisa32r6
:
806 case bfd_mach_mipsisa64
:
807 case bfd_mach_mipsisa64r2
:
808 case bfd_mach_mipsisa64r3
:
809 case bfd_mach_mipsisa64r5
:
810 case bfd_mach_mipsisa64r6
:
811 case bfd_mach_mips_sb1
:
812 case bfd_mach_mips_xlr
:
813 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
814 arch_flags
= M_MIPS2
;
817 arch_flags
= M_UNKNOWN
;
825 case 0: arch_flags
= M_NS32532
; break;
826 case 32032: arch_flags
= M_NS32032
; break;
827 case 32532: arch_flags
= M_NS32532
; break;
828 default: arch_flags
= M_UNKNOWN
; break;
837 if (machine
== 0 || machine
== 255)
842 arch_flags
= M_UNKNOWN
;
845 if (arch_flags
!= M_UNKNOWN
)
853 aout_@var{size}_set_arch_mach
856 bool aout_@var{size}_set_arch_mach,
858 enum bfd_architecture arch,
859 unsigned long machine);
862 Set the architecture and the machine of the BFD @var{abfd} to the
863 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
864 can support the architecture required.
868 NAME (aout
, set_arch_mach
) (bfd
*abfd
,
869 enum bfd_architecture arch
,
870 unsigned long machine
)
872 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
875 if (arch
!= bfd_arch_unknown
)
879 NAME (aout
, machine_type
) (arch
, machine
, &unknown
);
884 /* Determine the size of a relocation entry. */
889 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
892 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
896 return (*aout_backend_info (abfd
)->set_sizes
) (abfd
);
900 adjust_o_magic (bfd
*abfd
, struct internal_exec
*execp
)
902 file_ptr pos
= adata (abfd
).exec_bytes_size
;
905 asection
*text
= obj_textsec (abfd
);
906 asection
*data
= obj_datasec (abfd
);
907 asection
*bss
= obj_bsssec (abfd
);
911 if (!text
->user_set_vma
)
916 pos
+= execp
->a_text
;
917 vma
+= execp
->a_text
;
920 if (!data
->user_set_vma
)
928 execp
->a_text
+= pad
;
935 if (!bss
->user_set_vma
)
943 /* The VMA of the .bss section is set by the VMA of the
944 .data section plus the size of the .data section. We may
945 need to add padding bytes to make this true. */
946 pad
= bss
->vma
- vma
;
951 execp
->a_data
= data
->size
+ pad
;
953 execp
->a_bss
= bss
->size
;
955 N_SET_MAGIC (execp
, OMAGIC
);
959 adjust_z_magic (bfd
*abfd
, struct internal_exec
*execp
)
961 bfd_size_type data_pad
, text_pad
;
963 const struct aout_backend_data
*abdp
;
964 /* TRUE if text includes exec header. */
966 asection
*text
= obj_textsec (abfd
);
967 asection
*data
= obj_datasec (abfd
);
968 asection
*bss
= obj_bsssec (abfd
);
970 abdp
= aout_backend_info (abfd
);
974 && (abdp
->text_includes_header
975 || obj_aout_subformat (abfd
) == q_magic_format
));
976 text
->filepos
= (ztih
977 ? adata (abfd
).exec_bytes_size
978 : adata (abfd
).zmagic_disk_block_size
);
979 if (!text
->user_set_vma
)
981 /* ?? Do we really need to check for relocs here? */
982 text
->vma
= ((abfd
->flags
& HAS_RELOC
)
985 ? abdp
->default_text_vma
+ adata (abfd
).exec_bytes_size
986 : abdp
->default_text_vma
));
991 /* The .text section is being loaded at an unusual address. We
992 may need to pad it such that the .data section starts at a page
995 text_pad
= ((text
->filepos
- text
->vma
)
996 & (adata (abfd
).page_size
- 1));
998 text_pad
= (-text
->vma
999 & (adata (abfd
).page_size
- 1));
1002 /* Find start of data. */
1005 text_end
= text
->filepos
+ execp
->a_text
;
1006 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1010 /* Note that if page_size == zmagic_disk_block_size, then
1011 filepos == page_size, and this case is the same as the ztih
1013 text_end
= execp
->a_text
;
1014 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1015 text_end
+= text
->filepos
;
1017 execp
->a_text
+= text_pad
;
1020 if (!data
->user_set_vma
)
1023 vma
= text
->vma
+ execp
->a_text
;
1024 data
->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1026 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
1028 text_pad
= data
->vma
- (text
->vma
+ execp
->a_text
);
1029 /* Only pad the text section if the data
1030 section is going to be placed after it. */
1032 execp
->a_text
+= text_pad
;
1034 data
->filepos
= text
->filepos
+ execp
->a_text
;
1036 /* Fix up exec header while we're at it. */
1037 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
1038 execp
->a_text
+= adata (abfd
).exec_bytes_size
;
1039 if (obj_aout_subformat (abfd
) == q_magic_format
)
1040 N_SET_QMAGIC (execp
);
1042 N_SET_MAGIC (execp
, ZMAGIC
);
1044 /* Spec says data section should be rounded up to page boundary. */
1045 execp
->a_data
= align_power (data
->size
, bss
->alignment_power
);
1046 execp
->a_data
= BFD_ALIGN (execp
->a_data
, adata (abfd
).page_size
);
1047 data_pad
= execp
->a_data
- data
->size
;
1050 if (!bss
->user_set_vma
)
1051 bss
->vma
= data
->vma
+ execp
->a_data
;
1052 /* If the BSS immediately follows the data section and extra space
1053 in the page is left after the data section, fudge data
1054 in the header so that the bss section looks smaller by that
1055 amount. We'll start the bss section there, and lie to the OS.
1056 (Note that a linker script, as well as the above assignment,
1057 could have explicitly set the BSS vma to immediately follow
1058 the data section.) */
1059 if (align_power (bss
->vma
, bss
->alignment_power
) == data
->vma
+ execp
->a_data
)
1060 execp
->a_bss
= data_pad
> bss
->size
? 0 : bss
->size
- data_pad
;
1062 execp
->a_bss
= bss
->size
;
1066 adjust_n_magic (bfd
*abfd
, struct internal_exec
*execp
)
1068 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1071 asection
*text
= obj_textsec (abfd
);
1072 asection
*data
= obj_datasec (abfd
);
1073 asection
*bss
= obj_bsssec (abfd
);
1076 text
->filepos
= pos
;
1077 if (!text
->user_set_vma
)
1081 pos
+= execp
->a_text
;
1082 vma
+= execp
->a_text
;
1085 data
->filepos
= pos
;
1086 if (!data
->user_set_vma
)
1087 data
->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1090 /* Since BSS follows data immediately, see if it needs alignment. */
1092 pad
= align_power (vma
, bss
->alignment_power
) - vma
;
1093 execp
->a_data
= data
->size
+ pad
;
1094 pos
+= execp
->a_data
;
1097 if (!bss
->user_set_vma
)
1102 /* Fix up exec header. */
1103 execp
->a_bss
= bss
->size
;
1104 N_SET_MAGIC (execp
, NMAGIC
);
1108 NAME (aout
, adjust_sizes_and_vmas
) (bfd
*abfd
)
1110 struct internal_exec
*execp
= exec_hdr (abfd
);
1112 if (! NAME (aout
, make_sections
) (abfd
))
1115 if (adata (abfd
).magic
!= undecided_magic
)
1118 execp
->a_text
= align_power (obj_textsec (abfd
)->size
,
1119 obj_textsec (abfd
)->alignment_power
);
1121 /* Rule (heuristic) for when to pad to a new page. Note that there
1122 are (at least) two ways demand-paged (ZMAGIC) files have been
1123 handled. Most Berkeley-based systems start the text segment at
1124 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1125 segment right after the exec header; the latter is counted in the
1126 text segment size, and is paged in by the kernel with the rest of
1129 /* This perhaps isn't the right way to do this, but made it simpler for me
1130 to understand enough to implement it. Better would probably be to go
1131 right from BFD flags to alignment/positioning characteristics. But the
1132 old code was sloppy enough about handling the flags, and had enough
1133 other magic, that it was a little hard for me to understand. I think
1134 I understand it better now, but I haven't time to do the cleanup this
1137 if (abfd
->flags
& D_PAGED
)
1138 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1139 adata (abfd
).magic
= z_magic
;
1140 else if (abfd
->flags
& WP_TEXT
)
1141 adata (abfd
).magic
= n_magic
;
1143 adata (abfd
).magic
= o_magic
;
1145 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1147 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1149 switch (adata (abfd
).magic
)
1151 case n_magic
: str
= "NMAGIC"; break;
1152 case o_magic
: str
= "OMAGIC"; break;
1153 case z_magic
: str
= "ZMAGIC"; break;
1158 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1159 obj_textsec (abfd
)->alignment_power
,
1160 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1161 obj_datasec (abfd
)->alignment_power
,
1162 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
,
1163 obj_bsssec (abfd
)->alignment_power
);
1167 switch (adata (abfd
).magic
)
1170 adjust_o_magic (abfd
, execp
);
1173 adjust_z_magic (abfd
, execp
);
1176 adjust_n_magic (abfd
, execp
);
1182 #ifdef BFD_AOUT_DEBUG
1183 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1184 obj_textsec (abfd
)->vma
, execp
->a_text
,
1185 obj_textsec (abfd
)->filepos
,
1186 obj_datasec (abfd
)->vma
, execp
->a_data
,
1187 obj_datasec (abfd
)->filepos
,
1188 obj_bsssec (abfd
)->vma
, execp
->a_bss
);
1196 aout_@var{size}_new_section_hook
1199 bool aout_@var{size}_new_section_hook,
1204 Called by the BFD in response to a @code{bfd_make_section}
1208 NAME (aout
, new_section_hook
) (bfd
*abfd
, asection
*newsect
)
1210 /* Align to double at least. */
1211 newsect
->alignment_power
= bfd_get_arch_info (abfd
)->section_align_power
;
1213 if (bfd_get_format (abfd
) == bfd_object
)
1215 if (obj_textsec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".text"))
1217 obj_textsec (abfd
)= newsect
;
1218 newsect
->target_index
= N_TEXT
;
1220 else if (obj_datasec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".data"))
1222 obj_datasec (abfd
) = newsect
;
1223 newsect
->target_index
= N_DATA
;
1225 else if (obj_bsssec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".bss"))
1227 obj_bsssec (abfd
) = newsect
;
1228 newsect
->target_index
= N_BSS
;
1232 /* We allow more than three sections internally. */
1233 return _bfd_generic_new_section_hook (abfd
, newsect
);
1237 NAME (aout
, set_section_contents
) (bfd
*abfd
,
1239 const void * location
,
1241 bfd_size_type count
)
1243 if (! abfd
->output_has_begun
)
1245 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
1249 if (section
== obj_bsssec (abfd
))
1251 bfd_set_error (bfd_error_no_contents
);
1255 if (section
!= obj_textsec (abfd
)
1256 && section
!= obj_datasec (abfd
))
1258 if (aout_section_merge_with_text_p (abfd
, section
))
1259 section
->filepos
= obj_textsec (abfd
)->filepos
+
1260 (section
->vma
- obj_textsec (abfd
)->vma
);
1264 /* xgettext:c-format */
1265 (_("%pB: can not represent section `%pA' in a.out object file format"),
1267 bfd_set_error (bfd_error_nonrepresentable_section
);
1274 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1275 || bfd_bwrite (location
, count
, abfd
) != count
)
1282 /* Read the external symbols from an a.out file. */
1285 aout_get_external_symbols (bfd
*abfd
)
1287 if (obj_aout_external_syms (abfd
) == NULL
)
1289 bfd_size_type count
;
1290 struct external_nlist
*syms
;
1291 bfd_size_type amt
= exec_hdr (abfd
)->a_syms
;
1293 count
= amt
/ EXTERNAL_NLIST_SIZE
;
1295 return true; /* Nothing to do. */
1298 if (! bfd_get_file_window (abfd
, obj_sym_filepos (abfd
), amt
,
1299 &obj_aout_sym_window (abfd
), true))
1301 syms
= (struct external_nlist
*) obj_aout_sym_window (abfd
).data
;
1303 /* We allocate using malloc to make the values easy to free
1304 later on. If we put them on the objalloc it might not be
1305 possible to free them. */
1306 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0)
1308 syms
= (struct external_nlist
*) _bfd_malloc_and_read (abfd
, amt
, amt
);
1313 obj_aout_external_syms (abfd
) = syms
;
1314 obj_aout_external_sym_count (abfd
) = count
;
1317 if (obj_aout_external_strings (abfd
) == NULL
1318 && exec_hdr (abfd
)->a_syms
!= 0)
1320 unsigned char string_chars
[BYTES_IN_WORD
];
1321 bfd_size_type stringsize
;
1323 bfd_size_type amt
= BYTES_IN_WORD
;
1325 /* Get the size of the strings. */
1326 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1327 || bfd_bread ((void *) string_chars
, amt
, abfd
) != amt
)
1329 stringsize
= GET_WORD (abfd
, string_chars
);
1330 if (stringsize
== 0)
1332 else if (stringsize
< BYTES_IN_WORD
1333 || (size_t) stringsize
!= stringsize
)
1335 bfd_set_error (bfd_error_bad_value
);
1340 if (stringsize
>= BYTES_IN_WORD
)
1342 if (! bfd_get_file_window (abfd
, obj_str_filepos (abfd
), stringsize
+ 1,
1343 &obj_aout_string_window (abfd
), true))
1345 strings
= (char *) obj_aout_string_window (abfd
).data
;
1350 strings
= (char *) bfd_malloc (stringsize
+ 1);
1351 if (strings
== NULL
)
1354 if (stringsize
>= BYTES_IN_WORD
)
1356 amt
= stringsize
- BYTES_IN_WORD
;
1357 if (bfd_bread (strings
+ BYTES_IN_WORD
, amt
, abfd
) != amt
)
1364 /* Ensure that a zero index yields an empty string. */
1365 if (stringsize
>= BYTES_IN_WORD
)
1366 memset (strings
, 0, BYTES_IN_WORD
);
1368 /* Ensure that the string buffer is NUL terminated. */
1369 strings
[stringsize
] = 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_asymbol_section (cache_ptr
);
1572 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1575 /* xgettext:c-format */
1576 (_("%pB: can not represent section for symbol `%s' in a.out "
1577 "object file format"),
1579 cache_ptr
->name
!= NULL
? cache_ptr
->name
: _("*unknown*"));
1580 bfd_set_error (bfd_error_nonrepresentable_section
);
1584 if (sec
->output_section
!= NULL
)
1586 off
= sec
->output_offset
;
1587 sec
= sec
->output_section
;
1590 if (bfd_is_abs_section (sec
))
1591 sym_pointer
->e_type
[0] |= N_ABS
;
1592 else if (sec
== obj_textsec (abfd
))
1593 sym_pointer
->e_type
[0] |= N_TEXT
;
1594 else if (sec
== obj_datasec (abfd
))
1595 sym_pointer
->e_type
[0] |= N_DATA
;
1596 else if (sec
== obj_bsssec (abfd
))
1597 sym_pointer
->e_type
[0] |= N_BSS
;
1598 else if (bfd_is_und_section (sec
))
1599 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1600 else if (bfd_is_ind_section (sec
))
1601 sym_pointer
->e_type
[0] = N_INDR
;
1602 else if (bfd_is_com_section (sec
))
1603 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1606 if (aout_section_merge_with_text_p (abfd
, sec
))
1607 sym_pointer
->e_type
[0] |= N_TEXT
;
1611 /* xgettext:c-format */
1612 (_("%pB: can not represent section `%pA' in a.out object file format"),
1614 bfd_set_error (bfd_error_nonrepresentable_section
);
1619 /* Turn the symbol from section relative to absolute again. */
1620 value
+= sec
->vma
+ off
;
1622 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1623 sym_pointer
->e_type
[0] = N_WARNING
;
1625 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1626 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1627 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1628 sym_pointer
->e_type
[0] |= N_EXT
;
1629 else if ((cache_ptr
->flags
& BSF_LOCAL
) != 0)
1630 sym_pointer
->e_type
[0] &= ~N_EXT
;
1632 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1634 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1638 case N_ABS
: type
= N_SETA
; break;
1639 case N_TEXT
: type
= N_SETT
; break;
1640 case N_DATA
: type
= N_SETD
; break;
1641 case N_BSS
: type
= N_SETB
; break;
1643 sym_pointer
->e_type
[0] = type
;
1646 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1650 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1653 case N_ABS
: type
= N_WEAKA
; break;
1654 case N_TEXT
: type
= N_WEAKT
; break;
1655 case N_DATA
: type
= N_WEAKD
; break;
1656 case N_BSS
: type
= N_WEAKB
; break;
1657 case N_UNDF
: type
= N_WEAKU
; break;
1659 sym_pointer
->e_type
[0] = type
;
1662 PUT_WORD (abfd
, value
, sym_pointer
->e_value
);
1667 /* Native-level interface to symbols. */
1670 NAME (aout
, make_empty_symbol
) (bfd
*abfd
)
1672 size_t amt
= sizeof (aout_symbol_type
);
1674 aout_symbol_type
*new_symbol
= (aout_symbol_type
*) bfd_zalloc (abfd
, amt
);
1677 new_symbol
->symbol
.the_bfd
= abfd
;
1679 return &new_symbol
->symbol
;
1682 /* Translate a set of external symbols into internal symbols. */
1685 NAME (aout
, translate_symbol_table
) (bfd
*abfd
,
1686 aout_symbol_type
*in
,
1687 struct external_nlist
*ext
,
1688 bfd_size_type count
,
1690 bfd_size_type strsize
,
1693 struct external_nlist
*ext_end
;
1695 ext_end
= ext
+ count
;
1696 for (; ext
< ext_end
; ext
++, in
++)
1700 x
= GET_WORD (abfd
, ext
->e_strx
);
1701 in
->symbol
.the_bfd
= abfd
;
1703 /* For the normal symbols, the zero index points at the number
1704 of bytes in the string table but is to be interpreted as the
1705 null string. For the dynamic symbols, the number of bytes in
1706 the string table is stored in the __DYNAMIC structure and the
1707 zero index points at an actual string. */
1708 if (x
== 0 && ! dynamic
)
1709 in
->symbol
.name
= "";
1710 else if (x
< strsize
)
1711 in
->symbol
.name
= str
+ x
;
1715 (_("%pB: invalid string offset %" PRIu64
" >= %" PRIu64
),
1716 abfd
, (uint64_t) x
, (uint64_t) strsize
);
1717 bfd_set_error (bfd_error_bad_value
);
1721 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1722 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1723 in
->other
= H_GET_8 (abfd
, ext
->e_other
);
1724 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1725 in
->symbol
.udata
.p
= NULL
;
1727 if (! translate_from_native_sym_flags (abfd
, in
))
1731 in
->symbol
.flags
|= BSF_DYNAMIC
;
1737 /* We read the symbols into a buffer, which is discarded when this
1738 function exits. We read the strings into a buffer large enough to
1739 hold them all plus all the cached symbol entries. */
1742 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1744 struct external_nlist
*old_external_syms
;
1745 aout_symbol_type
*cached
;
1746 bfd_size_type cached_size
;
1748 /* If there's no work to be done, don't do any. */
1749 if (obj_aout_symbols (abfd
) != NULL
)
1752 old_external_syms
= obj_aout_external_syms (abfd
);
1754 if (! aout_get_external_symbols (abfd
))
1757 cached_size
= obj_aout_external_sym_count (abfd
);
1758 if (cached_size
== 0)
1759 return true; /* Nothing to do. */
1761 cached_size
*= sizeof (aout_symbol_type
);
1762 cached
= (aout_symbol_type
*) bfd_zmalloc (cached_size
);
1766 /* Convert from external symbol information to internal. */
1767 if (! (NAME (aout
, translate_symbol_table
)
1769 obj_aout_external_syms (abfd
),
1770 obj_aout_external_sym_count (abfd
),
1771 obj_aout_external_strings (abfd
),
1772 obj_aout_external_string_size (abfd
),
1779 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
1781 obj_aout_symbols (abfd
) = cached
;
1783 /* It is very likely that anybody who calls this function will not
1784 want the external symbol information, so if it was allocated
1785 because of our call to aout_get_external_symbols, we free it up
1786 right away to save space. */
1787 if (old_external_syms
== NULL
1788 && obj_aout_external_syms (abfd
) != NULL
)
1791 bfd_free_window (&obj_aout_sym_window (abfd
));
1793 free (obj_aout_external_syms (abfd
));
1795 obj_aout_external_syms (abfd
) = NULL
;
1801 /* We use a hash table when writing out symbols so that we only write
1802 out a particular string once. This helps particularly when the
1803 linker writes out stabs debugging entries, because each different
1804 contributing object file tends to have many duplicate stabs
1807 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1808 if BFD_TRADITIONAL_FORMAT is set. */
1810 /* Get the index of a string in a strtab, adding it if it is not
1813 static inline bfd_size_type
1814 add_to_stringtab (bfd
*abfd
,
1815 struct bfd_strtab_hash
*tab
,
1820 bfd_size_type str_index
;
1822 /* An index of 0 always means the empty string. */
1823 if (str
== 0 || *str
== '\0')
1826 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1827 doesn't understand a hashed string table. */
1829 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1832 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1834 if (str_index
!= (bfd_size_type
) -1)
1835 /* Add BYTES_IN_WORD to the return value to account for the
1836 space taken up by the string table size. */
1837 str_index
+= BYTES_IN_WORD
;
1842 /* Write out a strtab. ABFD is already at the right location in the
1846 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1848 bfd_byte buffer
[BYTES_IN_WORD
];
1849 size_t amt
= BYTES_IN_WORD
;
1851 /* The string table starts with the size. */
1852 PUT_WORD (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_WORD
, buffer
);
1853 if (bfd_bwrite ((void *) buffer
, amt
, abfd
) != amt
)
1856 return _bfd_stringtab_emit (abfd
, tab
);
1860 NAME (aout
, write_syms
) (bfd
*abfd
)
1862 unsigned int count
;
1863 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1864 struct bfd_strtab_hash
*strtab
;
1866 strtab
= _bfd_stringtab_init ();
1870 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1872 asymbol
*g
= generic
[count
];
1874 struct external_nlist nsp
;
1877 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, false);
1878 if (indx
== (bfd_size_type
) -1)
1880 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1882 if (bfd_asymbol_flavour (g
) == abfd
->xvec
->flavour
)
1884 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1885 H_PUT_8 (abfd
, aout_symbol (g
)->other
, nsp
.e_other
);
1886 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1890 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1891 H_PUT_8 (abfd
, 0, nsp
.e_other
);
1892 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1895 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1898 amt
= EXTERNAL_NLIST_SIZE
;
1899 if (bfd_bwrite ((void *) &nsp
, amt
, abfd
) != amt
)
1902 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1903 here, at the end. */
1907 if (! emit_stringtab (abfd
, strtab
))
1910 _bfd_stringtab_free (strtab
);
1915 _bfd_stringtab_free (strtab
);
1920 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1922 unsigned int counter
= 0;
1923 aout_symbol_type
*symbase
;
1925 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1928 for (symbase
= obj_aout_symbols (abfd
);
1929 counter
++ < bfd_get_symcount (abfd
);
1931 *(location
++) = (asymbol
*) (symbase
++);
1933 return bfd_get_symcount (abfd
);
1936 /* Standard reloc stuff. */
1937 /* Output standard relocation information to a file in target byte order. */
1939 extern void NAME (aout
, swap_std_reloc_out
)
1940 (bfd
*, arelent
*, struct reloc_std_external
*);
1943 NAME (aout
, swap_std_reloc_out
) (bfd
*abfd
,
1945 struct reloc_std_external
*natptr
)
1948 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1950 unsigned int r_length
, r_size
;
1952 int r_baserel
, r_jmptable
, r_relative
;
1953 asection
*output_section
= sym
->section
->output_section
;
1955 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
1957 BFD_ASSERT (g
->howto
!= NULL
);
1959 r_size
= bfd_get_reloc_size (g
->howto
);
1960 r_length
= bfd_log2 (r_size
);
1961 if (1u << r_length
!= r_size
)
1963 _bfd_error_handler (_("%pB: unsupported AOUT relocation size: %d"),
1965 bfd_set_error (bfd_error_bad_value
);
1969 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1970 /* XXX This relies on relocs coming from a.out files. */
1971 r_baserel
= (g
->howto
->type
& 8) != 0;
1972 r_jmptable
= (g
->howto
->type
& 16) != 0;
1973 r_relative
= (g
->howto
->type
& 32) != 0;
1975 /* Name was clobbered by aout_write_syms to be symbol index. */
1977 /* If this relocation is relative to a symbol then set the
1978 r_index to the symbols index, and the r_extern bit.
1980 Absolute symbols can come in in two ways, either as an offset
1981 from the abs section, or as a symbol which has an abs value.
1982 check for that here. */
1984 if (bfd_is_com_section (output_section
)
1985 || bfd_is_abs_section (output_section
)
1986 || bfd_is_und_section (output_section
)
1987 /* PR gas/3041 a.out relocs against weak symbols
1988 must be treated as if they were against externs. */
1989 || (sym
->flags
& BSF_WEAK
))
1991 if (bfd_abs_section_ptr
->symbol
== sym
)
1993 /* Whoops, looked like an abs symbol, but is
1994 really an offset from the abs section. */
2000 /* Fill in symbol. */
2002 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2007 /* Just an ordinary section. */
2009 r_index
= output_section
->target_index
;
2012 /* Now the fun stuff. */
2013 if (bfd_header_big_endian (abfd
))
2015 natptr
->r_index
[0] = r_index
>> 16;
2016 natptr
->r_index
[1] = r_index
>> 8;
2017 natptr
->r_index
[2] = r_index
;
2018 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2019 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2020 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2021 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2022 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2023 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
2027 natptr
->r_index
[2] = r_index
>> 16;
2028 natptr
->r_index
[1] = r_index
>> 8;
2029 natptr
->r_index
[0] = r_index
;
2030 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2031 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2032 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2033 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2034 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2035 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
2039 /* Extended stuff. */
2040 /* Output extended relocation information to a file in target byte order. */
2042 extern void NAME (aout
, swap_ext_reloc_out
)
2043 (bfd
*, arelent
*, struct reloc_ext_external
*);
2046 NAME (aout
, swap_ext_reloc_out
) (bfd
*abfd
,
2048 struct reloc_ext_external
*natptr
)
2052 unsigned int r_type
;
2054 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2055 asection
*output_section
= sym
->section
->output_section
;
2057 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2059 r_type
= (unsigned int) g
->howto
->type
;
2061 r_addend
= g
->addend
;
2062 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2063 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2065 /* If this relocation is relative to a symbol then set the
2066 r_index to the symbols index, and the r_extern bit.
2068 Absolute symbols can come in in two ways, either as an offset
2069 from the abs section, or as a symbol which has an abs value.
2070 check for that here. */
2071 if (bfd_is_abs_section (bfd_asymbol_section (sym
)))
2076 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2078 if (bfd_is_und_section (bfd_asymbol_section (sym
))
2079 || (sym
->flags
& BSF_GLOBAL
) != 0)
2083 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2087 /* Just an ordinary section. */
2089 r_index
= output_section
->target_index
;
2092 /* Now the fun stuff. */
2093 if (bfd_header_big_endian (abfd
))
2095 natptr
->r_index
[0] = r_index
>> 16;
2096 natptr
->r_index
[1] = r_index
>> 8;
2097 natptr
->r_index
[2] = r_index
;
2098 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2099 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2103 natptr
->r_index
[2] = r_index
>> 16;
2104 natptr
->r_index
[1] = r_index
>> 8;
2105 natptr
->r_index
[0] = r_index
;
2106 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2107 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
));
2110 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2113 /* BFD deals internally with all things based from the section they're
2114 in. so, something in 10 bytes into a text section with a base of
2115 50 would have a symbol (.text+10) and know .text vma was 50.
2117 Aout keeps all it's symbols based from zero, so the symbol would
2118 contain 60. This macro subs the base of each section from the value
2119 to give the true offset from the section. */
2121 #define MOVE_ADDRESS(ad) \
2124 /* Undefined symbol. */ \
2125 if (r_index < bfd_get_symcount (abfd)) \
2126 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2127 cache_ptr->addend = ad; \
2131 /* Defined, section relative. Replace symbol with pointer to \
2132 symbol which points to section. */ \
2136 case N_TEXT | N_EXT: \
2137 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2138 cache_ptr->addend = ad - su->textsec->vma; \
2141 case N_DATA | N_EXT: \
2142 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2143 cache_ptr->addend = ad - su->datasec->vma; \
2146 case N_BSS | N_EXT: \
2147 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2148 cache_ptr->addend = ad - su->bsssec->vma; \
2152 case N_ABS | N_EXT: \
2153 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2154 cache_ptr->addend = ad; \
2160 NAME (aout
, swap_ext_reloc_in
) (bfd
*abfd
,
2161 struct reloc_ext_external
*bytes
,
2164 bfd_size_type symcount
)
2166 unsigned int r_index
;
2168 unsigned int r_type
;
2169 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2171 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2173 /* Now the fun stuff. */
2174 if (bfd_header_big_endian (abfd
))
2176 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2177 | ((unsigned int) bytes
->r_index
[1] << 8)
2178 | bytes
->r_index
[2]);
2179 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2180 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2181 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
2185 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2186 | ((unsigned int) bytes
->r_index
[1] << 8)
2187 | bytes
->r_index
[0]);
2188 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2189 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2190 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2193 if (r_type
< TABLE_SIZE (howto_table_ext
))
2194 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2196 cache_ptr
->howto
= NULL
;
2198 /* Base relative relocs are always against the symbol table,
2199 regardless of the setting of r_extern. r_extern just reflects
2200 whether the symbol the reloc is against is local or global. */
2201 if (r_type
== (unsigned int) RELOC_BASE10
2202 || r_type
== (unsigned int) RELOC_BASE13
2203 || r_type
== (unsigned int) RELOC_BASE22
)
2206 if (r_extern
&& r_index
> symcount
)
2208 /* We could arrange to return an error, but it might be useful
2209 to see the file even if it is bad. */
2214 MOVE_ADDRESS (GET_SWORD (abfd
, bytes
->r_addend
));
2218 NAME (aout
, swap_std_reloc_in
) (bfd
*abfd
,
2219 struct reloc_std_external
*bytes
,
2222 bfd_size_type symcount
)
2224 unsigned int r_index
;
2226 unsigned int r_length
;
2228 int r_baserel
, r_jmptable
, r_relative
;
2229 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2230 unsigned int howto_idx
;
2232 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
2234 /* Now the fun stuff. */
2235 if (bfd_header_big_endian (abfd
))
2237 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2238 | ((unsigned int) bytes
->r_index
[1] << 8)
2239 | bytes
->r_index
[2]);
2240 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2241 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2242 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2243 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2244 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2245 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2246 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
2250 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2251 | ((unsigned int) bytes
->r_index
[1] << 8)
2252 | bytes
->r_index
[0]);
2253 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2254 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2255 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2256 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2257 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2258 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2259 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2262 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2263 + 16 * r_jmptable
+ 32 * r_relative
);
2264 if (howto_idx
< TABLE_SIZE (howto_table_std
))
2266 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2267 if (cache_ptr
->howto
->type
== (unsigned int) -1)
2268 cache_ptr
->howto
= NULL
;
2271 cache_ptr
->howto
= NULL
;
2273 /* Base relative relocs are always against the symbol table,
2274 regardless of the setting of r_extern. r_extern just reflects
2275 whether the symbol the reloc is against is local or global. */
2279 if (r_extern
&& r_index
>= symcount
)
2281 /* We could arrange to return an error, but it might be useful
2282 to see the file even if it is bad. FIXME: Of course this
2283 means that objdump -r *doesn't* see the actual reloc, and
2284 objcopy silently writes a different reloc. */
2292 /* Read and swap the relocs for a section. */
2295 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
2297 bfd_size_type count
;
2298 bfd_size_type reloc_size
;
2300 arelent
*reloc_cache
;
2302 unsigned int counter
= 0;
2306 if (asect
->relocation
)
2309 if (asect
->flags
& SEC_CONSTRUCTOR
)
2312 if (asect
== obj_datasec (abfd
))
2313 reloc_size
= exec_hdr (abfd
)->a_drsize
;
2314 else if (asect
== obj_textsec (abfd
))
2315 reloc_size
= exec_hdr (abfd
)->a_trsize
;
2316 else if (asect
== obj_bsssec (abfd
))
2320 bfd_set_error (bfd_error_invalid_operation
);
2324 each_size
= obj_reloc_entry_size (abfd
);
2325 count
= reloc_size
/ each_size
;
2327 return true; /* Nothing to be done. */
2329 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2331 relocs
= _bfd_malloc_and_read (abfd
, reloc_size
, reloc_size
);
2335 amt
= count
* sizeof (arelent
);
2336 reloc_cache
= (arelent
*) bfd_zmalloc (amt
);
2337 if (reloc_cache
== NULL
)
2343 cache_ptr
= reloc_cache
;
2344 if (each_size
== RELOC_EXT_SIZE
)
2346 struct reloc_ext_external
*rptr
= (struct reloc_ext_external
*) relocs
;
2348 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2349 MY_swap_ext_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2350 (bfd_size_type
) bfd_get_symcount (abfd
));
2354 struct reloc_std_external
*rptr
= (struct reloc_std_external
*) relocs
;
2356 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2357 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2358 (bfd_size_type
) bfd_get_symcount (abfd
));
2363 asect
->relocation
= reloc_cache
;
2364 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2369 /* Write out a relocation section into an object file. */
2372 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2375 unsigned char *native
, *natptr
;
2378 unsigned int count
= section
->reloc_count
;
2379 bfd_size_type natsize
;
2381 if (count
== 0 || section
->orelocation
== NULL
)
2384 each_size
= obj_reloc_entry_size (abfd
);
2385 natsize
= (bfd_size_type
) each_size
* count
;
2386 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2390 generic
= section
->orelocation
;
2392 if (each_size
== RELOC_EXT_SIZE
)
2394 for (natptr
= native
;
2396 --count
, natptr
+= each_size
, ++generic
)
2398 /* PR 20921: If the howto field has not been initialised then skip
2400 PR 20929: Similarly for the symbol field. */
2401 if ((*generic
)->howto
== NULL
2402 || (*generic
)->sym_ptr_ptr
== NULL
)
2404 bfd_set_error (bfd_error_invalid_operation
);
2405 _bfd_error_handler (_("%pB: attempt to write out "
2406 "unknown reloc type"), abfd
);
2409 MY_swap_ext_reloc_out (abfd
, *generic
,
2410 (struct reloc_ext_external
*) natptr
);
2415 for (natptr
= native
;
2417 --count
, natptr
+= each_size
, ++generic
)
2419 if ((*generic
)->howto
== NULL
2420 || (*generic
)->sym_ptr_ptr
== NULL
)
2422 bfd_set_error (bfd_error_invalid_operation
);
2423 _bfd_error_handler (_("%pB: attempt to write out "
2424 "unknown reloc type"), abfd
);
2427 MY_swap_std_reloc_out (abfd
, *generic
,
2428 (struct reloc_std_external
*) natptr
);
2432 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2434 bfd_release (abfd
, native
);
2437 bfd_release (abfd
, native
);
2442 /* This is stupid. This function should be a boolean predicate. */
2445 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2450 arelent
*tblptr
= section
->relocation
;
2453 if (section
== obj_bsssec (abfd
))
2459 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
) (abfd
, section
, symbols
)))
2462 if (section
->flags
& SEC_CONSTRUCTOR
)
2464 arelent_chain
*chain
= section
->constructor_chain
;
2465 for (count
= 0; count
< section
->reloc_count
; count
++)
2467 *relptr
++ = &chain
->relent
;
2468 chain
= chain
->next
;
2473 tblptr
= section
->relocation
;
2475 for (count
= 0; count
++ < section
->reloc_count
; )
2477 *relptr
++ = tblptr
++;
2482 return section
->reloc_count
;
2486 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2488 bfd_size_type count
;
2490 if (bfd_get_format (abfd
) != bfd_object
)
2492 bfd_set_error (bfd_error_invalid_operation
);
2496 if (asect
->flags
& SEC_CONSTRUCTOR
)
2497 count
= asect
->reloc_count
;
2498 else if (asect
== obj_datasec (abfd
))
2499 count
= exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
2500 else if (asect
== obj_textsec (abfd
))
2501 count
= exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
2502 else if (asect
== obj_bsssec (abfd
))
2506 bfd_set_error (bfd_error_invalid_operation
);
2510 if (count
>= LONG_MAX
/ sizeof (arelent
*))
2512 bfd_set_error (bfd_error_file_too_big
);
2515 return (count
+ 1) * sizeof (arelent
*);
2519 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2521 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2524 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2528 NAME (aout
, get_lineno
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2529 asymbol
*ignore_symbol ATTRIBUTE_UNUSED
)
2535 NAME (aout
, get_symbol_info
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2539 bfd_symbol_info (symbol
, ret
);
2541 if (ret
->type
== '?')
2543 int type_code
= aout_symbol (symbol
)->type
& 0xff;
2544 const char *stab_name
= bfd_get_stab_name (type_code
);
2545 static char buf
[10];
2547 if (stab_name
== NULL
)
2549 sprintf (buf
, "(%d)", type_code
);
2553 ret
->stab_type
= type_code
;
2554 ret
->stab_other
= (unsigned) (aout_symbol (symbol
)->other
& 0xff);
2555 ret
->stab_desc
= (unsigned) (aout_symbol (symbol
)->desc
& 0xffff);
2556 ret
->stab_name
= stab_name
;
2561 NAME (aout
, print_symbol
) (bfd
*abfd
,
2564 bfd_print_symbol_type how
)
2566 FILE *file
= (FILE *)afile
;
2570 case bfd_print_symbol_name
:
2572 fprintf (file
,"%s", symbol
->name
);
2574 case bfd_print_symbol_more
:
2575 fprintf (file
,"%4x %2x %2x",
2576 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2577 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2578 (unsigned) (aout_symbol (symbol
)->type
));
2580 case bfd_print_symbol_all
:
2582 const char *section_name
= symbol
->section
->name
;
2584 bfd_print_symbol_vandf (abfd
, (void *)file
, symbol
);
2586 fprintf (file
," %-5s %04x %02x %02x",
2588 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2589 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2590 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2592 fprintf (file
," %s", symbol
->name
);
2598 /* If we don't have to allocate more than 1MB to hold the generic
2599 symbols, we use the generic minisymbol methord: it's faster, since
2600 it only translates the symbols once, not multiple times. */
2601 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2603 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2604 symbols. The minisymbol_to_symbol function translates these into
2605 BFD asymbol structures. */
2608 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2611 unsigned int *sizep
)
2614 /* We could handle the dynamic symbols here as well, but it's
2615 easier to hand them off. */
2616 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2618 if (! aout_get_external_symbols (abfd
))
2621 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2622 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2624 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2626 /* By passing the external symbols back from this routine, we are
2627 giving up control over the memory block. Clear
2628 obj_aout_external_syms, so that we do not try to free it
2630 obj_aout_external_syms (abfd
) = NULL
;
2632 *sizep
= EXTERNAL_NLIST_SIZE
;
2633 return obj_aout_external_sym_count (abfd
);
2636 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2637 unmodified a.out symbol. The SYM argument is a structure returned
2638 by bfd_make_empty_symbol, which we fill in here. */
2641 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2643 const void * minisym
,
2647 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2648 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2650 memset (sym
, 0, sizeof (aout_symbol_type
));
2652 /* We call translate_symbol_table to translate a single symbol. */
2653 if (! (NAME (aout
, translate_symbol_table
)
2655 (aout_symbol_type
*) sym
,
2656 (struct external_nlist
*) minisym
,
2658 obj_aout_external_strings (abfd
),
2659 obj_aout_external_string_size (abfd
),
2666 /* Provided a BFD, a section and an offset into the section, calculate
2667 and return the name of the source file and the line nearest to the
2671 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2675 const char **filename_ptr
,
2676 const char **functionname_ptr
,
2677 unsigned int *line_ptr
,
2678 unsigned int *disriminator_ptr
)
2680 /* Run down the file looking for the filename, function and linenumber. */
2682 const char *directory_name
= NULL
;
2683 const char *main_file_name
= NULL
;
2684 const char *current_file_name
= NULL
;
2685 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2686 const char *line_directory_name
= NULL
; /* Value of directory_name at line number. */
2687 bfd_vma low_line_vma
= 0;
2688 bfd_vma low_func_vma
= 0;
2690 bfd_size_type filelen
, funclen
;
2693 *filename_ptr
= bfd_get_filename (abfd
);
2694 *functionname_ptr
= NULL
;
2696 if (disriminator_ptr
)
2697 *disriminator_ptr
= 0;
2699 if (symbols
!= NULL
)
2701 for (p
= symbols
; *p
; p
++)
2703 aout_symbol_type
*q
= (aout_symbol_type
*) (*p
);
2708 /* If this looks like a file name symbol, and it comes after
2709 the line number we have found so far, but before the
2710 offset, then we have probably not found the right line
2712 if (q
->symbol
.value
<= offset
2713 && ((q
->symbol
.value
> low_line_vma
2714 && (line_file_name
!= NULL
2716 || (q
->symbol
.value
> low_func_vma
2719 const char *symname
;
2721 symname
= q
->symbol
.name
;
2724 && strlen (symname
) > 2
2725 && strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2727 if (q
->symbol
.value
> low_line_vma
)
2730 line_file_name
= NULL
;
2732 if (q
->symbol
.value
> low_func_vma
)
2739 /* If this symbol is less than the offset, but greater than
2740 the line number we have found so far, then we have not
2741 found the right line number. */
2742 if (q
->symbol
.value
<= offset
)
2744 if (q
->symbol
.value
> low_line_vma
)
2747 line_file_name
= NULL
;
2749 if (q
->symbol
.value
> low_func_vma
)
2753 main_file_name
= current_file_name
= q
->symbol
.name
;
2754 /* Look ahead to next symbol to check if that too is an N_SO. */
2758 q
= (aout_symbol_type
*) (*p
);
2759 if (q
->type
!= (int)N_SO
)
2762 /* Found a second N_SO First is directory; second is filename. */
2763 directory_name
= current_file_name
;
2764 main_file_name
= current_file_name
= q
->symbol
.name
;
2765 if (obj_textsec (abfd
) != section
)
2769 current_file_name
= q
->symbol
.name
;
2776 /* We'll keep this if it resolves nearer than the one we have
2778 if (q
->symbol
.value
>= low_line_vma
2779 && q
->symbol
.value
<= offset
)
2781 *line_ptr
= q
->desc
;
2782 low_line_vma
= q
->symbol
.value
;
2783 line_file_name
= current_file_name
;
2784 line_directory_name
= directory_name
;
2789 /* We'll keep this if it is nearer than the one we have already. */
2790 if (q
->symbol
.value
>= low_func_vma
2791 && q
->symbol
.value
<= offset
)
2793 low_func_vma
= q
->symbol
.value
;
2794 func
= (asymbol
*)q
;
2796 else if (q
->symbol
.value
> offset
)
2807 main_file_name
= line_file_name
;
2808 directory_name
= line_directory_name
;
2811 if (main_file_name
== NULL
2812 || IS_ABSOLUTE_PATH (main_file_name
)
2813 || directory_name
== NULL
)
2816 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2821 funclen
= strlen (bfd_asymbol_name (func
));
2823 free (adata (abfd
).line_buf
);
2825 if (filelen
+ funclen
== 0)
2826 adata (abfd
).line_buf
= buf
= NULL
;
2829 buf
= (char *) bfd_malloc (filelen
+ funclen
+ 3);
2830 adata (abfd
).line_buf
= buf
;
2835 if (main_file_name
!= NULL
)
2837 if (IS_ABSOLUTE_PATH (main_file_name
) || directory_name
== NULL
)
2838 *filename_ptr
= main_file_name
;
2842 /* PR binutils/20891: In a corrupt input file both
2843 main_file_name and directory_name can be empty... */
2844 * filename_ptr
= NULL
;
2847 snprintf (buf
, filelen
+ 1, "%s%s", directory_name
,
2849 *filename_ptr
= buf
;
2857 const char *function
= func
->name
;
2862 /* PR binutils/20892: In a corrupt input file func can be empty. */
2863 * functionname_ptr
= NULL
;
2866 /* The caller expects a symbol name. We actually have a
2867 function name, without the leading underscore. Put the
2868 underscore back in, so that the caller gets a symbol name. */
2869 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2870 strcpy (buf
, function
);
2873 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2874 strcpy (buf
+ 1, function
);
2876 /* Have to remove : stuff. */
2877 colon
= strchr (buf
, ':');
2880 *functionname_ptr
= buf
;
2887 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2888 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2890 return adata (abfd
).exec_bytes_size
;
2893 /* Free all information we have cached for this BFD. We can always
2894 read it again later if we need it. */
2897 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2901 if (bfd_get_format (abfd
) != bfd_object
2902 || abfd
->tdata
.aout_data
== NULL
)
2905 #define BFCI_FREE(x) do { free (x); x = NULL; } while (0)
2906 BFCI_FREE (obj_aout_symbols (abfd
));
2908 obj_aout_external_syms (abfd
) = 0;
2909 bfd_free_window (&obj_aout_sym_window (abfd
));
2910 bfd_free_window (&obj_aout_string_window (abfd
));
2911 obj_aout_external_strings (abfd
) = 0;
2913 BFCI_FREE (obj_aout_external_syms (abfd
));
2914 BFCI_FREE (obj_aout_external_strings (abfd
));
2916 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2917 BFCI_FREE (o
->relocation
);
2923 /* a.out link code. */
2925 /* Routine to create an entry in an a.out link hash table. */
2927 struct bfd_hash_entry
*
2928 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2929 struct bfd_hash_table
*table
,
2932 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2934 /* Allocate the structure if it has not already been allocated by a
2937 ret
= (struct aout_link_hash_entry
*) bfd_hash_allocate (table
,
2942 /* Call the allocation method of the superclass. */
2943 ret
= ((struct aout_link_hash_entry
*)
2944 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2948 /* Set local fields. */
2949 ret
->written
= false;
2953 return (struct bfd_hash_entry
*) ret
;
2956 /* Initialize an a.out link hash table. */
2959 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2961 struct bfd_hash_entry
*(*newfunc
)
2962 (struct bfd_hash_entry
*, struct bfd_hash_table
*,
2964 unsigned int entsize
)
2966 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2969 /* Create an a.out link hash table. */
2971 struct bfd_link_hash_table
*
2972 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2974 struct aout_link_hash_table
*ret
;
2975 size_t amt
= sizeof (* ret
);
2977 ret
= (struct aout_link_hash_table
*) bfd_malloc (amt
);
2981 if (!NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2982 NAME (aout
, link_hash_newfunc
),
2983 sizeof (struct aout_link_hash_entry
)))
2991 /* Add all symbols from an object file to the hash table. */
2994 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2996 bool (*add_one_symbol
)
2997 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
2998 bfd_vma
, const char *, bool, bool, struct bfd_link_hash_entry
**);
2999 struct external_nlist
*syms
;
3000 bfd_size_type sym_count
;
3003 struct aout_link_hash_entry
**sym_hash
;
3004 struct external_nlist
*p
;
3005 struct external_nlist
*pend
;
3008 syms
= obj_aout_external_syms (abfd
);
3009 sym_count
= obj_aout_external_sym_count (abfd
);
3010 strings
= obj_aout_external_strings (abfd
);
3011 if (info
->keep_memory
)
3016 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
3018 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
3019 (abfd
, info
, &syms
, &sym_count
, &strings
)))
3024 return true; /* Nothing to do. */
3026 /* We keep a list of the linker hash table entries that correspond
3027 to particular symbols. We could just look them up in the hash
3028 table, but keeping the list is more efficient. Perhaps this
3029 should be conditional on info->keep_memory. */
3030 amt
= sym_count
* sizeof (struct aout_link_hash_entry
*);
3031 sym_hash
= (struct aout_link_hash_entry
**) bfd_alloc (abfd
, amt
);
3032 if (sym_hash
== NULL
)
3034 obj_aout_sym_hashes (abfd
) = sym_hash
;
3036 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
3037 if (add_one_symbol
== NULL
)
3038 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
3041 pend
= p
+ sym_count
;
3042 for (; p
< pend
; p
++, sym_hash
++)
3053 type
= H_GET_8 (abfd
, p
->e_type
);
3055 /* Ignore debugging symbols. */
3056 if ((type
& N_STAB
) != 0)
3059 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3060 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3062 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3063 value
= GET_WORD (abfd
, p
->e_value
);
3080 /* Ignore symbols that are not externally visible. */
3083 /* Ignore local indirect symbol. */
3088 case N_UNDF
| N_EXT
:
3091 section
= bfd_und_section_ptr
;
3095 section
= bfd_com_section_ptr
;
3098 section
= bfd_abs_section_ptr
;
3100 case N_TEXT
| N_EXT
:
3101 section
= obj_textsec (abfd
);
3102 value
-= bfd_section_vma (section
);
3104 case N_DATA
| N_EXT
:
3105 case N_SETV
| N_EXT
:
3106 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3107 translate_from_native_sym_flags. */
3108 section
= obj_datasec (abfd
);
3109 value
-= bfd_section_vma (section
);
3112 section
= obj_bsssec (abfd
);
3113 value
-= bfd_section_vma (section
);
3115 case N_INDR
| N_EXT
:
3116 /* An indirect symbol. The next symbol is the symbol
3117 which this one really is. */
3118 /* See PR 20925 for a reproducer. */
3122 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3123 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3125 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3126 section
= bfd_ind_section_ptr
;
3127 flags
|= BSF_INDIRECT
;
3129 case N_COMM
| N_EXT
:
3130 section
= bfd_com_section_ptr
;
3132 case N_SETA
: case N_SETA
| N_EXT
:
3133 section
= bfd_abs_section_ptr
;
3134 flags
|= BSF_CONSTRUCTOR
;
3136 case N_SETT
: case N_SETT
| N_EXT
:
3137 section
= obj_textsec (abfd
);
3138 flags
|= BSF_CONSTRUCTOR
;
3139 value
-= bfd_section_vma (section
);
3141 case N_SETD
: case N_SETD
| N_EXT
:
3142 section
= obj_datasec (abfd
);
3143 flags
|= BSF_CONSTRUCTOR
;
3144 value
-= bfd_section_vma (section
);
3146 case N_SETB
: case N_SETB
| N_EXT
:
3147 section
= obj_bsssec (abfd
);
3148 flags
|= BSF_CONSTRUCTOR
;
3149 value
-= bfd_section_vma (section
);
3152 /* A warning symbol. The next symbol is the one to warn
3153 about. If there is no next symbol, just look away. */
3158 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3159 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3161 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3162 section
= bfd_und_section_ptr
;
3163 flags
|= BSF_WARNING
;
3166 section
= bfd_und_section_ptr
;
3170 section
= bfd_abs_section_ptr
;
3174 section
= obj_textsec (abfd
);
3175 value
-= bfd_section_vma (section
);
3179 section
= obj_datasec (abfd
);
3180 value
-= bfd_section_vma (section
);
3184 section
= obj_bsssec (abfd
);
3185 value
-= bfd_section_vma (section
);
3190 if (! ((*add_one_symbol
)
3191 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, false,
3192 (struct bfd_link_hash_entry
**) sym_hash
)))
3195 /* Restrict the maximum alignment of a common symbol based on
3196 the architecture, since a.out has no way to represent
3197 alignment requirements of a section in a .o file. FIXME:
3198 This isn't quite right: it should use the architecture of the
3199 output file, not the input files. */
3200 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3201 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3202 bfd_get_arch_info (abfd
)->section_align_power
))
3203 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3204 bfd_get_arch_info (abfd
)->section_align_power
;
3206 /* If this is a set symbol, and we are not building sets, then
3207 it is possible for the hash entry to not have been set. In
3208 such a case, treat the symbol as not globally defined. */
3209 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3211 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3215 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3222 /* Free up the internal symbols read from an a.out file. */
3225 aout_link_free_symbols (bfd
*abfd
)
3227 if (obj_aout_external_syms (abfd
) != NULL
)
3230 bfd_free_window (&obj_aout_sym_window (abfd
));
3232 free ((void *) obj_aout_external_syms (abfd
));
3234 obj_aout_external_syms (abfd
) = NULL
;
3236 if (obj_aout_external_strings (abfd
) != NULL
)
3239 bfd_free_window (&obj_aout_string_window (abfd
));
3241 free ((void *) obj_aout_external_strings (abfd
));
3243 obj_aout_external_strings (abfd
) = NULL
;
3248 /* Add symbols from an a.out object file. */
3251 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3253 if (! aout_get_external_symbols (abfd
))
3255 if (! aout_link_add_symbols (abfd
, info
))
3257 if (! info
->keep_memory
)
3259 if (! aout_link_free_symbols (abfd
))
3265 /* Look through the internal symbols to see if this object file should
3266 be included in the link. We should include this object file if it
3267 defines any symbols which are currently undefined. If this object
3268 file defines a common symbol, then we may adjust the size of the
3269 known symbol but we do not include the object file in the link
3270 (unless there is some other reason to include it). */
3273 aout_link_check_ar_symbols (bfd
*abfd
,
3274 struct bfd_link_info
*info
,
3278 struct external_nlist
*p
;
3279 struct external_nlist
*pend
;
3284 /* Look through all the symbols. */
3285 p
= obj_aout_external_syms (abfd
);
3286 pend
= p
+ obj_aout_external_sym_count (abfd
);
3287 strings
= obj_aout_external_strings (abfd
);
3288 for (; p
< pend
; p
++)
3290 int type
= H_GET_8 (abfd
, p
->e_type
);
3292 struct bfd_link_hash_entry
*h
;
3294 /* Ignore symbols that are not externally visible. This is an
3295 optimization only, as we check the type more thoroughly
3297 if (((type
& N_EXT
) == 0
3298 || (type
& N_STAB
) != 0
3305 if (type
== N_WARNING
3311 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3312 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
3314 /* We are only interested in symbols that are currently
3315 undefined or common. */
3317 || (h
->type
!= bfd_link_hash_undefined
3318 && h
->type
!= bfd_link_hash_common
))
3320 if (type
== (N_INDR
| N_EXT
))
3325 if (type
== (N_TEXT
| N_EXT
)
3326 || type
== (N_DATA
| N_EXT
)
3327 || type
== (N_BSS
| N_EXT
)
3328 || type
== (N_ABS
| N_EXT
)
3329 || type
== (N_INDR
| N_EXT
))
3331 /* This object file defines this symbol. We must link it
3332 in. This is true regardless of whether the current
3333 definition of the symbol is undefined or common.
3335 If the current definition is common, we have a case in
3336 which we have already seen an object file including:
3338 and this object file from the archive includes:
3340 In such a case, whether to include this object is target
3341 dependant for backward compatibility.
3343 FIXME: The SunOS 4.1.3 linker will pull in the archive
3344 element if the symbol is defined in the .data section,
3345 but not if it is defined in the .text section. That
3346 seems a bit crazy to me, and it has not been implemented
3347 yet. However, it might be correct. */
3348 if (h
->type
== bfd_link_hash_common
)
3352 switch (info
->common_skip_ar_symbols
)
3354 case bfd_link_common_skip_none
:
3356 case bfd_link_common_skip_text
:
3357 skip
= (type
== (N_TEXT
| N_EXT
));
3359 case bfd_link_common_skip_data
:
3360 skip
= (type
== (N_DATA
| N_EXT
));
3362 case bfd_link_common_skip_all
:
3371 if (!(*info
->callbacks
3372 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3378 if (type
== (N_UNDF
| N_EXT
))
3382 value
= GET_WORD (abfd
, p
->e_value
);
3385 /* This symbol is common in the object from the archive
3387 if (h
->type
== bfd_link_hash_undefined
)
3392 symbfd
= h
->u
.undef
.abfd
;
3395 /* This symbol was created as undefined from
3396 outside BFD. We assume that we should link
3397 in the object file. This is done for the -u
3398 option in the linker. */
3399 if (!(*info
->callbacks
3400 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3405 /* Turn the current link symbol into a common
3406 symbol. It is already on the undefs list. */
3407 h
->type
= bfd_link_hash_common
;
3408 h
->u
.c
.p
= (struct bfd_link_hash_common_entry
*)
3409 bfd_hash_allocate (&info
->hash
->table
,
3410 sizeof (struct bfd_link_hash_common_entry
));
3411 if (h
->u
.c
.p
== NULL
)
3414 h
->u
.c
.size
= value
;
3416 /* FIXME: This isn't quite right. The maximum
3417 alignment of a common symbol should be set by the
3418 architecture of the output file, not of the input
3420 power
= bfd_log2 (value
);
3421 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3422 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3423 h
->u
.c
.p
->alignment_power
= power
;
3425 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3430 /* Adjust the size of the common symbol if
3432 if (value
> h
->u
.c
.size
)
3433 h
->u
.c
.size
= value
;
3443 /* This symbol is weak but defined. We must pull it in if
3444 the current link symbol is undefined, but we don't want
3445 it if the current link symbol is common. */
3446 if (h
->type
== bfd_link_hash_undefined
)
3448 if (!(*info
->callbacks
3449 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3457 /* We do not need this object file. */
3460 /* Check a single archive element to see if we need to include it in
3461 the link. *PNEEDED is set according to whether this element is
3462 needed in the link or not. This is called from
3463 _bfd_generic_link_add_archive_symbols. */
3466 aout_link_check_archive_element (bfd
*abfd
,
3467 struct bfd_link_info
*info
,
3468 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3469 const char *name ATTRIBUTE_UNUSED
,
3475 if (!aout_get_external_symbols (abfd
))
3479 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
3485 /* Potentially, the add_archive_element hook may have set a
3486 substitute BFD for us. */
3489 if (!info
->keep_memory
3490 && !aout_link_free_symbols (oldbfd
))
3492 if (!aout_get_external_symbols (abfd
))
3495 if (!aout_link_add_symbols (abfd
, info
))
3499 if (!info
->keep_memory
|| !needed
)
3501 if (!aout_link_free_symbols (abfd
))
3508 /* Given an a.out BFD, add symbols to the global hash table as
3512 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
3514 switch (bfd_get_format (abfd
))
3517 return aout_link_add_object_symbols (abfd
, info
);
3519 return _bfd_generic_link_add_archive_symbols
3520 (abfd
, info
, aout_link_check_archive_element
);
3522 bfd_set_error (bfd_error_wrong_format
);
3527 /* A hash table used for header files with N_BINCL entries. */
3529 struct aout_link_includes_table
3531 struct bfd_hash_table root
;
3534 /* A linked list of totals that we have found for a particular header
3537 struct aout_link_includes_totals
3539 struct aout_link_includes_totals
*next
;
3543 /* An entry in the header file hash table. */
3545 struct aout_link_includes_entry
3547 struct bfd_hash_entry root
;
3548 /* List of totals we have found for this file. */
3549 struct aout_link_includes_totals
*totals
;
3552 /* Look up an entry in an the header file hash table. */
3554 #define aout_link_includes_lookup(table, string, create, copy) \
3555 ((struct aout_link_includes_entry *) \
3556 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3558 /* During the final link step we need to pass around a bunch of
3559 information, so we do it in an instance of this structure. */
3561 struct aout_final_link_info
3563 /* General link information. */
3564 struct bfd_link_info
*info
;
3567 /* Reloc file positions. */
3568 file_ptr treloff
, dreloff
;
3569 /* File position of symbols. */
3572 struct bfd_strtab_hash
*strtab
;
3573 /* Header file hash table. */
3574 struct aout_link_includes_table includes
;
3575 /* A buffer large enough to hold the contents of any section. */
3577 /* A buffer large enough to hold the relocs of any section. */
3579 /* A buffer large enough to hold the symbol map of any input BFD. */
3581 /* A buffer large enough to hold output symbols of any input BFD. */
3582 struct external_nlist
*output_syms
;
3585 /* The function to create a new entry in the header file hash table. */
3587 static struct bfd_hash_entry
*
3588 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3589 struct bfd_hash_table
*table
,
3592 struct aout_link_includes_entry
*ret
=
3593 (struct aout_link_includes_entry
*) entry
;
3595 /* Allocate the structure if it has not already been allocated by a
3598 ret
= (struct aout_link_includes_entry
*)
3599 bfd_hash_allocate (table
, sizeof (* ret
));
3603 /* Call the allocation method of the superclass. */
3604 ret
= ((struct aout_link_includes_entry
*)
3605 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3608 /* Set local fields. */
3612 return (struct bfd_hash_entry
*) ret
;
3615 /* Write out a symbol that was not associated with an a.out input
3619 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3621 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3622 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3626 struct external_nlist outsym
;
3630 if (h
->root
.type
== bfd_link_hash_warning
)
3632 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3633 if (h
->root
.type
== bfd_link_hash_new
)
3637 output_bfd
= flaginfo
->output_bfd
;
3639 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3641 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3642 (output_bfd
, flaginfo
->info
, h
)))
3644 /* FIXME: No way to handle errors. */
3654 /* An indx of -2 means the symbol must be written. */
3656 && (flaginfo
->info
->strip
== strip_all
3657 || (flaginfo
->info
->strip
== strip_some
3658 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3659 false, false) == NULL
)))
3662 switch (h
->root
.type
)
3665 case bfd_link_hash_warning
:
3667 /* Avoid variable not initialized warnings. */
3669 case bfd_link_hash_new
:
3670 /* This can happen for set symbols when sets are not being
3673 case bfd_link_hash_undefined
:
3674 type
= N_UNDF
| N_EXT
;
3677 case bfd_link_hash_defined
:
3678 case bfd_link_hash_defweak
:
3682 sec
= h
->root
.u
.def
.section
->output_section
;
3683 BFD_ASSERT (bfd_is_abs_section (sec
)
3684 || sec
->owner
== output_bfd
);
3685 if (sec
== obj_textsec (output_bfd
))
3686 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3687 else if (sec
== obj_datasec (output_bfd
))
3688 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3689 else if (sec
== obj_bsssec (output_bfd
))
3690 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3692 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3694 val
= (h
->root
.u
.def
.value
3696 + h
->root
.u
.def
.section
->output_offset
);
3699 case bfd_link_hash_common
:
3700 type
= N_UNDF
| N_EXT
;
3701 val
= h
->root
.u
.c
.size
;
3703 case bfd_link_hash_undefweak
:
3707 case bfd_link_hash_indirect
:
3708 /* We ignore these symbols, since the indirected symbol is
3709 already in the hash table. */
3713 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3714 H_PUT_8 (output_bfd
, 0, outsym
.e_other
);
3715 H_PUT_16 (output_bfd
, 0, outsym
.e_desc
);
3716 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3718 if (indx
== - (bfd_size_type
) 1)
3719 /* FIXME: No way to handle errors. */
3722 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3723 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3725 amt
= EXTERNAL_NLIST_SIZE
;
3726 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3727 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3728 /* FIXME: No way to handle errors. */
3731 flaginfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
3732 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3733 ++obj_aout_external_sym_count (output_bfd
);
3738 /* Handle a link order which is supposed to generate a reloc. */
3741 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3743 struct bfd_link_order
*p
)
3745 struct bfd_link_order_reloc
*pr
;
3748 reloc_howto_type
*howto
;
3749 file_ptr
*reloff_ptr
= NULL
;
3750 struct reloc_std_external srel
;
3751 struct reloc_ext_external erel
;
3757 if (p
->type
== bfd_section_reloc_link_order
)
3760 if (bfd_is_abs_section (pr
->u
.section
))
3761 r_index
= N_ABS
| N_EXT
;
3764 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3765 r_index
= pr
->u
.section
->target_index
;
3770 struct aout_link_hash_entry
*h
;
3772 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3774 h
= ((struct aout_link_hash_entry
*)
3775 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3776 pr
->u
.name
, false, false, true));
3782 /* We decided to strip this symbol, but it turns out that we
3783 can't. Note that we lose the other and desc information
3784 here. I don't think that will ever matter for a global
3788 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3794 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3795 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3800 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3803 bfd_set_error (bfd_error_bad_value
);
3807 if (o
== obj_textsec (flaginfo
->output_bfd
))
3808 reloff_ptr
= &flaginfo
->treloff
;
3809 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3810 reloff_ptr
= &flaginfo
->dreloff
;
3814 if (obj_reloc_entry_size (flaginfo
->output_bfd
) == RELOC_STD_SIZE
)
3817 MY_put_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3825 unsigned int r_length
;
3827 r_pcrel
= (int) howto
->pc_relative
;
3828 r_baserel
= (howto
->type
& 8) != 0;
3829 r_jmptable
= (howto
->type
& 16) != 0;
3830 r_relative
= (howto
->type
& 32) != 0;
3831 r_length
= bfd_log2 (bfd_get_reloc_size (howto
));
3833 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3834 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3836 srel
.r_index
[0] = r_index
>> 16;
3837 srel
.r_index
[1] = r_index
>> 8;
3838 srel
.r_index
[2] = r_index
;
3840 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3841 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3842 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3843 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3844 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3845 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3849 srel
.r_index
[2] = r_index
>> 16;
3850 srel
.r_index
[1] = r_index
>> 8;
3851 srel
.r_index
[0] = r_index
;
3853 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3854 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3855 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3856 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3857 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3858 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3862 rel_ptr
= (void *) &srel
;
3864 /* We have to write the addend into the object file, since
3865 standard a.out relocs are in place. It would be more
3866 reliable if we had the current contents of the file here,
3867 rather than assuming zeroes, but we can't read the file since
3868 it was opened using bfd_openw. */
3869 if (pr
->addend
!= 0)
3872 bfd_reloc_status_type r
;
3876 size
= bfd_get_reloc_size (howto
);
3877 buf
= (bfd_byte
*) bfd_zmalloc (size
);
3878 if (buf
== NULL
&& size
!= 0)
3880 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3881 (bfd_vma
) pr
->addend
, buf
);
3887 case bfd_reloc_outofrange
:
3889 case bfd_reloc_overflow
:
3890 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3891 (flaginfo
->info
, NULL
,
3892 (p
->type
== bfd_section_reloc_link_order
3893 ? bfd_section_name (pr
->u
.section
)
3895 howto
->name
, pr
->addend
, NULL
, NULL
, (bfd_vma
) 0);
3898 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
, (void *) buf
,
3899 (file_ptr
) p
->offset
, size
);
3907 #ifdef MY_put_ext_reloc
3908 MY_put_ext_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
,
3909 howto
, &erel
, pr
->addend
);
3911 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, erel
.r_address
);
3913 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3915 erel
.r_index
[0] = r_index
>> 16;
3916 erel
.r_index
[1] = r_index
>> 8;
3917 erel
.r_index
[2] = r_index
;
3919 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
3920 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
3924 erel
.r_index
[2] = r_index
>> 16;
3925 erel
.r_index
[1] = r_index
>> 8;
3926 erel
.r_index
[0] = r_index
;
3928 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
3929 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
3932 PUT_WORD (flaginfo
->output_bfd
, (bfd_vma
) pr
->addend
, erel
.r_addend
);
3933 #endif /* MY_put_ext_reloc */
3935 rel_ptr
= (void *) &erel
;
3938 amt
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3939 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3940 || bfd_bwrite (rel_ptr
, amt
, flaginfo
->output_bfd
) != amt
)
3943 *reloff_ptr
+= obj_reloc_entry_size (flaginfo
->output_bfd
);
3945 /* Assert that the relocs have not run into the symbols, and that n
3946 the text relocs have not run into the data relocs. */
3947 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3948 && (reloff_ptr
!= &flaginfo
->treloff
3950 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3955 /* Get the section corresponding to a reloc index. */
3957 static inline asection
*
3958 aout_reloc_index_to_section (bfd
*abfd
, int indx
)
3960 switch (indx
& N_TYPE
)
3962 case N_TEXT
: return obj_textsec (abfd
);
3963 case N_DATA
: return obj_datasec (abfd
);
3964 case N_BSS
: return obj_bsssec (abfd
);
3966 case N_UNDF
: return bfd_abs_section_ptr
;
3972 /* Relocate an a.out section using standard a.out relocs. */
3975 aout_link_input_section_std (struct aout_final_link_info
*flaginfo
,
3977 asection
*input_section
,
3978 struct reloc_std_external
*relocs
,
3979 bfd_size_type rel_size
,
3982 bool (*check_dynamic_reloc
)
3983 (struct bfd_link_info
*, bfd
*, asection
*,
3984 struct aout_link_hash_entry
*, void *, bfd_byte
*, bool *, bfd_vma
*);
3987 struct external_nlist
*syms
;
3989 struct aout_link_hash_entry
**sym_hashes
;
3991 bfd_size_type reloc_count
;
3992 struct reloc_std_external
*rel
;
3993 struct reloc_std_external
*rel_end
;
3995 output_bfd
= flaginfo
->output_bfd
;
3996 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
3998 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
3999 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4000 == output_bfd
->xvec
->header_byteorder
);
4002 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4003 syms
= obj_aout_external_syms (input_bfd
);
4004 strings
= obj_aout_external_strings (input_bfd
);
4005 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4006 symbol_map
= flaginfo
->symbol_map
;
4008 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4010 rel_end
= rel
+ reloc_count
;
4011 for (; rel
< rel_end
; rel
++)
4014 unsigned int r_index
;
4018 reloc_howto_type
*howto
;
4019 struct aout_link_hash_entry
*h
= NULL
;
4021 bfd_reloc_status_type r
;
4023 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4025 #ifdef MY_reloc_howto
4026 howto
= MY_reloc_howto (input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
4032 unsigned int howto_idx
;
4034 if (bfd_header_big_endian (input_bfd
))
4036 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4037 | ((unsigned int) rel
->r_index
[1] << 8)
4039 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4040 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4041 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4042 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4043 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4044 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4045 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4049 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4050 | ((unsigned int) rel
->r_index
[1] << 8)
4052 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4053 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4054 r_baserel
= (0 != (rel
->r_type
[0]
4055 & RELOC_STD_BITS_BASEREL_LITTLE
));
4056 r_jmptable
= (0 != (rel
->r_type
[0]
4057 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4058 r_relative
= (0 != (rel
->r_type
[0]
4059 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4060 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4061 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4064 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4065 + 16 * r_jmptable
+ 32 * r_relative
);
4066 if (howto_idx
< TABLE_SIZE (howto_table_std
))
4067 howto
= howto_table_std
+ howto_idx
;
4075 _bfd_error_handler (_("%pB: unsupported relocation type"),
4077 bfd_set_error (bfd_error_bad_value
);
4083 /* We are generating a relocatable output file, and must
4084 modify the reloc accordingly. */
4087 /* If we know the symbol this relocation is against,
4088 convert it into a relocation against a section. This
4089 is what the native linker does. */
4090 h
= sym_hashes
[r_index
];
4092 && (h
->root
.type
== bfd_link_hash_defined
4093 || h
->root
.type
== bfd_link_hash_defweak
))
4095 asection
*output_section
;
4097 /* Change the r_extern value. */
4098 if (bfd_header_big_endian (output_bfd
))
4099 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4101 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4103 /* Compute a new r_index. */
4104 output_section
= h
->root
.u
.def
.section
->output_section
;
4105 if (output_section
== obj_textsec (output_bfd
))
4107 else if (output_section
== obj_datasec (output_bfd
))
4109 else if (output_section
== obj_bsssec (output_bfd
))
4114 /* Add the symbol value and the section VMA to the
4115 addend stored in the contents. */
4116 relocation
= (h
->root
.u
.def
.value
4117 + output_section
->vma
4118 + h
->root
.u
.def
.section
->output_offset
);
4122 /* We must change r_index according to the symbol
4124 r_index
= symbol_map
[r_index
];
4130 /* We decided to strip this symbol, but it
4131 turns out that we can't. Note that we
4132 lose the other and desc information here.
4133 I don't think that will ever matter for a
4139 if (!aout_link_write_other_symbol (&h
->root
.root
,
4149 name
= strings
+ GET_WORD (input_bfd
,
4150 syms
[r_index
].e_strx
);
4151 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4152 (flaginfo
->info
, name
,
4153 input_bfd
, input_section
, r_addr
);
4161 /* Write out the new r_index value. */
4162 if (bfd_header_big_endian (output_bfd
))
4164 rel
->r_index
[0] = r_index
>> 16;
4165 rel
->r_index
[1] = r_index
>> 8;
4166 rel
->r_index
[2] = r_index
;
4170 rel
->r_index
[2] = r_index
>> 16;
4171 rel
->r_index
[1] = r_index
>> 8;
4172 rel
->r_index
[0] = r_index
;
4179 /* This is a relocation against a section. We must
4180 adjust by the amount that the section moved. */
4181 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4182 relocation
= (section
->output_section
->vma
4183 + section
->output_offset
4187 /* Change the address of the relocation. */
4188 PUT_WORD (output_bfd
,
4189 r_addr
+ input_section
->output_offset
,
4192 /* Adjust a PC relative relocation by removing the reference
4193 to the original address in the section and including the
4194 reference to the new address. */
4196 relocation
-= (input_section
->output_section
->vma
4197 + input_section
->output_offset
4198 - input_section
->vma
);
4200 #ifdef MY_relocatable_reloc
4201 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4204 if (relocation
== 0)
4207 r
= MY_relocate_contents (howto
,
4208 input_bfd
, relocation
,
4215 /* We are generating an executable, and must do a full
4221 h
= sym_hashes
[r_index
];
4224 && (h
->root
.type
== bfd_link_hash_defined
4225 || h
->root
.type
== bfd_link_hash_defweak
))
4227 relocation
= (h
->root
.u
.def
.value
4228 + h
->root
.u
.def
.section
->output_section
->vma
4229 + h
->root
.u
.def
.section
->output_offset
);
4232 && h
->root
.type
== bfd_link_hash_undefweak
)
4244 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4245 relocation
= (section
->output_section
->vma
4246 + section
->output_offset
4249 relocation
+= input_section
->vma
;
4252 if (check_dynamic_reloc
!= NULL
)
4256 if (! ((*check_dynamic_reloc
)
4257 (flaginfo
->info
, input_bfd
, input_section
, h
,
4258 (void *) rel
, contents
, &skip
, &relocation
)))
4264 /* Now warn if a global symbol is undefined. We could not
4265 do this earlier, because check_dynamic_reloc might want
4266 to skip this reloc. */
4267 if (hundef
&& ! bfd_link_pic (flaginfo
->info
) && ! r_baserel
)
4272 name
= h
->root
.root
.string
;
4274 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4275 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4276 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, true);
4279 r
= MY_final_link_relocate (howto
,
4280 input_bfd
, input_section
,
4281 contents
, r_addr
, relocation
,
4285 if (r
!= bfd_reloc_ok
)
4290 case bfd_reloc_outofrange
:
4292 case bfd_reloc_overflow
:
4299 name
= strings
+ GET_WORD (input_bfd
,
4300 syms
[r_index
].e_strx
);
4305 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4306 name
= bfd_section_name (s
);
4308 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4309 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4310 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
4320 /* Relocate an a.out section using extended a.out relocs. */
4323 aout_link_input_section_ext (struct aout_final_link_info
*flaginfo
,
4325 asection
*input_section
,
4326 struct reloc_ext_external
*relocs
,
4327 bfd_size_type rel_size
,
4330 bool (*check_dynamic_reloc
)
4331 (struct bfd_link_info
*, bfd
*, asection
*,
4332 struct aout_link_hash_entry
*, void *, bfd_byte
*, bool *, bfd_vma
*);
4335 struct external_nlist
*syms
;
4337 struct aout_link_hash_entry
**sym_hashes
;
4339 bfd_size_type reloc_count
;
4340 struct reloc_ext_external
*rel
;
4341 struct reloc_ext_external
*rel_end
;
4343 output_bfd
= flaginfo
->output_bfd
;
4344 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4346 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4347 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4348 == output_bfd
->xvec
->header_byteorder
);
4350 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4351 syms
= obj_aout_external_syms (input_bfd
);
4352 strings
= obj_aout_external_strings (input_bfd
);
4353 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4354 symbol_map
= flaginfo
->symbol_map
;
4356 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4358 rel_end
= rel
+ reloc_count
;
4359 for (; rel
< rel_end
; rel
++)
4362 unsigned int r_index
;
4364 unsigned int r_type
;
4366 struct aout_link_hash_entry
*h
= NULL
;
4367 asection
*r_section
= NULL
;
4370 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4372 if (bfd_header_big_endian (input_bfd
))
4374 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4375 | ((unsigned int) rel
->r_index
[1] << 8)
4377 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4378 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4379 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4383 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4384 | ((unsigned int) rel
->r_index
[1] << 8)
4386 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4387 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4388 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4391 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4393 if (r_type
>= TABLE_SIZE (howto_table_ext
))
4395 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
4397 bfd_set_error (bfd_error_bad_value
);
4403 /* We are generating a relocatable output file, and must
4404 modify the reloc accordingly. */
4406 || r_type
== (unsigned int) RELOC_BASE10
4407 || r_type
== (unsigned int) RELOC_BASE13
4408 || r_type
== (unsigned int) RELOC_BASE22
)
4410 /* If we know the symbol this relocation is against,
4411 convert it into a relocation against a section. This
4412 is what the native linker does. */
4413 if (r_type
== (unsigned int) RELOC_BASE10
4414 || r_type
== (unsigned int) RELOC_BASE13
4415 || r_type
== (unsigned int) RELOC_BASE22
)
4418 h
= sym_hashes
[r_index
];
4420 && (h
->root
.type
== bfd_link_hash_defined
4421 || h
->root
.type
== bfd_link_hash_defweak
))
4423 asection
*output_section
;
4425 /* Change the r_extern value. */
4426 if (bfd_header_big_endian (output_bfd
))
4427 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4429 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4431 /* Compute a new r_index. */
4432 output_section
= h
->root
.u
.def
.section
->output_section
;
4433 if (output_section
== obj_textsec (output_bfd
))
4435 else if (output_section
== obj_datasec (output_bfd
))
4437 else if (output_section
== obj_bsssec (output_bfd
))
4442 /* Add the symbol value and the section VMA to the
4444 relocation
= (h
->root
.u
.def
.value
4445 + output_section
->vma
4446 + h
->root
.u
.def
.section
->output_offset
);
4448 /* Now RELOCATION is the VMA of the final
4449 destination. If this is a PC relative reloc,
4450 then ADDEND is the negative of the source VMA.
4451 We want to set ADDEND to the difference between
4452 the destination VMA and the source VMA, which
4453 means we must adjust RELOCATION by the change in
4454 the source VMA. This is done below. */
4458 /* We must change r_index according to the symbol
4460 r_index
= symbol_map
[r_index
];
4466 /* We decided to strip this symbol, but it
4467 turns out that we can't. Note that we
4468 lose the other and desc information here.
4469 I don't think that will ever matter for a
4475 if (!aout_link_write_other_symbol (&h
->root
.root
,
4485 name
= strings
+ GET_WORD (input_bfd
,
4486 syms
[r_index
].e_strx
);
4487 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4488 (flaginfo
->info
, name
,
4489 input_bfd
, input_section
, r_addr
);
4496 /* If this is a PC relative reloc, then the addend
4497 is the negative of the source VMA. We must
4498 adjust it by the change in the source VMA. This
4502 /* Write out the new r_index value. */
4503 if (bfd_header_big_endian (output_bfd
))
4505 rel
->r_index
[0] = r_index
>> 16;
4506 rel
->r_index
[1] = r_index
>> 8;
4507 rel
->r_index
[2] = r_index
;
4511 rel
->r_index
[2] = r_index
>> 16;
4512 rel
->r_index
[1] = r_index
>> 8;
4513 rel
->r_index
[0] = r_index
;
4518 /* This is a relocation against a section. We must
4519 adjust by the amount that the section moved. */
4520 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4521 relocation
= (r_section
->output_section
->vma
4522 + r_section
->output_offset
4525 /* If this is a PC relative reloc, then the addend is
4526 the difference in VMA between the destination and the
4527 source. We have just adjusted for the change in VMA
4528 of the destination, so we must also adjust by the
4529 change in VMA of the source. This is done below. */
4532 /* As described above, we must always adjust a PC relative
4533 reloc by the change in VMA of the source. However, if
4534 pcrel_offset is set, then the addend does not include the
4535 location within the section, in which case we don't need
4536 to adjust anything. */
4537 if (howto_table_ext
[r_type
].pc_relative
4538 && ! howto_table_ext
[r_type
].pcrel_offset
)
4539 relocation
-= (input_section
->output_section
->vma
4540 + input_section
->output_offset
4541 - input_section
->vma
);
4543 /* Change the addend if necessary. */
4544 if (relocation
!= 0)
4545 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4547 /* Change the address of the relocation. */
4548 PUT_WORD (output_bfd
,
4549 r_addr
+ input_section
->output_offset
,
4555 bfd_reloc_status_type r
;
4557 /* We are generating an executable, and must do a full
4563 h
= sym_hashes
[r_index
];
4566 && (h
->root
.type
== bfd_link_hash_defined
4567 || h
->root
.type
== bfd_link_hash_defweak
))
4569 relocation
= (h
->root
.u
.def
.value
4570 + h
->root
.u
.def
.section
->output_section
->vma
4571 + h
->root
.u
.def
.section
->output_offset
);
4574 && h
->root
.type
== bfd_link_hash_undefweak
)
4582 else if (r_type
== (unsigned int) RELOC_BASE10
4583 || r_type
== (unsigned int) RELOC_BASE13
4584 || r_type
== (unsigned int) RELOC_BASE22
)
4586 struct external_nlist
*sym
;
4589 /* For base relative relocs, r_index is always an index
4590 into the symbol table, even if r_extern is 0. */
4591 sym
= syms
+ r_index
;
4592 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4593 if ((type
& N_TYPE
) == N_TEXT
4595 r_section
= obj_textsec (input_bfd
);
4596 else if ((type
& N_TYPE
) == N_DATA
4598 r_section
= obj_datasec (input_bfd
);
4599 else if ((type
& N_TYPE
) == N_BSS
4601 r_section
= obj_bsssec (input_bfd
);
4602 else if ((type
& N_TYPE
) == N_ABS
4604 r_section
= bfd_abs_section_ptr
;
4607 relocation
= (r_section
->output_section
->vma
4608 + r_section
->output_offset
4609 + (GET_WORD (input_bfd
, sym
->e_value
)
4614 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4616 /* If this is a PC relative reloc, then R_ADDEND is the
4617 difference between the two vmas, or
4618 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4620 old_dest_sec == section->vma
4622 old_src_sec == input_section->vma
4624 old_src_off == r_addr
4626 _bfd_final_link_relocate expects RELOCATION +
4627 R_ADDEND to be the VMA of the destination minus
4628 r_addr (the minus r_addr is because this relocation
4629 is not pcrel_offset, which is a bit confusing and
4630 should, perhaps, be changed), or
4633 new_dest_sec == output_section->vma + output_offset
4634 We arrange for this to happen by setting RELOCATION to
4635 new_dest_sec + old_src_sec - old_dest_sec
4637 If this is not a PC relative reloc, then R_ADDEND is
4638 simply the VMA of the destination, so we set
4639 RELOCATION to the change in the destination VMA, or
4640 new_dest_sec - old_dest_sec
4642 relocation
= (r_section
->output_section
->vma
4643 + r_section
->output_offset
4645 if (howto_table_ext
[r_type
].pc_relative
)
4646 relocation
+= input_section
->vma
;
4649 if (check_dynamic_reloc
!= NULL
)
4653 if (! ((*check_dynamic_reloc
)
4654 (flaginfo
->info
, input_bfd
, input_section
, h
,
4655 (void *) rel
, contents
, &skip
, &relocation
)))
4661 /* Now warn if a global symbol is undefined. We could not
4662 do this earlier, because check_dynamic_reloc might want
4663 to skip this reloc. */
4665 && ! bfd_link_pic (flaginfo
->info
)
4666 && r_type
!= (unsigned int) RELOC_BASE10
4667 && r_type
!= (unsigned int) RELOC_BASE13
4668 && r_type
!= (unsigned int) RELOC_BASE22
)
4673 name
= h
->root
.root
.string
;
4675 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4676 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4677 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, true);
4680 if (r_type
!= (unsigned int) RELOC_SPARC_REV32
)
4681 r
= MY_final_link_relocate (howto_table_ext
+ r_type
,
4682 input_bfd
, input_section
,
4683 contents
, r_addr
, relocation
,
4689 x
= bfd_get_32 (input_bfd
, contents
+ r_addr
);
4690 x
= x
+ relocation
+ r_addend
;
4691 bfd_putl32 (/*input_bfd,*/ x
, contents
+ r_addr
);
4695 if (r
!= bfd_reloc_ok
)
4700 case bfd_reloc_outofrange
:
4702 case bfd_reloc_overflow
:
4709 || r_type
== (unsigned int) RELOC_BASE10
4710 || r_type
== (unsigned int) RELOC_BASE13
4711 || r_type
== (unsigned int) RELOC_BASE22
)
4712 name
= strings
+ GET_WORD (input_bfd
,
4713 syms
[r_index
].e_strx
);
4718 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4719 name
= bfd_section_name (s
);
4721 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4722 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
,
4723 howto_table_ext
[r_type
].name
,
4724 r_addend
, input_bfd
, input_section
, r_addr
);
4735 /* Link an a.out section into the output file. */
4738 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
4740 asection
*input_section
,
4741 file_ptr
*reloff_ptr
,
4742 bfd_size_type rel_size
)
4744 bfd_size_type input_size
;
4747 /* Get the section contents. */
4748 input_size
= input_section
->size
;
4749 if (! bfd_get_section_contents (input_bfd
, input_section
,
4750 (void *) flaginfo
->contents
,
4751 (file_ptr
) 0, input_size
))
4754 /* Read in the relocs if we haven't already done it. */
4755 if (aout_section_data (input_section
) != NULL
4756 && aout_section_data (input_section
)->relocs
!= NULL
)
4757 relocs
= aout_section_data (input_section
)->relocs
;
4760 relocs
= flaginfo
->relocs
;
4763 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4764 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
4769 /* Relocate the section contents. */
4770 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4772 if (! aout_link_input_section_std (flaginfo
, input_bfd
, input_section
,
4773 (struct reloc_std_external
*) relocs
,
4774 rel_size
, flaginfo
->contents
))
4779 if (! aout_link_input_section_ext (flaginfo
, input_bfd
, input_section
,
4780 (struct reloc_ext_external
*) relocs
,
4781 rel_size
, flaginfo
->contents
))
4785 /* Write out the section contents. */
4786 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
4787 input_section
->output_section
,
4788 (void *) flaginfo
->contents
,
4789 (file_ptr
) input_section
->output_offset
,
4793 /* If we are producing relocatable output, the relocs were
4794 modified, and we now write them out. */
4795 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
4797 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4799 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
4801 *reloff_ptr
+= rel_size
;
4803 /* Assert that the relocs have not run into the symbols, and
4804 that if these are the text relocs they have not run into the
4806 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
4807 && (reloff_ptr
!= &flaginfo
->treloff
4809 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
4815 /* Adjust and write out the symbols for an a.out file. Set the new
4816 symbol indices into a symbol_map. */
4819 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4822 bfd_size_type sym_count
;
4824 enum bfd_link_strip strip
;
4825 enum bfd_link_discard discard
;
4826 struct external_nlist
*outsym
;
4827 bfd_size_type strtab_index
;
4828 struct external_nlist
*sym
;
4829 struct external_nlist
*sym_end
;
4830 struct aout_link_hash_entry
**sym_hash
;
4835 output_bfd
= flaginfo
->output_bfd
;
4836 sym_count
= obj_aout_external_sym_count (input_bfd
);
4837 strings
= obj_aout_external_strings (input_bfd
);
4838 strip
= flaginfo
->info
->strip
;
4839 discard
= flaginfo
->info
->discard
;
4840 outsym
= flaginfo
->output_syms
;
4842 /* First write out a symbol for this object file, unless we are
4843 discarding such symbols. */
4844 if (strip
!= strip_all
4845 && (strip
!= strip_some
4846 || bfd_hash_lookup (flaginfo
->info
->keep_hash
,
4847 bfd_get_filename (input_bfd
),
4848 false, false) != NULL
)
4849 && discard
!= discard_all
)
4851 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4852 H_PUT_8 (output_bfd
, 0, outsym
->e_other
);
4853 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4854 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4855 bfd_get_filename (input_bfd
), false);
4856 if (strtab_index
== (bfd_size_type
) -1)
4858 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4859 PUT_WORD (output_bfd
,
4860 (bfd_section_vma (obj_textsec (input_bfd
)->output_section
)
4861 + obj_textsec (input_bfd
)->output_offset
),
4863 ++obj_aout_external_sym_count (output_bfd
);
4869 sym
= obj_aout_external_syms (input_bfd
);
4870 sym_end
= sym
+ sym_count
;
4871 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4872 symbol_map
= flaginfo
->symbol_map
;
4873 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4874 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4878 struct aout_link_hash_entry
*h
;
4884 /* We set *symbol_map to 0 above for all symbols. If it has
4885 already been set to -1 for this symbol, it means that we are
4886 discarding it because it appears in a duplicate header file.
4887 See the N_BINCL code below. */
4888 if (*symbol_map
== -1)
4891 /* Initialize *symbol_map to -1, which means that the symbol was
4892 not copied into the output file. We will change it later if
4893 we do copy the symbol over. */
4896 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4897 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4903 /* Pass this symbol through. It is the target of an
4904 indirect or warning symbol. */
4905 val
= GET_WORD (input_bfd
, sym
->e_value
);
4910 /* Skip this symbol, which is the target of an indirect
4911 symbol that we have changed to no longer be an indirect
4918 struct aout_link_hash_entry
*hresolve
;
4920 /* We have saved the hash table entry for this symbol, if
4921 there is one. Note that we could just look it up again
4922 in the hash table, provided we first check that it is an
4926 /* Use the name from the hash table, in case the symbol was
4929 && h
->root
.type
!= bfd_link_hash_warning
)
4930 name
= h
->root
.root
.string
;
4932 /* If this is an indirect or warning symbol, then change
4933 hresolve to the base symbol. We also change *sym_hash so
4934 that the relocation routines relocate against the real
4937 if (h
!= (struct aout_link_hash_entry
*) NULL
4938 && (h
->root
.type
== bfd_link_hash_indirect
4939 || h
->root
.type
== bfd_link_hash_warning
))
4941 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4942 while (hresolve
->root
.type
== bfd_link_hash_indirect
4943 || hresolve
->root
.type
== bfd_link_hash_warning
)
4944 hresolve
= ((struct aout_link_hash_entry
*)
4945 hresolve
->root
.u
.i
.link
);
4946 *sym_hash
= hresolve
;
4949 /* If the symbol has already been written out, skip it. */
4953 if ((type
& N_TYPE
) == N_INDR
4954 || type
== N_WARNING
)
4956 *symbol_map
= h
->indx
;
4960 /* See if we are stripping this symbol. */
4966 case strip_debugger
:
4967 if ((type
& N_STAB
) != 0)
4971 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
, false, false)
4986 /* Get the value of the symbol. */
4987 if ((type
& N_TYPE
) == N_TEXT
4989 symsec
= obj_textsec (input_bfd
);
4990 else if ((type
& N_TYPE
) == N_DATA
4992 symsec
= obj_datasec (input_bfd
);
4993 else if ((type
& N_TYPE
) == N_BSS
4995 symsec
= obj_bsssec (input_bfd
);
4996 else if ((type
& N_TYPE
) == N_ABS
4998 symsec
= bfd_abs_section_ptr
;
4999 else if (((type
& N_TYPE
) == N_INDR
5000 && (hresolve
== NULL
5001 || (hresolve
->root
.type
!= bfd_link_hash_defined
5002 && hresolve
->root
.type
!= bfd_link_hash_defweak
5003 && hresolve
->root
.type
!= bfd_link_hash_common
)))
5004 || type
== N_WARNING
)
5006 /* Pass the next symbol through unchanged. The
5007 condition above for indirect symbols is so that if
5008 the indirect symbol was defined, we output it with
5009 the correct definition so the debugger will
5012 val
= GET_WORD (input_bfd
, sym
->e_value
);
5015 else if ((type
& N_STAB
) != 0)
5017 val
= GET_WORD (input_bfd
, sym
->e_value
);
5022 /* If we get here with an indirect symbol, it means that
5023 we are outputting it with a real definition. In such
5024 a case we do not want to output the next symbol,
5025 which is the target of the indirection. */
5026 if ((type
& N_TYPE
) == N_INDR
)
5031 /* We need to get the value from the hash table. We use
5032 hresolve so that if we have defined an indirect
5033 symbol we output the final definition. */
5036 switch (type
& N_TYPE
)
5039 symsec
= obj_textsec (input_bfd
);
5042 symsec
= obj_datasec (input_bfd
);
5045 symsec
= obj_bsssec (input_bfd
);
5048 symsec
= bfd_abs_section_ptr
;
5055 else if (hresolve
->root
.type
== bfd_link_hash_defined
5056 || hresolve
->root
.type
== bfd_link_hash_defweak
)
5058 asection
*input_section
;
5059 asection
*output_section
;
5061 /* This case usually means a common symbol which was
5062 turned into a defined symbol. */
5063 input_section
= hresolve
->root
.u
.def
.section
;
5064 output_section
= input_section
->output_section
;
5065 BFD_ASSERT (bfd_is_abs_section (output_section
)
5066 || output_section
->owner
== output_bfd
);
5067 val
= (hresolve
->root
.u
.def
.value
5068 + bfd_section_vma (output_section
)
5069 + input_section
->output_offset
);
5071 /* Get the correct type based on the section. If
5072 this is a constructed set, force it to be
5073 globally visible. */
5082 if (output_section
== obj_textsec (output_bfd
))
5083 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5086 else if (output_section
== obj_datasec (output_bfd
))
5087 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5090 else if (output_section
== obj_bsssec (output_bfd
))
5091 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5095 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5099 else if (hresolve
->root
.type
== bfd_link_hash_common
)
5100 val
= hresolve
->root
.u
.c
.size
;
5101 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
5110 val
= (symsec
->output_section
->vma
5111 + symsec
->output_offset
5112 + (GET_WORD (input_bfd
, sym
->e_value
)
5115 /* If this is a global symbol set the written flag, and if
5116 it is a local symbol see if we should discard it. */
5120 h
->indx
= obj_aout_external_sym_count (output_bfd
);
5122 else if ((type
& N_TYPE
) != N_SETT
5123 && (type
& N_TYPE
) != N_SETD
5124 && (type
& N_TYPE
) != N_SETB
5125 && (type
& N_TYPE
) != N_SETA
)
5130 case discard_sec_merge
:
5133 if ((type
& N_STAB
) == 0
5134 && bfd_is_local_label_name (input_bfd
, name
))
5148 /* An N_BINCL symbol indicates the start of the stabs
5149 entries for a header file. We need to scan ahead to the
5150 next N_EINCL symbol, ignoring nesting, adding up all the
5151 characters in the symbol names, not including the file
5152 numbers in types (the first number after an open
5154 if (type
== (int) N_BINCL
)
5156 struct external_nlist
*incl_sym
;
5158 struct aout_link_includes_entry
*incl_entry
;
5159 struct aout_link_includes_totals
*t
;
5163 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
5167 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5168 if (incl_type
== (int) N_EINCL
)
5174 else if (incl_type
== (int) N_BINCL
)
5180 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
5181 for (; *s
!= '\0'; s
++)
5186 /* Skip the file number. */
5188 while (ISDIGIT (*s
))
5196 /* If we have already included a header file with the
5197 same value, then replace this one with an N_EXCL
5199 copy
= !flaginfo
->info
->keep_memory
;
5200 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
5202 if (incl_entry
== NULL
)
5204 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
5205 if (t
->total
== val
)
5209 /* This is the first time we have seen this header
5210 file with this set of stabs strings. */
5211 t
= (struct aout_link_includes_totals
*)
5212 bfd_hash_allocate (&flaginfo
->includes
.root
,
5217 t
->next
= incl_entry
->totals
;
5218 incl_entry
->totals
= t
;
5224 /* This is a duplicate header file. We must change
5225 it to be an N_EXCL entry, and mark all the
5226 included symbols to prevent outputting them. */
5227 type
= (int) N_EXCL
;
5230 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
5232 incl_sym
++, incl_map
++)
5236 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5237 if (incl_type
== (int) N_EINCL
)
5246 else if (incl_type
== (int) N_BINCL
)
5255 /* Copy this symbol into the list of symbols we are going to
5257 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
5258 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_other
), outsym
->e_other
);
5259 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
5261 if (! flaginfo
->info
->keep_memory
)
5263 /* name points into a string table which we are going to
5264 free. If there is a hash table entry, use that string.
5265 Otherwise, copy name into memory. */
5267 name
= h
->root
.root
.string
;
5271 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
5273 if (strtab_index
== (bfd_size_type
) -1)
5275 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
5276 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
5277 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
5278 ++obj_aout_external_sym_count (output_bfd
);
5282 /* Write out the output symbols we have just constructed. */
5283 if (outsym
> flaginfo
->output_syms
)
5285 bfd_size_type outsym_size
;
5287 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
5289 outsym_size
= outsym
- flaginfo
->output_syms
;
5290 outsym_size
*= EXTERNAL_NLIST_SIZE
;
5291 if (bfd_bwrite ((void *) flaginfo
->output_syms
, outsym_size
, output_bfd
)
5294 flaginfo
->symoff
+= outsym_size
;
5300 /* Link an a.out input BFD into the output file. */
5303 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
5305 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
5307 /* If this is a dynamic object, it may need special handling. */
5308 if ((input_bfd
->flags
& DYNAMIC
) != 0
5309 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
5310 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
5311 (flaginfo
->info
, input_bfd
));
5313 /* Get the symbols. We probably have them already, unless
5314 flaginfo->info->keep_memory is FALSE. */
5315 if (! aout_get_external_symbols (input_bfd
))
5318 /* Write out the symbols and get a map of the new indices. The map
5319 is placed into flaginfo->symbol_map. */
5320 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
5323 /* Relocate and write out the sections. These functions use the
5324 symbol map created by aout_link_write_symbols. The linker_mark
5325 field will be set if these sections are to be included in the
5326 link, which will normally be the case. */
5327 if (obj_textsec (input_bfd
)->linker_mark
)
5329 if (! aout_link_input_section (flaginfo
, input_bfd
,
5330 obj_textsec (input_bfd
),
5332 exec_hdr (input_bfd
)->a_trsize
))
5335 if (obj_datasec (input_bfd
)->linker_mark
)
5337 if (! aout_link_input_section (flaginfo
, input_bfd
,
5338 obj_datasec (input_bfd
),
5340 exec_hdr (input_bfd
)->a_drsize
))
5344 /* If we are not keeping memory, we don't need the symbols any
5345 longer. We still need them if we are keeping memory, because the
5346 strings in the hash table point into them. */
5347 if (! flaginfo
->info
->keep_memory
)
5349 if (! aout_link_free_symbols (input_bfd
))
5356 /* Do the final link step. This is called on the output BFD. The
5357 INFO structure should point to a list of BFDs linked through the
5358 link.next field which can be used to find each BFD which takes part
5359 in the output. Also, each section in ABFD should point to a list
5360 of bfd_link_order structures which list all the input sections for
5361 the output section. */
5364 NAME (aout
, final_link
) (bfd
*abfd
,
5365 struct bfd_link_info
*info
,
5366 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
5368 struct aout_final_link_info aout_info
;
5369 bool includes_hash_initialized
= false;
5371 bfd_size_type trsize
, drsize
;
5372 bfd_size_type max_contents_size
;
5373 bfd_size_type max_relocs_size
;
5374 bfd_size_type max_sym_count
;
5375 struct bfd_link_order
*p
;
5377 bool have_link_order_relocs
;
5379 if (bfd_link_pic (info
))
5380 abfd
->flags
|= DYNAMIC
;
5382 aout_info
.info
= info
;
5383 aout_info
.output_bfd
= abfd
;
5384 aout_info
.contents
= NULL
;
5385 aout_info
.relocs
= NULL
;
5386 aout_info
.symbol_map
= NULL
;
5387 aout_info
.output_syms
= NULL
;
5389 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
5390 aout_link_includes_newfunc
,
5391 sizeof (struct aout_link_includes_entry
),
5394 includes_hash_initialized
= true;
5396 /* Figure out the largest section size. Also, if generating
5397 relocatable output, count the relocs. */
5400 max_contents_size
= 0;
5401 max_relocs_size
= 0;
5403 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5407 if (bfd_link_relocatable (info
))
5409 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5411 trsize
+= exec_hdr (sub
)->a_trsize
;
5412 drsize
+= exec_hdr (sub
)->a_drsize
;
5416 /* FIXME: We need to identify the .text and .data sections
5417 and call get_reloc_upper_bound and canonicalize_reloc to
5418 work out the number of relocs needed, and then multiply
5419 by the reloc size. */
5421 /* xgettext:c-format */
5422 (_("%pB: relocatable link from %s to %s not supported"),
5423 abfd
, sub
->xvec
->name
, abfd
->xvec
->name
);
5424 bfd_set_error (bfd_error_invalid_operation
);
5429 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5431 sz
= obj_textsec (sub
)->size
;
5432 if (sz
> max_contents_size
)
5433 max_contents_size
= sz
;
5434 sz
= obj_datasec (sub
)->size
;
5435 if (sz
> max_contents_size
)
5436 max_contents_size
= sz
;
5438 sz
= exec_hdr (sub
)->a_trsize
;
5439 if (sz
> max_relocs_size
)
5440 max_relocs_size
= sz
;
5441 sz
= exec_hdr (sub
)->a_drsize
;
5442 if (sz
> max_relocs_size
)
5443 max_relocs_size
= sz
;
5445 sz
= obj_aout_external_sym_count (sub
);
5446 if (sz
> max_sym_count
)
5451 if (bfd_link_relocatable (info
))
5453 if (obj_textsec (abfd
) != NULL
)
5454 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
5455 ->map_head
.link_order
)
5456 * obj_reloc_entry_size (abfd
));
5457 if (obj_datasec (abfd
) != NULL
)
5458 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
5459 ->map_head
.link_order
)
5460 * obj_reloc_entry_size (abfd
));
5463 exec_hdr (abfd
)->a_trsize
= trsize
;
5464 exec_hdr (abfd
)->a_drsize
= drsize
;
5466 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
5468 /* Adjust the section sizes and vmas according to the magic number.
5469 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5470 filepos for each section. */
5471 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
5474 /* The relocation and symbol file positions differ among a.out
5475 targets. We are passed a callback routine from the backend
5476 specific code to handle this.
5477 FIXME: At this point we do not know how much space the symbol
5478 table will require. This will not work for any (nonstandard)
5479 a.out target that needs to know the symbol table size before it
5480 can compute the relocation file positions. */
5481 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
5483 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
5484 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
5485 obj_sym_filepos (abfd
) = aout_info
.symoff
;
5487 /* We keep a count of the symbols as we output them. */
5488 obj_aout_external_sym_count (abfd
) = 0;
5490 /* We accumulate the string table as we write out the symbols. */
5491 aout_info
.strtab
= _bfd_stringtab_init ();
5492 if (aout_info
.strtab
== NULL
)
5495 /* Allocate buffers to hold section contents and relocs. */
5496 aout_info
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5497 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
5498 aout_info
.symbol_map
= (int *) bfd_malloc (max_sym_count
* sizeof (int));
5499 aout_info
.output_syms
= (struct external_nlist
*)
5500 bfd_malloc ((max_sym_count
+ 1) * sizeof (struct external_nlist
));
5501 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
5502 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
5503 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
5504 || aout_info
.output_syms
== NULL
)
5507 /* If we have a symbol named __DYNAMIC, force it out now. This is
5508 required by SunOS. Doing this here rather than in sunos.c is a
5509 hack, but it's easier than exporting everything which would be
5512 struct aout_link_hash_entry
*h
;
5514 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
5515 false, false, false);
5517 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
5520 /* The most time efficient way to do the link would be to read all
5521 the input object files into memory and then sort out the
5522 information into the output file. Unfortunately, that will
5523 probably use too much memory. Another method would be to step
5524 through everything that composes the text section and write it
5525 out, and then everything that composes the data section and write
5526 it out, and then write out the relocs, and then write out the
5527 symbols. Unfortunately, that requires reading stuff from each
5528 input file several times, and we will not be able to keep all the
5529 input files open simultaneously, and reopening them will be slow.
5531 What we do is basically process one input file at a time. We do
5532 everything we need to do with an input file once--copy over the
5533 section contents, handle the relocation information, and write
5534 out the symbols--and then we throw away the information we read
5535 from it. This approach requires a lot of lseeks of the output
5536 file, which is unfortunate but still faster than reopening a lot
5539 We use the output_has_begun field of the input BFDs to see
5540 whether we have already handled it. */
5541 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5542 sub
->output_has_begun
= false;
5544 /* Mark all sections which are to be included in the link. This
5545 will normally be every section. We need to do this so that we
5546 can identify any sections which the linker has decided to not
5548 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5550 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5551 if (p
->type
== bfd_indirect_link_order
)
5552 p
->u
.indirect
.section
->linker_mark
= true;
5555 have_link_order_relocs
= false;
5556 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5558 for (p
= o
->map_head
.link_order
;
5562 if (p
->type
== bfd_indirect_link_order
5563 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
5564 == bfd_target_aout_flavour
))
5568 input_bfd
= p
->u
.indirect
.section
->owner
;
5569 if (! input_bfd
->output_has_begun
)
5571 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
5573 input_bfd
->output_has_begun
= true;
5576 else if (p
->type
== bfd_section_reloc_link_order
5577 || p
->type
== bfd_symbol_reloc_link_order
)
5579 /* These are handled below. */
5580 have_link_order_relocs
= true;
5584 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5590 /* Write out any symbols that we have not already written out. */
5591 bfd_hash_traverse (&info
->hash
->table
,
5592 aout_link_write_other_symbol
,
5595 /* Now handle any relocs we were asked to create by the linker.
5596 These did not come from any input file. We must do these after
5597 we have written out all the symbols, so that we know the symbol
5599 if (have_link_order_relocs
)
5601 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5603 for (p
= o
->map_head
.link_order
;
5607 if (p
->type
== bfd_section_reloc_link_order
5608 || p
->type
== bfd_symbol_reloc_link_order
)
5610 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
5617 free (aout_info
.contents
);
5618 aout_info
.contents
= NULL
;
5619 free (aout_info
.relocs
);
5620 aout_info
.relocs
= NULL
;
5621 free (aout_info
.symbol_map
);
5622 aout_info
.symbol_map
= NULL
;
5623 free (aout_info
.output_syms
);
5624 aout_info
.output_syms
= NULL
;
5626 if (includes_hash_initialized
)
5628 bfd_hash_table_free (&aout_info
.includes
.root
);
5629 includes_hash_initialized
= false;
5632 /* Finish up any dynamic linking we may be doing. */
5633 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
5635 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
5639 /* Update the header information. */
5640 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
5641 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
5642 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
5643 obj_textsec (abfd
)->reloc_count
=
5644 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
5645 obj_datasec (abfd
)->reloc_count
=
5646 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
5648 /* Write out the string table, unless there are no symbols. */
5649 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
5651 if (abfd
->symcount
> 0)
5653 if (!emit_stringtab (abfd
, aout_info
.strtab
))
5658 bfd_byte b
[BYTES_IN_WORD
];
5660 memset (b
, 0, BYTES_IN_WORD
);
5661 if (bfd_bwrite (b
, (bfd_size_type
) BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
5668 free (aout_info
.contents
);
5669 free (aout_info
.relocs
);
5670 free (aout_info
.symbol_map
);
5671 free (aout_info
.output_syms
);
5672 if (includes_hash_initialized
)
5673 bfd_hash_table_free (&aout_info
.includes
.root
);