1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2017 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, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sparc_aout_sunos_be_vec
72 requires all the names from @file{aout32.c}, and produces the jump vector
74 | sparc_aout_sunos_be_vec
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
86 When porting it to run on a new system, you must supply:
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected. */
110 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
111 Doesn't matter what the setting of WP_TEXT is on output, but it'll
113 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
114 * Any BFD with both flags clear is OMAGIC.
115 (Just want to make these explicit, so the conditions tested in this
116 file make sense if you're more familiar with a.out than with BFD.) */
118 #define KEEPIT udata.i
122 #include "safe-ctype.h"
127 #include "aout/aout64.h"
128 #include "aout/stab_gnu.h"
136 The file @file{aoutx.h} provides for both the @emph{standard}
137 and @emph{extended} forms of a.out relocation records.
139 The standard records contain only an
140 address, a symbol index, and a type field. The extended records
141 (used on 29ks and sparcs) also have a full integer for an
144 #ifndef CTOR_TABLE_RELOC_HOWTO
145 #define CTOR_TABLE_RELOC_IDX 2
146 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
147 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
148 ? howto_table_ext : howto_table_std) \
149 + CTOR_TABLE_RELOC_IDX)
152 #ifndef MY_swap_std_reloc_in
153 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
156 #ifndef MY_swap_ext_reloc_in
157 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
160 #ifndef MY_swap_std_reloc_out
161 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
164 #ifndef MY_swap_ext_reloc_out
165 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
168 #ifndef MY_final_link_relocate
169 #define MY_final_link_relocate _bfd_final_link_relocate
172 #ifndef MY_relocate_contents
173 #define MY_relocate_contents _bfd_relocate_contents
176 #define howto_table_ext NAME (aout, ext_howto_table)
177 #define howto_table_std NAME (aout, std_howto_table)
179 reloc_howto_type howto_table_ext
[] =
181 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
182 HOWTO (RELOC_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
, 0, "8", FALSE
, 0, 0x000000ff, FALSE
),
183 HOWTO (RELOC_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
, 0, "16", FALSE
, 0, 0x0000ffff, FALSE
),
184 HOWTO (RELOC_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "32", FALSE
, 0, 0xffffffff, FALSE
),
185 HOWTO (RELOC_DISP8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0, "DISP8", FALSE
, 0, 0x000000ff, FALSE
),
186 HOWTO (RELOC_DISP16
, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0, "DISP16", FALSE
, 0, 0x0000ffff, FALSE
),
187 HOWTO (RELOC_DISP32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0, "DISP32", FALSE
, 0, 0xffffffff, FALSE
),
188 HOWTO (RELOC_WDISP30
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "WDISP30", FALSE
, 0, 0x3fffffff, FALSE
),
189 HOWTO (RELOC_WDISP22
, 2, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "WDISP22", FALSE
, 0, 0x003fffff, FALSE
),
190 HOWTO (RELOC_HI22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "HI22", FALSE
, 0, 0x003fffff, FALSE
),
191 HOWTO (RELOC_22
, 0, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "22", FALSE
, 0, 0x003fffff, FALSE
),
192 HOWTO (RELOC_13
, 0, 2, 13, FALSE
, 0, complain_overflow_bitfield
, 0, "13", FALSE
, 0, 0x00001fff, FALSE
),
193 HOWTO (RELOC_LO10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "LO10", FALSE
, 0, 0x000003ff, FALSE
),
194 HOWTO (RELOC_SFA_BASE
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_BASE", FALSE
, 0, 0xffffffff, FALSE
),
195 HOWTO (RELOC_SFA_OFF13
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_OFF13", FALSE
, 0, 0xffffffff, FALSE
),
196 HOWTO (RELOC_BASE10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "BASE10", FALSE
, 0, 0x000003ff, FALSE
),
197 HOWTO (RELOC_BASE13
, 0, 2, 13, FALSE
, 0, complain_overflow_signed
, 0, "BASE13", FALSE
, 0, 0x00001fff, FALSE
),
198 HOWTO (RELOC_BASE22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "BASE22", FALSE
, 0, 0x003fffff, FALSE
),
199 HOWTO (RELOC_PC10
, 0, 2, 10, TRUE
, 0, complain_overflow_dont
, 0, "PC10", FALSE
, 0, 0x000003ff, TRUE
),
200 HOWTO (RELOC_PC22
, 10, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "PC22", FALSE
, 0, 0x003fffff, TRUE
),
201 HOWTO (RELOC_JMP_TBL
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "JMP_TBL", FALSE
, 0, 0x3fffffff, FALSE
),
202 HOWTO (RELOC_SEGOFF16
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "SEGOFF16", FALSE
, 0, 0x00000000, FALSE
),
203 HOWTO (RELOC_GLOB_DAT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "GLOB_DAT", FALSE
, 0, 0x00000000, FALSE
),
204 HOWTO (RELOC_JMP_SLOT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "JMP_SLOT", FALSE
, 0, 0x00000000, FALSE
),
205 HOWTO (RELOC_RELATIVE
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "RELATIVE", FALSE
, 0, 0x00000000, FALSE
),
206 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
207 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
208 #define RELOC_SPARC_REV32 RELOC_WDISP19
209 HOWTO (RELOC_SPARC_REV32
, 0, 2, 32, FALSE
, 0, complain_overflow_dont
, 0,"R_SPARC_REV32",FALSE
, 0, 0xffffffff, FALSE
),
212 /* Convert standard reloc records to "arelent" format (incl byte swap). */
214 reloc_howto_type howto_table_std
[] =
216 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
217 HOWTO ( 0, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,0,"8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
218 HOWTO ( 1, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
219 HOWTO ( 2, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
220 HOWTO ( 3, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,0,"64", TRUE
, 0xdeaddead,0xdeaddead, FALSE
),
221 HOWTO ( 4, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0,"DISP8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
222 HOWTO ( 5, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0,"DISP16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
223 HOWTO ( 6, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0,"DISP32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
224 HOWTO ( 7, 0, 4, 64, TRUE
, 0, complain_overflow_signed
, 0,"DISP64", TRUE
, 0xfeedface,0xfeedface, FALSE
),
225 HOWTO ( 8, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"GOT_REL", FALSE
, 0,0x00000000, FALSE
),
226 HOWTO ( 9, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"BASE16", FALSE
,0xffffffff,0xffffffff, FALSE
),
227 HOWTO (10, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"BASE32", FALSE
,0xffffffff,0xffffffff, FALSE
),
233 HOWTO (16, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"JMP_TABLE", FALSE
, 0,0x00000000, FALSE
),
249 HOWTO (32, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"RELATIVE", FALSE
, 0,0x00000000, FALSE
),
257 HOWTO (40, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"BASEREL", FALSE
, 0,0x00000000, FALSE
),
260 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
263 NAME (aout
, reloc_type_lookup
) (bfd
*abfd
, bfd_reloc_code_real_type code
)
265 #define EXT(i, j) case i: return & howto_table_ext [j]
266 #define STD(i, j) case i: return & howto_table_std [j]
267 int ext
= obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
;
269 if (code
== BFD_RELOC_CTOR
)
270 switch (bfd_arch_bits_per_address (abfd
))
283 EXT (BFD_RELOC_8
, 0);
284 EXT (BFD_RELOC_16
, 1);
285 EXT (BFD_RELOC_32
, 2);
286 EXT (BFD_RELOC_HI22
, 8);
287 EXT (BFD_RELOC_LO10
, 11);
288 EXT (BFD_RELOC_32_PCREL_S2
, 6);
289 EXT (BFD_RELOC_SPARC_WDISP22
, 7);
290 EXT (BFD_RELOC_SPARC13
, 10);
291 EXT (BFD_RELOC_SPARC_GOT10
, 14);
292 EXT (BFD_RELOC_SPARC_BASE13
, 15);
293 EXT (BFD_RELOC_SPARC_GOT13
, 15);
294 EXT (BFD_RELOC_SPARC_GOT22
, 16);
295 EXT (BFD_RELOC_SPARC_PC10
, 17);
296 EXT (BFD_RELOC_SPARC_PC22
, 18);
297 EXT (BFD_RELOC_SPARC_WPLT30
, 19);
298 EXT (BFD_RELOC_SPARC_REV32
, 26);
306 STD (BFD_RELOC_8
, 0);
307 STD (BFD_RELOC_16
, 1);
308 STD (BFD_RELOC_32
, 2);
309 STD (BFD_RELOC_8_PCREL
, 4);
310 STD (BFD_RELOC_16_PCREL
, 5);
311 STD (BFD_RELOC_32_PCREL
, 6);
312 STD (BFD_RELOC_16_BASEREL
, 9);
313 STD (BFD_RELOC_32_BASEREL
, 10);
320 NAME (aout
, reloc_name_lookup
) (bfd
*abfd
, const char *r_name
)
322 unsigned int i
, size
;
323 reloc_howto_type
*howto_table
;
325 if (obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
)
327 howto_table
= howto_table_ext
;
328 size
= sizeof (howto_table_ext
) / sizeof (howto_table_ext
[0]);
332 howto_table
= howto_table_std
;
333 size
= sizeof (howto_table_std
) / sizeof (howto_table_std
[0]);
336 for (i
= 0; i
< size
; i
++)
337 if (howto_table
[i
].name
!= NULL
338 && strcasecmp (howto_table
[i
].name
, r_name
) == 0)
339 return &howto_table
[i
];
346 Internal entry points
349 @file{aoutx.h} exports several routines for accessing the
350 contents of an a.out file, which are gathered and exported in
351 turn by various format specific files (eg sunos.c).
356 aout_@var{size}_swap_exec_header_in
359 void aout_@var{size}_swap_exec_header_in,
361 struct external_exec *bytes,
362 struct internal_exec *execp);
365 Swap the information in an executable header @var{raw_bytes} taken
366 from a raw byte stream memory image into the internal exec header
367 structure @var{execp}.
370 #ifndef NAME_swap_exec_header_in
372 NAME (aout
, swap_exec_header_in
) (bfd
*abfd
,
373 struct external_exec
*bytes
,
374 struct internal_exec
*execp
)
376 /* The internal_exec structure has some fields that are unused in this
377 configuration (IE for i960), so ensure that all such uninitialized
378 fields are zero'd out. There are places where two of these structs
379 are memcmp'd, and thus the contents do matter. */
380 memset ((void *) execp
, 0, sizeof (struct internal_exec
));
381 /* Now fill in fields in the execp, from the bytes in the raw data. */
382 execp
->a_info
= H_GET_32 (abfd
, bytes
->e_info
);
383 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
384 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
385 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
386 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
387 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
388 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
389 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
391 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
396 aout_@var{size}_swap_exec_header_out
399 void aout_@var{size}_swap_exec_header_out
401 struct internal_exec *execp,
402 struct external_exec *raw_bytes);
405 Swap the information in an internal exec header structure
406 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
409 NAME (aout
, swap_exec_header_out
) (bfd
*abfd
,
410 struct internal_exec
*execp
,
411 struct external_exec
*bytes
)
413 /* Now fill in fields in the raw data, from the fields in the exec struct. */
414 H_PUT_32 (abfd
, execp
->a_info
, bytes
->e_info
);
415 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
416 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
417 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
418 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
419 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
420 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
421 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
424 /* Make all the section for an a.out file. */
427 NAME (aout
, make_sections
) (bfd
*abfd
)
429 if (obj_textsec (abfd
) == NULL
&& bfd_make_section (abfd
, ".text") == NULL
)
431 if (obj_datasec (abfd
) == NULL
&& bfd_make_section (abfd
, ".data") == NULL
)
433 if (obj_bsssec (abfd
) == NULL
&& bfd_make_section (abfd
, ".bss") == NULL
)
440 aout_@var{size}_some_aout_object_p
443 const bfd_target *aout_@var{size}_some_aout_object_p
445 struct internal_exec *execp,
446 const bfd_target *(*callback_to_real_object_p) (bfd *));
449 Some a.out variant thinks that the file open in @var{abfd}
450 checking is an a.out file. Do some more checking, and set up
451 for access if it really is. Call back to the calling
452 environment's "finish up" function just before returning, to
453 handle any last-minute setup.
457 NAME (aout
, some_aout_object_p
) (bfd
*abfd
,
458 struct internal_exec
*execp
,
459 const bfd_target
*(*callback_to_real_object_p
) (bfd
*))
461 struct aout_data_struct
*rawptr
, *oldrawptr
;
462 const bfd_target
*result
;
463 bfd_size_type amt
= sizeof (* rawptr
);
465 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
469 oldrawptr
= abfd
->tdata
.aout_data
;
470 abfd
->tdata
.aout_data
= rawptr
;
472 /* Copy the contents of the old tdata struct.
473 In particular, we want the subformat, since for hpux it was set in
474 hp300hpux.c:swap_exec_header_in and will be used in
475 hp300hpux.c:callback. */
476 if (oldrawptr
!= NULL
)
477 *abfd
->tdata
.aout_data
= *oldrawptr
;
479 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
480 /* Copy in the internal_exec struct. */
481 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
;
482 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
484 /* Set the file flags. */
485 abfd
->flags
= BFD_NO_FLAGS
;
486 if (execp
->a_drsize
|| execp
->a_trsize
)
487 abfd
->flags
|= HAS_RELOC
;
488 /* Setting of EXEC_P has been deferred to the bottom of this function. */
490 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
491 if (N_DYNAMIC (execp
))
492 abfd
->flags
|= DYNAMIC
;
494 if (N_MAGIC (execp
) == ZMAGIC
)
496 abfd
->flags
|= D_PAGED
| WP_TEXT
;
497 adata (abfd
).magic
= z_magic
;
499 else if (N_MAGIC (execp
) == QMAGIC
)
501 abfd
->flags
|= D_PAGED
| WP_TEXT
;
502 adata (abfd
).magic
= z_magic
;
503 adata (abfd
).subformat
= q_magic_format
;
505 else if (N_MAGIC (execp
) == NMAGIC
)
507 abfd
->flags
|= WP_TEXT
;
508 adata (abfd
).magic
= n_magic
;
510 else if (N_MAGIC (execp
) == OMAGIC
511 || N_MAGIC (execp
) == BMAGIC
)
512 adata (abfd
).magic
= o_magic
;
514 /* Should have been checked with N_BADMAG before this routine
518 bfd_get_start_address (abfd
) = execp
->a_entry
;
520 obj_aout_symbols (abfd
) = NULL
;
521 bfd_get_symcount (abfd
) = execp
->a_syms
/ sizeof (struct external_nlist
);
523 /* The default relocation entry size is that of traditional V7 Unix. */
524 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
526 /* The default symbol entry size is that of traditional Unix. */
527 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
530 bfd_init_window (&obj_aout_sym_window (abfd
));
531 bfd_init_window (&obj_aout_string_window (abfd
));
533 obj_aout_external_syms (abfd
) = NULL
;
534 obj_aout_external_strings (abfd
) = NULL
;
535 obj_aout_sym_hashes (abfd
) = NULL
;
537 if (! NAME (aout
, make_sections
) (abfd
))
540 obj_datasec (abfd
)->size
= execp
->a_data
;
541 obj_bsssec (abfd
)->size
= execp
->a_bss
;
543 obj_textsec (abfd
)->flags
=
544 (execp
->a_trsize
!= 0
545 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
546 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
547 obj_datasec (abfd
)->flags
=
548 (execp
->a_drsize
!= 0
549 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
550 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
551 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
553 #ifdef THIS_IS_ONLY_DOCUMENTATION
554 /* The common code can't fill in these things because they depend
555 on either the start address of the text segment, the rounding
556 up of virtual addresses between segments, or the starting file
557 position of the text segment -- all of which varies among different
558 versions of a.out. */
560 /* Call back to the format-dependent code to fill in the rest of the
561 fields and do any further cleanup. Things that should be filled
562 in by the callback: */
564 struct exec
*execp
= exec_hdr (abfd
);
566 obj_textsec (abfd
)->size
= N_TXTSIZE (execp
);
567 /* Data and bss are already filled in since they're so standard. */
569 /* The virtual memory addresses of the sections. */
570 obj_textsec (abfd
)->vma
= N_TXTADDR (execp
);
571 obj_datasec (abfd
)->vma
= N_DATADDR (execp
);
572 obj_bsssec (abfd
)->vma
= N_BSSADDR (execp
);
574 /* The file offsets of the sections. */
575 obj_textsec (abfd
)->filepos
= N_TXTOFF (execp
);
576 obj_datasec (abfd
)->filepos
= N_DATOFF (execp
);
578 /* The file offsets of the relocation info. */
579 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF (execp
);
580 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF (execp
);
582 /* The file offsets of the string table and symbol table. */
583 obj_str_filepos (abfd
) = N_STROFF (execp
);
584 obj_sym_filepos (abfd
) = N_SYMOFF (execp
);
586 /* Determine the architecture and machine type of the object file. */
587 switch (N_MACHTYPE (exec_hdr (abfd
)))
590 abfd
->obj_arch
= bfd_arch_obscure
;
594 adata (abfd
)->page_size
= TARGET_PAGE_SIZE
;
595 adata (abfd
)->segment_size
= SEGMENT_SIZE
;
596 adata (abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
600 /* The architecture is encoded in various ways in various a.out variants,
601 or is not encoded at all in some of them. The relocation size depends
602 on the architecture and the a.out variant. Finally, the return value
603 is the bfd_target vector in use. If an error occurs, return zero and
604 set bfd_error to the appropriate error code.
606 Formats such as b.out, which have additional fields in the a.out
607 header, should cope with them in this callback as well. */
608 #endif /* DOCUMENTATION */
610 result
= (*callback_to_real_object_p
) (abfd
);
612 /* Now that the segment addresses have been worked out, take a better
613 guess at whether the file is executable. If the entry point
614 is within the text segment, assume it is. (This makes files
615 executable even if their entry point address is 0, as long as
616 their text starts at zero.).
618 This test had to be changed to deal with systems where the text segment
619 runs at a different location than the default. The problem is that the
620 entry address can appear to be outside the text segment, thus causing an
621 erroneous conclusion that the file isn't executable.
623 To fix this, we now accept any non-zero entry point as an indication of
624 executability. This will work most of the time, since only the linker
625 sets the entry point, and that is likely to be non-zero for most systems. */
627 if (execp
->a_entry
!= 0
628 || (execp
->a_entry
>= obj_textsec (abfd
)->vma
629 && execp
->a_entry
< (obj_textsec (abfd
)->vma
630 + obj_textsec (abfd
)->size
)
631 && execp
->a_trsize
== 0
632 && execp
->a_drsize
== 0))
633 abfd
->flags
|= EXEC_P
;
637 struct stat stat_buf
;
639 /* The original heuristic doesn't work in some important cases.
640 The a.out file has no information about the text start
641 address. For files (like kernels) linked to non-standard
642 addresses (ld -Ttext nnn) the entry point may not be between
643 the default text start (obj_textsec(abfd)->vma) and
644 (obj_textsec(abfd)->vma) + text size. This is not just a mach
645 issue. Many kernels are loaded at non standard addresses. */
646 if (abfd
->iostream
!= NULL
647 && (abfd
->flags
& BFD_IN_MEMORY
) == 0
648 && (fstat (fileno ((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
649 && ((stat_buf
.st_mode
& 0111) != 0))
650 abfd
->flags
|= EXEC_P
;
652 #endif /* STAT_FOR_EXEC */
658 bfd_release (abfd
, rawptr
);
659 abfd
->tdata
.aout_data
= oldrawptr
;
665 aout_@var{size}_mkobject
668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
671 Initialize BFD @var{abfd} for use with a.out files.
675 NAME (aout
, mkobject
) (bfd
*abfd
)
677 struct aout_data_struct
*rawptr
;
678 bfd_size_type amt
= sizeof (* rawptr
);
680 bfd_set_error (bfd_error_system_call
);
682 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
686 abfd
->tdata
.aout_data
= rawptr
;
687 exec_hdr (abfd
) = &(rawptr
->e
);
689 obj_textsec (abfd
) = NULL
;
690 obj_datasec (abfd
) = NULL
;
691 obj_bsssec (abfd
) = NULL
;
698 aout_@var{size}_machine_type
701 enum machine_type aout_@var{size}_machine_type
702 (enum bfd_architecture arch,
703 unsigned long machine,
704 bfd_boolean *unknown);
707 Keep track of machine architecture and machine type for
708 a.out's. Return the <<machine_type>> for a particular
709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
710 and machine can't be represented in a.out format.
712 If the architecture is understood, machine type 0 (default)
713 is always understood.
717 NAME (aout
, machine_type
) (enum bfd_architecture arch
,
718 unsigned long machine
,
719 bfd_boolean
*unknown
)
721 enum machine_type arch_flags
;
723 arch_flags
= M_UNKNOWN
;
730 || machine
== bfd_mach_sparc
731 || machine
== bfd_mach_sparc_sparclite
732 || machine
== bfd_mach_sparc_sparclite_le
733 || machine
== bfd_mach_sparc_v8plus
734 || machine
== bfd_mach_sparc_v8plusa
735 || machine
== bfd_mach_sparc_v8plusb
736 || machine
== bfd_mach_sparc_v8plusc
737 || machine
== bfd_mach_sparc_v8plusd
738 || machine
== bfd_mach_sparc_v8pluse
739 || machine
== bfd_mach_sparc_v8plusv
740 || machine
== bfd_mach_sparc_v8plusm
741 || machine
== bfd_mach_sparc_v8plusm8
742 || machine
== bfd_mach_sparc_v9
743 || machine
== bfd_mach_sparc_v9a
744 || machine
== bfd_mach_sparc_v9b
745 || machine
== bfd_mach_sparc_v9c
746 || machine
== bfd_mach_sparc_v9d
747 || machine
== bfd_mach_sparc_v9e
748 || machine
== bfd_mach_sparc_v9v
749 || machine
== bfd_mach_sparc_v9m
750 || machine
== bfd_mach_sparc_v9m8
)
751 arch_flags
= M_SPARC
;
752 else if (machine
== bfd_mach_sparc_sparclet
)
753 arch_flags
= M_SPARCLET
;
759 case 0: arch_flags
= M_68010
; break;
760 case bfd_mach_m68000
: arch_flags
= M_UNKNOWN
; *unknown
= FALSE
; break;
761 case bfd_mach_m68010
: arch_flags
= M_68010
; break;
762 case bfd_mach_m68020
: arch_flags
= M_68020
; break;
763 default: arch_flags
= M_UNKNOWN
; break;
769 || machine
== bfd_mach_i386_i386
770 || machine
== bfd_mach_i386_i386_intel_syntax
)
783 case bfd_mach_mips3000
:
784 case bfd_mach_mips3900
:
785 arch_flags
= M_MIPS1
;
787 case bfd_mach_mips6000
:
788 arch_flags
= M_MIPS2
;
790 case bfd_mach_mips4000
:
791 case bfd_mach_mips4010
:
792 case bfd_mach_mips4100
:
793 case bfd_mach_mips4300
:
794 case bfd_mach_mips4400
:
795 case bfd_mach_mips4600
:
796 case bfd_mach_mips4650
:
797 case bfd_mach_mips8000
:
798 case bfd_mach_mips9000
:
799 case bfd_mach_mips10000
:
800 case bfd_mach_mips12000
:
801 case bfd_mach_mips14000
:
802 case bfd_mach_mips16000
:
803 case bfd_mach_mips16
:
804 case bfd_mach_mipsisa32
:
805 case bfd_mach_mipsisa32r2
:
806 case bfd_mach_mipsisa32r3
:
807 case bfd_mach_mipsisa32r5
:
808 case bfd_mach_mipsisa32r6
:
810 case bfd_mach_mipsisa64
:
811 case bfd_mach_mipsisa64r2
:
812 case bfd_mach_mipsisa64r3
:
813 case bfd_mach_mipsisa64r5
:
814 case bfd_mach_mipsisa64r6
:
815 case bfd_mach_mips_sb1
:
816 case bfd_mach_mips_xlr
:
817 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
818 arch_flags
= M_MIPS2
;
821 arch_flags
= M_UNKNOWN
;
829 case 0: arch_flags
= M_NS32532
; break;
830 case 32032: arch_flags
= M_NS32032
; break;
831 case 32532: arch_flags
= M_NS32532
; break;
832 default: arch_flags
= M_UNKNOWN
; break;
841 if (machine
== 0 || machine
== 255)
850 arch_flags
= M_UNKNOWN
;
853 if (arch_flags
!= M_UNKNOWN
)
861 aout_@var{size}_set_arch_mach
864 bfd_boolean aout_@var{size}_set_arch_mach,
866 enum bfd_architecture arch,
867 unsigned long machine);
870 Set the architecture and the machine of the BFD @var{abfd} to the
871 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
872 can support the architecture required.
876 NAME (aout
, set_arch_mach
) (bfd
*abfd
,
877 enum bfd_architecture arch
,
878 unsigned long machine
)
880 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
883 if (arch
!= bfd_arch_unknown
)
887 NAME (aout
, machine_type
) (arch
, machine
, &unknown
);
892 /* Determine the size of a relocation entry. */
897 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
900 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
904 return (*aout_backend_info (abfd
)->set_sizes
) (abfd
);
908 adjust_o_magic (bfd
*abfd
, struct internal_exec
*execp
)
910 file_ptr pos
= adata (abfd
).exec_bytes_size
;
915 obj_textsec (abfd
)->filepos
= pos
;
916 if (!obj_textsec (abfd
)->user_set_vma
)
917 obj_textsec (abfd
)->vma
= vma
;
919 vma
= obj_textsec (abfd
)->vma
;
921 pos
+= obj_textsec (abfd
)->size
;
922 vma
+= obj_textsec (abfd
)->size
;
925 if (!obj_datasec (abfd
)->user_set_vma
)
927 obj_textsec (abfd
)->size
+= pad
;
930 obj_datasec (abfd
)->vma
= vma
;
933 vma
= obj_datasec (abfd
)->vma
;
934 obj_datasec (abfd
)->filepos
= pos
;
935 pos
+= obj_datasec (abfd
)->size
;
936 vma
+= obj_datasec (abfd
)->size
;
939 if (!obj_bsssec (abfd
)->user_set_vma
)
941 obj_datasec (abfd
)->size
+= pad
;
944 obj_bsssec (abfd
)->vma
= vma
;
948 /* The VMA of the .bss section is set by the VMA of the
949 .data section plus the size of the .data section. We may
950 need to add padding bytes to make this true. */
951 pad
= obj_bsssec (abfd
)->vma
- vma
;
954 obj_datasec (abfd
)->size
+= pad
;
958 obj_bsssec (abfd
)->filepos
= pos
;
960 /* Fix up the exec header. */
961 execp
->a_text
= obj_textsec (abfd
)->size
;
962 execp
->a_data
= obj_datasec (abfd
)->size
;
963 execp
->a_bss
= obj_bsssec (abfd
)->size
;
964 N_SET_MAGIC (execp
, OMAGIC
);
968 adjust_z_magic (bfd
*abfd
, struct internal_exec
*execp
)
970 bfd_size_type data_pad
, text_pad
;
972 const struct aout_backend_data
*abdp
;
973 /* TRUE if text includes exec header. */
976 abdp
= aout_backend_info (abfd
);
980 && (abdp
->text_includes_header
981 || obj_aout_subformat (abfd
) == q_magic_format
));
982 obj_textsec (abfd
)->filepos
= (ztih
983 ? adata (abfd
).exec_bytes_size
984 : adata (abfd
).zmagic_disk_block_size
);
985 if (! obj_textsec (abfd
)->user_set_vma
)
987 /* ?? Do we really need to check for relocs here? */
988 obj_textsec (abfd
)->vma
= ((abfd
->flags
& HAS_RELOC
)
991 ? (abdp
->default_text_vma
992 + adata (abfd
).exec_bytes_size
)
993 : abdp
->default_text_vma
));
998 /* The .text section is being loaded at an unusual address. We
999 may need to pad it such that the .data section starts at a page
1002 text_pad
= ((obj_textsec (abfd
)->filepos
- obj_textsec (abfd
)->vma
)
1003 & (adata (abfd
).page_size
- 1));
1005 text_pad
= ((- obj_textsec (abfd
)->vma
)
1006 & (adata (abfd
).page_size
- 1));
1009 /* Find start of data. */
1012 text_end
= obj_textsec (abfd
)->filepos
+ obj_textsec (abfd
)->size
;
1013 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1017 /* Note that if page_size == zmagic_disk_block_size, then
1018 filepos == page_size, and this case is the same as the ztih
1020 text_end
= obj_textsec (abfd
)->size
;
1021 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1022 text_end
+= obj_textsec (abfd
)->filepos
;
1024 obj_textsec (abfd
)->size
+= text_pad
;
1025 text_end
+= text_pad
;
1028 if (!obj_datasec (abfd
)->user_set_vma
)
1031 vma
= obj_textsec (abfd
)->vma
+ obj_textsec (abfd
)->size
;
1032 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1034 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
1036 asection
* text
= obj_textsec (abfd
);
1037 asection
* data
= obj_datasec (abfd
);
1039 text_pad
= data
->vma
- (text
->vma
+ text
->size
);
1040 /* Only pad the text section if the data
1041 section is going to be placed after it. */
1043 text
->size
+= text_pad
;
1045 obj_datasec (abfd
)->filepos
= (obj_textsec (abfd
)->filepos
1046 + obj_textsec (abfd
)->size
);
1048 /* Fix up exec header while we're at it. */
1049 execp
->a_text
= obj_textsec (abfd
)->size
;
1050 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
1051 execp
->a_text
+= adata (abfd
).exec_bytes_size
;
1052 if (obj_aout_subformat (abfd
) == q_magic_format
)
1053 N_SET_MAGIC (execp
, QMAGIC
);
1055 N_SET_MAGIC (execp
, ZMAGIC
);
1057 /* Spec says data section should be rounded up to page boundary. */
1058 obj_datasec (abfd
)->size
1059 = align_power (obj_datasec (abfd
)->size
,
1060 obj_bsssec (abfd
)->alignment_power
);
1061 execp
->a_data
= BFD_ALIGN (obj_datasec (abfd
)->size
,
1062 adata (abfd
).page_size
);
1063 data_pad
= execp
->a_data
- obj_datasec (abfd
)->size
;
1066 if (!obj_bsssec (abfd
)->user_set_vma
)
1067 obj_bsssec (abfd
)->vma
= (obj_datasec (abfd
)->vma
1068 + obj_datasec (abfd
)->size
);
1069 /* If the BSS immediately follows the data section and extra space
1070 in the page is left after the data section, fudge data
1071 in the header so that the bss section looks smaller by that
1072 amount. We'll start the bss section there, and lie to the OS.
1073 (Note that a linker script, as well as the above assignment,
1074 could have explicitly set the BSS vma to immediately follow
1075 the data section.) */
1076 if (align_power (obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->alignment_power
)
1077 == obj_datasec (abfd
)->vma
+ obj_datasec (abfd
)->size
)
1078 execp
->a_bss
= (data_pad
> obj_bsssec (abfd
)->size
1079 ? 0 : obj_bsssec (abfd
)->size
- data_pad
);
1081 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1085 adjust_n_magic (bfd
*abfd
, struct internal_exec
*execp
)
1087 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1092 obj_textsec (abfd
)->filepos
= pos
;
1093 if (!obj_textsec (abfd
)->user_set_vma
)
1094 obj_textsec (abfd
)->vma
= vma
;
1096 vma
= obj_textsec (abfd
)->vma
;
1097 pos
+= obj_textsec (abfd
)->size
;
1098 vma
+= obj_textsec (abfd
)->size
;
1101 obj_datasec (abfd
)->filepos
= pos
;
1102 if (!obj_datasec (abfd
)->user_set_vma
)
1103 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1104 vma
= obj_datasec (abfd
)->vma
;
1106 /* Since BSS follows data immediately, see if it needs alignment. */
1107 vma
+= obj_datasec (abfd
)->size
;
1108 pad
= align_power (vma
, obj_bsssec (abfd
)->alignment_power
) - vma
;
1109 obj_datasec (abfd
)->size
+= pad
;
1110 pos
+= obj_datasec (abfd
)->size
;
1113 if (!obj_bsssec (abfd
)->user_set_vma
)
1114 obj_bsssec (abfd
)->vma
= vma
;
1116 vma
= obj_bsssec (abfd
)->vma
;
1118 /* Fix up exec header. */
1119 execp
->a_text
= obj_textsec (abfd
)->size
;
1120 execp
->a_data
= obj_datasec (abfd
)->size
;
1121 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1122 N_SET_MAGIC (execp
, NMAGIC
);
1126 NAME (aout
, adjust_sizes_and_vmas
) (bfd
*abfd
)
1128 struct internal_exec
*execp
= exec_hdr (abfd
);
1130 if (! NAME (aout
, make_sections
) (abfd
))
1133 if (adata (abfd
).magic
!= undecided_magic
)
1136 obj_textsec (abfd
)->size
=
1137 align_power (obj_textsec (abfd
)->size
,
1138 obj_textsec (abfd
)->alignment_power
);
1140 /* Rule (heuristic) for when to pad to a new page. Note that there
1141 are (at least) two ways demand-paged (ZMAGIC) files have been
1142 handled. Most Berkeley-based systems start the text segment at
1143 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1144 segment right after the exec header; the latter is counted in the
1145 text segment size, and is paged in by the kernel with the rest of
1148 /* This perhaps isn't the right way to do this, but made it simpler for me
1149 to understand enough to implement it. Better would probably be to go
1150 right from BFD flags to alignment/positioning characteristics. But the
1151 old code was sloppy enough about handling the flags, and had enough
1152 other magic, that it was a little hard for me to understand. I think
1153 I understand it better now, but I haven't time to do the cleanup this
1156 if (abfd
->flags
& D_PAGED
)
1157 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1158 adata (abfd
).magic
= z_magic
;
1159 else if (abfd
->flags
& WP_TEXT
)
1160 adata (abfd
).magic
= n_magic
;
1162 adata (abfd
).magic
= o_magic
;
1164 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1166 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1168 switch (adata (abfd
).magic
)
1170 case n_magic
: str
= "NMAGIC"; break;
1171 case o_magic
: str
= "OMAGIC"; break;
1172 case z_magic
: str
= "ZMAGIC"; break;
1177 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1178 obj_textsec (abfd
)->alignment_power
,
1179 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1180 obj_datasec (abfd
)->alignment_power
,
1181 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
,
1182 obj_bsssec (abfd
)->alignment_power
);
1186 switch (adata (abfd
).magic
)
1189 adjust_o_magic (abfd
, execp
);
1192 adjust_z_magic (abfd
, execp
);
1195 adjust_n_magic (abfd
, execp
);
1201 #ifdef BFD_AOUT_DEBUG
1202 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1203 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1204 obj_textsec (abfd
)->filepos
,
1205 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1206 obj_datasec (abfd
)->filepos
,
1207 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
);
1215 aout_@var{size}_new_section_hook
1218 bfd_boolean aout_@var{size}_new_section_hook,
1223 Called by the BFD in response to a @code{bfd_make_section}
1227 NAME (aout
, new_section_hook
) (bfd
*abfd
, asection
*newsect
)
1229 /* Align to double at least. */
1230 newsect
->alignment_power
= bfd_get_arch_info (abfd
)->section_align_power
;
1232 if (bfd_get_format (abfd
) == bfd_object
)
1234 if (obj_textsec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".text"))
1236 obj_textsec (abfd
)= newsect
;
1237 newsect
->target_index
= N_TEXT
;
1239 else if (obj_datasec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".data"))
1241 obj_datasec (abfd
) = newsect
;
1242 newsect
->target_index
= N_DATA
;
1244 else if (obj_bsssec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".bss"))
1246 obj_bsssec (abfd
) = newsect
;
1247 newsect
->target_index
= N_BSS
;
1251 /* We allow more than three sections internally. */
1252 return _bfd_generic_new_section_hook (abfd
, newsect
);
1256 NAME (aout
, set_section_contents
) (bfd
*abfd
,
1258 const void * location
,
1260 bfd_size_type count
)
1262 if (! abfd
->output_has_begun
)
1264 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
1268 if (section
== obj_bsssec (abfd
))
1270 bfd_set_error (bfd_error_no_contents
);
1274 if (section
!= obj_textsec (abfd
)
1275 && section
!= obj_datasec (abfd
))
1277 if (aout_section_merge_with_text_p (abfd
, section
))
1278 section
->filepos
= obj_textsec (abfd
)->filepos
+
1279 (section
->vma
- obj_textsec (abfd
)->vma
);
1283 /* xgettext:c-format */
1284 (_("%B: can not represent section `%A' in a.out object file format"),
1286 bfd_set_error (bfd_error_nonrepresentable_section
);
1293 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1294 || bfd_bwrite (location
, count
, abfd
) != count
)
1301 /* Read the external symbols from an a.out file. */
1304 aout_get_external_symbols (bfd
*abfd
)
1306 if (obj_aout_external_syms (abfd
) == NULL
)
1308 bfd_size_type count
;
1309 struct external_nlist
*syms
;
1310 bfd_size_type amt
= exec_hdr (abfd
)->a_syms
;
1312 count
= amt
/ EXTERNAL_NLIST_SIZE
;
1314 return TRUE
; /* Nothing to do. */
1317 if (! bfd_get_file_window (abfd
, obj_sym_filepos (abfd
), amt
,
1318 &obj_aout_sym_window (abfd
), TRUE
))
1320 syms
= (struct external_nlist
*) obj_aout_sym_window (abfd
).data
;
1322 /* We allocate using malloc to make the values easy to free
1323 later on. If we put them on the objalloc it might not be
1324 possible to free them. */
1325 syms
= (struct external_nlist
*) bfd_malloc (amt
);
1329 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1330 || bfd_bread (syms
, amt
, abfd
) != amt
)
1337 obj_aout_external_syms (abfd
) = syms
;
1338 obj_aout_external_sym_count (abfd
) = count
;
1341 if (obj_aout_external_strings (abfd
) == NULL
1342 && exec_hdr (abfd
)->a_syms
!= 0)
1344 unsigned char string_chars
[BYTES_IN_WORD
];
1345 bfd_size_type stringsize
;
1347 bfd_size_type amt
= BYTES_IN_WORD
;
1349 /* Get the size of the strings. */
1350 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1351 || bfd_bread ((void *) string_chars
, amt
, abfd
) != amt
)
1353 stringsize
= GET_WORD (abfd
, string_chars
);
1356 if (! bfd_get_file_window (abfd
, obj_str_filepos (abfd
), stringsize
,
1357 &obj_aout_string_window (abfd
), TRUE
))
1359 strings
= (char *) obj_aout_string_window (abfd
).data
;
1361 strings
= (char *) bfd_malloc (stringsize
+ 1);
1362 if (strings
== NULL
)
1365 /* Skip space for the string count in the buffer for convenience
1366 when using indexes. */
1367 amt
= stringsize
- BYTES_IN_WORD
;
1368 if (bfd_bread (strings
+ BYTES_IN_WORD
, amt
, abfd
) != amt
)
1375 /* Ensure that a zero index yields an empty string. */
1378 strings
[stringsize
- 1] = 0;
1380 obj_aout_external_strings (abfd
) = strings
;
1381 obj_aout_external_string_size (abfd
) = stringsize
;
1387 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1388 and symbol->value fields of CACHE_PTR will be set from the a.out
1389 nlist structure. This function is responsible for setting
1390 symbol->flags and symbol->section, and adjusting symbol->value. */
1393 translate_from_native_sym_flags (bfd
*abfd
, aout_symbol_type
*cache_ptr
)
1397 if ((cache_ptr
->type
& N_STAB
) != 0
1398 || cache_ptr
->type
== N_FN
)
1402 /* This is a debugging symbol. */
1403 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1405 /* Work out the symbol section. */
1406 switch (cache_ptr
->type
& N_TYPE
)
1410 sec
= obj_textsec (abfd
);
1413 sec
= obj_datasec (abfd
);
1416 sec
= obj_bsssec (abfd
);
1420 sec
= bfd_abs_section_ptr
;
1424 cache_ptr
->symbol
.section
= sec
;
1425 cache_ptr
->symbol
.value
-= sec
->vma
;
1430 /* Get the default visibility. This does not apply to all types, so
1431 we just hold it in a local variable to use if wanted. */
1432 if ((cache_ptr
->type
& N_EXT
) == 0)
1433 visible
= BSF_LOCAL
;
1435 visible
= BSF_GLOBAL
;
1437 switch (cache_ptr
->type
)
1440 case N_ABS
: case N_ABS
| N_EXT
:
1441 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1442 cache_ptr
->symbol
.flags
= visible
;
1445 case N_UNDF
| N_EXT
:
1446 if (cache_ptr
->symbol
.value
!= 0)
1448 /* This is a common symbol. */
1449 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1450 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1454 cache_ptr
->symbol
.flags
= 0;
1455 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1459 case N_TEXT
: case N_TEXT
| N_EXT
:
1460 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1461 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1462 cache_ptr
->symbol
.flags
= visible
;
1465 /* N_SETV symbols used to represent set vectors placed in the
1466 data section. They are no longer generated. Theoretically,
1467 it was possible to extract the entries and combine them with
1468 new ones, although I don't know if that was ever actually
1469 done. Unless that feature is restored, treat them as data
1471 case N_SETV
: case N_SETV
| N_EXT
:
1472 case N_DATA
: case N_DATA
| N_EXT
:
1473 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1474 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1475 cache_ptr
->symbol
.flags
= visible
;
1478 case N_BSS
: case N_BSS
| N_EXT
:
1479 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1480 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1481 cache_ptr
->symbol
.flags
= visible
;
1484 case N_SETA
: case N_SETA
| N_EXT
:
1485 case N_SETT
: case N_SETT
| N_EXT
:
1486 case N_SETD
: case N_SETD
| N_EXT
:
1487 case N_SETB
: case N_SETB
| N_EXT
:
1489 /* This code is no longer needed. It used to be used to make
1490 the linker handle set symbols, but they are now handled in
1491 the add_symbols routine instead. */
1492 switch (cache_ptr
->type
& N_TYPE
)
1495 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1498 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1501 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1504 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1508 cache_ptr
->symbol
.flags
|= BSF_CONSTRUCTOR
;
1513 /* This symbol is the text of a warning message. The next
1514 symbol is the symbol to associate the warning with. If a
1515 reference is made to that symbol, a warning is issued. */
1516 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_WARNING
;
1517 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1520 case N_INDR
: case N_INDR
| N_EXT
:
1521 /* An indirect symbol. This consists of two symbols in a row.
1522 The first symbol is the name of the indirection. The second
1523 symbol is the name of the target. A reference to the first
1524 symbol becomes a reference to the second. */
1525 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_INDIRECT
| visible
;
1526 cache_ptr
->symbol
.section
= bfd_ind_section_ptr
;
1530 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1531 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1535 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1536 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1540 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1541 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1542 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1546 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1547 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1548 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1552 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1553 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1554 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1561 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1564 translate_to_native_sym_flags (bfd
*abfd
,
1566 struct external_nlist
*sym_pointer
)
1568 bfd_vma value
= cache_ptr
->value
;
1572 /* Mask out any existing type bits in case copying from one section
1574 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1576 sec
= bfd_get_section (cache_ptr
);
1581 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1584 /* xgettext:c-format */
1585 (_("%B: can not represent section for symbol `%s' in a.out "
1586 "object file format"),
1588 cache_ptr
->name
!= NULL
? cache_ptr
->name
: _("*unknown*"));
1589 bfd_set_error (bfd_error_nonrepresentable_section
);
1593 if (sec
->output_section
!= NULL
)
1595 off
= sec
->output_offset
;
1596 sec
= sec
->output_section
;
1599 if (bfd_is_abs_section (sec
))
1600 sym_pointer
->e_type
[0] |= N_ABS
;
1601 else if (sec
== obj_textsec (abfd
))
1602 sym_pointer
->e_type
[0] |= N_TEXT
;
1603 else if (sec
== obj_datasec (abfd
))
1604 sym_pointer
->e_type
[0] |= N_DATA
;
1605 else if (sec
== obj_bsssec (abfd
))
1606 sym_pointer
->e_type
[0] |= N_BSS
;
1607 else if (bfd_is_und_section (sec
))
1608 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1609 else if (bfd_is_ind_section (sec
))
1610 sym_pointer
->e_type
[0] = N_INDR
;
1611 else if (bfd_is_com_section (sec
))
1612 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1615 if (aout_section_merge_with_text_p (abfd
, sec
))
1616 sym_pointer
->e_type
[0] |= N_TEXT
;
1620 /* xgettext:c-format */
1621 (_("%B: can not represent section `%A' in a.out object file format"),
1623 bfd_set_error (bfd_error_nonrepresentable_section
);
1628 /* Turn the symbol from section relative to absolute again. */
1629 value
+= sec
->vma
+ off
;
1631 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1632 sym_pointer
->e_type
[0] = N_WARNING
;
1634 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1635 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1636 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1637 sym_pointer
->e_type
[0] |= N_EXT
;
1638 else if ((cache_ptr
->flags
& BSF_LOCAL
) != 0)
1639 sym_pointer
->e_type
[0] &= ~N_EXT
;
1641 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1643 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1647 case N_ABS
: type
= N_SETA
; break;
1648 case N_TEXT
: type
= N_SETT
; break;
1649 case N_DATA
: type
= N_SETD
; break;
1650 case N_BSS
: type
= N_SETB
; break;
1652 sym_pointer
->e_type
[0] = type
;
1655 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1659 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1662 case N_ABS
: type
= N_WEAKA
; break;
1663 case N_TEXT
: type
= N_WEAKT
; break;
1664 case N_DATA
: type
= N_WEAKD
; break;
1665 case N_BSS
: type
= N_WEAKB
; break;
1666 case N_UNDF
: type
= N_WEAKU
; break;
1668 sym_pointer
->e_type
[0] = type
;
1671 PUT_WORD (abfd
, value
, sym_pointer
->e_value
);
1676 /* Native-level interface to symbols. */
1679 NAME (aout
, make_empty_symbol
) (bfd
*abfd
)
1681 bfd_size_type amt
= sizeof (aout_symbol_type
);
1683 aout_symbol_type
*new_symbol
= (aout_symbol_type
*) bfd_zalloc (abfd
, amt
);
1686 new_symbol
->symbol
.the_bfd
= abfd
;
1688 return &new_symbol
->symbol
;
1691 /* Translate a set of internal symbols into external symbols. */
1694 NAME (aout
, translate_symbol_table
) (bfd
*abfd
,
1695 aout_symbol_type
*in
,
1696 struct external_nlist
*ext
,
1697 bfd_size_type count
,
1699 bfd_size_type strsize
,
1700 bfd_boolean dynamic
)
1702 struct external_nlist
*ext_end
;
1704 ext_end
= ext
+ count
;
1705 for (; ext
< ext_end
; ext
++, in
++)
1709 x
= GET_WORD (abfd
, ext
->e_strx
);
1710 in
->symbol
.the_bfd
= abfd
;
1712 /* For the normal symbols, the zero index points at the number
1713 of bytes in the string table but is to be interpreted as the
1714 null string. For the dynamic symbols, the number of bytes in
1715 the string table is stored in the __DYNAMIC structure and the
1716 zero index points at an actual string. */
1717 if (x
== 0 && ! dynamic
)
1718 in
->symbol
.name
= "";
1719 else if (x
< strsize
)
1720 in
->symbol
.name
= str
+ x
;
1724 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1725 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1726 in
->other
= H_GET_8 (abfd
, ext
->e_other
);
1727 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1728 in
->symbol
.udata
.p
= NULL
;
1730 if (! translate_from_native_sym_flags (abfd
, in
))
1734 in
->symbol
.flags
|= BSF_DYNAMIC
;
1740 /* We read the symbols into a buffer, which is discarded when this
1741 function exits. We read the strings into a buffer large enough to
1742 hold them all plus all the cached symbol entries. */
1745 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1747 struct external_nlist
*old_external_syms
;
1748 aout_symbol_type
*cached
;
1749 bfd_size_type cached_size
;
1751 /* If there's no work to be done, don't do any. */
1752 if (obj_aout_symbols (abfd
) != NULL
)
1755 old_external_syms
= obj_aout_external_syms (abfd
);
1757 if (! aout_get_external_symbols (abfd
))
1760 cached_size
= obj_aout_external_sym_count (abfd
);
1761 if (cached_size
== 0)
1762 return TRUE
; /* Nothing to do. */
1764 cached_size
*= sizeof (aout_symbol_type
);
1765 cached
= (aout_symbol_type
*) bfd_zmalloc (cached_size
);
1769 /* Convert from external symbol information to internal. */
1770 if (! (NAME (aout
, translate_symbol_table
)
1772 obj_aout_external_syms (abfd
),
1773 obj_aout_external_sym_count (abfd
),
1774 obj_aout_external_strings (abfd
),
1775 obj_aout_external_string_size (abfd
),
1782 bfd_get_symcount (abfd
) = obj_aout_external_sym_count (abfd
);
1784 obj_aout_symbols (abfd
) = cached
;
1786 /* It is very likely that anybody who calls this function will not
1787 want the external symbol information, so if it was allocated
1788 because of our call to aout_get_external_symbols, we free it up
1789 right away to save space. */
1790 if (old_external_syms
== NULL
1791 && obj_aout_external_syms (abfd
) != NULL
)
1794 bfd_free_window (&obj_aout_sym_window (abfd
));
1796 free (obj_aout_external_syms (abfd
));
1798 obj_aout_external_syms (abfd
) = NULL
;
1804 /* We use a hash table when writing out symbols so that we only write
1805 out a particular string once. This helps particularly when the
1806 linker writes out stabs debugging entries, because each different
1807 contributing object file tends to have many duplicate stabs
1810 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1811 if BFD_TRADITIONAL_FORMAT is set. */
1813 /* Get the index of a string in a strtab, adding it if it is not
1816 static inline bfd_size_type
1817 add_to_stringtab (bfd
*abfd
,
1818 struct bfd_strtab_hash
*tab
,
1823 bfd_size_type str_index
;
1825 /* An index of 0 always means the empty string. */
1826 if (str
== 0 || *str
== '\0')
1829 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1830 doesn't understand a hashed string table. */
1832 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1835 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1837 if (str_index
!= (bfd_size_type
) -1)
1838 /* Add BYTES_IN_WORD to the return value to account for the
1839 space taken up by the string table size. */
1840 str_index
+= BYTES_IN_WORD
;
1845 /* Write out a strtab. ABFD is already at the right location in the
1849 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1851 bfd_byte buffer
[BYTES_IN_WORD
];
1852 bfd_size_type amt
= BYTES_IN_WORD
;
1854 /* The string table starts with the size. */
1855 PUT_WORD (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_WORD
, buffer
);
1856 if (bfd_bwrite ((void *) buffer
, amt
, abfd
) != amt
)
1859 return _bfd_stringtab_emit (abfd
, tab
);
1863 NAME (aout
, write_syms
) (bfd
*abfd
)
1865 unsigned int count
;
1866 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1867 struct bfd_strtab_hash
*strtab
;
1869 strtab
= _bfd_stringtab_init ();
1873 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1875 asymbol
*g
= generic
[count
];
1877 struct external_nlist nsp
;
1880 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, FALSE
);
1881 if (indx
== (bfd_size_type
) -1)
1883 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1885 if (bfd_asymbol_flavour (g
) == abfd
->xvec
->flavour
)
1887 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1888 H_PUT_8 (abfd
, aout_symbol (g
)->other
, nsp
.e_other
);
1889 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1893 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1894 H_PUT_8 (abfd
, 0, nsp
.e_other
);
1895 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1898 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1901 amt
= EXTERNAL_NLIST_SIZE
;
1902 if (bfd_bwrite ((void *) &nsp
, amt
, abfd
) != amt
)
1905 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1906 here, at the end. */
1910 if (! emit_stringtab (abfd
, strtab
))
1913 _bfd_stringtab_free (strtab
);
1918 _bfd_stringtab_free (strtab
);
1923 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1925 unsigned int counter
= 0;
1926 aout_symbol_type
*symbase
;
1928 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1931 for (symbase
= obj_aout_symbols (abfd
);
1932 counter
++ < bfd_get_symcount (abfd
);
1934 *(location
++) = (asymbol
*) (symbase
++);
1936 return bfd_get_symcount (abfd
);
1939 /* Standard reloc stuff. */
1940 /* Output standard relocation information to a file in target byte order. */
1942 extern void NAME (aout
, swap_std_reloc_out
)
1943 (bfd
*, arelent
*, struct reloc_std_external
*);
1946 NAME (aout
, swap_std_reloc_out
) (bfd
*abfd
,
1948 struct reloc_std_external
*natptr
)
1951 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1953 unsigned int r_length
;
1955 int r_baserel
, r_jmptable
, r_relative
;
1956 asection
*output_section
= sym
->section
->output_section
;
1958 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
1960 BFD_ASSERT (g
->howto
!= NULL
);
1961 r_length
= g
->howto
->size
; /* Size as a power of two. */
1962 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1963 /* XXX This relies on relocs coming from a.out files. */
1964 r_baserel
= (g
->howto
->type
& 8) != 0;
1965 r_jmptable
= (g
->howto
->type
& 16) != 0;
1966 r_relative
= (g
->howto
->type
& 32) != 0;
1968 /* Name was clobbered by aout_write_syms to be symbol index. */
1970 /* If this relocation is relative to a symbol then set the
1971 r_index to the symbols index, and the r_extern bit.
1973 Absolute symbols can come in in two ways, either as an offset
1974 from the abs section, or as a symbol which has an abs value.
1975 check for that here. */
1977 if (bfd_is_com_section (output_section
)
1978 || bfd_is_abs_section (output_section
)
1979 || bfd_is_und_section (output_section
)
1980 /* PR gas/3041 a.out relocs against weak symbols
1981 must be treated as if they were against externs. */
1982 || (sym
->flags
& BSF_WEAK
))
1984 if (bfd_abs_section_ptr
->symbol
== sym
)
1986 /* Whoops, looked like an abs symbol, but is
1987 really an offset from the abs section. */
1993 /* Fill in symbol. */
1995 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2000 /* Just an ordinary section. */
2002 r_index
= output_section
->target_index
;
2005 /* Now the fun stuff. */
2006 if (bfd_header_big_endian (abfd
))
2008 natptr
->r_index
[0] = r_index
>> 16;
2009 natptr
->r_index
[1] = r_index
>> 8;
2010 natptr
->r_index
[2] = r_index
;
2011 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2012 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2013 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2014 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2015 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2016 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
2020 natptr
->r_index
[2] = r_index
>> 16;
2021 natptr
->r_index
[1] = r_index
>> 8;
2022 natptr
->r_index
[0] = r_index
;
2023 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2024 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2025 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2026 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2027 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2028 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
2032 /* Extended stuff. */
2033 /* Output extended relocation information to a file in target byte order. */
2035 extern void NAME (aout
, swap_ext_reloc_out
)
2036 (bfd
*, arelent
*, struct reloc_ext_external
*);
2039 NAME (aout
, swap_ext_reloc_out
) (bfd
*abfd
,
2041 struct reloc_ext_external
*natptr
)
2045 unsigned int r_type
;
2047 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2048 asection
*output_section
= sym
->section
->output_section
;
2050 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2052 r_type
= (unsigned int) g
->howto
->type
;
2054 r_addend
= g
->addend
;
2055 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2056 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2058 /* If this relocation is relative to a symbol then set the
2059 r_index to the symbols index, and the r_extern bit.
2061 Absolute symbols can come in in two ways, either as an offset
2062 from the abs section, or as a symbol which has an abs value.
2063 check for that here. */
2064 if (bfd_is_abs_section (bfd_get_section (sym
)))
2069 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2071 if (bfd_is_und_section (bfd_get_section (sym
))
2072 || (sym
->flags
& BSF_GLOBAL
) != 0)
2076 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2080 /* Just an ordinary section. */
2082 r_index
= output_section
->target_index
;
2085 /* Now the fun stuff. */
2086 if (bfd_header_big_endian (abfd
))
2088 natptr
->r_index
[0] = r_index
>> 16;
2089 natptr
->r_index
[1] = r_index
>> 8;
2090 natptr
->r_index
[2] = r_index
;
2091 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2092 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2096 natptr
->r_index
[2] = r_index
>> 16;
2097 natptr
->r_index
[1] = r_index
>> 8;
2098 natptr
->r_index
[0] = r_index
;
2099 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2100 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
));
2103 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2106 /* BFD deals internally with all things based from the section they're
2107 in. so, something in 10 bytes into a text section with a base of
2108 50 would have a symbol (.text+10) and know .text vma was 50.
2110 Aout keeps all it's symbols based from zero, so the symbol would
2111 contain 60. This macro subs the base of each section from the value
2112 to give the true offset from the section. */
2114 #define MOVE_ADDRESS(ad) \
2117 /* Undefined symbol. */ \
2118 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2119 cache_ptr->addend = ad; \
2123 /* Defined, section relative. Replace symbol with pointer to \
2124 symbol which points to section. */ \
2128 case N_TEXT | N_EXT: \
2129 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2130 cache_ptr->addend = ad - su->textsec->vma; \
2133 case N_DATA | N_EXT: \
2134 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2135 cache_ptr->addend = ad - su->datasec->vma; \
2138 case N_BSS | N_EXT: \
2139 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2140 cache_ptr->addend = ad - su->bsssec->vma; \
2144 case N_ABS | N_EXT: \
2145 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2146 cache_ptr->addend = ad; \
2152 NAME (aout
, swap_ext_reloc_in
) (bfd
*abfd
,
2153 struct reloc_ext_external
*bytes
,
2156 bfd_size_type symcount
)
2158 unsigned int r_index
;
2160 unsigned int r_type
;
2161 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2163 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2165 /* Now the fun stuff. */
2166 if (bfd_header_big_endian (abfd
))
2168 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2169 | ((unsigned int) bytes
->r_index
[1] << 8)
2170 | bytes
->r_index
[2]);
2171 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2172 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2173 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
2177 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2178 | ((unsigned int) bytes
->r_index
[1] << 8)
2179 | bytes
->r_index
[0]);
2180 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2181 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2182 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2185 if (r_type
< TABLE_SIZE (howto_table_ext
))
2186 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2188 cache_ptr
->howto
= NULL
;
2190 /* Base relative relocs are always against the symbol table,
2191 regardless of the setting of r_extern. r_extern just reflects
2192 whether the symbol the reloc is against is local or global. */
2193 if (r_type
== (unsigned int) RELOC_BASE10
2194 || r_type
== (unsigned int) RELOC_BASE13
2195 || r_type
== (unsigned int) RELOC_BASE22
)
2198 if (r_extern
&& r_index
> symcount
)
2200 /* We could arrange to return an error, but it might be useful
2201 to see the file even if it is bad. */
2206 MOVE_ADDRESS (GET_SWORD (abfd
, bytes
->r_addend
));
2210 NAME (aout
, swap_std_reloc_in
) (bfd
*abfd
,
2211 struct reloc_std_external
*bytes
,
2214 bfd_size_type symcount
)
2216 unsigned int r_index
;
2218 unsigned int r_length
;
2220 int r_baserel
, r_jmptable
, r_relative
;
2221 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2222 unsigned int howto_idx
;
2224 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
2226 /* Now the fun stuff. */
2227 if (bfd_header_big_endian (abfd
))
2229 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2230 | ((unsigned int) bytes
->r_index
[1] << 8)
2231 | bytes
->r_index
[2]);
2232 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2233 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2234 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2235 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2236 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2237 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2238 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
2242 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2243 | ((unsigned int) bytes
->r_index
[1] << 8)
2244 | bytes
->r_index
[0]);
2245 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2246 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2247 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2248 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2249 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2250 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2251 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2254 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2255 + 16 * r_jmptable
+ 32 * r_relative
);
2256 if (howto_idx
< TABLE_SIZE (howto_table_std
))
2258 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2259 if (cache_ptr
->howto
->type
== (unsigned int) -1)
2260 cache_ptr
->howto
= NULL
;
2263 cache_ptr
->howto
= NULL
;
2265 /* Base relative relocs are always against the symbol table,
2266 regardless of the setting of r_extern. r_extern just reflects
2267 whether the symbol the reloc is against is local or global. */
2271 if (r_extern
&& r_index
> symcount
)
2273 /* We could arrange to return an error, but it might be useful
2274 to see the file even if it is bad. */
2282 /* Read and swap the relocs for a section. */
2285 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
2287 bfd_size_type count
;
2288 bfd_size_type reloc_size
;
2290 arelent
*reloc_cache
;
2292 unsigned int counter
= 0;
2296 if (asect
->relocation
)
2299 if (asect
->flags
& SEC_CONSTRUCTOR
)
2302 if (asect
== obj_datasec (abfd
))
2303 reloc_size
= exec_hdr (abfd
)->a_drsize
;
2304 else if (asect
== obj_textsec (abfd
))
2305 reloc_size
= exec_hdr (abfd
)->a_trsize
;
2306 else if (asect
== obj_bsssec (abfd
))
2310 bfd_set_error (bfd_error_invalid_operation
);
2314 if (reloc_size
== 0)
2315 return TRUE
; /* Nothing to be done. */
2317 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2320 each_size
= obj_reloc_entry_size (abfd
);
2322 count
= reloc_size
/ each_size
;
2324 return TRUE
; /* Nothing to be done. */
2326 amt
= count
* sizeof (arelent
);
2327 reloc_cache
= (arelent
*) bfd_zmalloc (amt
);
2328 if (reloc_cache
== NULL
)
2331 relocs
= bfd_malloc (reloc_size
);
2338 if (bfd_bread (relocs
, reloc_size
, abfd
) != reloc_size
)
2345 cache_ptr
= reloc_cache
;
2346 if (each_size
== RELOC_EXT_SIZE
)
2348 struct reloc_ext_external
*rptr
= (struct reloc_ext_external
*) relocs
;
2350 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2351 MY_swap_ext_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2352 (bfd_size_type
) bfd_get_symcount (abfd
));
2356 struct reloc_std_external
*rptr
= (struct reloc_std_external
*) relocs
;
2358 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2359 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2360 (bfd_size_type
) bfd_get_symcount (abfd
));
2365 asect
->relocation
= reloc_cache
;
2366 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2371 /* Write out a relocation section into an object file. */
2374 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2377 unsigned char *native
, *natptr
;
2380 unsigned int count
= section
->reloc_count
;
2381 bfd_size_type natsize
;
2383 if (count
== 0 || section
->orelocation
== NULL
)
2386 each_size
= obj_reloc_entry_size (abfd
);
2387 natsize
= (bfd_size_type
) each_size
* count
;
2388 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2392 generic
= section
->orelocation
;
2394 if (each_size
== RELOC_EXT_SIZE
)
2396 for (natptr
= native
;
2398 --count
, natptr
+= each_size
, ++generic
)
2400 /* PR 20921: If the howto field has not been initialised then skip
2402 PR 20929: Similarly for the symbol field. */
2403 if ((*generic
)->howto
== NULL
2404 || (*generic
)->sym_ptr_ptr
== NULL
)
2406 bfd_set_error (bfd_error_invalid_operation
);
2407 _bfd_error_handler (_("\
2408 %B: attempt to write out unknown reloc type"), abfd
);
2411 MY_swap_ext_reloc_out (abfd
, *generic
,
2412 (struct reloc_ext_external
*) natptr
);
2417 for (natptr
= native
;
2419 --count
, natptr
+= each_size
, ++generic
)
2421 if ((*generic
)->howto
== NULL
2422 || (*generic
)->sym_ptr_ptr
== NULL
)
2424 bfd_set_error (bfd_error_invalid_operation
);
2425 _bfd_error_handler (_("\
2426 %B: attempt to write out unknown reloc type"), abfd
);
2429 MY_swap_std_reloc_out (abfd
, *generic
,
2430 (struct reloc_std_external
*) natptr
);
2434 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2436 bfd_release (abfd
, native
);
2439 bfd_release (abfd
, native
);
2444 /* This is stupid. This function should be a boolean predicate. */
2447 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2452 arelent
*tblptr
= section
->relocation
;
2455 if (section
== obj_bsssec (abfd
))
2461 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
) (abfd
, section
, symbols
)))
2464 if (section
->flags
& SEC_CONSTRUCTOR
)
2466 arelent_chain
*chain
= section
->constructor_chain
;
2467 for (count
= 0; count
< section
->reloc_count
; count
++)
2469 *relptr
++ = &chain
->relent
;
2470 chain
= chain
->next
;
2475 tblptr
= section
->relocation
;
2477 for (count
= 0; count
++ < section
->reloc_count
; )
2479 *relptr
++ = tblptr
++;
2484 return section
->reloc_count
;
2488 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2490 if (bfd_get_format (abfd
) != bfd_object
)
2492 bfd_set_error (bfd_error_invalid_operation
);
2496 if (asect
->flags
& SEC_CONSTRUCTOR
)
2497 return sizeof (arelent
*) * (asect
->reloc_count
+ 1);
2499 if (asect
== obj_datasec (abfd
))
2500 return sizeof (arelent
*)
2501 * ((exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
))
2504 if (asect
== obj_textsec (abfd
))
2505 return sizeof (arelent
*)
2506 * ((exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
))
2509 if (asect
== obj_bsssec (abfd
))
2510 return sizeof (arelent
*);
2512 if (asect
== obj_bsssec (abfd
))
2515 bfd_set_error (bfd_error_invalid_operation
);
2520 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2522 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2525 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2529 NAME (aout
, get_lineno
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2530 asymbol
*ignore_symbol ATTRIBUTE_UNUSED
)
2536 NAME (aout
, get_symbol_info
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2540 bfd_symbol_info (symbol
, ret
);
2542 if (ret
->type
== '?')
2544 int type_code
= aout_symbol (symbol
)->type
& 0xff;
2545 const char *stab_name
= bfd_get_stab_name (type_code
);
2546 static char buf
[10];
2548 if (stab_name
== NULL
)
2550 sprintf (buf
, "(%d)", type_code
);
2554 ret
->stab_type
= type_code
;
2555 ret
->stab_other
= (unsigned) (aout_symbol (symbol
)->other
& 0xff);
2556 ret
->stab_desc
= (unsigned) (aout_symbol (symbol
)->desc
& 0xffff);
2557 ret
->stab_name
= stab_name
;
2562 NAME (aout
, print_symbol
) (bfd
*abfd
,
2565 bfd_print_symbol_type how
)
2567 FILE *file
= (FILE *)afile
;
2571 case bfd_print_symbol_name
:
2573 fprintf (file
,"%s", symbol
->name
);
2575 case bfd_print_symbol_more
:
2576 fprintf (file
,"%4x %2x %2x",
2577 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2578 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2579 (unsigned) (aout_symbol (symbol
)->type
));
2581 case bfd_print_symbol_all
:
2583 const char *section_name
= symbol
->section
->name
;
2585 bfd_print_symbol_vandf (abfd
, (void *)file
, symbol
);
2587 fprintf (file
," %-5s %04x %02x %02x",
2589 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2590 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2591 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2593 fprintf (file
," %s", symbol
->name
);
2599 /* If we don't have to allocate more than 1MB to hold the generic
2600 symbols, we use the generic minisymbol methord: it's faster, since
2601 it only translates the symbols once, not multiple times. */
2602 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2604 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2605 symbols. The minisymbol_to_symbol function translates these into
2606 BFD asymbol structures. */
2609 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2610 bfd_boolean dynamic
,
2612 unsigned int *sizep
)
2615 /* We could handle the dynamic symbols here as well, but it's
2616 easier to hand them off. */
2617 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2619 if (! aout_get_external_symbols (abfd
))
2622 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2623 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2625 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2627 /* By passing the external symbols back from this routine, we are
2628 giving up control over the memory block. Clear
2629 obj_aout_external_syms, so that we do not try to free it
2631 obj_aout_external_syms (abfd
) = NULL
;
2633 *sizep
= EXTERNAL_NLIST_SIZE
;
2634 return obj_aout_external_sym_count (abfd
);
2637 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2638 unmodified a.out symbol. The SYM argument is a structure returned
2639 by bfd_make_empty_symbol, which we fill in here. */
2642 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2643 bfd_boolean dynamic
,
2644 const void * minisym
,
2648 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2649 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2651 memset (sym
, 0, sizeof (aout_symbol_type
));
2653 /* We call translate_symbol_table to translate a single symbol. */
2654 if (! (NAME (aout
, translate_symbol_table
)
2656 (aout_symbol_type
*) sym
,
2657 (struct external_nlist
*) minisym
,
2659 obj_aout_external_strings (abfd
),
2660 obj_aout_external_string_size (abfd
),
2667 /* Provided a BFD, a section and an offset into the section, calculate
2668 and return the name of the source file and the line nearest to the
2672 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2676 const char **filename_ptr
,
2677 const char **functionname_ptr
,
2678 unsigned int *line_ptr
,
2679 unsigned int *disriminator_ptr
)
2681 /* Run down the file looking for the filename, function and linenumber. */
2683 const char *directory_name
= NULL
;
2684 const char *main_file_name
= NULL
;
2685 const char *current_file_name
= NULL
;
2686 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2687 const char *line_directory_name
= NULL
; /* Value of directory_name at line number. */
2688 bfd_vma low_line_vma
= 0;
2689 bfd_vma low_func_vma
= 0;
2691 bfd_size_type filelen
, funclen
;
2694 *filename_ptr
= abfd
->filename
;
2695 *functionname_ptr
= NULL
;
2697 if (disriminator_ptr
)
2698 *disriminator_ptr
= 0;
2700 if (symbols
!= NULL
)
2702 for (p
= symbols
; *p
; p
++)
2704 aout_symbol_type
*q
= (aout_symbol_type
*) (*p
);
2709 /* If this looks like a file name symbol, and it comes after
2710 the line number we have found so far, but before the
2711 offset, then we have probably not found the right line
2713 if (q
->symbol
.value
<= offset
2714 && ((q
->symbol
.value
> low_line_vma
2715 && (line_file_name
!= NULL
2717 || (q
->symbol
.value
> low_func_vma
2720 const char *symname
;
2722 symname
= q
->symbol
.name
;
2723 if (strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2725 if (q
->symbol
.value
> low_line_vma
)
2728 line_file_name
= NULL
;
2730 if (q
->symbol
.value
> low_func_vma
)
2737 /* If this symbol is less than the offset, but greater than
2738 the line number we have found so far, then we have not
2739 found the right line number. */
2740 if (q
->symbol
.value
<= offset
)
2742 if (q
->symbol
.value
> low_line_vma
)
2745 line_file_name
= NULL
;
2747 if (q
->symbol
.value
> low_func_vma
)
2751 main_file_name
= current_file_name
= q
->symbol
.name
;
2752 /* Look ahead to next symbol to check if that too is an N_SO. */
2756 q
= (aout_symbol_type
*) (*p
);
2757 if (q
->type
!= (int)N_SO
)
2760 /* Found a second N_SO First is directory; second is filename. */
2761 directory_name
= current_file_name
;
2762 main_file_name
= current_file_name
= q
->symbol
.name
;
2763 if (obj_textsec (abfd
) != section
)
2767 current_file_name
= q
->symbol
.name
;
2774 /* We'll keep this if it resolves nearer than the one we have
2776 if (q
->symbol
.value
>= low_line_vma
2777 && q
->symbol
.value
<= offset
)
2779 *line_ptr
= q
->desc
;
2780 low_line_vma
= q
->symbol
.value
;
2781 line_file_name
= current_file_name
;
2782 line_directory_name
= directory_name
;
2787 /* We'll keep this if it is nearer than the one we have already. */
2788 if (q
->symbol
.value
>= low_func_vma
&&
2789 q
->symbol
.value
<= offset
)
2791 low_func_vma
= q
->symbol
.value
;
2792 func
= (asymbol
*)q
;
2794 else if (q
->symbol
.value
> offset
)
2805 main_file_name
= line_file_name
;
2806 directory_name
= line_directory_name
;
2809 if (main_file_name
== NULL
2810 || IS_ABSOLUTE_PATH (main_file_name
)
2811 || directory_name
== NULL
)
2814 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2819 funclen
= strlen (bfd_asymbol_name (func
));
2821 if (adata (abfd
).line_buf
!= NULL
)
2822 free (adata (abfd
).line_buf
);
2824 if (filelen
+ funclen
== 0)
2825 adata (abfd
).line_buf
= buf
= NULL
;
2828 buf
= (char *) bfd_malloc (filelen
+ funclen
+ 3);
2829 adata (abfd
).line_buf
= buf
;
2834 if (main_file_name
!= NULL
)
2836 if (IS_ABSOLUTE_PATH (main_file_name
) || directory_name
== NULL
)
2837 *filename_ptr
= main_file_name
;
2841 /* PR binutils/20891: In a corrupt input file both
2842 main_file_name and directory_name can be empty... */
2843 * filename_ptr
= NULL
;
2846 snprintf (buf
, filelen
+ 1, "%s%s", directory_name
,
2848 *filename_ptr
= buf
;
2856 const char *function
= func
->name
;
2861 /* PR binutils/20892: In a corrupt input file func can be empty. */
2862 * functionname_ptr
= NULL
;
2865 /* The caller expects a symbol name. We actually have a
2866 function name, without the leading underscore. Put the
2867 underscore back in, so that the caller gets a symbol name. */
2868 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2869 strcpy (buf
, function
);
2872 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2873 strcpy (buf
+ 1, function
);
2875 /* Have to remove : stuff. */
2876 colon
= strchr (buf
, ':');
2879 *functionname_ptr
= buf
;
2886 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2887 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2889 return adata (abfd
).exec_bytes_size
;
2892 /* Free all information we have cached for this BFD. We can always
2893 read it again later if we need it. */
2896 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2900 if (bfd_get_format (abfd
) != bfd_object
2901 || abfd
->tdata
.aout_data
== NULL
)
2904 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2905 BFCI_FREE (obj_aout_symbols (abfd
));
2907 obj_aout_external_syms (abfd
) = 0;
2908 bfd_free_window (&obj_aout_sym_window (abfd
));
2909 bfd_free_window (&obj_aout_string_window (abfd
));
2910 obj_aout_external_strings (abfd
) = 0;
2912 BFCI_FREE (obj_aout_external_syms (abfd
));
2913 BFCI_FREE (obj_aout_external_strings (abfd
));
2915 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2916 BFCI_FREE (o
->relocation
);
2922 /* a.out link code. */
2924 /* Routine to create an entry in an a.out link hash table. */
2926 struct bfd_hash_entry
*
2927 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2928 struct bfd_hash_table
*table
,
2931 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2933 /* Allocate the structure if it has not already been allocated by a
2936 ret
= (struct aout_link_hash_entry
*) bfd_hash_allocate (table
,
2941 /* Call the allocation method of the superclass. */
2942 ret
= ((struct aout_link_hash_entry
*)
2943 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2947 /* Set local fields. */
2948 ret
->written
= FALSE
;
2952 return (struct bfd_hash_entry
*) ret
;
2955 /* Initialize an a.out link hash table. */
2958 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2960 struct bfd_hash_entry
*(*newfunc
)
2961 (struct bfd_hash_entry
*, struct bfd_hash_table
*,
2963 unsigned int entsize
)
2965 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2968 /* Create an a.out link hash table. */
2970 struct bfd_link_hash_table
*
2971 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2973 struct aout_link_hash_table
*ret
;
2974 bfd_size_type amt
= sizeof (* ret
);
2976 ret
= (struct aout_link_hash_table
*) bfd_malloc (amt
);
2980 if (!NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2981 NAME (aout
, link_hash_newfunc
),
2982 sizeof (struct aout_link_hash_entry
)))
2990 /* Add all symbols from an object file to the hash table. */
2993 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2995 bfd_boolean (*add_one_symbol
)
2996 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
2997 bfd_vma
, const char *, bfd_boolean
, bfd_boolean
,
2998 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_get_section_vma (abfd
, 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_get_section_vma (abfd
, section
);
3112 section
= obj_bsssec (abfd
);
3113 value
-= bfd_get_section_vma (abfd
, 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_get_section_vma (abfd
, section
);
3141 case N_SETD
: case N_SETD
| N_EXT
:
3142 section
= obj_datasec (abfd
);
3143 flags
|= BSF_CONSTRUCTOR
;
3144 value
-= bfd_get_section_vma (abfd
, section
);
3146 case N_SETB
: case N_SETB
| N_EXT
:
3147 section
= obj_bsssec (abfd
);
3148 flags
|= BSF_CONSTRUCTOR
;
3149 value
-= bfd_get_section_vma (abfd
, 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_get_section_vma (abfd
, section
);
3179 section
= obj_datasec (abfd
);
3180 value
-= bfd_get_section_vma (abfd
, section
);
3184 section
= obj_bsssec (abfd
);
3185 value
-= bfd_get_section_vma (abfd
, 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
,
3275 bfd_boolean
*pneeded
,
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_text
:
3355 skip
= (type
== (N_TEXT
| N_EXT
));
3357 case bfd_link_common_skip_data
:
3358 skip
= (type
== (N_DATA
| N_EXT
));
3361 case bfd_link_common_skip_all
:
3370 if (!(*info
->callbacks
3371 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3377 if (type
== (N_UNDF
| N_EXT
))
3381 value
= GET_WORD (abfd
, p
->e_value
);
3384 /* This symbol is common in the object from the archive
3386 if (h
->type
== bfd_link_hash_undefined
)
3391 symbfd
= h
->u
.undef
.abfd
;
3394 /* This symbol was created as undefined from
3395 outside BFD. We assume that we should link
3396 in the object file. This is done for the -u
3397 option in the linker. */
3398 if (!(*info
->callbacks
3399 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3404 /* Turn the current link symbol into a common
3405 symbol. It is already on the undefs list. */
3406 h
->type
= bfd_link_hash_common
;
3407 h
->u
.c
.p
= (struct bfd_link_hash_common_entry
*)
3408 bfd_hash_allocate (&info
->hash
->table
,
3409 sizeof (struct bfd_link_hash_common_entry
));
3410 if (h
->u
.c
.p
== NULL
)
3413 h
->u
.c
.size
= value
;
3415 /* FIXME: This isn't quite right. The maximum
3416 alignment of a common symbol should be set by the
3417 architecture of the output file, not of the input
3419 power
= bfd_log2 (value
);
3420 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3421 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3422 h
->u
.c
.p
->alignment_power
= power
;
3424 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3429 /* Adjust the size of the common symbol if
3431 if (value
> h
->u
.c
.size
)
3432 h
->u
.c
.size
= value
;
3442 /* This symbol is weak but defined. We must pull it in if
3443 the current link symbol is undefined, but we don't want
3444 it if the current link symbol is common. */
3445 if (h
->type
== bfd_link_hash_undefined
)
3447 if (!(*info
->callbacks
3448 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3456 /* We do not need this object file. */
3459 /* Check a single archive element to see if we need to include it in
3460 the link. *PNEEDED is set according to whether this element is
3461 needed in the link or not. This is called from
3462 _bfd_generic_link_add_archive_symbols. */
3465 aout_link_check_archive_element (bfd
*abfd
,
3466 struct bfd_link_info
*info
,
3467 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3468 const char *name ATTRIBUTE_UNUSED
,
3469 bfd_boolean
*pneeded
)
3474 if (!aout_get_external_symbols (abfd
))
3478 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
3484 /* Potentially, the add_archive_element hook may have set a
3485 substitute BFD for us. */
3488 if (!info
->keep_memory
3489 && !aout_link_free_symbols (oldbfd
))
3491 if (!aout_get_external_symbols (abfd
))
3494 if (!aout_link_add_symbols (abfd
, info
))
3498 if (!info
->keep_memory
|| !needed
)
3500 if (!aout_link_free_symbols (abfd
))
3507 /* Given an a.out BFD, add symbols to the global hash table as
3511 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
3513 switch (bfd_get_format (abfd
))
3516 return aout_link_add_object_symbols (abfd
, info
);
3518 return _bfd_generic_link_add_archive_symbols
3519 (abfd
, info
, aout_link_check_archive_element
);
3521 bfd_set_error (bfd_error_wrong_format
);
3526 /* A hash table used for header files with N_BINCL entries. */
3528 struct aout_link_includes_table
3530 struct bfd_hash_table root
;
3533 /* A linked list of totals that we have found for a particular header
3536 struct aout_link_includes_totals
3538 struct aout_link_includes_totals
*next
;
3542 /* An entry in the header file hash table. */
3544 struct aout_link_includes_entry
3546 struct bfd_hash_entry root
;
3547 /* List of totals we have found for this file. */
3548 struct aout_link_includes_totals
*totals
;
3551 /* Look up an entry in an the header file hash table. */
3553 #define aout_link_includes_lookup(table, string, create, copy) \
3554 ((struct aout_link_includes_entry *) \
3555 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3557 /* During the final link step we need to pass around a bunch of
3558 information, so we do it in an instance of this structure. */
3560 struct aout_final_link_info
3562 /* General link information. */
3563 struct bfd_link_info
*info
;
3566 /* Reloc file positions. */
3567 file_ptr treloff
, dreloff
;
3568 /* File position of symbols. */
3571 struct bfd_strtab_hash
*strtab
;
3572 /* Header file hash table. */
3573 struct aout_link_includes_table includes
;
3574 /* A buffer large enough to hold the contents of any section. */
3576 /* A buffer large enough to hold the relocs of any section. */
3578 /* A buffer large enough to hold the symbol map of any input BFD. */
3580 /* A buffer large enough to hold output symbols of any input BFD. */
3581 struct external_nlist
*output_syms
;
3584 /* The function to create a new entry in the header file hash table. */
3586 static struct bfd_hash_entry
*
3587 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3588 struct bfd_hash_table
*table
,
3591 struct aout_link_includes_entry
*ret
=
3592 (struct aout_link_includes_entry
*) entry
;
3594 /* Allocate the structure if it has not already been allocated by a
3597 ret
= (struct aout_link_includes_entry
*)
3598 bfd_hash_allocate (table
, sizeof (* ret
));
3602 /* Call the allocation method of the superclass. */
3603 ret
= ((struct aout_link_includes_entry
*)
3604 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3607 /* Set local fields. */
3611 return (struct bfd_hash_entry
*) ret
;
3614 /* Write out a symbol that was not associated with an a.out input
3618 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3620 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3621 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3625 struct external_nlist outsym
;
3629 if (h
->root
.type
== bfd_link_hash_warning
)
3631 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3632 if (h
->root
.type
== bfd_link_hash_new
)
3636 output_bfd
= flaginfo
->output_bfd
;
3638 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3640 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3641 (output_bfd
, flaginfo
->info
, h
)))
3643 /* FIXME: No way to handle errors. */
3653 /* An indx of -2 means the symbol must be written. */
3655 && (flaginfo
->info
->strip
== strip_all
3656 || (flaginfo
->info
->strip
== strip_some
3657 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3658 FALSE
, FALSE
) == NULL
)))
3661 switch (h
->root
.type
)
3664 case bfd_link_hash_warning
:
3666 /* Avoid variable not initialized warnings. */
3668 case bfd_link_hash_new
:
3669 /* This can happen for set symbols when sets are not being
3672 case bfd_link_hash_undefined
:
3673 type
= N_UNDF
| N_EXT
;
3676 case bfd_link_hash_defined
:
3677 case bfd_link_hash_defweak
:
3681 sec
= h
->root
.u
.def
.section
->output_section
;
3682 BFD_ASSERT (bfd_is_abs_section (sec
)
3683 || sec
->owner
== output_bfd
);
3684 if (sec
== obj_textsec (output_bfd
))
3685 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3686 else if (sec
== obj_datasec (output_bfd
))
3687 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3688 else if (sec
== obj_bsssec (output_bfd
))
3689 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3691 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3693 val
= (h
->root
.u
.def
.value
3695 + h
->root
.u
.def
.section
->output_offset
);
3698 case bfd_link_hash_common
:
3699 type
= N_UNDF
| N_EXT
;
3700 val
= h
->root
.u
.c
.size
;
3702 case bfd_link_hash_undefweak
:
3706 case bfd_link_hash_indirect
:
3707 /* We ignore these symbols, since the indirected symbol is
3708 already in the hash table. */
3712 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3713 H_PUT_8 (output_bfd
, 0, outsym
.e_other
);
3714 H_PUT_16 (output_bfd
, 0, outsym
.e_desc
);
3715 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3717 if (indx
== - (bfd_size_type
) 1)
3718 /* FIXME: No way to handle errors. */
3721 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3722 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3724 amt
= EXTERNAL_NLIST_SIZE
;
3725 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3726 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3727 /* FIXME: No way to handle errors. */
3730 flaginfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
3731 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3732 ++obj_aout_external_sym_count (output_bfd
);
3737 /* Handle a link order which is supposed to generate a reloc. */
3740 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3742 struct bfd_link_order
*p
)
3744 struct bfd_link_order_reloc
*pr
;
3747 reloc_howto_type
*howto
;
3748 file_ptr
*reloff_ptr
= NULL
;
3749 struct reloc_std_external srel
;
3750 struct reloc_ext_external erel
;
3756 if (p
->type
== bfd_section_reloc_link_order
)
3759 if (bfd_is_abs_section (pr
->u
.section
))
3760 r_index
= N_ABS
| N_EXT
;
3763 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3764 r_index
= pr
->u
.section
->target_index
;
3769 struct aout_link_hash_entry
*h
;
3771 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3773 h
= ((struct aout_link_hash_entry
*)
3774 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3775 pr
->u
.name
, FALSE
, FALSE
, TRUE
));
3781 /* We decided to strip this symbol, but it turns out that we
3782 can't. Note that we lose the other and desc information
3783 here. I don't think that will ever matter for a global
3787 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3793 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3794 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3799 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3802 bfd_set_error (bfd_error_bad_value
);
3806 if (o
== obj_textsec (flaginfo
->output_bfd
))
3807 reloff_ptr
= &flaginfo
->treloff
;
3808 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3809 reloff_ptr
= &flaginfo
->dreloff
;
3813 if (obj_reloc_entry_size (flaginfo
->output_bfd
) == RELOC_STD_SIZE
)
3816 MY_put_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3826 r_pcrel
= (int) howto
->pc_relative
;
3827 r_baserel
= (howto
->type
& 8) != 0;
3828 r_jmptable
= (howto
->type
& 16) != 0;
3829 r_relative
= (howto
->type
& 32) != 0;
3830 r_length
= howto
->size
;
3832 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3833 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3835 srel
.r_index
[0] = r_index
>> 16;
3836 srel
.r_index
[1] = r_index
>> 8;
3837 srel
.r_index
[2] = r_index
;
3839 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3840 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3841 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3842 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3843 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3844 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3848 srel
.r_index
[2] = r_index
>> 16;
3849 srel
.r_index
[1] = r_index
>> 8;
3850 srel
.r_index
[0] = r_index
;
3852 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3853 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3854 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3855 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3856 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3857 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3861 rel_ptr
= (void *) &srel
;
3863 /* We have to write the addend into the object file, since
3864 standard a.out relocs are in place. It would be more
3865 reliable if we had the current contents of the file here,
3866 rather than assuming zeroes, but we can't read the file since
3867 it was opened using bfd_openw. */
3868 if (pr
->addend
!= 0)
3871 bfd_reloc_status_type r
;
3875 size
= bfd_get_reloc_size (howto
);
3876 buf
= (bfd_byte
*) bfd_zmalloc (size
);
3877 if (buf
== NULL
&& size
!= 0)
3879 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3880 (bfd_vma
) pr
->addend
, buf
);
3886 case bfd_reloc_outofrange
:
3888 case bfd_reloc_overflow
:
3889 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3890 (flaginfo
->info
, NULL
,
3891 (p
->type
== bfd_section_reloc_link_order
3892 ? bfd_section_name (flaginfo
->output_bfd
,
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 bfd_boolean (*check_dynamic_reloc
)
3983 (struct bfd_link_info
*, bfd
*, asection
*,
3984 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
3987 bfd_boolean relocatable
;
3988 struct external_nlist
*syms
;
3990 struct aout_link_hash_entry
**sym_hashes
;
3992 bfd_size_type reloc_count
;
3993 struct reloc_std_external
*rel
;
3994 struct reloc_std_external
*rel_end
;
3996 output_bfd
= flaginfo
->output_bfd
;
3997 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
3999 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
4000 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4001 == output_bfd
->xvec
->header_byteorder
);
4003 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4004 syms
= obj_aout_external_syms (input_bfd
);
4005 strings
= obj_aout_external_strings (input_bfd
);
4006 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4007 symbol_map
= flaginfo
->symbol_map
;
4009 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4011 rel_end
= rel
+ reloc_count
;
4012 for (; rel
< rel_end
; rel
++)
4019 reloc_howto_type
*howto
;
4020 struct aout_link_hash_entry
*h
= NULL
;
4022 bfd_reloc_status_type r
;
4024 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4026 #ifdef MY_reloc_howto
4027 howto
= MY_reloc_howto (input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
4033 unsigned int howto_idx
;
4035 if (bfd_header_big_endian (input_bfd
))
4037 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4038 | ((unsigned int) rel
->r_index
[1] << 8)
4040 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4041 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4042 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4043 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4044 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4045 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4046 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4050 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4051 | ((unsigned int) rel
->r_index
[1] << 8)
4053 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4054 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4055 r_baserel
= (0 != (rel
->r_type
[0]
4056 & RELOC_STD_BITS_BASEREL_LITTLE
));
4057 r_jmptable
= (0 != (rel
->r_type
[0]
4058 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4059 r_relative
= (0 != (rel
->r_type
[0]
4060 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4061 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4062 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4065 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4066 + 16 * r_jmptable
+ 32 * r_relative
);
4067 if (howto_idx
< TABLE_SIZE (howto_table_std
))
4068 howto
= howto_table_std
+ howto_idx
;
4076 (*flaginfo
->info
->callbacks
->einfo
)
4077 (_("%P: %B: unexpected relocation type\n"), input_bfd
);
4078 bfd_set_error (bfd_error_bad_value
);
4084 /* We are generating a relocatable output file, and must
4085 modify the reloc accordingly. */
4088 /* If we know the symbol this relocation is against,
4089 convert it into a relocation against a section. This
4090 is what the native linker does. */
4091 h
= sym_hashes
[r_index
];
4093 && (h
->root
.type
== bfd_link_hash_defined
4094 || h
->root
.type
== bfd_link_hash_defweak
))
4096 asection
*output_section
;
4098 /* Change the r_extern value. */
4099 if (bfd_header_big_endian (output_bfd
))
4100 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4102 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4104 /* Compute a new r_index. */
4105 output_section
= h
->root
.u
.def
.section
->output_section
;
4106 if (output_section
== obj_textsec (output_bfd
))
4108 else if (output_section
== obj_datasec (output_bfd
))
4110 else if (output_section
== obj_bsssec (output_bfd
))
4115 /* Add the symbol value and the section VMA to the
4116 addend stored in the contents. */
4117 relocation
= (h
->root
.u
.def
.value
4118 + output_section
->vma
4119 + h
->root
.u
.def
.section
->output_offset
);
4123 /* We must change r_index according to the symbol
4125 r_index
= symbol_map
[r_index
];
4131 /* We decided to strip this symbol, but it
4132 turns out that we can't. Note that we
4133 lose the other and desc information here.
4134 I don't think that will ever matter for a
4140 if (!aout_link_write_other_symbol (&h
->root
.root
,
4150 name
= strings
+ GET_WORD (input_bfd
,
4151 syms
[r_index
].e_strx
);
4152 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4153 (flaginfo
->info
, name
,
4154 input_bfd
, input_section
, r_addr
);
4162 /* Write out the new r_index value. */
4163 if (bfd_header_big_endian (output_bfd
))
4165 rel
->r_index
[0] = r_index
>> 16;
4166 rel
->r_index
[1] = r_index
>> 8;
4167 rel
->r_index
[2] = r_index
;
4171 rel
->r_index
[2] = r_index
>> 16;
4172 rel
->r_index
[1] = r_index
>> 8;
4173 rel
->r_index
[0] = r_index
;
4180 /* This is a relocation against a section. We must
4181 adjust by the amount that the section moved. */
4182 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4183 relocation
= (section
->output_section
->vma
4184 + section
->output_offset
4188 /* Change the address of the relocation. */
4189 PUT_WORD (output_bfd
,
4190 r_addr
+ input_section
->output_offset
,
4193 /* Adjust a PC relative relocation by removing the reference
4194 to the original address in the section and including the
4195 reference to the new address. */
4197 relocation
-= (input_section
->output_section
->vma
4198 + input_section
->output_offset
4199 - input_section
->vma
);
4201 #ifdef MY_relocatable_reloc
4202 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4205 if (relocation
== 0)
4208 r
= MY_relocate_contents (howto
,
4209 input_bfd
, relocation
,
4216 /* We are generating an executable, and must do a full
4222 h
= sym_hashes
[r_index
];
4225 && (h
->root
.type
== bfd_link_hash_defined
4226 || h
->root
.type
== bfd_link_hash_defweak
))
4228 relocation
= (h
->root
.u
.def
.value
4229 + h
->root
.u
.def
.section
->output_section
->vma
4230 + h
->root
.u
.def
.section
->output_offset
);
4233 && h
->root
.type
== bfd_link_hash_undefweak
)
4245 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4246 relocation
= (section
->output_section
->vma
4247 + section
->output_offset
4250 relocation
+= input_section
->vma
;
4253 if (check_dynamic_reloc
!= NULL
)
4257 if (! ((*check_dynamic_reloc
)
4258 (flaginfo
->info
, input_bfd
, input_section
, h
,
4259 (void *) rel
, contents
, &skip
, &relocation
)))
4265 /* Now warn if a global symbol is undefined. We could not
4266 do this earlier, because check_dynamic_reloc might want
4267 to skip this reloc. */
4268 if (hundef
&& ! bfd_link_pic (flaginfo
->info
) && ! r_baserel
)
4273 name
= h
->root
.root
.string
;
4275 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4276 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4277 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4280 r
= MY_final_link_relocate (howto
,
4281 input_bfd
, input_section
,
4282 contents
, r_addr
, relocation
,
4286 if (r
!= bfd_reloc_ok
)
4291 case bfd_reloc_outofrange
:
4293 case bfd_reloc_overflow
:
4300 name
= strings
+ GET_WORD (input_bfd
,
4301 syms
[r_index
].e_strx
);
4306 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4307 name
= bfd_section_name (input_bfd
, s
);
4309 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4310 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4311 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
4321 /* Relocate an a.out section using extended a.out relocs. */
4324 aout_link_input_section_ext (struct aout_final_link_info
*flaginfo
,
4326 asection
*input_section
,
4327 struct reloc_ext_external
*relocs
,
4328 bfd_size_type rel_size
,
4331 bfd_boolean (*check_dynamic_reloc
)
4332 (struct bfd_link_info
*, bfd
*, asection
*,
4333 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4336 bfd_boolean relocatable
;
4337 struct external_nlist
*syms
;
4339 struct aout_link_hash_entry
**sym_hashes
;
4341 bfd_size_type reloc_count
;
4342 struct reloc_ext_external
*rel
;
4343 struct reloc_ext_external
*rel_end
;
4345 output_bfd
= flaginfo
->output_bfd
;
4346 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4348 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4349 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4350 == output_bfd
->xvec
->header_byteorder
);
4352 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4353 syms
= obj_aout_external_syms (input_bfd
);
4354 strings
= obj_aout_external_strings (input_bfd
);
4355 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4356 symbol_map
= flaginfo
->symbol_map
;
4358 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4360 rel_end
= rel
+ reloc_count
;
4361 for (; rel
< rel_end
; rel
++)
4366 unsigned int r_type
;
4368 struct aout_link_hash_entry
*h
= NULL
;
4369 asection
*r_section
= NULL
;
4372 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4374 if (bfd_header_big_endian (input_bfd
))
4376 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4377 | ((unsigned int) rel
->r_index
[1] << 8)
4379 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4380 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4381 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4385 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4386 | ((unsigned int) rel
->r_index
[1] << 8)
4388 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4389 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4390 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4393 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4395 if (r_type
>= TABLE_SIZE (howto_table_ext
))
4397 (*flaginfo
->info
->callbacks
->einfo
)
4398 (_("%P: %B: unexpected relocation type\n"), input_bfd
);
4399 bfd_set_error (bfd_error_bad_value
);
4405 /* We are generating a relocatable output file, and must
4406 modify the reloc accordingly. */
4408 || r_type
== (unsigned int) RELOC_BASE10
4409 || r_type
== (unsigned int) RELOC_BASE13
4410 || r_type
== (unsigned int) RELOC_BASE22
)
4412 /* If we know the symbol this relocation is against,
4413 convert it into a relocation against a section. This
4414 is what the native linker does. */
4415 if (r_type
== (unsigned int) RELOC_BASE10
4416 || r_type
== (unsigned int) RELOC_BASE13
4417 || r_type
== (unsigned int) RELOC_BASE22
)
4420 h
= sym_hashes
[r_index
];
4422 && (h
->root
.type
== bfd_link_hash_defined
4423 || h
->root
.type
== bfd_link_hash_defweak
))
4425 asection
*output_section
;
4427 /* Change the r_extern value. */
4428 if (bfd_header_big_endian (output_bfd
))
4429 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4431 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4433 /* Compute a new r_index. */
4434 output_section
= h
->root
.u
.def
.section
->output_section
;
4435 if (output_section
== obj_textsec (output_bfd
))
4437 else if (output_section
== obj_datasec (output_bfd
))
4439 else if (output_section
== obj_bsssec (output_bfd
))
4444 /* Add the symbol value and the section VMA to the
4446 relocation
= (h
->root
.u
.def
.value
4447 + output_section
->vma
4448 + h
->root
.u
.def
.section
->output_offset
);
4450 /* Now RELOCATION is the VMA of the final
4451 destination. If this is a PC relative reloc,
4452 then ADDEND is the negative of the source VMA.
4453 We want to set ADDEND to the difference between
4454 the destination VMA and the source VMA, which
4455 means we must adjust RELOCATION by the change in
4456 the source VMA. This is done below. */
4460 /* We must change r_index according to the symbol
4462 r_index
= symbol_map
[r_index
];
4468 /* We decided to strip this symbol, but it
4469 turns out that we can't. Note that we
4470 lose the other and desc information here.
4471 I don't think that will ever matter for a
4477 if (!aout_link_write_other_symbol (&h
->root
.root
,
4487 name
= strings
+ GET_WORD (input_bfd
,
4488 syms
[r_index
].e_strx
);
4489 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4490 (flaginfo
->info
, name
,
4491 input_bfd
, input_section
, r_addr
);
4498 /* If this is a PC relative reloc, then the addend
4499 is the negative of the source VMA. We must
4500 adjust it by the change in the source VMA. This
4504 /* Write out the new r_index value. */
4505 if (bfd_header_big_endian (output_bfd
))
4507 rel
->r_index
[0] = r_index
>> 16;
4508 rel
->r_index
[1] = r_index
>> 8;
4509 rel
->r_index
[2] = r_index
;
4513 rel
->r_index
[2] = r_index
>> 16;
4514 rel
->r_index
[1] = r_index
>> 8;
4515 rel
->r_index
[0] = r_index
;
4520 /* This is a relocation against a section. We must
4521 adjust by the amount that the section moved. */
4522 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4523 relocation
= (r_section
->output_section
->vma
4524 + r_section
->output_offset
4527 /* If this is a PC relative reloc, then the addend is
4528 the difference in VMA between the destination and the
4529 source. We have just adjusted for the change in VMA
4530 of the destination, so we must also adjust by the
4531 change in VMA of the source. This is done below. */
4534 /* As described above, we must always adjust a PC relative
4535 reloc by the change in VMA of the source. However, if
4536 pcrel_offset is set, then the addend does not include the
4537 location within the section, in which case we don't need
4538 to adjust anything. */
4539 if (howto_table_ext
[r_type
].pc_relative
4540 && ! howto_table_ext
[r_type
].pcrel_offset
)
4541 relocation
-= (input_section
->output_section
->vma
4542 + input_section
->output_offset
4543 - input_section
->vma
);
4545 /* Change the addend if necessary. */
4546 if (relocation
!= 0)
4547 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4549 /* Change the address of the relocation. */
4550 PUT_WORD (output_bfd
,
4551 r_addr
+ input_section
->output_offset
,
4557 bfd_reloc_status_type r
;
4559 /* We are generating an executable, and must do a full
4565 h
= sym_hashes
[r_index
];
4568 && (h
->root
.type
== bfd_link_hash_defined
4569 || h
->root
.type
== bfd_link_hash_defweak
))
4571 relocation
= (h
->root
.u
.def
.value
4572 + h
->root
.u
.def
.section
->output_section
->vma
4573 + h
->root
.u
.def
.section
->output_offset
);
4576 && h
->root
.type
== bfd_link_hash_undefweak
)
4584 else if (r_type
== (unsigned int) RELOC_BASE10
4585 || r_type
== (unsigned int) RELOC_BASE13
4586 || r_type
== (unsigned int) RELOC_BASE22
)
4588 struct external_nlist
*sym
;
4591 /* For base relative relocs, r_index is always an index
4592 into the symbol table, even if r_extern is 0. */
4593 sym
= syms
+ r_index
;
4594 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4595 if ((type
& N_TYPE
) == N_TEXT
4597 r_section
= obj_textsec (input_bfd
);
4598 else if ((type
& N_TYPE
) == N_DATA
4600 r_section
= obj_datasec (input_bfd
);
4601 else if ((type
& N_TYPE
) == N_BSS
4603 r_section
= obj_bsssec (input_bfd
);
4604 else if ((type
& N_TYPE
) == N_ABS
4606 r_section
= bfd_abs_section_ptr
;
4609 relocation
= (r_section
->output_section
->vma
4610 + r_section
->output_offset
4611 + (GET_WORD (input_bfd
, sym
->e_value
)
4616 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4618 /* If this is a PC relative reloc, then R_ADDEND is the
4619 difference between the two vmas, or
4620 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4622 old_dest_sec == section->vma
4624 old_src_sec == input_section->vma
4626 old_src_off == r_addr
4628 _bfd_final_link_relocate expects RELOCATION +
4629 R_ADDEND to be the VMA of the destination minus
4630 r_addr (the minus r_addr is because this relocation
4631 is not pcrel_offset, which is a bit confusing and
4632 should, perhaps, be changed), or
4635 new_dest_sec == output_section->vma + output_offset
4636 We arrange for this to happen by setting RELOCATION to
4637 new_dest_sec + old_src_sec - old_dest_sec
4639 If this is not a PC relative reloc, then R_ADDEND is
4640 simply the VMA of the destination, so we set
4641 RELOCATION to the change in the destination VMA, or
4642 new_dest_sec - old_dest_sec
4644 relocation
= (r_section
->output_section
->vma
4645 + r_section
->output_offset
4647 if (howto_table_ext
[r_type
].pc_relative
)
4648 relocation
+= input_section
->vma
;
4651 if (check_dynamic_reloc
!= NULL
)
4655 if (! ((*check_dynamic_reloc
)
4656 (flaginfo
->info
, input_bfd
, input_section
, h
,
4657 (void *) rel
, contents
, &skip
, &relocation
)))
4663 /* Now warn if a global symbol is undefined. We could not
4664 do this earlier, because check_dynamic_reloc might want
4665 to skip this reloc. */
4667 && ! bfd_link_pic (flaginfo
->info
)
4668 && r_type
!= (unsigned int) RELOC_BASE10
4669 && r_type
!= (unsigned int) RELOC_BASE13
4670 && r_type
!= (unsigned int) RELOC_BASE22
)
4675 name
= h
->root
.root
.string
;
4677 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4678 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4679 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4682 if (r_type
!= (unsigned int) RELOC_SPARC_REV32
)
4683 r
= MY_final_link_relocate (howto_table_ext
+ r_type
,
4684 input_bfd
, input_section
,
4685 contents
, r_addr
, relocation
,
4691 x
= bfd_get_32 (input_bfd
, contents
+ r_addr
);
4692 x
= x
+ relocation
+ r_addend
;
4693 bfd_putl32 (/*input_bfd,*/ x
, contents
+ r_addr
);
4697 if (r
!= bfd_reloc_ok
)
4702 case bfd_reloc_outofrange
:
4704 case bfd_reloc_overflow
:
4711 || r_type
== (unsigned int) RELOC_BASE10
4712 || r_type
== (unsigned int) RELOC_BASE13
4713 || r_type
== (unsigned int) RELOC_BASE22
)
4714 name
= strings
+ GET_WORD (input_bfd
,
4715 syms
[r_index
].e_strx
);
4720 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4721 name
= bfd_section_name (input_bfd
, s
);
4723 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4724 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
,
4725 howto_table_ext
[r_type
].name
,
4726 r_addend
, input_bfd
, input_section
, r_addr
);
4737 /* Link an a.out section into the output file. */
4740 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
4742 asection
*input_section
,
4743 file_ptr
*reloff_ptr
,
4744 bfd_size_type rel_size
)
4746 bfd_size_type input_size
;
4749 /* Get the section contents. */
4750 input_size
= input_section
->size
;
4751 if (! bfd_get_section_contents (input_bfd
, input_section
,
4752 (void *) flaginfo
->contents
,
4753 (file_ptr
) 0, input_size
))
4756 /* Read in the relocs if we haven't already done it. */
4757 if (aout_section_data (input_section
) != NULL
4758 && aout_section_data (input_section
)->relocs
!= NULL
)
4759 relocs
= aout_section_data (input_section
)->relocs
;
4762 relocs
= flaginfo
->relocs
;
4765 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4766 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
4771 /* Relocate the section contents. */
4772 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4774 if (! aout_link_input_section_std (flaginfo
, input_bfd
, input_section
,
4775 (struct reloc_std_external
*) relocs
,
4776 rel_size
, flaginfo
->contents
))
4781 if (! aout_link_input_section_ext (flaginfo
, input_bfd
, input_section
,
4782 (struct reloc_ext_external
*) relocs
,
4783 rel_size
, flaginfo
->contents
))
4787 /* Write out the section contents. */
4788 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
4789 input_section
->output_section
,
4790 (void *) flaginfo
->contents
,
4791 (file_ptr
) input_section
->output_offset
,
4795 /* If we are producing relocatable output, the relocs were
4796 modified, and we now write them out. */
4797 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
4799 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4801 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
4803 *reloff_ptr
+= rel_size
;
4805 /* Assert that the relocs have not run into the symbols, and
4806 that if these are the text relocs they have not run into the
4808 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
4809 && (reloff_ptr
!= &flaginfo
->treloff
4811 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
4817 /* Adjust and write out the symbols for an a.out file. Set the new
4818 symbol indices into a symbol_map. */
4821 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4824 bfd_size_type sym_count
;
4826 enum bfd_link_strip strip
;
4827 enum bfd_link_discard discard
;
4828 struct external_nlist
*outsym
;
4829 bfd_size_type strtab_index
;
4830 struct external_nlist
*sym
;
4831 struct external_nlist
*sym_end
;
4832 struct aout_link_hash_entry
**sym_hash
;
4835 bfd_boolean skip_next
;
4837 output_bfd
= flaginfo
->output_bfd
;
4838 sym_count
= obj_aout_external_sym_count (input_bfd
);
4839 strings
= obj_aout_external_strings (input_bfd
);
4840 strip
= flaginfo
->info
->strip
;
4841 discard
= flaginfo
->info
->discard
;
4842 outsym
= flaginfo
->output_syms
;
4844 /* First write out a symbol for this object file, unless we are
4845 discarding such symbols. */
4846 if (strip
!= strip_all
4847 && (strip
!= strip_some
4848 || bfd_hash_lookup (flaginfo
->info
->keep_hash
, input_bfd
->filename
,
4849 FALSE
, FALSE
) != NULL
)
4850 && discard
!= discard_all
)
4852 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4853 H_PUT_8 (output_bfd
, 0, outsym
->e_other
);
4854 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4855 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4856 input_bfd
->filename
, FALSE
);
4857 if (strtab_index
== (bfd_size_type
) -1)
4859 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4860 PUT_WORD (output_bfd
,
4861 (bfd_get_section_vma (output_bfd
,
4862 obj_textsec (input_bfd
)->output_section
)
4863 + obj_textsec (input_bfd
)->output_offset
),
4865 ++obj_aout_external_sym_count (output_bfd
);
4871 sym
= obj_aout_external_syms (input_bfd
);
4872 sym_end
= sym
+ sym_count
;
4873 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4874 symbol_map
= flaginfo
->symbol_map
;
4875 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4876 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4880 struct aout_link_hash_entry
*h
;
4886 /* We set *symbol_map to 0 above for all symbols. If it has
4887 already been set to -1 for this symbol, it means that we are
4888 discarding it because it appears in a duplicate header file.
4889 See the N_BINCL code below. */
4890 if (*symbol_map
== -1)
4893 /* Initialize *symbol_map to -1, which means that the symbol was
4894 not copied into the output file. We will change it later if
4895 we do copy the symbol over. */
4898 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4899 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4905 /* Pass this symbol through. It is the target of an
4906 indirect or warning symbol. */
4907 val
= GET_WORD (input_bfd
, sym
->e_value
);
4912 /* Skip this symbol, which is the target of an indirect
4913 symbol that we have changed to no longer be an indirect
4920 struct aout_link_hash_entry
*hresolve
;
4922 /* We have saved the hash table entry for this symbol, if
4923 there is one. Note that we could just look it up again
4924 in the hash table, provided we first check that it is an
4928 /* Use the name from the hash table, in case the symbol was
4931 && h
->root
.type
!= bfd_link_hash_warning
)
4932 name
= h
->root
.root
.string
;
4934 /* If this is an indirect or warning symbol, then change
4935 hresolve to the base symbol. We also change *sym_hash so
4936 that the relocation routines relocate against the real
4939 if (h
!= (struct aout_link_hash_entry
*) NULL
4940 && (h
->root
.type
== bfd_link_hash_indirect
4941 || h
->root
.type
== bfd_link_hash_warning
))
4943 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4944 while (hresolve
->root
.type
== bfd_link_hash_indirect
4945 || hresolve
->root
.type
== bfd_link_hash_warning
)
4946 hresolve
= ((struct aout_link_hash_entry
*)
4947 hresolve
->root
.u
.i
.link
);
4948 *sym_hash
= hresolve
;
4951 /* If the symbol has already been written out, skip it. */
4955 if ((type
& N_TYPE
) == N_INDR
4956 || type
== N_WARNING
)
4958 *symbol_map
= h
->indx
;
4962 /* See if we are stripping this symbol. */
4968 case strip_debugger
:
4969 if ((type
& N_STAB
) != 0)
4973 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
4988 /* Get the value of the symbol. */
4989 if ((type
& N_TYPE
) == N_TEXT
4991 symsec
= obj_textsec (input_bfd
);
4992 else if ((type
& N_TYPE
) == N_DATA
4994 symsec
= obj_datasec (input_bfd
);
4995 else if ((type
& N_TYPE
) == N_BSS
4997 symsec
= obj_bsssec (input_bfd
);
4998 else if ((type
& N_TYPE
) == N_ABS
5000 symsec
= bfd_abs_section_ptr
;
5001 else if (((type
& N_TYPE
) == N_INDR
5002 && (hresolve
== NULL
5003 || (hresolve
->root
.type
!= bfd_link_hash_defined
5004 && hresolve
->root
.type
!= bfd_link_hash_defweak
5005 && hresolve
->root
.type
!= bfd_link_hash_common
)))
5006 || type
== N_WARNING
)
5008 /* Pass the next symbol through unchanged. The
5009 condition above for indirect symbols is so that if
5010 the indirect symbol was defined, we output it with
5011 the correct definition so the debugger will
5014 val
= GET_WORD (input_bfd
, sym
->e_value
);
5017 else if ((type
& N_STAB
) != 0)
5019 val
= GET_WORD (input_bfd
, sym
->e_value
);
5024 /* If we get here with an indirect symbol, it means that
5025 we are outputting it with a real definition. In such
5026 a case we do not want to output the next symbol,
5027 which is the target of the indirection. */
5028 if ((type
& N_TYPE
) == N_INDR
)
5033 /* We need to get the value from the hash table. We use
5034 hresolve so that if we have defined an indirect
5035 symbol we output the final definition. */
5038 switch (type
& N_TYPE
)
5041 symsec
= obj_textsec (input_bfd
);
5044 symsec
= obj_datasec (input_bfd
);
5047 symsec
= obj_bsssec (input_bfd
);
5050 symsec
= bfd_abs_section_ptr
;
5057 else if (hresolve
->root
.type
== bfd_link_hash_defined
5058 || hresolve
->root
.type
== bfd_link_hash_defweak
)
5060 asection
*input_section
;
5061 asection
*output_section
;
5063 /* This case usually means a common symbol which was
5064 turned into a defined symbol. */
5065 input_section
= hresolve
->root
.u
.def
.section
;
5066 output_section
= input_section
->output_section
;
5067 BFD_ASSERT (bfd_is_abs_section (output_section
)
5068 || output_section
->owner
== output_bfd
);
5069 val
= (hresolve
->root
.u
.def
.value
5070 + bfd_get_section_vma (output_bfd
, output_section
)
5071 + input_section
->output_offset
);
5073 /* Get the correct type based on the section. If
5074 this is a constructed set, force it to be
5075 globally visible. */
5084 if (output_section
== obj_textsec (output_bfd
))
5085 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5088 else if (output_section
== obj_datasec (output_bfd
))
5089 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5092 else if (output_section
== obj_bsssec (output_bfd
))
5093 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5097 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5101 else if (hresolve
->root
.type
== bfd_link_hash_common
)
5102 val
= hresolve
->root
.u
.c
.size
;
5103 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
5112 val
= (symsec
->output_section
->vma
5113 + symsec
->output_offset
5114 + (GET_WORD (input_bfd
, sym
->e_value
)
5117 /* If this is a global symbol set the written flag, and if
5118 it is a local symbol see if we should discard it. */
5122 h
->indx
= obj_aout_external_sym_count (output_bfd
);
5124 else if ((type
& N_TYPE
) != N_SETT
5125 && (type
& N_TYPE
) != N_SETD
5126 && (type
& N_TYPE
) != N_SETB
5127 && (type
& N_TYPE
) != N_SETA
)
5132 case discard_sec_merge
:
5135 if ((type
& N_STAB
) == 0
5136 && bfd_is_local_label_name (input_bfd
, name
))
5150 /* An N_BINCL symbol indicates the start of the stabs
5151 entries for a header file. We need to scan ahead to the
5152 next N_EINCL symbol, ignoring nesting, adding up all the
5153 characters in the symbol names, not including the file
5154 numbers in types (the first number after an open
5156 if (type
== (int) N_BINCL
)
5158 struct external_nlist
*incl_sym
;
5160 struct aout_link_includes_entry
*incl_entry
;
5161 struct aout_link_includes_totals
*t
;
5165 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
5169 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5170 if (incl_type
== (int) N_EINCL
)
5176 else if (incl_type
== (int) N_BINCL
)
5182 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
5183 for (; *s
!= '\0'; s
++)
5188 /* Skip the file number. */
5190 while (ISDIGIT (*s
))
5198 /* If we have already included a header file with the
5199 same value, then replace this one with an N_EXCL
5201 copy
= (bfd_boolean
) (! flaginfo
->info
->keep_memory
);
5202 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
5204 if (incl_entry
== NULL
)
5206 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
5207 if (t
->total
== val
)
5211 /* This is the first time we have seen this header
5212 file with this set of stabs strings. */
5213 t
= (struct aout_link_includes_totals
*)
5214 bfd_hash_allocate (&flaginfo
->includes
.root
,
5219 t
->next
= incl_entry
->totals
;
5220 incl_entry
->totals
= t
;
5226 /* This is a duplicate header file. We must change
5227 it to be an N_EXCL entry, and mark all the
5228 included symbols to prevent outputting them. */
5229 type
= (int) N_EXCL
;
5232 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
5234 incl_sym
++, incl_map
++)
5238 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5239 if (incl_type
== (int) N_EINCL
)
5248 else if (incl_type
== (int) N_BINCL
)
5257 /* Copy this symbol into the list of symbols we are going to
5259 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
5260 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_other
), outsym
->e_other
);
5261 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
5263 if (! flaginfo
->info
->keep_memory
)
5265 /* name points into a string table which we are going to
5266 free. If there is a hash table entry, use that string.
5267 Otherwise, copy name into memory. */
5269 name
= h
->root
.root
.string
;
5273 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
5275 if (strtab_index
== (bfd_size_type
) -1)
5277 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
5278 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
5279 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
5280 ++obj_aout_external_sym_count (output_bfd
);
5284 /* Write out the output symbols we have just constructed. */
5285 if (outsym
> flaginfo
->output_syms
)
5287 bfd_size_type outsym_size
;
5289 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
5291 outsym_size
= outsym
- flaginfo
->output_syms
;
5292 outsym_size
*= EXTERNAL_NLIST_SIZE
;
5293 if (bfd_bwrite ((void *) flaginfo
->output_syms
, outsym_size
, output_bfd
)
5296 flaginfo
->symoff
+= outsym_size
;
5302 /* Link an a.out input BFD into the output file. */
5305 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
5307 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
5309 /* If this is a dynamic object, it may need special handling. */
5310 if ((input_bfd
->flags
& DYNAMIC
) != 0
5311 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
5312 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
5313 (flaginfo
->info
, input_bfd
));
5315 /* Get the symbols. We probably have them already, unless
5316 flaginfo->info->keep_memory is FALSE. */
5317 if (! aout_get_external_symbols (input_bfd
))
5320 /* Write out the symbols and get a map of the new indices. The map
5321 is placed into flaginfo->symbol_map. */
5322 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
5325 /* Relocate and write out the sections. These functions use the
5326 symbol map created by aout_link_write_symbols. The linker_mark
5327 field will be set if these sections are to be included in the
5328 link, which will normally be the case. */
5329 if (obj_textsec (input_bfd
)->linker_mark
)
5331 if (! aout_link_input_section (flaginfo
, input_bfd
,
5332 obj_textsec (input_bfd
),
5334 exec_hdr (input_bfd
)->a_trsize
))
5337 if (obj_datasec (input_bfd
)->linker_mark
)
5339 if (! aout_link_input_section (flaginfo
, input_bfd
,
5340 obj_datasec (input_bfd
),
5342 exec_hdr (input_bfd
)->a_drsize
))
5346 /* If we are not keeping memory, we don't need the symbols any
5347 longer. We still need them if we are keeping memory, because the
5348 strings in the hash table point into them. */
5349 if (! flaginfo
->info
->keep_memory
)
5351 if (! aout_link_free_symbols (input_bfd
))
5358 /* Do the final link step. This is called on the output BFD. The
5359 INFO structure should point to a list of BFDs linked through the
5360 link.next field which can be used to find each BFD which takes part
5361 in the output. Also, each section in ABFD should point to a list
5362 of bfd_link_order structures which list all the input sections for
5363 the output section. */
5366 NAME (aout
, final_link
) (bfd
*abfd
,
5367 struct bfd_link_info
*info
,
5368 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
5370 struct aout_final_link_info aout_info
;
5371 bfd_boolean includes_hash_initialized
= FALSE
;
5373 bfd_size_type trsize
, drsize
;
5374 bfd_size_type max_contents_size
;
5375 bfd_size_type max_relocs_size
;
5376 bfd_size_type max_sym_count
;
5377 struct bfd_link_order
*p
;
5379 bfd_boolean have_link_order_relocs
;
5381 if (bfd_link_pic (info
))
5382 abfd
->flags
|= DYNAMIC
;
5384 aout_info
.info
= info
;
5385 aout_info
.output_bfd
= abfd
;
5386 aout_info
.contents
= NULL
;
5387 aout_info
.relocs
= NULL
;
5388 aout_info
.symbol_map
= NULL
;
5389 aout_info
.output_syms
= NULL
;
5391 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
5392 aout_link_includes_newfunc
,
5393 sizeof (struct aout_link_includes_entry
),
5396 includes_hash_initialized
= TRUE
;
5398 /* Figure out the largest section size. Also, if generating
5399 relocatable output, count the relocs. */
5402 max_contents_size
= 0;
5403 max_relocs_size
= 0;
5405 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5409 if (bfd_link_relocatable (info
))
5411 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5413 trsize
+= exec_hdr (sub
)->a_trsize
;
5414 drsize
+= exec_hdr (sub
)->a_drsize
;
5418 /* FIXME: We need to identify the .text and .data sections
5419 and call get_reloc_upper_bound and canonicalize_reloc to
5420 work out the number of relocs needed, and then multiply
5421 by the reloc size. */
5423 /* xgettext:c-format */
5424 (_("%B: relocatable link from %s to %s not supported"),
5425 abfd
, sub
->xvec
->name
, abfd
->xvec
->name
);
5426 bfd_set_error (bfd_error_invalid_operation
);
5431 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5433 sz
= obj_textsec (sub
)->size
;
5434 if (sz
> max_contents_size
)
5435 max_contents_size
= sz
;
5436 sz
= obj_datasec (sub
)->size
;
5437 if (sz
> max_contents_size
)
5438 max_contents_size
= sz
;
5440 sz
= exec_hdr (sub
)->a_trsize
;
5441 if (sz
> max_relocs_size
)
5442 max_relocs_size
= sz
;
5443 sz
= exec_hdr (sub
)->a_drsize
;
5444 if (sz
> max_relocs_size
)
5445 max_relocs_size
= sz
;
5447 sz
= obj_aout_external_sym_count (sub
);
5448 if (sz
> max_sym_count
)
5453 if (bfd_link_relocatable (info
))
5455 if (obj_textsec (abfd
) != NULL
)
5456 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
5457 ->map_head
.link_order
)
5458 * obj_reloc_entry_size (abfd
));
5459 if (obj_datasec (abfd
) != NULL
)
5460 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
5461 ->map_head
.link_order
)
5462 * obj_reloc_entry_size (abfd
));
5465 exec_hdr (abfd
)->a_trsize
= trsize
;
5466 exec_hdr (abfd
)->a_drsize
= drsize
;
5468 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
5470 /* Adjust the section sizes and vmas according to the magic number.
5471 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5472 filepos for each section. */
5473 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
5476 /* The relocation and symbol file positions differ among a.out
5477 targets. We are passed a callback routine from the backend
5478 specific code to handle this.
5479 FIXME: At this point we do not know how much space the symbol
5480 table will require. This will not work for any (nonstandard)
5481 a.out target that needs to know the symbol table size before it
5482 can compute the relocation file positions. This may or may not
5483 be the case for the hp300hpux target, for example. */
5484 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
5486 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
5487 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
5488 obj_sym_filepos (abfd
) = aout_info
.symoff
;
5490 /* We keep a count of the symbols as we output them. */
5491 obj_aout_external_sym_count (abfd
) = 0;
5493 /* We accumulate the string table as we write out the symbols. */
5494 aout_info
.strtab
= _bfd_stringtab_init ();
5495 if (aout_info
.strtab
== NULL
)
5498 /* Allocate buffers to hold section contents and relocs. */
5499 aout_info
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5500 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
5501 aout_info
.symbol_map
= (int *) bfd_malloc (max_sym_count
* sizeof (int));
5502 aout_info
.output_syms
= (struct external_nlist
*)
5503 bfd_malloc ((max_sym_count
+ 1) * sizeof (struct external_nlist
));
5504 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
5505 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
5506 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
5507 || aout_info
.output_syms
== NULL
)
5510 /* If we have a symbol named __DYNAMIC, force it out now. This is
5511 required by SunOS. Doing this here rather than in sunos.c is a
5512 hack, but it's easier than exporting everything which would be
5515 struct aout_link_hash_entry
*h
;
5517 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
5518 FALSE
, FALSE
, FALSE
);
5520 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
5523 /* The most time efficient way to do the link would be to read all
5524 the input object files into memory and then sort out the
5525 information into the output file. Unfortunately, that will
5526 probably use too much memory. Another method would be to step
5527 through everything that composes the text section and write it
5528 out, and then everything that composes the data section and write
5529 it out, and then write out the relocs, and then write out the
5530 symbols. Unfortunately, that requires reading stuff from each
5531 input file several times, and we will not be able to keep all the
5532 input files open simultaneously, and reopening them will be slow.
5534 What we do is basically process one input file at a time. We do
5535 everything we need to do with an input file once--copy over the
5536 section contents, handle the relocation information, and write
5537 out the symbols--and then we throw away the information we read
5538 from it. This approach requires a lot of lseeks of the output
5539 file, which is unfortunate but still faster than reopening a lot
5542 We use the output_has_begun field of the input BFDs to see
5543 whether we have already handled it. */
5544 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5545 sub
->output_has_begun
= FALSE
;
5547 /* Mark all sections which are to be included in the link. This
5548 will normally be every section. We need to do this so that we
5549 can identify any sections which the linker has decided to not
5551 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5553 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5554 if (p
->type
== bfd_indirect_link_order
)
5555 p
->u
.indirect
.section
->linker_mark
= TRUE
;
5558 have_link_order_relocs
= FALSE
;
5559 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5561 for (p
= o
->map_head
.link_order
;
5565 if (p
->type
== bfd_indirect_link_order
5566 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
5567 == bfd_target_aout_flavour
))
5571 input_bfd
= p
->u
.indirect
.section
->owner
;
5572 if (! input_bfd
->output_has_begun
)
5574 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
5576 input_bfd
->output_has_begun
= TRUE
;
5579 else if (p
->type
== bfd_section_reloc_link_order
5580 || p
->type
== bfd_symbol_reloc_link_order
)
5582 /* These are handled below. */
5583 have_link_order_relocs
= TRUE
;
5587 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5593 /* Write out any symbols that we have not already written out. */
5594 bfd_hash_traverse (&info
->hash
->table
,
5595 aout_link_write_other_symbol
,
5598 /* Now handle any relocs we were asked to create by the linker.
5599 These did not come from any input file. We must do these after
5600 we have written out all the symbols, so that we know the symbol
5602 if (have_link_order_relocs
)
5604 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5606 for (p
= o
->map_head
.link_order
;
5610 if (p
->type
== bfd_section_reloc_link_order
5611 || p
->type
== bfd_symbol_reloc_link_order
)
5613 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
5620 if (aout_info
.contents
!= NULL
)
5622 free (aout_info
.contents
);
5623 aout_info
.contents
= NULL
;
5625 if (aout_info
.relocs
!= NULL
)
5627 free (aout_info
.relocs
);
5628 aout_info
.relocs
= NULL
;
5630 if (aout_info
.symbol_map
!= NULL
)
5632 free (aout_info
.symbol_map
);
5633 aout_info
.symbol_map
= NULL
;
5635 if (aout_info
.output_syms
!= NULL
)
5637 free (aout_info
.output_syms
);
5638 aout_info
.output_syms
= NULL
;
5640 if (includes_hash_initialized
)
5642 bfd_hash_table_free (&aout_info
.includes
.root
);
5643 includes_hash_initialized
= FALSE
;
5646 /* Finish up any dynamic linking we may be doing. */
5647 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
5649 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
5653 /* Update the header information. */
5654 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
5655 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
5656 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
5657 obj_textsec (abfd
)->reloc_count
=
5658 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
5659 obj_datasec (abfd
)->reloc_count
=
5660 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
5662 /* Write out the string table, unless there are no symbols. */
5663 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
5665 if (abfd
->symcount
> 0)
5667 if (!emit_stringtab (abfd
, aout_info
.strtab
))
5672 bfd_byte b
[BYTES_IN_WORD
];
5674 memset (b
, 0, BYTES_IN_WORD
);
5675 if (bfd_bwrite (b
, (bfd_size_type
) BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
5682 if (aout_info
.contents
!= NULL
)
5683 free (aout_info
.contents
);
5684 if (aout_info
.relocs
!= NULL
)
5685 free (aout_info
.relocs
);
5686 if (aout_info
.symbol_map
!= NULL
)
5687 free (aout_info
.symbol_map
);
5688 if (aout_info
.output_syms
!= NULL
)
5689 free (aout_info
.output_syms
);
5690 if (includes_hash_initialized
)
5691 bfd_hash_table_free (&aout_info
.includes
.root
);