1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2016 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_v9
742 || machine
== bfd_mach_sparc_v9a
743 || machine
== bfd_mach_sparc_v9b
744 || machine
== bfd_mach_sparc_v9c
745 || machine
== bfd_mach_sparc_v9d
746 || machine
== bfd_mach_sparc_v9e
747 || machine
== bfd_mach_sparc_v9v
748 || machine
== bfd_mach_sparc_v9m
)
749 arch_flags
= M_SPARC
;
750 else if (machine
== bfd_mach_sparc_sparclet
)
751 arch_flags
= M_SPARCLET
;
757 case 0: arch_flags
= M_68010
; break;
758 case bfd_mach_m68000
: arch_flags
= M_UNKNOWN
; *unknown
= FALSE
; break;
759 case bfd_mach_m68010
: arch_flags
= M_68010
; break;
760 case bfd_mach_m68020
: arch_flags
= M_68020
; break;
761 default: arch_flags
= M_UNKNOWN
; break;
767 || machine
== bfd_mach_i386_i386
768 || machine
== bfd_mach_i386_i386_intel_syntax
)
781 case bfd_mach_mips3000
:
782 case bfd_mach_mips3900
:
783 arch_flags
= M_MIPS1
;
785 case bfd_mach_mips6000
:
786 arch_flags
= M_MIPS2
;
788 case bfd_mach_mips4000
:
789 case bfd_mach_mips4010
:
790 case bfd_mach_mips4100
:
791 case bfd_mach_mips4300
:
792 case bfd_mach_mips4400
:
793 case bfd_mach_mips4600
:
794 case bfd_mach_mips4650
:
795 case bfd_mach_mips8000
:
796 case bfd_mach_mips9000
:
797 case bfd_mach_mips10000
:
798 case bfd_mach_mips12000
:
799 case bfd_mach_mips14000
:
800 case bfd_mach_mips16000
:
801 case bfd_mach_mips16
:
802 case bfd_mach_mipsisa32
:
803 case bfd_mach_mipsisa32r2
:
804 case bfd_mach_mipsisa32r3
:
805 case bfd_mach_mipsisa32r5
:
806 case bfd_mach_mipsisa32r6
:
808 case bfd_mach_mipsisa64
:
809 case bfd_mach_mipsisa64r2
:
810 case bfd_mach_mipsisa64r3
:
811 case bfd_mach_mipsisa64r5
:
812 case bfd_mach_mipsisa64r6
:
813 case bfd_mach_mips_sb1
:
814 case bfd_mach_mips_xlr
:
815 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
816 arch_flags
= M_MIPS2
;
819 arch_flags
= M_UNKNOWN
;
827 case 0: arch_flags
= M_NS32532
; break;
828 case 32032: arch_flags
= M_NS32032
; break;
829 case 32532: arch_flags
= M_NS32532
; break;
830 default: arch_flags
= M_UNKNOWN
; break;
839 if (machine
== 0 || machine
== 255)
848 arch_flags
= M_UNKNOWN
;
851 if (arch_flags
!= M_UNKNOWN
)
859 aout_@var{size}_set_arch_mach
862 bfd_boolean aout_@var{size}_set_arch_mach,
864 enum bfd_architecture arch,
865 unsigned long machine);
868 Set the architecture and the machine of the BFD @var{abfd} to the
869 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
870 can support the architecture required.
874 NAME (aout
, set_arch_mach
) (bfd
*abfd
,
875 enum bfd_architecture arch
,
876 unsigned long machine
)
878 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
881 if (arch
!= bfd_arch_unknown
)
885 NAME (aout
, machine_type
) (arch
, machine
, &unknown
);
890 /* Determine the size of a relocation entry. */
895 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
898 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
902 return (*aout_backend_info (abfd
)->set_sizes
) (abfd
);
906 adjust_o_magic (bfd
*abfd
, struct internal_exec
*execp
)
908 file_ptr pos
= adata (abfd
).exec_bytes_size
;
913 obj_textsec (abfd
)->filepos
= pos
;
914 if (!obj_textsec (abfd
)->user_set_vma
)
915 obj_textsec (abfd
)->vma
= vma
;
917 vma
= obj_textsec (abfd
)->vma
;
919 pos
+= obj_textsec (abfd
)->size
;
920 vma
+= obj_textsec (abfd
)->size
;
923 if (!obj_datasec (abfd
)->user_set_vma
)
925 obj_textsec (abfd
)->size
+= pad
;
928 obj_datasec (abfd
)->vma
= vma
;
931 vma
= obj_datasec (abfd
)->vma
;
932 obj_datasec (abfd
)->filepos
= pos
;
933 pos
+= obj_datasec (abfd
)->size
;
934 vma
+= obj_datasec (abfd
)->size
;
937 if (!obj_bsssec (abfd
)->user_set_vma
)
939 obj_datasec (abfd
)->size
+= pad
;
942 obj_bsssec (abfd
)->vma
= vma
;
946 /* The VMA of the .bss section is set by the VMA of the
947 .data section plus the size of the .data section. We may
948 need to add padding bytes to make this true. */
949 pad
= obj_bsssec (abfd
)->vma
- vma
;
952 obj_datasec (abfd
)->size
+= pad
;
956 obj_bsssec (abfd
)->filepos
= pos
;
958 /* Fix up the exec header. */
959 execp
->a_text
= obj_textsec (abfd
)->size
;
960 execp
->a_data
= obj_datasec (abfd
)->size
;
961 execp
->a_bss
= obj_bsssec (abfd
)->size
;
962 N_SET_MAGIC (execp
, OMAGIC
);
966 adjust_z_magic (bfd
*abfd
, struct internal_exec
*execp
)
968 bfd_size_type data_pad
, text_pad
;
970 const struct aout_backend_data
*abdp
;
971 /* TRUE if text includes exec header. */
974 abdp
= aout_backend_info (abfd
);
978 && (abdp
->text_includes_header
979 || obj_aout_subformat (abfd
) == q_magic_format
));
980 obj_textsec (abfd
)->filepos
= (ztih
981 ? adata (abfd
).exec_bytes_size
982 : adata (abfd
).zmagic_disk_block_size
);
983 if (! obj_textsec (abfd
)->user_set_vma
)
985 /* ?? Do we really need to check for relocs here? */
986 obj_textsec (abfd
)->vma
= ((abfd
->flags
& HAS_RELOC
)
989 ? (abdp
->default_text_vma
990 + adata (abfd
).exec_bytes_size
)
991 : abdp
->default_text_vma
));
996 /* The .text section is being loaded at an unusual address. We
997 may need to pad it such that the .data section starts at a page
1000 text_pad
= ((obj_textsec (abfd
)->filepos
- obj_textsec (abfd
)->vma
)
1001 & (adata (abfd
).page_size
- 1));
1003 text_pad
= ((- obj_textsec (abfd
)->vma
)
1004 & (adata (abfd
).page_size
- 1));
1007 /* Find start of data. */
1010 text_end
= obj_textsec (abfd
)->filepos
+ obj_textsec (abfd
)->size
;
1011 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1015 /* Note that if page_size == zmagic_disk_block_size, then
1016 filepos == page_size, and this case is the same as the ztih
1018 text_end
= obj_textsec (abfd
)->size
;
1019 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1020 text_end
+= obj_textsec (abfd
)->filepos
;
1022 obj_textsec (abfd
)->size
+= text_pad
;
1023 text_end
+= text_pad
;
1026 if (!obj_datasec (abfd
)->user_set_vma
)
1029 vma
= obj_textsec (abfd
)->vma
+ obj_textsec (abfd
)->size
;
1030 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1032 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
1034 asection
* text
= obj_textsec (abfd
);
1035 asection
* data
= obj_datasec (abfd
);
1037 text_pad
= data
->vma
- (text
->vma
+ text
->size
);
1038 /* Only pad the text section if the data
1039 section is going to be placed after it. */
1041 text
->size
+= text_pad
;
1043 obj_datasec (abfd
)->filepos
= (obj_textsec (abfd
)->filepos
1044 + obj_textsec (abfd
)->size
);
1046 /* Fix up exec header while we're at it. */
1047 execp
->a_text
= obj_textsec (abfd
)->size
;
1048 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
1049 execp
->a_text
+= adata (abfd
).exec_bytes_size
;
1050 if (obj_aout_subformat (abfd
) == q_magic_format
)
1051 N_SET_MAGIC (execp
, QMAGIC
);
1053 N_SET_MAGIC (execp
, ZMAGIC
);
1055 /* Spec says data section should be rounded up to page boundary. */
1056 obj_datasec (abfd
)->size
1057 = align_power (obj_datasec (abfd
)->size
,
1058 obj_bsssec (abfd
)->alignment_power
);
1059 execp
->a_data
= BFD_ALIGN (obj_datasec (abfd
)->size
,
1060 adata (abfd
).page_size
);
1061 data_pad
= execp
->a_data
- obj_datasec (abfd
)->size
;
1064 if (!obj_bsssec (abfd
)->user_set_vma
)
1065 obj_bsssec (abfd
)->vma
= (obj_datasec (abfd
)->vma
1066 + obj_datasec (abfd
)->size
);
1067 /* If the BSS immediately follows the data section and extra space
1068 in the page is left after the data section, fudge data
1069 in the header so that the bss section looks smaller by that
1070 amount. We'll start the bss section there, and lie to the OS.
1071 (Note that a linker script, as well as the above assignment,
1072 could have explicitly set the BSS vma to immediately follow
1073 the data section.) */
1074 if (align_power (obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->alignment_power
)
1075 == obj_datasec (abfd
)->vma
+ obj_datasec (abfd
)->size
)
1076 execp
->a_bss
= (data_pad
> obj_bsssec (abfd
)->size
1077 ? 0 : obj_bsssec (abfd
)->size
- data_pad
);
1079 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1083 adjust_n_magic (bfd
*abfd
, struct internal_exec
*execp
)
1085 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1090 obj_textsec (abfd
)->filepos
= pos
;
1091 if (!obj_textsec (abfd
)->user_set_vma
)
1092 obj_textsec (abfd
)->vma
= vma
;
1094 vma
= obj_textsec (abfd
)->vma
;
1095 pos
+= obj_textsec (abfd
)->size
;
1096 vma
+= obj_textsec (abfd
)->size
;
1099 obj_datasec (abfd
)->filepos
= pos
;
1100 if (!obj_datasec (abfd
)->user_set_vma
)
1101 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1102 vma
= obj_datasec (abfd
)->vma
;
1104 /* Since BSS follows data immediately, see if it needs alignment. */
1105 vma
+= obj_datasec (abfd
)->size
;
1106 pad
= align_power (vma
, obj_bsssec (abfd
)->alignment_power
) - vma
;
1107 obj_datasec (abfd
)->size
+= pad
;
1108 pos
+= obj_datasec (abfd
)->size
;
1111 if (!obj_bsssec (abfd
)->user_set_vma
)
1112 obj_bsssec (abfd
)->vma
= vma
;
1114 vma
= obj_bsssec (abfd
)->vma
;
1116 /* Fix up exec header. */
1117 execp
->a_text
= obj_textsec (abfd
)->size
;
1118 execp
->a_data
= obj_datasec (abfd
)->size
;
1119 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1120 N_SET_MAGIC (execp
, NMAGIC
);
1124 NAME (aout
, adjust_sizes_and_vmas
) (bfd
*abfd
)
1126 struct internal_exec
*execp
= exec_hdr (abfd
);
1128 if (! NAME (aout
, make_sections
) (abfd
))
1131 if (adata (abfd
).magic
!= undecided_magic
)
1134 obj_textsec (abfd
)->size
=
1135 align_power (obj_textsec (abfd
)->size
,
1136 obj_textsec (abfd
)->alignment_power
);
1138 /* Rule (heuristic) for when to pad to a new page. Note that there
1139 are (at least) two ways demand-paged (ZMAGIC) files have been
1140 handled. Most Berkeley-based systems start the text segment at
1141 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1142 segment right after the exec header; the latter is counted in the
1143 text segment size, and is paged in by the kernel with the rest of
1146 /* This perhaps isn't the right way to do this, but made it simpler for me
1147 to understand enough to implement it. Better would probably be to go
1148 right from BFD flags to alignment/positioning characteristics. But the
1149 old code was sloppy enough about handling the flags, and had enough
1150 other magic, that it was a little hard for me to understand. I think
1151 I understand it better now, but I haven't time to do the cleanup this
1154 if (abfd
->flags
& D_PAGED
)
1155 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1156 adata (abfd
).magic
= z_magic
;
1157 else if (abfd
->flags
& WP_TEXT
)
1158 adata (abfd
).magic
= n_magic
;
1160 adata (abfd
).magic
= o_magic
;
1162 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1164 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1166 switch (adata (abfd
).magic
)
1168 case n_magic
: str
= "NMAGIC"; break;
1169 case o_magic
: str
= "OMAGIC"; break;
1170 case z_magic
: str
= "ZMAGIC"; break;
1175 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1176 obj_textsec (abfd
)->alignment_power
,
1177 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1178 obj_datasec (abfd
)->alignment_power
,
1179 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
,
1180 obj_bsssec (abfd
)->alignment_power
);
1184 switch (adata (abfd
).magic
)
1187 adjust_o_magic (abfd
, execp
);
1190 adjust_z_magic (abfd
, execp
);
1193 adjust_n_magic (abfd
, execp
);
1199 #ifdef BFD_AOUT_DEBUG
1200 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1201 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1202 obj_textsec (abfd
)->filepos
,
1203 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1204 obj_datasec (abfd
)->filepos
,
1205 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
);
1213 aout_@var{size}_new_section_hook
1216 bfd_boolean aout_@var{size}_new_section_hook,
1221 Called by the BFD in response to a @code{bfd_make_section}
1225 NAME (aout
, new_section_hook
) (bfd
*abfd
, asection
*newsect
)
1227 /* Align to double at least. */
1228 newsect
->alignment_power
= bfd_get_arch_info (abfd
)->section_align_power
;
1230 if (bfd_get_format (abfd
) == bfd_object
)
1232 if (obj_textsec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".text"))
1234 obj_textsec (abfd
)= newsect
;
1235 newsect
->target_index
= N_TEXT
;
1237 else if (obj_datasec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".data"))
1239 obj_datasec (abfd
) = newsect
;
1240 newsect
->target_index
= N_DATA
;
1242 else if (obj_bsssec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".bss"))
1244 obj_bsssec (abfd
) = newsect
;
1245 newsect
->target_index
= N_BSS
;
1249 /* We allow more than three sections internally. */
1250 return _bfd_generic_new_section_hook (abfd
, newsect
);
1254 NAME (aout
, set_section_contents
) (bfd
*abfd
,
1256 const void * location
,
1258 bfd_size_type count
)
1260 if (! abfd
->output_has_begun
)
1262 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
1266 if (section
== obj_bsssec (abfd
))
1268 bfd_set_error (bfd_error_no_contents
);
1272 if (section
!= obj_textsec (abfd
)
1273 && section
!= obj_datasec (abfd
))
1275 if (aout_section_merge_with_text_p (abfd
, section
))
1276 section
->filepos
= obj_textsec (abfd
)->filepos
+
1277 (section
->vma
- obj_textsec (abfd
)->vma
);
1281 (_("%s: can not represent section `%s' in a.out object file format"),
1282 bfd_get_filename (abfd
), bfd_get_section_name (abfd
, section
));
1283 bfd_set_error (bfd_error_nonrepresentable_section
);
1290 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1291 || bfd_bwrite (location
, count
, abfd
) != count
)
1298 /* Read the external symbols from an a.out file. */
1301 aout_get_external_symbols (bfd
*abfd
)
1303 if (obj_aout_external_syms (abfd
) == NULL
)
1305 bfd_size_type count
;
1306 struct external_nlist
*syms
;
1307 bfd_size_type amt
= exec_hdr (abfd
)->a_syms
;
1309 count
= amt
/ EXTERNAL_NLIST_SIZE
;
1311 return TRUE
; /* Nothing to do. */
1314 if (! bfd_get_file_window (abfd
, obj_sym_filepos (abfd
), amt
,
1315 &obj_aout_sym_window (abfd
), TRUE
))
1317 syms
= (struct external_nlist
*) obj_aout_sym_window (abfd
).data
;
1319 /* We allocate using malloc to make the values easy to free
1320 later on. If we put them on the objalloc it might not be
1321 possible to free them. */
1322 syms
= (struct external_nlist
*) bfd_malloc (amt
);
1326 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1327 || bfd_bread (syms
, amt
, abfd
) != amt
)
1334 obj_aout_external_syms (abfd
) = syms
;
1335 obj_aout_external_sym_count (abfd
) = count
;
1338 if (obj_aout_external_strings (abfd
) == NULL
1339 && exec_hdr (abfd
)->a_syms
!= 0)
1341 unsigned char string_chars
[BYTES_IN_WORD
];
1342 bfd_size_type stringsize
;
1344 bfd_size_type amt
= BYTES_IN_WORD
;
1346 /* Get the size of the strings. */
1347 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1348 || bfd_bread ((void *) string_chars
, amt
, abfd
) != amt
)
1350 stringsize
= GET_WORD (abfd
, string_chars
);
1353 if (! bfd_get_file_window (abfd
, obj_str_filepos (abfd
), stringsize
,
1354 &obj_aout_string_window (abfd
), TRUE
))
1356 strings
= (char *) obj_aout_string_window (abfd
).data
;
1358 strings
= (char *) bfd_malloc (stringsize
+ 1);
1359 if (strings
== NULL
)
1362 /* Skip space for the string count in the buffer for convenience
1363 when using indexes. */
1364 amt
= stringsize
- BYTES_IN_WORD
;
1365 if (bfd_bread (strings
+ BYTES_IN_WORD
, amt
, abfd
) != amt
)
1372 /* Ensure that a zero index yields an empty string. */
1375 strings
[stringsize
- 1] = 0;
1377 obj_aout_external_strings (abfd
) = strings
;
1378 obj_aout_external_string_size (abfd
) = stringsize
;
1384 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1385 and symbol->value fields of CACHE_PTR will be set from the a.out
1386 nlist structure. This function is responsible for setting
1387 symbol->flags and symbol->section, and adjusting symbol->value. */
1390 translate_from_native_sym_flags (bfd
*abfd
, aout_symbol_type
*cache_ptr
)
1394 if ((cache_ptr
->type
& N_STAB
) != 0
1395 || cache_ptr
->type
== N_FN
)
1399 /* This is a debugging symbol. */
1400 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1402 /* Work out the symbol section. */
1403 switch (cache_ptr
->type
& N_TYPE
)
1407 sec
= obj_textsec (abfd
);
1410 sec
= obj_datasec (abfd
);
1413 sec
= obj_bsssec (abfd
);
1417 sec
= bfd_abs_section_ptr
;
1421 cache_ptr
->symbol
.section
= sec
;
1422 cache_ptr
->symbol
.value
-= sec
->vma
;
1427 /* Get the default visibility. This does not apply to all types, so
1428 we just hold it in a local variable to use if wanted. */
1429 if ((cache_ptr
->type
& N_EXT
) == 0)
1430 visible
= BSF_LOCAL
;
1432 visible
= BSF_GLOBAL
;
1434 switch (cache_ptr
->type
)
1437 case N_ABS
: case N_ABS
| N_EXT
:
1438 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1439 cache_ptr
->symbol
.flags
= visible
;
1442 case N_UNDF
| N_EXT
:
1443 if (cache_ptr
->symbol
.value
!= 0)
1445 /* This is a common symbol. */
1446 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1447 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1451 cache_ptr
->symbol
.flags
= 0;
1452 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1456 case N_TEXT
: case N_TEXT
| N_EXT
:
1457 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1458 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1459 cache_ptr
->symbol
.flags
= visible
;
1462 /* N_SETV symbols used to represent set vectors placed in the
1463 data section. They are no longer generated. Theoretically,
1464 it was possible to extract the entries and combine them with
1465 new ones, although I don't know if that was ever actually
1466 done. Unless that feature is restored, treat them as data
1468 case N_SETV
: case N_SETV
| N_EXT
:
1469 case N_DATA
: case N_DATA
| N_EXT
:
1470 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1471 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1472 cache_ptr
->symbol
.flags
= visible
;
1475 case N_BSS
: case N_BSS
| N_EXT
:
1476 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1477 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1478 cache_ptr
->symbol
.flags
= visible
;
1481 case N_SETA
: case N_SETA
| N_EXT
:
1482 case N_SETT
: case N_SETT
| N_EXT
:
1483 case N_SETD
: case N_SETD
| N_EXT
:
1484 case N_SETB
: case N_SETB
| N_EXT
:
1486 /* This code is no longer needed. It used to be used to make
1487 the linker handle set symbols, but they are now handled in
1488 the add_symbols routine instead. */
1489 switch (cache_ptr
->type
& N_TYPE
)
1492 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1495 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1498 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1501 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1505 cache_ptr
->symbol
.flags
|= BSF_CONSTRUCTOR
;
1510 /* This symbol is the text of a warning message. The next
1511 symbol is the symbol to associate the warning with. If a
1512 reference is made to that symbol, a warning is issued. */
1513 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_WARNING
;
1514 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1517 case N_INDR
: case N_INDR
| N_EXT
:
1518 /* An indirect symbol. This consists of two symbols in a row.
1519 The first symbol is the name of the indirection. The second
1520 symbol is the name of the target. A reference to the first
1521 symbol becomes a reference to the second. */
1522 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_INDIRECT
| visible
;
1523 cache_ptr
->symbol
.section
= bfd_ind_section_ptr
;
1527 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1528 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1532 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1533 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1537 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1538 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1539 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1543 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1544 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1545 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1549 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1550 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1551 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1558 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1561 translate_to_native_sym_flags (bfd
*abfd
,
1563 struct external_nlist
*sym_pointer
)
1565 bfd_vma value
= cache_ptr
->value
;
1569 /* Mask out any existing type bits in case copying from one section
1571 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1573 sec
= bfd_get_section (cache_ptr
);
1578 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1581 (_("%s: can not represent section for symbol `%s' in a.out "
1582 "object file format"),
1583 bfd_get_filename (abfd
),
1584 cache_ptr
->name
!= NULL
? cache_ptr
->name
: _("*unknown*"));
1585 bfd_set_error (bfd_error_nonrepresentable_section
);
1589 if (sec
->output_section
!= NULL
)
1591 off
= sec
->output_offset
;
1592 sec
= sec
->output_section
;
1595 if (bfd_is_abs_section (sec
))
1596 sym_pointer
->e_type
[0] |= N_ABS
;
1597 else if (sec
== obj_textsec (abfd
))
1598 sym_pointer
->e_type
[0] |= N_TEXT
;
1599 else if (sec
== obj_datasec (abfd
))
1600 sym_pointer
->e_type
[0] |= N_DATA
;
1601 else if (sec
== obj_bsssec (abfd
))
1602 sym_pointer
->e_type
[0] |= N_BSS
;
1603 else if (bfd_is_und_section (sec
))
1604 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1605 else if (bfd_is_ind_section (sec
))
1606 sym_pointer
->e_type
[0] = N_INDR
;
1607 else if (bfd_is_com_section (sec
))
1608 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1611 if (aout_section_merge_with_text_p (abfd
, sec
))
1612 sym_pointer
->e_type
[0] |= N_TEXT
;
1616 (_("%s: can not represent section `%s' in a.out object file format"),
1617 bfd_get_filename (abfd
), bfd_get_section_name (abfd
, sec
));
1618 bfd_set_error (bfd_error_nonrepresentable_section
);
1623 /* Turn the symbol from section relative to absolute again. */
1624 value
+= sec
->vma
+ off
;
1626 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1627 sym_pointer
->e_type
[0] = N_WARNING
;
1629 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1630 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1631 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1632 sym_pointer
->e_type
[0] |= N_EXT
;
1633 else if ((cache_ptr
->flags
& BSF_LOCAL
) != 0)
1634 sym_pointer
->e_type
[0] &= ~N_EXT
;
1636 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1638 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1642 case N_ABS
: type
= N_SETA
; break;
1643 case N_TEXT
: type
= N_SETT
; break;
1644 case N_DATA
: type
= N_SETD
; break;
1645 case N_BSS
: type
= N_SETB
; break;
1647 sym_pointer
->e_type
[0] = type
;
1650 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1654 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1657 case N_ABS
: type
= N_WEAKA
; break;
1658 case N_TEXT
: type
= N_WEAKT
; break;
1659 case N_DATA
: type
= N_WEAKD
; break;
1660 case N_BSS
: type
= N_WEAKB
; break;
1661 case N_UNDF
: type
= N_WEAKU
; break;
1663 sym_pointer
->e_type
[0] = type
;
1666 PUT_WORD (abfd
, value
, sym_pointer
->e_value
);
1671 /* Native-level interface to symbols. */
1674 NAME (aout
, make_empty_symbol
) (bfd
*abfd
)
1676 bfd_size_type amt
= sizeof (aout_symbol_type
);
1678 aout_symbol_type
*new_symbol
= (aout_symbol_type
*) bfd_zalloc (abfd
, amt
);
1681 new_symbol
->symbol
.the_bfd
= abfd
;
1683 return &new_symbol
->symbol
;
1686 /* Translate a set of internal symbols into external symbols. */
1689 NAME (aout
, translate_symbol_table
) (bfd
*abfd
,
1690 aout_symbol_type
*in
,
1691 struct external_nlist
*ext
,
1692 bfd_size_type count
,
1694 bfd_size_type strsize
,
1695 bfd_boolean dynamic
)
1697 struct external_nlist
*ext_end
;
1699 ext_end
= ext
+ count
;
1700 for (; ext
< ext_end
; ext
++, in
++)
1704 x
= GET_WORD (abfd
, ext
->e_strx
);
1705 in
->symbol
.the_bfd
= abfd
;
1707 /* For the normal symbols, the zero index points at the number
1708 of bytes in the string table but is to be interpreted as the
1709 null string. For the dynamic symbols, the number of bytes in
1710 the string table is stored in the __DYNAMIC structure and the
1711 zero index points at an actual string. */
1712 if (x
== 0 && ! dynamic
)
1713 in
->symbol
.name
= "";
1714 else if (x
< strsize
)
1715 in
->symbol
.name
= str
+ x
;
1719 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1720 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1721 in
->other
= H_GET_8 (abfd
, ext
->e_other
);
1722 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1723 in
->symbol
.udata
.p
= NULL
;
1725 if (! translate_from_native_sym_flags (abfd
, in
))
1729 in
->symbol
.flags
|= BSF_DYNAMIC
;
1735 /* We read the symbols into a buffer, which is discarded when this
1736 function exits. We read the strings into a buffer large enough to
1737 hold them all plus all the cached symbol entries. */
1740 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1742 struct external_nlist
*old_external_syms
;
1743 aout_symbol_type
*cached
;
1744 bfd_size_type cached_size
;
1746 /* If there's no work to be done, don't do any. */
1747 if (obj_aout_symbols (abfd
) != NULL
)
1750 old_external_syms
= obj_aout_external_syms (abfd
);
1752 if (! aout_get_external_symbols (abfd
))
1755 cached_size
= obj_aout_external_sym_count (abfd
);
1756 if (cached_size
== 0)
1757 return TRUE
; /* Nothing to do. */
1759 cached_size
*= sizeof (aout_symbol_type
);
1760 cached
= (aout_symbol_type
*) bfd_zmalloc (cached_size
);
1764 /* Convert from external symbol information to internal. */
1765 if (! (NAME (aout
, translate_symbol_table
)
1767 obj_aout_external_syms (abfd
),
1768 obj_aout_external_sym_count (abfd
),
1769 obj_aout_external_strings (abfd
),
1770 obj_aout_external_string_size (abfd
),
1777 bfd_get_symcount (abfd
) = obj_aout_external_sym_count (abfd
);
1779 obj_aout_symbols (abfd
) = cached
;
1781 /* It is very likely that anybody who calls this function will not
1782 want the external symbol information, so if it was allocated
1783 because of our call to aout_get_external_symbols, we free it up
1784 right away to save space. */
1785 if (old_external_syms
== NULL
1786 && obj_aout_external_syms (abfd
) != NULL
)
1789 bfd_free_window (&obj_aout_sym_window (abfd
));
1791 free (obj_aout_external_syms (abfd
));
1793 obj_aout_external_syms (abfd
) = NULL
;
1799 /* We use a hash table when writing out symbols so that we only write
1800 out a particular string once. This helps particularly when the
1801 linker writes out stabs debugging entries, because each different
1802 contributing object file tends to have many duplicate stabs
1805 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1806 if BFD_TRADITIONAL_FORMAT is set. */
1808 /* Get the index of a string in a strtab, adding it if it is not
1811 static inline bfd_size_type
1812 add_to_stringtab (bfd
*abfd
,
1813 struct bfd_strtab_hash
*tab
,
1818 bfd_size_type str_index
;
1820 /* An index of 0 always means the empty string. */
1821 if (str
== 0 || *str
== '\0')
1824 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1825 doesn't understand a hashed string table. */
1827 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1830 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1832 if (str_index
!= (bfd_size_type
) -1)
1833 /* Add BYTES_IN_WORD to the return value to account for the
1834 space taken up by the string table size. */
1835 str_index
+= BYTES_IN_WORD
;
1840 /* Write out a strtab. ABFD is already at the right location in the
1844 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1846 bfd_byte buffer
[BYTES_IN_WORD
];
1847 bfd_size_type amt
= BYTES_IN_WORD
;
1849 /* The string table starts with the size. */
1850 PUT_WORD (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_WORD
, buffer
);
1851 if (bfd_bwrite ((void *) buffer
, amt
, abfd
) != amt
)
1854 return _bfd_stringtab_emit (abfd
, tab
);
1858 NAME (aout
, write_syms
) (bfd
*abfd
)
1860 unsigned int count
;
1861 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1862 struct bfd_strtab_hash
*strtab
;
1864 strtab
= _bfd_stringtab_init ();
1868 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1870 asymbol
*g
= generic
[count
];
1872 struct external_nlist nsp
;
1875 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, FALSE
);
1876 if (indx
== (bfd_size_type
) -1)
1878 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1880 if (bfd_asymbol_flavour (g
) == abfd
->xvec
->flavour
)
1882 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1883 H_PUT_8 (abfd
, aout_symbol (g
)->other
, nsp
.e_other
);
1884 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1888 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1889 H_PUT_8 (abfd
, 0, nsp
.e_other
);
1890 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1893 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1896 amt
= EXTERNAL_NLIST_SIZE
;
1897 if (bfd_bwrite ((void *) &nsp
, amt
, abfd
) != amt
)
1900 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1901 here, at the end. */
1905 if (! emit_stringtab (abfd
, strtab
))
1908 _bfd_stringtab_free (strtab
);
1913 _bfd_stringtab_free (strtab
);
1918 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1920 unsigned int counter
= 0;
1921 aout_symbol_type
*symbase
;
1923 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1926 for (symbase
= obj_aout_symbols (abfd
);
1927 counter
++ < bfd_get_symcount (abfd
);
1929 *(location
++) = (asymbol
*) (symbase
++);
1931 return bfd_get_symcount (abfd
);
1934 /* Standard reloc stuff. */
1935 /* Output standard relocation information to a file in target byte order. */
1937 extern void NAME (aout
, swap_std_reloc_out
)
1938 (bfd
*, arelent
*, struct reloc_std_external
*);
1941 NAME (aout
, swap_std_reloc_out
) (bfd
*abfd
,
1943 struct reloc_std_external
*natptr
)
1946 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1948 unsigned int r_length
;
1950 int r_baserel
, r_jmptable
, r_relative
;
1951 asection
*output_section
= sym
->section
->output_section
;
1953 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
1955 r_length
= g
->howto
->size
; /* Size as a power of two. */
1956 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1957 /* XXX This relies on relocs coming from a.out files. */
1958 r_baserel
= (g
->howto
->type
& 8) != 0;
1959 r_jmptable
= (g
->howto
->type
& 16) != 0;
1960 r_relative
= (g
->howto
->type
& 32) != 0;
1962 /* Name was clobbered by aout_write_syms to be symbol index. */
1964 /* If this relocation is relative to a symbol then set the
1965 r_index to the symbols index, and the r_extern bit.
1967 Absolute symbols can come in in two ways, either as an offset
1968 from the abs section, or as a symbol which has an abs value.
1969 check for that here. */
1971 if (bfd_is_com_section (output_section
)
1972 || bfd_is_abs_section (output_section
)
1973 || bfd_is_und_section (output_section
)
1974 /* PR gas/3041 a.out relocs against weak symbols
1975 must be treated as if they were against externs. */
1976 || (sym
->flags
& BSF_WEAK
))
1978 if (bfd_abs_section_ptr
->symbol
== sym
)
1980 /* Whoops, looked like an abs symbol, but is
1981 really an offset from the abs section. */
1987 /* Fill in symbol. */
1989 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
1994 /* Just an ordinary section. */
1996 r_index
= output_section
->target_index
;
1999 /* Now the fun stuff. */
2000 if (bfd_header_big_endian (abfd
))
2002 natptr
->r_index
[0] = r_index
>> 16;
2003 natptr
->r_index
[1] = r_index
>> 8;
2004 natptr
->r_index
[2] = r_index
;
2005 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2006 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2007 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2008 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2009 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2010 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
2014 natptr
->r_index
[2] = r_index
>> 16;
2015 natptr
->r_index
[1] = r_index
>> 8;
2016 natptr
->r_index
[0] = r_index
;
2017 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2018 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2019 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2020 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2021 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2022 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
2026 /* Extended stuff. */
2027 /* Output extended relocation information to a file in target byte order. */
2029 extern void NAME (aout
, swap_ext_reloc_out
)
2030 (bfd
*, arelent
*, struct reloc_ext_external
*);
2033 NAME (aout
, swap_ext_reloc_out
) (bfd
*abfd
,
2035 struct reloc_ext_external
*natptr
)
2039 unsigned int r_type
;
2041 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2042 asection
*output_section
= sym
->section
->output_section
;
2044 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2046 r_type
= (unsigned int) g
->howto
->type
;
2048 r_addend
= g
->addend
;
2049 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2050 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2052 /* If this relocation is relative to a symbol then set the
2053 r_index to the symbols index, and the r_extern bit.
2055 Absolute symbols can come in in two ways, either as an offset
2056 from the abs section, or as a symbol which has an abs value.
2057 check for that here. */
2058 if (bfd_is_abs_section (bfd_get_section (sym
)))
2063 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2065 if (bfd_is_und_section (bfd_get_section (sym
))
2066 || (sym
->flags
& BSF_GLOBAL
) != 0)
2070 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2074 /* Just an ordinary section. */
2076 r_index
= output_section
->target_index
;
2079 /* Now the fun stuff. */
2080 if (bfd_header_big_endian (abfd
))
2082 natptr
->r_index
[0] = r_index
>> 16;
2083 natptr
->r_index
[1] = r_index
>> 8;
2084 natptr
->r_index
[2] = r_index
;
2085 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2086 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2090 natptr
->r_index
[2] = r_index
>> 16;
2091 natptr
->r_index
[1] = r_index
>> 8;
2092 natptr
->r_index
[0] = r_index
;
2093 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2094 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
));
2097 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2100 /* BFD deals internally with all things based from the section they're
2101 in. so, something in 10 bytes into a text section with a base of
2102 50 would have a symbol (.text+10) and know .text vma was 50.
2104 Aout keeps all it's symbols based from zero, so the symbol would
2105 contain 60. This macro subs the base of each section from the value
2106 to give the true offset from the section. */
2108 #define MOVE_ADDRESS(ad) \
2111 /* Undefined symbol. */ \
2112 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2113 cache_ptr->addend = ad; \
2117 /* Defined, section relative. Replace symbol with pointer to \
2118 symbol which points to section. */ \
2122 case N_TEXT | N_EXT: \
2123 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2124 cache_ptr->addend = ad - su->textsec->vma; \
2127 case N_DATA | N_EXT: \
2128 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2129 cache_ptr->addend = ad - su->datasec->vma; \
2132 case N_BSS | N_EXT: \
2133 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2134 cache_ptr->addend = ad - su->bsssec->vma; \
2138 case N_ABS | N_EXT: \
2139 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2140 cache_ptr->addend = ad; \
2146 NAME (aout
, swap_ext_reloc_in
) (bfd
*abfd
,
2147 struct reloc_ext_external
*bytes
,
2150 bfd_size_type symcount
)
2152 unsigned int r_index
;
2154 unsigned int r_type
;
2155 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2157 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2159 /* Now the fun stuff. */
2160 if (bfd_header_big_endian (abfd
))
2162 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2163 | ((unsigned int) bytes
->r_index
[1] << 8)
2164 | bytes
->r_index
[2]);
2165 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2166 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2167 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
2171 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2172 | ((unsigned int) bytes
->r_index
[1] << 8)
2173 | bytes
->r_index
[0]);
2174 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2175 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2176 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2179 if (r_type
< TABLE_SIZE (howto_table_ext
))
2180 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2182 cache_ptr
->howto
= NULL
;
2184 /* Base relative relocs are always against the symbol table,
2185 regardless of the setting of r_extern. r_extern just reflects
2186 whether the symbol the reloc is against is local or global. */
2187 if (r_type
== (unsigned int) RELOC_BASE10
2188 || r_type
== (unsigned int) RELOC_BASE13
2189 || r_type
== (unsigned int) RELOC_BASE22
)
2192 if (r_extern
&& r_index
> symcount
)
2194 /* We could arrange to return an error, but it might be useful
2195 to see the file even if it is bad. */
2200 MOVE_ADDRESS (GET_SWORD (abfd
, bytes
->r_addend
));
2204 NAME (aout
, swap_std_reloc_in
) (bfd
*abfd
,
2205 struct reloc_std_external
*bytes
,
2208 bfd_size_type symcount
)
2210 unsigned int r_index
;
2212 unsigned int r_length
;
2214 int r_baserel
, r_jmptable
, r_relative
;
2215 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2216 unsigned int howto_idx
;
2218 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
2220 /* Now the fun stuff. */
2221 if (bfd_header_big_endian (abfd
))
2223 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2224 | ((unsigned int) bytes
->r_index
[1] << 8)
2225 | bytes
->r_index
[2]);
2226 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2227 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2228 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2229 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2230 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2231 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2232 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
2236 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2237 | ((unsigned int) bytes
->r_index
[1] << 8)
2238 | bytes
->r_index
[0]);
2239 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2240 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2241 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2242 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2243 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2244 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2245 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2248 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2249 + 16 * r_jmptable
+ 32 * r_relative
);
2250 if (howto_idx
< TABLE_SIZE (howto_table_std
))
2252 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2253 if (cache_ptr
->howto
->type
== (unsigned int) -1)
2254 cache_ptr
->howto
= NULL
;
2257 cache_ptr
->howto
= NULL
;
2259 /* Base relative relocs are always against the symbol table,
2260 regardless of the setting of r_extern. r_extern just reflects
2261 whether the symbol the reloc is against is local or global. */
2265 if (r_extern
&& r_index
> symcount
)
2267 /* We could arrange to return an error, but it might be useful
2268 to see the file even if it is bad. */
2276 /* Read and swap the relocs for a section. */
2279 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
2281 bfd_size_type count
;
2282 bfd_size_type reloc_size
;
2284 arelent
*reloc_cache
;
2286 unsigned int counter
= 0;
2290 if (asect
->relocation
)
2293 if (asect
->flags
& SEC_CONSTRUCTOR
)
2296 if (asect
== obj_datasec (abfd
))
2297 reloc_size
= exec_hdr (abfd
)->a_drsize
;
2298 else if (asect
== obj_textsec (abfd
))
2299 reloc_size
= exec_hdr (abfd
)->a_trsize
;
2300 else if (asect
== obj_bsssec (abfd
))
2304 bfd_set_error (bfd_error_invalid_operation
);
2308 if (reloc_size
== 0)
2309 return TRUE
; /* Nothing to be done. */
2311 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2314 each_size
= obj_reloc_entry_size (abfd
);
2316 count
= reloc_size
/ each_size
;
2318 return TRUE
; /* Nothing to be done. */
2320 amt
= count
* sizeof (arelent
);
2321 reloc_cache
= (arelent
*) bfd_zmalloc (amt
);
2322 if (reloc_cache
== NULL
)
2325 relocs
= bfd_malloc (reloc_size
);
2332 if (bfd_bread (relocs
, reloc_size
, abfd
) != reloc_size
)
2339 cache_ptr
= reloc_cache
;
2340 if (each_size
== RELOC_EXT_SIZE
)
2342 struct reloc_ext_external
*rptr
= (struct reloc_ext_external
*) relocs
;
2344 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2345 MY_swap_ext_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2346 (bfd_size_type
) bfd_get_symcount (abfd
));
2350 struct reloc_std_external
*rptr
= (struct reloc_std_external
*) relocs
;
2352 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2353 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2354 (bfd_size_type
) bfd_get_symcount (abfd
));
2359 asect
->relocation
= reloc_cache
;
2360 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2365 /* Write out a relocation section into an object file. */
2368 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2371 unsigned char *native
, *natptr
;
2374 unsigned int count
= section
->reloc_count
;
2375 bfd_size_type natsize
;
2377 if (count
== 0 || section
->orelocation
== NULL
)
2380 each_size
= obj_reloc_entry_size (abfd
);
2381 natsize
= (bfd_size_type
) each_size
* count
;
2382 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2386 generic
= section
->orelocation
;
2388 if (each_size
== RELOC_EXT_SIZE
)
2390 for (natptr
= native
;
2392 --count
, natptr
+= each_size
, ++generic
)
2393 MY_swap_ext_reloc_out (abfd
, *generic
,
2394 (struct reloc_ext_external
*) natptr
);
2398 for (natptr
= native
;
2400 --count
, natptr
+= each_size
, ++generic
)
2401 MY_swap_std_reloc_out (abfd
, *generic
,
2402 (struct reloc_std_external
*) natptr
);
2405 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2407 bfd_release (abfd
, native
);
2410 bfd_release (abfd
, native
);
2415 /* This is stupid. This function should be a boolean predicate. */
2418 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2423 arelent
*tblptr
= section
->relocation
;
2426 if (section
== obj_bsssec (abfd
))
2432 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
) (abfd
, section
, symbols
)))
2435 if (section
->flags
& SEC_CONSTRUCTOR
)
2437 arelent_chain
*chain
= section
->constructor_chain
;
2438 for (count
= 0; count
< section
->reloc_count
; count
++)
2440 *relptr
++ = &chain
->relent
;
2441 chain
= chain
->next
;
2446 tblptr
= section
->relocation
;
2448 for (count
= 0; count
++ < section
->reloc_count
; )
2450 *relptr
++ = tblptr
++;
2455 return section
->reloc_count
;
2459 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2461 if (bfd_get_format (abfd
) != bfd_object
)
2463 bfd_set_error (bfd_error_invalid_operation
);
2467 if (asect
->flags
& SEC_CONSTRUCTOR
)
2468 return sizeof (arelent
*) * (asect
->reloc_count
+ 1);
2470 if (asect
== obj_datasec (abfd
))
2471 return sizeof (arelent
*)
2472 * ((exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
))
2475 if (asect
== obj_textsec (abfd
))
2476 return sizeof (arelent
*)
2477 * ((exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
))
2480 if (asect
== obj_bsssec (abfd
))
2481 return sizeof (arelent
*);
2483 if (asect
== obj_bsssec (abfd
))
2486 bfd_set_error (bfd_error_invalid_operation
);
2491 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2493 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2496 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2500 NAME (aout
, get_lineno
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2501 asymbol
*ignore_symbol ATTRIBUTE_UNUSED
)
2507 NAME (aout
, get_symbol_info
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2511 bfd_symbol_info (symbol
, ret
);
2513 if (ret
->type
== '?')
2515 int type_code
= aout_symbol (symbol
)->type
& 0xff;
2516 const char *stab_name
= bfd_get_stab_name (type_code
);
2517 static char buf
[10];
2519 if (stab_name
== NULL
)
2521 sprintf (buf
, "(%d)", type_code
);
2525 ret
->stab_type
= type_code
;
2526 ret
->stab_other
= (unsigned) (aout_symbol (symbol
)->other
& 0xff);
2527 ret
->stab_desc
= (unsigned) (aout_symbol (symbol
)->desc
& 0xffff);
2528 ret
->stab_name
= stab_name
;
2533 NAME (aout
, print_symbol
) (bfd
*abfd
,
2536 bfd_print_symbol_type how
)
2538 FILE *file
= (FILE *)afile
;
2542 case bfd_print_symbol_name
:
2544 fprintf (file
,"%s", symbol
->name
);
2546 case bfd_print_symbol_more
:
2547 fprintf (file
,"%4x %2x %2x",
2548 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2549 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2550 (unsigned) (aout_symbol (symbol
)->type
));
2552 case bfd_print_symbol_all
:
2554 const char *section_name
= symbol
->section
->name
;
2556 bfd_print_symbol_vandf (abfd
, (void *)file
, symbol
);
2558 fprintf (file
," %-5s %04x %02x %02x",
2560 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2561 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2562 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2564 fprintf (file
," %s", symbol
->name
);
2570 /* If we don't have to allocate more than 1MB to hold the generic
2571 symbols, we use the generic minisymbol methord: it's faster, since
2572 it only translates the symbols once, not multiple times. */
2573 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2575 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2576 symbols. The minisymbol_to_symbol function translates these into
2577 BFD asymbol structures. */
2580 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2581 bfd_boolean dynamic
,
2583 unsigned int *sizep
)
2586 /* We could handle the dynamic symbols here as well, but it's
2587 easier to hand them off. */
2588 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2590 if (! aout_get_external_symbols (abfd
))
2593 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2594 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2596 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2598 /* By passing the external symbols back from this routine, we are
2599 giving up control over the memory block. Clear
2600 obj_aout_external_syms, so that we do not try to free it
2602 obj_aout_external_syms (abfd
) = NULL
;
2604 *sizep
= EXTERNAL_NLIST_SIZE
;
2605 return obj_aout_external_sym_count (abfd
);
2608 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2609 unmodified a.out symbol. The SYM argument is a structure returned
2610 by bfd_make_empty_symbol, which we fill in here. */
2613 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2614 bfd_boolean dynamic
,
2615 const void * minisym
,
2619 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2620 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2622 memset (sym
, 0, sizeof (aout_symbol_type
));
2624 /* We call translate_symbol_table to translate a single symbol. */
2625 if (! (NAME (aout
, translate_symbol_table
)
2627 (aout_symbol_type
*) sym
,
2628 (struct external_nlist
*) minisym
,
2630 obj_aout_external_strings (abfd
),
2631 obj_aout_external_string_size (abfd
),
2638 /* Provided a BFD, a section and an offset into the section, calculate
2639 and return the name of the source file and the line nearest to the
2643 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2647 const char **filename_ptr
,
2648 const char **functionname_ptr
,
2649 unsigned int *line_ptr
,
2650 unsigned int *disriminator_ptr
)
2652 /* Run down the file looking for the filename, function and linenumber. */
2654 const char *directory_name
= NULL
;
2655 const char *main_file_name
= NULL
;
2656 const char *current_file_name
= NULL
;
2657 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2658 const char *line_directory_name
= NULL
; /* Value of directory_name at line number. */
2659 bfd_vma low_line_vma
= 0;
2660 bfd_vma low_func_vma
= 0;
2662 bfd_size_type filelen
, funclen
;
2665 *filename_ptr
= abfd
->filename
;
2666 *functionname_ptr
= 0;
2668 if (disriminator_ptr
)
2669 *disriminator_ptr
= 0;
2671 if (symbols
!= NULL
)
2673 for (p
= symbols
; *p
; p
++)
2675 aout_symbol_type
*q
= (aout_symbol_type
*) (*p
);
2680 /* If this looks like a file name symbol, and it comes after
2681 the line number we have found so far, but before the
2682 offset, then we have probably not found the right line
2684 if (q
->symbol
.value
<= offset
2685 && ((q
->symbol
.value
> low_line_vma
2686 && (line_file_name
!= NULL
2688 || (q
->symbol
.value
> low_func_vma
2691 const char *symname
;
2693 symname
= q
->symbol
.name
;
2694 if (strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2696 if (q
->symbol
.value
> low_line_vma
)
2699 line_file_name
= NULL
;
2701 if (q
->symbol
.value
> low_func_vma
)
2708 /* If this symbol is less than the offset, but greater than
2709 the line number we have found so far, then we have not
2710 found the right line number. */
2711 if (q
->symbol
.value
<= offset
)
2713 if (q
->symbol
.value
> low_line_vma
)
2716 line_file_name
= NULL
;
2718 if (q
->symbol
.value
> low_func_vma
)
2722 main_file_name
= current_file_name
= q
->symbol
.name
;
2723 /* Look ahead to next symbol to check if that too is an N_SO. */
2727 q
= (aout_symbol_type
*) (*p
);
2728 if (q
->type
!= (int)N_SO
)
2731 /* Found a second N_SO First is directory; second is filename. */
2732 directory_name
= current_file_name
;
2733 main_file_name
= current_file_name
= q
->symbol
.name
;
2734 if (obj_textsec (abfd
) != section
)
2738 current_file_name
= q
->symbol
.name
;
2745 /* We'll keep this if it resolves nearer than the one we have
2747 if (q
->symbol
.value
>= low_line_vma
2748 && q
->symbol
.value
<= offset
)
2750 *line_ptr
= q
->desc
;
2751 low_line_vma
= q
->symbol
.value
;
2752 line_file_name
= current_file_name
;
2753 line_directory_name
= directory_name
;
2758 /* We'll keep this if it is nearer than the one we have already. */
2759 if (q
->symbol
.value
>= low_func_vma
&&
2760 q
->symbol
.value
<= offset
)
2762 low_func_vma
= q
->symbol
.value
;
2763 func
= (asymbol
*)q
;
2765 else if (q
->symbol
.value
> offset
)
2776 main_file_name
= line_file_name
;
2777 directory_name
= line_directory_name
;
2780 if (main_file_name
== NULL
2781 || IS_ABSOLUTE_PATH (main_file_name
)
2782 || directory_name
== NULL
)
2785 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2790 funclen
= strlen (bfd_asymbol_name (func
));
2792 if (adata (abfd
).line_buf
!= NULL
)
2793 free (adata (abfd
).line_buf
);
2795 if (filelen
+ funclen
== 0)
2796 adata (abfd
).line_buf
= buf
= NULL
;
2799 buf
= (char *) bfd_malloc (filelen
+ funclen
+ 3);
2800 adata (abfd
).line_buf
= buf
;
2805 if (main_file_name
!= NULL
)
2807 if (IS_ABSOLUTE_PATH (main_file_name
) || directory_name
== NULL
)
2808 *filename_ptr
= main_file_name
;
2811 sprintf (buf
, "%s%s", directory_name
, main_file_name
);
2812 *filename_ptr
= buf
;
2819 const char *function
= func
->name
;
2822 /* The caller expects a symbol name. We actually have a
2823 function name, without the leading underscore. Put the
2824 underscore back in, so that the caller gets a symbol name. */
2825 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2826 strcpy (buf
, function
);
2829 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2830 strcpy (buf
+ 1, function
);
2832 /* Have to remove : stuff. */
2833 colon
= strchr (buf
, ':');
2836 *functionname_ptr
= buf
;
2843 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2844 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2846 return adata (abfd
).exec_bytes_size
;
2849 /* Free all information we have cached for this BFD. We can always
2850 read it again later if we need it. */
2853 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2857 if (bfd_get_format (abfd
) != bfd_object
2858 || abfd
->tdata
.aout_data
== NULL
)
2861 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2862 BFCI_FREE (obj_aout_symbols (abfd
));
2864 obj_aout_external_syms (abfd
) = 0;
2865 bfd_free_window (&obj_aout_sym_window (abfd
));
2866 bfd_free_window (&obj_aout_string_window (abfd
));
2867 obj_aout_external_strings (abfd
) = 0;
2869 BFCI_FREE (obj_aout_external_syms (abfd
));
2870 BFCI_FREE (obj_aout_external_strings (abfd
));
2872 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2873 BFCI_FREE (o
->relocation
);
2879 /* a.out link code. */
2881 /* Routine to create an entry in an a.out link hash table. */
2883 struct bfd_hash_entry
*
2884 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2885 struct bfd_hash_table
*table
,
2888 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2890 /* Allocate the structure if it has not already been allocated by a
2893 ret
= (struct aout_link_hash_entry
*) bfd_hash_allocate (table
,
2898 /* Call the allocation method of the superclass. */
2899 ret
= ((struct aout_link_hash_entry
*)
2900 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2904 /* Set local fields. */
2905 ret
->written
= FALSE
;
2909 return (struct bfd_hash_entry
*) ret
;
2912 /* Initialize an a.out link hash table. */
2915 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2917 struct bfd_hash_entry
*(*newfunc
)
2918 (struct bfd_hash_entry
*, struct bfd_hash_table
*,
2920 unsigned int entsize
)
2922 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2925 /* Create an a.out link hash table. */
2927 struct bfd_link_hash_table
*
2928 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2930 struct aout_link_hash_table
*ret
;
2931 bfd_size_type amt
= sizeof (* ret
);
2933 ret
= (struct aout_link_hash_table
*) bfd_malloc (amt
);
2937 if (!NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2938 NAME (aout
, link_hash_newfunc
),
2939 sizeof (struct aout_link_hash_entry
)))
2947 /* Add all symbols from an object file to the hash table. */
2950 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2952 bfd_boolean (*add_one_symbol
)
2953 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
2954 bfd_vma
, const char *, bfd_boolean
, bfd_boolean
,
2955 struct bfd_link_hash_entry
**);
2956 struct external_nlist
*syms
;
2957 bfd_size_type sym_count
;
2960 struct aout_link_hash_entry
**sym_hash
;
2961 struct external_nlist
*p
;
2962 struct external_nlist
*pend
;
2965 syms
= obj_aout_external_syms (abfd
);
2966 sym_count
= obj_aout_external_sym_count (abfd
);
2967 strings
= obj_aout_external_strings (abfd
);
2968 if (info
->keep_memory
)
2973 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
2975 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
2976 (abfd
, info
, &syms
, &sym_count
, &strings
)))
2981 return TRUE
; /* Nothing to do. */
2983 /* We keep a list of the linker hash table entries that correspond
2984 to particular symbols. We could just look them up in the hash
2985 table, but keeping the list is more efficient. Perhaps this
2986 should be conditional on info->keep_memory. */
2987 amt
= sym_count
* sizeof (struct aout_link_hash_entry
*);
2988 sym_hash
= (struct aout_link_hash_entry
**) bfd_alloc (abfd
, amt
);
2989 if (sym_hash
== NULL
)
2991 obj_aout_sym_hashes (abfd
) = sym_hash
;
2993 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
2994 if (add_one_symbol
== NULL
)
2995 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
2998 pend
= p
+ sym_count
;
2999 for (; p
< pend
; p
++, sym_hash
++)
3010 type
= H_GET_8 (abfd
, p
->e_type
);
3012 /* Ignore debugging symbols. */
3013 if ((type
& N_STAB
) != 0)
3016 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3017 if (GET_WORD (abfd
, p
->e_strx
) > obj_aout_external_string_size (abfd
))
3019 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3021 value
= GET_WORD (abfd
, p
->e_value
);
3038 /* Ignore symbols that are not externally visible. */
3041 /* Ignore local indirect symbol. */
3046 case N_UNDF
| N_EXT
:
3049 section
= bfd_und_section_ptr
;
3053 section
= bfd_com_section_ptr
;
3056 section
= bfd_abs_section_ptr
;
3058 case N_TEXT
| N_EXT
:
3059 section
= obj_textsec (abfd
);
3060 value
-= bfd_get_section_vma (abfd
, section
);
3062 case N_DATA
| N_EXT
:
3063 case N_SETV
| N_EXT
:
3064 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3065 translate_from_native_sym_flags. */
3066 section
= obj_datasec (abfd
);
3067 value
-= bfd_get_section_vma (abfd
, section
);
3070 section
= obj_bsssec (abfd
);
3071 value
-= bfd_get_section_vma (abfd
, section
);
3073 case N_INDR
| N_EXT
:
3074 /* An indirect symbol. The next symbol is the symbol
3075 which this one really is. */
3076 BFD_ASSERT (p
+ 1 < pend
);
3078 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3079 if (GET_WORD (abfd
, p
->e_strx
) > obj_aout_external_string_size (abfd
))
3081 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3082 section
= bfd_ind_section_ptr
;
3083 flags
|= BSF_INDIRECT
;
3085 case N_COMM
| N_EXT
:
3086 section
= bfd_com_section_ptr
;
3088 case N_SETA
: case N_SETA
| N_EXT
:
3089 section
= bfd_abs_section_ptr
;
3090 flags
|= BSF_CONSTRUCTOR
;
3092 case N_SETT
: case N_SETT
| N_EXT
:
3093 section
= obj_textsec (abfd
);
3094 flags
|= BSF_CONSTRUCTOR
;
3095 value
-= bfd_get_section_vma (abfd
, section
);
3097 case N_SETD
: case N_SETD
| N_EXT
:
3098 section
= obj_datasec (abfd
);
3099 flags
|= BSF_CONSTRUCTOR
;
3100 value
-= bfd_get_section_vma (abfd
, section
);
3102 case N_SETB
: case N_SETB
| N_EXT
:
3103 section
= obj_bsssec (abfd
);
3104 flags
|= BSF_CONSTRUCTOR
;
3105 value
-= bfd_get_section_vma (abfd
, section
);
3108 /* A warning symbol. The next symbol is the one to warn
3109 about. If there is no next symbol, just look away. */
3114 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3115 if (GET_WORD (abfd
, p
->e_strx
) > obj_aout_external_string_size (abfd
))
3117 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3118 section
= bfd_und_section_ptr
;
3119 flags
|= BSF_WARNING
;
3122 section
= bfd_und_section_ptr
;
3126 section
= bfd_abs_section_ptr
;
3130 section
= obj_textsec (abfd
);
3131 value
-= bfd_get_section_vma (abfd
, section
);
3135 section
= obj_datasec (abfd
);
3136 value
-= bfd_get_section_vma (abfd
, section
);
3140 section
= obj_bsssec (abfd
);
3141 value
-= bfd_get_section_vma (abfd
, section
);
3146 if (! ((*add_one_symbol
)
3147 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, FALSE
,
3148 (struct bfd_link_hash_entry
**) sym_hash
)))
3151 /* Restrict the maximum alignment of a common symbol based on
3152 the architecture, since a.out has no way to represent
3153 alignment requirements of a section in a .o file. FIXME:
3154 This isn't quite right: it should use the architecture of the
3155 output file, not the input files. */
3156 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3157 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3158 bfd_get_arch_info (abfd
)->section_align_power
))
3159 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3160 bfd_get_arch_info (abfd
)->section_align_power
;
3162 /* If this is a set symbol, and we are not building sets, then
3163 it is possible for the hash entry to not have been set. In
3164 such a case, treat the symbol as not globally defined. */
3165 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3167 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3171 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3178 /* Free up the internal symbols read from an a.out file. */
3181 aout_link_free_symbols (bfd
*abfd
)
3183 if (obj_aout_external_syms (abfd
) != NULL
)
3186 bfd_free_window (&obj_aout_sym_window (abfd
));
3188 free ((void *) obj_aout_external_syms (abfd
));
3190 obj_aout_external_syms (abfd
) = NULL
;
3192 if (obj_aout_external_strings (abfd
) != NULL
)
3195 bfd_free_window (&obj_aout_string_window (abfd
));
3197 free ((void *) obj_aout_external_strings (abfd
));
3199 obj_aout_external_strings (abfd
) = NULL
;
3204 /* Add symbols from an a.out object file. */
3207 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3209 if (! aout_get_external_symbols (abfd
))
3211 if (! aout_link_add_symbols (abfd
, info
))
3213 if (! info
->keep_memory
)
3215 if (! aout_link_free_symbols (abfd
))
3221 /* Look through the internal symbols to see if this object file should
3222 be included in the link. We should include this object file if it
3223 defines any symbols which are currently undefined. If this object
3224 file defines a common symbol, then we may adjust the size of the
3225 known symbol but we do not include the object file in the link
3226 (unless there is some other reason to include it). */
3229 aout_link_check_ar_symbols (bfd
*abfd
,
3230 struct bfd_link_info
*info
,
3231 bfd_boolean
*pneeded
,
3234 struct external_nlist
*p
;
3235 struct external_nlist
*pend
;
3240 /* Look through all the symbols. */
3241 p
= obj_aout_external_syms (abfd
);
3242 pend
= p
+ obj_aout_external_sym_count (abfd
);
3243 strings
= obj_aout_external_strings (abfd
);
3244 for (; p
< pend
; p
++)
3246 int type
= H_GET_8 (abfd
, p
->e_type
);
3248 struct bfd_link_hash_entry
*h
;
3250 /* Ignore symbols that are not externally visible. This is an
3251 optimization only, as we check the type more thoroughly
3253 if (((type
& N_EXT
) == 0
3254 || (type
& N_STAB
) != 0
3261 if (type
== N_WARNING
3267 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3268 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
3270 /* We are only interested in symbols that are currently
3271 undefined or common. */
3273 || (h
->type
!= bfd_link_hash_undefined
3274 && h
->type
!= bfd_link_hash_common
))
3276 if (type
== (N_INDR
| N_EXT
))
3281 if (type
== (N_TEXT
| N_EXT
)
3282 || type
== (N_DATA
| N_EXT
)
3283 || type
== (N_BSS
| N_EXT
)
3284 || type
== (N_ABS
| N_EXT
)
3285 || type
== (N_INDR
| N_EXT
))
3287 /* This object file defines this symbol. We must link it
3288 in. This is true regardless of whether the current
3289 definition of the symbol is undefined or common.
3291 If the current definition is common, we have a case in
3292 which we have already seen an object file including:
3294 and this object file from the archive includes:
3296 In such a case, whether to include this object is target
3297 dependant for backward compatibility.
3299 FIXME: The SunOS 4.1.3 linker will pull in the archive
3300 element if the symbol is defined in the .data section,
3301 but not if it is defined in the .text section. That
3302 seems a bit crazy to me, and it has not been implemented
3303 yet. However, it might be correct. */
3304 if (h
->type
== bfd_link_hash_common
)
3308 switch (info
->common_skip_ar_symbols
)
3310 case bfd_link_common_skip_text
:
3311 skip
= (type
== (N_TEXT
| N_EXT
));
3313 case bfd_link_common_skip_data
:
3314 skip
= (type
== (N_DATA
| N_EXT
));
3317 case bfd_link_common_skip_all
:
3326 if (!(*info
->callbacks
3327 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3333 if (type
== (N_UNDF
| N_EXT
))
3337 value
= GET_WORD (abfd
, p
->e_value
);
3340 /* This symbol is common in the object from the archive
3342 if (h
->type
== bfd_link_hash_undefined
)
3347 symbfd
= h
->u
.undef
.abfd
;
3350 /* This symbol was created as undefined from
3351 outside BFD. We assume that we should link
3352 in the object file. This is done for the -u
3353 option in the linker. */
3354 if (!(*info
->callbacks
3355 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3360 /* Turn the current link symbol into a common
3361 symbol. It is already on the undefs list. */
3362 h
->type
= bfd_link_hash_common
;
3363 h
->u
.c
.p
= (struct bfd_link_hash_common_entry
*)
3364 bfd_hash_allocate (&info
->hash
->table
,
3365 sizeof (struct bfd_link_hash_common_entry
));
3366 if (h
->u
.c
.p
== NULL
)
3369 h
->u
.c
.size
= value
;
3371 /* FIXME: This isn't quite right. The maximum
3372 alignment of a common symbol should be set by the
3373 architecture of the output file, not of the input
3375 power
= bfd_log2 (value
);
3376 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3377 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3378 h
->u
.c
.p
->alignment_power
= power
;
3380 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3385 /* Adjust the size of the common symbol if
3387 if (value
> h
->u
.c
.size
)
3388 h
->u
.c
.size
= value
;
3398 /* This symbol is weak but defined. We must pull it in if
3399 the current link symbol is undefined, but we don't want
3400 it if the current link symbol is common. */
3401 if (h
->type
== bfd_link_hash_undefined
)
3403 if (!(*info
->callbacks
3404 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3412 /* We do not need this object file. */
3415 /* Check a single archive element to see if we need to include it in
3416 the link. *PNEEDED is set according to whether this element is
3417 needed in the link or not. This is called from
3418 _bfd_generic_link_add_archive_symbols. */
3421 aout_link_check_archive_element (bfd
*abfd
,
3422 struct bfd_link_info
*info
,
3423 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3424 const char *name ATTRIBUTE_UNUSED
,
3425 bfd_boolean
*pneeded
)
3430 if (!aout_get_external_symbols (abfd
))
3434 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
3440 /* Potentially, the add_archive_element hook may have set a
3441 substitute BFD for us. */
3444 if (!info
->keep_memory
3445 && !aout_link_free_symbols (oldbfd
))
3447 if (!aout_get_external_symbols (abfd
))
3450 if (!aout_link_add_symbols (abfd
, info
))
3454 if (!info
->keep_memory
|| !needed
)
3456 if (!aout_link_free_symbols (abfd
))
3463 /* Given an a.out BFD, add symbols to the global hash table as
3467 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
3469 switch (bfd_get_format (abfd
))
3472 return aout_link_add_object_symbols (abfd
, info
);
3474 return _bfd_generic_link_add_archive_symbols
3475 (abfd
, info
, aout_link_check_archive_element
);
3477 bfd_set_error (bfd_error_wrong_format
);
3482 /* A hash table used for header files with N_BINCL entries. */
3484 struct aout_link_includes_table
3486 struct bfd_hash_table root
;
3489 /* A linked list of totals that we have found for a particular header
3492 struct aout_link_includes_totals
3494 struct aout_link_includes_totals
*next
;
3498 /* An entry in the header file hash table. */
3500 struct aout_link_includes_entry
3502 struct bfd_hash_entry root
;
3503 /* List of totals we have found for this file. */
3504 struct aout_link_includes_totals
*totals
;
3507 /* Look up an entry in an the header file hash table. */
3509 #define aout_link_includes_lookup(table, string, create, copy) \
3510 ((struct aout_link_includes_entry *) \
3511 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3513 /* During the final link step we need to pass around a bunch of
3514 information, so we do it in an instance of this structure. */
3516 struct aout_final_link_info
3518 /* General link information. */
3519 struct bfd_link_info
*info
;
3522 /* Reloc file positions. */
3523 file_ptr treloff
, dreloff
;
3524 /* File position of symbols. */
3527 struct bfd_strtab_hash
*strtab
;
3528 /* Header file hash table. */
3529 struct aout_link_includes_table includes
;
3530 /* A buffer large enough to hold the contents of any section. */
3532 /* A buffer large enough to hold the relocs of any section. */
3534 /* A buffer large enough to hold the symbol map of any input BFD. */
3536 /* A buffer large enough to hold output symbols of any input BFD. */
3537 struct external_nlist
*output_syms
;
3540 /* The function to create a new entry in the header file hash table. */
3542 static struct bfd_hash_entry
*
3543 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3544 struct bfd_hash_table
*table
,
3547 struct aout_link_includes_entry
*ret
=
3548 (struct aout_link_includes_entry
*) entry
;
3550 /* Allocate the structure if it has not already been allocated by a
3553 ret
= (struct aout_link_includes_entry
*)
3554 bfd_hash_allocate (table
, sizeof (* ret
));
3558 /* Call the allocation method of the superclass. */
3559 ret
= ((struct aout_link_includes_entry
*)
3560 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3563 /* Set local fields. */
3567 return (struct bfd_hash_entry
*) ret
;
3570 /* Write out a symbol that was not associated with an a.out input
3574 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3576 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3577 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3581 struct external_nlist outsym
;
3585 if (h
->root
.type
== bfd_link_hash_warning
)
3587 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3588 if (h
->root
.type
== bfd_link_hash_new
)
3592 output_bfd
= flaginfo
->output_bfd
;
3594 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3596 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3597 (output_bfd
, flaginfo
->info
, h
)))
3599 /* FIXME: No way to handle errors. */
3609 /* An indx of -2 means the symbol must be written. */
3611 && (flaginfo
->info
->strip
== strip_all
3612 || (flaginfo
->info
->strip
== strip_some
3613 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3614 FALSE
, FALSE
) == NULL
)))
3617 switch (h
->root
.type
)
3620 case bfd_link_hash_warning
:
3622 /* Avoid variable not initialized warnings. */
3624 case bfd_link_hash_new
:
3625 /* This can happen for set symbols when sets are not being
3628 case bfd_link_hash_undefined
:
3629 type
= N_UNDF
| N_EXT
;
3632 case bfd_link_hash_defined
:
3633 case bfd_link_hash_defweak
:
3637 sec
= h
->root
.u
.def
.section
->output_section
;
3638 BFD_ASSERT (bfd_is_abs_section (sec
)
3639 || sec
->owner
== output_bfd
);
3640 if (sec
== obj_textsec (output_bfd
))
3641 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3642 else if (sec
== obj_datasec (output_bfd
))
3643 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3644 else if (sec
== obj_bsssec (output_bfd
))
3645 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3647 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3649 val
= (h
->root
.u
.def
.value
3651 + h
->root
.u
.def
.section
->output_offset
);
3654 case bfd_link_hash_common
:
3655 type
= N_UNDF
| N_EXT
;
3656 val
= h
->root
.u
.c
.size
;
3658 case bfd_link_hash_undefweak
:
3662 case bfd_link_hash_indirect
:
3663 /* We ignore these symbols, since the indirected symbol is
3664 already in the hash table. */
3668 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3669 H_PUT_8 (output_bfd
, 0, outsym
.e_other
);
3670 H_PUT_16 (output_bfd
, 0, outsym
.e_desc
);
3671 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3673 if (indx
== - (bfd_size_type
) 1)
3674 /* FIXME: No way to handle errors. */
3677 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3678 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3680 amt
= EXTERNAL_NLIST_SIZE
;
3681 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3682 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3683 /* FIXME: No way to handle errors. */
3686 flaginfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
3687 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3688 ++obj_aout_external_sym_count (output_bfd
);
3693 /* Handle a link order which is supposed to generate a reloc. */
3696 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3698 struct bfd_link_order
*p
)
3700 struct bfd_link_order_reloc
*pr
;
3703 reloc_howto_type
*howto
;
3704 file_ptr
*reloff_ptr
= NULL
;
3705 struct reloc_std_external srel
;
3706 struct reloc_ext_external erel
;
3712 if (p
->type
== bfd_section_reloc_link_order
)
3715 if (bfd_is_abs_section (pr
->u
.section
))
3716 r_index
= N_ABS
| N_EXT
;
3719 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3720 r_index
= pr
->u
.section
->target_index
;
3725 struct aout_link_hash_entry
*h
;
3727 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3729 h
= ((struct aout_link_hash_entry
*)
3730 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3731 pr
->u
.name
, FALSE
, FALSE
, TRUE
));
3737 /* We decided to strip this symbol, but it turns out that we
3738 can't. Note that we lose the other and desc information
3739 here. I don't think that will ever matter for a global
3743 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3749 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3750 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3755 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3758 bfd_set_error (bfd_error_bad_value
);
3762 if (o
== obj_textsec (flaginfo
->output_bfd
))
3763 reloff_ptr
= &flaginfo
->treloff
;
3764 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3765 reloff_ptr
= &flaginfo
->dreloff
;
3769 if (obj_reloc_entry_size (flaginfo
->output_bfd
) == RELOC_STD_SIZE
)
3772 MY_put_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3782 r_pcrel
= (int) howto
->pc_relative
;
3783 r_baserel
= (howto
->type
& 8) != 0;
3784 r_jmptable
= (howto
->type
& 16) != 0;
3785 r_relative
= (howto
->type
& 32) != 0;
3786 r_length
= howto
->size
;
3788 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3789 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3791 srel
.r_index
[0] = r_index
>> 16;
3792 srel
.r_index
[1] = r_index
>> 8;
3793 srel
.r_index
[2] = r_index
;
3795 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3796 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3797 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3798 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3799 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3800 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3804 srel
.r_index
[2] = r_index
>> 16;
3805 srel
.r_index
[1] = r_index
>> 8;
3806 srel
.r_index
[0] = r_index
;
3808 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3809 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3810 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3811 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3812 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3813 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3817 rel_ptr
= (void *) &srel
;
3819 /* We have to write the addend into the object file, since
3820 standard a.out relocs are in place. It would be more
3821 reliable if we had the current contents of the file here,
3822 rather than assuming zeroes, but we can't read the file since
3823 it was opened using bfd_openw. */
3824 if (pr
->addend
!= 0)
3827 bfd_reloc_status_type r
;
3831 size
= bfd_get_reloc_size (howto
);
3832 buf
= (bfd_byte
*) bfd_zmalloc (size
);
3833 if (buf
== NULL
&& size
!= 0)
3835 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3836 (bfd_vma
) pr
->addend
, buf
);
3842 case bfd_reloc_outofrange
:
3844 case bfd_reloc_overflow
:
3845 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3846 (flaginfo
->info
, NULL
,
3847 (p
->type
== bfd_section_reloc_link_order
3848 ? bfd_section_name (flaginfo
->output_bfd
,
3851 howto
->name
, pr
->addend
, NULL
, NULL
, (bfd_vma
) 0);
3854 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
, (void *) buf
,
3855 (file_ptr
) p
->offset
, size
);
3863 #ifdef MY_put_ext_reloc
3864 MY_put_ext_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
,
3865 howto
, &erel
, pr
->addend
);
3867 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, erel
.r_address
);
3869 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3871 erel
.r_index
[0] = r_index
>> 16;
3872 erel
.r_index
[1] = r_index
>> 8;
3873 erel
.r_index
[2] = r_index
;
3875 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
3876 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
3880 erel
.r_index
[2] = r_index
>> 16;
3881 erel
.r_index
[1] = r_index
>> 8;
3882 erel
.r_index
[0] = r_index
;
3884 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
3885 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
3888 PUT_WORD (flaginfo
->output_bfd
, (bfd_vma
) pr
->addend
, erel
.r_addend
);
3889 #endif /* MY_put_ext_reloc */
3891 rel_ptr
= (void *) &erel
;
3894 amt
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3895 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3896 || bfd_bwrite (rel_ptr
, amt
, flaginfo
->output_bfd
) != amt
)
3899 *reloff_ptr
+= obj_reloc_entry_size (flaginfo
->output_bfd
);
3901 /* Assert that the relocs have not run into the symbols, and that n
3902 the text relocs have not run into the data relocs. */
3903 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3904 && (reloff_ptr
!= &flaginfo
->treloff
3906 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3911 /* Get the section corresponding to a reloc index. */
3913 static INLINE asection
*
3914 aout_reloc_index_to_section (bfd
*abfd
, int indx
)
3916 switch (indx
& N_TYPE
)
3918 case N_TEXT
: return obj_textsec (abfd
);
3919 case N_DATA
: return obj_datasec (abfd
);
3920 case N_BSS
: return obj_bsssec (abfd
);
3922 case N_UNDF
: return bfd_abs_section_ptr
;
3928 /* Relocate an a.out section using standard a.out relocs. */
3931 aout_link_input_section_std (struct aout_final_link_info
*flaginfo
,
3933 asection
*input_section
,
3934 struct reloc_std_external
*relocs
,
3935 bfd_size_type rel_size
,
3938 bfd_boolean (*check_dynamic_reloc
)
3939 (struct bfd_link_info
*, bfd
*, asection
*,
3940 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
3943 bfd_boolean relocatable
;
3944 struct external_nlist
*syms
;
3946 struct aout_link_hash_entry
**sym_hashes
;
3948 bfd_size_type reloc_count
;
3949 struct reloc_std_external
*rel
;
3950 struct reloc_std_external
*rel_end
;
3952 output_bfd
= flaginfo
->output_bfd
;
3953 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
3955 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
3956 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
3957 == output_bfd
->xvec
->header_byteorder
);
3959 relocatable
= bfd_link_relocatable (flaginfo
->info
);
3960 syms
= obj_aout_external_syms (input_bfd
);
3961 strings
= obj_aout_external_strings (input_bfd
);
3962 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
3963 symbol_map
= flaginfo
->symbol_map
;
3965 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
3967 rel_end
= rel
+ reloc_count
;
3968 for (; rel
< rel_end
; rel
++)
3975 reloc_howto_type
*howto
;
3976 struct aout_link_hash_entry
*h
= NULL
;
3978 bfd_reloc_status_type r
;
3980 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
3982 #ifdef MY_reloc_howto
3983 howto
= MY_reloc_howto (input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
3989 unsigned int howto_idx
;
3991 if (bfd_header_big_endian (input_bfd
))
3993 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
3994 | ((unsigned int) rel
->r_index
[1] << 8)
3996 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
3997 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
3998 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
3999 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4000 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4001 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4002 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4006 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4007 | ((unsigned int) rel
->r_index
[1] << 8)
4009 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4010 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4011 r_baserel
= (0 != (rel
->r_type
[0]
4012 & RELOC_STD_BITS_BASEREL_LITTLE
));
4013 r_jmptable
= (0 != (rel
->r_type
[0]
4014 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4015 r_relative
= (0 != (rel
->r_type
[0]
4016 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4017 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4018 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4021 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4022 + 16 * r_jmptable
+ 32 * r_relative
);
4023 if (howto_idx
< TABLE_SIZE (howto_table_std
))
4024 howto
= howto_table_std
+ howto_idx
;
4032 (*flaginfo
->info
->callbacks
->einfo
)
4033 (_("%P: %B: unexpected relocation type\n"), input_bfd
);
4034 bfd_set_error (bfd_error_bad_value
);
4040 /* We are generating a relocatable output file, and must
4041 modify the reloc accordingly. */
4044 /* If we know the symbol this relocation is against,
4045 convert it into a relocation against a section. This
4046 is what the native linker does. */
4047 h
= sym_hashes
[r_index
];
4049 && (h
->root
.type
== bfd_link_hash_defined
4050 || h
->root
.type
== bfd_link_hash_defweak
))
4052 asection
*output_section
;
4054 /* Change the r_extern value. */
4055 if (bfd_header_big_endian (output_bfd
))
4056 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4058 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4060 /* Compute a new r_index. */
4061 output_section
= h
->root
.u
.def
.section
->output_section
;
4062 if (output_section
== obj_textsec (output_bfd
))
4064 else if (output_section
== obj_datasec (output_bfd
))
4066 else if (output_section
== obj_bsssec (output_bfd
))
4071 /* Add the symbol value and the section VMA to the
4072 addend stored in the contents. */
4073 relocation
= (h
->root
.u
.def
.value
4074 + output_section
->vma
4075 + h
->root
.u
.def
.section
->output_offset
);
4079 /* We must change r_index according to the symbol
4081 r_index
= symbol_map
[r_index
];
4087 /* We decided to strip this symbol, but it
4088 turns out that we can't. Note that we
4089 lose the other and desc information here.
4090 I don't think that will ever matter for a
4096 if (!aout_link_write_other_symbol (&h
->root
.root
,
4106 name
= strings
+ GET_WORD (input_bfd
,
4107 syms
[r_index
].e_strx
);
4108 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4109 (flaginfo
->info
, name
,
4110 input_bfd
, input_section
, r_addr
);
4118 /* Write out the new r_index value. */
4119 if (bfd_header_big_endian (output_bfd
))
4121 rel
->r_index
[0] = r_index
>> 16;
4122 rel
->r_index
[1] = r_index
>> 8;
4123 rel
->r_index
[2] = r_index
;
4127 rel
->r_index
[2] = r_index
>> 16;
4128 rel
->r_index
[1] = r_index
>> 8;
4129 rel
->r_index
[0] = r_index
;
4136 /* This is a relocation against a section. We must
4137 adjust by the amount that the section moved. */
4138 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4139 relocation
= (section
->output_section
->vma
4140 + section
->output_offset
4144 /* Change the address of the relocation. */
4145 PUT_WORD (output_bfd
,
4146 r_addr
+ input_section
->output_offset
,
4149 /* Adjust a PC relative relocation by removing the reference
4150 to the original address in the section and including the
4151 reference to the new address. */
4153 relocation
-= (input_section
->output_section
->vma
4154 + input_section
->output_offset
4155 - input_section
->vma
);
4157 #ifdef MY_relocatable_reloc
4158 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4161 if (relocation
== 0)
4164 r
= MY_relocate_contents (howto
,
4165 input_bfd
, relocation
,
4172 /* We are generating an executable, and must do a full
4178 h
= sym_hashes
[r_index
];
4181 && (h
->root
.type
== bfd_link_hash_defined
4182 || h
->root
.type
== bfd_link_hash_defweak
))
4184 relocation
= (h
->root
.u
.def
.value
4185 + h
->root
.u
.def
.section
->output_section
->vma
4186 + h
->root
.u
.def
.section
->output_offset
);
4189 && h
->root
.type
== bfd_link_hash_undefweak
)
4201 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4202 relocation
= (section
->output_section
->vma
4203 + section
->output_offset
4206 relocation
+= input_section
->vma
;
4209 if (check_dynamic_reloc
!= NULL
)
4213 if (! ((*check_dynamic_reloc
)
4214 (flaginfo
->info
, input_bfd
, input_section
, h
,
4215 (void *) rel
, contents
, &skip
, &relocation
)))
4221 /* Now warn if a global symbol is undefined. We could not
4222 do this earlier, because check_dynamic_reloc might want
4223 to skip this reloc. */
4224 if (hundef
&& ! bfd_link_pic (flaginfo
->info
) && ! r_baserel
)
4229 name
= h
->root
.root
.string
;
4231 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4232 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4233 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4236 r
= MY_final_link_relocate (howto
,
4237 input_bfd
, input_section
,
4238 contents
, r_addr
, relocation
,
4242 if (r
!= bfd_reloc_ok
)
4247 case bfd_reloc_outofrange
:
4249 case bfd_reloc_overflow
:
4256 name
= strings
+ GET_WORD (input_bfd
,
4257 syms
[r_index
].e_strx
);
4262 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4263 name
= bfd_section_name (input_bfd
, s
);
4265 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4266 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4267 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
4277 /* Relocate an a.out section using extended a.out relocs. */
4280 aout_link_input_section_ext (struct aout_final_link_info
*flaginfo
,
4282 asection
*input_section
,
4283 struct reloc_ext_external
*relocs
,
4284 bfd_size_type rel_size
,
4287 bfd_boolean (*check_dynamic_reloc
)
4288 (struct bfd_link_info
*, bfd
*, asection
*,
4289 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4292 bfd_boolean relocatable
;
4293 struct external_nlist
*syms
;
4295 struct aout_link_hash_entry
**sym_hashes
;
4297 bfd_size_type reloc_count
;
4298 struct reloc_ext_external
*rel
;
4299 struct reloc_ext_external
*rel_end
;
4301 output_bfd
= flaginfo
->output_bfd
;
4302 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4304 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4305 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4306 == output_bfd
->xvec
->header_byteorder
);
4308 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4309 syms
= obj_aout_external_syms (input_bfd
);
4310 strings
= obj_aout_external_strings (input_bfd
);
4311 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4312 symbol_map
= flaginfo
->symbol_map
;
4314 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4316 rel_end
= rel
+ reloc_count
;
4317 for (; rel
< rel_end
; rel
++)
4322 unsigned int r_type
;
4324 struct aout_link_hash_entry
*h
= NULL
;
4325 asection
*r_section
= NULL
;
4328 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4330 if (bfd_header_big_endian (input_bfd
))
4332 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4333 | ((unsigned int) rel
->r_index
[1] << 8)
4335 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4336 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4337 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4341 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4342 | ((unsigned int) rel
->r_index
[1] << 8)
4344 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4345 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4346 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4349 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4351 if (r_type
>= TABLE_SIZE (howto_table_ext
))
4353 (*flaginfo
->info
->callbacks
->einfo
)
4354 (_("%P: %B: unexpected relocation type\n"), input_bfd
);
4355 bfd_set_error (bfd_error_bad_value
);
4361 /* We are generating a relocatable output file, and must
4362 modify the reloc accordingly. */
4364 || r_type
== (unsigned int) RELOC_BASE10
4365 || r_type
== (unsigned int) RELOC_BASE13
4366 || r_type
== (unsigned int) RELOC_BASE22
)
4368 /* If we know the symbol this relocation is against,
4369 convert it into a relocation against a section. This
4370 is what the native linker does. */
4371 if (r_type
== (unsigned int) RELOC_BASE10
4372 || r_type
== (unsigned int) RELOC_BASE13
4373 || r_type
== (unsigned int) RELOC_BASE22
)
4376 h
= sym_hashes
[r_index
];
4378 && (h
->root
.type
== bfd_link_hash_defined
4379 || h
->root
.type
== bfd_link_hash_defweak
))
4381 asection
*output_section
;
4383 /* Change the r_extern value. */
4384 if (bfd_header_big_endian (output_bfd
))
4385 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4387 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4389 /* Compute a new r_index. */
4390 output_section
= h
->root
.u
.def
.section
->output_section
;
4391 if (output_section
== obj_textsec (output_bfd
))
4393 else if (output_section
== obj_datasec (output_bfd
))
4395 else if (output_section
== obj_bsssec (output_bfd
))
4400 /* Add the symbol value and the section VMA to the
4402 relocation
= (h
->root
.u
.def
.value
4403 + output_section
->vma
4404 + h
->root
.u
.def
.section
->output_offset
);
4406 /* Now RELOCATION is the VMA of the final
4407 destination. If this is a PC relative reloc,
4408 then ADDEND is the negative of the source VMA.
4409 We want to set ADDEND to the difference between
4410 the destination VMA and the source VMA, which
4411 means we must adjust RELOCATION by the change in
4412 the source VMA. This is done below. */
4416 /* We must change r_index according to the symbol
4418 r_index
= symbol_map
[r_index
];
4424 /* We decided to strip this symbol, but it
4425 turns out that we can't. Note that we
4426 lose the other and desc information here.
4427 I don't think that will ever matter for a
4433 if (!aout_link_write_other_symbol (&h
->root
.root
,
4443 name
= strings
+ GET_WORD (input_bfd
,
4444 syms
[r_index
].e_strx
);
4445 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4446 (flaginfo
->info
, name
,
4447 input_bfd
, input_section
, r_addr
);
4454 /* If this is a PC relative reloc, then the addend
4455 is the negative of the source VMA. We must
4456 adjust it by the change in the source VMA. This
4460 /* Write out the new r_index value. */
4461 if (bfd_header_big_endian (output_bfd
))
4463 rel
->r_index
[0] = r_index
>> 16;
4464 rel
->r_index
[1] = r_index
>> 8;
4465 rel
->r_index
[2] = r_index
;
4469 rel
->r_index
[2] = r_index
>> 16;
4470 rel
->r_index
[1] = r_index
>> 8;
4471 rel
->r_index
[0] = r_index
;
4476 /* This is a relocation against a section. We must
4477 adjust by the amount that the section moved. */
4478 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4479 relocation
= (r_section
->output_section
->vma
4480 + r_section
->output_offset
4483 /* If this is a PC relative reloc, then the addend is
4484 the difference in VMA between the destination and the
4485 source. We have just adjusted for the change in VMA
4486 of the destination, so we must also adjust by the
4487 change in VMA of the source. This is done below. */
4490 /* As described above, we must always adjust a PC relative
4491 reloc by the change in VMA of the source. However, if
4492 pcrel_offset is set, then the addend does not include the
4493 location within the section, in which case we don't need
4494 to adjust anything. */
4495 if (howto_table_ext
[r_type
].pc_relative
4496 && ! howto_table_ext
[r_type
].pcrel_offset
)
4497 relocation
-= (input_section
->output_section
->vma
4498 + input_section
->output_offset
4499 - input_section
->vma
);
4501 /* Change the addend if necessary. */
4502 if (relocation
!= 0)
4503 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4505 /* Change the address of the relocation. */
4506 PUT_WORD (output_bfd
,
4507 r_addr
+ input_section
->output_offset
,
4513 bfd_reloc_status_type r
;
4515 /* We are generating an executable, and must do a full
4521 h
= sym_hashes
[r_index
];
4524 && (h
->root
.type
== bfd_link_hash_defined
4525 || h
->root
.type
== bfd_link_hash_defweak
))
4527 relocation
= (h
->root
.u
.def
.value
4528 + h
->root
.u
.def
.section
->output_section
->vma
4529 + h
->root
.u
.def
.section
->output_offset
);
4532 && h
->root
.type
== bfd_link_hash_undefweak
)
4540 else if (r_type
== (unsigned int) RELOC_BASE10
4541 || r_type
== (unsigned int) RELOC_BASE13
4542 || r_type
== (unsigned int) RELOC_BASE22
)
4544 struct external_nlist
*sym
;
4547 /* For base relative relocs, r_index is always an index
4548 into the symbol table, even if r_extern is 0. */
4549 sym
= syms
+ r_index
;
4550 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4551 if ((type
& N_TYPE
) == N_TEXT
4553 r_section
= obj_textsec (input_bfd
);
4554 else if ((type
& N_TYPE
) == N_DATA
4556 r_section
= obj_datasec (input_bfd
);
4557 else if ((type
& N_TYPE
) == N_BSS
4559 r_section
= obj_bsssec (input_bfd
);
4560 else if ((type
& N_TYPE
) == N_ABS
4562 r_section
= bfd_abs_section_ptr
;
4565 relocation
= (r_section
->output_section
->vma
4566 + r_section
->output_offset
4567 + (GET_WORD (input_bfd
, sym
->e_value
)
4572 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4574 /* If this is a PC relative reloc, then R_ADDEND is the
4575 difference between the two vmas, or
4576 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4578 old_dest_sec == section->vma
4580 old_src_sec == input_section->vma
4582 old_src_off == r_addr
4584 _bfd_final_link_relocate expects RELOCATION +
4585 R_ADDEND to be the VMA of the destination minus
4586 r_addr (the minus r_addr is because this relocation
4587 is not pcrel_offset, which is a bit confusing and
4588 should, perhaps, be changed), or
4591 new_dest_sec == output_section->vma + output_offset
4592 We arrange for this to happen by setting RELOCATION to
4593 new_dest_sec + old_src_sec - old_dest_sec
4595 If this is not a PC relative reloc, then R_ADDEND is
4596 simply the VMA of the destination, so we set
4597 RELOCATION to the change in the destination VMA, or
4598 new_dest_sec - old_dest_sec
4600 relocation
= (r_section
->output_section
->vma
4601 + r_section
->output_offset
4603 if (howto_table_ext
[r_type
].pc_relative
)
4604 relocation
+= input_section
->vma
;
4607 if (check_dynamic_reloc
!= NULL
)
4611 if (! ((*check_dynamic_reloc
)
4612 (flaginfo
->info
, input_bfd
, input_section
, h
,
4613 (void *) rel
, contents
, &skip
, &relocation
)))
4619 /* Now warn if a global symbol is undefined. We could not
4620 do this earlier, because check_dynamic_reloc might want
4621 to skip this reloc. */
4623 && ! bfd_link_pic (flaginfo
->info
)
4624 && r_type
!= (unsigned int) RELOC_BASE10
4625 && r_type
!= (unsigned int) RELOC_BASE13
4626 && r_type
!= (unsigned int) RELOC_BASE22
)
4631 name
= h
->root
.root
.string
;
4633 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4634 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4635 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4638 if (r_type
!= (unsigned int) RELOC_SPARC_REV32
)
4639 r
= MY_final_link_relocate (howto_table_ext
+ r_type
,
4640 input_bfd
, input_section
,
4641 contents
, r_addr
, relocation
,
4647 x
= bfd_get_32 (input_bfd
, contents
+ r_addr
);
4648 x
= x
+ relocation
+ r_addend
;
4649 bfd_putl32 (/*input_bfd,*/ x
, contents
+ r_addr
);
4653 if (r
!= bfd_reloc_ok
)
4658 case bfd_reloc_outofrange
:
4660 case bfd_reloc_overflow
:
4667 || r_type
== (unsigned int) RELOC_BASE10
4668 || r_type
== (unsigned int) RELOC_BASE13
4669 || r_type
== (unsigned int) RELOC_BASE22
)
4670 name
= strings
+ GET_WORD (input_bfd
,
4671 syms
[r_index
].e_strx
);
4676 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4677 name
= bfd_section_name (input_bfd
, s
);
4679 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4680 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
,
4681 howto_table_ext
[r_type
].name
,
4682 r_addend
, input_bfd
, input_section
, r_addr
);
4693 /* Link an a.out section into the output file. */
4696 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
4698 asection
*input_section
,
4699 file_ptr
*reloff_ptr
,
4700 bfd_size_type rel_size
)
4702 bfd_size_type input_size
;
4705 /* Get the section contents. */
4706 input_size
= input_section
->size
;
4707 if (! bfd_get_section_contents (input_bfd
, input_section
,
4708 (void *) flaginfo
->contents
,
4709 (file_ptr
) 0, input_size
))
4712 /* Read in the relocs if we haven't already done it. */
4713 if (aout_section_data (input_section
) != NULL
4714 && aout_section_data (input_section
)->relocs
!= NULL
)
4715 relocs
= aout_section_data (input_section
)->relocs
;
4718 relocs
= flaginfo
->relocs
;
4721 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4722 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
4727 /* Relocate the section contents. */
4728 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4730 if (! aout_link_input_section_std (flaginfo
, input_bfd
, input_section
,
4731 (struct reloc_std_external
*) relocs
,
4732 rel_size
, flaginfo
->contents
))
4737 if (! aout_link_input_section_ext (flaginfo
, input_bfd
, input_section
,
4738 (struct reloc_ext_external
*) relocs
,
4739 rel_size
, flaginfo
->contents
))
4743 /* Write out the section contents. */
4744 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
4745 input_section
->output_section
,
4746 (void *) flaginfo
->contents
,
4747 (file_ptr
) input_section
->output_offset
,
4751 /* If we are producing relocatable output, the relocs were
4752 modified, and we now write them out. */
4753 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
4755 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4757 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
4759 *reloff_ptr
+= rel_size
;
4761 /* Assert that the relocs have not run into the symbols, and
4762 that if these are the text relocs they have not run into the
4764 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
4765 && (reloff_ptr
!= &flaginfo
->treloff
4767 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
4773 /* Adjust and write out the symbols for an a.out file. Set the new
4774 symbol indices into a symbol_map. */
4777 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4780 bfd_size_type sym_count
;
4782 enum bfd_link_strip strip
;
4783 enum bfd_link_discard discard
;
4784 struct external_nlist
*outsym
;
4785 bfd_size_type strtab_index
;
4786 struct external_nlist
*sym
;
4787 struct external_nlist
*sym_end
;
4788 struct aout_link_hash_entry
**sym_hash
;
4791 bfd_boolean skip_next
;
4793 output_bfd
= flaginfo
->output_bfd
;
4794 sym_count
= obj_aout_external_sym_count (input_bfd
);
4795 strings
= obj_aout_external_strings (input_bfd
);
4796 strip
= flaginfo
->info
->strip
;
4797 discard
= flaginfo
->info
->discard
;
4798 outsym
= flaginfo
->output_syms
;
4800 /* First write out a symbol for this object file, unless we are
4801 discarding such symbols. */
4802 if (strip
!= strip_all
4803 && (strip
!= strip_some
4804 || bfd_hash_lookup (flaginfo
->info
->keep_hash
, input_bfd
->filename
,
4805 FALSE
, FALSE
) != NULL
)
4806 && discard
!= discard_all
)
4808 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4809 H_PUT_8 (output_bfd
, 0, outsym
->e_other
);
4810 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4811 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4812 input_bfd
->filename
, FALSE
);
4813 if (strtab_index
== (bfd_size_type
) -1)
4815 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4816 PUT_WORD (output_bfd
,
4817 (bfd_get_section_vma (output_bfd
,
4818 obj_textsec (input_bfd
)->output_section
)
4819 + obj_textsec (input_bfd
)->output_offset
),
4821 ++obj_aout_external_sym_count (output_bfd
);
4827 sym
= obj_aout_external_syms (input_bfd
);
4828 sym_end
= sym
+ sym_count
;
4829 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4830 symbol_map
= flaginfo
->symbol_map
;
4831 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4832 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4836 struct aout_link_hash_entry
*h
;
4842 /* We set *symbol_map to 0 above for all symbols. If it has
4843 already been set to -1 for this symbol, it means that we are
4844 discarding it because it appears in a duplicate header file.
4845 See the N_BINCL code below. */
4846 if (*symbol_map
== -1)
4849 /* Initialize *symbol_map to -1, which means that the symbol was
4850 not copied into the output file. We will change it later if
4851 we do copy the symbol over. */
4854 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4855 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4861 /* Pass this symbol through. It is the target of an
4862 indirect or warning symbol. */
4863 val
= GET_WORD (input_bfd
, sym
->e_value
);
4868 /* Skip this symbol, which is the target of an indirect
4869 symbol that we have changed to no longer be an indirect
4876 struct aout_link_hash_entry
*hresolve
;
4878 /* We have saved the hash table entry for this symbol, if
4879 there is one. Note that we could just look it up again
4880 in the hash table, provided we first check that it is an
4884 /* Use the name from the hash table, in case the symbol was
4887 && h
->root
.type
!= bfd_link_hash_warning
)
4888 name
= h
->root
.root
.string
;
4890 /* If this is an indirect or warning symbol, then change
4891 hresolve to the base symbol. We also change *sym_hash so
4892 that the relocation routines relocate against the real
4895 if (h
!= (struct aout_link_hash_entry
*) NULL
4896 && (h
->root
.type
== bfd_link_hash_indirect
4897 || h
->root
.type
== bfd_link_hash_warning
))
4899 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4900 while (hresolve
->root
.type
== bfd_link_hash_indirect
4901 || hresolve
->root
.type
== bfd_link_hash_warning
)
4902 hresolve
= ((struct aout_link_hash_entry
*)
4903 hresolve
->root
.u
.i
.link
);
4904 *sym_hash
= hresolve
;
4907 /* If the symbol has already been written out, skip it. */
4911 if ((type
& N_TYPE
) == N_INDR
4912 || type
== N_WARNING
)
4914 *symbol_map
= h
->indx
;
4918 /* See if we are stripping this symbol. */
4924 case strip_debugger
:
4925 if ((type
& N_STAB
) != 0)
4929 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
4944 /* Get the value of the symbol. */
4945 if ((type
& N_TYPE
) == N_TEXT
4947 symsec
= obj_textsec (input_bfd
);
4948 else if ((type
& N_TYPE
) == N_DATA
4950 symsec
= obj_datasec (input_bfd
);
4951 else if ((type
& N_TYPE
) == N_BSS
4953 symsec
= obj_bsssec (input_bfd
);
4954 else if ((type
& N_TYPE
) == N_ABS
4956 symsec
= bfd_abs_section_ptr
;
4957 else if (((type
& N_TYPE
) == N_INDR
4958 && (hresolve
== NULL
4959 || (hresolve
->root
.type
!= bfd_link_hash_defined
4960 && hresolve
->root
.type
!= bfd_link_hash_defweak
4961 && hresolve
->root
.type
!= bfd_link_hash_common
)))
4962 || type
== N_WARNING
)
4964 /* Pass the next symbol through unchanged. The
4965 condition above for indirect symbols is so that if
4966 the indirect symbol was defined, we output it with
4967 the correct definition so the debugger will
4970 val
= GET_WORD (input_bfd
, sym
->e_value
);
4973 else if ((type
& N_STAB
) != 0)
4975 val
= GET_WORD (input_bfd
, sym
->e_value
);
4980 /* If we get here with an indirect symbol, it means that
4981 we are outputting it with a real definition. In such
4982 a case we do not want to output the next symbol,
4983 which is the target of the indirection. */
4984 if ((type
& N_TYPE
) == N_INDR
)
4989 /* We need to get the value from the hash table. We use
4990 hresolve so that if we have defined an indirect
4991 symbol we output the final definition. */
4994 switch (type
& N_TYPE
)
4997 symsec
= obj_textsec (input_bfd
);
5000 symsec
= obj_datasec (input_bfd
);
5003 symsec
= obj_bsssec (input_bfd
);
5006 symsec
= bfd_abs_section_ptr
;
5013 else if (hresolve
->root
.type
== bfd_link_hash_defined
5014 || hresolve
->root
.type
== bfd_link_hash_defweak
)
5016 asection
*input_section
;
5017 asection
*output_section
;
5019 /* This case usually means a common symbol which was
5020 turned into a defined symbol. */
5021 input_section
= hresolve
->root
.u
.def
.section
;
5022 output_section
= input_section
->output_section
;
5023 BFD_ASSERT (bfd_is_abs_section (output_section
)
5024 || output_section
->owner
== output_bfd
);
5025 val
= (hresolve
->root
.u
.def
.value
5026 + bfd_get_section_vma (output_bfd
, output_section
)
5027 + input_section
->output_offset
);
5029 /* Get the correct type based on the section. If
5030 this is a constructed set, force it to be
5031 globally visible. */
5040 if (output_section
== obj_textsec (output_bfd
))
5041 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5044 else if (output_section
== obj_datasec (output_bfd
))
5045 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5048 else if (output_section
== obj_bsssec (output_bfd
))
5049 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5053 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5057 else if (hresolve
->root
.type
== bfd_link_hash_common
)
5058 val
= hresolve
->root
.u
.c
.size
;
5059 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
5068 val
= (symsec
->output_section
->vma
5069 + symsec
->output_offset
5070 + (GET_WORD (input_bfd
, sym
->e_value
)
5073 /* If this is a global symbol set the written flag, and if
5074 it is a local symbol see if we should discard it. */
5078 h
->indx
= obj_aout_external_sym_count (output_bfd
);
5080 else if ((type
& N_TYPE
) != N_SETT
5081 && (type
& N_TYPE
) != N_SETD
5082 && (type
& N_TYPE
) != N_SETB
5083 && (type
& N_TYPE
) != N_SETA
)
5088 case discard_sec_merge
:
5091 if ((type
& N_STAB
) == 0
5092 && bfd_is_local_label_name (input_bfd
, name
))
5106 /* An N_BINCL symbol indicates the start of the stabs
5107 entries for a header file. We need to scan ahead to the
5108 next N_EINCL symbol, ignoring nesting, adding up all the
5109 characters in the symbol names, not including the file
5110 numbers in types (the first number after an open
5112 if (type
== (int) N_BINCL
)
5114 struct external_nlist
*incl_sym
;
5116 struct aout_link_includes_entry
*incl_entry
;
5117 struct aout_link_includes_totals
*t
;
5121 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
5125 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5126 if (incl_type
== (int) N_EINCL
)
5132 else if (incl_type
== (int) N_BINCL
)
5138 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
5139 for (; *s
!= '\0'; s
++)
5144 /* Skip the file number. */
5146 while (ISDIGIT (*s
))
5154 /* If we have already included a header file with the
5155 same value, then replace this one with an N_EXCL
5157 copy
= (bfd_boolean
) (! flaginfo
->info
->keep_memory
);
5158 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
5160 if (incl_entry
== NULL
)
5162 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
5163 if (t
->total
== val
)
5167 /* This is the first time we have seen this header
5168 file with this set of stabs strings. */
5169 t
= (struct aout_link_includes_totals
*)
5170 bfd_hash_allocate (&flaginfo
->includes
.root
,
5175 t
->next
= incl_entry
->totals
;
5176 incl_entry
->totals
= t
;
5182 /* This is a duplicate header file. We must change
5183 it to be an N_EXCL entry, and mark all the
5184 included symbols to prevent outputting them. */
5185 type
= (int) N_EXCL
;
5188 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
5190 incl_sym
++, incl_map
++)
5194 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5195 if (incl_type
== (int) N_EINCL
)
5204 else if (incl_type
== (int) N_BINCL
)
5213 /* Copy this symbol into the list of symbols we are going to
5215 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
5216 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_other
), outsym
->e_other
);
5217 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
5219 if (! flaginfo
->info
->keep_memory
)
5221 /* name points into a string table which we are going to
5222 free. If there is a hash table entry, use that string.
5223 Otherwise, copy name into memory. */
5225 name
= h
->root
.root
.string
;
5229 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
5231 if (strtab_index
== (bfd_size_type
) -1)
5233 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
5234 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
5235 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
5236 ++obj_aout_external_sym_count (output_bfd
);
5240 /* Write out the output symbols we have just constructed. */
5241 if (outsym
> flaginfo
->output_syms
)
5243 bfd_size_type outsym_size
;
5245 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
5247 outsym_size
= outsym
- flaginfo
->output_syms
;
5248 outsym_size
*= EXTERNAL_NLIST_SIZE
;
5249 if (bfd_bwrite ((void *) flaginfo
->output_syms
, outsym_size
, output_bfd
)
5252 flaginfo
->symoff
+= outsym_size
;
5258 /* Link an a.out input BFD into the output file. */
5261 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
5263 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
5265 /* If this is a dynamic object, it may need special handling. */
5266 if ((input_bfd
->flags
& DYNAMIC
) != 0
5267 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
5268 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
5269 (flaginfo
->info
, input_bfd
));
5271 /* Get the symbols. We probably have them already, unless
5272 flaginfo->info->keep_memory is FALSE. */
5273 if (! aout_get_external_symbols (input_bfd
))
5276 /* Write out the symbols and get a map of the new indices. The map
5277 is placed into flaginfo->symbol_map. */
5278 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
5281 /* Relocate and write out the sections. These functions use the
5282 symbol map created by aout_link_write_symbols. The linker_mark
5283 field will be set if these sections are to be included in the
5284 link, which will normally be the case. */
5285 if (obj_textsec (input_bfd
)->linker_mark
)
5287 if (! aout_link_input_section (flaginfo
, input_bfd
,
5288 obj_textsec (input_bfd
),
5290 exec_hdr (input_bfd
)->a_trsize
))
5293 if (obj_datasec (input_bfd
)->linker_mark
)
5295 if (! aout_link_input_section (flaginfo
, input_bfd
,
5296 obj_datasec (input_bfd
),
5298 exec_hdr (input_bfd
)->a_drsize
))
5302 /* If we are not keeping memory, we don't need the symbols any
5303 longer. We still need them if we are keeping memory, because the
5304 strings in the hash table point into them. */
5305 if (! flaginfo
->info
->keep_memory
)
5307 if (! aout_link_free_symbols (input_bfd
))
5314 /* Do the final link step. This is called on the output BFD. The
5315 INFO structure should point to a list of BFDs linked through the
5316 link.next field which can be used to find each BFD which takes part
5317 in the output. Also, each section in ABFD should point to a list
5318 of bfd_link_order structures which list all the input sections for
5319 the output section. */
5322 NAME (aout
, final_link
) (bfd
*abfd
,
5323 struct bfd_link_info
*info
,
5324 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
5326 struct aout_final_link_info aout_info
;
5327 bfd_boolean includes_hash_initialized
= FALSE
;
5329 bfd_size_type trsize
, drsize
;
5330 bfd_size_type max_contents_size
;
5331 bfd_size_type max_relocs_size
;
5332 bfd_size_type max_sym_count
;
5333 struct bfd_link_order
*p
;
5335 bfd_boolean have_link_order_relocs
;
5337 if (bfd_link_pic (info
))
5338 abfd
->flags
|= DYNAMIC
;
5340 aout_info
.info
= info
;
5341 aout_info
.output_bfd
= abfd
;
5342 aout_info
.contents
= NULL
;
5343 aout_info
.relocs
= NULL
;
5344 aout_info
.symbol_map
= NULL
;
5345 aout_info
.output_syms
= NULL
;
5347 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
5348 aout_link_includes_newfunc
,
5349 sizeof (struct aout_link_includes_entry
),
5352 includes_hash_initialized
= TRUE
;
5354 /* Figure out the largest section size. Also, if generating
5355 relocatable output, count the relocs. */
5358 max_contents_size
= 0;
5359 max_relocs_size
= 0;
5361 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5365 if (bfd_link_relocatable (info
))
5367 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5369 trsize
+= exec_hdr (sub
)->a_trsize
;
5370 drsize
+= exec_hdr (sub
)->a_drsize
;
5374 /* FIXME: We need to identify the .text and .data sections
5375 and call get_reloc_upper_bound and canonicalize_reloc to
5376 work out the number of relocs needed, and then multiply
5377 by the reloc size. */
5379 (_("%s: relocatable link from %s to %s not supported"),
5380 bfd_get_filename (abfd
),
5381 sub
->xvec
->name
, abfd
->xvec
->name
);
5382 bfd_set_error (bfd_error_invalid_operation
);
5387 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5389 sz
= obj_textsec (sub
)->size
;
5390 if (sz
> max_contents_size
)
5391 max_contents_size
= sz
;
5392 sz
= obj_datasec (sub
)->size
;
5393 if (sz
> max_contents_size
)
5394 max_contents_size
= sz
;
5396 sz
= exec_hdr (sub
)->a_trsize
;
5397 if (sz
> max_relocs_size
)
5398 max_relocs_size
= sz
;
5399 sz
= exec_hdr (sub
)->a_drsize
;
5400 if (sz
> max_relocs_size
)
5401 max_relocs_size
= sz
;
5403 sz
= obj_aout_external_sym_count (sub
);
5404 if (sz
> max_sym_count
)
5409 if (bfd_link_relocatable (info
))
5411 if (obj_textsec (abfd
) != NULL
)
5412 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
5413 ->map_head
.link_order
)
5414 * obj_reloc_entry_size (abfd
));
5415 if (obj_datasec (abfd
) != NULL
)
5416 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
5417 ->map_head
.link_order
)
5418 * obj_reloc_entry_size (abfd
));
5421 exec_hdr (abfd
)->a_trsize
= trsize
;
5422 exec_hdr (abfd
)->a_drsize
= drsize
;
5424 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
5426 /* Adjust the section sizes and vmas according to the magic number.
5427 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5428 filepos for each section. */
5429 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
5432 /* The relocation and symbol file positions differ among a.out
5433 targets. We are passed a callback routine from the backend
5434 specific code to handle this.
5435 FIXME: At this point we do not know how much space the symbol
5436 table will require. This will not work for any (nonstandard)
5437 a.out target that needs to know the symbol table size before it
5438 can compute the relocation file positions. This may or may not
5439 be the case for the hp300hpux target, for example. */
5440 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
5442 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
5443 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
5444 obj_sym_filepos (abfd
) = aout_info
.symoff
;
5446 /* We keep a count of the symbols as we output them. */
5447 obj_aout_external_sym_count (abfd
) = 0;
5449 /* We accumulate the string table as we write out the symbols. */
5450 aout_info
.strtab
= _bfd_stringtab_init ();
5451 if (aout_info
.strtab
== NULL
)
5454 /* Allocate buffers to hold section contents and relocs. */
5455 aout_info
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5456 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
5457 aout_info
.symbol_map
= (int *) bfd_malloc (max_sym_count
* sizeof (int));
5458 aout_info
.output_syms
= (struct external_nlist
*)
5459 bfd_malloc ((max_sym_count
+ 1) * sizeof (struct external_nlist
));
5460 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
5461 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
5462 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
5463 || aout_info
.output_syms
== NULL
)
5466 /* If we have a symbol named __DYNAMIC, force it out now. This is
5467 required by SunOS. Doing this here rather than in sunos.c is a
5468 hack, but it's easier than exporting everything which would be
5471 struct aout_link_hash_entry
*h
;
5473 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
5474 FALSE
, FALSE
, FALSE
);
5476 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
5479 /* The most time efficient way to do the link would be to read all
5480 the input object files into memory and then sort out the
5481 information into the output file. Unfortunately, that will
5482 probably use too much memory. Another method would be to step
5483 through everything that composes the text section and write it
5484 out, and then everything that composes the data section and write
5485 it out, and then write out the relocs, and then write out the
5486 symbols. Unfortunately, that requires reading stuff from each
5487 input file several times, and we will not be able to keep all the
5488 input files open simultaneously, and reopening them will be slow.
5490 What we do is basically process one input file at a time. We do
5491 everything we need to do with an input file once--copy over the
5492 section contents, handle the relocation information, and write
5493 out the symbols--and then we throw away the information we read
5494 from it. This approach requires a lot of lseeks of the output
5495 file, which is unfortunate but still faster than reopening a lot
5498 We use the output_has_begun field of the input BFDs to see
5499 whether we have already handled it. */
5500 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5501 sub
->output_has_begun
= FALSE
;
5503 /* Mark all sections which are to be included in the link. This
5504 will normally be every section. We need to do this so that we
5505 can identify any sections which the linker has decided to not
5507 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5509 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5510 if (p
->type
== bfd_indirect_link_order
)
5511 p
->u
.indirect
.section
->linker_mark
= TRUE
;
5514 have_link_order_relocs
= FALSE
;
5515 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5517 for (p
= o
->map_head
.link_order
;
5521 if (p
->type
== bfd_indirect_link_order
5522 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
5523 == bfd_target_aout_flavour
))
5527 input_bfd
= p
->u
.indirect
.section
->owner
;
5528 if (! input_bfd
->output_has_begun
)
5530 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
5532 input_bfd
->output_has_begun
= TRUE
;
5535 else if (p
->type
== bfd_section_reloc_link_order
5536 || p
->type
== bfd_symbol_reloc_link_order
)
5538 /* These are handled below. */
5539 have_link_order_relocs
= TRUE
;
5543 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5549 /* Write out any symbols that we have not already written out. */
5550 bfd_hash_traverse (&info
->hash
->table
,
5551 aout_link_write_other_symbol
,
5554 /* Now handle any relocs we were asked to create by the linker.
5555 These did not come from any input file. We must do these after
5556 we have written out all the symbols, so that we know the symbol
5558 if (have_link_order_relocs
)
5560 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5562 for (p
= o
->map_head
.link_order
;
5566 if (p
->type
== bfd_section_reloc_link_order
5567 || p
->type
== bfd_symbol_reloc_link_order
)
5569 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
5576 if (aout_info
.contents
!= NULL
)
5578 free (aout_info
.contents
);
5579 aout_info
.contents
= NULL
;
5581 if (aout_info
.relocs
!= NULL
)
5583 free (aout_info
.relocs
);
5584 aout_info
.relocs
= NULL
;
5586 if (aout_info
.symbol_map
!= NULL
)
5588 free (aout_info
.symbol_map
);
5589 aout_info
.symbol_map
= NULL
;
5591 if (aout_info
.output_syms
!= NULL
)
5593 free (aout_info
.output_syms
);
5594 aout_info
.output_syms
= NULL
;
5596 if (includes_hash_initialized
)
5598 bfd_hash_table_free (&aout_info
.includes
.root
);
5599 includes_hash_initialized
= FALSE
;
5602 /* Finish up any dynamic linking we may be doing. */
5603 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
5605 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
5609 /* Update the header information. */
5610 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
5611 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
5612 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
5613 obj_textsec (abfd
)->reloc_count
=
5614 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
5615 obj_datasec (abfd
)->reloc_count
=
5616 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
5618 /* Write out the string table, unless there are no symbols. */
5619 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
5621 if (abfd
->symcount
> 0)
5623 if (!emit_stringtab (abfd
, aout_info
.strtab
))
5628 bfd_byte b
[BYTES_IN_WORD
];
5630 memset (b
, 0, BYTES_IN_WORD
);
5631 if (bfd_bwrite (b
, (bfd_size_type
) BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
5638 if (aout_info
.contents
!= NULL
)
5639 free (aout_info
.contents
);
5640 if (aout_info
.relocs
!= NULL
)
5641 free (aout_info
.relocs
);
5642 if (aout_info
.symbol_map
!= NULL
)
5643 free (aout_info
.symbol_map
);
5644 if (aout_info
.output_syms
!= NULL
)
5645 free (aout_info
.output_syms
);
5646 if (includes_hash_initialized
)
5647 bfd_hash_table_free (&aout_info
.includes
.root
);