1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2018 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, and
37 386 a.out files, to create a target jump vector for a specific
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 and @file{demo64.c} for a demonstration of a 64 bit a.out format.
44 The base file @file{aoutx.h} defines general mechanisms for
45 reading and writing records to and from disk and various
46 other methods which BFD requires. It is included by
47 @file{aout32.c} and @file{aout64.c} to form the names
48 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
50 As an example, this is what goes on to make the back end for a
51 sun4, from @file{aout32.c}:
53 | #define ARCH_SIZE 32
59 | aout_32_canonicalize_reloc
60 | aout_32_find_nearest_line
62 | aout_32_get_reloc_upper_bound
67 | #define TARGET_NAME "a.out-sunos-big"
68 | #define VECNAME sparc_aout_sunos_be_vec
71 requires all the names from @file{aout32.c}, and produces the jump vector
73 | sparc_aout_sunos_be_vec
75 The file @file{host-aout.c} is a special case. It is for a large set
76 of hosts that use ``more or less standard'' a.out files, and
77 for which cross-debugging is not interesting. It uses the
78 standard 32-bit a.out support routines, but determines the
79 file offsets and addresses of the text, data, and BSS
80 sections, the machine architecture and machine type, and the
81 entry point address, in a host-dependent manner. Once these
82 values have been determined, generic code is used to handle
85 When porting it to run on a new system, you must supply:
89 | HOST_MACHINE_ARCH (optional)
90 | HOST_MACHINE_MACHINE (optional)
91 | HOST_TEXT_START_ADDR
94 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
95 values, plus the structures and macros defined in @file{a.out.h} on
96 your host system, will produce a BFD target that will access
97 ordinary a.out files on your host. To configure a new machine
98 to use @file{host-aout.c}, specify:
100 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
101 | TDEPFILES= host-aout.o trad-core.o
103 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
105 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
106 configuration is selected. */
109 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
110 Doesn't matter what the setting of WP_TEXT is on output, but it'll
112 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
113 * Any BFD with both flags clear is OMAGIC.
114 (Just want to make these explicit, so the conditions tested in this
115 file make sense if you're more familiar with a.out than with BFD.) */
117 #define KEEPIT udata.i
121 #include "safe-ctype.h"
126 #include "aout/aout64.h"
127 #include "aout/stab_gnu.h"
135 The file @file{aoutx.h} provides for both the @emph{standard}
136 and @emph{extended} forms of a.out relocation records.
138 The standard records contain only an address, a symbol index,
139 and a type field. The extended records also have a full
140 integer for an addend. */
142 #ifndef CTOR_TABLE_RELOC_HOWTO
143 #define CTOR_TABLE_RELOC_IDX 2
144 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
145 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
146 ? howto_table_ext : howto_table_std) \
147 + CTOR_TABLE_RELOC_IDX)
150 #ifndef MY_swap_std_reloc_in
151 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
154 #ifndef MY_swap_ext_reloc_in
155 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
158 #ifndef MY_swap_std_reloc_out
159 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
162 #ifndef MY_swap_ext_reloc_out
163 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
166 #ifndef MY_final_link_relocate
167 #define MY_final_link_relocate _bfd_final_link_relocate
170 #ifndef MY_relocate_contents
171 #define MY_relocate_contents _bfd_relocate_contents
174 #define howto_table_ext NAME (aout, ext_howto_table)
175 #define howto_table_std NAME (aout, std_howto_table)
177 reloc_howto_type howto_table_ext
[] =
179 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
180 HOWTO (RELOC_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
, 0, "8", FALSE
, 0, 0x000000ff, FALSE
),
181 HOWTO (RELOC_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
, 0, "16", FALSE
, 0, 0x0000ffff, FALSE
),
182 HOWTO (RELOC_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "32", FALSE
, 0, 0xffffffff, FALSE
),
183 HOWTO (RELOC_DISP8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0, "DISP8", FALSE
, 0, 0x000000ff, FALSE
),
184 HOWTO (RELOC_DISP16
, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0, "DISP16", FALSE
, 0, 0x0000ffff, FALSE
),
185 HOWTO (RELOC_DISP32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0, "DISP32", FALSE
, 0, 0xffffffff, FALSE
),
186 HOWTO (RELOC_WDISP30
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "WDISP30", FALSE
, 0, 0x3fffffff, FALSE
),
187 HOWTO (RELOC_WDISP22
, 2, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "WDISP22", FALSE
, 0, 0x003fffff, FALSE
),
188 HOWTO (RELOC_HI22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "HI22", FALSE
, 0, 0x003fffff, FALSE
),
189 HOWTO (RELOC_22
, 0, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "22", FALSE
, 0, 0x003fffff, FALSE
),
190 HOWTO (RELOC_13
, 0, 2, 13, FALSE
, 0, complain_overflow_bitfield
, 0, "13", FALSE
, 0, 0x00001fff, FALSE
),
191 HOWTO (RELOC_LO10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "LO10", FALSE
, 0, 0x000003ff, FALSE
),
192 HOWTO (RELOC_SFA_BASE
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_BASE", FALSE
, 0, 0xffffffff, FALSE
),
193 HOWTO (RELOC_SFA_OFF13
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_OFF13", FALSE
, 0, 0xffffffff, FALSE
),
194 HOWTO (RELOC_BASE10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "BASE10", FALSE
, 0, 0x000003ff, FALSE
),
195 HOWTO (RELOC_BASE13
, 0, 2, 13, FALSE
, 0, complain_overflow_signed
, 0, "BASE13", FALSE
, 0, 0x00001fff, FALSE
),
196 HOWTO (RELOC_BASE22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "BASE22", FALSE
, 0, 0x003fffff, FALSE
),
197 HOWTO (RELOC_PC10
, 0, 2, 10, TRUE
, 0, complain_overflow_dont
, 0, "PC10", FALSE
, 0, 0x000003ff, TRUE
),
198 HOWTO (RELOC_PC22
, 10, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "PC22", FALSE
, 0, 0x003fffff, TRUE
),
199 HOWTO (RELOC_JMP_TBL
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "JMP_TBL", FALSE
, 0, 0x3fffffff, FALSE
),
200 HOWTO (RELOC_SEGOFF16
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "SEGOFF16", FALSE
, 0, 0x00000000, FALSE
),
201 HOWTO (RELOC_GLOB_DAT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "GLOB_DAT", FALSE
, 0, 0x00000000, FALSE
),
202 HOWTO (RELOC_JMP_SLOT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "JMP_SLOT", FALSE
, 0, 0x00000000, FALSE
),
203 HOWTO (RELOC_RELATIVE
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "RELATIVE", FALSE
, 0, 0x00000000, FALSE
),
204 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
205 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
206 #define RELOC_SPARC_REV32 RELOC_WDISP19
207 HOWTO (RELOC_SPARC_REV32
, 0, 2, 32, FALSE
, 0, complain_overflow_dont
, 0,"R_SPARC_REV32",FALSE
, 0, 0xffffffff, FALSE
),
210 /* Convert standard reloc records to "arelent" format (incl byte swap). */
212 reloc_howto_type howto_table_std
[] =
214 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
215 HOWTO ( 0, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,0,"8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
216 HOWTO ( 1, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
217 HOWTO ( 2, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
218 HOWTO ( 3, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,0,"64", TRUE
, 0xdeaddead,0xdeaddead, FALSE
),
219 HOWTO ( 4, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0,"DISP8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
220 HOWTO ( 5, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0,"DISP16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
221 HOWTO ( 6, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0,"DISP32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
222 HOWTO ( 7, 0, 4, 64, TRUE
, 0, complain_overflow_signed
, 0,"DISP64", TRUE
, 0xfeedface,0xfeedface, FALSE
),
223 HOWTO ( 8, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"GOT_REL", FALSE
, 0,0x00000000, FALSE
),
224 HOWTO ( 9, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"BASE16", FALSE
,0xffffffff,0xffffffff, FALSE
),
225 HOWTO (10, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"BASE32", FALSE
,0xffffffff,0xffffffff, FALSE
),
231 HOWTO (16, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"JMP_TABLE", FALSE
, 0,0x00000000, FALSE
),
247 HOWTO (32, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"RELATIVE", FALSE
, 0,0x00000000, FALSE
),
255 HOWTO (40, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"BASEREL", FALSE
, 0,0x00000000, FALSE
),
258 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
261 NAME (aout
, reloc_type_lookup
) (bfd
*abfd
, bfd_reloc_code_real_type code
)
263 #define EXT(i, j) case i: return & howto_table_ext [j]
264 #define STD(i, j) case i: return & howto_table_std [j]
265 int ext
= obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
;
267 if (code
== BFD_RELOC_CTOR
)
268 switch (bfd_arch_bits_per_address (abfd
))
281 EXT (BFD_RELOC_8
, 0);
282 EXT (BFD_RELOC_16
, 1);
283 EXT (BFD_RELOC_32
, 2);
284 EXT (BFD_RELOC_HI22
, 8);
285 EXT (BFD_RELOC_LO10
, 11);
286 EXT (BFD_RELOC_32_PCREL_S2
, 6);
287 EXT (BFD_RELOC_SPARC_WDISP22
, 7);
288 EXT (BFD_RELOC_SPARC13
, 10);
289 EXT (BFD_RELOC_SPARC_GOT10
, 14);
290 EXT (BFD_RELOC_SPARC_BASE13
, 15);
291 EXT (BFD_RELOC_SPARC_GOT13
, 15);
292 EXT (BFD_RELOC_SPARC_GOT22
, 16);
293 EXT (BFD_RELOC_SPARC_PC10
, 17);
294 EXT (BFD_RELOC_SPARC_PC22
, 18);
295 EXT (BFD_RELOC_SPARC_WPLT30
, 19);
296 EXT (BFD_RELOC_SPARC_REV32
, 26);
304 STD (BFD_RELOC_8
, 0);
305 STD (BFD_RELOC_16
, 1);
306 STD (BFD_RELOC_32
, 2);
307 STD (BFD_RELOC_8_PCREL
, 4);
308 STD (BFD_RELOC_16_PCREL
, 5);
309 STD (BFD_RELOC_32_PCREL
, 6);
310 STD (BFD_RELOC_16_BASEREL
, 9);
311 STD (BFD_RELOC_32_BASEREL
, 10);
318 NAME (aout
, reloc_name_lookup
) (bfd
*abfd
, const char *r_name
)
320 unsigned int i
, size
;
321 reloc_howto_type
*howto_table
;
323 if (obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
)
325 howto_table
= howto_table_ext
;
326 size
= sizeof (howto_table_ext
) / sizeof (howto_table_ext
[0]);
330 howto_table
= howto_table_std
;
331 size
= sizeof (howto_table_std
) / sizeof (howto_table_std
[0]);
334 for (i
= 0; i
< size
; i
++)
335 if (howto_table
[i
].name
!= NULL
336 && strcasecmp (howto_table
[i
].name
, r_name
) == 0)
337 return &howto_table
[i
];
344 Internal entry points
347 @file{aoutx.h} exports several routines for accessing the
348 contents of an a.out file, which are gathered and exported in
349 turn by various format specific files (eg sunos.c).
354 aout_@var{size}_swap_exec_header_in
357 void aout_@var{size}_swap_exec_header_in,
359 struct external_exec *bytes,
360 struct internal_exec *execp);
363 Swap the information in an executable header @var{raw_bytes} taken
364 from a raw byte stream memory image into the internal exec header
365 structure @var{execp}.
368 #ifndef NAME_swap_exec_header_in
370 NAME (aout
, swap_exec_header_in
) (bfd
*abfd
,
371 struct external_exec
*bytes
,
372 struct internal_exec
*execp
)
374 /* The internal_exec structure has some fields that are unused in this
375 configuration (IE for i960), so ensure that all such uninitialized
376 fields are zero'd out. There are places where two of these structs
377 are memcmp'd, and thus the contents do matter. */
378 memset ((void *) execp
, 0, sizeof (struct internal_exec
));
379 /* Now fill in fields in the execp, from the bytes in the raw data. */
380 execp
->a_info
= H_GET_32 (abfd
, bytes
->e_info
);
381 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
382 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
383 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
384 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
385 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
386 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
387 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
389 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
394 aout_@var{size}_swap_exec_header_out
397 void aout_@var{size}_swap_exec_header_out
399 struct internal_exec *execp,
400 struct external_exec *raw_bytes);
403 Swap the information in an internal exec header structure
404 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
407 NAME (aout
, swap_exec_header_out
) (bfd
*abfd
,
408 struct internal_exec
*execp
,
409 struct external_exec
*bytes
)
411 /* Now fill in fields in the raw data, from the fields in the exec struct. */
412 H_PUT_32 (abfd
, execp
->a_info
, bytes
->e_info
);
413 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
414 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
415 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
416 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
417 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
418 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
419 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
422 /* Make all the section for an a.out file. */
425 NAME (aout
, make_sections
) (bfd
*abfd
)
427 if (obj_textsec (abfd
) == NULL
&& bfd_make_section (abfd
, ".text") == NULL
)
429 if (obj_datasec (abfd
) == NULL
&& bfd_make_section (abfd
, ".data") == NULL
)
431 if (obj_bsssec (abfd
) == NULL
&& bfd_make_section (abfd
, ".bss") == NULL
)
438 aout_@var{size}_some_aout_object_p
441 const bfd_target *aout_@var{size}_some_aout_object_p
443 struct internal_exec *execp,
444 const bfd_target *(*callback_to_real_object_p) (bfd *));
447 Some a.out variant thinks that the file open in @var{abfd}
448 checking is an a.out file. Do some more checking, and set up
449 for access if it really is. Call back to the calling
450 environment's "finish up" function just before returning, to
451 handle any last-minute setup.
455 NAME (aout
, some_aout_object_p
) (bfd
*abfd
,
456 struct internal_exec
*execp
,
457 const bfd_target
*(*callback_to_real_object_p
) (bfd
*))
459 struct aout_data_struct
*rawptr
, *oldrawptr
;
460 const bfd_target
*result
;
461 bfd_size_type amt
= sizeof (* rawptr
);
463 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
467 oldrawptr
= abfd
->tdata
.aout_data
;
468 abfd
->tdata
.aout_data
= rawptr
;
470 /* Copy the contents of the old tdata struct.
471 In particular, we want the subformat, since for hpux it was set in
472 hp300hpux.c:swap_exec_header_in and will be used in
473 hp300hpux.c:callback. */
474 if (oldrawptr
!= NULL
)
475 *abfd
->tdata
.aout_data
= *oldrawptr
;
477 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
478 /* Copy in the internal_exec struct. */
479 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
;
480 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
482 /* Set the file flags. */
483 abfd
->flags
= BFD_NO_FLAGS
;
484 if (execp
->a_drsize
|| execp
->a_trsize
)
485 abfd
->flags
|= HAS_RELOC
;
486 /* Setting of EXEC_P has been deferred to the bottom of this function. */
488 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
489 if (N_DYNAMIC (execp
))
490 abfd
->flags
|= DYNAMIC
;
492 if (N_MAGIC (execp
) == ZMAGIC
)
494 abfd
->flags
|= D_PAGED
| WP_TEXT
;
495 adata (abfd
).magic
= z_magic
;
497 else if (N_MAGIC (execp
) == QMAGIC
)
499 abfd
->flags
|= D_PAGED
| WP_TEXT
;
500 adata (abfd
).magic
= z_magic
;
501 adata (abfd
).subformat
= q_magic_format
;
503 else if (N_MAGIC (execp
) == NMAGIC
)
505 abfd
->flags
|= WP_TEXT
;
506 adata (abfd
).magic
= n_magic
;
508 else if (N_MAGIC (execp
) == OMAGIC
509 || N_MAGIC (execp
) == BMAGIC
)
510 adata (abfd
).magic
= o_magic
;
512 /* Should have been checked with N_BADMAG before this routine
516 bfd_get_start_address (abfd
) = execp
->a_entry
;
518 obj_aout_symbols (abfd
) = NULL
;
519 bfd_get_symcount (abfd
) = execp
->a_syms
/ sizeof (struct external_nlist
);
521 /* The default relocation entry size is that of traditional V7 Unix. */
522 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
524 /* The default symbol entry size is that of traditional Unix. */
525 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
528 bfd_init_window (&obj_aout_sym_window (abfd
));
529 bfd_init_window (&obj_aout_string_window (abfd
));
531 obj_aout_external_syms (abfd
) = NULL
;
532 obj_aout_external_strings (abfd
) = NULL
;
533 obj_aout_sym_hashes (abfd
) = NULL
;
535 if (! NAME (aout
, make_sections
) (abfd
))
538 obj_datasec (abfd
)->size
= execp
->a_data
;
539 obj_bsssec (abfd
)->size
= execp
->a_bss
;
541 obj_textsec (abfd
)->flags
=
542 (execp
->a_trsize
!= 0
543 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
544 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
545 obj_datasec (abfd
)->flags
=
546 (execp
->a_drsize
!= 0
547 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
548 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
549 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
551 #ifdef THIS_IS_ONLY_DOCUMENTATION
552 /* The common code can't fill in these things because they depend
553 on either the start address of the text segment, the rounding
554 up of virtual addresses between segments, or the starting file
555 position of the text segment -- all of which varies among different
556 versions of a.out. */
558 /* Call back to the format-dependent code to fill in the rest of the
559 fields and do any further cleanup. Things that should be filled
560 in by the callback: */
562 struct exec
*execp
= exec_hdr (abfd
);
564 obj_textsec (abfd
)->size
= N_TXTSIZE (execp
);
565 /* Data and bss are already filled in since they're so standard. */
567 /* The virtual memory addresses of the sections. */
568 obj_textsec (abfd
)->vma
= N_TXTADDR (execp
);
569 obj_datasec (abfd
)->vma
= N_DATADDR (execp
);
570 obj_bsssec (abfd
)->vma
= N_BSSADDR (execp
);
572 /* The file offsets of the sections. */
573 obj_textsec (abfd
)->filepos
= N_TXTOFF (execp
);
574 obj_datasec (abfd
)->filepos
= N_DATOFF (execp
);
576 /* The file offsets of the relocation info. */
577 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF (execp
);
578 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF (execp
);
580 /* The file offsets of the string table and symbol table. */
581 obj_str_filepos (abfd
) = N_STROFF (execp
);
582 obj_sym_filepos (abfd
) = N_SYMOFF (execp
);
584 /* Determine the architecture and machine type of the object file. */
585 switch (N_MACHTYPE (exec_hdr (abfd
)))
588 abfd
->obj_arch
= bfd_arch_obscure
;
592 adata (abfd
)->page_size
= TARGET_PAGE_SIZE
;
593 adata (abfd
)->segment_size
= SEGMENT_SIZE
;
594 adata (abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
598 /* The architecture is encoded in various ways in various a.out variants,
599 or is not encoded at all in some of them. The relocation size depends
600 on the architecture and the a.out variant. Finally, the return value
601 is the bfd_target vector in use. If an error occurs, return zero and
602 set bfd_error to the appropriate error code.
604 Formats such as b.out, which have additional fields in the a.out
605 header, should cope with them in this callback as well. */
606 #endif /* DOCUMENTATION */
608 result
= (*callback_to_real_object_p
) (abfd
);
610 /* Now that the segment addresses have been worked out, take a better
611 guess at whether the file is executable. If the entry point
612 is within the text segment, assume it is. (This makes files
613 executable even if their entry point address is 0, as long as
614 their text starts at zero.).
616 This test had to be changed to deal with systems where the text segment
617 runs at a different location than the default. The problem is that the
618 entry address can appear to be outside the text segment, thus causing an
619 erroneous conclusion that the file isn't executable.
621 To fix this, we now accept any non-zero entry point as an indication of
622 executability. This will work most of the time, since only the linker
623 sets the entry point, and that is likely to be non-zero for most systems. */
625 if (execp
->a_entry
!= 0
626 || (execp
->a_entry
>= obj_textsec (abfd
)->vma
627 && execp
->a_entry
< (obj_textsec (abfd
)->vma
628 + obj_textsec (abfd
)->size
)
629 && execp
->a_trsize
== 0
630 && execp
->a_drsize
== 0))
631 abfd
->flags
|= EXEC_P
;
635 struct stat stat_buf
;
637 /* The original heuristic doesn't work in some important cases.
638 The a.out file has no information about the text start
639 address. For files (like kernels) linked to non-standard
640 addresses (ld -Ttext nnn) the entry point may not be between
641 the default text start (obj_textsec(abfd)->vma) and
642 (obj_textsec(abfd)->vma) + text size. This is not just a mach
643 issue. Many kernels are loaded at non standard addresses. */
644 if (abfd
->iostream
!= NULL
645 && (abfd
->flags
& BFD_IN_MEMORY
) == 0
646 && (fstat (fileno ((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
647 && ((stat_buf
.st_mode
& 0111) != 0))
648 abfd
->flags
|= EXEC_P
;
650 #endif /* STAT_FOR_EXEC */
656 bfd_release (abfd
, rawptr
);
657 abfd
->tdata
.aout_data
= oldrawptr
;
663 aout_@var{size}_mkobject
666 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
669 Initialize BFD @var{abfd} for use with a.out files.
673 NAME (aout
, mkobject
) (bfd
*abfd
)
675 struct aout_data_struct
*rawptr
;
676 bfd_size_type amt
= sizeof (* rawptr
);
678 bfd_set_error (bfd_error_system_call
);
680 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
684 abfd
->tdata
.aout_data
= rawptr
;
685 exec_hdr (abfd
) = &(rawptr
->e
);
687 obj_textsec (abfd
) = NULL
;
688 obj_datasec (abfd
) = NULL
;
689 obj_bsssec (abfd
) = NULL
;
696 aout_@var{size}_machine_type
699 enum machine_type aout_@var{size}_machine_type
700 (enum bfd_architecture arch,
701 unsigned long machine,
702 bfd_boolean *unknown);
705 Keep track of machine architecture and machine type for
706 a.out's. Return the <<machine_type>> for a particular
707 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
708 and machine can't be represented in a.out format.
710 If the architecture is understood, machine type 0 (default)
711 is always understood.
715 NAME (aout
, machine_type
) (enum bfd_architecture arch
,
716 unsigned long machine
,
717 bfd_boolean
*unknown
)
719 enum machine_type arch_flags
;
721 arch_flags
= M_UNKNOWN
;
728 || machine
== bfd_mach_sparc
729 || machine
== bfd_mach_sparc_sparclite
730 || machine
== bfd_mach_sparc_sparclite_le
731 || machine
== bfd_mach_sparc_v8plus
732 || machine
== bfd_mach_sparc_v8plusa
733 || machine
== bfd_mach_sparc_v8plusb
734 || machine
== bfd_mach_sparc_v8plusc
735 || machine
== bfd_mach_sparc_v8plusd
736 || machine
== bfd_mach_sparc_v8pluse
737 || machine
== bfd_mach_sparc_v8plusv
738 || machine
== bfd_mach_sparc_v8plusm
739 || machine
== bfd_mach_sparc_v8plusm8
740 || machine
== bfd_mach_sparc_v9
741 || machine
== bfd_mach_sparc_v9a
742 || machine
== bfd_mach_sparc_v9b
743 || machine
== bfd_mach_sparc_v9c
744 || machine
== bfd_mach_sparc_v9d
745 || machine
== bfd_mach_sparc_v9e
746 || machine
== bfd_mach_sparc_v9v
747 || machine
== bfd_mach_sparc_v9m
748 || machine
== bfd_mach_sparc_v9m8
)
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)
844 arch_flags
= M_UNKNOWN
;
847 if (arch_flags
!= M_UNKNOWN
)
855 aout_@var{size}_set_arch_mach
858 bfd_boolean aout_@var{size}_set_arch_mach,
860 enum bfd_architecture arch,
861 unsigned long machine);
864 Set the architecture and the machine of the BFD @var{abfd} to the
865 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
866 can support the architecture required.
870 NAME (aout
, set_arch_mach
) (bfd
*abfd
,
871 enum bfd_architecture arch
,
872 unsigned long machine
)
874 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
877 if (arch
!= bfd_arch_unknown
)
881 NAME (aout
, machine_type
) (arch
, machine
, &unknown
);
886 /* Determine the size of a relocation entry. */
891 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
894 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
898 return (*aout_backend_info (abfd
)->set_sizes
) (abfd
);
902 adjust_o_magic (bfd
*abfd
, struct internal_exec
*execp
)
904 file_ptr pos
= adata (abfd
).exec_bytes_size
;
909 obj_textsec (abfd
)->filepos
= pos
;
910 if (!obj_textsec (abfd
)->user_set_vma
)
911 obj_textsec (abfd
)->vma
= vma
;
913 vma
= obj_textsec (abfd
)->vma
;
915 pos
+= obj_textsec (abfd
)->size
;
916 vma
+= obj_textsec (abfd
)->size
;
919 if (!obj_datasec (abfd
)->user_set_vma
)
921 obj_textsec (abfd
)->size
+= pad
;
924 obj_datasec (abfd
)->vma
= vma
;
927 vma
= obj_datasec (abfd
)->vma
;
928 obj_datasec (abfd
)->filepos
= pos
;
929 pos
+= obj_datasec (abfd
)->size
;
930 vma
+= obj_datasec (abfd
)->size
;
933 if (!obj_bsssec (abfd
)->user_set_vma
)
935 obj_datasec (abfd
)->size
+= pad
;
938 obj_bsssec (abfd
)->vma
= vma
;
942 /* The VMA of the .bss section is set by the VMA of the
943 .data section plus the size of the .data section. We may
944 need to add padding bytes to make this true. */
945 pad
= obj_bsssec (abfd
)->vma
- vma
;
948 obj_datasec (abfd
)->size
+= pad
;
952 obj_bsssec (abfd
)->filepos
= pos
;
954 /* Fix up the exec header. */
955 execp
->a_text
= obj_textsec (abfd
)->size
;
956 execp
->a_data
= obj_datasec (abfd
)->size
;
957 execp
->a_bss
= obj_bsssec (abfd
)->size
;
958 N_SET_MAGIC (execp
, OMAGIC
);
962 adjust_z_magic (bfd
*abfd
, struct internal_exec
*execp
)
964 bfd_size_type data_pad
, text_pad
;
966 const struct aout_backend_data
*abdp
;
967 /* TRUE if text includes exec header. */
970 abdp
= aout_backend_info (abfd
);
974 && (abdp
->text_includes_header
975 || obj_aout_subformat (abfd
) == q_magic_format
));
976 obj_textsec (abfd
)->filepos
= (ztih
977 ? adata (abfd
).exec_bytes_size
978 : adata (abfd
).zmagic_disk_block_size
);
979 if (! obj_textsec (abfd
)->user_set_vma
)
981 /* ?? Do we really need to check for relocs here? */
982 obj_textsec (abfd
)->vma
= ((abfd
->flags
& HAS_RELOC
)
985 ? (abdp
->default_text_vma
986 + adata (abfd
).exec_bytes_size
)
987 : abdp
->default_text_vma
));
992 /* The .text section is being loaded at an unusual address. We
993 may need to pad it such that the .data section starts at a page
996 text_pad
= ((obj_textsec (abfd
)->filepos
- obj_textsec (abfd
)->vma
)
997 & (adata (abfd
).page_size
- 1));
999 text_pad
= ((- obj_textsec (abfd
)->vma
)
1000 & (adata (abfd
).page_size
- 1));
1003 /* Find start of data. */
1006 text_end
= obj_textsec (abfd
)->filepos
+ obj_textsec (abfd
)->size
;
1007 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1011 /* Note that if page_size == zmagic_disk_block_size, then
1012 filepos == page_size, and this case is the same as the ztih
1014 text_end
= obj_textsec (abfd
)->size
;
1015 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1016 text_end
+= obj_textsec (abfd
)->filepos
;
1018 obj_textsec (abfd
)->size
+= text_pad
;
1019 text_end
+= text_pad
;
1022 if (!obj_datasec (abfd
)->user_set_vma
)
1025 vma
= obj_textsec (abfd
)->vma
+ obj_textsec (abfd
)->size
;
1026 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1028 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
1030 asection
* text
= obj_textsec (abfd
);
1031 asection
* data
= obj_datasec (abfd
);
1033 text_pad
= data
->vma
- (text
->vma
+ text
->size
);
1034 /* Only pad the text section if the data
1035 section is going to be placed after it. */
1037 text
->size
+= text_pad
;
1039 obj_datasec (abfd
)->filepos
= (obj_textsec (abfd
)->filepos
1040 + obj_textsec (abfd
)->size
);
1042 /* Fix up exec header while we're at it. */
1043 execp
->a_text
= obj_textsec (abfd
)->size
;
1044 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
1045 execp
->a_text
+= adata (abfd
).exec_bytes_size
;
1046 if (obj_aout_subformat (abfd
) == q_magic_format
)
1047 N_SET_MAGIC (execp
, QMAGIC
);
1049 N_SET_MAGIC (execp
, ZMAGIC
);
1051 /* Spec says data section should be rounded up to page boundary. */
1052 obj_datasec (abfd
)->size
1053 = align_power (obj_datasec (abfd
)->size
,
1054 obj_bsssec (abfd
)->alignment_power
);
1055 execp
->a_data
= BFD_ALIGN (obj_datasec (abfd
)->size
,
1056 adata (abfd
).page_size
);
1057 data_pad
= execp
->a_data
- obj_datasec (abfd
)->size
;
1060 if (!obj_bsssec (abfd
)->user_set_vma
)
1061 obj_bsssec (abfd
)->vma
= (obj_datasec (abfd
)->vma
1062 + obj_datasec (abfd
)->size
);
1063 /* If the BSS immediately follows the data section and extra space
1064 in the page is left after the data section, fudge data
1065 in the header so that the bss section looks smaller by that
1066 amount. We'll start the bss section there, and lie to the OS.
1067 (Note that a linker script, as well as the above assignment,
1068 could have explicitly set the BSS vma to immediately follow
1069 the data section.) */
1070 if (align_power (obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->alignment_power
)
1071 == obj_datasec (abfd
)->vma
+ obj_datasec (abfd
)->size
)
1072 execp
->a_bss
= (data_pad
> obj_bsssec (abfd
)->size
1073 ? 0 : obj_bsssec (abfd
)->size
- data_pad
);
1075 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1079 adjust_n_magic (bfd
*abfd
, struct internal_exec
*execp
)
1081 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1086 obj_textsec (abfd
)->filepos
= pos
;
1087 if (!obj_textsec (abfd
)->user_set_vma
)
1088 obj_textsec (abfd
)->vma
= vma
;
1090 vma
= obj_textsec (abfd
)->vma
;
1091 pos
+= obj_textsec (abfd
)->size
;
1092 vma
+= obj_textsec (abfd
)->size
;
1095 obj_datasec (abfd
)->filepos
= pos
;
1096 if (!obj_datasec (abfd
)->user_set_vma
)
1097 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1098 vma
= obj_datasec (abfd
)->vma
;
1100 /* Since BSS follows data immediately, see if it needs alignment. */
1101 vma
+= obj_datasec (abfd
)->size
;
1102 pad
= align_power (vma
, obj_bsssec (abfd
)->alignment_power
) - vma
;
1103 obj_datasec (abfd
)->size
+= pad
;
1104 pos
+= obj_datasec (abfd
)->size
;
1107 if (!obj_bsssec (abfd
)->user_set_vma
)
1108 obj_bsssec (abfd
)->vma
= vma
;
1110 vma
= obj_bsssec (abfd
)->vma
;
1112 /* Fix up exec header. */
1113 execp
->a_text
= obj_textsec (abfd
)->size
;
1114 execp
->a_data
= obj_datasec (abfd
)->size
;
1115 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1116 N_SET_MAGIC (execp
, NMAGIC
);
1120 NAME (aout
, adjust_sizes_and_vmas
) (bfd
*abfd
)
1122 struct internal_exec
*execp
= exec_hdr (abfd
);
1124 if (! NAME (aout
, make_sections
) (abfd
))
1127 if (adata (abfd
).magic
!= undecided_magic
)
1130 obj_textsec (abfd
)->size
=
1131 align_power (obj_textsec (abfd
)->size
,
1132 obj_textsec (abfd
)->alignment_power
);
1134 /* Rule (heuristic) for when to pad to a new page. Note that there
1135 are (at least) two ways demand-paged (ZMAGIC) files have been
1136 handled. Most Berkeley-based systems start the text segment at
1137 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1138 segment right after the exec header; the latter is counted in the
1139 text segment size, and is paged in by the kernel with the rest of
1142 /* This perhaps isn't the right way to do this, but made it simpler for me
1143 to understand enough to implement it. Better would probably be to go
1144 right from BFD flags to alignment/positioning characteristics. But the
1145 old code was sloppy enough about handling the flags, and had enough
1146 other magic, that it was a little hard for me to understand. I think
1147 I understand it better now, but I haven't time to do the cleanup this
1150 if (abfd
->flags
& D_PAGED
)
1151 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1152 adata (abfd
).magic
= z_magic
;
1153 else if (abfd
->flags
& WP_TEXT
)
1154 adata (abfd
).magic
= n_magic
;
1156 adata (abfd
).magic
= o_magic
;
1158 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1160 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1162 switch (adata (abfd
).magic
)
1164 case n_magic
: str
= "NMAGIC"; break;
1165 case o_magic
: str
= "OMAGIC"; break;
1166 case z_magic
: str
= "ZMAGIC"; break;
1171 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1172 obj_textsec (abfd
)->alignment_power
,
1173 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1174 obj_datasec (abfd
)->alignment_power
,
1175 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
,
1176 obj_bsssec (abfd
)->alignment_power
);
1180 switch (adata (abfd
).magic
)
1183 adjust_o_magic (abfd
, execp
);
1186 adjust_z_magic (abfd
, execp
);
1189 adjust_n_magic (abfd
, execp
);
1195 #ifdef BFD_AOUT_DEBUG
1196 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1197 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1198 obj_textsec (abfd
)->filepos
,
1199 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1200 obj_datasec (abfd
)->filepos
,
1201 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
);
1209 aout_@var{size}_new_section_hook
1212 bfd_boolean aout_@var{size}_new_section_hook,
1217 Called by the BFD in response to a @code{bfd_make_section}
1221 NAME (aout
, new_section_hook
) (bfd
*abfd
, asection
*newsect
)
1223 /* Align to double at least. */
1224 newsect
->alignment_power
= bfd_get_arch_info (abfd
)->section_align_power
;
1226 if (bfd_get_format (abfd
) == bfd_object
)
1228 if (obj_textsec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".text"))
1230 obj_textsec (abfd
)= newsect
;
1231 newsect
->target_index
= N_TEXT
;
1233 else if (obj_datasec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".data"))
1235 obj_datasec (abfd
) = newsect
;
1236 newsect
->target_index
= N_DATA
;
1238 else if (obj_bsssec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".bss"))
1240 obj_bsssec (abfd
) = newsect
;
1241 newsect
->target_index
= N_BSS
;
1245 /* We allow more than three sections internally. */
1246 return _bfd_generic_new_section_hook (abfd
, newsect
);
1250 NAME (aout
, set_section_contents
) (bfd
*abfd
,
1252 const void * location
,
1254 bfd_size_type count
)
1256 if (! abfd
->output_has_begun
)
1258 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
1262 if (section
== obj_bsssec (abfd
))
1264 bfd_set_error (bfd_error_no_contents
);
1268 if (section
!= obj_textsec (abfd
)
1269 && section
!= obj_datasec (abfd
))
1271 if (aout_section_merge_with_text_p (abfd
, section
))
1272 section
->filepos
= obj_textsec (abfd
)->filepos
+
1273 (section
->vma
- obj_textsec (abfd
)->vma
);
1277 /* xgettext:c-format */
1278 (_("%pB: can not represent section `%pA' in a.out object file format"),
1280 bfd_set_error (bfd_error_nonrepresentable_section
);
1287 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1288 || bfd_bwrite (location
, count
, abfd
) != count
)
1295 /* Read the external symbols from an a.out file. */
1298 aout_get_external_symbols (bfd
*abfd
)
1300 if (obj_aout_external_syms (abfd
) == NULL
)
1302 bfd_size_type count
;
1303 struct external_nlist
*syms
;
1304 bfd_size_type amt
= exec_hdr (abfd
)->a_syms
;
1306 count
= amt
/ EXTERNAL_NLIST_SIZE
;
1308 return TRUE
; /* Nothing to do. */
1311 if (! bfd_get_file_window (abfd
, obj_sym_filepos (abfd
), amt
,
1312 &obj_aout_sym_window (abfd
), TRUE
))
1314 syms
= (struct external_nlist
*) obj_aout_sym_window (abfd
).data
;
1316 /* We allocate using malloc to make the values easy to free
1317 later on. If we put them on the objalloc it might not be
1318 possible to free them. */
1319 syms
= (struct external_nlist
*) bfd_malloc (amt
);
1323 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1324 || bfd_bread (syms
, amt
, abfd
) != amt
)
1331 obj_aout_external_syms (abfd
) = syms
;
1332 obj_aout_external_sym_count (abfd
) = count
;
1335 if (obj_aout_external_strings (abfd
) == NULL
1336 && exec_hdr (abfd
)->a_syms
!= 0)
1338 unsigned char string_chars
[BYTES_IN_WORD
];
1339 bfd_size_type stringsize
;
1341 bfd_size_type amt
= BYTES_IN_WORD
;
1343 /* Get the size of the strings. */
1344 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1345 || bfd_bread ((void *) string_chars
, amt
, abfd
) != amt
)
1347 stringsize
= GET_WORD (abfd
, string_chars
);
1348 if (stringsize
== 0)
1350 else if (stringsize
< BYTES_IN_WORD
1351 || (size_t) stringsize
!= stringsize
)
1353 bfd_set_error (bfd_error_bad_value
);
1358 if (stringsize
>= BYTES_IN_WORD
)
1360 if (! bfd_get_file_window (abfd
, obj_str_filepos (abfd
), stringsize
,
1361 &obj_aout_string_window (abfd
), TRUE
))
1363 strings
= (char *) obj_aout_string_window (abfd
).data
;
1368 strings
= (char *) bfd_malloc (stringsize
);
1369 if (strings
== NULL
)
1372 if (stringsize
>= BYTES_IN_WORD
)
1374 /* Keep the string count in the buffer for convenience
1375 when indexing with e_strx. */
1376 amt
= stringsize
- BYTES_IN_WORD
;
1377 if (bfd_bread (strings
+ BYTES_IN_WORD
, amt
, abfd
) != amt
)
1384 /* Ensure that a zero index yields an empty string. */
1387 strings
[stringsize
- 1] = 0;
1389 obj_aout_external_strings (abfd
) = strings
;
1390 obj_aout_external_string_size (abfd
) = stringsize
;
1396 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1397 and symbol->value fields of CACHE_PTR will be set from the a.out
1398 nlist structure. This function is responsible for setting
1399 symbol->flags and symbol->section, and adjusting symbol->value. */
1402 translate_from_native_sym_flags (bfd
*abfd
, aout_symbol_type
*cache_ptr
)
1406 if ((cache_ptr
->type
& N_STAB
) != 0
1407 || cache_ptr
->type
== N_FN
)
1411 /* This is a debugging symbol. */
1412 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1414 /* Work out the symbol section. */
1415 switch (cache_ptr
->type
& N_TYPE
)
1419 sec
= obj_textsec (abfd
);
1422 sec
= obj_datasec (abfd
);
1425 sec
= obj_bsssec (abfd
);
1429 sec
= bfd_abs_section_ptr
;
1433 cache_ptr
->symbol
.section
= sec
;
1434 cache_ptr
->symbol
.value
-= sec
->vma
;
1439 /* Get the default visibility. This does not apply to all types, so
1440 we just hold it in a local variable to use if wanted. */
1441 if ((cache_ptr
->type
& N_EXT
) == 0)
1442 visible
= BSF_LOCAL
;
1444 visible
= BSF_GLOBAL
;
1446 switch (cache_ptr
->type
)
1449 case N_ABS
: case N_ABS
| N_EXT
:
1450 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1451 cache_ptr
->symbol
.flags
= visible
;
1454 case N_UNDF
| N_EXT
:
1455 if (cache_ptr
->symbol
.value
!= 0)
1457 /* This is a common symbol. */
1458 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1459 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1463 cache_ptr
->symbol
.flags
= 0;
1464 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1468 case N_TEXT
: case N_TEXT
| N_EXT
:
1469 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1470 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1471 cache_ptr
->symbol
.flags
= visible
;
1474 /* N_SETV symbols used to represent set vectors placed in the
1475 data section. They are no longer generated. Theoretically,
1476 it was possible to extract the entries and combine them with
1477 new ones, although I don't know if that was ever actually
1478 done. Unless that feature is restored, treat them as data
1480 case N_SETV
: case N_SETV
| N_EXT
:
1481 case N_DATA
: case N_DATA
| N_EXT
:
1482 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1483 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1484 cache_ptr
->symbol
.flags
= visible
;
1487 case N_BSS
: case N_BSS
| N_EXT
:
1488 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1489 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1490 cache_ptr
->symbol
.flags
= visible
;
1493 case N_SETA
: case N_SETA
| N_EXT
:
1494 case N_SETT
: case N_SETT
| N_EXT
:
1495 case N_SETD
: case N_SETD
| N_EXT
:
1496 case N_SETB
: case N_SETB
| N_EXT
:
1498 /* This code is no longer needed. It used to be used to make
1499 the linker handle set symbols, but they are now handled in
1500 the add_symbols routine instead. */
1501 switch (cache_ptr
->type
& N_TYPE
)
1504 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1507 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1510 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1513 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1517 cache_ptr
->symbol
.flags
|= BSF_CONSTRUCTOR
;
1522 /* This symbol is the text of a warning message. The next
1523 symbol is the symbol to associate the warning with. If a
1524 reference is made to that symbol, a warning is issued. */
1525 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_WARNING
;
1526 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1529 case N_INDR
: case N_INDR
| N_EXT
:
1530 /* An indirect symbol. This consists of two symbols in a row.
1531 The first symbol is the name of the indirection. The second
1532 symbol is the name of the target. A reference to the first
1533 symbol becomes a reference to the second. */
1534 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_INDIRECT
| visible
;
1535 cache_ptr
->symbol
.section
= bfd_ind_section_ptr
;
1539 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1540 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1544 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1545 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1549 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1550 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1551 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1555 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1556 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1557 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1561 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1562 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1563 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1570 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1573 translate_to_native_sym_flags (bfd
*abfd
,
1575 struct external_nlist
*sym_pointer
)
1577 bfd_vma value
= cache_ptr
->value
;
1581 /* Mask out any existing type bits in case copying from one section
1583 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1585 sec
= bfd_get_section (cache_ptr
);
1590 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1593 /* xgettext:c-format */
1594 (_("%pB: can not represent section for symbol `%s' in a.out "
1595 "object file format"),
1597 cache_ptr
->name
!= NULL
? cache_ptr
->name
: _("*unknown*"));
1598 bfd_set_error (bfd_error_nonrepresentable_section
);
1602 if (sec
->output_section
!= NULL
)
1604 off
= sec
->output_offset
;
1605 sec
= sec
->output_section
;
1608 if (bfd_is_abs_section (sec
))
1609 sym_pointer
->e_type
[0] |= N_ABS
;
1610 else if (sec
== obj_textsec (abfd
))
1611 sym_pointer
->e_type
[0] |= N_TEXT
;
1612 else if (sec
== obj_datasec (abfd
))
1613 sym_pointer
->e_type
[0] |= N_DATA
;
1614 else if (sec
== obj_bsssec (abfd
))
1615 sym_pointer
->e_type
[0] |= N_BSS
;
1616 else if (bfd_is_und_section (sec
))
1617 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1618 else if (bfd_is_ind_section (sec
))
1619 sym_pointer
->e_type
[0] = N_INDR
;
1620 else if (bfd_is_com_section (sec
))
1621 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1624 if (aout_section_merge_with_text_p (abfd
, sec
))
1625 sym_pointer
->e_type
[0] |= N_TEXT
;
1629 /* xgettext:c-format */
1630 (_("%pB: can not represent section `%pA' in a.out object file format"),
1632 bfd_set_error (bfd_error_nonrepresentable_section
);
1637 /* Turn the symbol from section relative to absolute again. */
1638 value
+= sec
->vma
+ off
;
1640 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1641 sym_pointer
->e_type
[0] = N_WARNING
;
1643 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1644 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1645 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1646 sym_pointer
->e_type
[0] |= N_EXT
;
1647 else if ((cache_ptr
->flags
& BSF_LOCAL
) != 0)
1648 sym_pointer
->e_type
[0] &= ~N_EXT
;
1650 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1652 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1656 case N_ABS
: type
= N_SETA
; break;
1657 case N_TEXT
: type
= N_SETT
; break;
1658 case N_DATA
: type
= N_SETD
; break;
1659 case N_BSS
: type
= N_SETB
; break;
1661 sym_pointer
->e_type
[0] = type
;
1664 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1668 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1671 case N_ABS
: type
= N_WEAKA
; break;
1672 case N_TEXT
: type
= N_WEAKT
; break;
1673 case N_DATA
: type
= N_WEAKD
; break;
1674 case N_BSS
: type
= N_WEAKB
; break;
1675 case N_UNDF
: type
= N_WEAKU
; break;
1677 sym_pointer
->e_type
[0] = type
;
1680 PUT_WORD (abfd
, value
, sym_pointer
->e_value
);
1685 /* Native-level interface to symbols. */
1688 NAME (aout
, make_empty_symbol
) (bfd
*abfd
)
1690 bfd_size_type amt
= sizeof (aout_symbol_type
);
1692 aout_symbol_type
*new_symbol
= (aout_symbol_type
*) bfd_zalloc (abfd
, amt
);
1695 new_symbol
->symbol
.the_bfd
= abfd
;
1697 return &new_symbol
->symbol
;
1700 /* Translate a set of internal symbols into external symbols. */
1703 NAME (aout
, translate_symbol_table
) (bfd
*abfd
,
1704 aout_symbol_type
*in
,
1705 struct external_nlist
*ext
,
1706 bfd_size_type count
,
1708 bfd_size_type strsize
,
1709 bfd_boolean dynamic
)
1711 struct external_nlist
*ext_end
;
1713 ext_end
= ext
+ count
;
1714 for (; ext
< ext_end
; ext
++, in
++)
1718 x
= GET_WORD (abfd
, ext
->e_strx
);
1719 in
->symbol
.the_bfd
= abfd
;
1721 /* For the normal symbols, the zero index points at the number
1722 of bytes in the string table but is to be interpreted as the
1723 null string. For the dynamic symbols, the number of bytes in
1724 the string table is stored in the __DYNAMIC structure and the
1725 zero index points at an actual string. */
1726 if (x
== 0 && ! dynamic
)
1727 in
->symbol
.name
= "";
1728 else if (x
< strsize
)
1729 in
->symbol
.name
= str
+ x
;
1733 (_("%pB: invalid string offset %" PRIu64
" >= %" PRIu64
),
1734 abfd
, (uint64_t) x
, (uint64_t) strsize
);
1735 bfd_set_error (bfd_error_bad_value
);
1739 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1740 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1741 in
->other
= H_GET_8 (abfd
, ext
->e_other
);
1742 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1743 in
->symbol
.udata
.p
= NULL
;
1745 if (! translate_from_native_sym_flags (abfd
, in
))
1749 in
->symbol
.flags
|= BSF_DYNAMIC
;
1755 /* We read the symbols into a buffer, which is discarded when this
1756 function exits. We read the strings into a buffer large enough to
1757 hold them all plus all the cached symbol entries. */
1760 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1762 struct external_nlist
*old_external_syms
;
1763 aout_symbol_type
*cached
;
1764 bfd_size_type cached_size
;
1766 /* If there's no work to be done, don't do any. */
1767 if (obj_aout_symbols (abfd
) != NULL
)
1770 old_external_syms
= obj_aout_external_syms (abfd
);
1772 if (! aout_get_external_symbols (abfd
))
1775 cached_size
= obj_aout_external_sym_count (abfd
);
1776 if (cached_size
== 0)
1777 return TRUE
; /* Nothing to do. */
1779 cached_size
*= sizeof (aout_symbol_type
);
1780 cached
= (aout_symbol_type
*) bfd_zmalloc (cached_size
);
1784 /* Convert from external symbol information to internal. */
1785 if (! (NAME (aout
, translate_symbol_table
)
1787 obj_aout_external_syms (abfd
),
1788 obj_aout_external_sym_count (abfd
),
1789 obj_aout_external_strings (abfd
),
1790 obj_aout_external_string_size (abfd
),
1797 bfd_get_symcount (abfd
) = obj_aout_external_sym_count (abfd
);
1799 obj_aout_symbols (abfd
) = cached
;
1801 /* It is very likely that anybody who calls this function will not
1802 want the external symbol information, so if it was allocated
1803 because of our call to aout_get_external_symbols, we free it up
1804 right away to save space. */
1805 if (old_external_syms
== NULL
1806 && obj_aout_external_syms (abfd
) != NULL
)
1809 bfd_free_window (&obj_aout_sym_window (abfd
));
1811 free (obj_aout_external_syms (abfd
));
1813 obj_aout_external_syms (abfd
) = NULL
;
1819 /* We use a hash table when writing out symbols so that we only write
1820 out a particular string once. This helps particularly when the
1821 linker writes out stabs debugging entries, because each different
1822 contributing object file tends to have many duplicate stabs
1825 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1826 if BFD_TRADITIONAL_FORMAT is set. */
1828 /* Get the index of a string in a strtab, adding it if it is not
1831 static inline bfd_size_type
1832 add_to_stringtab (bfd
*abfd
,
1833 struct bfd_strtab_hash
*tab
,
1838 bfd_size_type str_index
;
1840 /* An index of 0 always means the empty string. */
1841 if (str
== 0 || *str
== '\0')
1844 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1845 doesn't understand a hashed string table. */
1847 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1850 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1852 if (str_index
!= (bfd_size_type
) -1)
1853 /* Add BYTES_IN_WORD to the return value to account for the
1854 space taken up by the string table size. */
1855 str_index
+= BYTES_IN_WORD
;
1860 /* Write out a strtab. ABFD is already at the right location in the
1864 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1866 bfd_byte buffer
[BYTES_IN_WORD
];
1867 bfd_size_type amt
= BYTES_IN_WORD
;
1869 /* The string table starts with the size. */
1870 PUT_WORD (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_WORD
, buffer
);
1871 if (bfd_bwrite ((void *) buffer
, amt
, abfd
) != amt
)
1874 return _bfd_stringtab_emit (abfd
, tab
);
1878 NAME (aout
, write_syms
) (bfd
*abfd
)
1880 unsigned int count
;
1881 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1882 struct bfd_strtab_hash
*strtab
;
1884 strtab
= _bfd_stringtab_init ();
1888 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1890 asymbol
*g
= generic
[count
];
1892 struct external_nlist nsp
;
1895 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, FALSE
);
1896 if (indx
== (bfd_size_type
) -1)
1898 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1900 if (bfd_asymbol_flavour (g
) == abfd
->xvec
->flavour
)
1902 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1903 H_PUT_8 (abfd
, aout_symbol (g
)->other
, nsp
.e_other
);
1904 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1908 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1909 H_PUT_8 (abfd
, 0, nsp
.e_other
);
1910 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1913 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1916 amt
= EXTERNAL_NLIST_SIZE
;
1917 if (bfd_bwrite ((void *) &nsp
, amt
, abfd
) != amt
)
1920 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1921 here, at the end. */
1925 if (! emit_stringtab (abfd
, strtab
))
1928 _bfd_stringtab_free (strtab
);
1933 _bfd_stringtab_free (strtab
);
1938 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1940 unsigned int counter
= 0;
1941 aout_symbol_type
*symbase
;
1943 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1946 for (symbase
= obj_aout_symbols (abfd
);
1947 counter
++ < bfd_get_symcount (abfd
);
1949 *(location
++) = (asymbol
*) (symbase
++);
1951 return bfd_get_symcount (abfd
);
1954 /* Standard reloc stuff. */
1955 /* Output standard relocation information to a file in target byte order. */
1957 extern void NAME (aout
, swap_std_reloc_out
)
1958 (bfd
*, arelent
*, struct reloc_std_external
*);
1961 NAME (aout
, swap_std_reloc_out
) (bfd
*abfd
,
1963 struct reloc_std_external
*natptr
)
1966 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1968 unsigned int r_length
;
1970 int r_baserel
, r_jmptable
, r_relative
;
1971 asection
*output_section
= sym
->section
->output_section
;
1973 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
1975 BFD_ASSERT (g
->howto
!= NULL
);
1976 r_length
= g
->howto
->size
; /* Size as a power of two. */
1977 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1978 /* XXX This relies on relocs coming from a.out files. */
1979 r_baserel
= (g
->howto
->type
& 8) != 0;
1980 r_jmptable
= (g
->howto
->type
& 16) != 0;
1981 r_relative
= (g
->howto
->type
& 32) != 0;
1983 /* Name was clobbered by aout_write_syms to be symbol index. */
1985 /* If this relocation is relative to a symbol then set the
1986 r_index to the symbols index, and the r_extern bit.
1988 Absolute symbols can come in in two ways, either as an offset
1989 from the abs section, or as a symbol which has an abs value.
1990 check for that here. */
1992 if (bfd_is_com_section (output_section
)
1993 || bfd_is_abs_section (output_section
)
1994 || bfd_is_und_section (output_section
)
1995 /* PR gas/3041 a.out relocs against weak symbols
1996 must be treated as if they were against externs. */
1997 || (sym
->flags
& BSF_WEAK
))
1999 if (bfd_abs_section_ptr
->symbol
== sym
)
2001 /* Whoops, looked like an abs symbol, but is
2002 really an offset from the abs section. */
2008 /* Fill in symbol. */
2010 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2015 /* Just an ordinary section. */
2017 r_index
= output_section
->target_index
;
2020 /* Now the fun stuff. */
2021 if (bfd_header_big_endian (abfd
))
2023 natptr
->r_index
[0] = r_index
>> 16;
2024 natptr
->r_index
[1] = r_index
>> 8;
2025 natptr
->r_index
[2] = r_index
;
2026 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2027 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2028 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2029 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2030 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2031 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
2035 natptr
->r_index
[2] = r_index
>> 16;
2036 natptr
->r_index
[1] = r_index
>> 8;
2037 natptr
->r_index
[0] = r_index
;
2038 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2039 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2040 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2041 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2042 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2043 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
2047 /* Extended stuff. */
2048 /* Output extended relocation information to a file in target byte order. */
2050 extern void NAME (aout
, swap_ext_reloc_out
)
2051 (bfd
*, arelent
*, struct reloc_ext_external
*);
2054 NAME (aout
, swap_ext_reloc_out
) (bfd
*abfd
,
2056 struct reloc_ext_external
*natptr
)
2060 unsigned int r_type
;
2062 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2063 asection
*output_section
= sym
->section
->output_section
;
2065 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2067 r_type
= (unsigned int) g
->howto
->type
;
2069 r_addend
= g
->addend
;
2070 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2071 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2073 /* If this relocation is relative to a symbol then set the
2074 r_index to the symbols index, and the r_extern bit.
2076 Absolute symbols can come in in two ways, either as an offset
2077 from the abs section, or as a symbol which has an abs value.
2078 check for that here. */
2079 if (bfd_is_abs_section (bfd_get_section (sym
)))
2084 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2086 if (bfd_is_und_section (bfd_get_section (sym
))
2087 || (sym
->flags
& BSF_GLOBAL
) != 0)
2091 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2095 /* Just an ordinary section. */
2097 r_index
= output_section
->target_index
;
2100 /* Now the fun stuff. */
2101 if (bfd_header_big_endian (abfd
))
2103 natptr
->r_index
[0] = r_index
>> 16;
2104 natptr
->r_index
[1] = r_index
>> 8;
2105 natptr
->r_index
[2] = r_index
;
2106 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2107 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2111 natptr
->r_index
[2] = r_index
>> 16;
2112 natptr
->r_index
[1] = r_index
>> 8;
2113 natptr
->r_index
[0] = r_index
;
2114 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2115 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
));
2118 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2121 /* BFD deals internally with all things based from the section they're
2122 in. so, something in 10 bytes into a text section with a base of
2123 50 would have a symbol (.text+10) and know .text vma was 50.
2125 Aout keeps all it's symbols based from zero, so the symbol would
2126 contain 60. This macro subs the base of each section from the value
2127 to give the true offset from the section. */
2129 #define MOVE_ADDRESS(ad) \
2132 /* Undefined symbol. */ \
2133 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2134 cache_ptr->addend = ad; \
2138 /* Defined, section relative. Replace symbol with pointer to \
2139 symbol which points to section. */ \
2143 case N_TEXT | N_EXT: \
2144 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2145 cache_ptr->addend = ad - su->textsec->vma; \
2148 case N_DATA | N_EXT: \
2149 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2150 cache_ptr->addend = ad - su->datasec->vma; \
2153 case N_BSS | N_EXT: \
2154 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2155 cache_ptr->addend = ad - su->bsssec->vma; \
2159 case N_ABS | N_EXT: \
2160 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2161 cache_ptr->addend = ad; \
2167 NAME (aout
, swap_ext_reloc_in
) (bfd
*abfd
,
2168 struct reloc_ext_external
*bytes
,
2171 bfd_size_type symcount
)
2173 unsigned int r_index
;
2175 unsigned int r_type
;
2176 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2178 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2180 /* Now the fun stuff. */
2181 if (bfd_header_big_endian (abfd
))
2183 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2184 | ((unsigned int) bytes
->r_index
[1] << 8)
2185 | bytes
->r_index
[2]);
2186 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2187 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2188 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
2192 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2193 | ((unsigned int) bytes
->r_index
[1] << 8)
2194 | bytes
->r_index
[0]);
2195 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2196 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2197 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2200 if (r_type
< TABLE_SIZE (howto_table_ext
))
2201 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2203 cache_ptr
->howto
= NULL
;
2205 /* Base relative relocs are always against the symbol table,
2206 regardless of the setting of r_extern. r_extern just reflects
2207 whether the symbol the reloc is against is local or global. */
2208 if (r_type
== (unsigned int) RELOC_BASE10
2209 || r_type
== (unsigned int) RELOC_BASE13
2210 || r_type
== (unsigned int) RELOC_BASE22
)
2213 if (r_extern
&& r_index
> symcount
)
2215 /* We could arrange to return an error, but it might be useful
2216 to see the file even if it is bad. */
2221 MOVE_ADDRESS (GET_SWORD (abfd
, bytes
->r_addend
));
2225 NAME (aout
, swap_std_reloc_in
) (bfd
*abfd
,
2226 struct reloc_std_external
*bytes
,
2229 bfd_size_type symcount
)
2231 unsigned int r_index
;
2233 unsigned int r_length
;
2235 int r_baserel
, r_jmptable
, r_relative
;
2236 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2237 unsigned int howto_idx
;
2239 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
2241 /* Now the fun stuff. */
2242 if (bfd_header_big_endian (abfd
))
2244 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2245 | ((unsigned int) bytes
->r_index
[1] << 8)
2246 | bytes
->r_index
[2]);
2247 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2248 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2249 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2250 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2251 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2252 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2253 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
2257 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2258 | ((unsigned int) bytes
->r_index
[1] << 8)
2259 | bytes
->r_index
[0]);
2260 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2261 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2262 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2263 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2264 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2265 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2266 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2269 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2270 + 16 * r_jmptable
+ 32 * r_relative
);
2271 if (howto_idx
< TABLE_SIZE (howto_table_std
))
2273 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2274 if (cache_ptr
->howto
->type
== (unsigned int) -1)
2275 cache_ptr
->howto
= NULL
;
2278 cache_ptr
->howto
= NULL
;
2280 /* Base relative relocs are always against the symbol table,
2281 regardless of the setting of r_extern. r_extern just reflects
2282 whether the symbol the reloc is against is local or global. */
2286 if (r_extern
&& r_index
>= symcount
)
2288 /* We could arrange to return an error, but it might be useful
2289 to see the file even if it is bad. FIXME: Of course this
2290 means that objdump -r *doesn't* see the actual reloc, and
2291 objcopy silently writes a different reloc. */
2299 /* Read and swap the relocs for a section. */
2302 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
2304 bfd_size_type count
;
2305 bfd_size_type reloc_size
;
2307 arelent
*reloc_cache
;
2309 unsigned int counter
= 0;
2313 if (asect
->relocation
)
2316 if (asect
->flags
& SEC_CONSTRUCTOR
)
2319 if (asect
== obj_datasec (abfd
))
2320 reloc_size
= exec_hdr (abfd
)->a_drsize
;
2321 else if (asect
== obj_textsec (abfd
))
2322 reloc_size
= exec_hdr (abfd
)->a_trsize
;
2323 else if (asect
== obj_bsssec (abfd
))
2327 bfd_set_error (bfd_error_invalid_operation
);
2331 if (reloc_size
== 0)
2332 return TRUE
; /* Nothing to be done. */
2334 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2337 each_size
= obj_reloc_entry_size (abfd
);
2339 count
= reloc_size
/ each_size
;
2341 return TRUE
; /* Nothing to be done. */
2343 amt
= count
* sizeof (arelent
);
2344 reloc_cache
= (arelent
*) bfd_zmalloc (amt
);
2345 if (reloc_cache
== NULL
)
2348 relocs
= bfd_malloc (reloc_size
);
2355 if (bfd_bread (relocs
, reloc_size
, abfd
) != reloc_size
)
2362 cache_ptr
= reloc_cache
;
2363 if (each_size
== RELOC_EXT_SIZE
)
2365 struct reloc_ext_external
*rptr
= (struct reloc_ext_external
*) relocs
;
2367 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2368 MY_swap_ext_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2369 (bfd_size_type
) bfd_get_symcount (abfd
));
2373 struct reloc_std_external
*rptr
= (struct reloc_std_external
*) relocs
;
2375 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2376 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2377 (bfd_size_type
) bfd_get_symcount (abfd
));
2382 asect
->relocation
= reloc_cache
;
2383 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2388 /* Write out a relocation section into an object file. */
2391 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2394 unsigned char *native
, *natptr
;
2397 unsigned int count
= section
->reloc_count
;
2398 bfd_size_type natsize
;
2400 if (count
== 0 || section
->orelocation
== NULL
)
2403 each_size
= obj_reloc_entry_size (abfd
);
2404 natsize
= (bfd_size_type
) each_size
* count
;
2405 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2409 generic
= section
->orelocation
;
2411 if (each_size
== RELOC_EXT_SIZE
)
2413 for (natptr
= native
;
2415 --count
, natptr
+= each_size
, ++generic
)
2417 /* PR 20921: If the howto field has not been initialised then skip
2419 PR 20929: Similarly for the symbol field. */
2420 if ((*generic
)->howto
== NULL
2421 || (*generic
)->sym_ptr_ptr
== NULL
)
2423 bfd_set_error (bfd_error_invalid_operation
);
2424 _bfd_error_handler (_("\
2425 %pB: attempt to write out unknown reloc type"), abfd
);
2428 MY_swap_ext_reloc_out (abfd
, *generic
,
2429 (struct reloc_ext_external
*) natptr
);
2434 for (natptr
= native
;
2436 --count
, natptr
+= each_size
, ++generic
)
2438 if ((*generic
)->howto
== NULL
2439 || (*generic
)->sym_ptr_ptr
== NULL
)
2441 bfd_set_error (bfd_error_invalid_operation
);
2442 _bfd_error_handler (_("\
2443 %pB: attempt to write out unknown reloc type"), abfd
);
2446 MY_swap_std_reloc_out (abfd
, *generic
,
2447 (struct reloc_std_external
*) natptr
);
2451 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2453 bfd_release (abfd
, native
);
2456 bfd_release (abfd
, native
);
2461 /* This is stupid. This function should be a boolean predicate. */
2464 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2469 arelent
*tblptr
= section
->relocation
;
2472 if (section
== obj_bsssec (abfd
))
2478 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
) (abfd
, section
, symbols
)))
2481 if (section
->flags
& SEC_CONSTRUCTOR
)
2483 arelent_chain
*chain
= section
->constructor_chain
;
2484 for (count
= 0; count
< section
->reloc_count
; count
++)
2486 *relptr
++ = &chain
->relent
;
2487 chain
= chain
->next
;
2492 tblptr
= section
->relocation
;
2494 for (count
= 0; count
++ < section
->reloc_count
; )
2496 *relptr
++ = tblptr
++;
2501 return section
->reloc_count
;
2505 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2507 if (bfd_get_format (abfd
) != bfd_object
)
2509 bfd_set_error (bfd_error_invalid_operation
);
2513 if (asect
->flags
& SEC_CONSTRUCTOR
)
2514 return sizeof (arelent
*) * (asect
->reloc_count
+ 1);
2516 if (asect
== obj_datasec (abfd
))
2517 return sizeof (arelent
*)
2518 * ((exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
))
2521 if (asect
== obj_textsec (abfd
))
2522 return sizeof (arelent
*)
2523 * ((exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
))
2526 if (asect
== obj_bsssec (abfd
))
2527 return sizeof (arelent
*);
2529 if (asect
== obj_bsssec (abfd
))
2532 bfd_set_error (bfd_error_invalid_operation
);
2537 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2539 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2542 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2546 NAME (aout
, get_lineno
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2547 asymbol
*ignore_symbol ATTRIBUTE_UNUSED
)
2553 NAME (aout
, get_symbol_info
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2557 bfd_symbol_info (symbol
, ret
);
2559 if (ret
->type
== '?')
2561 int type_code
= aout_symbol (symbol
)->type
& 0xff;
2562 const char *stab_name
= bfd_get_stab_name (type_code
);
2563 static char buf
[10];
2565 if (stab_name
== NULL
)
2567 sprintf (buf
, "(%d)", type_code
);
2571 ret
->stab_type
= type_code
;
2572 ret
->stab_other
= (unsigned) (aout_symbol (symbol
)->other
& 0xff);
2573 ret
->stab_desc
= (unsigned) (aout_symbol (symbol
)->desc
& 0xffff);
2574 ret
->stab_name
= stab_name
;
2579 NAME (aout
, print_symbol
) (bfd
*abfd
,
2582 bfd_print_symbol_type how
)
2584 FILE *file
= (FILE *)afile
;
2588 case bfd_print_symbol_name
:
2590 fprintf (file
,"%s", symbol
->name
);
2592 case bfd_print_symbol_more
:
2593 fprintf (file
,"%4x %2x %2x",
2594 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2595 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2596 (unsigned) (aout_symbol (symbol
)->type
));
2598 case bfd_print_symbol_all
:
2600 const char *section_name
= symbol
->section
->name
;
2602 bfd_print_symbol_vandf (abfd
, (void *)file
, symbol
);
2604 fprintf (file
," %-5s %04x %02x %02x",
2606 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2607 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2608 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2610 fprintf (file
," %s", symbol
->name
);
2616 /* If we don't have to allocate more than 1MB to hold the generic
2617 symbols, we use the generic minisymbol methord: it's faster, since
2618 it only translates the symbols once, not multiple times. */
2619 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2621 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2622 symbols. The minisymbol_to_symbol function translates these into
2623 BFD asymbol structures. */
2626 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2627 bfd_boolean dynamic
,
2629 unsigned int *sizep
)
2632 /* We could handle the dynamic symbols here as well, but it's
2633 easier to hand them off. */
2634 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2636 if (! aout_get_external_symbols (abfd
))
2639 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2640 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2642 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2644 /* By passing the external symbols back from this routine, we are
2645 giving up control over the memory block. Clear
2646 obj_aout_external_syms, so that we do not try to free it
2648 obj_aout_external_syms (abfd
) = NULL
;
2650 *sizep
= EXTERNAL_NLIST_SIZE
;
2651 return obj_aout_external_sym_count (abfd
);
2654 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2655 unmodified a.out symbol. The SYM argument is a structure returned
2656 by bfd_make_empty_symbol, which we fill in here. */
2659 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2660 bfd_boolean dynamic
,
2661 const void * minisym
,
2665 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2666 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2668 memset (sym
, 0, sizeof (aout_symbol_type
));
2670 /* We call translate_symbol_table to translate a single symbol. */
2671 if (! (NAME (aout
, translate_symbol_table
)
2673 (aout_symbol_type
*) sym
,
2674 (struct external_nlist
*) minisym
,
2676 obj_aout_external_strings (abfd
),
2677 obj_aout_external_string_size (abfd
),
2684 /* Provided a BFD, a section and an offset into the section, calculate
2685 and return the name of the source file and the line nearest to the
2689 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2693 const char **filename_ptr
,
2694 const char **functionname_ptr
,
2695 unsigned int *line_ptr
,
2696 unsigned int *disriminator_ptr
)
2698 /* Run down the file looking for the filename, function and linenumber. */
2700 const char *directory_name
= NULL
;
2701 const char *main_file_name
= NULL
;
2702 const char *current_file_name
= NULL
;
2703 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2704 const char *line_directory_name
= NULL
; /* Value of directory_name at line number. */
2705 bfd_vma low_line_vma
= 0;
2706 bfd_vma low_func_vma
= 0;
2708 bfd_size_type filelen
, funclen
;
2711 *filename_ptr
= abfd
->filename
;
2712 *functionname_ptr
= NULL
;
2714 if (disriminator_ptr
)
2715 *disriminator_ptr
= 0;
2717 if (symbols
!= NULL
)
2719 for (p
= symbols
; *p
; p
++)
2721 aout_symbol_type
*q
= (aout_symbol_type
*) (*p
);
2726 /* If this looks like a file name symbol, and it comes after
2727 the line number we have found so far, but before the
2728 offset, then we have probably not found the right line
2730 if (q
->symbol
.value
<= offset
2731 && ((q
->symbol
.value
> low_line_vma
2732 && (line_file_name
!= NULL
2734 || (q
->symbol
.value
> low_func_vma
2737 const char *symname
;
2739 symname
= q
->symbol
.name
;
2740 if (strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2742 if (q
->symbol
.value
> low_line_vma
)
2745 line_file_name
= NULL
;
2747 if (q
->symbol
.value
> low_func_vma
)
2754 /* If this symbol is less than the offset, but greater than
2755 the line number we have found so far, then we have not
2756 found the right line number. */
2757 if (q
->symbol
.value
<= offset
)
2759 if (q
->symbol
.value
> low_line_vma
)
2762 line_file_name
= NULL
;
2764 if (q
->symbol
.value
> low_func_vma
)
2768 main_file_name
= current_file_name
= q
->symbol
.name
;
2769 /* Look ahead to next symbol to check if that too is an N_SO. */
2773 q
= (aout_symbol_type
*) (*p
);
2774 if (q
->type
!= (int)N_SO
)
2777 /* Found a second N_SO First is directory; second is filename. */
2778 directory_name
= current_file_name
;
2779 main_file_name
= current_file_name
= q
->symbol
.name
;
2780 if (obj_textsec (abfd
) != section
)
2784 current_file_name
= q
->symbol
.name
;
2791 /* We'll keep this if it resolves nearer than the one we have
2793 if (q
->symbol
.value
>= low_line_vma
2794 && q
->symbol
.value
<= offset
)
2796 *line_ptr
= q
->desc
;
2797 low_line_vma
= q
->symbol
.value
;
2798 line_file_name
= current_file_name
;
2799 line_directory_name
= directory_name
;
2804 /* We'll keep this if it is nearer than the one we have already. */
2805 if (q
->symbol
.value
>= low_func_vma
&&
2806 q
->symbol
.value
<= offset
)
2808 low_func_vma
= q
->symbol
.value
;
2809 func
= (asymbol
*)q
;
2811 else if (q
->symbol
.value
> offset
)
2822 main_file_name
= line_file_name
;
2823 directory_name
= line_directory_name
;
2826 if (main_file_name
== NULL
2827 || IS_ABSOLUTE_PATH (main_file_name
)
2828 || directory_name
== NULL
)
2831 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2836 funclen
= strlen (bfd_asymbol_name (func
));
2838 if (adata (abfd
).line_buf
!= NULL
)
2839 free (adata (abfd
).line_buf
);
2841 if (filelen
+ funclen
== 0)
2842 adata (abfd
).line_buf
= buf
= NULL
;
2845 buf
= (char *) bfd_malloc (filelen
+ funclen
+ 3);
2846 adata (abfd
).line_buf
= buf
;
2851 if (main_file_name
!= NULL
)
2853 if (IS_ABSOLUTE_PATH (main_file_name
) || directory_name
== NULL
)
2854 *filename_ptr
= main_file_name
;
2858 /* PR binutils/20891: In a corrupt input file both
2859 main_file_name and directory_name can be empty... */
2860 * filename_ptr
= NULL
;
2863 snprintf (buf
, filelen
+ 1, "%s%s", directory_name
,
2865 *filename_ptr
= buf
;
2873 const char *function
= func
->name
;
2878 /* PR binutils/20892: In a corrupt input file func can be empty. */
2879 * functionname_ptr
= NULL
;
2882 /* The caller expects a symbol name. We actually have a
2883 function name, without the leading underscore. Put the
2884 underscore back in, so that the caller gets a symbol name. */
2885 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2886 strcpy (buf
, function
);
2889 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2890 strcpy (buf
+ 1, function
);
2892 /* Have to remove : stuff. */
2893 colon
= strchr (buf
, ':');
2896 *functionname_ptr
= buf
;
2903 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2904 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2906 return adata (abfd
).exec_bytes_size
;
2909 /* Free all information we have cached for this BFD. We can always
2910 read it again later if we need it. */
2913 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2917 if (bfd_get_format (abfd
) != bfd_object
2918 || abfd
->tdata
.aout_data
== NULL
)
2921 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2922 BFCI_FREE (obj_aout_symbols (abfd
));
2924 obj_aout_external_syms (abfd
) = 0;
2925 bfd_free_window (&obj_aout_sym_window (abfd
));
2926 bfd_free_window (&obj_aout_string_window (abfd
));
2927 obj_aout_external_strings (abfd
) = 0;
2929 BFCI_FREE (obj_aout_external_syms (abfd
));
2930 BFCI_FREE (obj_aout_external_strings (abfd
));
2932 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2933 BFCI_FREE (o
->relocation
);
2939 /* a.out link code. */
2941 /* Routine to create an entry in an a.out link hash table. */
2943 struct bfd_hash_entry
*
2944 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2945 struct bfd_hash_table
*table
,
2948 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2950 /* Allocate the structure if it has not already been allocated by a
2953 ret
= (struct aout_link_hash_entry
*) bfd_hash_allocate (table
,
2958 /* Call the allocation method of the superclass. */
2959 ret
= ((struct aout_link_hash_entry
*)
2960 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2964 /* Set local fields. */
2965 ret
->written
= FALSE
;
2969 return (struct bfd_hash_entry
*) ret
;
2972 /* Initialize an a.out link hash table. */
2975 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2977 struct bfd_hash_entry
*(*newfunc
)
2978 (struct bfd_hash_entry
*, struct bfd_hash_table
*,
2980 unsigned int entsize
)
2982 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2985 /* Create an a.out link hash table. */
2987 struct bfd_link_hash_table
*
2988 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2990 struct aout_link_hash_table
*ret
;
2991 bfd_size_type amt
= sizeof (* ret
);
2993 ret
= (struct aout_link_hash_table
*) bfd_malloc (amt
);
2997 if (!NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2998 NAME (aout
, link_hash_newfunc
),
2999 sizeof (struct aout_link_hash_entry
)))
3007 /* Add all symbols from an object file to the hash table. */
3010 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3012 bfd_boolean (*add_one_symbol
)
3013 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
3014 bfd_vma
, const char *, bfd_boolean
, bfd_boolean
,
3015 struct bfd_link_hash_entry
**);
3016 struct external_nlist
*syms
;
3017 bfd_size_type sym_count
;
3020 struct aout_link_hash_entry
**sym_hash
;
3021 struct external_nlist
*p
;
3022 struct external_nlist
*pend
;
3025 syms
= obj_aout_external_syms (abfd
);
3026 sym_count
= obj_aout_external_sym_count (abfd
);
3027 strings
= obj_aout_external_strings (abfd
);
3028 if (info
->keep_memory
)
3033 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
3035 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
3036 (abfd
, info
, &syms
, &sym_count
, &strings
)))
3041 return TRUE
; /* Nothing to do. */
3043 /* We keep a list of the linker hash table entries that correspond
3044 to particular symbols. We could just look them up in the hash
3045 table, but keeping the list is more efficient. Perhaps this
3046 should be conditional on info->keep_memory. */
3047 amt
= sym_count
* sizeof (struct aout_link_hash_entry
*);
3048 sym_hash
= (struct aout_link_hash_entry
**) bfd_alloc (abfd
, amt
);
3049 if (sym_hash
== NULL
)
3051 obj_aout_sym_hashes (abfd
) = sym_hash
;
3053 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
3054 if (add_one_symbol
== NULL
)
3055 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
3058 pend
= p
+ sym_count
;
3059 for (; p
< pend
; p
++, sym_hash
++)
3070 type
= H_GET_8 (abfd
, p
->e_type
);
3072 /* Ignore debugging symbols. */
3073 if ((type
& N_STAB
) != 0)
3076 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3077 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3079 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3080 value
= GET_WORD (abfd
, p
->e_value
);
3097 /* Ignore symbols that are not externally visible. */
3100 /* Ignore local indirect symbol. */
3105 case N_UNDF
| N_EXT
:
3108 section
= bfd_und_section_ptr
;
3112 section
= bfd_com_section_ptr
;
3115 section
= bfd_abs_section_ptr
;
3117 case N_TEXT
| N_EXT
:
3118 section
= obj_textsec (abfd
);
3119 value
-= bfd_get_section_vma (abfd
, section
);
3121 case N_DATA
| N_EXT
:
3122 case N_SETV
| N_EXT
:
3123 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3124 translate_from_native_sym_flags. */
3125 section
= obj_datasec (abfd
);
3126 value
-= bfd_get_section_vma (abfd
, section
);
3129 section
= obj_bsssec (abfd
);
3130 value
-= bfd_get_section_vma (abfd
, section
);
3132 case N_INDR
| N_EXT
:
3133 /* An indirect symbol. The next symbol is the symbol
3134 which this one really is. */
3135 /* See PR 20925 for a reproducer. */
3139 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3140 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3142 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3143 section
= bfd_ind_section_ptr
;
3144 flags
|= BSF_INDIRECT
;
3146 case N_COMM
| N_EXT
:
3147 section
= bfd_com_section_ptr
;
3149 case N_SETA
: case N_SETA
| N_EXT
:
3150 section
= bfd_abs_section_ptr
;
3151 flags
|= BSF_CONSTRUCTOR
;
3153 case N_SETT
: case N_SETT
| N_EXT
:
3154 section
= obj_textsec (abfd
);
3155 flags
|= BSF_CONSTRUCTOR
;
3156 value
-= bfd_get_section_vma (abfd
, section
);
3158 case N_SETD
: case N_SETD
| N_EXT
:
3159 section
= obj_datasec (abfd
);
3160 flags
|= BSF_CONSTRUCTOR
;
3161 value
-= bfd_get_section_vma (abfd
, section
);
3163 case N_SETB
: case N_SETB
| N_EXT
:
3164 section
= obj_bsssec (abfd
);
3165 flags
|= BSF_CONSTRUCTOR
;
3166 value
-= bfd_get_section_vma (abfd
, section
);
3169 /* A warning symbol. The next symbol is the one to warn
3170 about. If there is no next symbol, just look away. */
3175 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3176 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3178 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3179 section
= bfd_und_section_ptr
;
3180 flags
|= BSF_WARNING
;
3183 section
= bfd_und_section_ptr
;
3187 section
= bfd_abs_section_ptr
;
3191 section
= obj_textsec (abfd
);
3192 value
-= bfd_get_section_vma (abfd
, section
);
3196 section
= obj_datasec (abfd
);
3197 value
-= bfd_get_section_vma (abfd
, section
);
3201 section
= obj_bsssec (abfd
);
3202 value
-= bfd_get_section_vma (abfd
, section
);
3207 if (! ((*add_one_symbol
)
3208 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, FALSE
,
3209 (struct bfd_link_hash_entry
**) sym_hash
)))
3212 /* Restrict the maximum alignment of a common symbol based on
3213 the architecture, since a.out has no way to represent
3214 alignment requirements of a section in a .o file. FIXME:
3215 This isn't quite right: it should use the architecture of the
3216 output file, not the input files. */
3217 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3218 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3219 bfd_get_arch_info (abfd
)->section_align_power
))
3220 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3221 bfd_get_arch_info (abfd
)->section_align_power
;
3223 /* If this is a set symbol, and we are not building sets, then
3224 it is possible for the hash entry to not have been set. In
3225 such a case, treat the symbol as not globally defined. */
3226 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3228 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3232 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3239 /* Free up the internal symbols read from an a.out file. */
3242 aout_link_free_symbols (bfd
*abfd
)
3244 if (obj_aout_external_syms (abfd
) != NULL
)
3247 bfd_free_window (&obj_aout_sym_window (abfd
));
3249 free ((void *) obj_aout_external_syms (abfd
));
3251 obj_aout_external_syms (abfd
) = NULL
;
3253 if (obj_aout_external_strings (abfd
) != NULL
)
3256 bfd_free_window (&obj_aout_string_window (abfd
));
3258 free ((void *) obj_aout_external_strings (abfd
));
3260 obj_aout_external_strings (abfd
) = NULL
;
3265 /* Add symbols from an a.out object file. */
3268 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3270 if (! aout_get_external_symbols (abfd
))
3272 if (! aout_link_add_symbols (abfd
, info
))
3274 if (! info
->keep_memory
)
3276 if (! aout_link_free_symbols (abfd
))
3282 /* Look through the internal symbols to see if this object file should
3283 be included in the link. We should include this object file if it
3284 defines any symbols which are currently undefined. If this object
3285 file defines a common symbol, then we may adjust the size of the
3286 known symbol but we do not include the object file in the link
3287 (unless there is some other reason to include it). */
3290 aout_link_check_ar_symbols (bfd
*abfd
,
3291 struct bfd_link_info
*info
,
3292 bfd_boolean
*pneeded
,
3295 struct external_nlist
*p
;
3296 struct external_nlist
*pend
;
3301 /* Look through all the symbols. */
3302 p
= obj_aout_external_syms (abfd
);
3303 pend
= p
+ obj_aout_external_sym_count (abfd
);
3304 strings
= obj_aout_external_strings (abfd
);
3305 for (; p
< pend
; p
++)
3307 int type
= H_GET_8 (abfd
, p
->e_type
);
3309 struct bfd_link_hash_entry
*h
;
3311 /* Ignore symbols that are not externally visible. This is an
3312 optimization only, as we check the type more thoroughly
3314 if (((type
& N_EXT
) == 0
3315 || (type
& N_STAB
) != 0
3322 if (type
== N_WARNING
3328 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3329 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
3331 /* We are only interested in symbols that are currently
3332 undefined or common. */
3334 || (h
->type
!= bfd_link_hash_undefined
3335 && h
->type
!= bfd_link_hash_common
))
3337 if (type
== (N_INDR
| N_EXT
))
3342 if (type
== (N_TEXT
| N_EXT
)
3343 || type
== (N_DATA
| N_EXT
)
3344 || type
== (N_BSS
| N_EXT
)
3345 || type
== (N_ABS
| N_EXT
)
3346 || type
== (N_INDR
| N_EXT
))
3348 /* This object file defines this symbol. We must link it
3349 in. This is true regardless of whether the current
3350 definition of the symbol is undefined or common.
3352 If the current definition is common, we have a case in
3353 which we have already seen an object file including:
3355 and this object file from the archive includes:
3357 In such a case, whether to include this object is target
3358 dependant for backward compatibility.
3360 FIXME: The SunOS 4.1.3 linker will pull in the archive
3361 element if the symbol is defined in the .data section,
3362 but not if it is defined in the .text section. That
3363 seems a bit crazy to me, and it has not been implemented
3364 yet. However, it might be correct. */
3365 if (h
->type
== bfd_link_hash_common
)
3369 switch (info
->common_skip_ar_symbols
)
3371 case bfd_link_common_skip_none
:
3373 case bfd_link_common_skip_text
:
3374 skip
= (type
== (N_TEXT
| N_EXT
));
3376 case bfd_link_common_skip_data
:
3377 skip
= (type
== (N_DATA
| N_EXT
));
3379 case bfd_link_common_skip_all
:
3388 if (!(*info
->callbacks
3389 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3395 if (type
== (N_UNDF
| N_EXT
))
3399 value
= GET_WORD (abfd
, p
->e_value
);
3402 /* This symbol is common in the object from the archive
3404 if (h
->type
== bfd_link_hash_undefined
)
3409 symbfd
= h
->u
.undef
.abfd
;
3412 /* This symbol was created as undefined from
3413 outside BFD. We assume that we should link
3414 in the object file. This is done for the -u
3415 option in the linker. */
3416 if (!(*info
->callbacks
3417 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3422 /* Turn the current link symbol into a common
3423 symbol. It is already on the undefs list. */
3424 h
->type
= bfd_link_hash_common
;
3425 h
->u
.c
.p
= (struct bfd_link_hash_common_entry
*)
3426 bfd_hash_allocate (&info
->hash
->table
,
3427 sizeof (struct bfd_link_hash_common_entry
));
3428 if (h
->u
.c
.p
== NULL
)
3431 h
->u
.c
.size
= value
;
3433 /* FIXME: This isn't quite right. The maximum
3434 alignment of a common symbol should be set by the
3435 architecture of the output file, not of the input
3437 power
= bfd_log2 (value
);
3438 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3439 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3440 h
->u
.c
.p
->alignment_power
= power
;
3442 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3447 /* Adjust the size of the common symbol if
3449 if (value
> h
->u
.c
.size
)
3450 h
->u
.c
.size
= value
;
3460 /* This symbol is weak but defined. We must pull it in if
3461 the current link symbol is undefined, but we don't want
3462 it if the current link symbol is common. */
3463 if (h
->type
== bfd_link_hash_undefined
)
3465 if (!(*info
->callbacks
3466 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3474 /* We do not need this object file. */
3477 /* Check a single archive element to see if we need to include it in
3478 the link. *PNEEDED is set according to whether this element is
3479 needed in the link or not. This is called from
3480 _bfd_generic_link_add_archive_symbols. */
3483 aout_link_check_archive_element (bfd
*abfd
,
3484 struct bfd_link_info
*info
,
3485 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3486 const char *name ATTRIBUTE_UNUSED
,
3487 bfd_boolean
*pneeded
)
3492 if (!aout_get_external_symbols (abfd
))
3496 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
3502 /* Potentially, the add_archive_element hook may have set a
3503 substitute BFD for us. */
3506 if (!info
->keep_memory
3507 && !aout_link_free_symbols (oldbfd
))
3509 if (!aout_get_external_symbols (abfd
))
3512 if (!aout_link_add_symbols (abfd
, info
))
3516 if (!info
->keep_memory
|| !needed
)
3518 if (!aout_link_free_symbols (abfd
))
3525 /* Given an a.out BFD, add symbols to the global hash table as
3529 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
3531 switch (bfd_get_format (abfd
))
3534 return aout_link_add_object_symbols (abfd
, info
);
3536 return _bfd_generic_link_add_archive_symbols
3537 (abfd
, info
, aout_link_check_archive_element
);
3539 bfd_set_error (bfd_error_wrong_format
);
3544 /* A hash table used for header files with N_BINCL entries. */
3546 struct aout_link_includes_table
3548 struct bfd_hash_table root
;
3551 /* A linked list of totals that we have found for a particular header
3554 struct aout_link_includes_totals
3556 struct aout_link_includes_totals
*next
;
3560 /* An entry in the header file hash table. */
3562 struct aout_link_includes_entry
3564 struct bfd_hash_entry root
;
3565 /* List of totals we have found for this file. */
3566 struct aout_link_includes_totals
*totals
;
3569 /* Look up an entry in an the header file hash table. */
3571 #define aout_link_includes_lookup(table, string, create, copy) \
3572 ((struct aout_link_includes_entry *) \
3573 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3575 /* During the final link step we need to pass around a bunch of
3576 information, so we do it in an instance of this structure. */
3578 struct aout_final_link_info
3580 /* General link information. */
3581 struct bfd_link_info
*info
;
3584 /* Reloc file positions. */
3585 file_ptr treloff
, dreloff
;
3586 /* File position of symbols. */
3589 struct bfd_strtab_hash
*strtab
;
3590 /* Header file hash table. */
3591 struct aout_link_includes_table includes
;
3592 /* A buffer large enough to hold the contents of any section. */
3594 /* A buffer large enough to hold the relocs of any section. */
3596 /* A buffer large enough to hold the symbol map of any input BFD. */
3598 /* A buffer large enough to hold output symbols of any input BFD. */
3599 struct external_nlist
*output_syms
;
3602 /* The function to create a new entry in the header file hash table. */
3604 static struct bfd_hash_entry
*
3605 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3606 struct bfd_hash_table
*table
,
3609 struct aout_link_includes_entry
*ret
=
3610 (struct aout_link_includes_entry
*) entry
;
3612 /* Allocate the structure if it has not already been allocated by a
3615 ret
= (struct aout_link_includes_entry
*)
3616 bfd_hash_allocate (table
, sizeof (* ret
));
3620 /* Call the allocation method of the superclass. */
3621 ret
= ((struct aout_link_includes_entry
*)
3622 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3625 /* Set local fields. */
3629 return (struct bfd_hash_entry
*) ret
;
3632 /* Write out a symbol that was not associated with an a.out input
3636 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3638 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3639 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3643 struct external_nlist outsym
;
3647 if (h
->root
.type
== bfd_link_hash_warning
)
3649 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3650 if (h
->root
.type
== bfd_link_hash_new
)
3654 output_bfd
= flaginfo
->output_bfd
;
3656 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3658 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3659 (output_bfd
, flaginfo
->info
, h
)))
3661 /* FIXME: No way to handle errors. */
3671 /* An indx of -2 means the symbol must be written. */
3673 && (flaginfo
->info
->strip
== strip_all
3674 || (flaginfo
->info
->strip
== strip_some
3675 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3676 FALSE
, FALSE
) == NULL
)))
3679 switch (h
->root
.type
)
3682 case bfd_link_hash_warning
:
3684 /* Avoid variable not initialized warnings. */
3686 case bfd_link_hash_new
:
3687 /* This can happen for set symbols when sets are not being
3690 case bfd_link_hash_undefined
:
3691 type
= N_UNDF
| N_EXT
;
3694 case bfd_link_hash_defined
:
3695 case bfd_link_hash_defweak
:
3699 sec
= h
->root
.u
.def
.section
->output_section
;
3700 BFD_ASSERT (bfd_is_abs_section (sec
)
3701 || sec
->owner
== output_bfd
);
3702 if (sec
== obj_textsec (output_bfd
))
3703 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3704 else if (sec
== obj_datasec (output_bfd
))
3705 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3706 else if (sec
== obj_bsssec (output_bfd
))
3707 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3709 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3711 val
= (h
->root
.u
.def
.value
3713 + h
->root
.u
.def
.section
->output_offset
);
3716 case bfd_link_hash_common
:
3717 type
= N_UNDF
| N_EXT
;
3718 val
= h
->root
.u
.c
.size
;
3720 case bfd_link_hash_undefweak
:
3724 case bfd_link_hash_indirect
:
3725 /* We ignore these symbols, since the indirected symbol is
3726 already in the hash table. */
3730 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3731 H_PUT_8 (output_bfd
, 0, outsym
.e_other
);
3732 H_PUT_16 (output_bfd
, 0, outsym
.e_desc
);
3733 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3735 if (indx
== - (bfd_size_type
) 1)
3736 /* FIXME: No way to handle errors. */
3739 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3740 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3742 amt
= EXTERNAL_NLIST_SIZE
;
3743 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3744 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3745 /* FIXME: No way to handle errors. */
3748 flaginfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
3749 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3750 ++obj_aout_external_sym_count (output_bfd
);
3755 /* Handle a link order which is supposed to generate a reloc. */
3758 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3760 struct bfd_link_order
*p
)
3762 struct bfd_link_order_reloc
*pr
;
3765 reloc_howto_type
*howto
;
3766 file_ptr
*reloff_ptr
= NULL
;
3767 struct reloc_std_external srel
;
3768 struct reloc_ext_external erel
;
3774 if (p
->type
== bfd_section_reloc_link_order
)
3777 if (bfd_is_abs_section (pr
->u
.section
))
3778 r_index
= N_ABS
| N_EXT
;
3781 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3782 r_index
= pr
->u
.section
->target_index
;
3787 struct aout_link_hash_entry
*h
;
3789 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3791 h
= ((struct aout_link_hash_entry
*)
3792 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3793 pr
->u
.name
, FALSE
, FALSE
, TRUE
));
3799 /* We decided to strip this symbol, but it turns out that we
3800 can't. Note that we lose the other and desc information
3801 here. I don't think that will ever matter for a global
3805 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3811 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3812 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3817 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3820 bfd_set_error (bfd_error_bad_value
);
3824 if (o
== obj_textsec (flaginfo
->output_bfd
))
3825 reloff_ptr
= &flaginfo
->treloff
;
3826 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3827 reloff_ptr
= &flaginfo
->dreloff
;
3831 if (obj_reloc_entry_size (flaginfo
->output_bfd
) == RELOC_STD_SIZE
)
3834 MY_put_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3844 r_pcrel
= (int) howto
->pc_relative
;
3845 r_baserel
= (howto
->type
& 8) != 0;
3846 r_jmptable
= (howto
->type
& 16) != 0;
3847 r_relative
= (howto
->type
& 32) != 0;
3848 r_length
= howto
->size
;
3850 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3851 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3853 srel
.r_index
[0] = r_index
>> 16;
3854 srel
.r_index
[1] = r_index
>> 8;
3855 srel
.r_index
[2] = r_index
;
3857 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3858 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3859 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3860 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3861 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3862 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3866 srel
.r_index
[2] = r_index
>> 16;
3867 srel
.r_index
[1] = r_index
>> 8;
3868 srel
.r_index
[0] = r_index
;
3870 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3871 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3872 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3873 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3874 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3875 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3879 rel_ptr
= (void *) &srel
;
3881 /* We have to write the addend into the object file, since
3882 standard a.out relocs are in place. It would be more
3883 reliable if we had the current contents of the file here,
3884 rather than assuming zeroes, but we can't read the file since
3885 it was opened using bfd_openw. */
3886 if (pr
->addend
!= 0)
3889 bfd_reloc_status_type r
;
3893 size
= bfd_get_reloc_size (howto
);
3894 buf
= (bfd_byte
*) bfd_zmalloc (size
);
3895 if (buf
== NULL
&& size
!= 0)
3897 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3898 (bfd_vma
) pr
->addend
, buf
);
3904 case bfd_reloc_outofrange
:
3906 case bfd_reloc_overflow
:
3907 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3908 (flaginfo
->info
, NULL
,
3909 (p
->type
== bfd_section_reloc_link_order
3910 ? bfd_section_name (flaginfo
->output_bfd
,
3913 howto
->name
, pr
->addend
, NULL
, NULL
, (bfd_vma
) 0);
3916 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
, (void *) buf
,
3917 (file_ptr
) p
->offset
, size
);
3925 #ifdef MY_put_ext_reloc
3926 MY_put_ext_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
,
3927 howto
, &erel
, pr
->addend
);
3929 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, erel
.r_address
);
3931 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3933 erel
.r_index
[0] = r_index
>> 16;
3934 erel
.r_index
[1] = r_index
>> 8;
3935 erel
.r_index
[2] = r_index
;
3937 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
3938 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
3942 erel
.r_index
[2] = r_index
>> 16;
3943 erel
.r_index
[1] = r_index
>> 8;
3944 erel
.r_index
[0] = r_index
;
3946 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
3947 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
3950 PUT_WORD (flaginfo
->output_bfd
, (bfd_vma
) pr
->addend
, erel
.r_addend
);
3951 #endif /* MY_put_ext_reloc */
3953 rel_ptr
= (void *) &erel
;
3956 amt
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3957 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3958 || bfd_bwrite (rel_ptr
, amt
, flaginfo
->output_bfd
) != amt
)
3961 *reloff_ptr
+= obj_reloc_entry_size (flaginfo
->output_bfd
);
3963 /* Assert that the relocs have not run into the symbols, and that n
3964 the text relocs have not run into the data relocs. */
3965 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3966 && (reloff_ptr
!= &flaginfo
->treloff
3968 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3973 /* Get the section corresponding to a reloc index. */
3975 static INLINE asection
*
3976 aout_reloc_index_to_section (bfd
*abfd
, int indx
)
3978 switch (indx
& N_TYPE
)
3980 case N_TEXT
: return obj_textsec (abfd
);
3981 case N_DATA
: return obj_datasec (abfd
);
3982 case N_BSS
: return obj_bsssec (abfd
);
3984 case N_UNDF
: return bfd_abs_section_ptr
;
3990 /* Relocate an a.out section using standard a.out relocs. */
3993 aout_link_input_section_std (struct aout_final_link_info
*flaginfo
,
3995 asection
*input_section
,
3996 struct reloc_std_external
*relocs
,
3997 bfd_size_type rel_size
,
4000 bfd_boolean (*check_dynamic_reloc
)
4001 (struct bfd_link_info
*, bfd
*, asection
*,
4002 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4005 bfd_boolean relocatable
;
4006 struct external_nlist
*syms
;
4008 struct aout_link_hash_entry
**sym_hashes
;
4010 bfd_size_type reloc_count
;
4011 struct reloc_std_external
*rel
;
4012 struct reloc_std_external
*rel_end
;
4014 output_bfd
= flaginfo
->output_bfd
;
4015 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4017 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
4018 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4019 == output_bfd
->xvec
->header_byteorder
);
4021 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4022 syms
= obj_aout_external_syms (input_bfd
);
4023 strings
= obj_aout_external_strings (input_bfd
);
4024 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4025 symbol_map
= flaginfo
->symbol_map
;
4027 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4029 rel_end
= rel
+ reloc_count
;
4030 for (; rel
< rel_end
; rel
++)
4037 reloc_howto_type
*howto
;
4038 struct aout_link_hash_entry
*h
= NULL
;
4040 bfd_reloc_status_type r
;
4042 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4044 #ifdef MY_reloc_howto
4045 howto
= MY_reloc_howto (input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
4051 unsigned int howto_idx
;
4053 if (bfd_header_big_endian (input_bfd
))
4055 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4056 | ((unsigned int) rel
->r_index
[1] << 8)
4058 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4059 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4060 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4061 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4062 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4063 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4064 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4068 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4069 | ((unsigned int) rel
->r_index
[1] << 8)
4071 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4072 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4073 r_baserel
= (0 != (rel
->r_type
[0]
4074 & RELOC_STD_BITS_BASEREL_LITTLE
));
4075 r_jmptable
= (0 != (rel
->r_type
[0]
4076 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4077 r_relative
= (0 != (rel
->r_type
[0]
4078 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4079 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4080 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4083 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4084 + 16 * r_jmptable
+ 32 * r_relative
);
4085 if (howto_idx
< TABLE_SIZE (howto_table_std
))
4086 howto
= howto_table_std
+ howto_idx
;
4094 _bfd_error_handler (_("%pB: unsupported relocation type"),
4096 bfd_set_error (bfd_error_bad_value
);
4102 /* We are generating a relocatable output file, and must
4103 modify the reloc accordingly. */
4106 /* If we know the symbol this relocation is against,
4107 convert it into a relocation against a section. This
4108 is what the native linker does. */
4109 h
= sym_hashes
[r_index
];
4111 && (h
->root
.type
== bfd_link_hash_defined
4112 || h
->root
.type
== bfd_link_hash_defweak
))
4114 asection
*output_section
;
4116 /* Change the r_extern value. */
4117 if (bfd_header_big_endian (output_bfd
))
4118 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4120 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4122 /* Compute a new r_index. */
4123 output_section
= h
->root
.u
.def
.section
->output_section
;
4124 if (output_section
== obj_textsec (output_bfd
))
4126 else if (output_section
== obj_datasec (output_bfd
))
4128 else if (output_section
== obj_bsssec (output_bfd
))
4133 /* Add the symbol value and the section VMA to the
4134 addend stored in the contents. */
4135 relocation
= (h
->root
.u
.def
.value
4136 + output_section
->vma
4137 + h
->root
.u
.def
.section
->output_offset
);
4141 /* We must change r_index according to the symbol
4143 r_index
= symbol_map
[r_index
];
4149 /* We decided to strip this symbol, but it
4150 turns out that we can't. Note that we
4151 lose the other and desc information here.
4152 I don't think that will ever matter for a
4158 if (!aout_link_write_other_symbol (&h
->root
.root
,
4168 name
= strings
+ GET_WORD (input_bfd
,
4169 syms
[r_index
].e_strx
);
4170 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4171 (flaginfo
->info
, name
,
4172 input_bfd
, input_section
, r_addr
);
4180 /* Write out the new r_index value. */
4181 if (bfd_header_big_endian (output_bfd
))
4183 rel
->r_index
[0] = r_index
>> 16;
4184 rel
->r_index
[1] = r_index
>> 8;
4185 rel
->r_index
[2] = r_index
;
4189 rel
->r_index
[2] = r_index
>> 16;
4190 rel
->r_index
[1] = r_index
>> 8;
4191 rel
->r_index
[0] = r_index
;
4198 /* This is a relocation against a section. We must
4199 adjust by the amount that the section moved. */
4200 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4201 relocation
= (section
->output_section
->vma
4202 + section
->output_offset
4206 /* Change the address of the relocation. */
4207 PUT_WORD (output_bfd
,
4208 r_addr
+ input_section
->output_offset
,
4211 /* Adjust a PC relative relocation by removing the reference
4212 to the original address in the section and including the
4213 reference to the new address. */
4215 relocation
-= (input_section
->output_section
->vma
4216 + input_section
->output_offset
4217 - input_section
->vma
);
4219 #ifdef MY_relocatable_reloc
4220 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4223 if (relocation
== 0)
4226 r
= MY_relocate_contents (howto
,
4227 input_bfd
, relocation
,
4234 /* We are generating an executable, and must do a full
4240 h
= sym_hashes
[r_index
];
4243 && (h
->root
.type
== bfd_link_hash_defined
4244 || h
->root
.type
== bfd_link_hash_defweak
))
4246 relocation
= (h
->root
.u
.def
.value
4247 + h
->root
.u
.def
.section
->output_section
->vma
4248 + h
->root
.u
.def
.section
->output_offset
);
4251 && h
->root
.type
== bfd_link_hash_undefweak
)
4263 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4264 relocation
= (section
->output_section
->vma
4265 + section
->output_offset
4268 relocation
+= input_section
->vma
;
4271 if (check_dynamic_reloc
!= NULL
)
4275 if (! ((*check_dynamic_reloc
)
4276 (flaginfo
->info
, input_bfd
, input_section
, h
,
4277 (void *) rel
, contents
, &skip
, &relocation
)))
4283 /* Now warn if a global symbol is undefined. We could not
4284 do this earlier, because check_dynamic_reloc might want
4285 to skip this reloc. */
4286 if (hundef
&& ! bfd_link_pic (flaginfo
->info
) && ! r_baserel
)
4291 name
= h
->root
.root
.string
;
4293 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4294 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4295 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4298 r
= MY_final_link_relocate (howto
,
4299 input_bfd
, input_section
,
4300 contents
, r_addr
, relocation
,
4304 if (r
!= bfd_reloc_ok
)
4309 case bfd_reloc_outofrange
:
4311 case bfd_reloc_overflow
:
4318 name
= strings
+ GET_WORD (input_bfd
,
4319 syms
[r_index
].e_strx
);
4324 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4325 name
= bfd_section_name (input_bfd
, s
);
4327 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4328 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4329 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
4339 /* Relocate an a.out section using extended a.out relocs. */
4342 aout_link_input_section_ext (struct aout_final_link_info
*flaginfo
,
4344 asection
*input_section
,
4345 struct reloc_ext_external
*relocs
,
4346 bfd_size_type rel_size
,
4349 bfd_boolean (*check_dynamic_reloc
)
4350 (struct bfd_link_info
*, bfd
*, asection
*,
4351 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4354 bfd_boolean relocatable
;
4355 struct external_nlist
*syms
;
4357 struct aout_link_hash_entry
**sym_hashes
;
4359 bfd_size_type reloc_count
;
4360 struct reloc_ext_external
*rel
;
4361 struct reloc_ext_external
*rel_end
;
4363 output_bfd
= flaginfo
->output_bfd
;
4364 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4366 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4367 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4368 == output_bfd
->xvec
->header_byteorder
);
4370 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4371 syms
= obj_aout_external_syms (input_bfd
);
4372 strings
= obj_aout_external_strings (input_bfd
);
4373 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4374 symbol_map
= flaginfo
->symbol_map
;
4376 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4378 rel_end
= rel
+ reloc_count
;
4379 for (; rel
< rel_end
; rel
++)
4384 unsigned int r_type
;
4386 struct aout_link_hash_entry
*h
= NULL
;
4387 asection
*r_section
= NULL
;
4390 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4392 if (bfd_header_big_endian (input_bfd
))
4394 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4395 | ((unsigned int) rel
->r_index
[1] << 8)
4397 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4398 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4399 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4403 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4404 | ((unsigned int) rel
->r_index
[1] << 8)
4406 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4407 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4408 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4411 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4413 if (r_type
>= TABLE_SIZE (howto_table_ext
))
4415 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
4417 bfd_set_error (bfd_error_bad_value
);
4423 /* We are generating a relocatable output file, and must
4424 modify the reloc accordingly. */
4426 || r_type
== (unsigned int) RELOC_BASE10
4427 || r_type
== (unsigned int) RELOC_BASE13
4428 || r_type
== (unsigned int) RELOC_BASE22
)
4430 /* If we know the symbol this relocation is against,
4431 convert it into a relocation against a section. This
4432 is what the native linker does. */
4433 if (r_type
== (unsigned int) RELOC_BASE10
4434 || r_type
== (unsigned int) RELOC_BASE13
4435 || r_type
== (unsigned int) RELOC_BASE22
)
4438 h
= sym_hashes
[r_index
];
4440 && (h
->root
.type
== bfd_link_hash_defined
4441 || h
->root
.type
== bfd_link_hash_defweak
))
4443 asection
*output_section
;
4445 /* Change the r_extern value. */
4446 if (bfd_header_big_endian (output_bfd
))
4447 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4449 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4451 /* Compute a new r_index. */
4452 output_section
= h
->root
.u
.def
.section
->output_section
;
4453 if (output_section
== obj_textsec (output_bfd
))
4455 else if (output_section
== obj_datasec (output_bfd
))
4457 else if (output_section
== obj_bsssec (output_bfd
))
4462 /* Add the symbol value and the section VMA to the
4464 relocation
= (h
->root
.u
.def
.value
4465 + output_section
->vma
4466 + h
->root
.u
.def
.section
->output_offset
);
4468 /* Now RELOCATION is the VMA of the final
4469 destination. If this is a PC relative reloc,
4470 then ADDEND is the negative of the source VMA.
4471 We want to set ADDEND to the difference between
4472 the destination VMA and the source VMA, which
4473 means we must adjust RELOCATION by the change in
4474 the source VMA. This is done below. */
4478 /* We must change r_index according to the symbol
4480 r_index
= symbol_map
[r_index
];
4486 /* We decided to strip this symbol, but it
4487 turns out that we can't. Note that we
4488 lose the other and desc information here.
4489 I don't think that will ever matter for a
4495 if (!aout_link_write_other_symbol (&h
->root
.root
,
4505 name
= strings
+ GET_WORD (input_bfd
,
4506 syms
[r_index
].e_strx
);
4507 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4508 (flaginfo
->info
, name
,
4509 input_bfd
, input_section
, r_addr
);
4516 /* If this is a PC relative reloc, then the addend
4517 is the negative of the source VMA. We must
4518 adjust it by the change in the source VMA. This
4522 /* Write out the new r_index value. */
4523 if (bfd_header_big_endian (output_bfd
))
4525 rel
->r_index
[0] = r_index
>> 16;
4526 rel
->r_index
[1] = r_index
>> 8;
4527 rel
->r_index
[2] = r_index
;
4531 rel
->r_index
[2] = r_index
>> 16;
4532 rel
->r_index
[1] = r_index
>> 8;
4533 rel
->r_index
[0] = r_index
;
4538 /* This is a relocation against a section. We must
4539 adjust by the amount that the section moved. */
4540 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4541 relocation
= (r_section
->output_section
->vma
4542 + r_section
->output_offset
4545 /* If this is a PC relative reloc, then the addend is
4546 the difference in VMA between the destination and the
4547 source. We have just adjusted for the change in VMA
4548 of the destination, so we must also adjust by the
4549 change in VMA of the source. This is done below. */
4552 /* As described above, we must always adjust a PC relative
4553 reloc by the change in VMA of the source. However, if
4554 pcrel_offset is set, then the addend does not include the
4555 location within the section, in which case we don't need
4556 to adjust anything. */
4557 if (howto_table_ext
[r_type
].pc_relative
4558 && ! howto_table_ext
[r_type
].pcrel_offset
)
4559 relocation
-= (input_section
->output_section
->vma
4560 + input_section
->output_offset
4561 - input_section
->vma
);
4563 /* Change the addend if necessary. */
4564 if (relocation
!= 0)
4565 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4567 /* Change the address of the relocation. */
4568 PUT_WORD (output_bfd
,
4569 r_addr
+ input_section
->output_offset
,
4575 bfd_reloc_status_type r
;
4577 /* We are generating an executable, and must do a full
4583 h
= sym_hashes
[r_index
];
4586 && (h
->root
.type
== bfd_link_hash_defined
4587 || h
->root
.type
== bfd_link_hash_defweak
))
4589 relocation
= (h
->root
.u
.def
.value
4590 + h
->root
.u
.def
.section
->output_section
->vma
4591 + h
->root
.u
.def
.section
->output_offset
);
4594 && h
->root
.type
== bfd_link_hash_undefweak
)
4602 else if (r_type
== (unsigned int) RELOC_BASE10
4603 || r_type
== (unsigned int) RELOC_BASE13
4604 || r_type
== (unsigned int) RELOC_BASE22
)
4606 struct external_nlist
*sym
;
4609 /* For base relative relocs, r_index is always an index
4610 into the symbol table, even if r_extern is 0. */
4611 sym
= syms
+ r_index
;
4612 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4613 if ((type
& N_TYPE
) == N_TEXT
4615 r_section
= obj_textsec (input_bfd
);
4616 else if ((type
& N_TYPE
) == N_DATA
4618 r_section
= obj_datasec (input_bfd
);
4619 else if ((type
& N_TYPE
) == N_BSS
4621 r_section
= obj_bsssec (input_bfd
);
4622 else if ((type
& N_TYPE
) == N_ABS
4624 r_section
= bfd_abs_section_ptr
;
4627 relocation
= (r_section
->output_section
->vma
4628 + r_section
->output_offset
4629 + (GET_WORD (input_bfd
, sym
->e_value
)
4634 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4636 /* If this is a PC relative reloc, then R_ADDEND is the
4637 difference between the two vmas, or
4638 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4640 old_dest_sec == section->vma
4642 old_src_sec == input_section->vma
4644 old_src_off == r_addr
4646 _bfd_final_link_relocate expects RELOCATION +
4647 R_ADDEND to be the VMA of the destination minus
4648 r_addr (the minus r_addr is because this relocation
4649 is not pcrel_offset, which is a bit confusing and
4650 should, perhaps, be changed), or
4653 new_dest_sec == output_section->vma + output_offset
4654 We arrange for this to happen by setting RELOCATION to
4655 new_dest_sec + old_src_sec - old_dest_sec
4657 If this is not a PC relative reloc, then R_ADDEND is
4658 simply the VMA of the destination, so we set
4659 RELOCATION to the change in the destination VMA, or
4660 new_dest_sec - old_dest_sec
4662 relocation
= (r_section
->output_section
->vma
4663 + r_section
->output_offset
4665 if (howto_table_ext
[r_type
].pc_relative
)
4666 relocation
+= input_section
->vma
;
4669 if (check_dynamic_reloc
!= NULL
)
4673 if (! ((*check_dynamic_reloc
)
4674 (flaginfo
->info
, input_bfd
, input_section
, h
,
4675 (void *) rel
, contents
, &skip
, &relocation
)))
4681 /* Now warn if a global symbol is undefined. We could not
4682 do this earlier, because check_dynamic_reloc might want
4683 to skip this reloc. */
4685 && ! bfd_link_pic (flaginfo
->info
)
4686 && r_type
!= (unsigned int) RELOC_BASE10
4687 && r_type
!= (unsigned int) RELOC_BASE13
4688 && r_type
!= (unsigned int) RELOC_BASE22
)
4693 name
= h
->root
.root
.string
;
4695 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4696 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4697 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4700 if (r_type
!= (unsigned int) RELOC_SPARC_REV32
)
4701 r
= MY_final_link_relocate (howto_table_ext
+ r_type
,
4702 input_bfd
, input_section
,
4703 contents
, r_addr
, relocation
,
4709 x
= bfd_get_32 (input_bfd
, contents
+ r_addr
);
4710 x
= x
+ relocation
+ r_addend
;
4711 bfd_putl32 (/*input_bfd,*/ x
, contents
+ r_addr
);
4715 if (r
!= bfd_reloc_ok
)
4720 case bfd_reloc_outofrange
:
4722 case bfd_reloc_overflow
:
4729 || r_type
== (unsigned int) RELOC_BASE10
4730 || r_type
== (unsigned int) RELOC_BASE13
4731 || r_type
== (unsigned int) RELOC_BASE22
)
4732 name
= strings
+ GET_WORD (input_bfd
,
4733 syms
[r_index
].e_strx
);
4738 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4739 name
= bfd_section_name (input_bfd
, s
);
4741 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4742 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
,
4743 howto_table_ext
[r_type
].name
,
4744 r_addend
, input_bfd
, input_section
, r_addr
);
4755 /* Link an a.out section into the output file. */
4758 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
4760 asection
*input_section
,
4761 file_ptr
*reloff_ptr
,
4762 bfd_size_type rel_size
)
4764 bfd_size_type input_size
;
4767 /* Get the section contents. */
4768 input_size
= input_section
->size
;
4769 if (! bfd_get_section_contents (input_bfd
, input_section
,
4770 (void *) flaginfo
->contents
,
4771 (file_ptr
) 0, input_size
))
4774 /* Read in the relocs if we haven't already done it. */
4775 if (aout_section_data (input_section
) != NULL
4776 && aout_section_data (input_section
)->relocs
!= NULL
)
4777 relocs
= aout_section_data (input_section
)->relocs
;
4780 relocs
= flaginfo
->relocs
;
4783 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4784 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
4789 /* Relocate the section contents. */
4790 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4792 if (! aout_link_input_section_std (flaginfo
, input_bfd
, input_section
,
4793 (struct reloc_std_external
*) relocs
,
4794 rel_size
, flaginfo
->contents
))
4799 if (! aout_link_input_section_ext (flaginfo
, input_bfd
, input_section
,
4800 (struct reloc_ext_external
*) relocs
,
4801 rel_size
, flaginfo
->contents
))
4805 /* Write out the section contents. */
4806 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
4807 input_section
->output_section
,
4808 (void *) flaginfo
->contents
,
4809 (file_ptr
) input_section
->output_offset
,
4813 /* If we are producing relocatable output, the relocs were
4814 modified, and we now write them out. */
4815 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
4817 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4819 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
4821 *reloff_ptr
+= rel_size
;
4823 /* Assert that the relocs have not run into the symbols, and
4824 that if these are the text relocs they have not run into the
4826 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
4827 && (reloff_ptr
!= &flaginfo
->treloff
4829 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
4835 /* Adjust and write out the symbols for an a.out file. Set the new
4836 symbol indices into a symbol_map. */
4839 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4842 bfd_size_type sym_count
;
4844 enum bfd_link_strip strip
;
4845 enum bfd_link_discard discard
;
4846 struct external_nlist
*outsym
;
4847 bfd_size_type strtab_index
;
4848 struct external_nlist
*sym
;
4849 struct external_nlist
*sym_end
;
4850 struct aout_link_hash_entry
**sym_hash
;
4853 bfd_boolean skip_next
;
4855 output_bfd
= flaginfo
->output_bfd
;
4856 sym_count
= obj_aout_external_sym_count (input_bfd
);
4857 strings
= obj_aout_external_strings (input_bfd
);
4858 strip
= flaginfo
->info
->strip
;
4859 discard
= flaginfo
->info
->discard
;
4860 outsym
= flaginfo
->output_syms
;
4862 /* First write out a symbol for this object file, unless we are
4863 discarding such symbols. */
4864 if (strip
!= strip_all
4865 && (strip
!= strip_some
4866 || bfd_hash_lookup (flaginfo
->info
->keep_hash
, input_bfd
->filename
,
4867 FALSE
, FALSE
) != NULL
)
4868 && discard
!= discard_all
)
4870 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4871 H_PUT_8 (output_bfd
, 0, outsym
->e_other
);
4872 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4873 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4874 input_bfd
->filename
, FALSE
);
4875 if (strtab_index
== (bfd_size_type
) -1)
4877 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4878 PUT_WORD (output_bfd
,
4879 (bfd_get_section_vma (output_bfd
,
4880 obj_textsec (input_bfd
)->output_section
)
4881 + obj_textsec (input_bfd
)->output_offset
),
4883 ++obj_aout_external_sym_count (output_bfd
);
4889 sym
= obj_aout_external_syms (input_bfd
);
4890 sym_end
= sym
+ sym_count
;
4891 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4892 symbol_map
= flaginfo
->symbol_map
;
4893 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4894 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4898 struct aout_link_hash_entry
*h
;
4904 /* We set *symbol_map to 0 above for all symbols. If it has
4905 already been set to -1 for this symbol, it means that we are
4906 discarding it because it appears in a duplicate header file.
4907 See the N_BINCL code below. */
4908 if (*symbol_map
== -1)
4911 /* Initialize *symbol_map to -1, which means that the symbol was
4912 not copied into the output file. We will change it later if
4913 we do copy the symbol over. */
4916 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4917 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4923 /* Pass this symbol through. It is the target of an
4924 indirect or warning symbol. */
4925 val
= GET_WORD (input_bfd
, sym
->e_value
);
4930 /* Skip this symbol, which is the target of an indirect
4931 symbol that we have changed to no longer be an indirect
4938 struct aout_link_hash_entry
*hresolve
;
4940 /* We have saved the hash table entry for this symbol, if
4941 there is one. Note that we could just look it up again
4942 in the hash table, provided we first check that it is an
4946 /* Use the name from the hash table, in case the symbol was
4949 && h
->root
.type
!= bfd_link_hash_warning
)
4950 name
= h
->root
.root
.string
;
4952 /* If this is an indirect or warning symbol, then change
4953 hresolve to the base symbol. We also change *sym_hash so
4954 that the relocation routines relocate against the real
4957 if (h
!= (struct aout_link_hash_entry
*) NULL
4958 && (h
->root
.type
== bfd_link_hash_indirect
4959 || h
->root
.type
== bfd_link_hash_warning
))
4961 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4962 while (hresolve
->root
.type
== bfd_link_hash_indirect
4963 || hresolve
->root
.type
== bfd_link_hash_warning
)
4964 hresolve
= ((struct aout_link_hash_entry
*)
4965 hresolve
->root
.u
.i
.link
);
4966 *sym_hash
= hresolve
;
4969 /* If the symbol has already been written out, skip it. */
4973 if ((type
& N_TYPE
) == N_INDR
4974 || type
== N_WARNING
)
4976 *symbol_map
= h
->indx
;
4980 /* See if we are stripping this symbol. */
4986 case strip_debugger
:
4987 if ((type
& N_STAB
) != 0)
4991 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
5006 /* Get the value of the symbol. */
5007 if ((type
& N_TYPE
) == N_TEXT
5009 symsec
= obj_textsec (input_bfd
);
5010 else if ((type
& N_TYPE
) == N_DATA
5012 symsec
= obj_datasec (input_bfd
);
5013 else if ((type
& N_TYPE
) == N_BSS
5015 symsec
= obj_bsssec (input_bfd
);
5016 else if ((type
& N_TYPE
) == N_ABS
5018 symsec
= bfd_abs_section_ptr
;
5019 else if (((type
& N_TYPE
) == N_INDR
5020 && (hresolve
== NULL
5021 || (hresolve
->root
.type
!= bfd_link_hash_defined
5022 && hresolve
->root
.type
!= bfd_link_hash_defweak
5023 && hresolve
->root
.type
!= bfd_link_hash_common
)))
5024 || type
== N_WARNING
)
5026 /* Pass the next symbol through unchanged. The
5027 condition above for indirect symbols is so that if
5028 the indirect symbol was defined, we output it with
5029 the correct definition so the debugger will
5032 val
= GET_WORD (input_bfd
, sym
->e_value
);
5035 else if ((type
& N_STAB
) != 0)
5037 val
= GET_WORD (input_bfd
, sym
->e_value
);
5042 /* If we get here with an indirect symbol, it means that
5043 we are outputting it with a real definition. In such
5044 a case we do not want to output the next symbol,
5045 which is the target of the indirection. */
5046 if ((type
& N_TYPE
) == N_INDR
)
5051 /* We need to get the value from the hash table. We use
5052 hresolve so that if we have defined an indirect
5053 symbol we output the final definition. */
5056 switch (type
& N_TYPE
)
5059 symsec
= obj_textsec (input_bfd
);
5062 symsec
= obj_datasec (input_bfd
);
5065 symsec
= obj_bsssec (input_bfd
);
5068 symsec
= bfd_abs_section_ptr
;
5075 else if (hresolve
->root
.type
== bfd_link_hash_defined
5076 || hresolve
->root
.type
== bfd_link_hash_defweak
)
5078 asection
*input_section
;
5079 asection
*output_section
;
5081 /* This case usually means a common symbol which was
5082 turned into a defined symbol. */
5083 input_section
= hresolve
->root
.u
.def
.section
;
5084 output_section
= input_section
->output_section
;
5085 BFD_ASSERT (bfd_is_abs_section (output_section
)
5086 || output_section
->owner
== output_bfd
);
5087 val
= (hresolve
->root
.u
.def
.value
5088 + bfd_get_section_vma (output_bfd
, output_section
)
5089 + input_section
->output_offset
);
5091 /* Get the correct type based on the section. If
5092 this is a constructed set, force it to be
5093 globally visible. */
5102 if (output_section
== obj_textsec (output_bfd
))
5103 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5106 else if (output_section
== obj_datasec (output_bfd
))
5107 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5110 else if (output_section
== obj_bsssec (output_bfd
))
5111 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5115 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5119 else if (hresolve
->root
.type
== bfd_link_hash_common
)
5120 val
= hresolve
->root
.u
.c
.size
;
5121 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
5130 val
= (symsec
->output_section
->vma
5131 + symsec
->output_offset
5132 + (GET_WORD (input_bfd
, sym
->e_value
)
5135 /* If this is a global symbol set the written flag, and if
5136 it is a local symbol see if we should discard it. */
5140 h
->indx
= obj_aout_external_sym_count (output_bfd
);
5142 else if ((type
& N_TYPE
) != N_SETT
5143 && (type
& N_TYPE
) != N_SETD
5144 && (type
& N_TYPE
) != N_SETB
5145 && (type
& N_TYPE
) != N_SETA
)
5150 case discard_sec_merge
:
5153 if ((type
& N_STAB
) == 0
5154 && bfd_is_local_label_name (input_bfd
, name
))
5168 /* An N_BINCL symbol indicates the start of the stabs
5169 entries for a header file. We need to scan ahead to the
5170 next N_EINCL symbol, ignoring nesting, adding up all the
5171 characters in the symbol names, not including the file
5172 numbers in types (the first number after an open
5174 if (type
== (int) N_BINCL
)
5176 struct external_nlist
*incl_sym
;
5178 struct aout_link_includes_entry
*incl_entry
;
5179 struct aout_link_includes_totals
*t
;
5183 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
5187 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5188 if (incl_type
== (int) N_EINCL
)
5194 else if (incl_type
== (int) N_BINCL
)
5200 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
5201 for (; *s
!= '\0'; s
++)
5206 /* Skip the file number. */
5208 while (ISDIGIT (*s
))
5216 /* If we have already included a header file with the
5217 same value, then replace this one with an N_EXCL
5219 copy
= (bfd_boolean
) (! flaginfo
->info
->keep_memory
);
5220 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
5222 if (incl_entry
== NULL
)
5224 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
5225 if (t
->total
== val
)
5229 /* This is the first time we have seen this header
5230 file with this set of stabs strings. */
5231 t
= (struct aout_link_includes_totals
*)
5232 bfd_hash_allocate (&flaginfo
->includes
.root
,
5237 t
->next
= incl_entry
->totals
;
5238 incl_entry
->totals
= t
;
5244 /* This is a duplicate header file. We must change
5245 it to be an N_EXCL entry, and mark all the
5246 included symbols to prevent outputting them. */
5247 type
= (int) N_EXCL
;
5250 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
5252 incl_sym
++, incl_map
++)
5256 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5257 if (incl_type
== (int) N_EINCL
)
5266 else if (incl_type
== (int) N_BINCL
)
5275 /* Copy this symbol into the list of symbols we are going to
5277 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
5278 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_other
), outsym
->e_other
);
5279 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
5281 if (! flaginfo
->info
->keep_memory
)
5283 /* name points into a string table which we are going to
5284 free. If there is a hash table entry, use that string.
5285 Otherwise, copy name into memory. */
5287 name
= h
->root
.root
.string
;
5291 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
5293 if (strtab_index
== (bfd_size_type
) -1)
5295 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
5296 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
5297 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
5298 ++obj_aout_external_sym_count (output_bfd
);
5302 /* Write out the output symbols we have just constructed. */
5303 if (outsym
> flaginfo
->output_syms
)
5305 bfd_size_type outsym_size
;
5307 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
5309 outsym_size
= outsym
- flaginfo
->output_syms
;
5310 outsym_size
*= EXTERNAL_NLIST_SIZE
;
5311 if (bfd_bwrite ((void *) flaginfo
->output_syms
, outsym_size
, output_bfd
)
5314 flaginfo
->symoff
+= outsym_size
;
5320 /* Link an a.out input BFD into the output file. */
5323 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
5325 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
5327 /* If this is a dynamic object, it may need special handling. */
5328 if ((input_bfd
->flags
& DYNAMIC
) != 0
5329 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
5330 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
5331 (flaginfo
->info
, input_bfd
));
5333 /* Get the symbols. We probably have them already, unless
5334 flaginfo->info->keep_memory is FALSE. */
5335 if (! aout_get_external_symbols (input_bfd
))
5338 /* Write out the symbols and get a map of the new indices. The map
5339 is placed into flaginfo->symbol_map. */
5340 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
5343 /* Relocate and write out the sections. These functions use the
5344 symbol map created by aout_link_write_symbols. The linker_mark
5345 field will be set if these sections are to be included in the
5346 link, which will normally be the case. */
5347 if (obj_textsec (input_bfd
)->linker_mark
)
5349 if (! aout_link_input_section (flaginfo
, input_bfd
,
5350 obj_textsec (input_bfd
),
5352 exec_hdr (input_bfd
)->a_trsize
))
5355 if (obj_datasec (input_bfd
)->linker_mark
)
5357 if (! aout_link_input_section (flaginfo
, input_bfd
,
5358 obj_datasec (input_bfd
),
5360 exec_hdr (input_bfd
)->a_drsize
))
5364 /* If we are not keeping memory, we don't need the symbols any
5365 longer. We still need them if we are keeping memory, because the
5366 strings in the hash table point into them. */
5367 if (! flaginfo
->info
->keep_memory
)
5369 if (! aout_link_free_symbols (input_bfd
))
5376 /* Do the final link step. This is called on the output BFD. The
5377 INFO structure should point to a list of BFDs linked through the
5378 link.next field which can be used to find each BFD which takes part
5379 in the output. Also, each section in ABFD should point to a list
5380 of bfd_link_order structures which list all the input sections for
5381 the output section. */
5384 NAME (aout
, final_link
) (bfd
*abfd
,
5385 struct bfd_link_info
*info
,
5386 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
5388 struct aout_final_link_info aout_info
;
5389 bfd_boolean includes_hash_initialized
= FALSE
;
5391 bfd_size_type trsize
, drsize
;
5392 bfd_size_type max_contents_size
;
5393 bfd_size_type max_relocs_size
;
5394 bfd_size_type max_sym_count
;
5395 struct bfd_link_order
*p
;
5397 bfd_boolean have_link_order_relocs
;
5399 if (bfd_link_pic (info
))
5400 abfd
->flags
|= DYNAMIC
;
5402 aout_info
.info
= info
;
5403 aout_info
.output_bfd
= abfd
;
5404 aout_info
.contents
= NULL
;
5405 aout_info
.relocs
= NULL
;
5406 aout_info
.symbol_map
= NULL
;
5407 aout_info
.output_syms
= NULL
;
5409 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
5410 aout_link_includes_newfunc
,
5411 sizeof (struct aout_link_includes_entry
),
5414 includes_hash_initialized
= TRUE
;
5416 /* Figure out the largest section size. Also, if generating
5417 relocatable output, count the relocs. */
5420 max_contents_size
= 0;
5421 max_relocs_size
= 0;
5423 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5427 if (bfd_link_relocatable (info
))
5429 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5431 trsize
+= exec_hdr (sub
)->a_trsize
;
5432 drsize
+= exec_hdr (sub
)->a_drsize
;
5436 /* FIXME: We need to identify the .text and .data sections
5437 and call get_reloc_upper_bound and canonicalize_reloc to
5438 work out the number of relocs needed, and then multiply
5439 by the reloc size. */
5441 /* xgettext:c-format */
5442 (_("%pB: relocatable link from %s to %s not supported"),
5443 abfd
, sub
->xvec
->name
, abfd
->xvec
->name
);
5444 bfd_set_error (bfd_error_invalid_operation
);
5449 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5451 sz
= obj_textsec (sub
)->size
;
5452 if (sz
> max_contents_size
)
5453 max_contents_size
= sz
;
5454 sz
= obj_datasec (sub
)->size
;
5455 if (sz
> max_contents_size
)
5456 max_contents_size
= sz
;
5458 sz
= exec_hdr (sub
)->a_trsize
;
5459 if (sz
> max_relocs_size
)
5460 max_relocs_size
= sz
;
5461 sz
= exec_hdr (sub
)->a_drsize
;
5462 if (sz
> max_relocs_size
)
5463 max_relocs_size
= sz
;
5465 sz
= obj_aout_external_sym_count (sub
);
5466 if (sz
> max_sym_count
)
5471 if (bfd_link_relocatable (info
))
5473 if (obj_textsec (abfd
) != NULL
)
5474 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
5475 ->map_head
.link_order
)
5476 * obj_reloc_entry_size (abfd
));
5477 if (obj_datasec (abfd
) != NULL
)
5478 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
5479 ->map_head
.link_order
)
5480 * obj_reloc_entry_size (abfd
));
5483 exec_hdr (abfd
)->a_trsize
= trsize
;
5484 exec_hdr (abfd
)->a_drsize
= drsize
;
5486 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
5488 /* Adjust the section sizes and vmas according to the magic number.
5489 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5490 filepos for each section. */
5491 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
5494 /* The relocation and symbol file positions differ among a.out
5495 targets. We are passed a callback routine from the backend
5496 specific code to handle this.
5497 FIXME: At this point we do not know how much space the symbol
5498 table will require. This will not work for any (nonstandard)
5499 a.out target that needs to know the symbol table size before it
5500 can compute the relocation file positions. This may or may not
5501 be the case for the hp300hpux target, for example. */
5502 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
5504 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
5505 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
5506 obj_sym_filepos (abfd
) = aout_info
.symoff
;
5508 /* We keep a count of the symbols as we output them. */
5509 obj_aout_external_sym_count (abfd
) = 0;
5511 /* We accumulate the string table as we write out the symbols. */
5512 aout_info
.strtab
= _bfd_stringtab_init ();
5513 if (aout_info
.strtab
== NULL
)
5516 /* Allocate buffers to hold section contents and relocs. */
5517 aout_info
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5518 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
5519 aout_info
.symbol_map
= (int *) bfd_malloc (max_sym_count
* sizeof (int));
5520 aout_info
.output_syms
= (struct external_nlist
*)
5521 bfd_malloc ((max_sym_count
+ 1) * sizeof (struct external_nlist
));
5522 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
5523 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
5524 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
5525 || aout_info
.output_syms
== NULL
)
5528 /* If we have a symbol named __DYNAMIC, force it out now. This is
5529 required by SunOS. Doing this here rather than in sunos.c is a
5530 hack, but it's easier than exporting everything which would be
5533 struct aout_link_hash_entry
*h
;
5535 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
5536 FALSE
, FALSE
, FALSE
);
5538 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
5541 /* The most time efficient way to do the link would be to read all
5542 the input object files into memory and then sort out the
5543 information into the output file. Unfortunately, that will
5544 probably use too much memory. Another method would be to step
5545 through everything that composes the text section and write it
5546 out, and then everything that composes the data section and write
5547 it out, and then write out the relocs, and then write out the
5548 symbols. Unfortunately, that requires reading stuff from each
5549 input file several times, and we will not be able to keep all the
5550 input files open simultaneously, and reopening them will be slow.
5552 What we do is basically process one input file at a time. We do
5553 everything we need to do with an input file once--copy over the
5554 section contents, handle the relocation information, and write
5555 out the symbols--and then we throw away the information we read
5556 from it. This approach requires a lot of lseeks of the output
5557 file, which is unfortunate but still faster than reopening a lot
5560 We use the output_has_begun field of the input BFDs to see
5561 whether we have already handled it. */
5562 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5563 sub
->output_has_begun
= FALSE
;
5565 /* Mark all sections which are to be included in the link. This
5566 will normally be every section. We need to do this so that we
5567 can identify any sections which the linker has decided to not
5569 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5571 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5572 if (p
->type
== bfd_indirect_link_order
)
5573 p
->u
.indirect
.section
->linker_mark
= TRUE
;
5576 have_link_order_relocs
= FALSE
;
5577 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5579 for (p
= o
->map_head
.link_order
;
5583 if (p
->type
== bfd_indirect_link_order
5584 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
5585 == bfd_target_aout_flavour
))
5589 input_bfd
= p
->u
.indirect
.section
->owner
;
5590 if (! input_bfd
->output_has_begun
)
5592 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
5594 input_bfd
->output_has_begun
= TRUE
;
5597 else if (p
->type
== bfd_section_reloc_link_order
5598 || p
->type
== bfd_symbol_reloc_link_order
)
5600 /* These are handled below. */
5601 have_link_order_relocs
= TRUE
;
5605 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5611 /* Write out any symbols that we have not already written out. */
5612 bfd_hash_traverse (&info
->hash
->table
,
5613 aout_link_write_other_symbol
,
5616 /* Now handle any relocs we were asked to create by the linker.
5617 These did not come from any input file. We must do these after
5618 we have written out all the symbols, so that we know the symbol
5620 if (have_link_order_relocs
)
5622 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5624 for (p
= o
->map_head
.link_order
;
5628 if (p
->type
== bfd_section_reloc_link_order
5629 || p
->type
== bfd_symbol_reloc_link_order
)
5631 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
5638 if (aout_info
.contents
!= NULL
)
5640 free (aout_info
.contents
);
5641 aout_info
.contents
= NULL
;
5643 if (aout_info
.relocs
!= NULL
)
5645 free (aout_info
.relocs
);
5646 aout_info
.relocs
= NULL
;
5648 if (aout_info
.symbol_map
!= NULL
)
5650 free (aout_info
.symbol_map
);
5651 aout_info
.symbol_map
= NULL
;
5653 if (aout_info
.output_syms
!= NULL
)
5655 free (aout_info
.output_syms
);
5656 aout_info
.output_syms
= NULL
;
5658 if (includes_hash_initialized
)
5660 bfd_hash_table_free (&aout_info
.includes
.root
);
5661 includes_hash_initialized
= FALSE
;
5664 /* Finish up any dynamic linking we may be doing. */
5665 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
5667 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
5671 /* Update the header information. */
5672 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
5673 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
5674 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
5675 obj_textsec (abfd
)->reloc_count
=
5676 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
5677 obj_datasec (abfd
)->reloc_count
=
5678 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
5680 /* Write out the string table, unless there are no symbols. */
5681 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
5683 if (abfd
->symcount
> 0)
5685 if (!emit_stringtab (abfd
, aout_info
.strtab
))
5690 bfd_byte b
[BYTES_IN_WORD
];
5692 memset (b
, 0, BYTES_IN_WORD
);
5693 if (bfd_bwrite (b
, (bfd_size_type
) BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
5700 if (aout_info
.contents
!= NULL
)
5701 free (aout_info
.contents
);
5702 if (aout_info
.relocs
!= NULL
)
5703 free (aout_info
.relocs
);
5704 if (aout_info
.symbol_map
!= NULL
)
5705 free (aout_info
.symbol_map
);
5706 if (aout_info
.output_syms
!= NULL
)
5707 free (aout_info
.output_syms
);
5708 if (includes_hash_initialized
)
5709 bfd_hash_table_free (&aout_info
.includes
.root
);