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, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sparc_aout_sunos_be_vec
72 requires all the names from @file{aout32.c}, and produces the jump vector
74 | sparc_aout_sunos_be_vec
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
86 When porting it to run on a new system, you must supply:
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected. */
110 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
111 Doesn't matter what the setting of WP_TEXT is on output, but it'll
113 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
114 * Any BFD with both flags clear is OMAGIC.
115 (Just want to make these explicit, so the conditions tested in this
116 file make sense if you're more familiar with a.out than with BFD.) */
118 #define KEEPIT udata.i
122 #include "safe-ctype.h"
127 #include "aout/aout64.h"
128 #include "aout/stab_gnu.h"
136 The file @file{aoutx.h} provides for both the @emph{standard}
137 and @emph{extended} forms of a.out relocation records.
139 The standard records contain only an
140 address, a symbol index, and a type field. The extended records
141 (used on 29ks and sparcs) also have a full integer for an
144 #ifndef CTOR_TABLE_RELOC_HOWTO
145 #define CTOR_TABLE_RELOC_IDX 2
146 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
147 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
148 ? howto_table_ext : howto_table_std) \
149 + CTOR_TABLE_RELOC_IDX)
152 #ifndef MY_swap_std_reloc_in
153 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
156 #ifndef MY_swap_ext_reloc_in
157 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
160 #ifndef MY_swap_std_reloc_out
161 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
164 #ifndef MY_swap_ext_reloc_out
165 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
168 #ifndef MY_final_link_relocate
169 #define MY_final_link_relocate _bfd_final_link_relocate
172 #ifndef MY_relocate_contents
173 #define MY_relocate_contents _bfd_relocate_contents
176 #define howto_table_ext NAME (aout, ext_howto_table)
177 #define howto_table_std NAME (aout, std_howto_table)
179 reloc_howto_type howto_table_ext
[] =
181 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
182 HOWTO (RELOC_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
, 0, "8", FALSE
, 0, 0x000000ff, FALSE
),
183 HOWTO (RELOC_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
, 0, "16", FALSE
, 0, 0x0000ffff, FALSE
),
184 HOWTO (RELOC_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "32", FALSE
, 0, 0xffffffff, FALSE
),
185 HOWTO (RELOC_DISP8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0, "DISP8", FALSE
, 0, 0x000000ff, FALSE
),
186 HOWTO (RELOC_DISP16
, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0, "DISP16", FALSE
, 0, 0x0000ffff, FALSE
),
187 HOWTO (RELOC_DISP32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0, "DISP32", FALSE
, 0, 0xffffffff, FALSE
),
188 HOWTO (RELOC_WDISP30
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "WDISP30", FALSE
, 0, 0x3fffffff, FALSE
),
189 HOWTO (RELOC_WDISP22
, 2, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "WDISP22", FALSE
, 0, 0x003fffff, FALSE
),
190 HOWTO (RELOC_HI22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "HI22", FALSE
, 0, 0x003fffff, FALSE
),
191 HOWTO (RELOC_22
, 0, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "22", FALSE
, 0, 0x003fffff, FALSE
),
192 HOWTO (RELOC_13
, 0, 2, 13, FALSE
, 0, complain_overflow_bitfield
, 0, "13", FALSE
, 0, 0x00001fff, FALSE
),
193 HOWTO (RELOC_LO10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "LO10", FALSE
, 0, 0x000003ff, FALSE
),
194 HOWTO (RELOC_SFA_BASE
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_BASE", FALSE
, 0, 0xffffffff, FALSE
),
195 HOWTO (RELOC_SFA_OFF13
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_OFF13", FALSE
, 0, 0xffffffff, FALSE
),
196 HOWTO (RELOC_BASE10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "BASE10", FALSE
, 0, 0x000003ff, FALSE
),
197 HOWTO (RELOC_BASE13
, 0, 2, 13, FALSE
, 0, complain_overflow_signed
, 0, "BASE13", FALSE
, 0, 0x00001fff, FALSE
),
198 HOWTO (RELOC_BASE22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "BASE22", FALSE
, 0, 0x003fffff, FALSE
),
199 HOWTO (RELOC_PC10
, 0, 2, 10, TRUE
, 0, complain_overflow_dont
, 0, "PC10", FALSE
, 0, 0x000003ff, TRUE
),
200 HOWTO (RELOC_PC22
, 10, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "PC22", FALSE
, 0, 0x003fffff, TRUE
),
201 HOWTO (RELOC_JMP_TBL
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "JMP_TBL", FALSE
, 0, 0x3fffffff, FALSE
),
202 HOWTO (RELOC_SEGOFF16
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "SEGOFF16", FALSE
, 0, 0x00000000, FALSE
),
203 HOWTO (RELOC_GLOB_DAT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "GLOB_DAT", FALSE
, 0, 0x00000000, FALSE
),
204 HOWTO (RELOC_JMP_SLOT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "JMP_SLOT", FALSE
, 0, 0x00000000, FALSE
),
205 HOWTO (RELOC_RELATIVE
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "RELATIVE", FALSE
, 0, 0x00000000, FALSE
),
206 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
207 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
208 #define RELOC_SPARC_REV32 RELOC_WDISP19
209 HOWTO (RELOC_SPARC_REV32
, 0, 2, 32, FALSE
, 0, complain_overflow_dont
, 0,"R_SPARC_REV32",FALSE
, 0, 0xffffffff, FALSE
),
212 /* Convert standard reloc records to "arelent" format (incl byte swap). */
214 reloc_howto_type howto_table_std
[] =
216 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
217 HOWTO ( 0, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,0,"8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
218 HOWTO ( 1, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
219 HOWTO ( 2, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
220 HOWTO ( 3, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,0,"64", TRUE
, 0xdeaddead,0xdeaddead, FALSE
),
221 HOWTO ( 4, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0,"DISP8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
222 HOWTO ( 5, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0,"DISP16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
223 HOWTO ( 6, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0,"DISP32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
224 HOWTO ( 7, 0, 4, 64, TRUE
, 0, complain_overflow_signed
, 0,"DISP64", TRUE
, 0xfeedface,0xfeedface, FALSE
),
225 HOWTO ( 8, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"GOT_REL", FALSE
, 0,0x00000000, FALSE
),
226 HOWTO ( 9, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"BASE16", FALSE
,0xffffffff,0xffffffff, FALSE
),
227 HOWTO (10, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"BASE32", FALSE
,0xffffffff,0xffffffff, FALSE
),
233 HOWTO (16, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"JMP_TABLE", FALSE
, 0,0x00000000, FALSE
),
249 HOWTO (32, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"RELATIVE", FALSE
, 0,0x00000000, FALSE
),
257 HOWTO (40, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"BASEREL", FALSE
, 0,0x00000000, FALSE
),
260 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
263 NAME (aout
, reloc_type_lookup
) (bfd
*abfd
, bfd_reloc_code_real_type code
)
265 #define EXT(i, j) case i: return & howto_table_ext [j]
266 #define STD(i, j) case i: return & howto_table_std [j]
267 int ext
= obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
;
269 if (code
== BFD_RELOC_CTOR
)
270 switch (bfd_arch_bits_per_address (abfd
))
283 EXT (BFD_RELOC_8
, 0);
284 EXT (BFD_RELOC_16
, 1);
285 EXT (BFD_RELOC_32
, 2);
286 EXT (BFD_RELOC_HI22
, 8);
287 EXT (BFD_RELOC_LO10
, 11);
288 EXT (BFD_RELOC_32_PCREL_S2
, 6);
289 EXT (BFD_RELOC_SPARC_WDISP22
, 7);
290 EXT (BFD_RELOC_SPARC13
, 10);
291 EXT (BFD_RELOC_SPARC_GOT10
, 14);
292 EXT (BFD_RELOC_SPARC_BASE13
, 15);
293 EXT (BFD_RELOC_SPARC_GOT13
, 15);
294 EXT (BFD_RELOC_SPARC_GOT22
, 16);
295 EXT (BFD_RELOC_SPARC_PC10
, 17);
296 EXT (BFD_RELOC_SPARC_PC22
, 18);
297 EXT (BFD_RELOC_SPARC_WPLT30
, 19);
298 EXT (BFD_RELOC_SPARC_REV32
, 26);
306 STD (BFD_RELOC_8
, 0);
307 STD (BFD_RELOC_16
, 1);
308 STD (BFD_RELOC_32
, 2);
309 STD (BFD_RELOC_8_PCREL
, 4);
310 STD (BFD_RELOC_16_PCREL
, 5);
311 STD (BFD_RELOC_32_PCREL
, 6);
312 STD (BFD_RELOC_16_BASEREL
, 9);
313 STD (BFD_RELOC_32_BASEREL
, 10);
320 NAME (aout
, reloc_name_lookup
) (bfd
*abfd
, const char *r_name
)
322 unsigned int i
, size
;
323 reloc_howto_type
*howto_table
;
325 if (obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
)
327 howto_table
= howto_table_ext
;
328 size
= sizeof (howto_table_ext
) / sizeof (howto_table_ext
[0]);
332 howto_table
= howto_table_std
;
333 size
= sizeof (howto_table_std
) / sizeof (howto_table_std
[0]);
336 for (i
= 0; i
< size
; i
++)
337 if (howto_table
[i
].name
!= NULL
338 && strcasecmp (howto_table
[i
].name
, r_name
) == 0)
339 return &howto_table
[i
];
346 Internal entry points
349 @file{aoutx.h} exports several routines for accessing the
350 contents of an a.out file, which are gathered and exported in
351 turn by various format specific files (eg sunos.c).
356 aout_@var{size}_swap_exec_header_in
359 void aout_@var{size}_swap_exec_header_in,
361 struct external_exec *bytes,
362 struct internal_exec *execp);
365 Swap the information in an executable header @var{raw_bytes} taken
366 from a raw byte stream memory image into the internal exec header
367 structure @var{execp}.
370 #ifndef NAME_swap_exec_header_in
372 NAME (aout
, swap_exec_header_in
) (bfd
*abfd
,
373 struct external_exec
*bytes
,
374 struct internal_exec
*execp
)
376 /* The internal_exec structure has some fields that are unused in this
377 configuration (IE for i960), so ensure that all such uninitialized
378 fields are zero'd out. There are places where two of these structs
379 are memcmp'd, and thus the contents do matter. */
380 memset ((void *) execp
, 0, sizeof (struct internal_exec
));
381 /* Now fill in fields in the execp, from the bytes in the raw data. */
382 execp
->a_info
= H_GET_32 (abfd
, bytes
->e_info
);
383 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
384 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
385 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
386 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
387 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
388 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
389 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
391 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
396 aout_@var{size}_swap_exec_header_out
399 void aout_@var{size}_swap_exec_header_out
401 struct internal_exec *execp,
402 struct external_exec *raw_bytes);
405 Swap the information in an internal exec header structure
406 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
409 NAME (aout
, swap_exec_header_out
) (bfd
*abfd
,
410 struct internal_exec
*execp
,
411 struct external_exec
*bytes
)
413 /* Now fill in fields in the raw data, from the fields in the exec struct. */
414 H_PUT_32 (abfd
, execp
->a_info
, bytes
->e_info
);
415 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
416 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
417 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
418 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
419 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
420 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
421 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
424 /* Make all the section for an a.out file. */
427 NAME (aout
, make_sections
) (bfd
*abfd
)
429 if (obj_textsec (abfd
) == NULL
&& bfd_make_section (abfd
, ".text") == NULL
)
431 if (obj_datasec (abfd
) == NULL
&& bfd_make_section (abfd
, ".data") == NULL
)
433 if (obj_bsssec (abfd
) == NULL
&& bfd_make_section (abfd
, ".bss") == NULL
)
440 aout_@var{size}_some_aout_object_p
443 const bfd_target *aout_@var{size}_some_aout_object_p
445 struct internal_exec *execp,
446 const bfd_target *(*callback_to_real_object_p) (bfd *));
449 Some a.out variant thinks that the file open in @var{abfd}
450 checking is an a.out file. Do some more checking, and set up
451 for access if it really is. Call back to the calling
452 environment's "finish up" function just before returning, to
453 handle any last-minute setup.
457 NAME (aout
, some_aout_object_p
) (bfd
*abfd
,
458 struct internal_exec
*execp
,
459 const bfd_target
*(*callback_to_real_object_p
) (bfd
*))
461 struct aout_data_struct
*rawptr
, *oldrawptr
;
462 const bfd_target
*result
;
463 bfd_size_type amt
= sizeof (* rawptr
);
465 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
469 oldrawptr
= abfd
->tdata
.aout_data
;
470 abfd
->tdata
.aout_data
= rawptr
;
472 /* Copy the contents of the old tdata struct.
473 In particular, we want the subformat, since for hpux it was set in
474 hp300hpux.c:swap_exec_header_in and will be used in
475 hp300hpux.c:callback. */
476 if (oldrawptr
!= NULL
)
477 *abfd
->tdata
.aout_data
= *oldrawptr
;
479 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
480 /* Copy in the internal_exec struct. */
481 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
;
482 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
484 /* Set the file flags. */
485 abfd
->flags
= BFD_NO_FLAGS
;
486 if (execp
->a_drsize
|| execp
->a_trsize
)
487 abfd
->flags
|= HAS_RELOC
;
488 /* Setting of EXEC_P has been deferred to the bottom of this function. */
490 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
491 if (N_DYNAMIC (execp
))
492 abfd
->flags
|= DYNAMIC
;
494 if (N_MAGIC (execp
) == ZMAGIC
)
496 abfd
->flags
|= D_PAGED
| WP_TEXT
;
497 adata (abfd
).magic
= z_magic
;
499 else if (N_MAGIC (execp
) == QMAGIC
)
501 abfd
->flags
|= D_PAGED
| WP_TEXT
;
502 adata (abfd
).magic
= z_magic
;
503 adata (abfd
).subformat
= q_magic_format
;
505 else if (N_MAGIC (execp
) == NMAGIC
)
507 abfd
->flags
|= WP_TEXT
;
508 adata (abfd
).magic
= n_magic
;
510 else if (N_MAGIC (execp
) == OMAGIC
511 || N_MAGIC (execp
) == BMAGIC
)
512 adata (abfd
).magic
= o_magic
;
514 /* Should have been checked with N_BADMAG before this routine
518 bfd_get_start_address (abfd
) = execp
->a_entry
;
520 obj_aout_symbols (abfd
) = NULL
;
521 bfd_get_symcount (abfd
) = execp
->a_syms
/ sizeof (struct external_nlist
);
523 /* The default relocation entry size is that of traditional V7 Unix. */
524 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
526 /* The default symbol entry size is that of traditional Unix. */
527 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
530 bfd_init_window (&obj_aout_sym_window (abfd
));
531 bfd_init_window (&obj_aout_string_window (abfd
));
533 obj_aout_external_syms (abfd
) = NULL
;
534 obj_aout_external_strings (abfd
) = NULL
;
535 obj_aout_sym_hashes (abfd
) = NULL
;
537 if (! NAME (aout
, make_sections
) (abfd
))
540 obj_datasec (abfd
)->size
= execp
->a_data
;
541 obj_bsssec (abfd
)->size
= execp
->a_bss
;
543 obj_textsec (abfd
)->flags
=
544 (execp
->a_trsize
!= 0
545 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
546 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
547 obj_datasec (abfd
)->flags
=
548 (execp
->a_drsize
!= 0
549 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
550 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
551 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
553 #ifdef THIS_IS_ONLY_DOCUMENTATION
554 /* The common code can't fill in these things because they depend
555 on either the start address of the text segment, the rounding
556 up of virtual addresses between segments, or the starting file
557 position of the text segment -- all of which varies among different
558 versions of a.out. */
560 /* Call back to the format-dependent code to fill in the rest of the
561 fields and do any further cleanup. Things that should be filled
562 in by the callback: */
564 struct exec
*execp
= exec_hdr (abfd
);
566 obj_textsec (abfd
)->size
= N_TXTSIZE (execp
);
567 /* Data and bss are already filled in since they're so standard. */
569 /* The virtual memory addresses of the sections. */
570 obj_textsec (abfd
)->vma
= N_TXTADDR (execp
);
571 obj_datasec (abfd
)->vma
= N_DATADDR (execp
);
572 obj_bsssec (abfd
)->vma
= N_BSSADDR (execp
);
574 /* The file offsets of the sections. */
575 obj_textsec (abfd
)->filepos
= N_TXTOFF (execp
);
576 obj_datasec (abfd
)->filepos
= N_DATOFF (execp
);
578 /* The file offsets of the relocation info. */
579 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF (execp
);
580 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF (execp
);
582 /* The file offsets of the string table and symbol table. */
583 obj_str_filepos (abfd
) = N_STROFF (execp
);
584 obj_sym_filepos (abfd
) = N_SYMOFF (execp
);
586 /* Determine the architecture and machine type of the object file. */
587 switch (N_MACHTYPE (exec_hdr (abfd
)))
590 abfd
->obj_arch
= bfd_arch_obscure
;
594 adata (abfd
)->page_size
= TARGET_PAGE_SIZE
;
595 adata (abfd
)->segment_size
= SEGMENT_SIZE
;
596 adata (abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
600 /* The architecture is encoded in various ways in various a.out variants,
601 or is not encoded at all in some of them. The relocation size depends
602 on the architecture and the a.out variant. Finally, the return value
603 is the bfd_target vector in use. If an error occurs, return zero and
604 set bfd_error to the appropriate error code.
606 Formats such as b.out, which have additional fields in the a.out
607 header, should cope with them in this callback as well. */
608 #endif /* DOCUMENTATION */
610 result
= (*callback_to_real_object_p
) (abfd
);
612 /* Now that the segment addresses have been worked out, take a better
613 guess at whether the file is executable. If the entry point
614 is within the text segment, assume it is. (This makes files
615 executable even if their entry point address is 0, as long as
616 their text starts at zero.).
618 This test had to be changed to deal with systems where the text segment
619 runs at a different location than the default. The problem is that the
620 entry address can appear to be outside the text segment, thus causing an
621 erroneous conclusion that the file isn't executable.
623 To fix this, we now accept any non-zero entry point as an indication of
624 executability. This will work most of the time, since only the linker
625 sets the entry point, and that is likely to be non-zero for most systems. */
627 if (execp
->a_entry
!= 0
628 || (execp
->a_entry
>= obj_textsec (abfd
)->vma
629 && execp
->a_entry
< (obj_textsec (abfd
)->vma
630 + obj_textsec (abfd
)->size
)
631 && execp
->a_trsize
== 0
632 && execp
->a_drsize
== 0))
633 abfd
->flags
|= EXEC_P
;
637 struct stat stat_buf
;
639 /* The original heuristic doesn't work in some important cases.
640 The a.out file has no information about the text start
641 address. For files (like kernels) linked to non-standard
642 addresses (ld -Ttext nnn) the entry point may not be between
643 the default text start (obj_textsec(abfd)->vma) and
644 (obj_textsec(abfd)->vma) + text size. This is not just a mach
645 issue. Many kernels are loaded at non standard addresses. */
646 if (abfd
->iostream
!= NULL
647 && (abfd
->flags
& BFD_IN_MEMORY
) == 0
648 && (fstat (fileno ((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
649 && ((stat_buf
.st_mode
& 0111) != 0))
650 abfd
->flags
|= EXEC_P
;
652 #endif /* STAT_FOR_EXEC */
658 bfd_release (abfd
, rawptr
);
659 abfd
->tdata
.aout_data
= oldrawptr
;
665 aout_@var{size}_mkobject
668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
671 Initialize BFD @var{abfd} for use with a.out files.
675 NAME (aout
, mkobject
) (bfd
*abfd
)
677 struct aout_data_struct
*rawptr
;
678 bfd_size_type amt
= sizeof (* rawptr
);
680 bfd_set_error (bfd_error_system_call
);
682 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
686 abfd
->tdata
.aout_data
= rawptr
;
687 exec_hdr (abfd
) = &(rawptr
->e
);
689 obj_textsec (abfd
) = NULL
;
690 obj_datasec (abfd
) = NULL
;
691 obj_bsssec (abfd
) = NULL
;
698 aout_@var{size}_machine_type
701 enum machine_type aout_@var{size}_machine_type
702 (enum bfd_architecture arch,
703 unsigned long machine,
704 bfd_boolean *unknown);
707 Keep track of machine architecture and machine type for
708 a.out's. Return the <<machine_type>> for a particular
709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
710 and machine can't be represented in a.out format.
712 If the architecture is understood, machine type 0 (default)
713 is always understood.
717 NAME (aout
, machine_type
) (enum bfd_architecture arch
,
718 unsigned long machine
,
719 bfd_boolean
*unknown
)
721 enum machine_type arch_flags
;
723 arch_flags
= M_UNKNOWN
;
730 || machine
== bfd_mach_sparc
731 || machine
== bfd_mach_sparc_sparclite
732 || machine
== bfd_mach_sparc_sparclite_le
733 || machine
== bfd_mach_sparc_v8plus
734 || machine
== bfd_mach_sparc_v8plusa
735 || machine
== bfd_mach_sparc_v8plusb
736 || machine
== bfd_mach_sparc_v8plusc
737 || machine
== bfd_mach_sparc_v8plusd
738 || machine
== bfd_mach_sparc_v8pluse
739 || machine
== bfd_mach_sparc_v8plusv
740 || machine
== bfd_mach_sparc_v8plusm
741 || machine
== bfd_mach_sparc_v8plusm8
742 || machine
== bfd_mach_sparc_v9
743 || machine
== bfd_mach_sparc_v9a
744 || machine
== bfd_mach_sparc_v9b
745 || machine
== bfd_mach_sparc_v9c
746 || machine
== bfd_mach_sparc_v9d
747 || machine
== bfd_mach_sparc_v9e
748 || machine
== bfd_mach_sparc_v9v
749 || machine
== bfd_mach_sparc_v9m
750 || machine
== bfd_mach_sparc_v9m8
)
751 arch_flags
= M_SPARC
;
752 else if (machine
== bfd_mach_sparc_sparclet
)
753 arch_flags
= M_SPARCLET
;
759 case 0: arch_flags
= M_68010
; break;
760 case bfd_mach_m68000
: arch_flags
= M_UNKNOWN
; *unknown
= FALSE
; break;
761 case bfd_mach_m68010
: arch_flags
= M_68010
; break;
762 case bfd_mach_m68020
: arch_flags
= M_68020
; break;
763 default: arch_flags
= M_UNKNOWN
; break;
769 || machine
== bfd_mach_i386_i386
770 || machine
== bfd_mach_i386_i386_intel_syntax
)
783 case bfd_mach_mips3000
:
784 case bfd_mach_mips3900
:
785 arch_flags
= M_MIPS1
;
787 case bfd_mach_mips6000
:
788 arch_flags
= M_MIPS2
;
790 case bfd_mach_mips4000
:
791 case bfd_mach_mips4010
:
792 case bfd_mach_mips4100
:
793 case bfd_mach_mips4300
:
794 case bfd_mach_mips4400
:
795 case bfd_mach_mips4600
:
796 case bfd_mach_mips4650
:
797 case bfd_mach_mips8000
:
798 case bfd_mach_mips9000
:
799 case bfd_mach_mips10000
:
800 case bfd_mach_mips12000
:
801 case bfd_mach_mips14000
:
802 case bfd_mach_mips16000
:
803 case bfd_mach_mips16
:
804 case bfd_mach_mipsisa32
:
805 case bfd_mach_mipsisa32r2
:
806 case bfd_mach_mipsisa32r3
:
807 case bfd_mach_mipsisa32r5
:
808 case bfd_mach_mipsisa32r6
:
810 case bfd_mach_mipsisa64
:
811 case bfd_mach_mipsisa64r2
:
812 case bfd_mach_mipsisa64r3
:
813 case bfd_mach_mipsisa64r5
:
814 case bfd_mach_mipsisa64r6
:
815 case bfd_mach_mips_sb1
:
816 case bfd_mach_mips_xlr
:
817 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
818 arch_flags
= M_MIPS2
;
821 arch_flags
= M_UNKNOWN
;
829 case 0: arch_flags
= M_NS32532
; break;
830 case 32032: arch_flags
= M_NS32032
; break;
831 case 32532: arch_flags
= M_NS32532
; break;
832 default: arch_flags
= M_UNKNOWN
; break;
841 if (machine
== 0 || machine
== 255)
850 arch_flags
= M_UNKNOWN
;
853 if (arch_flags
!= M_UNKNOWN
)
861 aout_@var{size}_set_arch_mach
864 bfd_boolean aout_@var{size}_set_arch_mach,
866 enum bfd_architecture arch,
867 unsigned long machine);
870 Set the architecture and the machine of the BFD @var{abfd} to the
871 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
872 can support the architecture required.
876 NAME (aout
, set_arch_mach
) (bfd
*abfd
,
877 enum bfd_architecture arch
,
878 unsigned long machine
)
880 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
883 if (arch
!= bfd_arch_unknown
)
887 NAME (aout
, machine_type
) (arch
, machine
, &unknown
);
892 /* Determine the size of a relocation entry. */
897 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
900 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
904 return (*aout_backend_info (abfd
)->set_sizes
) (abfd
);
908 adjust_o_magic (bfd
*abfd
, struct internal_exec
*execp
)
910 file_ptr pos
= adata (abfd
).exec_bytes_size
;
915 obj_textsec (abfd
)->filepos
= pos
;
916 if (!obj_textsec (abfd
)->user_set_vma
)
917 obj_textsec (abfd
)->vma
= vma
;
919 vma
= obj_textsec (abfd
)->vma
;
921 pos
+= obj_textsec (abfd
)->size
;
922 vma
+= obj_textsec (abfd
)->size
;
925 if (!obj_datasec (abfd
)->user_set_vma
)
927 obj_textsec (abfd
)->size
+= pad
;
930 obj_datasec (abfd
)->vma
= vma
;
933 vma
= obj_datasec (abfd
)->vma
;
934 obj_datasec (abfd
)->filepos
= pos
;
935 pos
+= obj_datasec (abfd
)->size
;
936 vma
+= obj_datasec (abfd
)->size
;
939 if (!obj_bsssec (abfd
)->user_set_vma
)
941 obj_datasec (abfd
)->size
+= pad
;
944 obj_bsssec (abfd
)->vma
= vma
;
948 /* The VMA of the .bss section is set by the VMA of the
949 .data section plus the size of the .data section. We may
950 need to add padding bytes to make this true. */
951 pad
= obj_bsssec (abfd
)->vma
- vma
;
954 obj_datasec (abfd
)->size
+= pad
;
958 obj_bsssec (abfd
)->filepos
= pos
;
960 /* Fix up the exec header. */
961 execp
->a_text
= obj_textsec (abfd
)->size
;
962 execp
->a_data
= obj_datasec (abfd
)->size
;
963 execp
->a_bss
= obj_bsssec (abfd
)->size
;
964 N_SET_MAGIC (execp
, OMAGIC
);
968 adjust_z_magic (bfd
*abfd
, struct internal_exec
*execp
)
970 bfd_size_type data_pad
, text_pad
;
972 const struct aout_backend_data
*abdp
;
973 /* TRUE if text includes exec header. */
976 abdp
= aout_backend_info (abfd
);
980 && (abdp
->text_includes_header
981 || obj_aout_subformat (abfd
) == q_magic_format
));
982 obj_textsec (abfd
)->filepos
= (ztih
983 ? adata (abfd
).exec_bytes_size
984 : adata (abfd
).zmagic_disk_block_size
);
985 if (! obj_textsec (abfd
)->user_set_vma
)
987 /* ?? Do we really need to check for relocs here? */
988 obj_textsec (abfd
)->vma
= ((abfd
->flags
& HAS_RELOC
)
991 ? (abdp
->default_text_vma
992 + adata (abfd
).exec_bytes_size
)
993 : abdp
->default_text_vma
));
998 /* The .text section is being loaded at an unusual address. We
999 may need to pad it such that the .data section starts at a page
1002 text_pad
= ((obj_textsec (abfd
)->filepos
- obj_textsec (abfd
)->vma
)
1003 & (adata (abfd
).page_size
- 1));
1005 text_pad
= ((- obj_textsec (abfd
)->vma
)
1006 & (adata (abfd
).page_size
- 1));
1009 /* Find start of data. */
1012 text_end
= obj_textsec (abfd
)->filepos
+ obj_textsec (abfd
)->size
;
1013 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1017 /* Note that if page_size == zmagic_disk_block_size, then
1018 filepos == page_size, and this case is the same as the ztih
1020 text_end
= obj_textsec (abfd
)->size
;
1021 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1022 text_end
+= obj_textsec (abfd
)->filepos
;
1024 obj_textsec (abfd
)->size
+= text_pad
;
1025 text_end
+= text_pad
;
1028 if (!obj_datasec (abfd
)->user_set_vma
)
1031 vma
= obj_textsec (abfd
)->vma
+ obj_textsec (abfd
)->size
;
1032 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1034 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
1036 asection
* text
= obj_textsec (abfd
);
1037 asection
* data
= obj_datasec (abfd
);
1039 text_pad
= data
->vma
- (text
->vma
+ text
->size
);
1040 /* Only pad the text section if the data
1041 section is going to be placed after it. */
1043 text
->size
+= text_pad
;
1045 obj_datasec (abfd
)->filepos
= (obj_textsec (abfd
)->filepos
1046 + obj_textsec (abfd
)->size
);
1048 /* Fix up exec header while we're at it. */
1049 execp
->a_text
= obj_textsec (abfd
)->size
;
1050 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
1051 execp
->a_text
+= adata (abfd
).exec_bytes_size
;
1052 if (obj_aout_subformat (abfd
) == q_magic_format
)
1053 N_SET_MAGIC (execp
, QMAGIC
);
1055 N_SET_MAGIC (execp
, ZMAGIC
);
1057 /* Spec says data section should be rounded up to page boundary. */
1058 obj_datasec (abfd
)->size
1059 = align_power (obj_datasec (abfd
)->size
,
1060 obj_bsssec (abfd
)->alignment_power
);
1061 execp
->a_data
= BFD_ALIGN (obj_datasec (abfd
)->size
,
1062 adata (abfd
).page_size
);
1063 data_pad
= execp
->a_data
- obj_datasec (abfd
)->size
;
1066 if (!obj_bsssec (abfd
)->user_set_vma
)
1067 obj_bsssec (abfd
)->vma
= (obj_datasec (abfd
)->vma
1068 + obj_datasec (abfd
)->size
);
1069 /* If the BSS immediately follows the data section and extra space
1070 in the page is left after the data section, fudge data
1071 in the header so that the bss section looks smaller by that
1072 amount. We'll start the bss section there, and lie to the OS.
1073 (Note that a linker script, as well as the above assignment,
1074 could have explicitly set the BSS vma to immediately follow
1075 the data section.) */
1076 if (align_power (obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->alignment_power
)
1077 == obj_datasec (abfd
)->vma
+ obj_datasec (abfd
)->size
)
1078 execp
->a_bss
= (data_pad
> obj_bsssec (abfd
)->size
1079 ? 0 : obj_bsssec (abfd
)->size
- data_pad
);
1081 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1085 adjust_n_magic (bfd
*abfd
, struct internal_exec
*execp
)
1087 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1092 obj_textsec (abfd
)->filepos
= pos
;
1093 if (!obj_textsec (abfd
)->user_set_vma
)
1094 obj_textsec (abfd
)->vma
= vma
;
1096 vma
= obj_textsec (abfd
)->vma
;
1097 pos
+= obj_textsec (abfd
)->size
;
1098 vma
+= obj_textsec (abfd
)->size
;
1101 obj_datasec (abfd
)->filepos
= pos
;
1102 if (!obj_datasec (abfd
)->user_set_vma
)
1103 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1104 vma
= obj_datasec (abfd
)->vma
;
1106 /* Since BSS follows data immediately, see if it needs alignment. */
1107 vma
+= obj_datasec (abfd
)->size
;
1108 pad
= align_power (vma
, obj_bsssec (abfd
)->alignment_power
) - vma
;
1109 obj_datasec (abfd
)->size
+= pad
;
1110 pos
+= obj_datasec (abfd
)->size
;
1113 if (!obj_bsssec (abfd
)->user_set_vma
)
1114 obj_bsssec (abfd
)->vma
= vma
;
1116 vma
= obj_bsssec (abfd
)->vma
;
1118 /* Fix up exec header. */
1119 execp
->a_text
= obj_textsec (abfd
)->size
;
1120 execp
->a_data
= obj_datasec (abfd
)->size
;
1121 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1122 N_SET_MAGIC (execp
, NMAGIC
);
1126 NAME (aout
, adjust_sizes_and_vmas
) (bfd
*abfd
)
1128 struct internal_exec
*execp
= exec_hdr (abfd
);
1130 if (! NAME (aout
, make_sections
) (abfd
))
1133 if (adata (abfd
).magic
!= undecided_magic
)
1136 obj_textsec (abfd
)->size
=
1137 align_power (obj_textsec (abfd
)->size
,
1138 obj_textsec (abfd
)->alignment_power
);
1140 /* Rule (heuristic) for when to pad to a new page. Note that there
1141 are (at least) two ways demand-paged (ZMAGIC) files have been
1142 handled. Most Berkeley-based systems start the text segment at
1143 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1144 segment right after the exec header; the latter is counted in the
1145 text segment size, and is paged in by the kernel with the rest of
1148 /* This perhaps isn't the right way to do this, but made it simpler for me
1149 to understand enough to implement it. Better would probably be to go
1150 right from BFD flags to alignment/positioning characteristics. But the
1151 old code was sloppy enough about handling the flags, and had enough
1152 other magic, that it was a little hard for me to understand. I think
1153 I understand it better now, but I haven't time to do the cleanup this
1156 if (abfd
->flags
& D_PAGED
)
1157 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1158 adata (abfd
).magic
= z_magic
;
1159 else if (abfd
->flags
& WP_TEXT
)
1160 adata (abfd
).magic
= n_magic
;
1162 adata (abfd
).magic
= o_magic
;
1164 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1166 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1168 switch (adata (abfd
).magic
)
1170 case n_magic
: str
= "NMAGIC"; break;
1171 case o_magic
: str
= "OMAGIC"; break;
1172 case z_magic
: str
= "ZMAGIC"; break;
1177 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1178 obj_textsec (abfd
)->alignment_power
,
1179 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1180 obj_datasec (abfd
)->alignment_power
,
1181 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
,
1182 obj_bsssec (abfd
)->alignment_power
);
1186 switch (adata (abfd
).magic
)
1189 adjust_o_magic (abfd
, execp
);
1192 adjust_z_magic (abfd
, execp
);
1195 adjust_n_magic (abfd
, execp
);
1201 #ifdef BFD_AOUT_DEBUG
1202 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1203 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1204 obj_textsec (abfd
)->filepos
,
1205 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1206 obj_datasec (abfd
)->filepos
,
1207 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
);
1215 aout_@var{size}_new_section_hook
1218 bfd_boolean aout_@var{size}_new_section_hook,
1223 Called by the BFD in response to a @code{bfd_make_section}
1227 NAME (aout
, new_section_hook
) (bfd
*abfd
, asection
*newsect
)
1229 /* Align to double at least. */
1230 newsect
->alignment_power
= bfd_get_arch_info (abfd
)->section_align_power
;
1232 if (bfd_get_format (abfd
) == bfd_object
)
1234 if (obj_textsec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".text"))
1236 obj_textsec (abfd
)= newsect
;
1237 newsect
->target_index
= N_TEXT
;
1239 else if (obj_datasec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".data"))
1241 obj_datasec (abfd
) = newsect
;
1242 newsect
->target_index
= N_DATA
;
1244 else if (obj_bsssec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".bss"))
1246 obj_bsssec (abfd
) = newsect
;
1247 newsect
->target_index
= N_BSS
;
1251 /* We allow more than three sections internally. */
1252 return _bfd_generic_new_section_hook (abfd
, newsect
);
1256 NAME (aout
, set_section_contents
) (bfd
*abfd
,
1258 const void * location
,
1260 bfd_size_type count
)
1262 if (! abfd
->output_has_begun
)
1264 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
1268 if (section
== obj_bsssec (abfd
))
1270 bfd_set_error (bfd_error_no_contents
);
1274 if (section
!= obj_textsec (abfd
)
1275 && section
!= obj_datasec (abfd
))
1277 if (aout_section_merge_with_text_p (abfd
, section
))
1278 section
->filepos
= obj_textsec (abfd
)->filepos
+
1279 (section
->vma
- obj_textsec (abfd
)->vma
);
1283 /* xgettext:c-format */
1284 (_("%pB: can not represent section `%pA' in a.out object file format"),
1286 bfd_set_error (bfd_error_nonrepresentable_section
);
1293 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1294 || bfd_bwrite (location
, count
, abfd
) != count
)
1301 /* Read the external symbols from an a.out file. */
1304 aout_get_external_symbols (bfd
*abfd
)
1306 if (obj_aout_external_syms (abfd
) == NULL
)
1308 bfd_size_type count
;
1309 struct external_nlist
*syms
;
1310 bfd_size_type amt
= exec_hdr (abfd
)->a_syms
;
1312 count
= amt
/ EXTERNAL_NLIST_SIZE
;
1314 return TRUE
; /* Nothing to do. */
1317 if (! bfd_get_file_window (abfd
, obj_sym_filepos (abfd
), amt
,
1318 &obj_aout_sym_window (abfd
), TRUE
))
1320 syms
= (struct external_nlist
*) obj_aout_sym_window (abfd
).data
;
1322 /* We allocate using malloc to make the values easy to free
1323 later on. If we put them on the objalloc it might not be
1324 possible to free them. */
1325 syms
= (struct external_nlist
*) bfd_malloc (amt
);
1329 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1330 || bfd_bread (syms
, amt
, abfd
) != amt
)
1337 obj_aout_external_syms (abfd
) = syms
;
1338 obj_aout_external_sym_count (abfd
) = count
;
1341 if (obj_aout_external_strings (abfd
) == NULL
1342 && exec_hdr (abfd
)->a_syms
!= 0)
1344 unsigned char string_chars
[BYTES_IN_WORD
];
1345 bfd_size_type stringsize
;
1347 bfd_size_type amt
= BYTES_IN_WORD
;
1349 /* Get the size of the strings. */
1350 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1351 || bfd_bread ((void *) string_chars
, amt
, abfd
) != amt
)
1353 stringsize
= GET_WORD (abfd
, string_chars
);
1354 if (stringsize
== 0)
1356 else if (stringsize
< BYTES_IN_WORD
1357 || (size_t) stringsize
!= stringsize
)
1359 bfd_set_error (bfd_error_bad_value
);
1364 if (stringsize
>= BYTES_IN_WORD
)
1366 if (! bfd_get_file_window (abfd
, obj_str_filepos (abfd
), stringsize
,
1367 &obj_aout_string_window (abfd
), TRUE
))
1369 strings
= (char *) obj_aout_string_window (abfd
).data
;
1374 strings
= (char *) bfd_malloc (stringsize
);
1375 if (strings
== NULL
)
1378 if (stringsize
>= BYTES_IN_WORD
)
1380 /* Keep the string count in the buffer for convenience
1381 when indexing with e_strx. */
1382 amt
= stringsize
- BYTES_IN_WORD
;
1383 if (bfd_bread (strings
+ BYTES_IN_WORD
, amt
, abfd
) != amt
)
1390 /* Ensure that a zero index yields an empty string. */
1393 strings
[stringsize
- 1] = 0;
1395 obj_aout_external_strings (abfd
) = strings
;
1396 obj_aout_external_string_size (abfd
) = stringsize
;
1402 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1403 and symbol->value fields of CACHE_PTR will be set from the a.out
1404 nlist structure. This function is responsible for setting
1405 symbol->flags and symbol->section, and adjusting symbol->value. */
1408 translate_from_native_sym_flags (bfd
*abfd
, aout_symbol_type
*cache_ptr
)
1412 if ((cache_ptr
->type
& N_STAB
) != 0
1413 || cache_ptr
->type
== N_FN
)
1417 /* This is a debugging symbol. */
1418 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1420 /* Work out the symbol section. */
1421 switch (cache_ptr
->type
& N_TYPE
)
1425 sec
= obj_textsec (abfd
);
1428 sec
= obj_datasec (abfd
);
1431 sec
= obj_bsssec (abfd
);
1435 sec
= bfd_abs_section_ptr
;
1439 cache_ptr
->symbol
.section
= sec
;
1440 cache_ptr
->symbol
.value
-= sec
->vma
;
1445 /* Get the default visibility. This does not apply to all types, so
1446 we just hold it in a local variable to use if wanted. */
1447 if ((cache_ptr
->type
& N_EXT
) == 0)
1448 visible
= BSF_LOCAL
;
1450 visible
= BSF_GLOBAL
;
1452 switch (cache_ptr
->type
)
1455 case N_ABS
: case N_ABS
| N_EXT
:
1456 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1457 cache_ptr
->symbol
.flags
= visible
;
1460 case N_UNDF
| N_EXT
:
1461 if (cache_ptr
->symbol
.value
!= 0)
1463 /* This is a common symbol. */
1464 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1465 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1469 cache_ptr
->symbol
.flags
= 0;
1470 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1474 case N_TEXT
: case N_TEXT
| N_EXT
:
1475 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1476 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1477 cache_ptr
->symbol
.flags
= visible
;
1480 /* N_SETV symbols used to represent set vectors placed in the
1481 data section. They are no longer generated. Theoretically,
1482 it was possible to extract the entries and combine them with
1483 new ones, although I don't know if that was ever actually
1484 done. Unless that feature is restored, treat them as data
1486 case N_SETV
: case N_SETV
| N_EXT
:
1487 case N_DATA
: case N_DATA
| N_EXT
:
1488 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1489 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1490 cache_ptr
->symbol
.flags
= visible
;
1493 case N_BSS
: case N_BSS
| N_EXT
:
1494 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1495 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1496 cache_ptr
->symbol
.flags
= visible
;
1499 case N_SETA
: case N_SETA
| N_EXT
:
1500 case N_SETT
: case N_SETT
| N_EXT
:
1501 case N_SETD
: case N_SETD
| N_EXT
:
1502 case N_SETB
: case N_SETB
| N_EXT
:
1504 /* This code is no longer needed. It used to be used to make
1505 the linker handle set symbols, but they are now handled in
1506 the add_symbols routine instead. */
1507 switch (cache_ptr
->type
& N_TYPE
)
1510 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1513 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1516 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1519 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1523 cache_ptr
->symbol
.flags
|= BSF_CONSTRUCTOR
;
1528 /* This symbol is the text of a warning message. The next
1529 symbol is the symbol to associate the warning with. If a
1530 reference is made to that symbol, a warning is issued. */
1531 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_WARNING
;
1532 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1535 case N_INDR
: case N_INDR
| N_EXT
:
1536 /* An indirect symbol. This consists of two symbols in a row.
1537 The first symbol is the name of the indirection. The second
1538 symbol is the name of the target. A reference to the first
1539 symbol becomes a reference to the second. */
1540 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_INDIRECT
| visible
;
1541 cache_ptr
->symbol
.section
= bfd_ind_section_ptr
;
1545 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1546 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1550 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1551 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1555 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1556 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1557 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1561 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1562 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1563 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1567 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1568 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1569 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1576 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1579 translate_to_native_sym_flags (bfd
*abfd
,
1581 struct external_nlist
*sym_pointer
)
1583 bfd_vma value
= cache_ptr
->value
;
1587 /* Mask out any existing type bits in case copying from one section
1589 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1591 sec
= bfd_get_section (cache_ptr
);
1596 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1599 /* xgettext:c-format */
1600 (_("%pB: can not represent section for symbol `%s' in a.out "
1601 "object file format"),
1603 cache_ptr
->name
!= NULL
? cache_ptr
->name
: _("*unknown*"));
1604 bfd_set_error (bfd_error_nonrepresentable_section
);
1608 if (sec
->output_section
!= NULL
)
1610 off
= sec
->output_offset
;
1611 sec
= sec
->output_section
;
1614 if (bfd_is_abs_section (sec
))
1615 sym_pointer
->e_type
[0] |= N_ABS
;
1616 else if (sec
== obj_textsec (abfd
))
1617 sym_pointer
->e_type
[0] |= N_TEXT
;
1618 else if (sec
== obj_datasec (abfd
))
1619 sym_pointer
->e_type
[0] |= N_DATA
;
1620 else if (sec
== obj_bsssec (abfd
))
1621 sym_pointer
->e_type
[0] |= N_BSS
;
1622 else if (bfd_is_und_section (sec
))
1623 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1624 else if (bfd_is_ind_section (sec
))
1625 sym_pointer
->e_type
[0] = N_INDR
;
1626 else if (bfd_is_com_section (sec
))
1627 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1630 if (aout_section_merge_with_text_p (abfd
, sec
))
1631 sym_pointer
->e_type
[0] |= N_TEXT
;
1635 /* xgettext:c-format */
1636 (_("%pB: can not represent section `%pA' in a.out object file format"),
1638 bfd_set_error (bfd_error_nonrepresentable_section
);
1643 /* Turn the symbol from section relative to absolute again. */
1644 value
+= sec
->vma
+ off
;
1646 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1647 sym_pointer
->e_type
[0] = N_WARNING
;
1649 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1650 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1651 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1652 sym_pointer
->e_type
[0] |= N_EXT
;
1653 else if ((cache_ptr
->flags
& BSF_LOCAL
) != 0)
1654 sym_pointer
->e_type
[0] &= ~N_EXT
;
1656 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1658 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1662 case N_ABS
: type
= N_SETA
; break;
1663 case N_TEXT
: type
= N_SETT
; break;
1664 case N_DATA
: type
= N_SETD
; break;
1665 case N_BSS
: type
= N_SETB
; break;
1667 sym_pointer
->e_type
[0] = type
;
1670 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1674 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1677 case N_ABS
: type
= N_WEAKA
; break;
1678 case N_TEXT
: type
= N_WEAKT
; break;
1679 case N_DATA
: type
= N_WEAKD
; break;
1680 case N_BSS
: type
= N_WEAKB
; break;
1681 case N_UNDF
: type
= N_WEAKU
; break;
1683 sym_pointer
->e_type
[0] = type
;
1686 PUT_WORD (abfd
, value
, sym_pointer
->e_value
);
1691 /* Native-level interface to symbols. */
1694 NAME (aout
, make_empty_symbol
) (bfd
*abfd
)
1696 bfd_size_type amt
= sizeof (aout_symbol_type
);
1698 aout_symbol_type
*new_symbol
= (aout_symbol_type
*) bfd_zalloc (abfd
, amt
);
1701 new_symbol
->symbol
.the_bfd
= abfd
;
1703 return &new_symbol
->symbol
;
1706 /* Translate a set of internal symbols into external symbols. */
1709 NAME (aout
, translate_symbol_table
) (bfd
*abfd
,
1710 aout_symbol_type
*in
,
1711 struct external_nlist
*ext
,
1712 bfd_size_type count
,
1714 bfd_size_type strsize
,
1715 bfd_boolean dynamic
)
1717 struct external_nlist
*ext_end
;
1719 ext_end
= ext
+ count
;
1720 for (; ext
< ext_end
; ext
++, in
++)
1724 x
= GET_WORD (abfd
, ext
->e_strx
);
1725 in
->symbol
.the_bfd
= abfd
;
1727 /* For the normal symbols, the zero index points at the number
1728 of bytes in the string table but is to be interpreted as the
1729 null string. For the dynamic symbols, the number of bytes in
1730 the string table is stored in the __DYNAMIC structure and the
1731 zero index points at an actual string. */
1732 if (x
== 0 && ! dynamic
)
1733 in
->symbol
.name
= "";
1734 else if (x
< strsize
)
1735 in
->symbol
.name
= str
+ x
;
1739 (_("%pB: invalid string offset %" PRIu64
" >= %" PRIu64
),
1740 abfd
, (uint64_t) x
, (uint64_t) strsize
);
1741 bfd_set_error (bfd_error_bad_value
);
1745 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1746 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1747 in
->other
= H_GET_8 (abfd
, ext
->e_other
);
1748 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1749 in
->symbol
.udata
.p
= NULL
;
1751 if (! translate_from_native_sym_flags (abfd
, in
))
1755 in
->symbol
.flags
|= BSF_DYNAMIC
;
1761 /* We read the symbols into a buffer, which is discarded when this
1762 function exits. We read the strings into a buffer large enough to
1763 hold them all plus all the cached symbol entries. */
1766 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1768 struct external_nlist
*old_external_syms
;
1769 aout_symbol_type
*cached
;
1770 bfd_size_type cached_size
;
1772 /* If there's no work to be done, don't do any. */
1773 if (obj_aout_symbols (abfd
) != NULL
)
1776 old_external_syms
= obj_aout_external_syms (abfd
);
1778 if (! aout_get_external_symbols (abfd
))
1781 cached_size
= obj_aout_external_sym_count (abfd
);
1782 if (cached_size
== 0)
1783 return TRUE
; /* Nothing to do. */
1785 cached_size
*= sizeof (aout_symbol_type
);
1786 cached
= (aout_symbol_type
*) bfd_zmalloc (cached_size
);
1790 /* Convert from external symbol information to internal. */
1791 if (! (NAME (aout
, translate_symbol_table
)
1793 obj_aout_external_syms (abfd
),
1794 obj_aout_external_sym_count (abfd
),
1795 obj_aout_external_strings (abfd
),
1796 obj_aout_external_string_size (abfd
),
1803 bfd_get_symcount (abfd
) = obj_aout_external_sym_count (abfd
);
1805 obj_aout_symbols (abfd
) = cached
;
1807 /* It is very likely that anybody who calls this function will not
1808 want the external symbol information, so if it was allocated
1809 because of our call to aout_get_external_symbols, we free it up
1810 right away to save space. */
1811 if (old_external_syms
== NULL
1812 && obj_aout_external_syms (abfd
) != NULL
)
1815 bfd_free_window (&obj_aout_sym_window (abfd
));
1817 free (obj_aout_external_syms (abfd
));
1819 obj_aout_external_syms (abfd
) = NULL
;
1825 /* We use a hash table when writing out symbols so that we only write
1826 out a particular string once. This helps particularly when the
1827 linker writes out stabs debugging entries, because each different
1828 contributing object file tends to have many duplicate stabs
1831 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1832 if BFD_TRADITIONAL_FORMAT is set. */
1834 /* Get the index of a string in a strtab, adding it if it is not
1837 static inline bfd_size_type
1838 add_to_stringtab (bfd
*abfd
,
1839 struct bfd_strtab_hash
*tab
,
1844 bfd_size_type str_index
;
1846 /* An index of 0 always means the empty string. */
1847 if (str
== 0 || *str
== '\0')
1850 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1851 doesn't understand a hashed string table. */
1853 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1856 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1858 if (str_index
!= (bfd_size_type
) -1)
1859 /* Add BYTES_IN_WORD to the return value to account for the
1860 space taken up by the string table size. */
1861 str_index
+= BYTES_IN_WORD
;
1866 /* Write out a strtab. ABFD is already at the right location in the
1870 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1872 bfd_byte buffer
[BYTES_IN_WORD
];
1873 bfd_size_type amt
= BYTES_IN_WORD
;
1875 /* The string table starts with the size. */
1876 PUT_WORD (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_WORD
, buffer
);
1877 if (bfd_bwrite ((void *) buffer
, amt
, abfd
) != amt
)
1880 return _bfd_stringtab_emit (abfd
, tab
);
1884 NAME (aout
, write_syms
) (bfd
*abfd
)
1886 unsigned int count
;
1887 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1888 struct bfd_strtab_hash
*strtab
;
1890 strtab
= _bfd_stringtab_init ();
1894 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1896 asymbol
*g
= generic
[count
];
1898 struct external_nlist nsp
;
1901 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, FALSE
);
1902 if (indx
== (bfd_size_type
) -1)
1904 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1906 if (bfd_asymbol_flavour (g
) == abfd
->xvec
->flavour
)
1908 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1909 H_PUT_8 (abfd
, aout_symbol (g
)->other
, nsp
.e_other
);
1910 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1914 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1915 H_PUT_8 (abfd
, 0, nsp
.e_other
);
1916 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1919 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1922 amt
= EXTERNAL_NLIST_SIZE
;
1923 if (bfd_bwrite ((void *) &nsp
, amt
, abfd
) != amt
)
1926 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1927 here, at the end. */
1931 if (! emit_stringtab (abfd
, strtab
))
1934 _bfd_stringtab_free (strtab
);
1939 _bfd_stringtab_free (strtab
);
1944 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1946 unsigned int counter
= 0;
1947 aout_symbol_type
*symbase
;
1949 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1952 for (symbase
= obj_aout_symbols (abfd
);
1953 counter
++ < bfd_get_symcount (abfd
);
1955 *(location
++) = (asymbol
*) (symbase
++);
1957 return bfd_get_symcount (abfd
);
1960 /* Standard reloc stuff. */
1961 /* Output standard relocation information to a file in target byte order. */
1963 extern void NAME (aout
, swap_std_reloc_out
)
1964 (bfd
*, arelent
*, struct reloc_std_external
*);
1967 NAME (aout
, swap_std_reloc_out
) (bfd
*abfd
,
1969 struct reloc_std_external
*natptr
)
1972 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1974 unsigned int r_length
;
1976 int r_baserel
, r_jmptable
, r_relative
;
1977 asection
*output_section
= sym
->section
->output_section
;
1979 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
1981 BFD_ASSERT (g
->howto
!= NULL
);
1982 r_length
= g
->howto
->size
; /* Size as a power of two. */
1983 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1984 /* XXX This relies on relocs coming from a.out files. */
1985 r_baserel
= (g
->howto
->type
& 8) != 0;
1986 r_jmptable
= (g
->howto
->type
& 16) != 0;
1987 r_relative
= (g
->howto
->type
& 32) != 0;
1989 /* Name was clobbered by aout_write_syms to be symbol index. */
1991 /* If this relocation is relative to a symbol then set the
1992 r_index to the symbols index, and the r_extern bit.
1994 Absolute symbols can come in in two ways, either as an offset
1995 from the abs section, or as a symbol which has an abs value.
1996 check for that here. */
1998 if (bfd_is_com_section (output_section
)
1999 || bfd_is_abs_section (output_section
)
2000 || bfd_is_und_section (output_section
)
2001 /* PR gas/3041 a.out relocs against weak symbols
2002 must be treated as if they were against externs. */
2003 || (sym
->flags
& BSF_WEAK
))
2005 if (bfd_abs_section_ptr
->symbol
== sym
)
2007 /* Whoops, looked like an abs symbol, but is
2008 really an offset from the abs section. */
2014 /* Fill in symbol. */
2016 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2021 /* Just an ordinary section. */
2023 r_index
= output_section
->target_index
;
2026 /* Now the fun stuff. */
2027 if (bfd_header_big_endian (abfd
))
2029 natptr
->r_index
[0] = r_index
>> 16;
2030 natptr
->r_index
[1] = r_index
>> 8;
2031 natptr
->r_index
[2] = r_index
;
2032 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2033 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2034 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2035 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2036 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2037 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
2041 natptr
->r_index
[2] = r_index
>> 16;
2042 natptr
->r_index
[1] = r_index
>> 8;
2043 natptr
->r_index
[0] = r_index
;
2044 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2045 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2046 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2047 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2048 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2049 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
2053 /* Extended stuff. */
2054 /* Output extended relocation information to a file in target byte order. */
2056 extern void NAME (aout
, swap_ext_reloc_out
)
2057 (bfd
*, arelent
*, struct reloc_ext_external
*);
2060 NAME (aout
, swap_ext_reloc_out
) (bfd
*abfd
,
2062 struct reloc_ext_external
*natptr
)
2066 unsigned int r_type
;
2068 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2069 asection
*output_section
= sym
->section
->output_section
;
2071 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2073 r_type
= (unsigned int) g
->howto
->type
;
2075 r_addend
= g
->addend
;
2076 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2077 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2079 /* If this relocation is relative to a symbol then set the
2080 r_index to the symbols index, and the r_extern bit.
2082 Absolute symbols can come in in two ways, either as an offset
2083 from the abs section, or as a symbol which has an abs value.
2084 check for that here. */
2085 if (bfd_is_abs_section (bfd_get_section (sym
)))
2090 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2092 if (bfd_is_und_section (bfd_get_section (sym
))
2093 || (sym
->flags
& BSF_GLOBAL
) != 0)
2097 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2101 /* Just an ordinary section. */
2103 r_index
= output_section
->target_index
;
2106 /* Now the fun stuff. */
2107 if (bfd_header_big_endian (abfd
))
2109 natptr
->r_index
[0] = r_index
>> 16;
2110 natptr
->r_index
[1] = r_index
>> 8;
2111 natptr
->r_index
[2] = r_index
;
2112 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2113 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2117 natptr
->r_index
[2] = r_index
>> 16;
2118 natptr
->r_index
[1] = r_index
>> 8;
2119 natptr
->r_index
[0] = r_index
;
2120 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2121 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
));
2124 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2127 /* BFD deals internally with all things based from the section they're
2128 in. so, something in 10 bytes into a text section with a base of
2129 50 would have a symbol (.text+10) and know .text vma was 50.
2131 Aout keeps all it's symbols based from zero, so the symbol would
2132 contain 60. This macro subs the base of each section from the value
2133 to give the true offset from the section. */
2135 #define MOVE_ADDRESS(ad) \
2138 /* Undefined symbol. */ \
2139 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2140 cache_ptr->addend = ad; \
2144 /* Defined, section relative. Replace symbol with pointer to \
2145 symbol which points to section. */ \
2149 case N_TEXT | N_EXT: \
2150 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2151 cache_ptr->addend = ad - su->textsec->vma; \
2154 case N_DATA | N_EXT: \
2155 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2156 cache_ptr->addend = ad - su->datasec->vma; \
2159 case N_BSS | N_EXT: \
2160 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2161 cache_ptr->addend = ad - su->bsssec->vma; \
2165 case N_ABS | N_EXT: \
2166 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2167 cache_ptr->addend = ad; \
2173 NAME (aout
, swap_ext_reloc_in
) (bfd
*abfd
,
2174 struct reloc_ext_external
*bytes
,
2177 bfd_size_type symcount
)
2179 unsigned int r_index
;
2181 unsigned int r_type
;
2182 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2184 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2186 /* Now the fun stuff. */
2187 if (bfd_header_big_endian (abfd
))
2189 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2190 | ((unsigned int) bytes
->r_index
[1] << 8)
2191 | bytes
->r_index
[2]);
2192 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2193 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2194 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
2198 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2199 | ((unsigned int) bytes
->r_index
[1] << 8)
2200 | bytes
->r_index
[0]);
2201 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2202 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2203 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2206 if (r_type
< TABLE_SIZE (howto_table_ext
))
2207 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2209 cache_ptr
->howto
= NULL
;
2211 /* Base relative relocs are always against the symbol table,
2212 regardless of the setting of r_extern. r_extern just reflects
2213 whether the symbol the reloc is against is local or global. */
2214 if (r_type
== (unsigned int) RELOC_BASE10
2215 || r_type
== (unsigned int) RELOC_BASE13
2216 || r_type
== (unsigned int) RELOC_BASE22
)
2219 if (r_extern
&& r_index
> symcount
)
2221 /* We could arrange to return an error, but it might be useful
2222 to see the file even if it is bad. */
2227 MOVE_ADDRESS (GET_SWORD (abfd
, bytes
->r_addend
));
2231 NAME (aout
, swap_std_reloc_in
) (bfd
*abfd
,
2232 struct reloc_std_external
*bytes
,
2235 bfd_size_type symcount
)
2237 unsigned int r_index
;
2239 unsigned int r_length
;
2241 int r_baserel
, r_jmptable
, r_relative
;
2242 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2243 unsigned int howto_idx
;
2245 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
2247 /* Now the fun stuff. */
2248 if (bfd_header_big_endian (abfd
))
2250 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2251 | ((unsigned int) bytes
->r_index
[1] << 8)
2252 | bytes
->r_index
[2]);
2253 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2254 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2255 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2256 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2257 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2258 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2259 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
2263 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2264 | ((unsigned int) bytes
->r_index
[1] << 8)
2265 | bytes
->r_index
[0]);
2266 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2267 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2268 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2269 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2270 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2271 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2272 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2275 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2276 + 16 * r_jmptable
+ 32 * r_relative
);
2277 if (howto_idx
< TABLE_SIZE (howto_table_std
))
2279 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2280 if (cache_ptr
->howto
->type
== (unsigned int) -1)
2281 cache_ptr
->howto
= NULL
;
2284 cache_ptr
->howto
= NULL
;
2286 /* Base relative relocs are always against the symbol table,
2287 regardless of the setting of r_extern. r_extern just reflects
2288 whether the symbol the reloc is against is local or global. */
2292 if (r_extern
&& r_index
>= symcount
)
2294 /* We could arrange to return an error, but it might be useful
2295 to see the file even if it is bad. FIXME: Of course this
2296 means that objdump -r *doesn't* see the actual reloc, and
2297 objcopy silently writes a different reloc. */
2305 /* Read and swap the relocs for a section. */
2308 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
2310 bfd_size_type count
;
2311 bfd_size_type reloc_size
;
2313 arelent
*reloc_cache
;
2315 unsigned int counter
= 0;
2319 if (asect
->relocation
)
2322 if (asect
->flags
& SEC_CONSTRUCTOR
)
2325 if (asect
== obj_datasec (abfd
))
2326 reloc_size
= exec_hdr (abfd
)->a_drsize
;
2327 else if (asect
== obj_textsec (abfd
))
2328 reloc_size
= exec_hdr (abfd
)->a_trsize
;
2329 else if (asect
== obj_bsssec (abfd
))
2333 bfd_set_error (bfd_error_invalid_operation
);
2337 if (reloc_size
== 0)
2338 return TRUE
; /* Nothing to be done. */
2340 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2343 each_size
= obj_reloc_entry_size (abfd
);
2345 count
= reloc_size
/ each_size
;
2347 return TRUE
; /* Nothing to be done. */
2349 amt
= count
* sizeof (arelent
);
2350 reloc_cache
= (arelent
*) bfd_zmalloc (amt
);
2351 if (reloc_cache
== NULL
)
2354 relocs
= bfd_malloc (reloc_size
);
2361 if (bfd_bread (relocs
, reloc_size
, abfd
) != reloc_size
)
2368 cache_ptr
= reloc_cache
;
2369 if (each_size
== RELOC_EXT_SIZE
)
2371 struct reloc_ext_external
*rptr
= (struct reloc_ext_external
*) relocs
;
2373 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2374 MY_swap_ext_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2375 (bfd_size_type
) bfd_get_symcount (abfd
));
2379 struct reloc_std_external
*rptr
= (struct reloc_std_external
*) relocs
;
2381 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2382 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2383 (bfd_size_type
) bfd_get_symcount (abfd
));
2388 asect
->relocation
= reloc_cache
;
2389 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2394 /* Write out a relocation section into an object file. */
2397 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2400 unsigned char *native
, *natptr
;
2403 unsigned int count
= section
->reloc_count
;
2404 bfd_size_type natsize
;
2406 if (count
== 0 || section
->orelocation
== NULL
)
2409 each_size
= obj_reloc_entry_size (abfd
);
2410 natsize
= (bfd_size_type
) each_size
* count
;
2411 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2415 generic
= section
->orelocation
;
2417 if (each_size
== RELOC_EXT_SIZE
)
2419 for (natptr
= native
;
2421 --count
, natptr
+= each_size
, ++generic
)
2423 /* PR 20921: If the howto field has not been initialised then skip
2425 PR 20929: Similarly for the symbol field. */
2426 if ((*generic
)->howto
== NULL
2427 || (*generic
)->sym_ptr_ptr
== NULL
)
2429 bfd_set_error (bfd_error_invalid_operation
);
2430 _bfd_error_handler (_("\
2431 %pB: attempt to write out unknown reloc type"), abfd
);
2434 MY_swap_ext_reloc_out (abfd
, *generic
,
2435 (struct reloc_ext_external
*) natptr
);
2440 for (natptr
= native
;
2442 --count
, natptr
+= each_size
, ++generic
)
2444 if ((*generic
)->howto
== NULL
2445 || (*generic
)->sym_ptr_ptr
== NULL
)
2447 bfd_set_error (bfd_error_invalid_operation
);
2448 _bfd_error_handler (_("\
2449 %pB: attempt to write out unknown reloc type"), abfd
);
2452 MY_swap_std_reloc_out (abfd
, *generic
,
2453 (struct reloc_std_external
*) natptr
);
2457 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2459 bfd_release (abfd
, native
);
2462 bfd_release (abfd
, native
);
2467 /* This is stupid. This function should be a boolean predicate. */
2470 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2475 arelent
*tblptr
= section
->relocation
;
2478 if (section
== obj_bsssec (abfd
))
2484 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
) (abfd
, section
, symbols
)))
2487 if (section
->flags
& SEC_CONSTRUCTOR
)
2489 arelent_chain
*chain
= section
->constructor_chain
;
2490 for (count
= 0; count
< section
->reloc_count
; count
++)
2492 *relptr
++ = &chain
->relent
;
2493 chain
= chain
->next
;
2498 tblptr
= section
->relocation
;
2500 for (count
= 0; count
++ < section
->reloc_count
; )
2502 *relptr
++ = tblptr
++;
2507 return section
->reloc_count
;
2511 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2513 if (bfd_get_format (abfd
) != bfd_object
)
2515 bfd_set_error (bfd_error_invalid_operation
);
2519 if (asect
->flags
& SEC_CONSTRUCTOR
)
2520 return sizeof (arelent
*) * (asect
->reloc_count
+ 1);
2522 if (asect
== obj_datasec (abfd
))
2523 return sizeof (arelent
*)
2524 * ((exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
))
2527 if (asect
== obj_textsec (abfd
))
2528 return sizeof (arelent
*)
2529 * ((exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
))
2532 if (asect
== obj_bsssec (abfd
))
2533 return sizeof (arelent
*);
2535 if (asect
== obj_bsssec (abfd
))
2538 bfd_set_error (bfd_error_invalid_operation
);
2543 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2545 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2548 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2552 NAME (aout
, get_lineno
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2553 asymbol
*ignore_symbol ATTRIBUTE_UNUSED
)
2559 NAME (aout
, get_symbol_info
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2563 bfd_symbol_info (symbol
, ret
);
2565 if (ret
->type
== '?')
2567 int type_code
= aout_symbol (symbol
)->type
& 0xff;
2568 const char *stab_name
= bfd_get_stab_name (type_code
);
2569 static char buf
[10];
2571 if (stab_name
== NULL
)
2573 sprintf (buf
, "(%d)", type_code
);
2577 ret
->stab_type
= type_code
;
2578 ret
->stab_other
= (unsigned) (aout_symbol (symbol
)->other
& 0xff);
2579 ret
->stab_desc
= (unsigned) (aout_symbol (symbol
)->desc
& 0xffff);
2580 ret
->stab_name
= stab_name
;
2585 NAME (aout
, print_symbol
) (bfd
*abfd
,
2588 bfd_print_symbol_type how
)
2590 FILE *file
= (FILE *)afile
;
2594 case bfd_print_symbol_name
:
2596 fprintf (file
,"%s", symbol
->name
);
2598 case bfd_print_symbol_more
:
2599 fprintf (file
,"%4x %2x %2x",
2600 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2601 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2602 (unsigned) (aout_symbol (symbol
)->type
));
2604 case bfd_print_symbol_all
:
2606 const char *section_name
= symbol
->section
->name
;
2608 bfd_print_symbol_vandf (abfd
, (void *)file
, symbol
);
2610 fprintf (file
," %-5s %04x %02x %02x",
2612 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2613 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2614 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2616 fprintf (file
," %s", symbol
->name
);
2622 /* If we don't have to allocate more than 1MB to hold the generic
2623 symbols, we use the generic minisymbol methord: it's faster, since
2624 it only translates the symbols once, not multiple times. */
2625 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2627 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2628 symbols. The minisymbol_to_symbol function translates these into
2629 BFD asymbol structures. */
2632 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2633 bfd_boolean dynamic
,
2635 unsigned int *sizep
)
2638 /* We could handle the dynamic symbols here as well, but it's
2639 easier to hand them off. */
2640 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2642 if (! aout_get_external_symbols (abfd
))
2645 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2646 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2648 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2650 /* By passing the external symbols back from this routine, we are
2651 giving up control over the memory block. Clear
2652 obj_aout_external_syms, so that we do not try to free it
2654 obj_aout_external_syms (abfd
) = NULL
;
2656 *sizep
= EXTERNAL_NLIST_SIZE
;
2657 return obj_aout_external_sym_count (abfd
);
2660 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2661 unmodified a.out symbol. The SYM argument is a structure returned
2662 by bfd_make_empty_symbol, which we fill in here. */
2665 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2666 bfd_boolean dynamic
,
2667 const void * minisym
,
2671 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2672 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2674 memset (sym
, 0, sizeof (aout_symbol_type
));
2676 /* We call translate_symbol_table to translate a single symbol. */
2677 if (! (NAME (aout
, translate_symbol_table
)
2679 (aout_symbol_type
*) sym
,
2680 (struct external_nlist
*) minisym
,
2682 obj_aout_external_strings (abfd
),
2683 obj_aout_external_string_size (abfd
),
2690 /* Provided a BFD, a section and an offset into the section, calculate
2691 and return the name of the source file and the line nearest to the
2695 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2699 const char **filename_ptr
,
2700 const char **functionname_ptr
,
2701 unsigned int *line_ptr
,
2702 unsigned int *disriminator_ptr
)
2704 /* Run down the file looking for the filename, function and linenumber. */
2706 const char *directory_name
= NULL
;
2707 const char *main_file_name
= NULL
;
2708 const char *current_file_name
= NULL
;
2709 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2710 const char *line_directory_name
= NULL
; /* Value of directory_name at line number. */
2711 bfd_vma low_line_vma
= 0;
2712 bfd_vma low_func_vma
= 0;
2714 bfd_size_type filelen
, funclen
;
2717 *filename_ptr
= abfd
->filename
;
2718 *functionname_ptr
= NULL
;
2720 if (disriminator_ptr
)
2721 *disriminator_ptr
= 0;
2723 if (symbols
!= NULL
)
2725 for (p
= symbols
; *p
; p
++)
2727 aout_symbol_type
*q
= (aout_symbol_type
*) (*p
);
2732 /* If this looks like a file name symbol, and it comes after
2733 the line number we have found so far, but before the
2734 offset, then we have probably not found the right line
2736 if (q
->symbol
.value
<= offset
2737 && ((q
->symbol
.value
> low_line_vma
2738 && (line_file_name
!= NULL
2740 || (q
->symbol
.value
> low_func_vma
2743 const char *symname
;
2745 symname
= q
->symbol
.name
;
2746 if (strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2748 if (q
->symbol
.value
> low_line_vma
)
2751 line_file_name
= NULL
;
2753 if (q
->symbol
.value
> low_func_vma
)
2760 /* If this symbol is less than the offset, but greater than
2761 the line number we have found so far, then we have not
2762 found the right line number. */
2763 if (q
->symbol
.value
<= offset
)
2765 if (q
->symbol
.value
> low_line_vma
)
2768 line_file_name
= NULL
;
2770 if (q
->symbol
.value
> low_func_vma
)
2774 main_file_name
= current_file_name
= q
->symbol
.name
;
2775 /* Look ahead to next symbol to check if that too is an N_SO. */
2779 q
= (aout_symbol_type
*) (*p
);
2780 if (q
->type
!= (int)N_SO
)
2783 /* Found a second N_SO First is directory; second is filename. */
2784 directory_name
= current_file_name
;
2785 main_file_name
= current_file_name
= q
->symbol
.name
;
2786 if (obj_textsec (abfd
) != section
)
2790 current_file_name
= q
->symbol
.name
;
2797 /* We'll keep this if it resolves nearer than the one we have
2799 if (q
->symbol
.value
>= low_line_vma
2800 && q
->symbol
.value
<= offset
)
2802 *line_ptr
= q
->desc
;
2803 low_line_vma
= q
->symbol
.value
;
2804 line_file_name
= current_file_name
;
2805 line_directory_name
= directory_name
;
2810 /* We'll keep this if it is nearer than the one we have already. */
2811 if (q
->symbol
.value
>= low_func_vma
&&
2812 q
->symbol
.value
<= offset
)
2814 low_func_vma
= q
->symbol
.value
;
2815 func
= (asymbol
*)q
;
2817 else if (q
->symbol
.value
> offset
)
2828 main_file_name
= line_file_name
;
2829 directory_name
= line_directory_name
;
2832 if (main_file_name
== NULL
2833 || IS_ABSOLUTE_PATH (main_file_name
)
2834 || directory_name
== NULL
)
2837 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2842 funclen
= strlen (bfd_asymbol_name (func
));
2844 if (adata (abfd
).line_buf
!= NULL
)
2845 free (adata (abfd
).line_buf
);
2847 if (filelen
+ funclen
== 0)
2848 adata (abfd
).line_buf
= buf
= NULL
;
2851 buf
= (char *) bfd_malloc (filelen
+ funclen
+ 3);
2852 adata (abfd
).line_buf
= buf
;
2857 if (main_file_name
!= NULL
)
2859 if (IS_ABSOLUTE_PATH (main_file_name
) || directory_name
== NULL
)
2860 *filename_ptr
= main_file_name
;
2864 /* PR binutils/20891: In a corrupt input file both
2865 main_file_name and directory_name can be empty... */
2866 * filename_ptr
= NULL
;
2869 snprintf (buf
, filelen
+ 1, "%s%s", directory_name
,
2871 *filename_ptr
= buf
;
2879 const char *function
= func
->name
;
2884 /* PR binutils/20892: In a corrupt input file func can be empty. */
2885 * functionname_ptr
= NULL
;
2888 /* The caller expects a symbol name. We actually have a
2889 function name, without the leading underscore. Put the
2890 underscore back in, so that the caller gets a symbol name. */
2891 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2892 strcpy (buf
, function
);
2895 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2896 strcpy (buf
+ 1, function
);
2898 /* Have to remove : stuff. */
2899 colon
= strchr (buf
, ':');
2902 *functionname_ptr
= buf
;
2909 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2910 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2912 return adata (abfd
).exec_bytes_size
;
2915 /* Free all information we have cached for this BFD. We can always
2916 read it again later if we need it. */
2919 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2923 if (bfd_get_format (abfd
) != bfd_object
2924 || abfd
->tdata
.aout_data
== NULL
)
2927 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2928 BFCI_FREE (obj_aout_symbols (abfd
));
2930 obj_aout_external_syms (abfd
) = 0;
2931 bfd_free_window (&obj_aout_sym_window (abfd
));
2932 bfd_free_window (&obj_aout_string_window (abfd
));
2933 obj_aout_external_strings (abfd
) = 0;
2935 BFCI_FREE (obj_aout_external_syms (abfd
));
2936 BFCI_FREE (obj_aout_external_strings (abfd
));
2938 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2939 BFCI_FREE (o
->relocation
);
2945 /* a.out link code. */
2947 /* Routine to create an entry in an a.out link hash table. */
2949 struct bfd_hash_entry
*
2950 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2951 struct bfd_hash_table
*table
,
2954 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2956 /* Allocate the structure if it has not already been allocated by a
2959 ret
= (struct aout_link_hash_entry
*) bfd_hash_allocate (table
,
2964 /* Call the allocation method of the superclass. */
2965 ret
= ((struct aout_link_hash_entry
*)
2966 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2970 /* Set local fields. */
2971 ret
->written
= FALSE
;
2975 return (struct bfd_hash_entry
*) ret
;
2978 /* Initialize an a.out link hash table. */
2981 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2983 struct bfd_hash_entry
*(*newfunc
)
2984 (struct bfd_hash_entry
*, struct bfd_hash_table
*,
2986 unsigned int entsize
)
2988 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2991 /* Create an a.out link hash table. */
2993 struct bfd_link_hash_table
*
2994 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2996 struct aout_link_hash_table
*ret
;
2997 bfd_size_type amt
= sizeof (* ret
);
2999 ret
= (struct aout_link_hash_table
*) bfd_malloc (amt
);
3003 if (!NAME (aout
, link_hash_table_init
) (ret
, abfd
,
3004 NAME (aout
, link_hash_newfunc
),
3005 sizeof (struct aout_link_hash_entry
)))
3013 /* Add all symbols from an object file to the hash table. */
3016 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3018 bfd_boolean (*add_one_symbol
)
3019 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
3020 bfd_vma
, const char *, bfd_boolean
, bfd_boolean
,
3021 struct bfd_link_hash_entry
**);
3022 struct external_nlist
*syms
;
3023 bfd_size_type sym_count
;
3026 struct aout_link_hash_entry
**sym_hash
;
3027 struct external_nlist
*p
;
3028 struct external_nlist
*pend
;
3031 syms
= obj_aout_external_syms (abfd
);
3032 sym_count
= obj_aout_external_sym_count (abfd
);
3033 strings
= obj_aout_external_strings (abfd
);
3034 if (info
->keep_memory
)
3039 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
3041 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
3042 (abfd
, info
, &syms
, &sym_count
, &strings
)))
3047 return TRUE
; /* Nothing to do. */
3049 /* We keep a list of the linker hash table entries that correspond
3050 to particular symbols. We could just look them up in the hash
3051 table, but keeping the list is more efficient. Perhaps this
3052 should be conditional on info->keep_memory. */
3053 amt
= sym_count
* sizeof (struct aout_link_hash_entry
*);
3054 sym_hash
= (struct aout_link_hash_entry
**) bfd_alloc (abfd
, amt
);
3055 if (sym_hash
== NULL
)
3057 obj_aout_sym_hashes (abfd
) = sym_hash
;
3059 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
3060 if (add_one_symbol
== NULL
)
3061 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
3064 pend
= p
+ sym_count
;
3065 for (; p
< pend
; p
++, sym_hash
++)
3076 type
= H_GET_8 (abfd
, p
->e_type
);
3078 /* Ignore debugging symbols. */
3079 if ((type
& N_STAB
) != 0)
3082 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3083 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3085 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3086 value
= GET_WORD (abfd
, p
->e_value
);
3103 /* Ignore symbols that are not externally visible. */
3106 /* Ignore local indirect symbol. */
3111 case N_UNDF
| N_EXT
:
3114 section
= bfd_und_section_ptr
;
3118 section
= bfd_com_section_ptr
;
3121 section
= bfd_abs_section_ptr
;
3123 case N_TEXT
| N_EXT
:
3124 section
= obj_textsec (abfd
);
3125 value
-= bfd_get_section_vma (abfd
, section
);
3127 case N_DATA
| N_EXT
:
3128 case N_SETV
| N_EXT
:
3129 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3130 translate_from_native_sym_flags. */
3131 section
= obj_datasec (abfd
);
3132 value
-= bfd_get_section_vma (abfd
, section
);
3135 section
= obj_bsssec (abfd
);
3136 value
-= bfd_get_section_vma (abfd
, section
);
3138 case N_INDR
| N_EXT
:
3139 /* An indirect symbol. The next symbol is the symbol
3140 which this one really is. */
3141 /* See PR 20925 for a reproducer. */
3145 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3146 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3148 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3149 section
= bfd_ind_section_ptr
;
3150 flags
|= BSF_INDIRECT
;
3152 case N_COMM
| N_EXT
:
3153 section
= bfd_com_section_ptr
;
3155 case N_SETA
: case N_SETA
| N_EXT
:
3156 section
= bfd_abs_section_ptr
;
3157 flags
|= BSF_CONSTRUCTOR
;
3159 case N_SETT
: case N_SETT
| N_EXT
:
3160 section
= obj_textsec (abfd
);
3161 flags
|= BSF_CONSTRUCTOR
;
3162 value
-= bfd_get_section_vma (abfd
, section
);
3164 case N_SETD
: case N_SETD
| N_EXT
:
3165 section
= obj_datasec (abfd
);
3166 flags
|= BSF_CONSTRUCTOR
;
3167 value
-= bfd_get_section_vma (abfd
, section
);
3169 case N_SETB
: case N_SETB
| N_EXT
:
3170 section
= obj_bsssec (abfd
);
3171 flags
|= BSF_CONSTRUCTOR
;
3172 value
-= bfd_get_section_vma (abfd
, section
);
3175 /* A warning symbol. The next symbol is the one to warn
3176 about. If there is no next symbol, just look away. */
3181 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3182 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3184 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3185 section
= bfd_und_section_ptr
;
3186 flags
|= BSF_WARNING
;
3189 section
= bfd_und_section_ptr
;
3193 section
= bfd_abs_section_ptr
;
3197 section
= obj_textsec (abfd
);
3198 value
-= bfd_get_section_vma (abfd
, section
);
3202 section
= obj_datasec (abfd
);
3203 value
-= bfd_get_section_vma (abfd
, section
);
3207 section
= obj_bsssec (abfd
);
3208 value
-= bfd_get_section_vma (abfd
, section
);
3213 if (! ((*add_one_symbol
)
3214 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, FALSE
,
3215 (struct bfd_link_hash_entry
**) sym_hash
)))
3218 /* Restrict the maximum alignment of a common symbol based on
3219 the architecture, since a.out has no way to represent
3220 alignment requirements of a section in a .o file. FIXME:
3221 This isn't quite right: it should use the architecture of the
3222 output file, not the input files. */
3223 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3224 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3225 bfd_get_arch_info (abfd
)->section_align_power
))
3226 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3227 bfd_get_arch_info (abfd
)->section_align_power
;
3229 /* If this is a set symbol, and we are not building sets, then
3230 it is possible for the hash entry to not have been set. In
3231 such a case, treat the symbol as not globally defined. */
3232 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3234 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3238 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3245 /* Free up the internal symbols read from an a.out file. */
3248 aout_link_free_symbols (bfd
*abfd
)
3250 if (obj_aout_external_syms (abfd
) != NULL
)
3253 bfd_free_window (&obj_aout_sym_window (abfd
));
3255 free ((void *) obj_aout_external_syms (abfd
));
3257 obj_aout_external_syms (abfd
) = NULL
;
3259 if (obj_aout_external_strings (abfd
) != NULL
)
3262 bfd_free_window (&obj_aout_string_window (abfd
));
3264 free ((void *) obj_aout_external_strings (abfd
));
3266 obj_aout_external_strings (abfd
) = NULL
;
3271 /* Add symbols from an a.out object file. */
3274 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3276 if (! aout_get_external_symbols (abfd
))
3278 if (! aout_link_add_symbols (abfd
, info
))
3280 if (! info
->keep_memory
)
3282 if (! aout_link_free_symbols (abfd
))
3288 /* Look through the internal symbols to see if this object file should
3289 be included in the link. We should include this object file if it
3290 defines any symbols which are currently undefined. If this object
3291 file defines a common symbol, then we may adjust the size of the
3292 known symbol but we do not include the object file in the link
3293 (unless there is some other reason to include it). */
3296 aout_link_check_ar_symbols (bfd
*abfd
,
3297 struct bfd_link_info
*info
,
3298 bfd_boolean
*pneeded
,
3301 struct external_nlist
*p
;
3302 struct external_nlist
*pend
;
3307 /* Look through all the symbols. */
3308 p
= obj_aout_external_syms (abfd
);
3309 pend
= p
+ obj_aout_external_sym_count (abfd
);
3310 strings
= obj_aout_external_strings (abfd
);
3311 for (; p
< pend
; p
++)
3313 int type
= H_GET_8 (abfd
, p
->e_type
);
3315 struct bfd_link_hash_entry
*h
;
3317 /* Ignore symbols that are not externally visible. This is an
3318 optimization only, as we check the type more thoroughly
3320 if (((type
& N_EXT
) == 0
3321 || (type
& N_STAB
) != 0
3328 if (type
== N_WARNING
3334 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3335 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
3337 /* We are only interested in symbols that are currently
3338 undefined or common. */
3340 || (h
->type
!= bfd_link_hash_undefined
3341 && h
->type
!= bfd_link_hash_common
))
3343 if (type
== (N_INDR
| N_EXT
))
3348 if (type
== (N_TEXT
| N_EXT
)
3349 || type
== (N_DATA
| N_EXT
)
3350 || type
== (N_BSS
| N_EXT
)
3351 || type
== (N_ABS
| N_EXT
)
3352 || type
== (N_INDR
| N_EXT
))
3354 /* This object file defines this symbol. We must link it
3355 in. This is true regardless of whether the current
3356 definition of the symbol is undefined or common.
3358 If the current definition is common, we have a case in
3359 which we have already seen an object file including:
3361 and this object file from the archive includes:
3363 In such a case, whether to include this object is target
3364 dependant for backward compatibility.
3366 FIXME: The SunOS 4.1.3 linker will pull in the archive
3367 element if the symbol is defined in the .data section,
3368 but not if it is defined in the .text section. That
3369 seems a bit crazy to me, and it has not been implemented
3370 yet. However, it might be correct. */
3371 if (h
->type
== bfd_link_hash_common
)
3375 switch (info
->common_skip_ar_symbols
)
3377 case bfd_link_common_skip_none
:
3379 case bfd_link_common_skip_text
:
3380 skip
= (type
== (N_TEXT
| N_EXT
));
3382 case bfd_link_common_skip_data
:
3383 skip
= (type
== (N_DATA
| N_EXT
));
3385 case bfd_link_common_skip_all
:
3394 if (!(*info
->callbacks
3395 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3401 if (type
== (N_UNDF
| N_EXT
))
3405 value
= GET_WORD (abfd
, p
->e_value
);
3408 /* This symbol is common in the object from the archive
3410 if (h
->type
== bfd_link_hash_undefined
)
3415 symbfd
= h
->u
.undef
.abfd
;
3418 /* This symbol was created as undefined from
3419 outside BFD. We assume that we should link
3420 in the object file. This is done for the -u
3421 option in the linker. */
3422 if (!(*info
->callbacks
3423 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3428 /* Turn the current link symbol into a common
3429 symbol. It is already on the undefs list. */
3430 h
->type
= bfd_link_hash_common
;
3431 h
->u
.c
.p
= (struct bfd_link_hash_common_entry
*)
3432 bfd_hash_allocate (&info
->hash
->table
,
3433 sizeof (struct bfd_link_hash_common_entry
));
3434 if (h
->u
.c
.p
== NULL
)
3437 h
->u
.c
.size
= value
;
3439 /* FIXME: This isn't quite right. The maximum
3440 alignment of a common symbol should be set by the
3441 architecture of the output file, not of the input
3443 power
= bfd_log2 (value
);
3444 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3445 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3446 h
->u
.c
.p
->alignment_power
= power
;
3448 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3453 /* Adjust the size of the common symbol if
3455 if (value
> h
->u
.c
.size
)
3456 h
->u
.c
.size
= value
;
3466 /* This symbol is weak but defined. We must pull it in if
3467 the current link symbol is undefined, but we don't want
3468 it if the current link symbol is common. */
3469 if (h
->type
== bfd_link_hash_undefined
)
3471 if (!(*info
->callbacks
3472 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3480 /* We do not need this object file. */
3483 /* Check a single archive element to see if we need to include it in
3484 the link. *PNEEDED is set according to whether this element is
3485 needed in the link or not. This is called from
3486 _bfd_generic_link_add_archive_symbols. */
3489 aout_link_check_archive_element (bfd
*abfd
,
3490 struct bfd_link_info
*info
,
3491 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3492 const char *name ATTRIBUTE_UNUSED
,
3493 bfd_boolean
*pneeded
)
3498 if (!aout_get_external_symbols (abfd
))
3502 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
3508 /* Potentially, the add_archive_element hook may have set a
3509 substitute BFD for us. */
3512 if (!info
->keep_memory
3513 && !aout_link_free_symbols (oldbfd
))
3515 if (!aout_get_external_symbols (abfd
))
3518 if (!aout_link_add_symbols (abfd
, info
))
3522 if (!info
->keep_memory
|| !needed
)
3524 if (!aout_link_free_symbols (abfd
))
3531 /* Given an a.out BFD, add symbols to the global hash table as
3535 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
3537 switch (bfd_get_format (abfd
))
3540 return aout_link_add_object_symbols (abfd
, info
);
3542 return _bfd_generic_link_add_archive_symbols
3543 (abfd
, info
, aout_link_check_archive_element
);
3545 bfd_set_error (bfd_error_wrong_format
);
3550 /* A hash table used for header files with N_BINCL entries. */
3552 struct aout_link_includes_table
3554 struct bfd_hash_table root
;
3557 /* A linked list of totals that we have found for a particular header
3560 struct aout_link_includes_totals
3562 struct aout_link_includes_totals
*next
;
3566 /* An entry in the header file hash table. */
3568 struct aout_link_includes_entry
3570 struct bfd_hash_entry root
;
3571 /* List of totals we have found for this file. */
3572 struct aout_link_includes_totals
*totals
;
3575 /* Look up an entry in an the header file hash table. */
3577 #define aout_link_includes_lookup(table, string, create, copy) \
3578 ((struct aout_link_includes_entry *) \
3579 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3581 /* During the final link step we need to pass around a bunch of
3582 information, so we do it in an instance of this structure. */
3584 struct aout_final_link_info
3586 /* General link information. */
3587 struct bfd_link_info
*info
;
3590 /* Reloc file positions. */
3591 file_ptr treloff
, dreloff
;
3592 /* File position of symbols. */
3595 struct bfd_strtab_hash
*strtab
;
3596 /* Header file hash table. */
3597 struct aout_link_includes_table includes
;
3598 /* A buffer large enough to hold the contents of any section. */
3600 /* A buffer large enough to hold the relocs of any section. */
3602 /* A buffer large enough to hold the symbol map of any input BFD. */
3604 /* A buffer large enough to hold output symbols of any input BFD. */
3605 struct external_nlist
*output_syms
;
3608 /* The function to create a new entry in the header file hash table. */
3610 static struct bfd_hash_entry
*
3611 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3612 struct bfd_hash_table
*table
,
3615 struct aout_link_includes_entry
*ret
=
3616 (struct aout_link_includes_entry
*) entry
;
3618 /* Allocate the structure if it has not already been allocated by a
3621 ret
= (struct aout_link_includes_entry
*)
3622 bfd_hash_allocate (table
, sizeof (* ret
));
3626 /* Call the allocation method of the superclass. */
3627 ret
= ((struct aout_link_includes_entry
*)
3628 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3631 /* Set local fields. */
3635 return (struct bfd_hash_entry
*) ret
;
3638 /* Write out a symbol that was not associated with an a.out input
3642 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3644 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3645 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3649 struct external_nlist outsym
;
3653 if (h
->root
.type
== bfd_link_hash_warning
)
3655 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3656 if (h
->root
.type
== bfd_link_hash_new
)
3660 output_bfd
= flaginfo
->output_bfd
;
3662 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3664 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3665 (output_bfd
, flaginfo
->info
, h
)))
3667 /* FIXME: No way to handle errors. */
3677 /* An indx of -2 means the symbol must be written. */
3679 && (flaginfo
->info
->strip
== strip_all
3680 || (flaginfo
->info
->strip
== strip_some
3681 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3682 FALSE
, FALSE
) == NULL
)))
3685 switch (h
->root
.type
)
3688 case bfd_link_hash_warning
:
3690 /* Avoid variable not initialized warnings. */
3692 case bfd_link_hash_new
:
3693 /* This can happen for set symbols when sets are not being
3696 case bfd_link_hash_undefined
:
3697 type
= N_UNDF
| N_EXT
;
3700 case bfd_link_hash_defined
:
3701 case bfd_link_hash_defweak
:
3705 sec
= h
->root
.u
.def
.section
->output_section
;
3706 BFD_ASSERT (bfd_is_abs_section (sec
)
3707 || sec
->owner
== output_bfd
);
3708 if (sec
== obj_textsec (output_bfd
))
3709 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3710 else if (sec
== obj_datasec (output_bfd
))
3711 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3712 else if (sec
== obj_bsssec (output_bfd
))
3713 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3715 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3717 val
= (h
->root
.u
.def
.value
3719 + h
->root
.u
.def
.section
->output_offset
);
3722 case bfd_link_hash_common
:
3723 type
= N_UNDF
| N_EXT
;
3724 val
= h
->root
.u
.c
.size
;
3726 case bfd_link_hash_undefweak
:
3730 case bfd_link_hash_indirect
:
3731 /* We ignore these symbols, since the indirected symbol is
3732 already in the hash table. */
3736 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3737 H_PUT_8 (output_bfd
, 0, outsym
.e_other
);
3738 H_PUT_16 (output_bfd
, 0, outsym
.e_desc
);
3739 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3741 if (indx
== - (bfd_size_type
) 1)
3742 /* FIXME: No way to handle errors. */
3745 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3746 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3748 amt
= EXTERNAL_NLIST_SIZE
;
3749 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3750 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3751 /* FIXME: No way to handle errors. */
3754 flaginfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
3755 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3756 ++obj_aout_external_sym_count (output_bfd
);
3761 /* Handle a link order which is supposed to generate a reloc. */
3764 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3766 struct bfd_link_order
*p
)
3768 struct bfd_link_order_reloc
*pr
;
3771 reloc_howto_type
*howto
;
3772 file_ptr
*reloff_ptr
= NULL
;
3773 struct reloc_std_external srel
;
3774 struct reloc_ext_external erel
;
3780 if (p
->type
== bfd_section_reloc_link_order
)
3783 if (bfd_is_abs_section (pr
->u
.section
))
3784 r_index
= N_ABS
| N_EXT
;
3787 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3788 r_index
= pr
->u
.section
->target_index
;
3793 struct aout_link_hash_entry
*h
;
3795 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3797 h
= ((struct aout_link_hash_entry
*)
3798 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3799 pr
->u
.name
, FALSE
, FALSE
, TRUE
));
3805 /* We decided to strip this symbol, but it turns out that we
3806 can't. Note that we lose the other and desc information
3807 here. I don't think that will ever matter for a global
3811 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3817 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3818 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3823 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3826 bfd_set_error (bfd_error_bad_value
);
3830 if (o
== obj_textsec (flaginfo
->output_bfd
))
3831 reloff_ptr
= &flaginfo
->treloff
;
3832 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3833 reloff_ptr
= &flaginfo
->dreloff
;
3837 if (obj_reloc_entry_size (flaginfo
->output_bfd
) == RELOC_STD_SIZE
)
3840 MY_put_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3850 r_pcrel
= (int) howto
->pc_relative
;
3851 r_baserel
= (howto
->type
& 8) != 0;
3852 r_jmptable
= (howto
->type
& 16) != 0;
3853 r_relative
= (howto
->type
& 32) != 0;
3854 r_length
= howto
->size
;
3856 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3857 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3859 srel
.r_index
[0] = r_index
>> 16;
3860 srel
.r_index
[1] = r_index
>> 8;
3861 srel
.r_index
[2] = r_index
;
3863 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3864 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3865 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3866 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3867 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3868 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3872 srel
.r_index
[2] = r_index
>> 16;
3873 srel
.r_index
[1] = r_index
>> 8;
3874 srel
.r_index
[0] = r_index
;
3876 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3877 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3878 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3879 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3880 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3881 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3885 rel_ptr
= (void *) &srel
;
3887 /* We have to write the addend into the object file, since
3888 standard a.out relocs are in place. It would be more
3889 reliable if we had the current contents of the file here,
3890 rather than assuming zeroes, but we can't read the file since
3891 it was opened using bfd_openw. */
3892 if (pr
->addend
!= 0)
3895 bfd_reloc_status_type r
;
3899 size
= bfd_get_reloc_size (howto
);
3900 buf
= (bfd_byte
*) bfd_zmalloc (size
);
3901 if (buf
== NULL
&& size
!= 0)
3903 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3904 (bfd_vma
) pr
->addend
, buf
);
3910 case bfd_reloc_outofrange
:
3912 case bfd_reloc_overflow
:
3913 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3914 (flaginfo
->info
, NULL
,
3915 (p
->type
== bfd_section_reloc_link_order
3916 ? bfd_section_name (flaginfo
->output_bfd
,
3919 howto
->name
, pr
->addend
, NULL
, NULL
, (bfd_vma
) 0);
3922 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
, (void *) buf
,
3923 (file_ptr
) p
->offset
, size
);
3931 #ifdef MY_put_ext_reloc
3932 MY_put_ext_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
,
3933 howto
, &erel
, pr
->addend
);
3935 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, erel
.r_address
);
3937 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3939 erel
.r_index
[0] = r_index
>> 16;
3940 erel
.r_index
[1] = r_index
>> 8;
3941 erel
.r_index
[2] = r_index
;
3943 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
3944 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
3948 erel
.r_index
[2] = r_index
>> 16;
3949 erel
.r_index
[1] = r_index
>> 8;
3950 erel
.r_index
[0] = r_index
;
3952 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
3953 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
3956 PUT_WORD (flaginfo
->output_bfd
, (bfd_vma
) pr
->addend
, erel
.r_addend
);
3957 #endif /* MY_put_ext_reloc */
3959 rel_ptr
= (void *) &erel
;
3962 amt
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3963 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3964 || bfd_bwrite (rel_ptr
, amt
, flaginfo
->output_bfd
) != amt
)
3967 *reloff_ptr
+= obj_reloc_entry_size (flaginfo
->output_bfd
);
3969 /* Assert that the relocs have not run into the symbols, and that n
3970 the text relocs have not run into the data relocs. */
3971 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3972 && (reloff_ptr
!= &flaginfo
->treloff
3974 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3979 /* Get the section corresponding to a reloc index. */
3981 static INLINE asection
*
3982 aout_reloc_index_to_section (bfd
*abfd
, int indx
)
3984 switch (indx
& N_TYPE
)
3986 case N_TEXT
: return obj_textsec (abfd
);
3987 case N_DATA
: return obj_datasec (abfd
);
3988 case N_BSS
: return obj_bsssec (abfd
);
3990 case N_UNDF
: return bfd_abs_section_ptr
;
3996 /* Relocate an a.out section using standard a.out relocs. */
3999 aout_link_input_section_std (struct aout_final_link_info
*flaginfo
,
4001 asection
*input_section
,
4002 struct reloc_std_external
*relocs
,
4003 bfd_size_type rel_size
,
4006 bfd_boolean (*check_dynamic_reloc
)
4007 (struct bfd_link_info
*, bfd
*, asection
*,
4008 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4011 bfd_boolean relocatable
;
4012 struct external_nlist
*syms
;
4014 struct aout_link_hash_entry
**sym_hashes
;
4016 bfd_size_type reloc_count
;
4017 struct reloc_std_external
*rel
;
4018 struct reloc_std_external
*rel_end
;
4020 output_bfd
= flaginfo
->output_bfd
;
4021 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4023 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
4024 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4025 == output_bfd
->xvec
->header_byteorder
);
4027 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4028 syms
= obj_aout_external_syms (input_bfd
);
4029 strings
= obj_aout_external_strings (input_bfd
);
4030 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4031 symbol_map
= flaginfo
->symbol_map
;
4033 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4035 rel_end
= rel
+ reloc_count
;
4036 for (; rel
< rel_end
; rel
++)
4043 reloc_howto_type
*howto
;
4044 struct aout_link_hash_entry
*h
= NULL
;
4046 bfd_reloc_status_type r
;
4048 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4050 #ifdef MY_reloc_howto
4051 howto
= MY_reloc_howto (input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
4057 unsigned int howto_idx
;
4059 if (bfd_header_big_endian (input_bfd
))
4061 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4062 | ((unsigned int) rel
->r_index
[1] << 8)
4064 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4065 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4066 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4067 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4068 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4069 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4070 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4074 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4075 | ((unsigned int) rel
->r_index
[1] << 8)
4077 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4078 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4079 r_baserel
= (0 != (rel
->r_type
[0]
4080 & RELOC_STD_BITS_BASEREL_LITTLE
));
4081 r_jmptable
= (0 != (rel
->r_type
[0]
4082 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4083 r_relative
= (0 != (rel
->r_type
[0]
4084 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4085 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4086 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4089 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4090 + 16 * r_jmptable
+ 32 * r_relative
);
4091 if (howto_idx
< TABLE_SIZE (howto_table_std
))
4092 howto
= howto_table_std
+ howto_idx
;
4100 _bfd_error_handler (_("%pB: unsupported relocation type"),
4102 bfd_set_error (bfd_error_bad_value
);
4108 /* We are generating a relocatable output file, and must
4109 modify the reloc accordingly. */
4112 /* If we know the symbol this relocation is against,
4113 convert it into a relocation against a section. This
4114 is what the native linker does. */
4115 h
= sym_hashes
[r_index
];
4117 && (h
->root
.type
== bfd_link_hash_defined
4118 || h
->root
.type
== bfd_link_hash_defweak
))
4120 asection
*output_section
;
4122 /* Change the r_extern value. */
4123 if (bfd_header_big_endian (output_bfd
))
4124 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4126 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4128 /* Compute a new r_index. */
4129 output_section
= h
->root
.u
.def
.section
->output_section
;
4130 if (output_section
== obj_textsec (output_bfd
))
4132 else if (output_section
== obj_datasec (output_bfd
))
4134 else if (output_section
== obj_bsssec (output_bfd
))
4139 /* Add the symbol value and the section VMA to the
4140 addend stored in the contents. */
4141 relocation
= (h
->root
.u
.def
.value
4142 + output_section
->vma
4143 + h
->root
.u
.def
.section
->output_offset
);
4147 /* We must change r_index according to the symbol
4149 r_index
= symbol_map
[r_index
];
4155 /* We decided to strip this symbol, but it
4156 turns out that we can't. Note that we
4157 lose the other and desc information here.
4158 I don't think that will ever matter for a
4164 if (!aout_link_write_other_symbol (&h
->root
.root
,
4174 name
= strings
+ GET_WORD (input_bfd
,
4175 syms
[r_index
].e_strx
);
4176 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4177 (flaginfo
->info
, name
,
4178 input_bfd
, input_section
, r_addr
);
4186 /* Write out the new r_index value. */
4187 if (bfd_header_big_endian (output_bfd
))
4189 rel
->r_index
[0] = r_index
>> 16;
4190 rel
->r_index
[1] = r_index
>> 8;
4191 rel
->r_index
[2] = r_index
;
4195 rel
->r_index
[2] = r_index
>> 16;
4196 rel
->r_index
[1] = r_index
>> 8;
4197 rel
->r_index
[0] = r_index
;
4204 /* This is a relocation against a section. We must
4205 adjust by the amount that the section moved. */
4206 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4207 relocation
= (section
->output_section
->vma
4208 + section
->output_offset
4212 /* Change the address of the relocation. */
4213 PUT_WORD (output_bfd
,
4214 r_addr
+ input_section
->output_offset
,
4217 /* Adjust a PC relative relocation by removing the reference
4218 to the original address in the section and including the
4219 reference to the new address. */
4221 relocation
-= (input_section
->output_section
->vma
4222 + input_section
->output_offset
4223 - input_section
->vma
);
4225 #ifdef MY_relocatable_reloc
4226 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4229 if (relocation
== 0)
4232 r
= MY_relocate_contents (howto
,
4233 input_bfd
, relocation
,
4240 /* We are generating an executable, and must do a full
4246 h
= sym_hashes
[r_index
];
4249 && (h
->root
.type
== bfd_link_hash_defined
4250 || h
->root
.type
== bfd_link_hash_defweak
))
4252 relocation
= (h
->root
.u
.def
.value
4253 + h
->root
.u
.def
.section
->output_section
->vma
4254 + h
->root
.u
.def
.section
->output_offset
);
4257 && h
->root
.type
== bfd_link_hash_undefweak
)
4269 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4270 relocation
= (section
->output_section
->vma
4271 + section
->output_offset
4274 relocation
+= input_section
->vma
;
4277 if (check_dynamic_reloc
!= NULL
)
4281 if (! ((*check_dynamic_reloc
)
4282 (flaginfo
->info
, input_bfd
, input_section
, h
,
4283 (void *) rel
, contents
, &skip
, &relocation
)))
4289 /* Now warn if a global symbol is undefined. We could not
4290 do this earlier, because check_dynamic_reloc might want
4291 to skip this reloc. */
4292 if (hundef
&& ! bfd_link_pic (flaginfo
->info
) && ! r_baserel
)
4297 name
= h
->root
.root
.string
;
4299 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4300 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4301 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4304 r
= MY_final_link_relocate (howto
,
4305 input_bfd
, input_section
,
4306 contents
, r_addr
, relocation
,
4310 if (r
!= bfd_reloc_ok
)
4315 case bfd_reloc_outofrange
:
4317 case bfd_reloc_overflow
:
4324 name
= strings
+ GET_WORD (input_bfd
,
4325 syms
[r_index
].e_strx
);
4330 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4331 name
= bfd_section_name (input_bfd
, s
);
4333 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4334 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4335 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
4345 /* Relocate an a.out section using extended a.out relocs. */
4348 aout_link_input_section_ext (struct aout_final_link_info
*flaginfo
,
4350 asection
*input_section
,
4351 struct reloc_ext_external
*relocs
,
4352 bfd_size_type rel_size
,
4355 bfd_boolean (*check_dynamic_reloc
)
4356 (struct bfd_link_info
*, bfd
*, asection
*,
4357 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4360 bfd_boolean relocatable
;
4361 struct external_nlist
*syms
;
4363 struct aout_link_hash_entry
**sym_hashes
;
4365 bfd_size_type reloc_count
;
4366 struct reloc_ext_external
*rel
;
4367 struct reloc_ext_external
*rel_end
;
4369 output_bfd
= flaginfo
->output_bfd
;
4370 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4372 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4373 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4374 == output_bfd
->xvec
->header_byteorder
);
4376 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4377 syms
= obj_aout_external_syms (input_bfd
);
4378 strings
= obj_aout_external_strings (input_bfd
);
4379 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4380 symbol_map
= flaginfo
->symbol_map
;
4382 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4384 rel_end
= rel
+ reloc_count
;
4385 for (; rel
< rel_end
; rel
++)
4390 unsigned int r_type
;
4392 struct aout_link_hash_entry
*h
= NULL
;
4393 asection
*r_section
= NULL
;
4396 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4398 if (bfd_header_big_endian (input_bfd
))
4400 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4401 | ((unsigned int) rel
->r_index
[1] << 8)
4403 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4404 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4405 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4409 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4410 | ((unsigned int) rel
->r_index
[1] << 8)
4412 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4413 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4414 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4417 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4419 if (r_type
>= TABLE_SIZE (howto_table_ext
))
4421 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
4423 bfd_set_error (bfd_error_bad_value
);
4429 /* We are generating a relocatable output file, and must
4430 modify the reloc accordingly. */
4432 || r_type
== (unsigned int) RELOC_BASE10
4433 || r_type
== (unsigned int) RELOC_BASE13
4434 || r_type
== (unsigned int) RELOC_BASE22
)
4436 /* If we know the symbol this relocation is against,
4437 convert it into a relocation against a section. This
4438 is what the native linker does. */
4439 if (r_type
== (unsigned int) RELOC_BASE10
4440 || r_type
== (unsigned int) RELOC_BASE13
4441 || r_type
== (unsigned int) RELOC_BASE22
)
4444 h
= sym_hashes
[r_index
];
4446 && (h
->root
.type
== bfd_link_hash_defined
4447 || h
->root
.type
== bfd_link_hash_defweak
))
4449 asection
*output_section
;
4451 /* Change the r_extern value. */
4452 if (bfd_header_big_endian (output_bfd
))
4453 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4455 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4457 /* Compute a new r_index. */
4458 output_section
= h
->root
.u
.def
.section
->output_section
;
4459 if (output_section
== obj_textsec (output_bfd
))
4461 else if (output_section
== obj_datasec (output_bfd
))
4463 else if (output_section
== obj_bsssec (output_bfd
))
4468 /* Add the symbol value and the section VMA to the
4470 relocation
= (h
->root
.u
.def
.value
4471 + output_section
->vma
4472 + h
->root
.u
.def
.section
->output_offset
);
4474 /* Now RELOCATION is the VMA of the final
4475 destination. If this is a PC relative reloc,
4476 then ADDEND is the negative of the source VMA.
4477 We want to set ADDEND to the difference between
4478 the destination VMA and the source VMA, which
4479 means we must adjust RELOCATION by the change in
4480 the source VMA. This is done below. */
4484 /* We must change r_index according to the symbol
4486 r_index
= symbol_map
[r_index
];
4492 /* We decided to strip this symbol, but it
4493 turns out that we can't. Note that we
4494 lose the other and desc information here.
4495 I don't think that will ever matter for a
4501 if (!aout_link_write_other_symbol (&h
->root
.root
,
4511 name
= strings
+ GET_WORD (input_bfd
,
4512 syms
[r_index
].e_strx
);
4513 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4514 (flaginfo
->info
, name
,
4515 input_bfd
, input_section
, r_addr
);
4522 /* If this is a PC relative reloc, then the addend
4523 is the negative of the source VMA. We must
4524 adjust it by the change in the source VMA. This
4528 /* Write out the new r_index value. */
4529 if (bfd_header_big_endian (output_bfd
))
4531 rel
->r_index
[0] = r_index
>> 16;
4532 rel
->r_index
[1] = r_index
>> 8;
4533 rel
->r_index
[2] = r_index
;
4537 rel
->r_index
[2] = r_index
>> 16;
4538 rel
->r_index
[1] = r_index
>> 8;
4539 rel
->r_index
[0] = r_index
;
4544 /* This is a relocation against a section. We must
4545 adjust by the amount that the section moved. */
4546 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4547 relocation
= (r_section
->output_section
->vma
4548 + r_section
->output_offset
4551 /* If this is a PC relative reloc, then the addend is
4552 the difference in VMA between the destination and the
4553 source. We have just adjusted for the change in VMA
4554 of the destination, so we must also adjust by the
4555 change in VMA of the source. This is done below. */
4558 /* As described above, we must always adjust a PC relative
4559 reloc by the change in VMA of the source. However, if
4560 pcrel_offset is set, then the addend does not include the
4561 location within the section, in which case we don't need
4562 to adjust anything. */
4563 if (howto_table_ext
[r_type
].pc_relative
4564 && ! howto_table_ext
[r_type
].pcrel_offset
)
4565 relocation
-= (input_section
->output_section
->vma
4566 + input_section
->output_offset
4567 - input_section
->vma
);
4569 /* Change the addend if necessary. */
4570 if (relocation
!= 0)
4571 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4573 /* Change the address of the relocation. */
4574 PUT_WORD (output_bfd
,
4575 r_addr
+ input_section
->output_offset
,
4581 bfd_reloc_status_type r
;
4583 /* We are generating an executable, and must do a full
4589 h
= sym_hashes
[r_index
];
4592 && (h
->root
.type
== bfd_link_hash_defined
4593 || h
->root
.type
== bfd_link_hash_defweak
))
4595 relocation
= (h
->root
.u
.def
.value
4596 + h
->root
.u
.def
.section
->output_section
->vma
4597 + h
->root
.u
.def
.section
->output_offset
);
4600 && h
->root
.type
== bfd_link_hash_undefweak
)
4608 else if (r_type
== (unsigned int) RELOC_BASE10
4609 || r_type
== (unsigned int) RELOC_BASE13
4610 || r_type
== (unsigned int) RELOC_BASE22
)
4612 struct external_nlist
*sym
;
4615 /* For base relative relocs, r_index is always an index
4616 into the symbol table, even if r_extern is 0. */
4617 sym
= syms
+ r_index
;
4618 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4619 if ((type
& N_TYPE
) == N_TEXT
4621 r_section
= obj_textsec (input_bfd
);
4622 else if ((type
& N_TYPE
) == N_DATA
4624 r_section
= obj_datasec (input_bfd
);
4625 else if ((type
& N_TYPE
) == N_BSS
4627 r_section
= obj_bsssec (input_bfd
);
4628 else if ((type
& N_TYPE
) == N_ABS
4630 r_section
= bfd_abs_section_ptr
;
4633 relocation
= (r_section
->output_section
->vma
4634 + r_section
->output_offset
4635 + (GET_WORD (input_bfd
, sym
->e_value
)
4640 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4642 /* If this is a PC relative reloc, then R_ADDEND is the
4643 difference between the two vmas, or
4644 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4646 old_dest_sec == section->vma
4648 old_src_sec == input_section->vma
4650 old_src_off == r_addr
4652 _bfd_final_link_relocate expects RELOCATION +
4653 R_ADDEND to be the VMA of the destination minus
4654 r_addr (the minus r_addr is because this relocation
4655 is not pcrel_offset, which is a bit confusing and
4656 should, perhaps, be changed), or
4659 new_dest_sec == output_section->vma + output_offset
4660 We arrange for this to happen by setting RELOCATION to
4661 new_dest_sec + old_src_sec - old_dest_sec
4663 If this is not a PC relative reloc, then R_ADDEND is
4664 simply the VMA of the destination, so we set
4665 RELOCATION to the change in the destination VMA, or
4666 new_dest_sec - old_dest_sec
4668 relocation
= (r_section
->output_section
->vma
4669 + r_section
->output_offset
4671 if (howto_table_ext
[r_type
].pc_relative
)
4672 relocation
+= input_section
->vma
;
4675 if (check_dynamic_reloc
!= NULL
)
4679 if (! ((*check_dynamic_reloc
)
4680 (flaginfo
->info
, input_bfd
, input_section
, h
,
4681 (void *) rel
, contents
, &skip
, &relocation
)))
4687 /* Now warn if a global symbol is undefined. We could not
4688 do this earlier, because check_dynamic_reloc might want
4689 to skip this reloc. */
4691 && ! bfd_link_pic (flaginfo
->info
)
4692 && r_type
!= (unsigned int) RELOC_BASE10
4693 && r_type
!= (unsigned int) RELOC_BASE13
4694 && r_type
!= (unsigned int) RELOC_BASE22
)
4699 name
= h
->root
.root
.string
;
4701 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4702 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4703 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4706 if (r_type
!= (unsigned int) RELOC_SPARC_REV32
)
4707 r
= MY_final_link_relocate (howto_table_ext
+ r_type
,
4708 input_bfd
, input_section
,
4709 contents
, r_addr
, relocation
,
4715 x
= bfd_get_32 (input_bfd
, contents
+ r_addr
);
4716 x
= x
+ relocation
+ r_addend
;
4717 bfd_putl32 (/*input_bfd,*/ x
, contents
+ r_addr
);
4721 if (r
!= bfd_reloc_ok
)
4726 case bfd_reloc_outofrange
:
4728 case bfd_reloc_overflow
:
4735 || r_type
== (unsigned int) RELOC_BASE10
4736 || r_type
== (unsigned int) RELOC_BASE13
4737 || r_type
== (unsigned int) RELOC_BASE22
)
4738 name
= strings
+ GET_WORD (input_bfd
,
4739 syms
[r_index
].e_strx
);
4744 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4745 name
= bfd_section_name (input_bfd
, s
);
4747 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4748 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
,
4749 howto_table_ext
[r_type
].name
,
4750 r_addend
, input_bfd
, input_section
, r_addr
);
4761 /* Link an a.out section into the output file. */
4764 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
4766 asection
*input_section
,
4767 file_ptr
*reloff_ptr
,
4768 bfd_size_type rel_size
)
4770 bfd_size_type input_size
;
4773 /* Get the section contents. */
4774 input_size
= input_section
->size
;
4775 if (! bfd_get_section_contents (input_bfd
, input_section
,
4776 (void *) flaginfo
->contents
,
4777 (file_ptr
) 0, input_size
))
4780 /* Read in the relocs if we haven't already done it. */
4781 if (aout_section_data (input_section
) != NULL
4782 && aout_section_data (input_section
)->relocs
!= NULL
)
4783 relocs
= aout_section_data (input_section
)->relocs
;
4786 relocs
= flaginfo
->relocs
;
4789 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4790 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
4795 /* Relocate the section contents. */
4796 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4798 if (! aout_link_input_section_std (flaginfo
, input_bfd
, input_section
,
4799 (struct reloc_std_external
*) relocs
,
4800 rel_size
, flaginfo
->contents
))
4805 if (! aout_link_input_section_ext (flaginfo
, input_bfd
, input_section
,
4806 (struct reloc_ext_external
*) relocs
,
4807 rel_size
, flaginfo
->contents
))
4811 /* Write out the section contents. */
4812 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
4813 input_section
->output_section
,
4814 (void *) flaginfo
->contents
,
4815 (file_ptr
) input_section
->output_offset
,
4819 /* If we are producing relocatable output, the relocs were
4820 modified, and we now write them out. */
4821 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
4823 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4825 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
4827 *reloff_ptr
+= rel_size
;
4829 /* Assert that the relocs have not run into the symbols, and
4830 that if these are the text relocs they have not run into the
4832 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
4833 && (reloff_ptr
!= &flaginfo
->treloff
4835 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
4841 /* Adjust and write out the symbols for an a.out file. Set the new
4842 symbol indices into a symbol_map. */
4845 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4848 bfd_size_type sym_count
;
4850 enum bfd_link_strip strip
;
4851 enum bfd_link_discard discard
;
4852 struct external_nlist
*outsym
;
4853 bfd_size_type strtab_index
;
4854 struct external_nlist
*sym
;
4855 struct external_nlist
*sym_end
;
4856 struct aout_link_hash_entry
**sym_hash
;
4859 bfd_boolean skip_next
;
4861 output_bfd
= flaginfo
->output_bfd
;
4862 sym_count
= obj_aout_external_sym_count (input_bfd
);
4863 strings
= obj_aout_external_strings (input_bfd
);
4864 strip
= flaginfo
->info
->strip
;
4865 discard
= flaginfo
->info
->discard
;
4866 outsym
= flaginfo
->output_syms
;
4868 /* First write out a symbol for this object file, unless we are
4869 discarding such symbols. */
4870 if (strip
!= strip_all
4871 && (strip
!= strip_some
4872 || bfd_hash_lookup (flaginfo
->info
->keep_hash
, input_bfd
->filename
,
4873 FALSE
, FALSE
) != NULL
)
4874 && discard
!= discard_all
)
4876 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4877 H_PUT_8 (output_bfd
, 0, outsym
->e_other
);
4878 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4879 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4880 input_bfd
->filename
, FALSE
);
4881 if (strtab_index
== (bfd_size_type
) -1)
4883 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4884 PUT_WORD (output_bfd
,
4885 (bfd_get_section_vma (output_bfd
,
4886 obj_textsec (input_bfd
)->output_section
)
4887 + obj_textsec (input_bfd
)->output_offset
),
4889 ++obj_aout_external_sym_count (output_bfd
);
4895 sym
= obj_aout_external_syms (input_bfd
);
4896 sym_end
= sym
+ sym_count
;
4897 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4898 symbol_map
= flaginfo
->symbol_map
;
4899 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4900 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4904 struct aout_link_hash_entry
*h
;
4910 /* We set *symbol_map to 0 above for all symbols. If it has
4911 already been set to -1 for this symbol, it means that we are
4912 discarding it because it appears in a duplicate header file.
4913 See the N_BINCL code below. */
4914 if (*symbol_map
== -1)
4917 /* Initialize *symbol_map to -1, which means that the symbol was
4918 not copied into the output file. We will change it later if
4919 we do copy the symbol over. */
4922 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4923 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4929 /* Pass this symbol through. It is the target of an
4930 indirect or warning symbol. */
4931 val
= GET_WORD (input_bfd
, sym
->e_value
);
4936 /* Skip this symbol, which is the target of an indirect
4937 symbol that we have changed to no longer be an indirect
4944 struct aout_link_hash_entry
*hresolve
;
4946 /* We have saved the hash table entry for this symbol, if
4947 there is one. Note that we could just look it up again
4948 in the hash table, provided we first check that it is an
4952 /* Use the name from the hash table, in case the symbol was
4955 && h
->root
.type
!= bfd_link_hash_warning
)
4956 name
= h
->root
.root
.string
;
4958 /* If this is an indirect or warning symbol, then change
4959 hresolve to the base symbol. We also change *sym_hash so
4960 that the relocation routines relocate against the real
4963 if (h
!= (struct aout_link_hash_entry
*) NULL
4964 && (h
->root
.type
== bfd_link_hash_indirect
4965 || h
->root
.type
== bfd_link_hash_warning
))
4967 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4968 while (hresolve
->root
.type
== bfd_link_hash_indirect
4969 || hresolve
->root
.type
== bfd_link_hash_warning
)
4970 hresolve
= ((struct aout_link_hash_entry
*)
4971 hresolve
->root
.u
.i
.link
);
4972 *sym_hash
= hresolve
;
4975 /* If the symbol has already been written out, skip it. */
4979 if ((type
& N_TYPE
) == N_INDR
4980 || type
== N_WARNING
)
4982 *symbol_map
= h
->indx
;
4986 /* See if we are stripping this symbol. */
4992 case strip_debugger
:
4993 if ((type
& N_STAB
) != 0)
4997 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
5012 /* Get the value of the symbol. */
5013 if ((type
& N_TYPE
) == N_TEXT
5015 symsec
= obj_textsec (input_bfd
);
5016 else if ((type
& N_TYPE
) == N_DATA
5018 symsec
= obj_datasec (input_bfd
);
5019 else if ((type
& N_TYPE
) == N_BSS
5021 symsec
= obj_bsssec (input_bfd
);
5022 else if ((type
& N_TYPE
) == N_ABS
5024 symsec
= bfd_abs_section_ptr
;
5025 else if (((type
& N_TYPE
) == N_INDR
5026 && (hresolve
== NULL
5027 || (hresolve
->root
.type
!= bfd_link_hash_defined
5028 && hresolve
->root
.type
!= bfd_link_hash_defweak
5029 && hresolve
->root
.type
!= bfd_link_hash_common
)))
5030 || type
== N_WARNING
)
5032 /* Pass the next symbol through unchanged. The
5033 condition above for indirect symbols is so that if
5034 the indirect symbol was defined, we output it with
5035 the correct definition so the debugger will
5038 val
= GET_WORD (input_bfd
, sym
->e_value
);
5041 else if ((type
& N_STAB
) != 0)
5043 val
= GET_WORD (input_bfd
, sym
->e_value
);
5048 /* If we get here with an indirect symbol, it means that
5049 we are outputting it with a real definition. In such
5050 a case we do not want to output the next symbol,
5051 which is the target of the indirection. */
5052 if ((type
& N_TYPE
) == N_INDR
)
5057 /* We need to get the value from the hash table. We use
5058 hresolve so that if we have defined an indirect
5059 symbol we output the final definition. */
5062 switch (type
& N_TYPE
)
5065 symsec
= obj_textsec (input_bfd
);
5068 symsec
= obj_datasec (input_bfd
);
5071 symsec
= obj_bsssec (input_bfd
);
5074 symsec
= bfd_abs_section_ptr
;
5081 else if (hresolve
->root
.type
== bfd_link_hash_defined
5082 || hresolve
->root
.type
== bfd_link_hash_defweak
)
5084 asection
*input_section
;
5085 asection
*output_section
;
5087 /* This case usually means a common symbol which was
5088 turned into a defined symbol. */
5089 input_section
= hresolve
->root
.u
.def
.section
;
5090 output_section
= input_section
->output_section
;
5091 BFD_ASSERT (bfd_is_abs_section (output_section
)
5092 || output_section
->owner
== output_bfd
);
5093 val
= (hresolve
->root
.u
.def
.value
5094 + bfd_get_section_vma (output_bfd
, output_section
)
5095 + input_section
->output_offset
);
5097 /* Get the correct type based on the section. If
5098 this is a constructed set, force it to be
5099 globally visible. */
5108 if (output_section
== obj_textsec (output_bfd
))
5109 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5112 else if (output_section
== obj_datasec (output_bfd
))
5113 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5116 else if (output_section
== obj_bsssec (output_bfd
))
5117 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5121 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5125 else if (hresolve
->root
.type
== bfd_link_hash_common
)
5126 val
= hresolve
->root
.u
.c
.size
;
5127 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
5136 val
= (symsec
->output_section
->vma
5137 + symsec
->output_offset
5138 + (GET_WORD (input_bfd
, sym
->e_value
)
5141 /* If this is a global symbol set the written flag, and if
5142 it is a local symbol see if we should discard it. */
5146 h
->indx
= obj_aout_external_sym_count (output_bfd
);
5148 else if ((type
& N_TYPE
) != N_SETT
5149 && (type
& N_TYPE
) != N_SETD
5150 && (type
& N_TYPE
) != N_SETB
5151 && (type
& N_TYPE
) != N_SETA
)
5156 case discard_sec_merge
:
5159 if ((type
& N_STAB
) == 0
5160 && bfd_is_local_label_name (input_bfd
, name
))
5174 /* An N_BINCL symbol indicates the start of the stabs
5175 entries for a header file. We need to scan ahead to the
5176 next N_EINCL symbol, ignoring nesting, adding up all the
5177 characters in the symbol names, not including the file
5178 numbers in types (the first number after an open
5180 if (type
== (int) N_BINCL
)
5182 struct external_nlist
*incl_sym
;
5184 struct aout_link_includes_entry
*incl_entry
;
5185 struct aout_link_includes_totals
*t
;
5189 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
5193 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5194 if (incl_type
== (int) N_EINCL
)
5200 else if (incl_type
== (int) N_BINCL
)
5206 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
5207 for (; *s
!= '\0'; s
++)
5212 /* Skip the file number. */
5214 while (ISDIGIT (*s
))
5222 /* If we have already included a header file with the
5223 same value, then replace this one with an N_EXCL
5225 copy
= (bfd_boolean
) (! flaginfo
->info
->keep_memory
);
5226 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
5228 if (incl_entry
== NULL
)
5230 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
5231 if (t
->total
== val
)
5235 /* This is the first time we have seen this header
5236 file with this set of stabs strings. */
5237 t
= (struct aout_link_includes_totals
*)
5238 bfd_hash_allocate (&flaginfo
->includes
.root
,
5243 t
->next
= incl_entry
->totals
;
5244 incl_entry
->totals
= t
;
5250 /* This is a duplicate header file. We must change
5251 it to be an N_EXCL entry, and mark all the
5252 included symbols to prevent outputting them. */
5253 type
= (int) N_EXCL
;
5256 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
5258 incl_sym
++, incl_map
++)
5262 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5263 if (incl_type
== (int) N_EINCL
)
5272 else if (incl_type
== (int) N_BINCL
)
5281 /* Copy this symbol into the list of symbols we are going to
5283 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
5284 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_other
), outsym
->e_other
);
5285 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
5287 if (! flaginfo
->info
->keep_memory
)
5289 /* name points into a string table which we are going to
5290 free. If there is a hash table entry, use that string.
5291 Otherwise, copy name into memory. */
5293 name
= h
->root
.root
.string
;
5297 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
5299 if (strtab_index
== (bfd_size_type
) -1)
5301 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
5302 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
5303 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
5304 ++obj_aout_external_sym_count (output_bfd
);
5308 /* Write out the output symbols we have just constructed. */
5309 if (outsym
> flaginfo
->output_syms
)
5311 bfd_size_type outsym_size
;
5313 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
5315 outsym_size
= outsym
- flaginfo
->output_syms
;
5316 outsym_size
*= EXTERNAL_NLIST_SIZE
;
5317 if (bfd_bwrite ((void *) flaginfo
->output_syms
, outsym_size
, output_bfd
)
5320 flaginfo
->symoff
+= outsym_size
;
5326 /* Link an a.out input BFD into the output file. */
5329 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
5331 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
5333 /* If this is a dynamic object, it may need special handling. */
5334 if ((input_bfd
->flags
& DYNAMIC
) != 0
5335 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
5336 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
5337 (flaginfo
->info
, input_bfd
));
5339 /* Get the symbols. We probably have them already, unless
5340 flaginfo->info->keep_memory is FALSE. */
5341 if (! aout_get_external_symbols (input_bfd
))
5344 /* Write out the symbols and get a map of the new indices. The map
5345 is placed into flaginfo->symbol_map. */
5346 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
5349 /* Relocate and write out the sections. These functions use the
5350 symbol map created by aout_link_write_symbols. The linker_mark
5351 field will be set if these sections are to be included in the
5352 link, which will normally be the case. */
5353 if (obj_textsec (input_bfd
)->linker_mark
)
5355 if (! aout_link_input_section (flaginfo
, input_bfd
,
5356 obj_textsec (input_bfd
),
5358 exec_hdr (input_bfd
)->a_trsize
))
5361 if (obj_datasec (input_bfd
)->linker_mark
)
5363 if (! aout_link_input_section (flaginfo
, input_bfd
,
5364 obj_datasec (input_bfd
),
5366 exec_hdr (input_bfd
)->a_drsize
))
5370 /* If we are not keeping memory, we don't need the symbols any
5371 longer. We still need them if we are keeping memory, because the
5372 strings in the hash table point into them. */
5373 if (! flaginfo
->info
->keep_memory
)
5375 if (! aout_link_free_symbols (input_bfd
))
5382 /* Do the final link step. This is called on the output BFD. The
5383 INFO structure should point to a list of BFDs linked through the
5384 link.next field which can be used to find each BFD which takes part
5385 in the output. Also, each section in ABFD should point to a list
5386 of bfd_link_order structures which list all the input sections for
5387 the output section. */
5390 NAME (aout
, final_link
) (bfd
*abfd
,
5391 struct bfd_link_info
*info
,
5392 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
5394 struct aout_final_link_info aout_info
;
5395 bfd_boolean includes_hash_initialized
= FALSE
;
5397 bfd_size_type trsize
, drsize
;
5398 bfd_size_type max_contents_size
;
5399 bfd_size_type max_relocs_size
;
5400 bfd_size_type max_sym_count
;
5401 struct bfd_link_order
*p
;
5403 bfd_boolean have_link_order_relocs
;
5405 if (bfd_link_pic (info
))
5406 abfd
->flags
|= DYNAMIC
;
5408 aout_info
.info
= info
;
5409 aout_info
.output_bfd
= abfd
;
5410 aout_info
.contents
= NULL
;
5411 aout_info
.relocs
= NULL
;
5412 aout_info
.symbol_map
= NULL
;
5413 aout_info
.output_syms
= NULL
;
5415 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
5416 aout_link_includes_newfunc
,
5417 sizeof (struct aout_link_includes_entry
),
5420 includes_hash_initialized
= TRUE
;
5422 /* Figure out the largest section size. Also, if generating
5423 relocatable output, count the relocs. */
5426 max_contents_size
= 0;
5427 max_relocs_size
= 0;
5429 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5433 if (bfd_link_relocatable (info
))
5435 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5437 trsize
+= exec_hdr (sub
)->a_trsize
;
5438 drsize
+= exec_hdr (sub
)->a_drsize
;
5442 /* FIXME: We need to identify the .text and .data sections
5443 and call get_reloc_upper_bound and canonicalize_reloc to
5444 work out the number of relocs needed, and then multiply
5445 by the reloc size. */
5447 /* xgettext:c-format */
5448 (_("%pB: relocatable link from %s to %s not supported"),
5449 abfd
, sub
->xvec
->name
, abfd
->xvec
->name
);
5450 bfd_set_error (bfd_error_invalid_operation
);
5455 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5457 sz
= obj_textsec (sub
)->size
;
5458 if (sz
> max_contents_size
)
5459 max_contents_size
= sz
;
5460 sz
= obj_datasec (sub
)->size
;
5461 if (sz
> max_contents_size
)
5462 max_contents_size
= sz
;
5464 sz
= exec_hdr (sub
)->a_trsize
;
5465 if (sz
> max_relocs_size
)
5466 max_relocs_size
= sz
;
5467 sz
= exec_hdr (sub
)->a_drsize
;
5468 if (sz
> max_relocs_size
)
5469 max_relocs_size
= sz
;
5471 sz
= obj_aout_external_sym_count (sub
);
5472 if (sz
> max_sym_count
)
5477 if (bfd_link_relocatable (info
))
5479 if (obj_textsec (abfd
) != NULL
)
5480 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
5481 ->map_head
.link_order
)
5482 * obj_reloc_entry_size (abfd
));
5483 if (obj_datasec (abfd
) != NULL
)
5484 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
5485 ->map_head
.link_order
)
5486 * obj_reloc_entry_size (abfd
));
5489 exec_hdr (abfd
)->a_trsize
= trsize
;
5490 exec_hdr (abfd
)->a_drsize
= drsize
;
5492 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
5494 /* Adjust the section sizes and vmas according to the magic number.
5495 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5496 filepos for each section. */
5497 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
5500 /* The relocation and symbol file positions differ among a.out
5501 targets. We are passed a callback routine from the backend
5502 specific code to handle this.
5503 FIXME: At this point we do not know how much space the symbol
5504 table will require. This will not work for any (nonstandard)
5505 a.out target that needs to know the symbol table size before it
5506 can compute the relocation file positions. This may or may not
5507 be the case for the hp300hpux target, for example. */
5508 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
5510 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
5511 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
5512 obj_sym_filepos (abfd
) = aout_info
.symoff
;
5514 /* We keep a count of the symbols as we output them. */
5515 obj_aout_external_sym_count (abfd
) = 0;
5517 /* We accumulate the string table as we write out the symbols. */
5518 aout_info
.strtab
= _bfd_stringtab_init ();
5519 if (aout_info
.strtab
== NULL
)
5522 /* Allocate buffers to hold section contents and relocs. */
5523 aout_info
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5524 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
5525 aout_info
.symbol_map
= (int *) bfd_malloc (max_sym_count
* sizeof (int));
5526 aout_info
.output_syms
= (struct external_nlist
*)
5527 bfd_malloc ((max_sym_count
+ 1) * sizeof (struct external_nlist
));
5528 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
5529 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
5530 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
5531 || aout_info
.output_syms
== NULL
)
5534 /* If we have a symbol named __DYNAMIC, force it out now. This is
5535 required by SunOS. Doing this here rather than in sunos.c is a
5536 hack, but it's easier than exporting everything which would be
5539 struct aout_link_hash_entry
*h
;
5541 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
5542 FALSE
, FALSE
, FALSE
);
5544 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
5547 /* The most time efficient way to do the link would be to read all
5548 the input object files into memory and then sort out the
5549 information into the output file. Unfortunately, that will
5550 probably use too much memory. Another method would be to step
5551 through everything that composes the text section and write it
5552 out, and then everything that composes the data section and write
5553 it out, and then write out the relocs, and then write out the
5554 symbols. Unfortunately, that requires reading stuff from each
5555 input file several times, and we will not be able to keep all the
5556 input files open simultaneously, and reopening them will be slow.
5558 What we do is basically process one input file at a time. We do
5559 everything we need to do with an input file once--copy over the
5560 section contents, handle the relocation information, and write
5561 out the symbols--and then we throw away the information we read
5562 from it. This approach requires a lot of lseeks of the output
5563 file, which is unfortunate but still faster than reopening a lot
5566 We use the output_has_begun field of the input BFDs to see
5567 whether we have already handled it. */
5568 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5569 sub
->output_has_begun
= FALSE
;
5571 /* Mark all sections which are to be included in the link. This
5572 will normally be every section. We need to do this so that we
5573 can identify any sections which the linker has decided to not
5575 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5577 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5578 if (p
->type
== bfd_indirect_link_order
)
5579 p
->u
.indirect
.section
->linker_mark
= TRUE
;
5582 have_link_order_relocs
= FALSE
;
5583 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5585 for (p
= o
->map_head
.link_order
;
5589 if (p
->type
== bfd_indirect_link_order
5590 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
5591 == bfd_target_aout_flavour
))
5595 input_bfd
= p
->u
.indirect
.section
->owner
;
5596 if (! input_bfd
->output_has_begun
)
5598 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
5600 input_bfd
->output_has_begun
= TRUE
;
5603 else if (p
->type
== bfd_section_reloc_link_order
5604 || p
->type
== bfd_symbol_reloc_link_order
)
5606 /* These are handled below. */
5607 have_link_order_relocs
= TRUE
;
5611 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5617 /* Write out any symbols that we have not already written out. */
5618 bfd_hash_traverse (&info
->hash
->table
,
5619 aout_link_write_other_symbol
,
5622 /* Now handle any relocs we were asked to create by the linker.
5623 These did not come from any input file. We must do these after
5624 we have written out all the symbols, so that we know the symbol
5626 if (have_link_order_relocs
)
5628 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5630 for (p
= o
->map_head
.link_order
;
5634 if (p
->type
== bfd_section_reloc_link_order
5635 || p
->type
== bfd_symbol_reloc_link_order
)
5637 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
5644 if (aout_info
.contents
!= NULL
)
5646 free (aout_info
.contents
);
5647 aout_info
.contents
= NULL
;
5649 if (aout_info
.relocs
!= NULL
)
5651 free (aout_info
.relocs
);
5652 aout_info
.relocs
= NULL
;
5654 if (aout_info
.symbol_map
!= NULL
)
5656 free (aout_info
.symbol_map
);
5657 aout_info
.symbol_map
= NULL
;
5659 if (aout_info
.output_syms
!= NULL
)
5661 free (aout_info
.output_syms
);
5662 aout_info
.output_syms
= NULL
;
5664 if (includes_hash_initialized
)
5666 bfd_hash_table_free (&aout_info
.includes
.root
);
5667 includes_hash_initialized
= FALSE
;
5670 /* Finish up any dynamic linking we may be doing. */
5671 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
5673 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
5677 /* Update the header information. */
5678 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
5679 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
5680 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
5681 obj_textsec (abfd
)->reloc_count
=
5682 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
5683 obj_datasec (abfd
)->reloc_count
=
5684 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
5686 /* Write out the string table, unless there are no symbols. */
5687 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
5689 if (abfd
->symcount
> 0)
5691 if (!emit_stringtab (abfd
, aout_info
.strtab
))
5696 bfd_byte b
[BYTES_IN_WORD
];
5698 memset (b
, 0, BYTES_IN_WORD
);
5699 if (bfd_bwrite (b
, (bfd_size_type
) BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
5706 if (aout_info
.contents
!= NULL
)
5707 free (aout_info
.contents
);
5708 if (aout_info
.relocs
!= NULL
)
5709 free (aout_info
.relocs
);
5710 if (aout_info
.symbol_map
!= NULL
)
5711 free (aout_info
.symbol_map
);
5712 if (aout_info
.output_syms
!= NULL
)
5713 free (aout_info
.output_syms
);
5714 if (includes_hash_initialized
)
5715 bfd_hash_table_free (&aout_info
.includes
.root
);