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 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1740 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1741 in
->other
= H_GET_8 (abfd
, ext
->e_other
);
1742 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1743 in
->symbol
.udata
.p
= NULL
;
1745 if (! translate_from_native_sym_flags (abfd
, in
))
1749 in
->symbol
.flags
|= BSF_DYNAMIC
;
1755 /* We read the symbols into a buffer, which is discarded when this
1756 function exits. We read the strings into a buffer large enough to
1757 hold them all plus all the cached symbol entries. */
1760 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1762 struct external_nlist
*old_external_syms
;
1763 aout_symbol_type
*cached
;
1764 bfd_size_type cached_size
;
1766 /* If there's no work to be done, don't do any. */
1767 if (obj_aout_symbols (abfd
) != NULL
)
1770 old_external_syms
= obj_aout_external_syms (abfd
);
1772 if (! aout_get_external_symbols (abfd
))
1775 cached_size
= obj_aout_external_sym_count (abfd
);
1776 if (cached_size
== 0)
1777 return TRUE
; /* Nothing to do. */
1779 cached_size
*= sizeof (aout_symbol_type
);
1780 cached
= (aout_symbol_type
*) bfd_zmalloc (cached_size
);
1784 /* Convert from external symbol information to internal. */
1785 if (! (NAME (aout
, translate_symbol_table
)
1787 obj_aout_external_syms (abfd
),
1788 obj_aout_external_sym_count (abfd
),
1789 obj_aout_external_strings (abfd
),
1790 obj_aout_external_string_size (abfd
),
1797 bfd_get_symcount (abfd
) = obj_aout_external_sym_count (abfd
);
1799 obj_aout_symbols (abfd
) = cached
;
1801 /* It is very likely that anybody who calls this function will not
1802 want the external symbol information, so if it was allocated
1803 because of our call to aout_get_external_symbols, we free it up
1804 right away to save space. */
1805 if (old_external_syms
== NULL
1806 && obj_aout_external_syms (abfd
) != NULL
)
1809 bfd_free_window (&obj_aout_sym_window (abfd
));
1811 free (obj_aout_external_syms (abfd
));
1813 obj_aout_external_syms (abfd
) = NULL
;
1819 /* We use a hash table when writing out symbols so that we only write
1820 out a particular string once. This helps particularly when the
1821 linker writes out stabs debugging entries, because each different
1822 contributing object file tends to have many duplicate stabs
1825 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1826 if BFD_TRADITIONAL_FORMAT is set. */
1828 /* Get the index of a string in a strtab, adding it if it is not
1831 static inline bfd_size_type
1832 add_to_stringtab (bfd
*abfd
,
1833 struct bfd_strtab_hash
*tab
,
1838 bfd_size_type str_index
;
1840 /* An index of 0 always means the empty string. */
1841 if (str
== 0 || *str
== '\0')
1844 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1845 doesn't understand a hashed string table. */
1847 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1850 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1852 if (str_index
!= (bfd_size_type
) -1)
1853 /* Add BYTES_IN_WORD to the return value to account for the
1854 space taken up by the string table size. */
1855 str_index
+= BYTES_IN_WORD
;
1860 /* Write out a strtab. ABFD is already at the right location in the
1864 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1866 bfd_byte buffer
[BYTES_IN_WORD
];
1867 bfd_size_type amt
= BYTES_IN_WORD
;
1869 /* The string table starts with the size. */
1870 PUT_WORD (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_WORD
, buffer
);
1871 if (bfd_bwrite ((void *) buffer
, amt
, abfd
) != amt
)
1874 return _bfd_stringtab_emit (abfd
, tab
);
1878 NAME (aout
, write_syms
) (bfd
*abfd
)
1880 unsigned int count
;
1881 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1882 struct bfd_strtab_hash
*strtab
;
1884 strtab
= _bfd_stringtab_init ();
1888 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1890 asymbol
*g
= generic
[count
];
1892 struct external_nlist nsp
;
1895 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, FALSE
);
1896 if (indx
== (bfd_size_type
) -1)
1898 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1900 if (bfd_asymbol_flavour (g
) == abfd
->xvec
->flavour
)
1902 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1903 H_PUT_8 (abfd
, aout_symbol (g
)->other
, nsp
.e_other
);
1904 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1908 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1909 H_PUT_8 (abfd
, 0, nsp
.e_other
);
1910 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1913 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1916 amt
= EXTERNAL_NLIST_SIZE
;
1917 if (bfd_bwrite ((void *) &nsp
, amt
, abfd
) != amt
)
1920 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1921 here, at the end. */
1925 if (! emit_stringtab (abfd
, strtab
))
1928 _bfd_stringtab_free (strtab
);
1933 _bfd_stringtab_free (strtab
);
1938 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1940 unsigned int counter
= 0;
1941 aout_symbol_type
*symbase
;
1943 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1946 for (symbase
= obj_aout_symbols (abfd
);
1947 counter
++ < bfd_get_symcount (abfd
);
1949 *(location
++) = (asymbol
*) (symbase
++);
1951 return bfd_get_symcount (abfd
);
1954 /* Standard reloc stuff. */
1955 /* Output standard relocation information to a file in target byte order. */
1957 extern void NAME (aout
, swap_std_reloc_out
)
1958 (bfd
*, arelent
*, struct reloc_std_external
*);
1961 NAME (aout
, swap_std_reloc_out
) (bfd
*abfd
,
1963 struct reloc_std_external
*natptr
)
1966 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1968 unsigned int r_length
;
1970 int r_baserel
, r_jmptable
, r_relative
;
1971 asection
*output_section
= sym
->section
->output_section
;
1973 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
1975 BFD_ASSERT (g
->howto
!= NULL
);
1976 r_length
= g
->howto
->size
; /* Size as a power of two. */
1977 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1978 /* XXX This relies on relocs coming from a.out files. */
1979 r_baserel
= (g
->howto
->type
& 8) != 0;
1980 r_jmptable
= (g
->howto
->type
& 16) != 0;
1981 r_relative
= (g
->howto
->type
& 32) != 0;
1983 /* Name was clobbered by aout_write_syms to be symbol index. */
1985 /* If this relocation is relative to a symbol then set the
1986 r_index to the symbols index, and the r_extern bit.
1988 Absolute symbols can come in in two ways, either as an offset
1989 from the abs section, or as a symbol which has an abs value.
1990 check for that here. */
1992 if (bfd_is_com_section (output_section
)
1993 || bfd_is_abs_section (output_section
)
1994 || bfd_is_und_section (output_section
)
1995 /* PR gas/3041 a.out relocs against weak symbols
1996 must be treated as if they were against externs. */
1997 || (sym
->flags
& BSF_WEAK
))
1999 if (bfd_abs_section_ptr
->symbol
== sym
)
2001 /* Whoops, looked like an abs symbol, but is
2002 really an offset from the abs section. */
2008 /* Fill in symbol. */
2010 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2015 /* Just an ordinary section. */
2017 r_index
= output_section
->target_index
;
2020 /* Now the fun stuff. */
2021 if (bfd_header_big_endian (abfd
))
2023 natptr
->r_index
[0] = r_index
>> 16;
2024 natptr
->r_index
[1] = r_index
>> 8;
2025 natptr
->r_index
[2] = r_index
;
2026 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2027 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2028 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2029 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2030 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2031 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
2035 natptr
->r_index
[2] = r_index
>> 16;
2036 natptr
->r_index
[1] = r_index
>> 8;
2037 natptr
->r_index
[0] = r_index
;
2038 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2039 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2040 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2041 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2042 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2043 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
2047 /* Extended stuff. */
2048 /* Output extended relocation information to a file in target byte order. */
2050 extern void NAME (aout
, swap_ext_reloc_out
)
2051 (bfd
*, arelent
*, struct reloc_ext_external
*);
2054 NAME (aout
, swap_ext_reloc_out
) (bfd
*abfd
,
2056 struct reloc_ext_external
*natptr
)
2060 unsigned int r_type
;
2062 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2063 asection
*output_section
= sym
->section
->output_section
;
2065 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2067 r_type
= (unsigned int) g
->howto
->type
;
2069 r_addend
= g
->addend
;
2070 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2071 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2073 /* If this relocation is relative to a symbol then set the
2074 r_index to the symbols index, and the r_extern bit.
2076 Absolute symbols can come in in two ways, either as an offset
2077 from the abs section, or as a symbol which has an abs value.
2078 check for that here. */
2079 if (bfd_is_abs_section (bfd_get_section (sym
)))
2084 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2086 if (bfd_is_und_section (bfd_get_section (sym
))
2087 || (sym
->flags
& BSF_GLOBAL
) != 0)
2091 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2095 /* Just an ordinary section. */
2097 r_index
= output_section
->target_index
;
2100 /* Now the fun stuff. */
2101 if (bfd_header_big_endian (abfd
))
2103 natptr
->r_index
[0] = r_index
>> 16;
2104 natptr
->r_index
[1] = r_index
>> 8;
2105 natptr
->r_index
[2] = r_index
;
2106 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2107 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2111 natptr
->r_index
[2] = r_index
>> 16;
2112 natptr
->r_index
[1] = r_index
>> 8;
2113 natptr
->r_index
[0] = r_index
;
2114 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2115 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
));
2118 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2121 /* BFD deals internally with all things based from the section they're
2122 in. so, something in 10 bytes into a text section with a base of
2123 50 would have a symbol (.text+10) and know .text vma was 50.
2125 Aout keeps all it's symbols based from zero, so the symbol would
2126 contain 60. This macro subs the base of each section from the value
2127 to give the true offset from the section. */
2129 #define MOVE_ADDRESS(ad) \
2132 /* Undefined symbol. */ \
2133 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2134 cache_ptr->addend = ad; \
2138 /* Defined, section relative. Replace symbol with pointer to \
2139 symbol which points to section. */ \
2143 case N_TEXT | N_EXT: \
2144 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2145 cache_ptr->addend = ad - su->textsec->vma; \
2148 case N_DATA | N_EXT: \
2149 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2150 cache_ptr->addend = ad - su->datasec->vma; \
2153 case N_BSS | N_EXT: \
2154 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2155 cache_ptr->addend = ad - su->bsssec->vma; \
2159 case N_ABS | N_EXT: \
2160 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2161 cache_ptr->addend = ad; \
2167 NAME (aout
, swap_ext_reloc_in
) (bfd
*abfd
,
2168 struct reloc_ext_external
*bytes
,
2171 bfd_size_type symcount
)
2173 unsigned int r_index
;
2175 unsigned int r_type
;
2176 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2178 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2180 /* Now the fun stuff. */
2181 if (bfd_header_big_endian (abfd
))
2183 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2184 | ((unsigned int) bytes
->r_index
[1] << 8)
2185 | bytes
->r_index
[2]);
2186 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2187 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2188 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
2192 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2193 | ((unsigned int) bytes
->r_index
[1] << 8)
2194 | bytes
->r_index
[0]);
2195 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2196 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2197 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2200 if (r_type
< TABLE_SIZE (howto_table_ext
))
2201 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2203 cache_ptr
->howto
= NULL
;
2205 /* Base relative relocs are always against the symbol table,
2206 regardless of the setting of r_extern. r_extern just reflects
2207 whether the symbol the reloc is against is local or global. */
2208 if (r_type
== (unsigned int) RELOC_BASE10
2209 || r_type
== (unsigned int) RELOC_BASE13
2210 || r_type
== (unsigned int) RELOC_BASE22
)
2213 if (r_extern
&& r_index
> symcount
)
2215 /* We could arrange to return an error, but it might be useful
2216 to see the file even if it is bad. */
2221 MOVE_ADDRESS (GET_SWORD (abfd
, bytes
->r_addend
));
2225 NAME (aout
, swap_std_reloc_in
) (bfd
*abfd
,
2226 struct reloc_std_external
*bytes
,
2229 bfd_size_type symcount
)
2231 unsigned int r_index
;
2233 unsigned int r_length
;
2235 int r_baserel
, r_jmptable
, r_relative
;
2236 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2237 unsigned int howto_idx
;
2239 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
2241 /* Now the fun stuff. */
2242 if (bfd_header_big_endian (abfd
))
2244 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2245 | ((unsigned int) bytes
->r_index
[1] << 8)
2246 | bytes
->r_index
[2]);
2247 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2248 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2249 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2250 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2251 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2252 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2253 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
2257 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2258 | ((unsigned int) bytes
->r_index
[1] << 8)
2259 | bytes
->r_index
[0]);
2260 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2261 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2262 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2263 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2264 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2265 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2266 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2269 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2270 + 16 * r_jmptable
+ 32 * r_relative
);
2271 if (howto_idx
< TABLE_SIZE (howto_table_std
))
2273 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2274 if (cache_ptr
->howto
->type
== (unsigned int) -1)
2275 cache_ptr
->howto
= NULL
;
2278 cache_ptr
->howto
= NULL
;
2280 /* Base relative relocs are always against the symbol table,
2281 regardless of the setting of r_extern. r_extern just reflects
2282 whether the symbol the reloc is against is local or global. */
2286 if (r_extern
&& r_index
> symcount
)
2288 /* We could arrange to return an error, but it might be useful
2289 to see the file even if it is bad. */
2297 /* Read and swap the relocs for a section. */
2300 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
2302 bfd_size_type count
;
2303 bfd_size_type reloc_size
;
2305 arelent
*reloc_cache
;
2307 unsigned int counter
= 0;
2311 if (asect
->relocation
)
2314 if (asect
->flags
& SEC_CONSTRUCTOR
)
2317 if (asect
== obj_datasec (abfd
))
2318 reloc_size
= exec_hdr (abfd
)->a_drsize
;
2319 else if (asect
== obj_textsec (abfd
))
2320 reloc_size
= exec_hdr (abfd
)->a_trsize
;
2321 else if (asect
== obj_bsssec (abfd
))
2325 bfd_set_error (bfd_error_invalid_operation
);
2329 if (reloc_size
== 0)
2330 return TRUE
; /* Nothing to be done. */
2332 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2335 each_size
= obj_reloc_entry_size (abfd
);
2337 count
= reloc_size
/ each_size
;
2339 return TRUE
; /* Nothing to be done. */
2341 amt
= count
* sizeof (arelent
);
2342 reloc_cache
= (arelent
*) bfd_zmalloc (amt
);
2343 if (reloc_cache
== NULL
)
2346 relocs
= bfd_malloc (reloc_size
);
2353 if (bfd_bread (relocs
, reloc_size
, abfd
) != reloc_size
)
2360 cache_ptr
= reloc_cache
;
2361 if (each_size
== RELOC_EXT_SIZE
)
2363 struct reloc_ext_external
*rptr
= (struct reloc_ext_external
*) relocs
;
2365 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2366 MY_swap_ext_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2367 (bfd_size_type
) bfd_get_symcount (abfd
));
2371 struct reloc_std_external
*rptr
= (struct reloc_std_external
*) relocs
;
2373 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2374 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2375 (bfd_size_type
) bfd_get_symcount (abfd
));
2380 asect
->relocation
= reloc_cache
;
2381 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2386 /* Write out a relocation section into an object file. */
2389 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2392 unsigned char *native
, *natptr
;
2395 unsigned int count
= section
->reloc_count
;
2396 bfd_size_type natsize
;
2398 if (count
== 0 || section
->orelocation
== NULL
)
2401 each_size
= obj_reloc_entry_size (abfd
);
2402 natsize
= (bfd_size_type
) each_size
* count
;
2403 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2407 generic
= section
->orelocation
;
2409 if (each_size
== RELOC_EXT_SIZE
)
2411 for (natptr
= native
;
2413 --count
, natptr
+= each_size
, ++generic
)
2415 /* PR 20921: If the howto field has not been initialised then skip
2417 PR 20929: Similarly for the symbol field. */
2418 if ((*generic
)->howto
== NULL
2419 || (*generic
)->sym_ptr_ptr
== NULL
)
2421 bfd_set_error (bfd_error_invalid_operation
);
2422 _bfd_error_handler (_("\
2423 %pB: attempt to write out unknown reloc type"), abfd
);
2426 MY_swap_ext_reloc_out (abfd
, *generic
,
2427 (struct reloc_ext_external
*) natptr
);
2432 for (natptr
= native
;
2434 --count
, natptr
+= each_size
, ++generic
)
2436 if ((*generic
)->howto
== NULL
2437 || (*generic
)->sym_ptr_ptr
== NULL
)
2439 bfd_set_error (bfd_error_invalid_operation
);
2440 _bfd_error_handler (_("\
2441 %pB: attempt to write out unknown reloc type"), abfd
);
2444 MY_swap_std_reloc_out (abfd
, *generic
,
2445 (struct reloc_std_external
*) natptr
);
2449 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2451 bfd_release (abfd
, native
);
2454 bfd_release (abfd
, native
);
2459 /* This is stupid. This function should be a boolean predicate. */
2462 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2467 arelent
*tblptr
= section
->relocation
;
2470 if (section
== obj_bsssec (abfd
))
2476 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
) (abfd
, section
, symbols
)))
2479 if (section
->flags
& SEC_CONSTRUCTOR
)
2481 arelent_chain
*chain
= section
->constructor_chain
;
2482 for (count
= 0; count
< section
->reloc_count
; count
++)
2484 *relptr
++ = &chain
->relent
;
2485 chain
= chain
->next
;
2490 tblptr
= section
->relocation
;
2492 for (count
= 0; count
++ < section
->reloc_count
; )
2494 *relptr
++ = tblptr
++;
2499 return section
->reloc_count
;
2503 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2505 if (bfd_get_format (abfd
) != bfd_object
)
2507 bfd_set_error (bfd_error_invalid_operation
);
2511 if (asect
->flags
& SEC_CONSTRUCTOR
)
2512 return sizeof (arelent
*) * (asect
->reloc_count
+ 1);
2514 if (asect
== obj_datasec (abfd
))
2515 return sizeof (arelent
*)
2516 * ((exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
))
2519 if (asect
== obj_textsec (abfd
))
2520 return sizeof (arelent
*)
2521 * ((exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
))
2524 if (asect
== obj_bsssec (abfd
))
2525 return sizeof (arelent
*);
2527 if (asect
== obj_bsssec (abfd
))
2530 bfd_set_error (bfd_error_invalid_operation
);
2535 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2537 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2540 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2544 NAME (aout
, get_lineno
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2545 asymbol
*ignore_symbol ATTRIBUTE_UNUSED
)
2551 NAME (aout
, get_symbol_info
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2555 bfd_symbol_info (symbol
, ret
);
2557 if (ret
->type
== '?')
2559 int type_code
= aout_symbol (symbol
)->type
& 0xff;
2560 const char *stab_name
= bfd_get_stab_name (type_code
);
2561 static char buf
[10];
2563 if (stab_name
== NULL
)
2565 sprintf (buf
, "(%d)", type_code
);
2569 ret
->stab_type
= type_code
;
2570 ret
->stab_other
= (unsigned) (aout_symbol (symbol
)->other
& 0xff);
2571 ret
->stab_desc
= (unsigned) (aout_symbol (symbol
)->desc
& 0xffff);
2572 ret
->stab_name
= stab_name
;
2577 NAME (aout
, print_symbol
) (bfd
*abfd
,
2580 bfd_print_symbol_type how
)
2582 FILE *file
= (FILE *)afile
;
2586 case bfd_print_symbol_name
:
2588 fprintf (file
,"%s", symbol
->name
);
2590 case bfd_print_symbol_more
:
2591 fprintf (file
,"%4x %2x %2x",
2592 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2593 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2594 (unsigned) (aout_symbol (symbol
)->type
));
2596 case bfd_print_symbol_all
:
2598 const char *section_name
= symbol
->section
->name
;
2600 bfd_print_symbol_vandf (abfd
, (void *)file
, symbol
);
2602 fprintf (file
," %-5s %04x %02x %02x",
2604 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2605 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2606 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2608 fprintf (file
," %s", symbol
->name
);
2614 /* If we don't have to allocate more than 1MB to hold the generic
2615 symbols, we use the generic minisymbol methord: it's faster, since
2616 it only translates the symbols once, not multiple times. */
2617 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2619 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2620 symbols. The minisymbol_to_symbol function translates these into
2621 BFD asymbol structures. */
2624 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2625 bfd_boolean dynamic
,
2627 unsigned int *sizep
)
2630 /* We could handle the dynamic symbols here as well, but it's
2631 easier to hand them off. */
2632 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2634 if (! aout_get_external_symbols (abfd
))
2637 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2638 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2640 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2642 /* By passing the external symbols back from this routine, we are
2643 giving up control over the memory block. Clear
2644 obj_aout_external_syms, so that we do not try to free it
2646 obj_aout_external_syms (abfd
) = NULL
;
2648 *sizep
= EXTERNAL_NLIST_SIZE
;
2649 return obj_aout_external_sym_count (abfd
);
2652 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2653 unmodified a.out symbol. The SYM argument is a structure returned
2654 by bfd_make_empty_symbol, which we fill in here. */
2657 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2658 bfd_boolean dynamic
,
2659 const void * minisym
,
2663 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2664 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2666 memset (sym
, 0, sizeof (aout_symbol_type
));
2668 /* We call translate_symbol_table to translate a single symbol. */
2669 if (! (NAME (aout
, translate_symbol_table
)
2671 (aout_symbol_type
*) sym
,
2672 (struct external_nlist
*) minisym
,
2674 obj_aout_external_strings (abfd
),
2675 obj_aout_external_string_size (abfd
),
2682 /* Provided a BFD, a section and an offset into the section, calculate
2683 and return the name of the source file and the line nearest to the
2687 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2691 const char **filename_ptr
,
2692 const char **functionname_ptr
,
2693 unsigned int *line_ptr
,
2694 unsigned int *disriminator_ptr
)
2696 /* Run down the file looking for the filename, function and linenumber. */
2698 const char *directory_name
= NULL
;
2699 const char *main_file_name
= NULL
;
2700 const char *current_file_name
= NULL
;
2701 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2702 const char *line_directory_name
= NULL
; /* Value of directory_name at line number. */
2703 bfd_vma low_line_vma
= 0;
2704 bfd_vma low_func_vma
= 0;
2706 bfd_size_type filelen
, funclen
;
2709 *filename_ptr
= abfd
->filename
;
2710 *functionname_ptr
= NULL
;
2712 if (disriminator_ptr
)
2713 *disriminator_ptr
= 0;
2715 if (symbols
!= NULL
)
2717 for (p
= symbols
; *p
; p
++)
2719 aout_symbol_type
*q
= (aout_symbol_type
*) (*p
);
2724 /* If this looks like a file name symbol, and it comes after
2725 the line number we have found so far, but before the
2726 offset, then we have probably not found the right line
2728 if (q
->symbol
.value
<= offset
2729 && ((q
->symbol
.value
> low_line_vma
2730 && (line_file_name
!= NULL
2732 || (q
->symbol
.value
> low_func_vma
2735 const char *symname
;
2737 symname
= q
->symbol
.name
;
2738 if (strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2740 if (q
->symbol
.value
> low_line_vma
)
2743 line_file_name
= NULL
;
2745 if (q
->symbol
.value
> low_func_vma
)
2752 /* If this symbol is less than the offset, but greater than
2753 the line number we have found so far, then we have not
2754 found the right line number. */
2755 if (q
->symbol
.value
<= offset
)
2757 if (q
->symbol
.value
> low_line_vma
)
2760 line_file_name
= NULL
;
2762 if (q
->symbol
.value
> low_func_vma
)
2766 main_file_name
= current_file_name
= q
->symbol
.name
;
2767 /* Look ahead to next symbol to check if that too is an N_SO. */
2771 q
= (aout_symbol_type
*) (*p
);
2772 if (q
->type
!= (int)N_SO
)
2775 /* Found a second N_SO First is directory; second is filename. */
2776 directory_name
= current_file_name
;
2777 main_file_name
= current_file_name
= q
->symbol
.name
;
2778 if (obj_textsec (abfd
) != section
)
2782 current_file_name
= q
->symbol
.name
;
2789 /* We'll keep this if it resolves nearer than the one we have
2791 if (q
->symbol
.value
>= low_line_vma
2792 && q
->symbol
.value
<= offset
)
2794 *line_ptr
= q
->desc
;
2795 low_line_vma
= q
->symbol
.value
;
2796 line_file_name
= current_file_name
;
2797 line_directory_name
= directory_name
;
2802 /* We'll keep this if it is nearer than the one we have already. */
2803 if (q
->symbol
.value
>= low_func_vma
&&
2804 q
->symbol
.value
<= offset
)
2806 low_func_vma
= q
->symbol
.value
;
2807 func
= (asymbol
*)q
;
2809 else if (q
->symbol
.value
> offset
)
2820 main_file_name
= line_file_name
;
2821 directory_name
= line_directory_name
;
2824 if (main_file_name
== NULL
2825 || IS_ABSOLUTE_PATH (main_file_name
)
2826 || directory_name
== NULL
)
2829 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2834 funclen
= strlen (bfd_asymbol_name (func
));
2836 if (adata (abfd
).line_buf
!= NULL
)
2837 free (adata (abfd
).line_buf
);
2839 if (filelen
+ funclen
== 0)
2840 adata (abfd
).line_buf
= buf
= NULL
;
2843 buf
= (char *) bfd_malloc (filelen
+ funclen
+ 3);
2844 adata (abfd
).line_buf
= buf
;
2849 if (main_file_name
!= NULL
)
2851 if (IS_ABSOLUTE_PATH (main_file_name
) || directory_name
== NULL
)
2852 *filename_ptr
= main_file_name
;
2856 /* PR binutils/20891: In a corrupt input file both
2857 main_file_name and directory_name can be empty... */
2858 * filename_ptr
= NULL
;
2861 snprintf (buf
, filelen
+ 1, "%s%s", directory_name
,
2863 *filename_ptr
= buf
;
2871 const char *function
= func
->name
;
2876 /* PR binutils/20892: In a corrupt input file func can be empty. */
2877 * functionname_ptr
= NULL
;
2880 /* The caller expects a symbol name. We actually have a
2881 function name, without the leading underscore. Put the
2882 underscore back in, so that the caller gets a symbol name. */
2883 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2884 strcpy (buf
, function
);
2887 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2888 strcpy (buf
+ 1, function
);
2890 /* Have to remove : stuff. */
2891 colon
= strchr (buf
, ':');
2894 *functionname_ptr
= buf
;
2901 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2902 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2904 return adata (abfd
).exec_bytes_size
;
2907 /* Free all information we have cached for this BFD. We can always
2908 read it again later if we need it. */
2911 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2915 if (bfd_get_format (abfd
) != bfd_object
2916 || abfd
->tdata
.aout_data
== NULL
)
2919 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2920 BFCI_FREE (obj_aout_symbols (abfd
));
2922 obj_aout_external_syms (abfd
) = 0;
2923 bfd_free_window (&obj_aout_sym_window (abfd
));
2924 bfd_free_window (&obj_aout_string_window (abfd
));
2925 obj_aout_external_strings (abfd
) = 0;
2927 BFCI_FREE (obj_aout_external_syms (abfd
));
2928 BFCI_FREE (obj_aout_external_strings (abfd
));
2930 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2931 BFCI_FREE (o
->relocation
);
2937 /* a.out link code. */
2939 /* Routine to create an entry in an a.out link hash table. */
2941 struct bfd_hash_entry
*
2942 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2943 struct bfd_hash_table
*table
,
2946 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2948 /* Allocate the structure if it has not already been allocated by a
2951 ret
= (struct aout_link_hash_entry
*) bfd_hash_allocate (table
,
2956 /* Call the allocation method of the superclass. */
2957 ret
= ((struct aout_link_hash_entry
*)
2958 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2962 /* Set local fields. */
2963 ret
->written
= FALSE
;
2967 return (struct bfd_hash_entry
*) ret
;
2970 /* Initialize an a.out link hash table. */
2973 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2975 struct bfd_hash_entry
*(*newfunc
)
2976 (struct bfd_hash_entry
*, struct bfd_hash_table
*,
2978 unsigned int entsize
)
2980 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2983 /* Create an a.out link hash table. */
2985 struct bfd_link_hash_table
*
2986 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2988 struct aout_link_hash_table
*ret
;
2989 bfd_size_type amt
= sizeof (* ret
);
2991 ret
= (struct aout_link_hash_table
*) bfd_malloc (amt
);
2995 if (!NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2996 NAME (aout
, link_hash_newfunc
),
2997 sizeof (struct aout_link_hash_entry
)))
3005 /* Add all symbols from an object file to the hash table. */
3008 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3010 bfd_boolean (*add_one_symbol
)
3011 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
3012 bfd_vma
, const char *, bfd_boolean
, bfd_boolean
,
3013 struct bfd_link_hash_entry
**);
3014 struct external_nlist
*syms
;
3015 bfd_size_type sym_count
;
3018 struct aout_link_hash_entry
**sym_hash
;
3019 struct external_nlist
*p
;
3020 struct external_nlist
*pend
;
3023 syms
= obj_aout_external_syms (abfd
);
3024 sym_count
= obj_aout_external_sym_count (abfd
);
3025 strings
= obj_aout_external_strings (abfd
);
3026 if (info
->keep_memory
)
3031 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
3033 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
3034 (abfd
, info
, &syms
, &sym_count
, &strings
)))
3039 return TRUE
; /* Nothing to do. */
3041 /* We keep a list of the linker hash table entries that correspond
3042 to particular symbols. We could just look them up in the hash
3043 table, but keeping the list is more efficient. Perhaps this
3044 should be conditional on info->keep_memory. */
3045 amt
= sym_count
* sizeof (struct aout_link_hash_entry
*);
3046 sym_hash
= (struct aout_link_hash_entry
**) bfd_alloc (abfd
, amt
);
3047 if (sym_hash
== NULL
)
3049 obj_aout_sym_hashes (abfd
) = sym_hash
;
3051 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
3052 if (add_one_symbol
== NULL
)
3053 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
3056 pend
= p
+ sym_count
;
3057 for (; p
< pend
; p
++, sym_hash
++)
3068 type
= H_GET_8 (abfd
, p
->e_type
);
3070 /* Ignore debugging symbols. */
3071 if ((type
& N_STAB
) != 0)
3074 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3075 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3077 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3078 value
= GET_WORD (abfd
, p
->e_value
);
3095 /* Ignore symbols that are not externally visible. */
3098 /* Ignore local indirect symbol. */
3103 case N_UNDF
| N_EXT
:
3106 section
= bfd_und_section_ptr
;
3110 section
= bfd_com_section_ptr
;
3113 section
= bfd_abs_section_ptr
;
3115 case N_TEXT
| N_EXT
:
3116 section
= obj_textsec (abfd
);
3117 value
-= bfd_get_section_vma (abfd
, section
);
3119 case N_DATA
| N_EXT
:
3120 case N_SETV
| N_EXT
:
3121 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3122 translate_from_native_sym_flags. */
3123 section
= obj_datasec (abfd
);
3124 value
-= bfd_get_section_vma (abfd
, section
);
3127 section
= obj_bsssec (abfd
);
3128 value
-= bfd_get_section_vma (abfd
, section
);
3130 case N_INDR
| N_EXT
:
3131 /* An indirect symbol. The next symbol is the symbol
3132 which this one really is. */
3133 /* See PR 20925 for a reproducer. */
3137 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3138 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3140 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3141 section
= bfd_ind_section_ptr
;
3142 flags
|= BSF_INDIRECT
;
3144 case N_COMM
| N_EXT
:
3145 section
= bfd_com_section_ptr
;
3147 case N_SETA
: case N_SETA
| N_EXT
:
3148 section
= bfd_abs_section_ptr
;
3149 flags
|= BSF_CONSTRUCTOR
;
3151 case N_SETT
: case N_SETT
| N_EXT
:
3152 section
= obj_textsec (abfd
);
3153 flags
|= BSF_CONSTRUCTOR
;
3154 value
-= bfd_get_section_vma (abfd
, section
);
3156 case N_SETD
: case N_SETD
| N_EXT
:
3157 section
= obj_datasec (abfd
);
3158 flags
|= BSF_CONSTRUCTOR
;
3159 value
-= bfd_get_section_vma (abfd
, section
);
3161 case N_SETB
: case N_SETB
| N_EXT
:
3162 section
= obj_bsssec (abfd
);
3163 flags
|= BSF_CONSTRUCTOR
;
3164 value
-= bfd_get_section_vma (abfd
, section
);
3167 /* A warning symbol. The next symbol is the one to warn
3168 about. If there is no next symbol, just look away. */
3173 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3174 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3176 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3177 section
= bfd_und_section_ptr
;
3178 flags
|= BSF_WARNING
;
3181 section
= bfd_und_section_ptr
;
3185 section
= bfd_abs_section_ptr
;
3189 section
= obj_textsec (abfd
);
3190 value
-= bfd_get_section_vma (abfd
, section
);
3194 section
= obj_datasec (abfd
);
3195 value
-= bfd_get_section_vma (abfd
, section
);
3199 section
= obj_bsssec (abfd
);
3200 value
-= bfd_get_section_vma (abfd
, section
);
3205 if (! ((*add_one_symbol
)
3206 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, FALSE
,
3207 (struct bfd_link_hash_entry
**) sym_hash
)))
3210 /* Restrict the maximum alignment of a common symbol based on
3211 the architecture, since a.out has no way to represent
3212 alignment requirements of a section in a .o file. FIXME:
3213 This isn't quite right: it should use the architecture of the
3214 output file, not the input files. */
3215 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3216 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3217 bfd_get_arch_info (abfd
)->section_align_power
))
3218 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3219 bfd_get_arch_info (abfd
)->section_align_power
;
3221 /* If this is a set symbol, and we are not building sets, then
3222 it is possible for the hash entry to not have been set. In
3223 such a case, treat the symbol as not globally defined. */
3224 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3226 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3230 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3237 /* Free up the internal symbols read from an a.out file. */
3240 aout_link_free_symbols (bfd
*abfd
)
3242 if (obj_aout_external_syms (abfd
) != NULL
)
3245 bfd_free_window (&obj_aout_sym_window (abfd
));
3247 free ((void *) obj_aout_external_syms (abfd
));
3249 obj_aout_external_syms (abfd
) = NULL
;
3251 if (obj_aout_external_strings (abfd
) != NULL
)
3254 bfd_free_window (&obj_aout_string_window (abfd
));
3256 free ((void *) obj_aout_external_strings (abfd
));
3258 obj_aout_external_strings (abfd
) = NULL
;
3263 /* Add symbols from an a.out object file. */
3266 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3268 if (! aout_get_external_symbols (abfd
))
3270 if (! aout_link_add_symbols (abfd
, info
))
3272 if (! info
->keep_memory
)
3274 if (! aout_link_free_symbols (abfd
))
3280 /* Look through the internal symbols to see if this object file should
3281 be included in the link. We should include this object file if it
3282 defines any symbols which are currently undefined. If this object
3283 file defines a common symbol, then we may adjust the size of the
3284 known symbol but we do not include the object file in the link
3285 (unless there is some other reason to include it). */
3288 aout_link_check_ar_symbols (bfd
*abfd
,
3289 struct bfd_link_info
*info
,
3290 bfd_boolean
*pneeded
,
3293 struct external_nlist
*p
;
3294 struct external_nlist
*pend
;
3299 /* Look through all the symbols. */
3300 p
= obj_aout_external_syms (abfd
);
3301 pend
= p
+ obj_aout_external_sym_count (abfd
);
3302 strings
= obj_aout_external_strings (abfd
);
3303 for (; p
< pend
; p
++)
3305 int type
= H_GET_8 (abfd
, p
->e_type
);
3307 struct bfd_link_hash_entry
*h
;
3309 /* Ignore symbols that are not externally visible. This is an
3310 optimization only, as we check the type more thoroughly
3312 if (((type
& N_EXT
) == 0
3313 || (type
& N_STAB
) != 0
3320 if (type
== N_WARNING
3326 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3327 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
3329 /* We are only interested in symbols that are currently
3330 undefined or common. */
3332 || (h
->type
!= bfd_link_hash_undefined
3333 && h
->type
!= bfd_link_hash_common
))
3335 if (type
== (N_INDR
| N_EXT
))
3340 if (type
== (N_TEXT
| N_EXT
)
3341 || type
== (N_DATA
| N_EXT
)
3342 || type
== (N_BSS
| N_EXT
)
3343 || type
== (N_ABS
| N_EXT
)
3344 || type
== (N_INDR
| N_EXT
))
3346 /* This object file defines this symbol. We must link it
3347 in. This is true regardless of whether the current
3348 definition of the symbol is undefined or common.
3350 If the current definition is common, we have a case in
3351 which we have already seen an object file including:
3353 and this object file from the archive includes:
3355 In such a case, whether to include this object is target
3356 dependant for backward compatibility.
3358 FIXME: The SunOS 4.1.3 linker will pull in the archive
3359 element if the symbol is defined in the .data section,
3360 but not if it is defined in the .text section. That
3361 seems a bit crazy to me, and it has not been implemented
3362 yet. However, it might be correct. */
3363 if (h
->type
== bfd_link_hash_common
)
3367 switch (info
->common_skip_ar_symbols
)
3369 case bfd_link_common_skip_none
:
3371 case bfd_link_common_skip_text
:
3372 skip
= (type
== (N_TEXT
| N_EXT
));
3374 case bfd_link_common_skip_data
:
3375 skip
= (type
== (N_DATA
| N_EXT
));
3377 case bfd_link_common_skip_all
:
3386 if (!(*info
->callbacks
3387 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3393 if (type
== (N_UNDF
| N_EXT
))
3397 value
= GET_WORD (abfd
, p
->e_value
);
3400 /* This symbol is common in the object from the archive
3402 if (h
->type
== bfd_link_hash_undefined
)
3407 symbfd
= h
->u
.undef
.abfd
;
3410 /* This symbol was created as undefined from
3411 outside BFD. We assume that we should link
3412 in the object file. This is done for the -u
3413 option in the linker. */
3414 if (!(*info
->callbacks
3415 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3420 /* Turn the current link symbol into a common
3421 symbol. It is already on the undefs list. */
3422 h
->type
= bfd_link_hash_common
;
3423 h
->u
.c
.p
= (struct bfd_link_hash_common_entry
*)
3424 bfd_hash_allocate (&info
->hash
->table
,
3425 sizeof (struct bfd_link_hash_common_entry
));
3426 if (h
->u
.c
.p
== NULL
)
3429 h
->u
.c
.size
= value
;
3431 /* FIXME: This isn't quite right. The maximum
3432 alignment of a common symbol should be set by the
3433 architecture of the output file, not of the input
3435 power
= bfd_log2 (value
);
3436 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3437 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3438 h
->u
.c
.p
->alignment_power
= power
;
3440 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3445 /* Adjust the size of the common symbol if
3447 if (value
> h
->u
.c
.size
)
3448 h
->u
.c
.size
= value
;
3458 /* This symbol is weak but defined. We must pull it in if
3459 the current link symbol is undefined, but we don't want
3460 it if the current link symbol is common. */
3461 if (h
->type
== bfd_link_hash_undefined
)
3463 if (!(*info
->callbacks
3464 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3472 /* We do not need this object file. */
3475 /* Check a single archive element to see if we need to include it in
3476 the link. *PNEEDED is set according to whether this element is
3477 needed in the link or not. This is called from
3478 _bfd_generic_link_add_archive_symbols. */
3481 aout_link_check_archive_element (bfd
*abfd
,
3482 struct bfd_link_info
*info
,
3483 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3484 const char *name ATTRIBUTE_UNUSED
,
3485 bfd_boolean
*pneeded
)
3490 if (!aout_get_external_symbols (abfd
))
3494 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
3500 /* Potentially, the add_archive_element hook may have set a
3501 substitute BFD for us. */
3504 if (!info
->keep_memory
3505 && !aout_link_free_symbols (oldbfd
))
3507 if (!aout_get_external_symbols (abfd
))
3510 if (!aout_link_add_symbols (abfd
, info
))
3514 if (!info
->keep_memory
|| !needed
)
3516 if (!aout_link_free_symbols (abfd
))
3523 /* Given an a.out BFD, add symbols to the global hash table as
3527 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
3529 switch (bfd_get_format (abfd
))
3532 return aout_link_add_object_symbols (abfd
, info
);
3534 return _bfd_generic_link_add_archive_symbols
3535 (abfd
, info
, aout_link_check_archive_element
);
3537 bfd_set_error (bfd_error_wrong_format
);
3542 /* A hash table used for header files with N_BINCL entries. */
3544 struct aout_link_includes_table
3546 struct bfd_hash_table root
;
3549 /* A linked list of totals that we have found for a particular header
3552 struct aout_link_includes_totals
3554 struct aout_link_includes_totals
*next
;
3558 /* An entry in the header file hash table. */
3560 struct aout_link_includes_entry
3562 struct bfd_hash_entry root
;
3563 /* List of totals we have found for this file. */
3564 struct aout_link_includes_totals
*totals
;
3567 /* Look up an entry in an the header file hash table. */
3569 #define aout_link_includes_lookup(table, string, create, copy) \
3570 ((struct aout_link_includes_entry *) \
3571 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3573 /* During the final link step we need to pass around a bunch of
3574 information, so we do it in an instance of this structure. */
3576 struct aout_final_link_info
3578 /* General link information. */
3579 struct bfd_link_info
*info
;
3582 /* Reloc file positions. */
3583 file_ptr treloff
, dreloff
;
3584 /* File position of symbols. */
3587 struct bfd_strtab_hash
*strtab
;
3588 /* Header file hash table. */
3589 struct aout_link_includes_table includes
;
3590 /* A buffer large enough to hold the contents of any section. */
3592 /* A buffer large enough to hold the relocs of any section. */
3594 /* A buffer large enough to hold the symbol map of any input BFD. */
3596 /* A buffer large enough to hold output symbols of any input BFD. */
3597 struct external_nlist
*output_syms
;
3600 /* The function to create a new entry in the header file hash table. */
3602 static struct bfd_hash_entry
*
3603 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3604 struct bfd_hash_table
*table
,
3607 struct aout_link_includes_entry
*ret
=
3608 (struct aout_link_includes_entry
*) entry
;
3610 /* Allocate the structure if it has not already been allocated by a
3613 ret
= (struct aout_link_includes_entry
*)
3614 bfd_hash_allocate (table
, sizeof (* ret
));
3618 /* Call the allocation method of the superclass. */
3619 ret
= ((struct aout_link_includes_entry
*)
3620 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3623 /* Set local fields. */
3627 return (struct bfd_hash_entry
*) ret
;
3630 /* Write out a symbol that was not associated with an a.out input
3634 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3636 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3637 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3641 struct external_nlist outsym
;
3645 if (h
->root
.type
== bfd_link_hash_warning
)
3647 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3648 if (h
->root
.type
== bfd_link_hash_new
)
3652 output_bfd
= flaginfo
->output_bfd
;
3654 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3656 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3657 (output_bfd
, flaginfo
->info
, h
)))
3659 /* FIXME: No way to handle errors. */
3669 /* An indx of -2 means the symbol must be written. */
3671 && (flaginfo
->info
->strip
== strip_all
3672 || (flaginfo
->info
->strip
== strip_some
3673 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3674 FALSE
, FALSE
) == NULL
)))
3677 switch (h
->root
.type
)
3680 case bfd_link_hash_warning
:
3682 /* Avoid variable not initialized warnings. */
3684 case bfd_link_hash_new
:
3685 /* This can happen for set symbols when sets are not being
3688 case bfd_link_hash_undefined
:
3689 type
= N_UNDF
| N_EXT
;
3692 case bfd_link_hash_defined
:
3693 case bfd_link_hash_defweak
:
3697 sec
= h
->root
.u
.def
.section
->output_section
;
3698 BFD_ASSERT (bfd_is_abs_section (sec
)
3699 || sec
->owner
== output_bfd
);
3700 if (sec
== obj_textsec (output_bfd
))
3701 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3702 else if (sec
== obj_datasec (output_bfd
))
3703 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3704 else if (sec
== obj_bsssec (output_bfd
))
3705 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3707 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3709 val
= (h
->root
.u
.def
.value
3711 + h
->root
.u
.def
.section
->output_offset
);
3714 case bfd_link_hash_common
:
3715 type
= N_UNDF
| N_EXT
;
3716 val
= h
->root
.u
.c
.size
;
3718 case bfd_link_hash_undefweak
:
3722 case bfd_link_hash_indirect
:
3723 /* We ignore these symbols, since the indirected symbol is
3724 already in the hash table. */
3728 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3729 H_PUT_8 (output_bfd
, 0, outsym
.e_other
);
3730 H_PUT_16 (output_bfd
, 0, outsym
.e_desc
);
3731 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3733 if (indx
== - (bfd_size_type
) 1)
3734 /* FIXME: No way to handle errors. */
3737 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3738 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3740 amt
= EXTERNAL_NLIST_SIZE
;
3741 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3742 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3743 /* FIXME: No way to handle errors. */
3746 flaginfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
3747 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3748 ++obj_aout_external_sym_count (output_bfd
);
3753 /* Handle a link order which is supposed to generate a reloc. */
3756 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3758 struct bfd_link_order
*p
)
3760 struct bfd_link_order_reloc
*pr
;
3763 reloc_howto_type
*howto
;
3764 file_ptr
*reloff_ptr
= NULL
;
3765 struct reloc_std_external srel
;
3766 struct reloc_ext_external erel
;
3772 if (p
->type
== bfd_section_reloc_link_order
)
3775 if (bfd_is_abs_section (pr
->u
.section
))
3776 r_index
= N_ABS
| N_EXT
;
3779 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3780 r_index
= pr
->u
.section
->target_index
;
3785 struct aout_link_hash_entry
*h
;
3787 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3789 h
= ((struct aout_link_hash_entry
*)
3790 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3791 pr
->u
.name
, FALSE
, FALSE
, TRUE
));
3797 /* We decided to strip this symbol, but it turns out that we
3798 can't. Note that we lose the other and desc information
3799 here. I don't think that will ever matter for a global
3803 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3809 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3810 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3815 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3818 bfd_set_error (bfd_error_bad_value
);
3822 if (o
== obj_textsec (flaginfo
->output_bfd
))
3823 reloff_ptr
= &flaginfo
->treloff
;
3824 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3825 reloff_ptr
= &flaginfo
->dreloff
;
3829 if (obj_reloc_entry_size (flaginfo
->output_bfd
) == RELOC_STD_SIZE
)
3832 MY_put_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3842 r_pcrel
= (int) howto
->pc_relative
;
3843 r_baserel
= (howto
->type
& 8) != 0;
3844 r_jmptable
= (howto
->type
& 16) != 0;
3845 r_relative
= (howto
->type
& 32) != 0;
3846 r_length
= howto
->size
;
3848 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3849 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3851 srel
.r_index
[0] = r_index
>> 16;
3852 srel
.r_index
[1] = r_index
>> 8;
3853 srel
.r_index
[2] = r_index
;
3855 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3856 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3857 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3858 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3859 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3860 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3864 srel
.r_index
[2] = r_index
>> 16;
3865 srel
.r_index
[1] = r_index
>> 8;
3866 srel
.r_index
[0] = r_index
;
3868 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3869 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3870 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3871 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3872 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3873 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3877 rel_ptr
= (void *) &srel
;
3879 /* We have to write the addend into the object file, since
3880 standard a.out relocs are in place. It would be more
3881 reliable if we had the current contents of the file here,
3882 rather than assuming zeroes, but we can't read the file since
3883 it was opened using bfd_openw. */
3884 if (pr
->addend
!= 0)
3887 bfd_reloc_status_type r
;
3891 size
= bfd_get_reloc_size (howto
);
3892 buf
= (bfd_byte
*) bfd_zmalloc (size
);
3893 if (buf
== NULL
&& size
!= 0)
3895 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3896 (bfd_vma
) pr
->addend
, buf
);
3902 case bfd_reloc_outofrange
:
3904 case bfd_reloc_overflow
:
3905 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3906 (flaginfo
->info
, NULL
,
3907 (p
->type
== bfd_section_reloc_link_order
3908 ? bfd_section_name (flaginfo
->output_bfd
,
3911 howto
->name
, pr
->addend
, NULL
, NULL
, (bfd_vma
) 0);
3914 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
, (void *) buf
,
3915 (file_ptr
) p
->offset
, size
);
3923 #ifdef MY_put_ext_reloc
3924 MY_put_ext_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
,
3925 howto
, &erel
, pr
->addend
);
3927 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, erel
.r_address
);
3929 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3931 erel
.r_index
[0] = r_index
>> 16;
3932 erel
.r_index
[1] = r_index
>> 8;
3933 erel
.r_index
[2] = r_index
;
3935 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
3936 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
3940 erel
.r_index
[2] = r_index
>> 16;
3941 erel
.r_index
[1] = r_index
>> 8;
3942 erel
.r_index
[0] = r_index
;
3944 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
3945 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
3948 PUT_WORD (flaginfo
->output_bfd
, (bfd_vma
) pr
->addend
, erel
.r_addend
);
3949 #endif /* MY_put_ext_reloc */
3951 rel_ptr
= (void *) &erel
;
3954 amt
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3955 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3956 || bfd_bwrite (rel_ptr
, amt
, flaginfo
->output_bfd
) != amt
)
3959 *reloff_ptr
+= obj_reloc_entry_size (flaginfo
->output_bfd
);
3961 /* Assert that the relocs have not run into the symbols, and that n
3962 the text relocs have not run into the data relocs. */
3963 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3964 && (reloff_ptr
!= &flaginfo
->treloff
3966 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3971 /* Get the section corresponding to a reloc index. */
3973 static INLINE asection
*
3974 aout_reloc_index_to_section (bfd
*abfd
, int indx
)
3976 switch (indx
& N_TYPE
)
3978 case N_TEXT
: return obj_textsec (abfd
);
3979 case N_DATA
: return obj_datasec (abfd
);
3980 case N_BSS
: return obj_bsssec (abfd
);
3982 case N_UNDF
: return bfd_abs_section_ptr
;
3988 /* Relocate an a.out section using standard a.out relocs. */
3991 aout_link_input_section_std (struct aout_final_link_info
*flaginfo
,
3993 asection
*input_section
,
3994 struct reloc_std_external
*relocs
,
3995 bfd_size_type rel_size
,
3998 bfd_boolean (*check_dynamic_reloc
)
3999 (struct bfd_link_info
*, bfd
*, asection
*,
4000 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4003 bfd_boolean relocatable
;
4004 struct external_nlist
*syms
;
4006 struct aout_link_hash_entry
**sym_hashes
;
4008 bfd_size_type reloc_count
;
4009 struct reloc_std_external
*rel
;
4010 struct reloc_std_external
*rel_end
;
4012 output_bfd
= flaginfo
->output_bfd
;
4013 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4015 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
4016 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4017 == output_bfd
->xvec
->header_byteorder
);
4019 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4020 syms
= obj_aout_external_syms (input_bfd
);
4021 strings
= obj_aout_external_strings (input_bfd
);
4022 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4023 symbol_map
= flaginfo
->symbol_map
;
4025 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4027 rel_end
= rel
+ reloc_count
;
4028 for (; rel
< rel_end
; rel
++)
4035 reloc_howto_type
*howto
;
4036 struct aout_link_hash_entry
*h
= NULL
;
4038 bfd_reloc_status_type r
;
4040 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4042 #ifdef MY_reloc_howto
4043 howto
= MY_reloc_howto (input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
4049 unsigned int howto_idx
;
4051 if (bfd_header_big_endian (input_bfd
))
4053 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4054 | ((unsigned int) rel
->r_index
[1] << 8)
4056 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4057 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4058 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4059 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4060 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4061 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4062 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4066 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4067 | ((unsigned int) rel
->r_index
[1] << 8)
4069 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4070 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4071 r_baserel
= (0 != (rel
->r_type
[0]
4072 & RELOC_STD_BITS_BASEREL_LITTLE
));
4073 r_jmptable
= (0 != (rel
->r_type
[0]
4074 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4075 r_relative
= (0 != (rel
->r_type
[0]
4076 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4077 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4078 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4081 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4082 + 16 * r_jmptable
+ 32 * r_relative
);
4083 if (howto_idx
< TABLE_SIZE (howto_table_std
))
4084 howto
= howto_table_std
+ howto_idx
;
4092 (*flaginfo
->info
->callbacks
->einfo
)
4093 (_("%P: %pB: unexpected relocation type\n"), input_bfd
);
4094 bfd_set_error (bfd_error_bad_value
);
4100 /* We are generating a relocatable output file, and must
4101 modify the reloc accordingly. */
4104 /* If we know the symbol this relocation is against,
4105 convert it into a relocation against a section. This
4106 is what the native linker does. */
4107 h
= sym_hashes
[r_index
];
4109 && (h
->root
.type
== bfd_link_hash_defined
4110 || h
->root
.type
== bfd_link_hash_defweak
))
4112 asection
*output_section
;
4114 /* Change the r_extern value. */
4115 if (bfd_header_big_endian (output_bfd
))
4116 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4118 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4120 /* Compute a new r_index. */
4121 output_section
= h
->root
.u
.def
.section
->output_section
;
4122 if (output_section
== obj_textsec (output_bfd
))
4124 else if (output_section
== obj_datasec (output_bfd
))
4126 else if (output_section
== obj_bsssec (output_bfd
))
4131 /* Add the symbol value and the section VMA to the
4132 addend stored in the contents. */
4133 relocation
= (h
->root
.u
.def
.value
4134 + output_section
->vma
4135 + h
->root
.u
.def
.section
->output_offset
);
4139 /* We must change r_index according to the symbol
4141 r_index
= symbol_map
[r_index
];
4147 /* We decided to strip this symbol, but it
4148 turns out that we can't. Note that we
4149 lose the other and desc information here.
4150 I don't think that will ever matter for a
4156 if (!aout_link_write_other_symbol (&h
->root
.root
,
4166 name
= strings
+ GET_WORD (input_bfd
,
4167 syms
[r_index
].e_strx
);
4168 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4169 (flaginfo
->info
, name
,
4170 input_bfd
, input_section
, r_addr
);
4178 /* Write out the new r_index value. */
4179 if (bfd_header_big_endian (output_bfd
))
4181 rel
->r_index
[0] = r_index
>> 16;
4182 rel
->r_index
[1] = r_index
>> 8;
4183 rel
->r_index
[2] = r_index
;
4187 rel
->r_index
[2] = r_index
>> 16;
4188 rel
->r_index
[1] = r_index
>> 8;
4189 rel
->r_index
[0] = r_index
;
4196 /* This is a relocation against a section. We must
4197 adjust by the amount that the section moved. */
4198 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4199 relocation
= (section
->output_section
->vma
4200 + section
->output_offset
4204 /* Change the address of the relocation. */
4205 PUT_WORD (output_bfd
,
4206 r_addr
+ input_section
->output_offset
,
4209 /* Adjust a PC relative relocation by removing the reference
4210 to the original address in the section and including the
4211 reference to the new address. */
4213 relocation
-= (input_section
->output_section
->vma
4214 + input_section
->output_offset
4215 - input_section
->vma
);
4217 #ifdef MY_relocatable_reloc
4218 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4221 if (relocation
== 0)
4224 r
= MY_relocate_contents (howto
,
4225 input_bfd
, relocation
,
4232 /* We are generating an executable, and must do a full
4238 h
= sym_hashes
[r_index
];
4241 && (h
->root
.type
== bfd_link_hash_defined
4242 || h
->root
.type
== bfd_link_hash_defweak
))
4244 relocation
= (h
->root
.u
.def
.value
4245 + h
->root
.u
.def
.section
->output_section
->vma
4246 + h
->root
.u
.def
.section
->output_offset
);
4249 && h
->root
.type
== bfd_link_hash_undefweak
)
4261 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4262 relocation
= (section
->output_section
->vma
4263 + section
->output_offset
4266 relocation
+= input_section
->vma
;
4269 if (check_dynamic_reloc
!= NULL
)
4273 if (! ((*check_dynamic_reloc
)
4274 (flaginfo
->info
, input_bfd
, input_section
, h
,
4275 (void *) rel
, contents
, &skip
, &relocation
)))
4281 /* Now warn if a global symbol is undefined. We could not
4282 do this earlier, because check_dynamic_reloc might want
4283 to skip this reloc. */
4284 if (hundef
&& ! bfd_link_pic (flaginfo
->info
) && ! r_baserel
)
4289 name
= h
->root
.root
.string
;
4291 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4292 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4293 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4296 r
= MY_final_link_relocate (howto
,
4297 input_bfd
, input_section
,
4298 contents
, r_addr
, relocation
,
4302 if (r
!= bfd_reloc_ok
)
4307 case bfd_reloc_outofrange
:
4309 case bfd_reloc_overflow
:
4316 name
= strings
+ GET_WORD (input_bfd
,
4317 syms
[r_index
].e_strx
);
4322 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4323 name
= bfd_section_name (input_bfd
, s
);
4325 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4326 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4327 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
4337 /* Relocate an a.out section using extended a.out relocs. */
4340 aout_link_input_section_ext (struct aout_final_link_info
*flaginfo
,
4342 asection
*input_section
,
4343 struct reloc_ext_external
*relocs
,
4344 bfd_size_type rel_size
,
4347 bfd_boolean (*check_dynamic_reloc
)
4348 (struct bfd_link_info
*, bfd
*, asection
*,
4349 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4352 bfd_boolean relocatable
;
4353 struct external_nlist
*syms
;
4355 struct aout_link_hash_entry
**sym_hashes
;
4357 bfd_size_type reloc_count
;
4358 struct reloc_ext_external
*rel
;
4359 struct reloc_ext_external
*rel_end
;
4361 output_bfd
= flaginfo
->output_bfd
;
4362 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4364 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4365 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4366 == output_bfd
->xvec
->header_byteorder
);
4368 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4369 syms
= obj_aout_external_syms (input_bfd
);
4370 strings
= obj_aout_external_strings (input_bfd
);
4371 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4372 symbol_map
= flaginfo
->symbol_map
;
4374 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4376 rel_end
= rel
+ reloc_count
;
4377 for (; rel
< rel_end
; rel
++)
4382 unsigned int r_type
;
4384 struct aout_link_hash_entry
*h
= NULL
;
4385 asection
*r_section
= NULL
;
4388 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4390 if (bfd_header_big_endian (input_bfd
))
4392 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4393 | ((unsigned int) rel
->r_index
[1] << 8)
4395 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4396 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4397 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4401 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4402 | ((unsigned int) rel
->r_index
[1] << 8)
4404 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4405 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4406 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4409 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4411 if (r_type
>= TABLE_SIZE (howto_table_ext
))
4413 (*flaginfo
->info
->callbacks
->einfo
)
4414 (_("%P: %pB: unexpected relocation type\n"), input_bfd
);
4415 bfd_set_error (bfd_error_bad_value
);
4421 /* We are generating a relocatable output file, and must
4422 modify the reloc accordingly. */
4424 || r_type
== (unsigned int) RELOC_BASE10
4425 || r_type
== (unsigned int) RELOC_BASE13
4426 || r_type
== (unsigned int) RELOC_BASE22
)
4428 /* If we know the symbol this relocation is against,
4429 convert it into a relocation against a section. This
4430 is what the native linker does. */
4431 if (r_type
== (unsigned int) RELOC_BASE10
4432 || r_type
== (unsigned int) RELOC_BASE13
4433 || r_type
== (unsigned int) RELOC_BASE22
)
4436 h
= sym_hashes
[r_index
];
4438 && (h
->root
.type
== bfd_link_hash_defined
4439 || h
->root
.type
== bfd_link_hash_defweak
))
4441 asection
*output_section
;
4443 /* Change the r_extern value. */
4444 if (bfd_header_big_endian (output_bfd
))
4445 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4447 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4449 /* Compute a new r_index. */
4450 output_section
= h
->root
.u
.def
.section
->output_section
;
4451 if (output_section
== obj_textsec (output_bfd
))
4453 else if (output_section
== obj_datasec (output_bfd
))
4455 else if (output_section
== obj_bsssec (output_bfd
))
4460 /* Add the symbol value and the section VMA to the
4462 relocation
= (h
->root
.u
.def
.value
4463 + output_section
->vma
4464 + h
->root
.u
.def
.section
->output_offset
);
4466 /* Now RELOCATION is the VMA of the final
4467 destination. If this is a PC relative reloc,
4468 then ADDEND is the negative of the source VMA.
4469 We want to set ADDEND to the difference between
4470 the destination VMA and the source VMA, which
4471 means we must adjust RELOCATION by the change in
4472 the source VMA. This is done below. */
4476 /* We must change r_index according to the symbol
4478 r_index
= symbol_map
[r_index
];
4484 /* We decided to strip this symbol, but it
4485 turns out that we can't. Note that we
4486 lose the other and desc information here.
4487 I don't think that will ever matter for a
4493 if (!aout_link_write_other_symbol (&h
->root
.root
,
4503 name
= strings
+ GET_WORD (input_bfd
,
4504 syms
[r_index
].e_strx
);
4505 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4506 (flaginfo
->info
, name
,
4507 input_bfd
, input_section
, r_addr
);
4514 /* If this is a PC relative reloc, then the addend
4515 is the negative of the source VMA. We must
4516 adjust it by the change in the source VMA. This
4520 /* Write out the new r_index value. */
4521 if (bfd_header_big_endian (output_bfd
))
4523 rel
->r_index
[0] = r_index
>> 16;
4524 rel
->r_index
[1] = r_index
>> 8;
4525 rel
->r_index
[2] = r_index
;
4529 rel
->r_index
[2] = r_index
>> 16;
4530 rel
->r_index
[1] = r_index
>> 8;
4531 rel
->r_index
[0] = r_index
;
4536 /* This is a relocation against a section. We must
4537 adjust by the amount that the section moved. */
4538 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4539 relocation
= (r_section
->output_section
->vma
4540 + r_section
->output_offset
4543 /* If this is a PC relative reloc, then the addend is
4544 the difference in VMA between the destination and the
4545 source. We have just adjusted for the change in VMA
4546 of the destination, so we must also adjust by the
4547 change in VMA of the source. This is done below. */
4550 /* As described above, we must always adjust a PC relative
4551 reloc by the change in VMA of the source. However, if
4552 pcrel_offset is set, then the addend does not include the
4553 location within the section, in which case we don't need
4554 to adjust anything. */
4555 if (howto_table_ext
[r_type
].pc_relative
4556 && ! howto_table_ext
[r_type
].pcrel_offset
)
4557 relocation
-= (input_section
->output_section
->vma
4558 + input_section
->output_offset
4559 - input_section
->vma
);
4561 /* Change the addend if necessary. */
4562 if (relocation
!= 0)
4563 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4565 /* Change the address of the relocation. */
4566 PUT_WORD (output_bfd
,
4567 r_addr
+ input_section
->output_offset
,
4573 bfd_reloc_status_type r
;
4575 /* We are generating an executable, and must do a full
4581 h
= sym_hashes
[r_index
];
4584 && (h
->root
.type
== bfd_link_hash_defined
4585 || h
->root
.type
== bfd_link_hash_defweak
))
4587 relocation
= (h
->root
.u
.def
.value
4588 + h
->root
.u
.def
.section
->output_section
->vma
4589 + h
->root
.u
.def
.section
->output_offset
);
4592 && h
->root
.type
== bfd_link_hash_undefweak
)
4600 else if (r_type
== (unsigned int) RELOC_BASE10
4601 || r_type
== (unsigned int) RELOC_BASE13
4602 || r_type
== (unsigned int) RELOC_BASE22
)
4604 struct external_nlist
*sym
;
4607 /* For base relative relocs, r_index is always an index
4608 into the symbol table, even if r_extern is 0. */
4609 sym
= syms
+ r_index
;
4610 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4611 if ((type
& N_TYPE
) == N_TEXT
4613 r_section
= obj_textsec (input_bfd
);
4614 else if ((type
& N_TYPE
) == N_DATA
4616 r_section
= obj_datasec (input_bfd
);
4617 else if ((type
& N_TYPE
) == N_BSS
4619 r_section
= obj_bsssec (input_bfd
);
4620 else if ((type
& N_TYPE
) == N_ABS
4622 r_section
= bfd_abs_section_ptr
;
4625 relocation
= (r_section
->output_section
->vma
4626 + r_section
->output_offset
4627 + (GET_WORD (input_bfd
, sym
->e_value
)
4632 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4634 /* If this is a PC relative reloc, then R_ADDEND is the
4635 difference between the two vmas, or
4636 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4638 old_dest_sec == section->vma
4640 old_src_sec == input_section->vma
4642 old_src_off == r_addr
4644 _bfd_final_link_relocate expects RELOCATION +
4645 R_ADDEND to be the VMA of the destination minus
4646 r_addr (the minus r_addr is because this relocation
4647 is not pcrel_offset, which is a bit confusing and
4648 should, perhaps, be changed), or
4651 new_dest_sec == output_section->vma + output_offset
4652 We arrange for this to happen by setting RELOCATION to
4653 new_dest_sec + old_src_sec - old_dest_sec
4655 If this is not a PC relative reloc, then R_ADDEND is
4656 simply the VMA of the destination, so we set
4657 RELOCATION to the change in the destination VMA, or
4658 new_dest_sec - old_dest_sec
4660 relocation
= (r_section
->output_section
->vma
4661 + r_section
->output_offset
4663 if (howto_table_ext
[r_type
].pc_relative
)
4664 relocation
+= input_section
->vma
;
4667 if (check_dynamic_reloc
!= NULL
)
4671 if (! ((*check_dynamic_reloc
)
4672 (flaginfo
->info
, input_bfd
, input_section
, h
,
4673 (void *) rel
, contents
, &skip
, &relocation
)))
4679 /* Now warn if a global symbol is undefined. We could not
4680 do this earlier, because check_dynamic_reloc might want
4681 to skip this reloc. */
4683 && ! bfd_link_pic (flaginfo
->info
)
4684 && r_type
!= (unsigned int) RELOC_BASE10
4685 && r_type
!= (unsigned int) RELOC_BASE13
4686 && r_type
!= (unsigned int) RELOC_BASE22
)
4691 name
= h
->root
.root
.string
;
4693 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4694 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4695 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4698 if (r_type
!= (unsigned int) RELOC_SPARC_REV32
)
4699 r
= MY_final_link_relocate (howto_table_ext
+ r_type
,
4700 input_bfd
, input_section
,
4701 contents
, r_addr
, relocation
,
4707 x
= bfd_get_32 (input_bfd
, contents
+ r_addr
);
4708 x
= x
+ relocation
+ r_addend
;
4709 bfd_putl32 (/*input_bfd,*/ x
, contents
+ r_addr
);
4713 if (r
!= bfd_reloc_ok
)
4718 case bfd_reloc_outofrange
:
4720 case bfd_reloc_overflow
:
4727 || r_type
== (unsigned int) RELOC_BASE10
4728 || r_type
== (unsigned int) RELOC_BASE13
4729 || r_type
== (unsigned int) RELOC_BASE22
)
4730 name
= strings
+ GET_WORD (input_bfd
,
4731 syms
[r_index
].e_strx
);
4736 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4737 name
= bfd_section_name (input_bfd
, s
);
4739 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4740 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
,
4741 howto_table_ext
[r_type
].name
,
4742 r_addend
, input_bfd
, input_section
, r_addr
);
4753 /* Link an a.out section into the output file. */
4756 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
4758 asection
*input_section
,
4759 file_ptr
*reloff_ptr
,
4760 bfd_size_type rel_size
)
4762 bfd_size_type input_size
;
4765 /* Get the section contents. */
4766 input_size
= input_section
->size
;
4767 if (! bfd_get_section_contents (input_bfd
, input_section
,
4768 (void *) flaginfo
->contents
,
4769 (file_ptr
) 0, input_size
))
4772 /* Read in the relocs if we haven't already done it. */
4773 if (aout_section_data (input_section
) != NULL
4774 && aout_section_data (input_section
)->relocs
!= NULL
)
4775 relocs
= aout_section_data (input_section
)->relocs
;
4778 relocs
= flaginfo
->relocs
;
4781 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4782 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
4787 /* Relocate the section contents. */
4788 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4790 if (! aout_link_input_section_std (flaginfo
, input_bfd
, input_section
,
4791 (struct reloc_std_external
*) relocs
,
4792 rel_size
, flaginfo
->contents
))
4797 if (! aout_link_input_section_ext (flaginfo
, input_bfd
, input_section
,
4798 (struct reloc_ext_external
*) relocs
,
4799 rel_size
, flaginfo
->contents
))
4803 /* Write out the section contents. */
4804 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
4805 input_section
->output_section
,
4806 (void *) flaginfo
->contents
,
4807 (file_ptr
) input_section
->output_offset
,
4811 /* If we are producing relocatable output, the relocs were
4812 modified, and we now write them out. */
4813 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
4815 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4817 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
4819 *reloff_ptr
+= rel_size
;
4821 /* Assert that the relocs have not run into the symbols, and
4822 that if these are the text relocs they have not run into the
4824 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
4825 && (reloff_ptr
!= &flaginfo
->treloff
4827 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
4833 /* Adjust and write out the symbols for an a.out file. Set the new
4834 symbol indices into a symbol_map. */
4837 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4840 bfd_size_type sym_count
;
4842 enum bfd_link_strip strip
;
4843 enum bfd_link_discard discard
;
4844 struct external_nlist
*outsym
;
4845 bfd_size_type strtab_index
;
4846 struct external_nlist
*sym
;
4847 struct external_nlist
*sym_end
;
4848 struct aout_link_hash_entry
**sym_hash
;
4851 bfd_boolean skip_next
;
4853 output_bfd
= flaginfo
->output_bfd
;
4854 sym_count
= obj_aout_external_sym_count (input_bfd
);
4855 strings
= obj_aout_external_strings (input_bfd
);
4856 strip
= flaginfo
->info
->strip
;
4857 discard
= flaginfo
->info
->discard
;
4858 outsym
= flaginfo
->output_syms
;
4860 /* First write out a symbol for this object file, unless we are
4861 discarding such symbols. */
4862 if (strip
!= strip_all
4863 && (strip
!= strip_some
4864 || bfd_hash_lookup (flaginfo
->info
->keep_hash
, input_bfd
->filename
,
4865 FALSE
, FALSE
) != NULL
)
4866 && discard
!= discard_all
)
4868 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4869 H_PUT_8 (output_bfd
, 0, outsym
->e_other
);
4870 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4871 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4872 input_bfd
->filename
, FALSE
);
4873 if (strtab_index
== (bfd_size_type
) -1)
4875 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4876 PUT_WORD (output_bfd
,
4877 (bfd_get_section_vma (output_bfd
,
4878 obj_textsec (input_bfd
)->output_section
)
4879 + obj_textsec (input_bfd
)->output_offset
),
4881 ++obj_aout_external_sym_count (output_bfd
);
4887 sym
= obj_aout_external_syms (input_bfd
);
4888 sym_end
= sym
+ sym_count
;
4889 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4890 symbol_map
= flaginfo
->symbol_map
;
4891 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4892 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4896 struct aout_link_hash_entry
*h
;
4902 /* We set *symbol_map to 0 above for all symbols. If it has
4903 already been set to -1 for this symbol, it means that we are
4904 discarding it because it appears in a duplicate header file.
4905 See the N_BINCL code below. */
4906 if (*symbol_map
== -1)
4909 /* Initialize *symbol_map to -1, which means that the symbol was
4910 not copied into the output file. We will change it later if
4911 we do copy the symbol over. */
4914 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4915 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4921 /* Pass this symbol through. It is the target of an
4922 indirect or warning symbol. */
4923 val
= GET_WORD (input_bfd
, sym
->e_value
);
4928 /* Skip this symbol, which is the target of an indirect
4929 symbol that we have changed to no longer be an indirect
4936 struct aout_link_hash_entry
*hresolve
;
4938 /* We have saved the hash table entry for this symbol, if
4939 there is one. Note that we could just look it up again
4940 in the hash table, provided we first check that it is an
4944 /* Use the name from the hash table, in case the symbol was
4947 && h
->root
.type
!= bfd_link_hash_warning
)
4948 name
= h
->root
.root
.string
;
4950 /* If this is an indirect or warning symbol, then change
4951 hresolve to the base symbol. We also change *sym_hash so
4952 that the relocation routines relocate against the real
4955 if (h
!= (struct aout_link_hash_entry
*) NULL
4956 && (h
->root
.type
== bfd_link_hash_indirect
4957 || h
->root
.type
== bfd_link_hash_warning
))
4959 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4960 while (hresolve
->root
.type
== bfd_link_hash_indirect
4961 || hresolve
->root
.type
== bfd_link_hash_warning
)
4962 hresolve
= ((struct aout_link_hash_entry
*)
4963 hresolve
->root
.u
.i
.link
);
4964 *sym_hash
= hresolve
;
4967 /* If the symbol has already been written out, skip it. */
4971 if ((type
& N_TYPE
) == N_INDR
4972 || type
== N_WARNING
)
4974 *symbol_map
= h
->indx
;
4978 /* See if we are stripping this symbol. */
4984 case strip_debugger
:
4985 if ((type
& N_STAB
) != 0)
4989 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
5004 /* Get the value of the symbol. */
5005 if ((type
& N_TYPE
) == N_TEXT
5007 symsec
= obj_textsec (input_bfd
);
5008 else if ((type
& N_TYPE
) == N_DATA
5010 symsec
= obj_datasec (input_bfd
);
5011 else if ((type
& N_TYPE
) == N_BSS
5013 symsec
= obj_bsssec (input_bfd
);
5014 else if ((type
& N_TYPE
) == N_ABS
5016 symsec
= bfd_abs_section_ptr
;
5017 else if (((type
& N_TYPE
) == N_INDR
5018 && (hresolve
== NULL
5019 || (hresolve
->root
.type
!= bfd_link_hash_defined
5020 && hresolve
->root
.type
!= bfd_link_hash_defweak
5021 && hresolve
->root
.type
!= bfd_link_hash_common
)))
5022 || type
== N_WARNING
)
5024 /* Pass the next symbol through unchanged. The
5025 condition above for indirect symbols is so that if
5026 the indirect symbol was defined, we output it with
5027 the correct definition so the debugger will
5030 val
= GET_WORD (input_bfd
, sym
->e_value
);
5033 else if ((type
& N_STAB
) != 0)
5035 val
= GET_WORD (input_bfd
, sym
->e_value
);
5040 /* If we get here with an indirect symbol, it means that
5041 we are outputting it with a real definition. In such
5042 a case we do not want to output the next symbol,
5043 which is the target of the indirection. */
5044 if ((type
& N_TYPE
) == N_INDR
)
5049 /* We need to get the value from the hash table. We use
5050 hresolve so that if we have defined an indirect
5051 symbol we output the final definition. */
5054 switch (type
& N_TYPE
)
5057 symsec
= obj_textsec (input_bfd
);
5060 symsec
= obj_datasec (input_bfd
);
5063 symsec
= obj_bsssec (input_bfd
);
5066 symsec
= bfd_abs_section_ptr
;
5073 else if (hresolve
->root
.type
== bfd_link_hash_defined
5074 || hresolve
->root
.type
== bfd_link_hash_defweak
)
5076 asection
*input_section
;
5077 asection
*output_section
;
5079 /* This case usually means a common symbol which was
5080 turned into a defined symbol. */
5081 input_section
= hresolve
->root
.u
.def
.section
;
5082 output_section
= input_section
->output_section
;
5083 BFD_ASSERT (bfd_is_abs_section (output_section
)
5084 || output_section
->owner
== output_bfd
);
5085 val
= (hresolve
->root
.u
.def
.value
5086 + bfd_get_section_vma (output_bfd
, output_section
)
5087 + input_section
->output_offset
);
5089 /* Get the correct type based on the section. If
5090 this is a constructed set, force it to be
5091 globally visible. */
5100 if (output_section
== obj_textsec (output_bfd
))
5101 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5104 else if (output_section
== obj_datasec (output_bfd
))
5105 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5108 else if (output_section
== obj_bsssec (output_bfd
))
5109 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5113 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5117 else if (hresolve
->root
.type
== bfd_link_hash_common
)
5118 val
= hresolve
->root
.u
.c
.size
;
5119 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
5128 val
= (symsec
->output_section
->vma
5129 + symsec
->output_offset
5130 + (GET_WORD (input_bfd
, sym
->e_value
)
5133 /* If this is a global symbol set the written flag, and if
5134 it is a local symbol see if we should discard it. */
5138 h
->indx
= obj_aout_external_sym_count (output_bfd
);
5140 else if ((type
& N_TYPE
) != N_SETT
5141 && (type
& N_TYPE
) != N_SETD
5142 && (type
& N_TYPE
) != N_SETB
5143 && (type
& N_TYPE
) != N_SETA
)
5148 case discard_sec_merge
:
5151 if ((type
& N_STAB
) == 0
5152 && bfd_is_local_label_name (input_bfd
, name
))
5166 /* An N_BINCL symbol indicates the start of the stabs
5167 entries for a header file. We need to scan ahead to the
5168 next N_EINCL symbol, ignoring nesting, adding up all the
5169 characters in the symbol names, not including the file
5170 numbers in types (the first number after an open
5172 if (type
== (int) N_BINCL
)
5174 struct external_nlist
*incl_sym
;
5176 struct aout_link_includes_entry
*incl_entry
;
5177 struct aout_link_includes_totals
*t
;
5181 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
5185 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5186 if (incl_type
== (int) N_EINCL
)
5192 else if (incl_type
== (int) N_BINCL
)
5198 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
5199 for (; *s
!= '\0'; s
++)
5204 /* Skip the file number. */
5206 while (ISDIGIT (*s
))
5214 /* If we have already included a header file with the
5215 same value, then replace this one with an N_EXCL
5217 copy
= (bfd_boolean
) (! flaginfo
->info
->keep_memory
);
5218 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
5220 if (incl_entry
== NULL
)
5222 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
5223 if (t
->total
== val
)
5227 /* This is the first time we have seen this header
5228 file with this set of stabs strings. */
5229 t
= (struct aout_link_includes_totals
*)
5230 bfd_hash_allocate (&flaginfo
->includes
.root
,
5235 t
->next
= incl_entry
->totals
;
5236 incl_entry
->totals
= t
;
5242 /* This is a duplicate header file. We must change
5243 it to be an N_EXCL entry, and mark all the
5244 included symbols to prevent outputting them. */
5245 type
= (int) N_EXCL
;
5248 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
5250 incl_sym
++, incl_map
++)
5254 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5255 if (incl_type
== (int) N_EINCL
)
5264 else if (incl_type
== (int) N_BINCL
)
5273 /* Copy this symbol into the list of symbols we are going to
5275 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
5276 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_other
), outsym
->e_other
);
5277 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
5279 if (! flaginfo
->info
->keep_memory
)
5281 /* name points into a string table which we are going to
5282 free. If there is a hash table entry, use that string.
5283 Otherwise, copy name into memory. */
5285 name
= h
->root
.root
.string
;
5289 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
5291 if (strtab_index
== (bfd_size_type
) -1)
5293 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
5294 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
5295 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
5296 ++obj_aout_external_sym_count (output_bfd
);
5300 /* Write out the output symbols we have just constructed. */
5301 if (outsym
> flaginfo
->output_syms
)
5303 bfd_size_type outsym_size
;
5305 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
5307 outsym_size
= outsym
- flaginfo
->output_syms
;
5308 outsym_size
*= EXTERNAL_NLIST_SIZE
;
5309 if (bfd_bwrite ((void *) flaginfo
->output_syms
, outsym_size
, output_bfd
)
5312 flaginfo
->symoff
+= outsym_size
;
5318 /* Link an a.out input BFD into the output file. */
5321 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
5323 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
5325 /* If this is a dynamic object, it may need special handling. */
5326 if ((input_bfd
->flags
& DYNAMIC
) != 0
5327 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
5328 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
5329 (flaginfo
->info
, input_bfd
));
5331 /* Get the symbols. We probably have them already, unless
5332 flaginfo->info->keep_memory is FALSE. */
5333 if (! aout_get_external_symbols (input_bfd
))
5336 /* Write out the symbols and get a map of the new indices. The map
5337 is placed into flaginfo->symbol_map. */
5338 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
5341 /* Relocate and write out the sections. These functions use the
5342 symbol map created by aout_link_write_symbols. The linker_mark
5343 field will be set if these sections are to be included in the
5344 link, which will normally be the case. */
5345 if (obj_textsec (input_bfd
)->linker_mark
)
5347 if (! aout_link_input_section (flaginfo
, input_bfd
,
5348 obj_textsec (input_bfd
),
5350 exec_hdr (input_bfd
)->a_trsize
))
5353 if (obj_datasec (input_bfd
)->linker_mark
)
5355 if (! aout_link_input_section (flaginfo
, input_bfd
,
5356 obj_datasec (input_bfd
),
5358 exec_hdr (input_bfd
)->a_drsize
))
5362 /* If we are not keeping memory, we don't need the symbols any
5363 longer. We still need them if we are keeping memory, because the
5364 strings in the hash table point into them. */
5365 if (! flaginfo
->info
->keep_memory
)
5367 if (! aout_link_free_symbols (input_bfd
))
5374 /* Do the final link step. This is called on the output BFD. The
5375 INFO structure should point to a list of BFDs linked through the
5376 link.next field which can be used to find each BFD which takes part
5377 in the output. Also, each section in ABFD should point to a list
5378 of bfd_link_order structures which list all the input sections for
5379 the output section. */
5382 NAME (aout
, final_link
) (bfd
*abfd
,
5383 struct bfd_link_info
*info
,
5384 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
5386 struct aout_final_link_info aout_info
;
5387 bfd_boolean includes_hash_initialized
= FALSE
;
5389 bfd_size_type trsize
, drsize
;
5390 bfd_size_type max_contents_size
;
5391 bfd_size_type max_relocs_size
;
5392 bfd_size_type max_sym_count
;
5393 struct bfd_link_order
*p
;
5395 bfd_boolean have_link_order_relocs
;
5397 if (bfd_link_pic (info
))
5398 abfd
->flags
|= DYNAMIC
;
5400 aout_info
.info
= info
;
5401 aout_info
.output_bfd
= abfd
;
5402 aout_info
.contents
= NULL
;
5403 aout_info
.relocs
= NULL
;
5404 aout_info
.symbol_map
= NULL
;
5405 aout_info
.output_syms
= NULL
;
5407 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
5408 aout_link_includes_newfunc
,
5409 sizeof (struct aout_link_includes_entry
),
5412 includes_hash_initialized
= TRUE
;
5414 /* Figure out the largest section size. Also, if generating
5415 relocatable output, count the relocs. */
5418 max_contents_size
= 0;
5419 max_relocs_size
= 0;
5421 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5425 if (bfd_link_relocatable (info
))
5427 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5429 trsize
+= exec_hdr (sub
)->a_trsize
;
5430 drsize
+= exec_hdr (sub
)->a_drsize
;
5434 /* FIXME: We need to identify the .text and .data sections
5435 and call get_reloc_upper_bound and canonicalize_reloc to
5436 work out the number of relocs needed, and then multiply
5437 by the reloc size. */
5439 /* xgettext:c-format */
5440 (_("%pB: relocatable link from %s to %s not supported"),
5441 abfd
, sub
->xvec
->name
, abfd
->xvec
->name
);
5442 bfd_set_error (bfd_error_invalid_operation
);
5447 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5449 sz
= obj_textsec (sub
)->size
;
5450 if (sz
> max_contents_size
)
5451 max_contents_size
= sz
;
5452 sz
= obj_datasec (sub
)->size
;
5453 if (sz
> max_contents_size
)
5454 max_contents_size
= sz
;
5456 sz
= exec_hdr (sub
)->a_trsize
;
5457 if (sz
> max_relocs_size
)
5458 max_relocs_size
= sz
;
5459 sz
= exec_hdr (sub
)->a_drsize
;
5460 if (sz
> max_relocs_size
)
5461 max_relocs_size
= sz
;
5463 sz
= obj_aout_external_sym_count (sub
);
5464 if (sz
> max_sym_count
)
5469 if (bfd_link_relocatable (info
))
5471 if (obj_textsec (abfd
) != NULL
)
5472 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
5473 ->map_head
.link_order
)
5474 * obj_reloc_entry_size (abfd
));
5475 if (obj_datasec (abfd
) != NULL
)
5476 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
5477 ->map_head
.link_order
)
5478 * obj_reloc_entry_size (abfd
));
5481 exec_hdr (abfd
)->a_trsize
= trsize
;
5482 exec_hdr (abfd
)->a_drsize
= drsize
;
5484 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
5486 /* Adjust the section sizes and vmas according to the magic number.
5487 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5488 filepos for each section. */
5489 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
5492 /* The relocation and symbol file positions differ among a.out
5493 targets. We are passed a callback routine from the backend
5494 specific code to handle this.
5495 FIXME: At this point we do not know how much space the symbol
5496 table will require. This will not work for any (nonstandard)
5497 a.out target that needs to know the symbol table size before it
5498 can compute the relocation file positions. This may or may not
5499 be the case for the hp300hpux target, for example. */
5500 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
5502 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
5503 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
5504 obj_sym_filepos (abfd
) = aout_info
.symoff
;
5506 /* We keep a count of the symbols as we output them. */
5507 obj_aout_external_sym_count (abfd
) = 0;
5509 /* We accumulate the string table as we write out the symbols. */
5510 aout_info
.strtab
= _bfd_stringtab_init ();
5511 if (aout_info
.strtab
== NULL
)
5514 /* Allocate buffers to hold section contents and relocs. */
5515 aout_info
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5516 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
5517 aout_info
.symbol_map
= (int *) bfd_malloc (max_sym_count
* sizeof (int));
5518 aout_info
.output_syms
= (struct external_nlist
*)
5519 bfd_malloc ((max_sym_count
+ 1) * sizeof (struct external_nlist
));
5520 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
5521 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
5522 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
5523 || aout_info
.output_syms
== NULL
)
5526 /* If we have a symbol named __DYNAMIC, force it out now. This is
5527 required by SunOS. Doing this here rather than in sunos.c is a
5528 hack, but it's easier than exporting everything which would be
5531 struct aout_link_hash_entry
*h
;
5533 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
5534 FALSE
, FALSE
, FALSE
);
5536 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
5539 /* The most time efficient way to do the link would be to read all
5540 the input object files into memory and then sort out the
5541 information into the output file. Unfortunately, that will
5542 probably use too much memory. Another method would be to step
5543 through everything that composes the text section and write it
5544 out, and then everything that composes the data section and write
5545 it out, and then write out the relocs, and then write out the
5546 symbols. Unfortunately, that requires reading stuff from each
5547 input file several times, and we will not be able to keep all the
5548 input files open simultaneously, and reopening them will be slow.
5550 What we do is basically process one input file at a time. We do
5551 everything we need to do with an input file once--copy over the
5552 section contents, handle the relocation information, and write
5553 out the symbols--and then we throw away the information we read
5554 from it. This approach requires a lot of lseeks of the output
5555 file, which is unfortunate but still faster than reopening a lot
5558 We use the output_has_begun field of the input BFDs to see
5559 whether we have already handled it. */
5560 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5561 sub
->output_has_begun
= FALSE
;
5563 /* Mark all sections which are to be included in the link. This
5564 will normally be every section. We need to do this so that we
5565 can identify any sections which the linker has decided to not
5567 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5569 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5570 if (p
->type
== bfd_indirect_link_order
)
5571 p
->u
.indirect
.section
->linker_mark
= TRUE
;
5574 have_link_order_relocs
= FALSE
;
5575 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5577 for (p
= o
->map_head
.link_order
;
5581 if (p
->type
== bfd_indirect_link_order
5582 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
5583 == bfd_target_aout_flavour
))
5587 input_bfd
= p
->u
.indirect
.section
->owner
;
5588 if (! input_bfd
->output_has_begun
)
5590 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
5592 input_bfd
->output_has_begun
= TRUE
;
5595 else if (p
->type
== bfd_section_reloc_link_order
5596 || p
->type
== bfd_symbol_reloc_link_order
)
5598 /* These are handled below. */
5599 have_link_order_relocs
= TRUE
;
5603 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5609 /* Write out any symbols that we have not already written out. */
5610 bfd_hash_traverse (&info
->hash
->table
,
5611 aout_link_write_other_symbol
,
5614 /* Now handle any relocs we were asked to create by the linker.
5615 These did not come from any input file. We must do these after
5616 we have written out all the symbols, so that we know the symbol
5618 if (have_link_order_relocs
)
5620 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5622 for (p
= o
->map_head
.link_order
;
5626 if (p
->type
== bfd_section_reloc_link_order
5627 || p
->type
== bfd_symbol_reloc_link_order
)
5629 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
5636 if (aout_info
.contents
!= NULL
)
5638 free (aout_info
.contents
);
5639 aout_info
.contents
= NULL
;
5641 if (aout_info
.relocs
!= NULL
)
5643 free (aout_info
.relocs
);
5644 aout_info
.relocs
= NULL
;
5646 if (aout_info
.symbol_map
!= NULL
)
5648 free (aout_info
.symbol_map
);
5649 aout_info
.symbol_map
= NULL
;
5651 if (aout_info
.output_syms
!= NULL
)
5653 free (aout_info
.output_syms
);
5654 aout_info
.output_syms
= NULL
;
5656 if (includes_hash_initialized
)
5658 bfd_hash_table_free (&aout_info
.includes
.root
);
5659 includes_hash_initialized
= FALSE
;
5662 /* Finish up any dynamic linking we may be doing. */
5663 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
5665 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
5669 /* Update the header information. */
5670 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
5671 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
5672 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
5673 obj_textsec (abfd
)->reloc_count
=
5674 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
5675 obj_datasec (abfd
)->reloc_count
=
5676 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
5678 /* Write out the string table, unless there are no symbols. */
5679 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
5681 if (abfd
->symcount
> 0)
5683 if (!emit_stringtab (abfd
, aout_info
.strtab
))
5688 bfd_byte b
[BYTES_IN_WORD
];
5690 memset (b
, 0, BYTES_IN_WORD
);
5691 if (bfd_bwrite (b
, (bfd_size_type
) BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
5698 if (aout_info
.contents
!= NULL
)
5699 free (aout_info
.contents
);
5700 if (aout_info
.relocs
!= NULL
)
5701 free (aout_info
.relocs
);
5702 if (aout_info
.symbol_map
!= NULL
)
5703 free (aout_info
.symbol_map
);
5704 if (aout_info
.output_syms
!= NULL
)
5705 free (aout_info
.output_syms
);
5706 if (includes_hash_initialized
)
5707 bfd_hash_table_free (&aout_info
.includes
.root
);