1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2016 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sparc_aout_sunos_be_vec
72 requires all the names from @file{aout32.c}, and produces the jump vector
74 | sparc_aout_sunos_be_vec
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
86 When porting it to run on a new system, you must supply:
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected. */
110 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
111 Doesn't matter what the setting of WP_TEXT is on output, but it'll
113 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
114 * Any BFD with both flags clear is OMAGIC.
115 (Just want to make these explicit, so the conditions tested in this
116 file make sense if you're more familiar with a.out than with BFD.) */
118 #define KEEPIT udata.i
122 #include "safe-ctype.h"
127 #include "aout/aout64.h"
128 #include "aout/stab_gnu.h"
136 The file @file{aoutx.h} provides for both the @emph{standard}
137 and @emph{extended} forms of a.out relocation records.
139 The standard records contain only an
140 address, a symbol index, and a type field. The extended records
141 (used on 29ks and sparcs) also have a full integer for an
144 #ifndef CTOR_TABLE_RELOC_HOWTO
145 #define CTOR_TABLE_RELOC_IDX 2
146 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
147 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
148 ? howto_table_ext : howto_table_std) \
149 + CTOR_TABLE_RELOC_IDX)
152 #ifndef MY_swap_std_reloc_in
153 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
156 #ifndef MY_swap_ext_reloc_in
157 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
160 #ifndef MY_swap_std_reloc_out
161 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
164 #ifndef MY_swap_ext_reloc_out
165 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
168 #ifndef MY_final_link_relocate
169 #define MY_final_link_relocate _bfd_final_link_relocate
172 #ifndef MY_relocate_contents
173 #define MY_relocate_contents _bfd_relocate_contents
176 #define howto_table_ext NAME (aout, ext_howto_table)
177 #define howto_table_std NAME (aout, std_howto_table)
179 reloc_howto_type howto_table_ext
[] =
181 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
182 HOWTO (RELOC_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
, 0, "8", FALSE
, 0, 0x000000ff, FALSE
),
183 HOWTO (RELOC_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
, 0, "16", FALSE
, 0, 0x0000ffff, FALSE
),
184 HOWTO (RELOC_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "32", FALSE
, 0, 0xffffffff, FALSE
),
185 HOWTO (RELOC_DISP8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0, "DISP8", FALSE
, 0, 0x000000ff, FALSE
),
186 HOWTO (RELOC_DISP16
, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0, "DISP16", FALSE
, 0, 0x0000ffff, FALSE
),
187 HOWTO (RELOC_DISP32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0, "DISP32", FALSE
, 0, 0xffffffff, FALSE
),
188 HOWTO (RELOC_WDISP30
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "WDISP30", FALSE
, 0, 0x3fffffff, FALSE
),
189 HOWTO (RELOC_WDISP22
, 2, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "WDISP22", FALSE
, 0, 0x003fffff, FALSE
),
190 HOWTO (RELOC_HI22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "HI22", FALSE
, 0, 0x003fffff, FALSE
),
191 HOWTO (RELOC_22
, 0, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "22", FALSE
, 0, 0x003fffff, FALSE
),
192 HOWTO (RELOC_13
, 0, 2, 13, FALSE
, 0, complain_overflow_bitfield
, 0, "13", FALSE
, 0, 0x00001fff, FALSE
),
193 HOWTO (RELOC_LO10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "LO10", FALSE
, 0, 0x000003ff, FALSE
),
194 HOWTO (RELOC_SFA_BASE
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_BASE", FALSE
, 0, 0xffffffff, FALSE
),
195 HOWTO (RELOC_SFA_OFF13
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_OFF13", FALSE
, 0, 0xffffffff, FALSE
),
196 HOWTO (RELOC_BASE10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "BASE10", FALSE
, 0, 0x000003ff, FALSE
),
197 HOWTO (RELOC_BASE13
, 0, 2, 13, FALSE
, 0, complain_overflow_signed
, 0, "BASE13", FALSE
, 0, 0x00001fff, FALSE
),
198 HOWTO (RELOC_BASE22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "BASE22", FALSE
, 0, 0x003fffff, FALSE
),
199 HOWTO (RELOC_PC10
, 0, 2, 10, TRUE
, 0, complain_overflow_dont
, 0, "PC10", FALSE
, 0, 0x000003ff, TRUE
),
200 HOWTO (RELOC_PC22
, 10, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "PC22", FALSE
, 0, 0x003fffff, TRUE
),
201 HOWTO (RELOC_JMP_TBL
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "JMP_TBL", FALSE
, 0, 0x3fffffff, FALSE
),
202 HOWTO (RELOC_SEGOFF16
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "SEGOFF16", FALSE
, 0, 0x00000000, FALSE
),
203 HOWTO (RELOC_GLOB_DAT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "GLOB_DAT", FALSE
, 0, 0x00000000, FALSE
),
204 HOWTO (RELOC_JMP_SLOT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "JMP_SLOT", FALSE
, 0, 0x00000000, FALSE
),
205 HOWTO (RELOC_RELATIVE
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "RELATIVE", FALSE
, 0, 0x00000000, FALSE
),
206 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
207 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
208 #define RELOC_SPARC_REV32 RELOC_WDISP19
209 HOWTO (RELOC_SPARC_REV32
, 0, 2, 32, FALSE
, 0, complain_overflow_dont
, 0,"R_SPARC_REV32",FALSE
, 0, 0xffffffff, FALSE
),
212 /* Convert standard reloc records to "arelent" format (incl byte swap). */
214 reloc_howto_type howto_table_std
[] =
216 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
217 HOWTO ( 0, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,0,"8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
218 HOWTO ( 1, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
219 HOWTO ( 2, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
220 HOWTO ( 3, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,0,"64", TRUE
, 0xdeaddead,0xdeaddead, FALSE
),
221 HOWTO ( 4, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0,"DISP8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
222 HOWTO ( 5, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0,"DISP16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
223 HOWTO ( 6, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0,"DISP32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
224 HOWTO ( 7, 0, 4, 64, TRUE
, 0, complain_overflow_signed
, 0,"DISP64", TRUE
, 0xfeedface,0xfeedface, FALSE
),
225 HOWTO ( 8, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"GOT_REL", FALSE
, 0,0x00000000, FALSE
),
226 HOWTO ( 9, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"BASE16", FALSE
,0xffffffff,0xffffffff, FALSE
),
227 HOWTO (10, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"BASE32", FALSE
,0xffffffff,0xffffffff, FALSE
),
233 HOWTO (16, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"JMP_TABLE", FALSE
, 0,0x00000000, FALSE
),
249 HOWTO (32, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"RELATIVE", FALSE
, 0,0x00000000, FALSE
),
257 HOWTO (40, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"BASEREL", FALSE
, 0,0x00000000, FALSE
),
260 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
263 NAME (aout
, reloc_type_lookup
) (bfd
*abfd
, bfd_reloc_code_real_type code
)
265 #define EXT(i, j) case i: return & howto_table_ext [j]
266 #define STD(i, j) case i: return & howto_table_std [j]
267 int ext
= obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
;
269 if (code
== BFD_RELOC_CTOR
)
270 switch (bfd_arch_bits_per_address (abfd
))
283 EXT (BFD_RELOC_8
, 0);
284 EXT (BFD_RELOC_16
, 1);
285 EXT (BFD_RELOC_32
, 2);
286 EXT (BFD_RELOC_HI22
, 8);
287 EXT (BFD_RELOC_LO10
, 11);
288 EXT (BFD_RELOC_32_PCREL_S2
, 6);
289 EXT (BFD_RELOC_SPARC_WDISP22
, 7);
290 EXT (BFD_RELOC_SPARC13
, 10);
291 EXT (BFD_RELOC_SPARC_GOT10
, 14);
292 EXT (BFD_RELOC_SPARC_BASE13
, 15);
293 EXT (BFD_RELOC_SPARC_GOT13
, 15);
294 EXT (BFD_RELOC_SPARC_GOT22
, 16);
295 EXT (BFD_RELOC_SPARC_PC10
, 17);
296 EXT (BFD_RELOC_SPARC_PC22
, 18);
297 EXT (BFD_RELOC_SPARC_WPLT30
, 19);
298 EXT (BFD_RELOC_SPARC_REV32
, 26);
306 STD (BFD_RELOC_8
, 0);
307 STD (BFD_RELOC_16
, 1);
308 STD (BFD_RELOC_32
, 2);
309 STD (BFD_RELOC_8_PCREL
, 4);
310 STD (BFD_RELOC_16_PCREL
, 5);
311 STD (BFD_RELOC_32_PCREL
, 6);
312 STD (BFD_RELOC_16_BASEREL
, 9);
313 STD (BFD_RELOC_32_BASEREL
, 10);
320 NAME (aout
, reloc_name_lookup
) (bfd
*abfd
, const char *r_name
)
322 unsigned int i
, size
;
323 reloc_howto_type
*howto_table
;
325 if (obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
)
327 howto_table
= howto_table_ext
;
328 size
= sizeof (howto_table_ext
) / sizeof (howto_table_ext
[0]);
332 howto_table
= howto_table_std
;
333 size
= sizeof (howto_table_std
) / sizeof (howto_table_std
[0]);
336 for (i
= 0; i
< size
; i
++)
337 if (howto_table
[i
].name
!= NULL
338 && strcasecmp (howto_table
[i
].name
, r_name
) == 0)
339 return &howto_table
[i
];
346 Internal entry points
349 @file{aoutx.h} exports several routines for accessing the
350 contents of an a.out file, which are gathered and exported in
351 turn by various format specific files (eg sunos.c).
356 aout_@var{size}_swap_exec_header_in
359 void aout_@var{size}_swap_exec_header_in,
361 struct external_exec *bytes,
362 struct internal_exec *execp);
365 Swap the information in an executable header @var{raw_bytes} taken
366 from a raw byte stream memory image into the internal exec header
367 structure @var{execp}.
370 #ifndef NAME_swap_exec_header_in
372 NAME (aout
, swap_exec_header_in
) (bfd
*abfd
,
373 struct external_exec
*bytes
,
374 struct internal_exec
*execp
)
376 /* The internal_exec structure has some fields that are unused in this
377 configuration (IE for i960), so ensure that all such uninitialized
378 fields are zero'd out. There are places where two of these structs
379 are memcmp'd, and thus the contents do matter. */
380 memset ((void *) execp
, 0, sizeof (struct internal_exec
));
381 /* Now fill in fields in the execp, from the bytes in the raw data. */
382 execp
->a_info
= H_GET_32 (abfd
, bytes
->e_info
);
383 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
384 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
385 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
386 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
387 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
388 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
389 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
391 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
396 aout_@var{size}_swap_exec_header_out
399 void aout_@var{size}_swap_exec_header_out
401 struct internal_exec *execp,
402 struct external_exec *raw_bytes);
405 Swap the information in an internal exec header structure
406 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
409 NAME (aout
, swap_exec_header_out
) (bfd
*abfd
,
410 struct internal_exec
*execp
,
411 struct external_exec
*bytes
)
413 /* Now fill in fields in the raw data, from the fields in the exec struct. */
414 H_PUT_32 (abfd
, execp
->a_info
, bytes
->e_info
);
415 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
416 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
417 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
418 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
419 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
420 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
421 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
424 /* Make all the section for an a.out file. */
427 NAME (aout
, make_sections
) (bfd
*abfd
)
429 if (obj_textsec (abfd
) == NULL
&& bfd_make_section (abfd
, ".text") == NULL
)
431 if (obj_datasec (abfd
) == NULL
&& bfd_make_section (abfd
, ".data") == NULL
)
433 if (obj_bsssec (abfd
) == NULL
&& bfd_make_section (abfd
, ".bss") == NULL
)
440 aout_@var{size}_some_aout_object_p
443 const bfd_target *aout_@var{size}_some_aout_object_p
445 struct internal_exec *execp,
446 const bfd_target *(*callback_to_real_object_p) (bfd *));
449 Some a.out variant thinks that the file open in @var{abfd}
450 checking is an a.out file. Do some more checking, and set up
451 for access if it really is. Call back to the calling
452 environment's "finish up" function just before returning, to
453 handle any last-minute setup.
457 NAME (aout
, some_aout_object_p
) (bfd
*abfd
,
458 struct internal_exec
*execp
,
459 const bfd_target
*(*callback_to_real_object_p
) (bfd
*))
461 struct aout_data_struct
*rawptr
, *oldrawptr
;
462 const bfd_target
*result
;
463 bfd_size_type amt
= sizeof (* rawptr
);
465 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
469 oldrawptr
= abfd
->tdata
.aout_data
;
470 abfd
->tdata
.aout_data
= rawptr
;
472 /* Copy the contents of the old tdata struct.
473 In particular, we want the subformat, since for hpux it was set in
474 hp300hpux.c:swap_exec_header_in and will be used in
475 hp300hpux.c:callback. */
476 if (oldrawptr
!= NULL
)
477 *abfd
->tdata
.aout_data
= *oldrawptr
;
479 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
480 /* Copy in the internal_exec struct. */
481 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
;
482 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
484 /* Set the file flags. */
485 abfd
->flags
= BFD_NO_FLAGS
;
486 if (execp
->a_drsize
|| execp
->a_trsize
)
487 abfd
->flags
|= HAS_RELOC
;
488 /* Setting of EXEC_P has been deferred to the bottom of this function. */
490 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
491 if (N_DYNAMIC (execp
))
492 abfd
->flags
|= DYNAMIC
;
494 if (N_MAGIC (execp
) == ZMAGIC
)
496 abfd
->flags
|= D_PAGED
| WP_TEXT
;
497 adata (abfd
).magic
= z_magic
;
499 else if (N_MAGIC (execp
) == QMAGIC
)
501 abfd
->flags
|= D_PAGED
| WP_TEXT
;
502 adata (abfd
).magic
= z_magic
;
503 adata (abfd
).subformat
= q_magic_format
;
505 else if (N_MAGIC (execp
) == NMAGIC
)
507 abfd
->flags
|= WP_TEXT
;
508 adata (abfd
).magic
= n_magic
;
510 else if (N_MAGIC (execp
) == OMAGIC
511 || N_MAGIC (execp
) == BMAGIC
)
512 adata (abfd
).magic
= o_magic
;
514 /* Should have been checked with N_BADMAG before this routine
518 bfd_get_start_address (abfd
) = execp
->a_entry
;
520 obj_aout_symbols (abfd
) = NULL
;
521 bfd_get_symcount (abfd
) = execp
->a_syms
/ sizeof (struct external_nlist
);
523 /* The default relocation entry size is that of traditional V7 Unix. */
524 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
526 /* The default symbol entry size is that of traditional Unix. */
527 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
530 bfd_init_window (&obj_aout_sym_window (abfd
));
531 bfd_init_window (&obj_aout_string_window (abfd
));
533 obj_aout_external_syms (abfd
) = NULL
;
534 obj_aout_external_strings (abfd
) = NULL
;
535 obj_aout_sym_hashes (abfd
) = NULL
;
537 if (! NAME (aout
, make_sections
) (abfd
))
540 obj_datasec (abfd
)->size
= execp
->a_data
;
541 obj_bsssec (abfd
)->size
= execp
->a_bss
;
543 obj_textsec (abfd
)->flags
=
544 (execp
->a_trsize
!= 0
545 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
546 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
547 obj_datasec (abfd
)->flags
=
548 (execp
->a_drsize
!= 0
549 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
550 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
551 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
553 #ifdef THIS_IS_ONLY_DOCUMENTATION
554 /* The common code can't fill in these things because they depend
555 on either the start address of the text segment, the rounding
556 up of virtual addresses between segments, or the starting file
557 position of the text segment -- all of which varies among different
558 versions of a.out. */
560 /* Call back to the format-dependent code to fill in the rest of the
561 fields and do any further cleanup. Things that should be filled
562 in by the callback: */
564 struct exec
*execp
= exec_hdr (abfd
);
566 obj_textsec (abfd
)->size
= N_TXTSIZE (execp
);
567 /* Data and bss are already filled in since they're so standard. */
569 /* The virtual memory addresses of the sections. */
570 obj_textsec (abfd
)->vma
= N_TXTADDR (execp
);
571 obj_datasec (abfd
)->vma
= N_DATADDR (execp
);
572 obj_bsssec (abfd
)->vma
= N_BSSADDR (execp
);
574 /* The file offsets of the sections. */
575 obj_textsec (abfd
)->filepos
= N_TXTOFF (execp
);
576 obj_datasec (abfd
)->filepos
= N_DATOFF (execp
);
578 /* The file offsets of the relocation info. */
579 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF (execp
);
580 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF (execp
);
582 /* The file offsets of the string table and symbol table. */
583 obj_str_filepos (abfd
) = N_STROFF (execp
);
584 obj_sym_filepos (abfd
) = N_SYMOFF (execp
);
586 /* Determine the architecture and machine type of the object file. */
587 switch (N_MACHTYPE (exec_hdr (abfd
)))
590 abfd
->obj_arch
= bfd_arch_obscure
;
594 adata (abfd
)->page_size
= TARGET_PAGE_SIZE
;
595 adata (abfd
)->segment_size
= SEGMENT_SIZE
;
596 adata (abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
600 /* The architecture is encoded in various ways in various a.out variants,
601 or is not encoded at all in some of them. The relocation size depends
602 on the architecture and the a.out variant. Finally, the return value
603 is the bfd_target vector in use. If an error occurs, return zero and
604 set bfd_error to the appropriate error code.
606 Formats such as b.out, which have additional fields in the a.out
607 header, should cope with them in this callback as well. */
608 #endif /* DOCUMENTATION */
610 result
= (*callback_to_real_object_p
) (abfd
);
612 /* Now that the segment addresses have been worked out, take a better
613 guess at whether the file is executable. If the entry point
614 is within the text segment, assume it is. (This makes files
615 executable even if their entry point address is 0, as long as
616 their text starts at zero.).
618 This test had to be changed to deal with systems where the text segment
619 runs at a different location than the default. The problem is that the
620 entry address can appear to be outside the text segment, thus causing an
621 erroneous conclusion that the file isn't executable.
623 To fix this, we now accept any non-zero entry point as an indication of
624 executability. This will work most of the time, since only the linker
625 sets the entry point, and that is likely to be non-zero for most systems. */
627 if (execp
->a_entry
!= 0
628 || (execp
->a_entry
>= obj_textsec (abfd
)->vma
629 && execp
->a_entry
< (obj_textsec (abfd
)->vma
630 + obj_textsec (abfd
)->size
)
631 && execp
->a_trsize
== 0
632 && execp
->a_drsize
== 0))
633 abfd
->flags
|= EXEC_P
;
637 struct stat stat_buf
;
639 /* The original heuristic doesn't work in some important cases.
640 The a.out file has no information about the text start
641 address. For files (like kernels) linked to non-standard
642 addresses (ld -Ttext nnn) the entry point may not be between
643 the default text start (obj_textsec(abfd)->vma) and
644 (obj_textsec(abfd)->vma) + text size. This is not just a mach
645 issue. Many kernels are loaded at non standard addresses. */
646 if (abfd
->iostream
!= NULL
647 && (abfd
->flags
& BFD_IN_MEMORY
) == 0
648 && (fstat (fileno ((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
649 && ((stat_buf
.st_mode
& 0111) != 0))
650 abfd
->flags
|= EXEC_P
;
652 #endif /* STAT_FOR_EXEC */
658 bfd_release (abfd
, rawptr
);
659 abfd
->tdata
.aout_data
= oldrawptr
;
665 aout_@var{size}_mkobject
668 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
671 Initialize BFD @var{abfd} for use with a.out files.
675 NAME (aout
, mkobject
) (bfd
*abfd
)
677 struct aout_data_struct
*rawptr
;
678 bfd_size_type amt
= sizeof (* rawptr
);
680 bfd_set_error (bfd_error_system_call
);
682 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
686 abfd
->tdata
.aout_data
= rawptr
;
687 exec_hdr (abfd
) = &(rawptr
->e
);
689 obj_textsec (abfd
) = NULL
;
690 obj_datasec (abfd
) = NULL
;
691 obj_bsssec (abfd
) = NULL
;
698 aout_@var{size}_machine_type
701 enum machine_type aout_@var{size}_machine_type
702 (enum bfd_architecture arch,
703 unsigned long machine,
704 bfd_boolean *unknown);
707 Keep track of machine architecture and machine type for
708 a.out's. Return the <<machine_type>> for a particular
709 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
710 and machine can't be represented in a.out format.
712 If the architecture is understood, machine type 0 (default)
713 is always understood.
717 NAME (aout
, machine_type
) (enum bfd_architecture arch
,
718 unsigned long machine
,
719 bfd_boolean
*unknown
)
721 enum machine_type arch_flags
;
723 arch_flags
= M_UNKNOWN
;
730 || machine
== bfd_mach_sparc
731 || machine
== bfd_mach_sparc_sparclite
732 || machine
== bfd_mach_sparc_sparclite_le
733 || machine
== bfd_mach_sparc_v8plus
734 || machine
== bfd_mach_sparc_v8plusa
735 || machine
== bfd_mach_sparc_v8plusb
736 || machine
== bfd_mach_sparc_v9
737 || machine
== bfd_mach_sparc_v9a
738 || machine
== bfd_mach_sparc_v9b
)
739 arch_flags
= M_SPARC
;
740 else if (machine
== bfd_mach_sparc_sparclet
)
741 arch_flags
= M_SPARCLET
;
747 case 0: arch_flags
= M_68010
; break;
748 case bfd_mach_m68000
: arch_flags
= M_UNKNOWN
; *unknown
= FALSE
; break;
749 case bfd_mach_m68010
: arch_flags
= M_68010
; break;
750 case bfd_mach_m68020
: arch_flags
= M_68020
; break;
751 default: arch_flags
= M_UNKNOWN
; break;
757 || machine
== bfd_mach_i386_i386
758 || machine
== bfd_mach_i386_i386_intel_syntax
)
771 case bfd_mach_mips3000
:
772 case bfd_mach_mips3900
:
773 arch_flags
= M_MIPS1
;
775 case bfd_mach_mips6000
:
776 arch_flags
= M_MIPS2
;
778 case bfd_mach_mips4000
:
779 case bfd_mach_mips4010
:
780 case bfd_mach_mips4100
:
781 case bfd_mach_mips4300
:
782 case bfd_mach_mips4400
:
783 case bfd_mach_mips4600
:
784 case bfd_mach_mips4650
:
785 case bfd_mach_mips8000
:
786 case bfd_mach_mips9000
:
787 case bfd_mach_mips10000
:
788 case bfd_mach_mips12000
:
789 case bfd_mach_mips14000
:
790 case bfd_mach_mips16000
:
791 case bfd_mach_mips16
:
792 case bfd_mach_mipsisa32
:
793 case bfd_mach_mipsisa32r2
:
794 case bfd_mach_mipsisa32r3
:
795 case bfd_mach_mipsisa32r5
:
796 case bfd_mach_mipsisa32r6
:
798 case bfd_mach_mipsisa64
:
799 case bfd_mach_mipsisa64r2
:
800 case bfd_mach_mipsisa64r3
:
801 case bfd_mach_mipsisa64r5
:
802 case bfd_mach_mipsisa64r6
:
803 case bfd_mach_mips_sb1
:
804 case bfd_mach_mips_xlr
:
805 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
806 arch_flags
= M_MIPS2
;
809 arch_flags
= M_UNKNOWN
;
817 case 0: arch_flags
= M_NS32532
; break;
818 case 32032: arch_flags
= M_NS32032
; break;
819 case 32532: arch_flags
= M_NS32532
; break;
820 default: arch_flags
= M_UNKNOWN
; break;
829 if (machine
== 0 || machine
== 255)
838 arch_flags
= M_UNKNOWN
;
841 if (arch_flags
!= M_UNKNOWN
)
849 aout_@var{size}_set_arch_mach
852 bfd_boolean aout_@var{size}_set_arch_mach,
854 enum bfd_architecture arch,
855 unsigned long machine);
858 Set the architecture and the machine of the BFD @var{abfd} to the
859 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
860 can support the architecture required.
864 NAME (aout
, set_arch_mach
) (bfd
*abfd
,
865 enum bfd_architecture arch
,
866 unsigned long machine
)
868 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
871 if (arch
!= bfd_arch_unknown
)
875 NAME (aout
, machine_type
) (arch
, machine
, &unknown
);
880 /* Determine the size of a relocation entry. */
885 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
888 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
892 return (*aout_backend_info (abfd
)->set_sizes
) (abfd
);
896 adjust_o_magic (bfd
*abfd
, struct internal_exec
*execp
)
898 file_ptr pos
= adata (abfd
).exec_bytes_size
;
903 obj_textsec (abfd
)->filepos
= pos
;
904 if (!obj_textsec (abfd
)->user_set_vma
)
905 obj_textsec (abfd
)->vma
= vma
;
907 vma
= obj_textsec (abfd
)->vma
;
909 pos
+= obj_textsec (abfd
)->size
;
910 vma
+= obj_textsec (abfd
)->size
;
913 if (!obj_datasec (abfd
)->user_set_vma
)
915 obj_textsec (abfd
)->size
+= pad
;
918 obj_datasec (abfd
)->vma
= vma
;
921 vma
= obj_datasec (abfd
)->vma
;
922 obj_datasec (abfd
)->filepos
= pos
;
923 pos
+= obj_datasec (abfd
)->size
;
924 vma
+= obj_datasec (abfd
)->size
;
927 if (!obj_bsssec (abfd
)->user_set_vma
)
929 obj_datasec (abfd
)->size
+= pad
;
932 obj_bsssec (abfd
)->vma
= vma
;
936 /* The VMA of the .bss section is set by the VMA of the
937 .data section plus the size of the .data section. We may
938 need to add padding bytes to make this true. */
939 pad
= obj_bsssec (abfd
)->vma
- vma
;
942 obj_datasec (abfd
)->size
+= pad
;
946 obj_bsssec (abfd
)->filepos
= pos
;
948 /* Fix up the exec header. */
949 execp
->a_text
= obj_textsec (abfd
)->size
;
950 execp
->a_data
= obj_datasec (abfd
)->size
;
951 execp
->a_bss
= obj_bsssec (abfd
)->size
;
952 N_SET_MAGIC (execp
, OMAGIC
);
956 adjust_z_magic (bfd
*abfd
, struct internal_exec
*execp
)
958 bfd_size_type data_pad
, text_pad
;
960 const struct aout_backend_data
*abdp
;
961 /* TRUE if text includes exec header. */
964 abdp
= aout_backend_info (abfd
);
968 && (abdp
->text_includes_header
969 || obj_aout_subformat (abfd
) == q_magic_format
));
970 obj_textsec (abfd
)->filepos
= (ztih
971 ? adata (abfd
).exec_bytes_size
972 : adata (abfd
).zmagic_disk_block_size
);
973 if (! obj_textsec (abfd
)->user_set_vma
)
975 /* ?? Do we really need to check for relocs here? */
976 obj_textsec (abfd
)->vma
= ((abfd
->flags
& HAS_RELOC
)
979 ? (abdp
->default_text_vma
980 + adata (abfd
).exec_bytes_size
)
981 : abdp
->default_text_vma
));
986 /* The .text section is being loaded at an unusual address. We
987 may need to pad it such that the .data section starts at a page
990 text_pad
= ((obj_textsec (abfd
)->filepos
- obj_textsec (abfd
)->vma
)
991 & (adata (abfd
).page_size
- 1));
993 text_pad
= ((- obj_textsec (abfd
)->vma
)
994 & (adata (abfd
).page_size
- 1));
997 /* Find start of data. */
1000 text_end
= obj_textsec (abfd
)->filepos
+ obj_textsec (abfd
)->size
;
1001 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1005 /* Note that if page_size == zmagic_disk_block_size, then
1006 filepos == page_size, and this case is the same as the ztih
1008 text_end
= obj_textsec (abfd
)->size
;
1009 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1010 text_end
+= obj_textsec (abfd
)->filepos
;
1012 obj_textsec (abfd
)->size
+= text_pad
;
1013 text_end
+= text_pad
;
1016 if (!obj_datasec (abfd
)->user_set_vma
)
1019 vma
= obj_textsec (abfd
)->vma
+ obj_textsec (abfd
)->size
;
1020 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1022 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
1024 asection
* text
= obj_textsec (abfd
);
1025 asection
* data
= obj_datasec (abfd
);
1027 text_pad
= data
->vma
- (text
->vma
+ text
->size
);
1028 /* Only pad the text section if the data
1029 section is going to be placed after it. */
1031 text
->size
+= text_pad
;
1033 obj_datasec (abfd
)->filepos
= (obj_textsec (abfd
)->filepos
1034 + obj_textsec (abfd
)->size
);
1036 /* Fix up exec header while we're at it. */
1037 execp
->a_text
= obj_textsec (abfd
)->size
;
1038 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
1039 execp
->a_text
+= adata (abfd
).exec_bytes_size
;
1040 if (obj_aout_subformat (abfd
) == q_magic_format
)
1041 N_SET_MAGIC (execp
, QMAGIC
);
1043 N_SET_MAGIC (execp
, ZMAGIC
);
1045 /* Spec says data section should be rounded up to page boundary. */
1046 obj_datasec (abfd
)->size
1047 = align_power (obj_datasec (abfd
)->size
,
1048 obj_bsssec (abfd
)->alignment_power
);
1049 execp
->a_data
= BFD_ALIGN (obj_datasec (abfd
)->size
,
1050 adata (abfd
).page_size
);
1051 data_pad
= execp
->a_data
- obj_datasec (abfd
)->size
;
1054 if (!obj_bsssec (abfd
)->user_set_vma
)
1055 obj_bsssec (abfd
)->vma
= (obj_datasec (abfd
)->vma
1056 + obj_datasec (abfd
)->size
);
1057 /* If the BSS immediately follows the data section and extra space
1058 in the page is left after the data section, fudge data
1059 in the header so that the bss section looks smaller by that
1060 amount. We'll start the bss section there, and lie to the OS.
1061 (Note that a linker script, as well as the above assignment,
1062 could have explicitly set the BSS vma to immediately follow
1063 the data section.) */
1064 if (align_power (obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->alignment_power
)
1065 == obj_datasec (abfd
)->vma
+ obj_datasec (abfd
)->size
)
1066 execp
->a_bss
= (data_pad
> obj_bsssec (abfd
)->size
1067 ? 0 : obj_bsssec (abfd
)->size
- data_pad
);
1069 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1073 adjust_n_magic (bfd
*abfd
, struct internal_exec
*execp
)
1075 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1080 obj_textsec (abfd
)->filepos
= pos
;
1081 if (!obj_textsec (abfd
)->user_set_vma
)
1082 obj_textsec (abfd
)->vma
= vma
;
1084 vma
= obj_textsec (abfd
)->vma
;
1085 pos
+= obj_textsec (abfd
)->size
;
1086 vma
+= obj_textsec (abfd
)->size
;
1089 obj_datasec (abfd
)->filepos
= pos
;
1090 if (!obj_datasec (abfd
)->user_set_vma
)
1091 obj_datasec (abfd
)->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1092 vma
= obj_datasec (abfd
)->vma
;
1094 /* Since BSS follows data immediately, see if it needs alignment. */
1095 vma
+= obj_datasec (abfd
)->size
;
1096 pad
= align_power (vma
, obj_bsssec (abfd
)->alignment_power
) - vma
;
1097 obj_datasec (abfd
)->size
+= pad
;
1098 pos
+= obj_datasec (abfd
)->size
;
1101 if (!obj_bsssec (abfd
)->user_set_vma
)
1102 obj_bsssec (abfd
)->vma
= vma
;
1104 vma
= obj_bsssec (abfd
)->vma
;
1106 /* Fix up exec header. */
1107 execp
->a_text
= obj_textsec (abfd
)->size
;
1108 execp
->a_data
= obj_datasec (abfd
)->size
;
1109 execp
->a_bss
= obj_bsssec (abfd
)->size
;
1110 N_SET_MAGIC (execp
, NMAGIC
);
1114 NAME (aout
, adjust_sizes_and_vmas
) (bfd
*abfd
)
1116 struct internal_exec
*execp
= exec_hdr (abfd
);
1118 if (! NAME (aout
, make_sections
) (abfd
))
1121 if (adata (abfd
).magic
!= undecided_magic
)
1124 obj_textsec (abfd
)->size
=
1125 align_power (obj_textsec (abfd
)->size
,
1126 obj_textsec (abfd
)->alignment_power
);
1128 /* Rule (heuristic) for when to pad to a new page. Note that there
1129 are (at least) two ways demand-paged (ZMAGIC) files have been
1130 handled. Most Berkeley-based systems start the text segment at
1131 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1132 segment right after the exec header; the latter is counted in the
1133 text segment size, and is paged in by the kernel with the rest of
1136 /* This perhaps isn't the right way to do this, but made it simpler for me
1137 to understand enough to implement it. Better would probably be to go
1138 right from BFD flags to alignment/positioning characteristics. But the
1139 old code was sloppy enough about handling the flags, and had enough
1140 other magic, that it was a little hard for me to understand. I think
1141 I understand it better now, but I haven't time to do the cleanup this
1144 if (abfd
->flags
& D_PAGED
)
1145 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1146 adata (abfd
).magic
= z_magic
;
1147 else if (abfd
->flags
& WP_TEXT
)
1148 adata (abfd
).magic
= n_magic
;
1150 adata (abfd
).magic
= o_magic
;
1152 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1154 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1156 switch (adata (abfd
).magic
)
1158 case n_magic
: str
= "NMAGIC"; break;
1159 case o_magic
: str
= "OMAGIC"; break;
1160 case z_magic
: str
= "ZMAGIC"; break;
1165 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1166 obj_textsec (abfd
)->alignment_power
,
1167 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1168 obj_datasec (abfd
)->alignment_power
,
1169 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
,
1170 obj_bsssec (abfd
)->alignment_power
);
1174 switch (adata (abfd
).magic
)
1177 adjust_o_magic (abfd
, execp
);
1180 adjust_z_magic (abfd
, execp
);
1183 adjust_n_magic (abfd
, execp
);
1189 #ifdef BFD_AOUT_DEBUG
1190 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1191 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1192 obj_textsec (abfd
)->filepos
,
1193 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1194 obj_datasec (abfd
)->filepos
,
1195 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
);
1203 aout_@var{size}_new_section_hook
1206 bfd_boolean aout_@var{size}_new_section_hook,
1211 Called by the BFD in response to a @code{bfd_make_section}
1215 NAME (aout
, new_section_hook
) (bfd
*abfd
, asection
*newsect
)
1217 /* Align to double at least. */
1218 newsect
->alignment_power
= bfd_get_arch_info (abfd
)->section_align_power
;
1220 if (bfd_get_format (abfd
) == bfd_object
)
1222 if (obj_textsec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".text"))
1224 obj_textsec (abfd
)= newsect
;
1225 newsect
->target_index
= N_TEXT
;
1227 else if (obj_datasec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".data"))
1229 obj_datasec (abfd
) = newsect
;
1230 newsect
->target_index
= N_DATA
;
1232 else if (obj_bsssec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".bss"))
1234 obj_bsssec (abfd
) = newsect
;
1235 newsect
->target_index
= N_BSS
;
1239 /* We allow more than three sections internally. */
1240 return _bfd_generic_new_section_hook (abfd
, newsect
);
1244 NAME (aout
, set_section_contents
) (bfd
*abfd
,
1246 const void * location
,
1248 bfd_size_type count
)
1250 if (! abfd
->output_has_begun
)
1252 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
1256 if (section
== obj_bsssec (abfd
))
1258 bfd_set_error (bfd_error_no_contents
);
1262 if (section
!= obj_textsec (abfd
)
1263 && section
!= obj_datasec (abfd
))
1265 if (aout_section_merge_with_text_p (abfd
, section
))
1266 section
->filepos
= obj_textsec (abfd
)->filepos
+
1267 (section
->vma
- obj_textsec (abfd
)->vma
);
1270 (*_bfd_error_handler
)
1271 (_("%s: can not represent section `%s' in a.out object file format"),
1272 bfd_get_filename (abfd
), bfd_get_section_name (abfd
, section
));
1273 bfd_set_error (bfd_error_nonrepresentable_section
);
1280 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1281 || bfd_bwrite (location
, count
, abfd
) != count
)
1288 /* Read the external symbols from an a.out file. */
1291 aout_get_external_symbols (bfd
*abfd
)
1293 if (obj_aout_external_syms (abfd
) == NULL
)
1295 bfd_size_type count
;
1296 struct external_nlist
*syms
;
1297 bfd_size_type amt
= exec_hdr (abfd
)->a_syms
;
1299 count
= amt
/ EXTERNAL_NLIST_SIZE
;
1301 return TRUE
; /* Nothing to do. */
1304 if (! bfd_get_file_window (abfd
, obj_sym_filepos (abfd
), amt
,
1305 &obj_aout_sym_window (abfd
), TRUE
))
1307 syms
= (struct external_nlist
*) obj_aout_sym_window (abfd
).data
;
1309 /* We allocate using malloc to make the values easy to free
1310 later on. If we put them on the objalloc it might not be
1311 possible to free them. */
1312 syms
= (struct external_nlist
*) bfd_malloc (amt
);
1316 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1317 || bfd_bread (syms
, amt
, abfd
) != amt
)
1324 obj_aout_external_syms (abfd
) = syms
;
1325 obj_aout_external_sym_count (abfd
) = count
;
1328 if (obj_aout_external_strings (abfd
) == NULL
1329 && exec_hdr (abfd
)->a_syms
!= 0)
1331 unsigned char string_chars
[BYTES_IN_WORD
];
1332 bfd_size_type stringsize
;
1334 bfd_size_type amt
= BYTES_IN_WORD
;
1336 /* Get the size of the strings. */
1337 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1338 || bfd_bread ((void *) string_chars
, amt
, abfd
) != amt
)
1340 stringsize
= GET_WORD (abfd
, string_chars
);
1343 if (! bfd_get_file_window (abfd
, obj_str_filepos (abfd
), stringsize
,
1344 &obj_aout_string_window (abfd
), TRUE
))
1346 strings
= (char *) obj_aout_string_window (abfd
).data
;
1348 strings
= (char *) bfd_malloc (stringsize
+ 1);
1349 if (strings
== NULL
)
1352 /* Skip space for the string count in the buffer for convenience
1353 when using indexes. */
1354 amt
= stringsize
- BYTES_IN_WORD
;
1355 if (bfd_bread (strings
+ BYTES_IN_WORD
, amt
, abfd
) != amt
)
1362 /* Ensure that a zero index yields an empty string. */
1365 strings
[stringsize
- 1] = 0;
1367 obj_aout_external_strings (abfd
) = strings
;
1368 obj_aout_external_string_size (abfd
) = stringsize
;
1374 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1375 and symbol->value fields of CACHE_PTR will be set from the a.out
1376 nlist structure. This function is responsible for setting
1377 symbol->flags and symbol->section, and adjusting symbol->value. */
1380 translate_from_native_sym_flags (bfd
*abfd
, aout_symbol_type
*cache_ptr
)
1384 if ((cache_ptr
->type
& N_STAB
) != 0
1385 || cache_ptr
->type
== N_FN
)
1389 /* This is a debugging symbol. */
1390 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1392 /* Work out the symbol section. */
1393 switch (cache_ptr
->type
& N_TYPE
)
1397 sec
= obj_textsec (abfd
);
1400 sec
= obj_datasec (abfd
);
1403 sec
= obj_bsssec (abfd
);
1407 sec
= bfd_abs_section_ptr
;
1411 cache_ptr
->symbol
.section
= sec
;
1412 cache_ptr
->symbol
.value
-= sec
->vma
;
1417 /* Get the default visibility. This does not apply to all types, so
1418 we just hold it in a local variable to use if wanted. */
1419 if ((cache_ptr
->type
& N_EXT
) == 0)
1420 visible
= BSF_LOCAL
;
1422 visible
= BSF_GLOBAL
;
1424 switch (cache_ptr
->type
)
1427 case N_ABS
: case N_ABS
| N_EXT
:
1428 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1429 cache_ptr
->symbol
.flags
= visible
;
1432 case N_UNDF
| N_EXT
:
1433 if (cache_ptr
->symbol
.value
!= 0)
1435 /* This is a common symbol. */
1436 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1437 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1441 cache_ptr
->symbol
.flags
= 0;
1442 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1446 case N_TEXT
: case N_TEXT
| N_EXT
:
1447 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1448 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1449 cache_ptr
->symbol
.flags
= visible
;
1452 /* N_SETV symbols used to represent set vectors placed in the
1453 data section. They are no longer generated. Theoretically,
1454 it was possible to extract the entries and combine them with
1455 new ones, although I don't know if that was ever actually
1456 done. Unless that feature is restored, treat them as data
1458 case N_SETV
: case N_SETV
| N_EXT
:
1459 case N_DATA
: case N_DATA
| N_EXT
:
1460 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1461 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1462 cache_ptr
->symbol
.flags
= visible
;
1465 case N_BSS
: case N_BSS
| N_EXT
:
1466 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1467 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1468 cache_ptr
->symbol
.flags
= visible
;
1471 case N_SETA
: case N_SETA
| N_EXT
:
1472 case N_SETT
: case N_SETT
| N_EXT
:
1473 case N_SETD
: case N_SETD
| N_EXT
:
1474 case N_SETB
: case N_SETB
| N_EXT
:
1476 /* This code is no longer needed. It used to be used to make
1477 the linker handle set symbols, but they are now handled in
1478 the add_symbols routine instead. */
1479 switch (cache_ptr
->type
& N_TYPE
)
1482 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1485 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1488 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1491 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1495 cache_ptr
->symbol
.flags
|= BSF_CONSTRUCTOR
;
1500 /* This symbol is the text of a warning message. The next
1501 symbol is the symbol to associate the warning with. If a
1502 reference is made to that symbol, a warning is issued. */
1503 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_WARNING
;
1504 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1507 case N_INDR
: case N_INDR
| N_EXT
:
1508 /* An indirect symbol. This consists of two symbols in a row.
1509 The first symbol is the name of the indirection. The second
1510 symbol is the name of the target. A reference to the first
1511 symbol becomes a reference to the second. */
1512 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_INDIRECT
| visible
;
1513 cache_ptr
->symbol
.section
= bfd_ind_section_ptr
;
1517 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1518 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1522 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1523 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1527 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1528 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1529 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1533 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1534 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1535 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1539 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1540 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1541 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1548 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1551 translate_to_native_sym_flags (bfd
*abfd
,
1553 struct external_nlist
*sym_pointer
)
1555 bfd_vma value
= cache_ptr
->value
;
1559 /* Mask out any existing type bits in case copying from one section
1561 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1563 sec
= bfd_get_section (cache_ptr
);
1568 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1570 (*_bfd_error_handler
)
1571 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1572 bfd_get_filename (abfd
),
1573 cache_ptr
->name
!= NULL
? cache_ptr
->name
: _("*unknown*"));
1574 bfd_set_error (bfd_error_nonrepresentable_section
);
1578 if (sec
->output_section
!= NULL
)
1580 off
= sec
->output_offset
;
1581 sec
= sec
->output_section
;
1584 if (bfd_is_abs_section (sec
))
1585 sym_pointer
->e_type
[0] |= N_ABS
;
1586 else if (sec
== obj_textsec (abfd
))
1587 sym_pointer
->e_type
[0] |= N_TEXT
;
1588 else if (sec
== obj_datasec (abfd
))
1589 sym_pointer
->e_type
[0] |= N_DATA
;
1590 else if (sec
== obj_bsssec (abfd
))
1591 sym_pointer
->e_type
[0] |= N_BSS
;
1592 else if (bfd_is_und_section (sec
))
1593 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1594 else if (bfd_is_ind_section (sec
))
1595 sym_pointer
->e_type
[0] = N_INDR
;
1596 else if (bfd_is_com_section (sec
))
1597 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1600 if (aout_section_merge_with_text_p (abfd
, sec
))
1601 sym_pointer
->e_type
[0] |= N_TEXT
;
1604 (*_bfd_error_handler
)
1605 (_("%s: can not represent section `%s' in a.out object file format"),
1606 bfd_get_filename (abfd
), bfd_get_section_name (abfd
, sec
));
1607 bfd_set_error (bfd_error_nonrepresentable_section
);
1612 /* Turn the symbol from section relative to absolute again. */
1613 value
+= sec
->vma
+ off
;
1615 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1616 sym_pointer
->e_type
[0] = N_WARNING
;
1618 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1619 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1620 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1621 sym_pointer
->e_type
[0] |= N_EXT
;
1622 else if ((cache_ptr
->flags
& BSF_LOCAL
) != 0)
1623 sym_pointer
->e_type
[0] &= ~N_EXT
;
1625 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1627 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1631 case N_ABS
: type
= N_SETA
; break;
1632 case N_TEXT
: type
= N_SETT
; break;
1633 case N_DATA
: type
= N_SETD
; break;
1634 case N_BSS
: type
= N_SETB
; break;
1636 sym_pointer
->e_type
[0] = type
;
1639 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1643 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1646 case N_ABS
: type
= N_WEAKA
; break;
1647 case N_TEXT
: type
= N_WEAKT
; break;
1648 case N_DATA
: type
= N_WEAKD
; break;
1649 case N_BSS
: type
= N_WEAKB
; break;
1650 case N_UNDF
: type
= N_WEAKU
; break;
1652 sym_pointer
->e_type
[0] = type
;
1655 PUT_WORD (abfd
, value
, sym_pointer
->e_value
);
1660 /* Native-level interface to symbols. */
1663 NAME (aout
, make_empty_symbol
) (bfd
*abfd
)
1665 bfd_size_type amt
= sizeof (aout_symbol_type
);
1667 aout_symbol_type
*new_symbol
= (aout_symbol_type
*) bfd_zalloc (abfd
, amt
);
1670 new_symbol
->symbol
.the_bfd
= abfd
;
1672 return &new_symbol
->symbol
;
1675 /* Translate a set of internal symbols into external symbols. */
1678 NAME (aout
, translate_symbol_table
) (bfd
*abfd
,
1679 aout_symbol_type
*in
,
1680 struct external_nlist
*ext
,
1681 bfd_size_type count
,
1683 bfd_size_type strsize
,
1684 bfd_boolean dynamic
)
1686 struct external_nlist
*ext_end
;
1688 ext_end
= ext
+ count
;
1689 for (; ext
< ext_end
; ext
++, in
++)
1693 x
= GET_WORD (abfd
, ext
->e_strx
);
1694 in
->symbol
.the_bfd
= abfd
;
1696 /* For the normal symbols, the zero index points at the number
1697 of bytes in the string table but is to be interpreted as the
1698 null string. For the dynamic symbols, the number of bytes in
1699 the string table is stored in the __DYNAMIC structure and the
1700 zero index points at an actual string. */
1701 if (x
== 0 && ! dynamic
)
1702 in
->symbol
.name
= "";
1703 else if (x
< strsize
)
1704 in
->symbol
.name
= str
+ x
;
1708 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1709 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1710 in
->other
= H_GET_8 (abfd
, ext
->e_other
);
1711 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1712 in
->symbol
.udata
.p
= NULL
;
1714 if (! translate_from_native_sym_flags (abfd
, in
))
1718 in
->symbol
.flags
|= BSF_DYNAMIC
;
1724 /* We read the symbols into a buffer, which is discarded when this
1725 function exits. We read the strings into a buffer large enough to
1726 hold them all plus all the cached symbol entries. */
1729 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1731 struct external_nlist
*old_external_syms
;
1732 aout_symbol_type
*cached
;
1733 bfd_size_type cached_size
;
1735 /* If there's no work to be done, don't do any. */
1736 if (obj_aout_symbols (abfd
) != NULL
)
1739 old_external_syms
= obj_aout_external_syms (abfd
);
1741 if (! aout_get_external_symbols (abfd
))
1744 cached_size
= obj_aout_external_sym_count (abfd
);
1745 if (cached_size
== 0)
1746 return TRUE
; /* Nothing to do. */
1748 cached_size
*= sizeof (aout_symbol_type
);
1749 cached
= (aout_symbol_type
*) bfd_zmalloc (cached_size
);
1753 /* Convert from external symbol information to internal. */
1754 if (! (NAME (aout
, translate_symbol_table
)
1756 obj_aout_external_syms (abfd
),
1757 obj_aout_external_sym_count (abfd
),
1758 obj_aout_external_strings (abfd
),
1759 obj_aout_external_string_size (abfd
),
1766 bfd_get_symcount (abfd
) = obj_aout_external_sym_count (abfd
);
1768 obj_aout_symbols (abfd
) = cached
;
1770 /* It is very likely that anybody who calls this function will not
1771 want the external symbol information, so if it was allocated
1772 because of our call to aout_get_external_symbols, we free it up
1773 right away to save space. */
1774 if (old_external_syms
== NULL
1775 && obj_aout_external_syms (abfd
) != NULL
)
1778 bfd_free_window (&obj_aout_sym_window (abfd
));
1780 free (obj_aout_external_syms (abfd
));
1782 obj_aout_external_syms (abfd
) = NULL
;
1788 /* We use a hash table when writing out symbols so that we only write
1789 out a particular string once. This helps particularly when the
1790 linker writes out stabs debugging entries, because each different
1791 contributing object file tends to have many duplicate stabs
1794 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1795 if BFD_TRADITIONAL_FORMAT is set. */
1797 /* Get the index of a string in a strtab, adding it if it is not
1800 static inline bfd_size_type
1801 add_to_stringtab (bfd
*abfd
,
1802 struct bfd_strtab_hash
*tab
,
1807 bfd_size_type str_index
;
1809 /* An index of 0 always means the empty string. */
1810 if (str
== 0 || *str
== '\0')
1813 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1814 doesn't understand a hashed string table. */
1816 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1819 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1821 if (str_index
!= (bfd_size_type
) -1)
1822 /* Add BYTES_IN_WORD to the return value to account for the
1823 space taken up by the string table size. */
1824 str_index
+= BYTES_IN_WORD
;
1829 /* Write out a strtab. ABFD is already at the right location in the
1833 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1835 bfd_byte buffer
[BYTES_IN_WORD
];
1836 bfd_size_type amt
= BYTES_IN_WORD
;
1838 /* The string table starts with the size. */
1839 PUT_WORD (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_WORD
, buffer
);
1840 if (bfd_bwrite ((void *) buffer
, amt
, abfd
) != amt
)
1843 return _bfd_stringtab_emit (abfd
, tab
);
1847 NAME (aout
, write_syms
) (bfd
*abfd
)
1849 unsigned int count
;
1850 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1851 struct bfd_strtab_hash
*strtab
;
1853 strtab
= _bfd_stringtab_init ();
1857 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1859 asymbol
*g
= generic
[count
];
1861 struct external_nlist nsp
;
1864 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, FALSE
);
1865 if (indx
== (bfd_size_type
) -1)
1867 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1869 if (bfd_asymbol_flavour (g
) == abfd
->xvec
->flavour
)
1871 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1872 H_PUT_8 (abfd
, aout_symbol (g
)->other
, nsp
.e_other
);
1873 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1877 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1878 H_PUT_8 (abfd
, 0, nsp
.e_other
);
1879 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1882 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1885 amt
= EXTERNAL_NLIST_SIZE
;
1886 if (bfd_bwrite ((void *) &nsp
, amt
, abfd
) != amt
)
1889 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1890 here, at the end. */
1894 if (! emit_stringtab (abfd
, strtab
))
1897 _bfd_stringtab_free (strtab
);
1902 _bfd_stringtab_free (strtab
);
1907 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1909 unsigned int counter
= 0;
1910 aout_symbol_type
*symbase
;
1912 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1915 for (symbase
= obj_aout_symbols (abfd
);
1916 counter
++ < bfd_get_symcount (abfd
);
1918 *(location
++) = (asymbol
*) (symbase
++);
1920 return bfd_get_symcount (abfd
);
1923 /* Standard reloc stuff. */
1924 /* Output standard relocation information to a file in target byte order. */
1926 extern void NAME (aout
, swap_std_reloc_out
)
1927 (bfd
*, arelent
*, struct reloc_std_external
*);
1930 NAME (aout
, swap_std_reloc_out
) (bfd
*abfd
,
1932 struct reloc_std_external
*natptr
)
1935 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1937 unsigned int r_length
;
1939 int r_baserel
, r_jmptable
, r_relative
;
1940 asection
*output_section
= sym
->section
->output_section
;
1942 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
1944 r_length
= g
->howto
->size
; /* Size as a power of two. */
1945 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1946 /* XXX This relies on relocs coming from a.out files. */
1947 r_baserel
= (g
->howto
->type
& 8) != 0;
1948 r_jmptable
= (g
->howto
->type
& 16) != 0;
1949 r_relative
= (g
->howto
->type
& 32) != 0;
1951 /* Name was clobbered by aout_write_syms to be symbol index. */
1953 /* If this relocation is relative to a symbol then set the
1954 r_index to the symbols index, and the r_extern bit.
1956 Absolute symbols can come in in two ways, either as an offset
1957 from the abs section, or as a symbol which has an abs value.
1958 check for that here. */
1960 if (bfd_is_com_section (output_section
)
1961 || bfd_is_abs_section (output_section
)
1962 || bfd_is_und_section (output_section
)
1963 /* PR gas/3041 a.out relocs against weak symbols
1964 must be treated as if they were against externs. */
1965 || (sym
->flags
& BSF_WEAK
))
1967 if (bfd_abs_section_ptr
->symbol
== sym
)
1969 /* Whoops, looked like an abs symbol, but is
1970 really an offset from the abs section. */
1976 /* Fill in symbol. */
1978 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
1983 /* Just an ordinary section. */
1985 r_index
= output_section
->target_index
;
1988 /* Now the fun stuff. */
1989 if (bfd_header_big_endian (abfd
))
1991 natptr
->r_index
[0] = r_index
>> 16;
1992 natptr
->r_index
[1] = r_index
>> 8;
1993 natptr
->r_index
[2] = r_index
;
1994 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
1995 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
1996 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
1997 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
1998 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
1999 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
2003 natptr
->r_index
[2] = r_index
>> 16;
2004 natptr
->r_index
[1] = r_index
>> 8;
2005 natptr
->r_index
[0] = r_index
;
2006 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2007 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2008 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2009 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2010 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2011 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
2015 /* Extended stuff. */
2016 /* Output extended relocation information to a file in target byte order. */
2018 extern void NAME (aout
, swap_ext_reloc_out
)
2019 (bfd
*, arelent
*, struct reloc_ext_external
*);
2022 NAME (aout
, swap_ext_reloc_out
) (bfd
*abfd
,
2024 struct reloc_ext_external
*natptr
)
2028 unsigned int r_type
;
2030 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2031 asection
*output_section
= sym
->section
->output_section
;
2033 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2035 r_type
= (unsigned int) g
->howto
->type
;
2037 r_addend
= g
->addend
;
2038 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2039 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2041 /* If this relocation is relative to a symbol then set the
2042 r_index to the symbols index, and the r_extern bit.
2044 Absolute symbols can come in in two ways, either as an offset
2045 from the abs section, or as a symbol which has an abs value.
2046 check for that here. */
2047 if (bfd_is_abs_section (bfd_get_section (sym
)))
2052 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2054 if (bfd_is_und_section (bfd_get_section (sym
))
2055 || (sym
->flags
& BSF_GLOBAL
) != 0)
2059 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2063 /* Just an ordinary section. */
2065 r_index
= output_section
->target_index
;
2068 /* Now the fun stuff. */
2069 if (bfd_header_big_endian (abfd
))
2071 natptr
->r_index
[0] = r_index
>> 16;
2072 natptr
->r_index
[1] = r_index
>> 8;
2073 natptr
->r_index
[2] = r_index
;
2074 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2075 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2079 natptr
->r_index
[2] = r_index
>> 16;
2080 natptr
->r_index
[1] = r_index
>> 8;
2081 natptr
->r_index
[0] = r_index
;
2082 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2083 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
));
2086 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2089 /* BFD deals internally with all things based from the section they're
2090 in. so, something in 10 bytes into a text section with a base of
2091 50 would have a symbol (.text+10) and know .text vma was 50.
2093 Aout keeps all it's symbols based from zero, so the symbol would
2094 contain 60. This macro subs the base of each section from the value
2095 to give the true offset from the section. */
2097 #define MOVE_ADDRESS(ad) \
2100 /* Undefined symbol. */ \
2101 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2102 cache_ptr->addend = ad; \
2106 /* Defined, section relative. Replace symbol with pointer to \
2107 symbol which points to section. */ \
2111 case N_TEXT | N_EXT: \
2112 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2113 cache_ptr->addend = ad - su->textsec->vma; \
2116 case N_DATA | N_EXT: \
2117 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2118 cache_ptr->addend = ad - su->datasec->vma; \
2121 case N_BSS | N_EXT: \
2122 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2123 cache_ptr->addend = ad - su->bsssec->vma; \
2127 case N_ABS | N_EXT: \
2128 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2129 cache_ptr->addend = ad; \
2135 NAME (aout
, swap_ext_reloc_in
) (bfd
*abfd
,
2136 struct reloc_ext_external
*bytes
,
2139 bfd_size_type symcount
)
2141 unsigned int r_index
;
2143 unsigned int r_type
;
2144 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2146 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2148 /* Now the fun stuff. */
2149 if (bfd_header_big_endian (abfd
))
2151 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2152 | ((unsigned int) bytes
->r_index
[1] << 8)
2153 | bytes
->r_index
[2]);
2154 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2155 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2156 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
2160 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2161 | ((unsigned int) bytes
->r_index
[1] << 8)
2162 | bytes
->r_index
[0]);
2163 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2164 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2165 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2168 if (r_type
< TABLE_SIZE (howto_table_ext
))
2169 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2171 cache_ptr
->howto
= NULL
;
2173 /* Base relative relocs are always against the symbol table,
2174 regardless of the setting of r_extern. r_extern just reflects
2175 whether the symbol the reloc is against is local or global. */
2176 if (r_type
== (unsigned int) RELOC_BASE10
2177 || r_type
== (unsigned int) RELOC_BASE13
2178 || r_type
== (unsigned int) RELOC_BASE22
)
2181 if (r_extern
&& r_index
> symcount
)
2183 /* We could arrange to return an error, but it might be useful
2184 to see the file even if it is bad. */
2189 MOVE_ADDRESS (GET_SWORD (abfd
, bytes
->r_addend
));
2193 NAME (aout
, swap_std_reloc_in
) (bfd
*abfd
,
2194 struct reloc_std_external
*bytes
,
2197 bfd_size_type symcount
)
2199 unsigned int r_index
;
2201 unsigned int r_length
;
2203 int r_baserel
, r_jmptable
, r_relative
;
2204 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2205 unsigned int howto_idx
;
2207 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
2209 /* Now the fun stuff. */
2210 if (bfd_header_big_endian (abfd
))
2212 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2213 | ((unsigned int) bytes
->r_index
[1] << 8)
2214 | bytes
->r_index
[2]);
2215 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2216 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2217 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2218 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2219 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2220 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2221 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
2225 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2226 | ((unsigned int) bytes
->r_index
[1] << 8)
2227 | bytes
->r_index
[0]);
2228 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2229 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2230 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2231 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2232 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2233 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2234 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2237 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2238 + 16 * r_jmptable
+ 32 * r_relative
);
2239 if (howto_idx
< TABLE_SIZE (howto_table_std
))
2241 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2242 if (cache_ptr
->howto
->type
== (unsigned int) -1)
2243 cache_ptr
->howto
= NULL
;
2246 cache_ptr
->howto
= NULL
;
2248 /* Base relative relocs are always against the symbol table,
2249 regardless of the setting of r_extern. r_extern just reflects
2250 whether the symbol the reloc is against is local or global. */
2254 if (r_extern
&& r_index
> symcount
)
2256 /* We could arrange to return an error, but it might be useful
2257 to see the file even if it is bad. */
2265 /* Read and swap the relocs for a section. */
2268 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
2270 bfd_size_type count
;
2271 bfd_size_type reloc_size
;
2273 arelent
*reloc_cache
;
2275 unsigned int counter
= 0;
2279 if (asect
->relocation
)
2282 if (asect
->flags
& SEC_CONSTRUCTOR
)
2285 if (asect
== obj_datasec (abfd
))
2286 reloc_size
= exec_hdr (abfd
)->a_drsize
;
2287 else if (asect
== obj_textsec (abfd
))
2288 reloc_size
= exec_hdr (abfd
)->a_trsize
;
2289 else if (asect
== obj_bsssec (abfd
))
2293 bfd_set_error (bfd_error_invalid_operation
);
2297 if (reloc_size
== 0)
2298 return TRUE
; /* Nothing to be done. */
2300 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2303 each_size
= obj_reloc_entry_size (abfd
);
2305 count
= reloc_size
/ each_size
;
2307 return TRUE
; /* Nothing to be done. */
2309 amt
= count
* sizeof (arelent
);
2310 reloc_cache
= (arelent
*) bfd_zmalloc (amt
);
2311 if (reloc_cache
== NULL
)
2314 relocs
= bfd_malloc (reloc_size
);
2321 if (bfd_bread (relocs
, reloc_size
, abfd
) != reloc_size
)
2328 cache_ptr
= reloc_cache
;
2329 if (each_size
== RELOC_EXT_SIZE
)
2331 struct reloc_ext_external
*rptr
= (struct reloc_ext_external
*) relocs
;
2333 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2334 MY_swap_ext_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2335 (bfd_size_type
) bfd_get_symcount (abfd
));
2339 struct reloc_std_external
*rptr
= (struct reloc_std_external
*) relocs
;
2341 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2342 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2343 (bfd_size_type
) bfd_get_symcount (abfd
));
2348 asect
->relocation
= reloc_cache
;
2349 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2354 /* Write out a relocation section into an object file. */
2357 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2360 unsigned char *native
, *natptr
;
2363 unsigned int count
= section
->reloc_count
;
2364 bfd_size_type natsize
;
2366 if (count
== 0 || section
->orelocation
== NULL
)
2369 each_size
= obj_reloc_entry_size (abfd
);
2370 natsize
= (bfd_size_type
) each_size
* count
;
2371 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2375 generic
= section
->orelocation
;
2377 if (each_size
== RELOC_EXT_SIZE
)
2379 for (natptr
= native
;
2381 --count
, natptr
+= each_size
, ++generic
)
2382 MY_swap_ext_reloc_out (abfd
, *generic
,
2383 (struct reloc_ext_external
*) natptr
);
2387 for (natptr
= native
;
2389 --count
, natptr
+= each_size
, ++generic
)
2390 MY_swap_std_reloc_out (abfd
, *generic
,
2391 (struct reloc_std_external
*) natptr
);
2394 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2396 bfd_release (abfd
, native
);
2399 bfd_release (abfd
, native
);
2404 /* This is stupid. This function should be a boolean predicate. */
2407 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2412 arelent
*tblptr
= section
->relocation
;
2415 if (section
== obj_bsssec (abfd
))
2421 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
) (abfd
, section
, symbols
)))
2424 if (section
->flags
& SEC_CONSTRUCTOR
)
2426 arelent_chain
*chain
= section
->constructor_chain
;
2427 for (count
= 0; count
< section
->reloc_count
; count
++)
2429 *relptr
++ = &chain
->relent
;
2430 chain
= chain
->next
;
2435 tblptr
= section
->relocation
;
2437 for (count
= 0; count
++ < section
->reloc_count
; )
2439 *relptr
++ = tblptr
++;
2444 return section
->reloc_count
;
2448 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2450 if (bfd_get_format (abfd
) != bfd_object
)
2452 bfd_set_error (bfd_error_invalid_operation
);
2456 if (asect
->flags
& SEC_CONSTRUCTOR
)
2457 return sizeof (arelent
*) * (asect
->reloc_count
+ 1);
2459 if (asect
== obj_datasec (abfd
))
2460 return sizeof (arelent
*)
2461 * ((exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
))
2464 if (asect
== obj_textsec (abfd
))
2465 return sizeof (arelent
*)
2466 * ((exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
))
2469 if (asect
== obj_bsssec (abfd
))
2470 return sizeof (arelent
*);
2472 if (asect
== obj_bsssec (abfd
))
2475 bfd_set_error (bfd_error_invalid_operation
);
2480 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2482 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2485 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2489 NAME (aout
, get_lineno
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2490 asymbol
*ignore_symbol ATTRIBUTE_UNUSED
)
2496 NAME (aout
, get_symbol_info
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2500 bfd_symbol_info (symbol
, ret
);
2502 if (ret
->type
== '?')
2504 int type_code
= aout_symbol (symbol
)->type
& 0xff;
2505 const char *stab_name
= bfd_get_stab_name (type_code
);
2506 static char buf
[10];
2508 if (stab_name
== NULL
)
2510 sprintf (buf
, "(%d)", type_code
);
2514 ret
->stab_type
= type_code
;
2515 ret
->stab_other
= (unsigned) (aout_symbol (symbol
)->other
& 0xff);
2516 ret
->stab_desc
= (unsigned) (aout_symbol (symbol
)->desc
& 0xffff);
2517 ret
->stab_name
= stab_name
;
2522 NAME (aout
, print_symbol
) (bfd
*abfd
,
2525 bfd_print_symbol_type how
)
2527 FILE *file
= (FILE *)afile
;
2531 case bfd_print_symbol_name
:
2533 fprintf (file
,"%s", symbol
->name
);
2535 case bfd_print_symbol_more
:
2536 fprintf (file
,"%4x %2x %2x",
2537 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2538 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2539 (unsigned) (aout_symbol (symbol
)->type
));
2541 case bfd_print_symbol_all
:
2543 const char *section_name
= symbol
->section
->name
;
2545 bfd_print_symbol_vandf (abfd
, (void *)file
, symbol
);
2547 fprintf (file
," %-5s %04x %02x %02x",
2549 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2550 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2551 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2553 fprintf (file
," %s", symbol
->name
);
2559 /* If we don't have to allocate more than 1MB to hold the generic
2560 symbols, we use the generic minisymbol methord: it's faster, since
2561 it only translates the symbols once, not multiple times. */
2562 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2564 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2565 symbols. The minisymbol_to_symbol function translates these into
2566 BFD asymbol structures. */
2569 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2570 bfd_boolean dynamic
,
2572 unsigned int *sizep
)
2575 /* We could handle the dynamic symbols here as well, but it's
2576 easier to hand them off. */
2577 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2579 if (! aout_get_external_symbols (abfd
))
2582 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2583 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2585 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2587 /* By passing the external symbols back from this routine, we are
2588 giving up control over the memory block. Clear
2589 obj_aout_external_syms, so that we do not try to free it
2591 obj_aout_external_syms (abfd
) = NULL
;
2593 *sizep
= EXTERNAL_NLIST_SIZE
;
2594 return obj_aout_external_sym_count (abfd
);
2597 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2598 unmodified a.out symbol. The SYM argument is a structure returned
2599 by bfd_make_empty_symbol, which we fill in here. */
2602 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2603 bfd_boolean dynamic
,
2604 const void * minisym
,
2608 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2609 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2611 memset (sym
, 0, sizeof (aout_symbol_type
));
2613 /* We call translate_symbol_table to translate a single symbol. */
2614 if (! (NAME (aout
, translate_symbol_table
)
2616 (aout_symbol_type
*) sym
,
2617 (struct external_nlist
*) minisym
,
2619 obj_aout_external_strings (abfd
),
2620 obj_aout_external_string_size (abfd
),
2627 /* Provided a BFD, a section and an offset into the section, calculate
2628 and return the name of the source file and the line nearest to the
2632 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2636 const char **filename_ptr
,
2637 const char **functionname_ptr
,
2638 unsigned int *line_ptr
,
2639 unsigned int *disriminator_ptr
)
2641 /* Run down the file looking for the filename, function and linenumber. */
2643 const char *directory_name
= NULL
;
2644 const char *main_file_name
= NULL
;
2645 const char *current_file_name
= NULL
;
2646 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2647 const char *line_directory_name
= NULL
; /* Value of directory_name at line number. */
2648 bfd_vma low_line_vma
= 0;
2649 bfd_vma low_func_vma
= 0;
2651 bfd_size_type filelen
, funclen
;
2654 *filename_ptr
= abfd
->filename
;
2655 *functionname_ptr
= 0;
2657 if (disriminator_ptr
)
2658 *disriminator_ptr
= 0;
2660 if (symbols
!= NULL
)
2662 for (p
= symbols
; *p
; p
++)
2664 aout_symbol_type
*q
= (aout_symbol_type
*) (*p
);
2669 /* If this looks like a file name symbol, and it comes after
2670 the line number we have found so far, but before the
2671 offset, then we have probably not found the right line
2673 if (q
->symbol
.value
<= offset
2674 && ((q
->symbol
.value
> low_line_vma
2675 && (line_file_name
!= NULL
2677 || (q
->symbol
.value
> low_func_vma
2680 const char *symname
;
2682 symname
= q
->symbol
.name
;
2683 if (strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2685 if (q
->symbol
.value
> low_line_vma
)
2688 line_file_name
= NULL
;
2690 if (q
->symbol
.value
> low_func_vma
)
2697 /* If this symbol is less than the offset, but greater than
2698 the line number we have found so far, then we have not
2699 found the right line number. */
2700 if (q
->symbol
.value
<= offset
)
2702 if (q
->symbol
.value
> low_line_vma
)
2705 line_file_name
= NULL
;
2707 if (q
->symbol
.value
> low_func_vma
)
2711 main_file_name
= current_file_name
= q
->symbol
.name
;
2712 /* Look ahead to next symbol to check if that too is an N_SO. */
2716 q
= (aout_symbol_type
*) (*p
);
2717 if (q
->type
!= (int)N_SO
)
2720 /* Found a second N_SO First is directory; second is filename. */
2721 directory_name
= current_file_name
;
2722 main_file_name
= current_file_name
= q
->symbol
.name
;
2723 if (obj_textsec (abfd
) != section
)
2727 current_file_name
= q
->symbol
.name
;
2734 /* We'll keep this if it resolves nearer than the one we have
2736 if (q
->symbol
.value
>= low_line_vma
2737 && q
->symbol
.value
<= offset
)
2739 *line_ptr
= q
->desc
;
2740 low_line_vma
= q
->symbol
.value
;
2741 line_file_name
= current_file_name
;
2742 line_directory_name
= directory_name
;
2747 /* We'll keep this if it is nearer than the one we have already. */
2748 if (q
->symbol
.value
>= low_func_vma
&&
2749 q
->symbol
.value
<= offset
)
2751 low_func_vma
= q
->symbol
.value
;
2752 func
= (asymbol
*)q
;
2754 else if (q
->symbol
.value
> offset
)
2765 main_file_name
= line_file_name
;
2766 directory_name
= line_directory_name
;
2769 if (main_file_name
== NULL
2770 || IS_ABSOLUTE_PATH (main_file_name
)
2771 || directory_name
== NULL
)
2774 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2779 funclen
= strlen (bfd_asymbol_name (func
));
2781 if (adata (abfd
).line_buf
!= NULL
)
2782 free (adata (abfd
).line_buf
);
2784 if (filelen
+ funclen
== 0)
2785 adata (abfd
).line_buf
= buf
= NULL
;
2788 buf
= (char *) bfd_malloc (filelen
+ funclen
+ 3);
2789 adata (abfd
).line_buf
= buf
;
2794 if (main_file_name
!= NULL
)
2796 if (IS_ABSOLUTE_PATH (main_file_name
) || directory_name
== NULL
)
2797 *filename_ptr
= main_file_name
;
2800 sprintf (buf
, "%s%s", directory_name
, main_file_name
);
2801 *filename_ptr
= buf
;
2808 const char *function
= func
->name
;
2811 /* The caller expects a symbol name. We actually have a
2812 function name, without the leading underscore. Put the
2813 underscore back in, so that the caller gets a symbol name. */
2814 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2815 strcpy (buf
, function
);
2818 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2819 strcpy (buf
+ 1, function
);
2821 /* Have to remove : stuff. */
2822 colon
= strchr (buf
, ':');
2825 *functionname_ptr
= buf
;
2832 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2833 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2835 return adata (abfd
).exec_bytes_size
;
2838 /* Free all information we have cached for this BFD. We can always
2839 read it again later if we need it. */
2842 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2846 if (bfd_get_format (abfd
) != bfd_object
2847 || abfd
->tdata
.aout_data
== NULL
)
2850 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2851 BFCI_FREE (obj_aout_symbols (abfd
));
2853 obj_aout_external_syms (abfd
) = 0;
2854 bfd_free_window (&obj_aout_sym_window (abfd
));
2855 bfd_free_window (&obj_aout_string_window (abfd
));
2856 obj_aout_external_strings (abfd
) = 0;
2858 BFCI_FREE (obj_aout_external_syms (abfd
));
2859 BFCI_FREE (obj_aout_external_strings (abfd
));
2861 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2862 BFCI_FREE (o
->relocation
);
2868 /* a.out link code. */
2870 /* Routine to create an entry in an a.out link hash table. */
2872 struct bfd_hash_entry
*
2873 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2874 struct bfd_hash_table
*table
,
2877 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2879 /* Allocate the structure if it has not already been allocated by a
2882 ret
= (struct aout_link_hash_entry
*) bfd_hash_allocate (table
,
2887 /* Call the allocation method of the superclass. */
2888 ret
= ((struct aout_link_hash_entry
*)
2889 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2893 /* Set local fields. */
2894 ret
->written
= FALSE
;
2898 return (struct bfd_hash_entry
*) ret
;
2901 /* Initialize an a.out link hash table. */
2904 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2906 struct bfd_hash_entry
*(*newfunc
)
2907 (struct bfd_hash_entry
*, struct bfd_hash_table
*,
2909 unsigned int entsize
)
2911 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2914 /* Create an a.out link hash table. */
2916 struct bfd_link_hash_table
*
2917 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2919 struct aout_link_hash_table
*ret
;
2920 bfd_size_type amt
= sizeof (* ret
);
2922 ret
= (struct aout_link_hash_table
*) bfd_malloc (amt
);
2926 if (!NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2927 NAME (aout
, link_hash_newfunc
),
2928 sizeof (struct aout_link_hash_entry
)))
2936 /* Add all symbols from an object file to the hash table. */
2939 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2941 bfd_boolean (*add_one_symbol
)
2942 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
2943 bfd_vma
, const char *, bfd_boolean
, bfd_boolean
,
2944 struct bfd_link_hash_entry
**);
2945 struct external_nlist
*syms
;
2946 bfd_size_type sym_count
;
2949 struct aout_link_hash_entry
**sym_hash
;
2950 struct external_nlist
*p
;
2951 struct external_nlist
*pend
;
2954 syms
= obj_aout_external_syms (abfd
);
2955 sym_count
= obj_aout_external_sym_count (abfd
);
2956 strings
= obj_aout_external_strings (abfd
);
2957 if (info
->keep_memory
)
2962 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
2964 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
2965 (abfd
, info
, &syms
, &sym_count
, &strings
)))
2970 return TRUE
; /* Nothing to do. */
2972 /* We keep a list of the linker hash table entries that correspond
2973 to particular symbols. We could just look them up in the hash
2974 table, but keeping the list is more efficient. Perhaps this
2975 should be conditional on info->keep_memory. */
2976 amt
= sym_count
* sizeof (struct aout_link_hash_entry
*);
2977 sym_hash
= (struct aout_link_hash_entry
**) bfd_alloc (abfd
, amt
);
2978 if (sym_hash
== NULL
)
2980 obj_aout_sym_hashes (abfd
) = sym_hash
;
2982 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
2983 if (add_one_symbol
== NULL
)
2984 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
2987 pend
= p
+ sym_count
;
2988 for (; p
< pend
; p
++, sym_hash
++)
2999 type
= H_GET_8 (abfd
, p
->e_type
);
3001 /* Ignore debugging symbols. */
3002 if ((type
& N_STAB
) != 0)
3005 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3006 if (GET_WORD (abfd
, p
->e_strx
) > obj_aout_external_string_size (abfd
))
3008 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3010 value
= GET_WORD (abfd
, p
->e_value
);
3027 /* Ignore symbols that are not externally visible. */
3030 /* Ignore local indirect symbol. */
3035 case N_UNDF
| N_EXT
:
3038 section
= bfd_und_section_ptr
;
3042 section
= bfd_com_section_ptr
;
3045 section
= bfd_abs_section_ptr
;
3047 case N_TEXT
| N_EXT
:
3048 section
= obj_textsec (abfd
);
3049 value
-= bfd_get_section_vma (abfd
, section
);
3051 case N_DATA
| N_EXT
:
3052 case N_SETV
| N_EXT
:
3053 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3054 translate_from_native_sym_flags. */
3055 section
= obj_datasec (abfd
);
3056 value
-= bfd_get_section_vma (abfd
, section
);
3059 section
= obj_bsssec (abfd
);
3060 value
-= bfd_get_section_vma (abfd
, section
);
3062 case N_INDR
| N_EXT
:
3063 /* An indirect symbol. The next symbol is the symbol
3064 which this one really is. */
3065 BFD_ASSERT (p
+ 1 < pend
);
3067 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3068 if (GET_WORD (abfd
, p
->e_strx
) > obj_aout_external_string_size (abfd
))
3070 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3071 section
= bfd_ind_section_ptr
;
3072 flags
|= BSF_INDIRECT
;
3074 case N_COMM
| N_EXT
:
3075 section
= bfd_com_section_ptr
;
3077 case N_SETA
: case N_SETA
| N_EXT
:
3078 section
= bfd_abs_section_ptr
;
3079 flags
|= BSF_CONSTRUCTOR
;
3081 case N_SETT
: case N_SETT
| N_EXT
:
3082 section
= obj_textsec (abfd
);
3083 flags
|= BSF_CONSTRUCTOR
;
3084 value
-= bfd_get_section_vma (abfd
, section
);
3086 case N_SETD
: case N_SETD
| N_EXT
:
3087 section
= obj_datasec (abfd
);
3088 flags
|= BSF_CONSTRUCTOR
;
3089 value
-= bfd_get_section_vma (abfd
, section
);
3091 case N_SETB
: case N_SETB
| N_EXT
:
3092 section
= obj_bsssec (abfd
);
3093 flags
|= BSF_CONSTRUCTOR
;
3094 value
-= bfd_get_section_vma (abfd
, section
);
3097 /* A warning symbol. The next symbol is the one to warn
3098 about. If there is no next symbol, just look away. */
3103 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3104 if (GET_WORD (abfd
, p
->e_strx
) > obj_aout_external_string_size (abfd
))
3106 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3107 section
= bfd_und_section_ptr
;
3108 flags
|= BSF_WARNING
;
3111 section
= bfd_und_section_ptr
;
3115 section
= bfd_abs_section_ptr
;
3119 section
= obj_textsec (abfd
);
3120 value
-= bfd_get_section_vma (abfd
, section
);
3124 section
= obj_datasec (abfd
);
3125 value
-= bfd_get_section_vma (abfd
, section
);
3129 section
= obj_bsssec (abfd
);
3130 value
-= bfd_get_section_vma (abfd
, section
);
3135 if (! ((*add_one_symbol
)
3136 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, FALSE
,
3137 (struct bfd_link_hash_entry
**) sym_hash
)))
3140 /* Restrict the maximum alignment of a common symbol based on
3141 the architecture, since a.out has no way to represent
3142 alignment requirements of a section in a .o file. FIXME:
3143 This isn't quite right: it should use the architecture of the
3144 output file, not the input files. */
3145 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3146 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3147 bfd_get_arch_info (abfd
)->section_align_power
))
3148 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3149 bfd_get_arch_info (abfd
)->section_align_power
;
3151 /* If this is a set symbol, and we are not building sets, then
3152 it is possible for the hash entry to not have been set. In
3153 such a case, treat the symbol as not globally defined. */
3154 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3156 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3160 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3167 /* Free up the internal symbols read from an a.out file. */
3170 aout_link_free_symbols (bfd
*abfd
)
3172 if (obj_aout_external_syms (abfd
) != NULL
)
3175 bfd_free_window (&obj_aout_sym_window (abfd
));
3177 free ((void *) obj_aout_external_syms (abfd
));
3179 obj_aout_external_syms (abfd
) = NULL
;
3181 if (obj_aout_external_strings (abfd
) != NULL
)
3184 bfd_free_window (&obj_aout_string_window (abfd
));
3186 free ((void *) obj_aout_external_strings (abfd
));
3188 obj_aout_external_strings (abfd
) = NULL
;
3193 /* Add symbols from an a.out object file. */
3196 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3198 if (! aout_get_external_symbols (abfd
))
3200 if (! aout_link_add_symbols (abfd
, info
))
3202 if (! info
->keep_memory
)
3204 if (! aout_link_free_symbols (abfd
))
3210 /* Look through the internal symbols to see if this object file should
3211 be included in the link. We should include this object file if it
3212 defines any symbols which are currently undefined. If this object
3213 file defines a common symbol, then we may adjust the size of the
3214 known symbol but we do not include the object file in the link
3215 (unless there is some other reason to include it). */
3218 aout_link_check_ar_symbols (bfd
*abfd
,
3219 struct bfd_link_info
*info
,
3220 bfd_boolean
*pneeded
,
3223 struct external_nlist
*p
;
3224 struct external_nlist
*pend
;
3229 /* Look through all the symbols. */
3230 p
= obj_aout_external_syms (abfd
);
3231 pend
= p
+ obj_aout_external_sym_count (abfd
);
3232 strings
= obj_aout_external_strings (abfd
);
3233 for (; p
< pend
; p
++)
3235 int type
= H_GET_8 (abfd
, p
->e_type
);
3237 struct bfd_link_hash_entry
*h
;
3239 /* Ignore symbols that are not externally visible. This is an
3240 optimization only, as we check the type more thoroughly
3242 if (((type
& N_EXT
) == 0
3243 || (type
& N_STAB
) != 0
3250 if (type
== N_WARNING
3256 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3257 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
3259 /* We are only interested in symbols that are currently
3260 undefined or common. */
3262 || (h
->type
!= bfd_link_hash_undefined
3263 && h
->type
!= bfd_link_hash_common
))
3265 if (type
== (N_INDR
| N_EXT
))
3270 if (type
== (N_TEXT
| N_EXT
)
3271 || type
== (N_DATA
| N_EXT
)
3272 || type
== (N_BSS
| N_EXT
)
3273 || type
== (N_ABS
| N_EXT
)
3274 || type
== (N_INDR
| N_EXT
))
3276 /* This object file defines this symbol. We must link it
3277 in. This is true regardless of whether the current
3278 definition of the symbol is undefined or common.
3280 If the current definition is common, we have a case in
3281 which we have already seen an object file including:
3283 and this object file from the archive includes:
3285 In such a case, whether to include this object is target
3286 dependant for backward compatibility.
3288 FIXME: The SunOS 4.1.3 linker will pull in the archive
3289 element if the symbol is defined in the .data section,
3290 but not if it is defined in the .text section. That
3291 seems a bit crazy to me, and it has not been implemented
3292 yet. However, it might be correct. */
3293 if (h
->type
== bfd_link_hash_common
)
3297 switch (info
->common_skip_ar_symbols
)
3299 case bfd_link_common_skip_text
:
3300 skip
= (type
== (N_TEXT
| N_EXT
));
3302 case bfd_link_common_skip_data
:
3303 skip
= (type
== (N_DATA
| N_EXT
));
3306 case bfd_link_common_skip_all
:
3315 if (!(*info
->callbacks
3316 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3322 if (type
== (N_UNDF
| N_EXT
))
3326 value
= GET_WORD (abfd
, p
->e_value
);
3329 /* This symbol is common in the object from the archive
3331 if (h
->type
== bfd_link_hash_undefined
)
3336 symbfd
= h
->u
.undef
.abfd
;
3339 /* This symbol was created as undefined from
3340 outside BFD. We assume that we should link
3341 in the object file. This is done for the -u
3342 option in the linker. */
3343 if (!(*info
->callbacks
3344 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3349 /* Turn the current link symbol into a common
3350 symbol. It is already on the undefs list. */
3351 h
->type
= bfd_link_hash_common
;
3352 h
->u
.c
.p
= (struct bfd_link_hash_common_entry
*)
3353 bfd_hash_allocate (&info
->hash
->table
,
3354 sizeof (struct bfd_link_hash_common_entry
));
3355 if (h
->u
.c
.p
== NULL
)
3358 h
->u
.c
.size
= value
;
3360 /* FIXME: This isn't quite right. The maximum
3361 alignment of a common symbol should be set by the
3362 architecture of the output file, not of the input
3364 power
= bfd_log2 (value
);
3365 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3366 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3367 h
->u
.c
.p
->alignment_power
= power
;
3369 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3374 /* Adjust the size of the common symbol if
3376 if (value
> h
->u
.c
.size
)
3377 h
->u
.c
.size
= value
;
3387 /* This symbol is weak but defined. We must pull it in if
3388 the current link symbol is undefined, but we don't want
3389 it if the current link symbol is common. */
3390 if (h
->type
== bfd_link_hash_undefined
)
3392 if (!(*info
->callbacks
3393 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3401 /* We do not need this object file. */
3404 /* Check a single archive element to see if we need to include it in
3405 the link. *PNEEDED is set according to whether this element is
3406 needed in the link or not. This is called from
3407 _bfd_generic_link_add_archive_symbols. */
3410 aout_link_check_archive_element (bfd
*abfd
,
3411 struct bfd_link_info
*info
,
3412 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3413 const char *name ATTRIBUTE_UNUSED
,
3414 bfd_boolean
*pneeded
)
3419 if (!aout_get_external_symbols (abfd
))
3423 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
3429 /* Potentially, the add_archive_element hook may have set a
3430 substitute BFD for us. */
3433 if (!info
->keep_memory
3434 && !aout_link_free_symbols (oldbfd
))
3436 if (!aout_get_external_symbols (abfd
))
3439 if (!aout_link_add_symbols (abfd
, info
))
3443 if (!info
->keep_memory
|| !needed
)
3445 if (!aout_link_free_symbols (abfd
))
3452 /* Given an a.out BFD, add symbols to the global hash table as
3456 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
3458 switch (bfd_get_format (abfd
))
3461 return aout_link_add_object_symbols (abfd
, info
);
3463 return _bfd_generic_link_add_archive_symbols
3464 (abfd
, info
, aout_link_check_archive_element
);
3466 bfd_set_error (bfd_error_wrong_format
);
3471 /* A hash table used for header files with N_BINCL entries. */
3473 struct aout_link_includes_table
3475 struct bfd_hash_table root
;
3478 /* A linked list of totals that we have found for a particular header
3481 struct aout_link_includes_totals
3483 struct aout_link_includes_totals
*next
;
3487 /* An entry in the header file hash table. */
3489 struct aout_link_includes_entry
3491 struct bfd_hash_entry root
;
3492 /* List of totals we have found for this file. */
3493 struct aout_link_includes_totals
*totals
;
3496 /* Look up an entry in an the header file hash table. */
3498 #define aout_link_includes_lookup(table, string, create, copy) \
3499 ((struct aout_link_includes_entry *) \
3500 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3502 /* During the final link step we need to pass around a bunch of
3503 information, so we do it in an instance of this structure. */
3505 struct aout_final_link_info
3507 /* General link information. */
3508 struct bfd_link_info
*info
;
3511 /* Reloc file positions. */
3512 file_ptr treloff
, dreloff
;
3513 /* File position of symbols. */
3516 struct bfd_strtab_hash
*strtab
;
3517 /* Header file hash table. */
3518 struct aout_link_includes_table includes
;
3519 /* A buffer large enough to hold the contents of any section. */
3521 /* A buffer large enough to hold the relocs of any section. */
3523 /* A buffer large enough to hold the symbol map of any input BFD. */
3525 /* A buffer large enough to hold output symbols of any input BFD. */
3526 struct external_nlist
*output_syms
;
3529 /* The function to create a new entry in the header file hash table. */
3531 static struct bfd_hash_entry
*
3532 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3533 struct bfd_hash_table
*table
,
3536 struct aout_link_includes_entry
*ret
=
3537 (struct aout_link_includes_entry
*) entry
;
3539 /* Allocate the structure if it has not already been allocated by a
3542 ret
= (struct aout_link_includes_entry
*)
3543 bfd_hash_allocate (table
, sizeof (* ret
));
3547 /* Call the allocation method of the superclass. */
3548 ret
= ((struct aout_link_includes_entry
*)
3549 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3552 /* Set local fields. */
3556 return (struct bfd_hash_entry
*) ret
;
3559 /* Write out a symbol that was not associated with an a.out input
3563 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3565 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3566 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3570 struct external_nlist outsym
;
3574 if (h
->root
.type
== bfd_link_hash_warning
)
3576 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3577 if (h
->root
.type
== bfd_link_hash_new
)
3581 output_bfd
= flaginfo
->output_bfd
;
3583 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3585 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3586 (output_bfd
, flaginfo
->info
, h
)))
3588 /* FIXME: No way to handle errors. */
3598 /* An indx of -2 means the symbol must be written. */
3600 && (flaginfo
->info
->strip
== strip_all
3601 || (flaginfo
->info
->strip
== strip_some
3602 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3603 FALSE
, FALSE
) == NULL
)))
3606 switch (h
->root
.type
)
3609 case bfd_link_hash_warning
:
3611 /* Avoid variable not initialized warnings. */
3613 case bfd_link_hash_new
:
3614 /* This can happen for set symbols when sets are not being
3617 case bfd_link_hash_undefined
:
3618 type
= N_UNDF
| N_EXT
;
3621 case bfd_link_hash_defined
:
3622 case bfd_link_hash_defweak
:
3626 sec
= h
->root
.u
.def
.section
->output_section
;
3627 BFD_ASSERT (bfd_is_abs_section (sec
)
3628 || sec
->owner
== output_bfd
);
3629 if (sec
== obj_textsec (output_bfd
))
3630 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3631 else if (sec
== obj_datasec (output_bfd
))
3632 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3633 else if (sec
== obj_bsssec (output_bfd
))
3634 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3636 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3638 val
= (h
->root
.u
.def
.value
3640 + h
->root
.u
.def
.section
->output_offset
);
3643 case bfd_link_hash_common
:
3644 type
= N_UNDF
| N_EXT
;
3645 val
= h
->root
.u
.c
.size
;
3647 case bfd_link_hash_undefweak
:
3651 case bfd_link_hash_indirect
:
3652 /* We ignore these symbols, since the indirected symbol is
3653 already in the hash table. */
3657 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3658 H_PUT_8 (output_bfd
, 0, outsym
.e_other
);
3659 H_PUT_16 (output_bfd
, 0, outsym
.e_desc
);
3660 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3662 if (indx
== - (bfd_size_type
) 1)
3663 /* FIXME: No way to handle errors. */
3666 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3667 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3669 amt
= EXTERNAL_NLIST_SIZE
;
3670 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3671 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3672 /* FIXME: No way to handle errors. */
3675 flaginfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
3676 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3677 ++obj_aout_external_sym_count (output_bfd
);
3682 /* Handle a link order which is supposed to generate a reloc. */
3685 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3687 struct bfd_link_order
*p
)
3689 struct bfd_link_order_reloc
*pr
;
3692 reloc_howto_type
*howto
;
3693 file_ptr
*reloff_ptr
= NULL
;
3694 struct reloc_std_external srel
;
3695 struct reloc_ext_external erel
;
3701 if (p
->type
== bfd_section_reloc_link_order
)
3704 if (bfd_is_abs_section (pr
->u
.section
))
3705 r_index
= N_ABS
| N_EXT
;
3708 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3709 r_index
= pr
->u
.section
->target_index
;
3714 struct aout_link_hash_entry
*h
;
3716 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3718 h
= ((struct aout_link_hash_entry
*)
3719 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3720 pr
->u
.name
, FALSE
, FALSE
, TRUE
));
3726 /* We decided to strip this symbol, but it turns out that we
3727 can't. Note that we lose the other and desc information
3728 here. I don't think that will ever matter for a global
3732 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3738 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3739 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3744 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3747 bfd_set_error (bfd_error_bad_value
);
3751 if (o
== obj_textsec (flaginfo
->output_bfd
))
3752 reloff_ptr
= &flaginfo
->treloff
;
3753 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3754 reloff_ptr
= &flaginfo
->dreloff
;
3758 if (obj_reloc_entry_size (flaginfo
->output_bfd
) == RELOC_STD_SIZE
)
3761 MY_put_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3771 r_pcrel
= (int) howto
->pc_relative
;
3772 r_baserel
= (howto
->type
& 8) != 0;
3773 r_jmptable
= (howto
->type
& 16) != 0;
3774 r_relative
= (howto
->type
& 32) != 0;
3775 r_length
= howto
->size
;
3777 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3778 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3780 srel
.r_index
[0] = r_index
>> 16;
3781 srel
.r_index
[1] = r_index
>> 8;
3782 srel
.r_index
[2] = r_index
;
3784 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3785 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3786 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3787 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3788 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3789 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3793 srel
.r_index
[2] = r_index
>> 16;
3794 srel
.r_index
[1] = r_index
>> 8;
3795 srel
.r_index
[0] = r_index
;
3797 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3798 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3799 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3800 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3801 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3802 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3806 rel_ptr
= (void *) &srel
;
3808 /* We have to write the addend into the object file, since
3809 standard a.out relocs are in place. It would be more
3810 reliable if we had the current contents of the file here,
3811 rather than assuming zeroes, but we can't read the file since
3812 it was opened using bfd_openw. */
3813 if (pr
->addend
!= 0)
3816 bfd_reloc_status_type r
;
3820 size
= bfd_get_reloc_size (howto
);
3821 buf
= (bfd_byte
*) bfd_zmalloc (size
);
3822 if (buf
== NULL
&& size
!= 0)
3824 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3825 (bfd_vma
) pr
->addend
, buf
);
3831 case bfd_reloc_outofrange
:
3833 case bfd_reloc_overflow
:
3834 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3835 (flaginfo
->info
, NULL
,
3836 (p
->type
== bfd_section_reloc_link_order
3837 ? bfd_section_name (flaginfo
->output_bfd
,
3840 howto
->name
, pr
->addend
, NULL
, NULL
, (bfd_vma
) 0);
3843 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
, (void *) buf
,
3844 (file_ptr
) p
->offset
, size
);
3852 #ifdef MY_put_ext_reloc
3853 MY_put_ext_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
,
3854 howto
, &erel
, pr
->addend
);
3856 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, erel
.r_address
);
3858 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3860 erel
.r_index
[0] = r_index
>> 16;
3861 erel
.r_index
[1] = r_index
>> 8;
3862 erel
.r_index
[2] = r_index
;
3864 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
3865 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
3869 erel
.r_index
[2] = r_index
>> 16;
3870 erel
.r_index
[1] = r_index
>> 8;
3871 erel
.r_index
[0] = r_index
;
3873 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
3874 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
3877 PUT_WORD (flaginfo
->output_bfd
, (bfd_vma
) pr
->addend
, erel
.r_addend
);
3878 #endif /* MY_put_ext_reloc */
3880 rel_ptr
= (void *) &erel
;
3883 amt
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3884 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3885 || bfd_bwrite (rel_ptr
, amt
, flaginfo
->output_bfd
) != amt
)
3888 *reloff_ptr
+= obj_reloc_entry_size (flaginfo
->output_bfd
);
3890 /* Assert that the relocs have not run into the symbols, and that n
3891 the text relocs have not run into the data relocs. */
3892 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3893 && (reloff_ptr
!= &flaginfo
->treloff
3895 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3900 /* Get the section corresponding to a reloc index. */
3902 static INLINE asection
*
3903 aout_reloc_index_to_section (bfd
*abfd
, int indx
)
3905 switch (indx
& N_TYPE
)
3907 case N_TEXT
: return obj_textsec (abfd
);
3908 case N_DATA
: return obj_datasec (abfd
);
3909 case N_BSS
: return obj_bsssec (abfd
);
3911 case N_UNDF
: return bfd_abs_section_ptr
;
3917 /* Relocate an a.out section using standard a.out relocs. */
3920 aout_link_input_section_std (struct aout_final_link_info
*flaginfo
,
3922 asection
*input_section
,
3923 struct reloc_std_external
*relocs
,
3924 bfd_size_type rel_size
,
3927 bfd_boolean (*check_dynamic_reloc
)
3928 (struct bfd_link_info
*, bfd
*, asection
*,
3929 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
3932 bfd_boolean relocatable
;
3933 struct external_nlist
*syms
;
3935 struct aout_link_hash_entry
**sym_hashes
;
3937 bfd_size_type reloc_count
;
3938 struct reloc_std_external
*rel
;
3939 struct reloc_std_external
*rel_end
;
3941 output_bfd
= flaginfo
->output_bfd
;
3942 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
3944 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
3945 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
3946 == output_bfd
->xvec
->header_byteorder
);
3948 relocatable
= bfd_link_relocatable (flaginfo
->info
);
3949 syms
= obj_aout_external_syms (input_bfd
);
3950 strings
= obj_aout_external_strings (input_bfd
);
3951 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
3952 symbol_map
= flaginfo
->symbol_map
;
3954 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
3956 rel_end
= rel
+ reloc_count
;
3957 for (; rel
< rel_end
; rel
++)
3964 reloc_howto_type
*howto
;
3965 struct aout_link_hash_entry
*h
= NULL
;
3967 bfd_reloc_status_type r
;
3969 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
3971 #ifdef MY_reloc_howto
3972 howto
= MY_reloc_howto (input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
3978 unsigned int howto_idx
;
3980 if (bfd_header_big_endian (input_bfd
))
3982 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
3983 | ((unsigned int) rel
->r_index
[1] << 8)
3985 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
3986 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
3987 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
3988 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
3989 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
3990 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
3991 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
3995 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
3996 | ((unsigned int) rel
->r_index
[1] << 8)
3998 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
3999 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4000 r_baserel
= (0 != (rel
->r_type
[0]
4001 & RELOC_STD_BITS_BASEREL_LITTLE
));
4002 r_jmptable
= (0 != (rel
->r_type
[0]
4003 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4004 r_relative
= (0 != (rel
->r_type
[0]
4005 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4006 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4007 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4010 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4011 + 16 * r_jmptable
+ 32 * r_relative
);
4012 if (howto_idx
< TABLE_SIZE (howto_table_std
))
4013 howto
= howto_table_std
+ howto_idx
;
4021 (*flaginfo
->info
->callbacks
->einfo
)
4022 (_("%P: %B: unexpected relocation type\n"), input_bfd
);
4023 bfd_set_error (bfd_error_bad_value
);
4029 /* We are generating a relocatable output file, and must
4030 modify the reloc accordingly. */
4033 /* If we know the symbol this relocation is against,
4034 convert it into a relocation against a section. This
4035 is what the native linker does. */
4036 h
= sym_hashes
[r_index
];
4038 && (h
->root
.type
== bfd_link_hash_defined
4039 || h
->root
.type
== bfd_link_hash_defweak
))
4041 asection
*output_section
;
4043 /* Change the r_extern value. */
4044 if (bfd_header_big_endian (output_bfd
))
4045 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4047 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4049 /* Compute a new r_index. */
4050 output_section
= h
->root
.u
.def
.section
->output_section
;
4051 if (output_section
== obj_textsec (output_bfd
))
4053 else if (output_section
== obj_datasec (output_bfd
))
4055 else if (output_section
== obj_bsssec (output_bfd
))
4060 /* Add the symbol value and the section VMA to the
4061 addend stored in the contents. */
4062 relocation
= (h
->root
.u
.def
.value
4063 + output_section
->vma
4064 + h
->root
.u
.def
.section
->output_offset
);
4068 /* We must change r_index according to the symbol
4070 r_index
= symbol_map
[r_index
];
4076 /* We decided to strip this symbol, but it
4077 turns out that we can't. Note that we
4078 lose the other and desc information here.
4079 I don't think that will ever matter for a
4085 if (!aout_link_write_other_symbol (&h
->root
.root
,
4095 name
= strings
+ GET_WORD (input_bfd
,
4096 syms
[r_index
].e_strx
);
4097 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4098 (flaginfo
->info
, name
,
4099 input_bfd
, input_section
, r_addr
);
4107 /* Write out the new r_index value. */
4108 if (bfd_header_big_endian (output_bfd
))
4110 rel
->r_index
[0] = r_index
>> 16;
4111 rel
->r_index
[1] = r_index
>> 8;
4112 rel
->r_index
[2] = r_index
;
4116 rel
->r_index
[2] = r_index
>> 16;
4117 rel
->r_index
[1] = r_index
>> 8;
4118 rel
->r_index
[0] = r_index
;
4125 /* This is a relocation against a section. We must
4126 adjust by the amount that the section moved. */
4127 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4128 relocation
= (section
->output_section
->vma
4129 + section
->output_offset
4133 /* Change the address of the relocation. */
4134 PUT_WORD (output_bfd
,
4135 r_addr
+ input_section
->output_offset
,
4138 /* Adjust a PC relative relocation by removing the reference
4139 to the original address in the section and including the
4140 reference to the new address. */
4142 relocation
-= (input_section
->output_section
->vma
4143 + input_section
->output_offset
4144 - input_section
->vma
);
4146 #ifdef MY_relocatable_reloc
4147 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4150 if (relocation
== 0)
4153 r
= MY_relocate_contents (howto
,
4154 input_bfd
, relocation
,
4161 /* We are generating an executable, and must do a full
4167 h
= sym_hashes
[r_index
];
4170 && (h
->root
.type
== bfd_link_hash_defined
4171 || h
->root
.type
== bfd_link_hash_defweak
))
4173 relocation
= (h
->root
.u
.def
.value
4174 + h
->root
.u
.def
.section
->output_section
->vma
4175 + h
->root
.u
.def
.section
->output_offset
);
4178 && h
->root
.type
== bfd_link_hash_undefweak
)
4190 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4191 relocation
= (section
->output_section
->vma
4192 + section
->output_offset
4195 relocation
+= input_section
->vma
;
4198 if (check_dynamic_reloc
!= NULL
)
4202 if (! ((*check_dynamic_reloc
)
4203 (flaginfo
->info
, input_bfd
, input_section
, h
,
4204 (void *) rel
, contents
, &skip
, &relocation
)))
4210 /* Now warn if a global symbol is undefined. We could not
4211 do this earlier, because check_dynamic_reloc might want
4212 to skip this reloc. */
4213 if (hundef
&& ! bfd_link_pic (flaginfo
->info
) && ! r_baserel
)
4218 name
= h
->root
.root
.string
;
4220 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4221 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4222 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4225 r
= MY_final_link_relocate (howto
,
4226 input_bfd
, input_section
,
4227 contents
, r_addr
, relocation
,
4231 if (r
!= bfd_reloc_ok
)
4236 case bfd_reloc_outofrange
:
4238 case bfd_reloc_overflow
:
4245 name
= strings
+ GET_WORD (input_bfd
,
4246 syms
[r_index
].e_strx
);
4251 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4252 name
= bfd_section_name (input_bfd
, s
);
4254 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4255 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4256 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
4266 /* Relocate an a.out section using extended a.out relocs. */
4269 aout_link_input_section_ext (struct aout_final_link_info
*flaginfo
,
4271 asection
*input_section
,
4272 struct reloc_ext_external
*relocs
,
4273 bfd_size_type rel_size
,
4276 bfd_boolean (*check_dynamic_reloc
)
4277 (struct bfd_link_info
*, bfd
*, asection
*,
4278 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4281 bfd_boolean relocatable
;
4282 struct external_nlist
*syms
;
4284 struct aout_link_hash_entry
**sym_hashes
;
4286 bfd_size_type reloc_count
;
4287 struct reloc_ext_external
*rel
;
4288 struct reloc_ext_external
*rel_end
;
4290 output_bfd
= flaginfo
->output_bfd
;
4291 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4293 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4294 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4295 == output_bfd
->xvec
->header_byteorder
);
4297 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4298 syms
= obj_aout_external_syms (input_bfd
);
4299 strings
= obj_aout_external_strings (input_bfd
);
4300 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4301 symbol_map
= flaginfo
->symbol_map
;
4303 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4305 rel_end
= rel
+ reloc_count
;
4306 for (; rel
< rel_end
; rel
++)
4311 unsigned int r_type
;
4313 struct aout_link_hash_entry
*h
= NULL
;
4314 asection
*r_section
= NULL
;
4317 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4319 if (bfd_header_big_endian (input_bfd
))
4321 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4322 | ((unsigned int) rel
->r_index
[1] << 8)
4324 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4325 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4326 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4330 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4331 | ((unsigned int) rel
->r_index
[1] << 8)
4333 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4334 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4335 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4338 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4340 if (r_type
>= TABLE_SIZE (howto_table_ext
))
4342 (*flaginfo
->info
->callbacks
->einfo
)
4343 (_("%P: %B: unexpected relocation type\n"), input_bfd
);
4344 bfd_set_error (bfd_error_bad_value
);
4350 /* We are generating a relocatable output file, and must
4351 modify the reloc accordingly. */
4353 || r_type
== (unsigned int) RELOC_BASE10
4354 || r_type
== (unsigned int) RELOC_BASE13
4355 || r_type
== (unsigned int) RELOC_BASE22
)
4357 /* If we know the symbol this relocation is against,
4358 convert it into a relocation against a section. This
4359 is what the native linker does. */
4360 if (r_type
== (unsigned int) RELOC_BASE10
4361 || r_type
== (unsigned int) RELOC_BASE13
4362 || r_type
== (unsigned int) RELOC_BASE22
)
4365 h
= sym_hashes
[r_index
];
4367 && (h
->root
.type
== bfd_link_hash_defined
4368 || h
->root
.type
== bfd_link_hash_defweak
))
4370 asection
*output_section
;
4372 /* Change the r_extern value. */
4373 if (bfd_header_big_endian (output_bfd
))
4374 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4376 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4378 /* Compute a new r_index. */
4379 output_section
= h
->root
.u
.def
.section
->output_section
;
4380 if (output_section
== obj_textsec (output_bfd
))
4382 else if (output_section
== obj_datasec (output_bfd
))
4384 else if (output_section
== obj_bsssec (output_bfd
))
4389 /* Add the symbol value and the section VMA to the
4391 relocation
= (h
->root
.u
.def
.value
4392 + output_section
->vma
4393 + h
->root
.u
.def
.section
->output_offset
);
4395 /* Now RELOCATION is the VMA of the final
4396 destination. If this is a PC relative reloc,
4397 then ADDEND is the negative of the source VMA.
4398 We want to set ADDEND to the difference between
4399 the destination VMA and the source VMA, which
4400 means we must adjust RELOCATION by the change in
4401 the source VMA. This is done below. */
4405 /* We must change r_index according to the symbol
4407 r_index
= symbol_map
[r_index
];
4413 /* We decided to strip this symbol, but it
4414 turns out that we can't. Note that we
4415 lose the other and desc information here.
4416 I don't think that will ever matter for a
4422 if (!aout_link_write_other_symbol (&h
->root
.root
,
4432 name
= strings
+ GET_WORD (input_bfd
,
4433 syms
[r_index
].e_strx
);
4434 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4435 (flaginfo
->info
, name
,
4436 input_bfd
, input_section
, r_addr
);
4443 /* If this is a PC relative reloc, then the addend
4444 is the negative of the source VMA. We must
4445 adjust it by the change in the source VMA. This
4449 /* Write out the new r_index value. */
4450 if (bfd_header_big_endian (output_bfd
))
4452 rel
->r_index
[0] = r_index
>> 16;
4453 rel
->r_index
[1] = r_index
>> 8;
4454 rel
->r_index
[2] = r_index
;
4458 rel
->r_index
[2] = r_index
>> 16;
4459 rel
->r_index
[1] = r_index
>> 8;
4460 rel
->r_index
[0] = r_index
;
4465 /* This is a relocation against a section. We must
4466 adjust by the amount that the section moved. */
4467 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4468 relocation
= (r_section
->output_section
->vma
4469 + r_section
->output_offset
4472 /* If this is a PC relative reloc, then the addend is
4473 the difference in VMA between the destination and the
4474 source. We have just adjusted for the change in VMA
4475 of the destination, so we must also adjust by the
4476 change in VMA of the source. This is done below. */
4479 /* As described above, we must always adjust a PC relative
4480 reloc by the change in VMA of the source. However, if
4481 pcrel_offset is set, then the addend does not include the
4482 location within the section, in which case we don't need
4483 to adjust anything. */
4484 if (howto_table_ext
[r_type
].pc_relative
4485 && ! howto_table_ext
[r_type
].pcrel_offset
)
4486 relocation
-= (input_section
->output_section
->vma
4487 + input_section
->output_offset
4488 - input_section
->vma
);
4490 /* Change the addend if necessary. */
4491 if (relocation
!= 0)
4492 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4494 /* Change the address of the relocation. */
4495 PUT_WORD (output_bfd
,
4496 r_addr
+ input_section
->output_offset
,
4502 bfd_reloc_status_type r
;
4504 /* We are generating an executable, and must do a full
4510 h
= sym_hashes
[r_index
];
4513 && (h
->root
.type
== bfd_link_hash_defined
4514 || h
->root
.type
== bfd_link_hash_defweak
))
4516 relocation
= (h
->root
.u
.def
.value
4517 + h
->root
.u
.def
.section
->output_section
->vma
4518 + h
->root
.u
.def
.section
->output_offset
);
4521 && h
->root
.type
== bfd_link_hash_undefweak
)
4529 else if (r_type
== (unsigned int) RELOC_BASE10
4530 || r_type
== (unsigned int) RELOC_BASE13
4531 || r_type
== (unsigned int) RELOC_BASE22
)
4533 struct external_nlist
*sym
;
4536 /* For base relative relocs, r_index is always an index
4537 into the symbol table, even if r_extern is 0. */
4538 sym
= syms
+ r_index
;
4539 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4540 if ((type
& N_TYPE
) == N_TEXT
4542 r_section
= obj_textsec (input_bfd
);
4543 else if ((type
& N_TYPE
) == N_DATA
4545 r_section
= obj_datasec (input_bfd
);
4546 else if ((type
& N_TYPE
) == N_BSS
4548 r_section
= obj_bsssec (input_bfd
);
4549 else if ((type
& N_TYPE
) == N_ABS
4551 r_section
= bfd_abs_section_ptr
;
4554 relocation
= (r_section
->output_section
->vma
4555 + r_section
->output_offset
4556 + (GET_WORD (input_bfd
, sym
->e_value
)
4561 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4563 /* If this is a PC relative reloc, then R_ADDEND is the
4564 difference between the two vmas, or
4565 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4567 old_dest_sec == section->vma
4569 old_src_sec == input_section->vma
4571 old_src_off == r_addr
4573 _bfd_final_link_relocate expects RELOCATION +
4574 R_ADDEND to be the VMA of the destination minus
4575 r_addr (the minus r_addr is because this relocation
4576 is not pcrel_offset, which is a bit confusing and
4577 should, perhaps, be changed), or
4580 new_dest_sec == output_section->vma + output_offset
4581 We arrange for this to happen by setting RELOCATION to
4582 new_dest_sec + old_src_sec - old_dest_sec
4584 If this is not a PC relative reloc, then R_ADDEND is
4585 simply the VMA of the destination, so we set
4586 RELOCATION to the change in the destination VMA, or
4587 new_dest_sec - old_dest_sec
4589 relocation
= (r_section
->output_section
->vma
4590 + r_section
->output_offset
4592 if (howto_table_ext
[r_type
].pc_relative
)
4593 relocation
+= input_section
->vma
;
4596 if (check_dynamic_reloc
!= NULL
)
4600 if (! ((*check_dynamic_reloc
)
4601 (flaginfo
->info
, input_bfd
, input_section
, h
,
4602 (void *) rel
, contents
, &skip
, &relocation
)))
4608 /* Now warn if a global symbol is undefined. We could not
4609 do this earlier, because check_dynamic_reloc might want
4610 to skip this reloc. */
4612 && ! bfd_link_pic (flaginfo
->info
)
4613 && r_type
!= (unsigned int) RELOC_BASE10
4614 && r_type
!= (unsigned int) RELOC_BASE13
4615 && r_type
!= (unsigned int) RELOC_BASE22
)
4620 name
= h
->root
.root
.string
;
4622 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4623 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4624 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4627 if (r_type
!= (unsigned int) RELOC_SPARC_REV32
)
4628 r
= MY_final_link_relocate (howto_table_ext
+ r_type
,
4629 input_bfd
, input_section
,
4630 contents
, r_addr
, relocation
,
4636 x
= bfd_get_32 (input_bfd
, contents
+ r_addr
);
4637 x
= x
+ relocation
+ r_addend
;
4638 bfd_putl32 (/*input_bfd,*/ x
, contents
+ r_addr
);
4642 if (r
!= bfd_reloc_ok
)
4647 case bfd_reloc_outofrange
:
4649 case bfd_reloc_overflow
:
4656 || r_type
== (unsigned int) RELOC_BASE10
4657 || r_type
== (unsigned int) RELOC_BASE13
4658 || r_type
== (unsigned int) RELOC_BASE22
)
4659 name
= strings
+ GET_WORD (input_bfd
,
4660 syms
[r_index
].e_strx
);
4665 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4666 name
= bfd_section_name (input_bfd
, s
);
4668 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4669 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
,
4670 howto_table_ext
[r_type
].name
,
4671 r_addend
, input_bfd
, input_section
, r_addr
);
4682 /* Link an a.out section into the output file. */
4685 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
4687 asection
*input_section
,
4688 file_ptr
*reloff_ptr
,
4689 bfd_size_type rel_size
)
4691 bfd_size_type input_size
;
4694 /* Get the section contents. */
4695 input_size
= input_section
->size
;
4696 if (! bfd_get_section_contents (input_bfd
, input_section
,
4697 (void *) flaginfo
->contents
,
4698 (file_ptr
) 0, input_size
))
4701 /* Read in the relocs if we haven't already done it. */
4702 if (aout_section_data (input_section
) != NULL
4703 && aout_section_data (input_section
)->relocs
!= NULL
)
4704 relocs
= aout_section_data (input_section
)->relocs
;
4707 relocs
= flaginfo
->relocs
;
4710 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4711 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
4716 /* Relocate the section contents. */
4717 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4719 if (! aout_link_input_section_std (flaginfo
, input_bfd
, input_section
,
4720 (struct reloc_std_external
*) relocs
,
4721 rel_size
, flaginfo
->contents
))
4726 if (! aout_link_input_section_ext (flaginfo
, input_bfd
, input_section
,
4727 (struct reloc_ext_external
*) relocs
,
4728 rel_size
, flaginfo
->contents
))
4732 /* Write out the section contents. */
4733 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
4734 input_section
->output_section
,
4735 (void *) flaginfo
->contents
,
4736 (file_ptr
) input_section
->output_offset
,
4740 /* If we are producing relocatable output, the relocs were
4741 modified, and we now write them out. */
4742 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
4744 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4746 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
4748 *reloff_ptr
+= rel_size
;
4750 /* Assert that the relocs have not run into the symbols, and
4751 that if these are the text relocs they have not run into the
4753 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
4754 && (reloff_ptr
!= &flaginfo
->treloff
4756 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
4762 /* Adjust and write out the symbols for an a.out file. Set the new
4763 symbol indices into a symbol_map. */
4766 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4769 bfd_size_type sym_count
;
4771 enum bfd_link_strip strip
;
4772 enum bfd_link_discard discard
;
4773 struct external_nlist
*outsym
;
4774 bfd_size_type strtab_index
;
4775 struct external_nlist
*sym
;
4776 struct external_nlist
*sym_end
;
4777 struct aout_link_hash_entry
**sym_hash
;
4780 bfd_boolean skip_next
;
4782 output_bfd
= flaginfo
->output_bfd
;
4783 sym_count
= obj_aout_external_sym_count (input_bfd
);
4784 strings
= obj_aout_external_strings (input_bfd
);
4785 strip
= flaginfo
->info
->strip
;
4786 discard
= flaginfo
->info
->discard
;
4787 outsym
= flaginfo
->output_syms
;
4789 /* First write out a symbol for this object file, unless we are
4790 discarding such symbols. */
4791 if (strip
!= strip_all
4792 && (strip
!= strip_some
4793 || bfd_hash_lookup (flaginfo
->info
->keep_hash
, input_bfd
->filename
,
4794 FALSE
, FALSE
) != NULL
)
4795 && discard
!= discard_all
)
4797 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4798 H_PUT_8 (output_bfd
, 0, outsym
->e_other
);
4799 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4800 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4801 input_bfd
->filename
, FALSE
);
4802 if (strtab_index
== (bfd_size_type
) -1)
4804 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4805 PUT_WORD (output_bfd
,
4806 (bfd_get_section_vma (output_bfd
,
4807 obj_textsec (input_bfd
)->output_section
)
4808 + obj_textsec (input_bfd
)->output_offset
),
4810 ++obj_aout_external_sym_count (output_bfd
);
4816 sym
= obj_aout_external_syms (input_bfd
);
4817 sym_end
= sym
+ sym_count
;
4818 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4819 symbol_map
= flaginfo
->symbol_map
;
4820 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4821 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4825 struct aout_link_hash_entry
*h
;
4831 /* We set *symbol_map to 0 above for all symbols. If it has
4832 already been set to -1 for this symbol, it means that we are
4833 discarding it because it appears in a duplicate header file.
4834 See the N_BINCL code below. */
4835 if (*symbol_map
== -1)
4838 /* Initialize *symbol_map to -1, which means that the symbol was
4839 not copied into the output file. We will change it later if
4840 we do copy the symbol over. */
4843 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4844 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4850 /* Pass this symbol through. It is the target of an
4851 indirect or warning symbol. */
4852 val
= GET_WORD (input_bfd
, sym
->e_value
);
4857 /* Skip this symbol, which is the target of an indirect
4858 symbol that we have changed to no longer be an indirect
4865 struct aout_link_hash_entry
*hresolve
;
4867 /* We have saved the hash table entry for this symbol, if
4868 there is one. Note that we could just look it up again
4869 in the hash table, provided we first check that it is an
4873 /* Use the name from the hash table, in case the symbol was
4876 && h
->root
.type
!= bfd_link_hash_warning
)
4877 name
= h
->root
.root
.string
;
4879 /* If this is an indirect or warning symbol, then change
4880 hresolve to the base symbol. We also change *sym_hash so
4881 that the relocation routines relocate against the real
4884 if (h
!= (struct aout_link_hash_entry
*) NULL
4885 && (h
->root
.type
== bfd_link_hash_indirect
4886 || h
->root
.type
== bfd_link_hash_warning
))
4888 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4889 while (hresolve
->root
.type
== bfd_link_hash_indirect
4890 || hresolve
->root
.type
== bfd_link_hash_warning
)
4891 hresolve
= ((struct aout_link_hash_entry
*)
4892 hresolve
->root
.u
.i
.link
);
4893 *sym_hash
= hresolve
;
4896 /* If the symbol has already been written out, skip it. */
4900 if ((type
& N_TYPE
) == N_INDR
4901 || type
== N_WARNING
)
4903 *symbol_map
= h
->indx
;
4907 /* See if we are stripping this symbol. */
4913 case strip_debugger
:
4914 if ((type
& N_STAB
) != 0)
4918 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
4933 /* Get the value of the symbol. */
4934 if ((type
& N_TYPE
) == N_TEXT
4936 symsec
= obj_textsec (input_bfd
);
4937 else if ((type
& N_TYPE
) == N_DATA
4939 symsec
= obj_datasec (input_bfd
);
4940 else if ((type
& N_TYPE
) == N_BSS
4942 symsec
= obj_bsssec (input_bfd
);
4943 else if ((type
& N_TYPE
) == N_ABS
4945 symsec
= bfd_abs_section_ptr
;
4946 else if (((type
& N_TYPE
) == N_INDR
4947 && (hresolve
== NULL
4948 || (hresolve
->root
.type
!= bfd_link_hash_defined
4949 && hresolve
->root
.type
!= bfd_link_hash_defweak
4950 && hresolve
->root
.type
!= bfd_link_hash_common
)))
4951 || type
== N_WARNING
)
4953 /* Pass the next symbol through unchanged. The
4954 condition above for indirect symbols is so that if
4955 the indirect symbol was defined, we output it with
4956 the correct definition so the debugger will
4959 val
= GET_WORD (input_bfd
, sym
->e_value
);
4962 else if ((type
& N_STAB
) != 0)
4964 val
= GET_WORD (input_bfd
, sym
->e_value
);
4969 /* If we get here with an indirect symbol, it means that
4970 we are outputting it with a real definition. In such
4971 a case we do not want to output the next symbol,
4972 which is the target of the indirection. */
4973 if ((type
& N_TYPE
) == N_INDR
)
4978 /* We need to get the value from the hash table. We use
4979 hresolve so that if we have defined an indirect
4980 symbol we output the final definition. */
4983 switch (type
& N_TYPE
)
4986 symsec
= obj_textsec (input_bfd
);
4989 symsec
= obj_datasec (input_bfd
);
4992 symsec
= obj_bsssec (input_bfd
);
4995 symsec
= bfd_abs_section_ptr
;
5002 else if (hresolve
->root
.type
== bfd_link_hash_defined
5003 || hresolve
->root
.type
== bfd_link_hash_defweak
)
5005 asection
*input_section
;
5006 asection
*output_section
;
5008 /* This case usually means a common symbol which was
5009 turned into a defined symbol. */
5010 input_section
= hresolve
->root
.u
.def
.section
;
5011 output_section
= input_section
->output_section
;
5012 BFD_ASSERT (bfd_is_abs_section (output_section
)
5013 || output_section
->owner
== output_bfd
);
5014 val
= (hresolve
->root
.u
.def
.value
5015 + bfd_get_section_vma (output_bfd
, output_section
)
5016 + input_section
->output_offset
);
5018 /* Get the correct type based on the section. If
5019 this is a constructed set, force it to be
5020 globally visible. */
5029 if (output_section
== obj_textsec (output_bfd
))
5030 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5033 else if (output_section
== obj_datasec (output_bfd
))
5034 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5037 else if (output_section
== obj_bsssec (output_bfd
))
5038 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5042 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5046 else if (hresolve
->root
.type
== bfd_link_hash_common
)
5047 val
= hresolve
->root
.u
.c
.size
;
5048 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
5057 val
= (symsec
->output_section
->vma
5058 + symsec
->output_offset
5059 + (GET_WORD (input_bfd
, sym
->e_value
)
5062 /* If this is a global symbol set the written flag, and if
5063 it is a local symbol see if we should discard it. */
5067 h
->indx
= obj_aout_external_sym_count (output_bfd
);
5069 else if ((type
& N_TYPE
) != N_SETT
5070 && (type
& N_TYPE
) != N_SETD
5071 && (type
& N_TYPE
) != N_SETB
5072 && (type
& N_TYPE
) != N_SETA
)
5077 case discard_sec_merge
:
5080 if ((type
& N_STAB
) == 0
5081 && bfd_is_local_label_name (input_bfd
, name
))
5095 /* An N_BINCL symbol indicates the start of the stabs
5096 entries for a header file. We need to scan ahead to the
5097 next N_EINCL symbol, ignoring nesting, adding up all the
5098 characters in the symbol names, not including the file
5099 numbers in types (the first number after an open
5101 if (type
== (int) N_BINCL
)
5103 struct external_nlist
*incl_sym
;
5105 struct aout_link_includes_entry
*incl_entry
;
5106 struct aout_link_includes_totals
*t
;
5110 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
5114 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5115 if (incl_type
== (int) N_EINCL
)
5121 else if (incl_type
== (int) N_BINCL
)
5127 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
5128 for (; *s
!= '\0'; s
++)
5133 /* Skip the file number. */
5135 while (ISDIGIT (*s
))
5143 /* If we have already included a header file with the
5144 same value, then replace this one with an N_EXCL
5146 copy
= (bfd_boolean
) (! flaginfo
->info
->keep_memory
);
5147 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
5149 if (incl_entry
== NULL
)
5151 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
5152 if (t
->total
== val
)
5156 /* This is the first time we have seen this header
5157 file with this set of stabs strings. */
5158 t
= (struct aout_link_includes_totals
*)
5159 bfd_hash_allocate (&flaginfo
->includes
.root
,
5164 t
->next
= incl_entry
->totals
;
5165 incl_entry
->totals
= t
;
5171 /* This is a duplicate header file. We must change
5172 it to be an N_EXCL entry, and mark all the
5173 included symbols to prevent outputting them. */
5174 type
= (int) N_EXCL
;
5177 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
5179 incl_sym
++, incl_map
++)
5183 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5184 if (incl_type
== (int) N_EINCL
)
5193 else if (incl_type
== (int) N_BINCL
)
5202 /* Copy this symbol into the list of symbols we are going to
5204 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
5205 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_other
), outsym
->e_other
);
5206 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
5208 if (! flaginfo
->info
->keep_memory
)
5210 /* name points into a string table which we are going to
5211 free. If there is a hash table entry, use that string.
5212 Otherwise, copy name into memory. */
5214 name
= h
->root
.root
.string
;
5218 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
5220 if (strtab_index
== (bfd_size_type
) -1)
5222 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
5223 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
5224 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
5225 ++obj_aout_external_sym_count (output_bfd
);
5229 /* Write out the output symbols we have just constructed. */
5230 if (outsym
> flaginfo
->output_syms
)
5232 bfd_size_type outsym_size
;
5234 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
5236 outsym_size
= outsym
- flaginfo
->output_syms
;
5237 outsym_size
*= EXTERNAL_NLIST_SIZE
;
5238 if (bfd_bwrite ((void *) flaginfo
->output_syms
, outsym_size
, output_bfd
)
5241 flaginfo
->symoff
+= outsym_size
;
5247 /* Link an a.out input BFD into the output file. */
5250 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
5252 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
5254 /* If this is a dynamic object, it may need special handling. */
5255 if ((input_bfd
->flags
& DYNAMIC
) != 0
5256 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
5257 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
5258 (flaginfo
->info
, input_bfd
));
5260 /* Get the symbols. We probably have them already, unless
5261 flaginfo->info->keep_memory is FALSE. */
5262 if (! aout_get_external_symbols (input_bfd
))
5265 /* Write out the symbols and get a map of the new indices. The map
5266 is placed into flaginfo->symbol_map. */
5267 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
5270 /* Relocate and write out the sections. These functions use the
5271 symbol map created by aout_link_write_symbols. The linker_mark
5272 field will be set if these sections are to be included in the
5273 link, which will normally be the case. */
5274 if (obj_textsec (input_bfd
)->linker_mark
)
5276 if (! aout_link_input_section (flaginfo
, input_bfd
,
5277 obj_textsec (input_bfd
),
5279 exec_hdr (input_bfd
)->a_trsize
))
5282 if (obj_datasec (input_bfd
)->linker_mark
)
5284 if (! aout_link_input_section (flaginfo
, input_bfd
,
5285 obj_datasec (input_bfd
),
5287 exec_hdr (input_bfd
)->a_drsize
))
5291 /* If we are not keeping memory, we don't need the symbols any
5292 longer. We still need them if we are keeping memory, because the
5293 strings in the hash table point into them. */
5294 if (! flaginfo
->info
->keep_memory
)
5296 if (! aout_link_free_symbols (input_bfd
))
5303 /* Do the final link step. This is called on the output BFD. The
5304 INFO structure should point to a list of BFDs linked through the
5305 link.next field which can be used to find each BFD which takes part
5306 in the output. Also, each section in ABFD should point to a list
5307 of bfd_link_order structures which list all the input sections for
5308 the output section. */
5311 NAME (aout
, final_link
) (bfd
*abfd
,
5312 struct bfd_link_info
*info
,
5313 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
5315 struct aout_final_link_info aout_info
;
5316 bfd_boolean includes_hash_initialized
= FALSE
;
5318 bfd_size_type trsize
, drsize
;
5319 bfd_size_type max_contents_size
;
5320 bfd_size_type max_relocs_size
;
5321 bfd_size_type max_sym_count
;
5322 struct bfd_link_order
*p
;
5324 bfd_boolean have_link_order_relocs
;
5326 if (bfd_link_pic (info
))
5327 abfd
->flags
|= DYNAMIC
;
5329 aout_info
.info
= info
;
5330 aout_info
.output_bfd
= abfd
;
5331 aout_info
.contents
= NULL
;
5332 aout_info
.relocs
= NULL
;
5333 aout_info
.symbol_map
= NULL
;
5334 aout_info
.output_syms
= NULL
;
5336 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
5337 aout_link_includes_newfunc
,
5338 sizeof (struct aout_link_includes_entry
),
5341 includes_hash_initialized
= TRUE
;
5343 /* Figure out the largest section size. Also, if generating
5344 relocatable output, count the relocs. */
5347 max_contents_size
= 0;
5348 max_relocs_size
= 0;
5350 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5354 if (bfd_link_relocatable (info
))
5356 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5358 trsize
+= exec_hdr (sub
)->a_trsize
;
5359 drsize
+= exec_hdr (sub
)->a_drsize
;
5363 /* FIXME: We need to identify the .text and .data sections
5364 and call get_reloc_upper_bound and canonicalize_reloc to
5365 work out the number of relocs needed, and then multiply
5366 by the reloc size. */
5367 (*_bfd_error_handler
)
5368 (_("%s: relocatable link from %s to %s not supported"),
5369 bfd_get_filename (abfd
),
5370 sub
->xvec
->name
, abfd
->xvec
->name
);
5371 bfd_set_error (bfd_error_invalid_operation
);
5376 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5378 sz
= obj_textsec (sub
)->size
;
5379 if (sz
> max_contents_size
)
5380 max_contents_size
= sz
;
5381 sz
= obj_datasec (sub
)->size
;
5382 if (sz
> max_contents_size
)
5383 max_contents_size
= sz
;
5385 sz
= exec_hdr (sub
)->a_trsize
;
5386 if (sz
> max_relocs_size
)
5387 max_relocs_size
= sz
;
5388 sz
= exec_hdr (sub
)->a_drsize
;
5389 if (sz
> max_relocs_size
)
5390 max_relocs_size
= sz
;
5392 sz
= obj_aout_external_sym_count (sub
);
5393 if (sz
> max_sym_count
)
5398 if (bfd_link_relocatable (info
))
5400 if (obj_textsec (abfd
) != NULL
)
5401 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
5402 ->map_head
.link_order
)
5403 * obj_reloc_entry_size (abfd
));
5404 if (obj_datasec (abfd
) != NULL
)
5405 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
5406 ->map_head
.link_order
)
5407 * obj_reloc_entry_size (abfd
));
5410 exec_hdr (abfd
)->a_trsize
= trsize
;
5411 exec_hdr (abfd
)->a_drsize
= drsize
;
5413 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
5415 /* Adjust the section sizes and vmas according to the magic number.
5416 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5417 filepos for each section. */
5418 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
5421 /* The relocation and symbol file positions differ among a.out
5422 targets. We are passed a callback routine from the backend
5423 specific code to handle this.
5424 FIXME: At this point we do not know how much space the symbol
5425 table will require. This will not work for any (nonstandard)
5426 a.out target that needs to know the symbol table size before it
5427 can compute the relocation file positions. This may or may not
5428 be the case for the hp300hpux target, for example. */
5429 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
5431 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
5432 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
5433 obj_sym_filepos (abfd
) = aout_info
.symoff
;
5435 /* We keep a count of the symbols as we output them. */
5436 obj_aout_external_sym_count (abfd
) = 0;
5438 /* We accumulate the string table as we write out the symbols. */
5439 aout_info
.strtab
= _bfd_stringtab_init ();
5440 if (aout_info
.strtab
== NULL
)
5443 /* Allocate buffers to hold section contents and relocs. */
5444 aout_info
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5445 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
5446 aout_info
.symbol_map
= (int *) bfd_malloc (max_sym_count
* sizeof (int));
5447 aout_info
.output_syms
= (struct external_nlist
*)
5448 bfd_malloc ((max_sym_count
+ 1) * sizeof (struct external_nlist
));
5449 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
5450 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
5451 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
5452 || aout_info
.output_syms
== NULL
)
5455 /* If we have a symbol named __DYNAMIC, force it out now. This is
5456 required by SunOS. Doing this here rather than in sunos.c is a
5457 hack, but it's easier than exporting everything which would be
5460 struct aout_link_hash_entry
*h
;
5462 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
5463 FALSE
, FALSE
, FALSE
);
5465 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
5468 /* The most time efficient way to do the link would be to read all
5469 the input object files into memory and then sort out the
5470 information into the output file. Unfortunately, that will
5471 probably use too much memory. Another method would be to step
5472 through everything that composes the text section and write it
5473 out, and then everything that composes the data section and write
5474 it out, and then write out the relocs, and then write out the
5475 symbols. Unfortunately, that requires reading stuff from each
5476 input file several times, and we will not be able to keep all the
5477 input files open simultaneously, and reopening them will be slow.
5479 What we do is basically process one input file at a time. We do
5480 everything we need to do with an input file once--copy over the
5481 section contents, handle the relocation information, and write
5482 out the symbols--and then we throw away the information we read
5483 from it. This approach requires a lot of lseeks of the output
5484 file, which is unfortunate but still faster than reopening a lot
5487 We use the output_has_begun field of the input BFDs to see
5488 whether we have already handled it. */
5489 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5490 sub
->output_has_begun
= FALSE
;
5492 /* Mark all sections which are to be included in the link. This
5493 will normally be every section. We need to do this so that we
5494 can identify any sections which the linker has decided to not
5496 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5498 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5499 if (p
->type
== bfd_indirect_link_order
)
5500 p
->u
.indirect
.section
->linker_mark
= TRUE
;
5503 have_link_order_relocs
= FALSE
;
5504 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5506 for (p
= o
->map_head
.link_order
;
5510 if (p
->type
== bfd_indirect_link_order
5511 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
5512 == bfd_target_aout_flavour
))
5516 input_bfd
= p
->u
.indirect
.section
->owner
;
5517 if (! input_bfd
->output_has_begun
)
5519 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
5521 input_bfd
->output_has_begun
= TRUE
;
5524 else if (p
->type
== bfd_section_reloc_link_order
5525 || p
->type
== bfd_symbol_reloc_link_order
)
5527 /* These are handled below. */
5528 have_link_order_relocs
= TRUE
;
5532 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5538 /* Write out any symbols that we have not already written out. */
5539 bfd_hash_traverse (&info
->hash
->table
,
5540 aout_link_write_other_symbol
,
5543 /* Now handle any relocs we were asked to create by the linker.
5544 These did not come from any input file. We must do these after
5545 we have written out all the symbols, so that we know the symbol
5547 if (have_link_order_relocs
)
5549 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5551 for (p
= o
->map_head
.link_order
;
5555 if (p
->type
== bfd_section_reloc_link_order
5556 || p
->type
== bfd_symbol_reloc_link_order
)
5558 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
5565 if (aout_info
.contents
!= NULL
)
5567 free (aout_info
.contents
);
5568 aout_info
.contents
= NULL
;
5570 if (aout_info
.relocs
!= NULL
)
5572 free (aout_info
.relocs
);
5573 aout_info
.relocs
= NULL
;
5575 if (aout_info
.symbol_map
!= NULL
)
5577 free (aout_info
.symbol_map
);
5578 aout_info
.symbol_map
= NULL
;
5580 if (aout_info
.output_syms
!= NULL
)
5582 free (aout_info
.output_syms
);
5583 aout_info
.output_syms
= NULL
;
5585 if (includes_hash_initialized
)
5587 bfd_hash_table_free (&aout_info
.includes
.root
);
5588 includes_hash_initialized
= FALSE
;
5591 /* Finish up any dynamic linking we may be doing. */
5592 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
5594 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
5598 /* Update the header information. */
5599 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
5600 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
5601 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
5602 obj_textsec (abfd
)->reloc_count
=
5603 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
5604 obj_datasec (abfd
)->reloc_count
=
5605 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
5607 /* Write out the string table, unless there are no symbols. */
5608 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
5610 if (abfd
->symcount
> 0)
5612 if (!emit_stringtab (abfd
, aout_info
.strtab
))
5617 bfd_byte b
[BYTES_IN_WORD
];
5619 memset (b
, 0, BYTES_IN_WORD
);
5620 if (bfd_bwrite (b
, (bfd_size_type
) BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
5627 if (aout_info
.contents
!= NULL
)
5628 free (aout_info
.contents
);
5629 if (aout_info
.relocs
!= NULL
)
5630 free (aout_info
.relocs
);
5631 if (aout_info
.symbol_map
!= NULL
)
5632 free (aout_info
.symbol_map
);
5633 if (aout_info
.output_syms
!= NULL
)
5634 free (aout_info
.output_syms
);
5635 if (includes_hash_initialized
)
5636 bfd_hash_table_free (&aout_info
.includes
.root
);