1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright (C) 1990-2020 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, and
37 386 a.out files, to create a target jump vector for a specific
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 and @file{demo64.c} for a demonstration of a 64 bit a.out format.
44 The base file @file{aoutx.h} defines general mechanisms for
45 reading and writing records to and from disk and various
46 other methods which BFD requires. It is included by
47 @file{aout32.c} and @file{aout64.c} to form the names
48 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
50 As an example, this is what goes on to make the back end for a
51 sun4, from @file{aout32.c}:
53 | #define ARCH_SIZE 32
59 | aout_32_canonicalize_reloc
60 | aout_32_find_nearest_line
62 | aout_32_get_reloc_upper_bound
67 | #define TARGET_NAME "a.out-sunos-big"
68 | #define VECNAME sparc_aout_sunos_be_vec
71 requires all the names from @file{aout32.c}, and produces the jump vector
73 | sparc_aout_sunos_be_vec
75 The file @file{host-aout.c} is a special case. It is for a large set
76 of hosts that use ``more or less standard'' a.out files, and
77 for which cross-debugging is not interesting. It uses the
78 standard 32-bit a.out support routines, but determines the
79 file offsets and addresses of the text, data, and BSS
80 sections, the machine architecture and machine type, and the
81 entry point address, in a host-dependent manner. Once these
82 values have been determined, generic code is used to handle
85 When porting it to run on a new system, you must supply:
89 | HOST_MACHINE_ARCH (optional)
90 | HOST_MACHINE_MACHINE (optional)
91 | HOST_TEXT_START_ADDR
94 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
95 values, plus the structures and macros defined in @file{a.out.h} on
96 your host system, will produce a BFD target that will access
97 ordinary a.out files on your host. To configure a new machine
98 to use @file{host-aout.c}, specify:
100 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
101 | TDEPFILES= host-aout.o trad-core.o
103 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.ac}
105 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
106 configuration is selected. */
109 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
110 Doesn't matter what the setting of WP_TEXT is on output, but it'll
112 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
113 * Any BFD with both flags clear is OMAGIC.
114 (Just want to make these explicit, so the conditions tested in this
115 file make sense if you're more familiar with a.out than with BFD.) */
117 #define KEEPIT udata.i
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 address, a symbol index,
140 and a type field. The extended records also have a full
141 integer for an addend. */
143 #ifndef CTOR_TABLE_RELOC_HOWTO
144 #define CTOR_TABLE_RELOC_IDX 2
145 #define CTOR_TABLE_RELOC_HOWTO(BFD) \
146 ((obj_reloc_entry_size (BFD) == RELOC_EXT_SIZE \
147 ? howto_table_ext : howto_table_std) \
148 + CTOR_TABLE_RELOC_IDX)
151 #ifndef MY_swap_std_reloc_in
152 #define MY_swap_std_reloc_in NAME (aout, swap_std_reloc_in)
155 #ifndef MY_swap_ext_reloc_in
156 #define MY_swap_ext_reloc_in NAME (aout, swap_ext_reloc_in)
159 #ifndef MY_swap_std_reloc_out
160 #define MY_swap_std_reloc_out NAME (aout, swap_std_reloc_out)
163 #ifndef MY_swap_ext_reloc_out
164 #define MY_swap_ext_reloc_out NAME (aout, swap_ext_reloc_out)
167 #ifndef MY_final_link_relocate
168 #define MY_final_link_relocate _bfd_final_link_relocate
171 #ifndef MY_relocate_contents
172 #define MY_relocate_contents _bfd_relocate_contents
175 #define howto_table_ext NAME (aout, ext_howto_table)
176 #define howto_table_std NAME (aout, std_howto_table)
178 reloc_howto_type howto_table_ext
[] =
180 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
181 HOWTO (RELOC_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
, 0, "8", FALSE
, 0, 0x000000ff, FALSE
),
182 HOWTO (RELOC_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
, 0, "16", FALSE
, 0, 0x0000ffff, FALSE
),
183 HOWTO (RELOC_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "32", FALSE
, 0, 0xffffffff, FALSE
),
184 HOWTO (RELOC_DISP8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0, "DISP8", FALSE
, 0, 0x000000ff, FALSE
),
185 HOWTO (RELOC_DISP16
, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0, "DISP16", FALSE
, 0, 0x0000ffff, FALSE
),
186 HOWTO (RELOC_DISP32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0, "DISP32", FALSE
, 0, 0xffffffff, FALSE
),
187 HOWTO (RELOC_WDISP30
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "WDISP30", FALSE
, 0, 0x3fffffff, FALSE
),
188 HOWTO (RELOC_WDISP22
, 2, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "WDISP22", FALSE
, 0, 0x003fffff, FALSE
),
189 HOWTO (RELOC_HI22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "HI22", FALSE
, 0, 0x003fffff, FALSE
),
190 HOWTO (RELOC_22
, 0, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "22", FALSE
, 0, 0x003fffff, FALSE
),
191 HOWTO (RELOC_13
, 0, 2, 13, FALSE
, 0, complain_overflow_bitfield
, 0, "13", FALSE
, 0, 0x00001fff, FALSE
),
192 HOWTO (RELOC_LO10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "LO10", FALSE
, 0, 0x000003ff, FALSE
),
193 HOWTO (RELOC_SFA_BASE
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_BASE", FALSE
, 0, 0xffffffff, FALSE
),
194 HOWTO (RELOC_SFA_OFF13
,0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "SFA_OFF13", FALSE
, 0, 0xffffffff, FALSE
),
195 HOWTO (RELOC_BASE10
, 0, 2, 10, FALSE
, 0, complain_overflow_dont
, 0, "BASE10", FALSE
, 0, 0x000003ff, FALSE
),
196 HOWTO (RELOC_BASE13
, 0, 2, 13, FALSE
, 0, complain_overflow_signed
, 0, "BASE13", FALSE
, 0, 0x00001fff, FALSE
),
197 HOWTO (RELOC_BASE22
, 10, 2, 22, FALSE
, 0, complain_overflow_bitfield
, 0, "BASE22", FALSE
, 0, 0x003fffff, FALSE
),
198 HOWTO (RELOC_PC10
, 0, 2, 10, TRUE
, 0, complain_overflow_dont
, 0, "PC10", FALSE
, 0, 0x000003ff, TRUE
),
199 HOWTO (RELOC_PC22
, 10, 2, 22, TRUE
, 0, complain_overflow_signed
, 0, "PC22", FALSE
, 0, 0x003fffff, TRUE
),
200 HOWTO (RELOC_JMP_TBL
, 2, 2, 30, TRUE
, 0, complain_overflow_signed
, 0, "JMP_TBL", FALSE
, 0, 0x3fffffff, FALSE
),
201 HOWTO (RELOC_SEGOFF16
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "SEGOFF16", FALSE
, 0, 0x00000000, FALSE
),
202 HOWTO (RELOC_GLOB_DAT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "GLOB_DAT", FALSE
, 0, 0x00000000, FALSE
),
203 HOWTO (RELOC_JMP_SLOT
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "JMP_SLOT", FALSE
, 0, 0x00000000, FALSE
),
204 HOWTO (RELOC_RELATIVE
,0, 2, 0, FALSE
, 0, complain_overflow_bitfield
, 0, "RELATIVE", FALSE
, 0, 0x00000000, FALSE
),
205 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
206 HOWTO (0, 0, 3, 0, FALSE
, 0, complain_overflow_dont
, 0, "R_SPARC_NONE",FALSE
, 0, 0x00000000, TRUE
),
207 #define RELOC_SPARC_REV32 RELOC_WDISP19
208 HOWTO (RELOC_SPARC_REV32
, 0, 2, 32, FALSE
, 0, complain_overflow_dont
, 0,"R_SPARC_REV32",FALSE
, 0, 0xffffffff, FALSE
),
211 /* Convert standard reloc records to "arelent" format (incl byte swap). */
213 reloc_howto_type howto_table_std
[] =
215 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone. */
216 HOWTO ( 0, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,0,"8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
217 HOWTO ( 1, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
218 HOWTO ( 2, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
219 HOWTO ( 3, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,0,"64", TRUE
, 0xdeaddead,0xdeaddead, FALSE
),
220 HOWTO ( 4, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0,"DISP8", TRUE
, 0x000000ff,0x000000ff, FALSE
),
221 HOWTO ( 5, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0,"DISP16", TRUE
, 0x0000ffff,0x0000ffff, FALSE
),
222 HOWTO ( 6, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0,"DISP32", TRUE
, 0xffffffff,0xffffffff, FALSE
),
223 HOWTO ( 7, 0, 4, 64, TRUE
, 0, complain_overflow_signed
, 0,"DISP64", TRUE
, 0xfeedface,0xfeedface, FALSE
),
224 HOWTO ( 8, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"GOT_REL", FALSE
, 0,0x00000000, FALSE
),
225 HOWTO ( 9, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,0,"BASE16", FALSE
,0xffffffff,0xffffffff, FALSE
),
226 HOWTO (10, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,0,"BASE32", FALSE
,0xffffffff,0xffffffff, FALSE
),
232 HOWTO (16, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"JMP_TABLE", FALSE
, 0,0x00000000, FALSE
),
248 HOWTO (32, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"RELATIVE", FALSE
, 0,0x00000000, FALSE
),
256 HOWTO (40, 0, 2, 0, FALSE
, 0, complain_overflow_bitfield
,0,"BASEREL", FALSE
, 0,0x00000000, FALSE
),
259 #define TABLE_SIZE(TABLE) (sizeof (TABLE) / sizeof (TABLE[0]))
262 NAME (aout
, reloc_type_lookup
) (bfd
*abfd
, bfd_reloc_code_real_type code
)
264 #define EXT(i, j) case i: return & howto_table_ext [j]
265 #define STD(i, j) case i: return & howto_table_std [j]
266 int ext
= obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
;
268 if (code
== BFD_RELOC_CTOR
)
269 switch (bfd_arch_bits_per_address (abfd
))
282 EXT (BFD_RELOC_8
, 0);
283 EXT (BFD_RELOC_16
, 1);
284 EXT (BFD_RELOC_32
, 2);
285 EXT (BFD_RELOC_HI22
, 8);
286 EXT (BFD_RELOC_LO10
, 11);
287 EXT (BFD_RELOC_32_PCREL_S2
, 6);
288 EXT (BFD_RELOC_SPARC_WDISP22
, 7);
289 EXT (BFD_RELOC_SPARC13
, 10);
290 EXT (BFD_RELOC_SPARC_GOT10
, 14);
291 EXT (BFD_RELOC_SPARC_BASE13
, 15);
292 EXT (BFD_RELOC_SPARC_GOT13
, 15);
293 EXT (BFD_RELOC_SPARC_GOT22
, 16);
294 EXT (BFD_RELOC_SPARC_PC10
, 17);
295 EXT (BFD_RELOC_SPARC_PC22
, 18);
296 EXT (BFD_RELOC_SPARC_WPLT30
, 19);
297 EXT (BFD_RELOC_SPARC_REV32
, 26);
305 STD (BFD_RELOC_8
, 0);
306 STD (BFD_RELOC_16
, 1);
307 STD (BFD_RELOC_32
, 2);
308 STD (BFD_RELOC_8_PCREL
, 4);
309 STD (BFD_RELOC_16_PCREL
, 5);
310 STD (BFD_RELOC_32_PCREL
, 6);
311 STD (BFD_RELOC_16_BASEREL
, 9);
312 STD (BFD_RELOC_32_BASEREL
, 10);
319 NAME (aout
, reloc_name_lookup
) (bfd
*abfd
, const char *r_name
)
321 unsigned int i
, size
;
322 reloc_howto_type
*howto_table
;
324 if (obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
)
326 howto_table
= howto_table_ext
;
327 size
= sizeof (howto_table_ext
) / sizeof (howto_table_ext
[0]);
331 howto_table
= howto_table_std
;
332 size
= sizeof (howto_table_std
) / sizeof (howto_table_std
[0]);
335 for (i
= 0; i
< size
; i
++)
336 if (howto_table
[i
].name
!= NULL
337 && strcasecmp (howto_table
[i
].name
, r_name
) == 0)
338 return &howto_table
[i
];
345 Internal entry points
348 @file{aoutx.h} exports several routines for accessing the
349 contents of an a.out file, which are gathered and exported in
350 turn by various format specific files (eg sunos.c).
355 aout_@var{size}_swap_exec_header_in
358 void aout_@var{size}_swap_exec_header_in,
360 struct external_exec *bytes,
361 struct internal_exec *execp);
364 Swap the information in an executable header @var{raw_bytes} taken
365 from a raw byte stream memory image into the internal exec header
366 structure @var{execp}.
369 #ifndef NAME_swap_exec_header_in
371 NAME (aout
, swap_exec_header_in
) (bfd
*abfd
,
372 struct external_exec
*bytes
,
373 struct internal_exec
*execp
)
375 /* The internal_exec structure has some fields that are unused in this
376 configuration (IE for i960), so ensure that all such uninitialized
377 fields are zero'd out. There are places where two of these structs
378 are memcmp'd, and thus the contents do matter. */
379 memset ((void *) execp
, 0, sizeof (struct internal_exec
));
380 /* Now fill in fields in the execp, from the bytes in the raw data. */
381 execp
->a_info
= H_GET_32 (abfd
, bytes
->e_info
);
382 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
383 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
384 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
385 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
386 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
387 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
388 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
390 #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
395 aout_@var{size}_swap_exec_header_out
398 void aout_@var{size}_swap_exec_header_out
400 struct internal_exec *execp,
401 struct external_exec *raw_bytes);
404 Swap the information in an internal exec header structure
405 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
408 NAME (aout
, swap_exec_header_out
) (bfd
*abfd
,
409 struct internal_exec
*execp
,
410 struct external_exec
*bytes
)
412 /* Now fill in fields in the raw data, from the fields in the exec struct. */
413 H_PUT_32 (abfd
, execp
->a_info
, bytes
->e_info
);
414 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
415 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
416 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
417 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
418 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
419 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
420 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
423 /* Make all the section for an a.out file. */
426 NAME (aout
, make_sections
) (bfd
*abfd
)
428 if (obj_textsec (abfd
) == NULL
&& bfd_make_section (abfd
, ".text") == NULL
)
430 if (obj_datasec (abfd
) == NULL
&& bfd_make_section (abfd
, ".data") == NULL
)
432 if (obj_bsssec (abfd
) == NULL
&& bfd_make_section (abfd
, ".bss") == NULL
)
439 aout_@var{size}_some_aout_object_p
442 const bfd_target *aout_@var{size}_some_aout_object_p
444 struct internal_exec *execp,
445 const bfd_target *(*callback_to_real_object_p) (bfd *));
448 Some a.out variant thinks that the file open in @var{abfd}
449 checking is an a.out file. Do some more checking, and set up
450 for access if it really is. Call back to the calling
451 environment's "finish up" function just before returning, to
452 handle any last-minute setup.
456 NAME (aout
, some_aout_object_p
) (bfd
*abfd
,
457 struct internal_exec
*execp
,
458 bfd_cleanup (*callback_to_real_object_p
) (bfd
*))
460 struct aout_data_struct
*rawptr
, *oldrawptr
;
462 size_t amt
= sizeof (* rawptr
);
464 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
468 oldrawptr
= abfd
->tdata
.aout_data
;
469 abfd
->tdata
.aout_data
= rawptr
;
471 /* Copy the contents of the old tdata struct. */
472 if (oldrawptr
!= NULL
)
473 *abfd
->tdata
.aout_data
= *oldrawptr
;
475 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
476 /* Copy in the internal_exec struct. */
477 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
;
478 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
480 /* Set the file flags. */
481 abfd
->flags
= BFD_NO_FLAGS
;
482 if (execp
->a_drsize
|| execp
->a_trsize
)
483 abfd
->flags
|= HAS_RELOC
;
484 /* Setting of EXEC_P has been deferred to the bottom of this function. */
486 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
487 if (N_DYNAMIC (execp
))
488 abfd
->flags
|= DYNAMIC
;
490 if (N_MAGIC (execp
) == ZMAGIC
)
492 abfd
->flags
|= D_PAGED
| WP_TEXT
;
493 adata (abfd
).magic
= z_magic
;
495 else if (N_MAGIC (execp
) == QMAGIC
)
497 abfd
->flags
|= D_PAGED
| WP_TEXT
;
498 adata (abfd
).magic
= z_magic
;
499 adata (abfd
).subformat
= q_magic_format
;
501 else if (N_MAGIC (execp
) == NMAGIC
)
503 abfd
->flags
|= WP_TEXT
;
504 adata (abfd
).magic
= n_magic
;
506 else if (N_MAGIC (execp
) == OMAGIC
507 || N_MAGIC (execp
) == BMAGIC
)
508 adata (abfd
).magic
= o_magic
;
510 /* Should have been checked with N_BADMAG before this routine
514 abfd
->start_address
= execp
->a_entry
;
516 obj_aout_symbols (abfd
) = NULL
;
517 abfd
->symcount
= execp
->a_syms
/ sizeof (struct external_nlist
);
519 /* The default relocation entry size is that of traditional V7 Unix. */
520 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
522 /* The default symbol entry size is that of traditional Unix. */
523 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
526 bfd_init_window (&obj_aout_sym_window (abfd
));
527 bfd_init_window (&obj_aout_string_window (abfd
));
529 obj_aout_external_syms (abfd
) = NULL
;
530 obj_aout_external_strings (abfd
) = NULL
;
531 obj_aout_sym_hashes (abfd
) = NULL
;
533 if (! NAME (aout
, make_sections
) (abfd
))
536 obj_datasec (abfd
)->size
= execp
->a_data
;
537 obj_bsssec (abfd
)->size
= execp
->a_bss
;
539 obj_textsec (abfd
)->flags
=
540 (execp
->a_trsize
!= 0
541 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
542 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
543 obj_datasec (abfd
)->flags
=
544 (execp
->a_drsize
!= 0
545 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
546 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
547 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
549 #ifdef THIS_IS_ONLY_DOCUMENTATION
550 /* The common code can't fill in these things because they depend
551 on either the start address of the text segment, the rounding
552 up of virtual addresses between segments, or the starting file
553 position of the text segment -- all of which varies among different
554 versions of a.out. */
556 /* Call back to the format-dependent code to fill in the rest of the
557 fields and do any further cleanup. Things that should be filled
558 in by the callback: */
560 struct exec
*execp
= exec_hdr (abfd
);
562 obj_textsec (abfd
)->size
= N_TXTSIZE (execp
);
563 /* Data and bss are already filled in since they're so standard. */
565 /* The virtual memory addresses of the sections. */
566 obj_textsec (abfd
)->vma
= N_TXTADDR (execp
);
567 obj_datasec (abfd
)->vma
= N_DATADDR (execp
);
568 obj_bsssec (abfd
)->vma
= N_BSSADDR (execp
);
570 /* The file offsets of the sections. */
571 obj_textsec (abfd
)->filepos
= N_TXTOFF (execp
);
572 obj_datasec (abfd
)->filepos
= N_DATOFF (execp
);
574 /* The file offsets of the relocation info. */
575 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF (execp
);
576 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF (execp
);
578 /* The file offsets of the string table and symbol table. */
579 obj_str_filepos (abfd
) = N_STROFF (execp
);
580 obj_sym_filepos (abfd
) = N_SYMOFF (execp
);
582 /* Determine the architecture and machine type of the object file. */
583 switch (N_MACHTYPE (exec_hdr (abfd
)))
586 abfd
->obj_arch
= bfd_arch_obscure
;
590 adata (abfd
)->page_size
= TARGET_PAGE_SIZE
;
591 adata (abfd
)->segment_size
= SEGMENT_SIZE
;
592 adata (abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
594 return _bfd_no_cleanup
596 /* The architecture is encoded in various ways in various a.out variants,
597 or is not encoded at all in some of them. The relocation size depends
598 on the architecture and the a.out variant. Finally, the return value
599 is the bfd_target vector in use. If an error occurs, return zero and
600 set bfd_error to the appropriate error code.
602 Formats such as b.out, which have additional fields in the a.out
603 header, should cope with them in this callback as well. */
604 #endif /* DOCUMENTATION */
606 result
= (*callback_to_real_object_p
) (abfd
);
608 /* Now that the segment addresses have been worked out, take a better
609 guess at whether the file is executable. If the entry point
610 is within the text segment, assume it is. (This makes files
611 executable even if their entry point address is 0, as long as
612 their text starts at zero.).
614 This test had to be changed to deal with systems where the text segment
615 runs at a different location than the default. The problem is that the
616 entry address can appear to be outside the text segment, thus causing an
617 erroneous conclusion that the file isn't executable.
619 To fix this, we now accept any non-zero entry point as an indication of
620 executability. This will work most of the time, since only the linker
621 sets the entry point, and that is likely to be non-zero for most systems. */
623 if (execp
->a_entry
!= 0
624 || (execp
->a_entry
>= obj_textsec (abfd
)->vma
625 && execp
->a_entry
< (obj_textsec (abfd
)->vma
626 + obj_textsec (abfd
)->size
)
627 && execp
->a_trsize
== 0
628 && execp
->a_drsize
== 0))
629 abfd
->flags
|= EXEC_P
;
633 struct stat stat_buf
;
635 /* The original heuristic doesn't work in some important cases.
636 The a.out file has no information about the text start
637 address. For files (like kernels) linked to non-standard
638 addresses (ld -Ttext nnn) the entry point may not be between
639 the default text start (obj_textsec(abfd)->vma) and
640 (obj_textsec(abfd)->vma) + text size. This is not just a mach
641 issue. Many kernels are loaded at non standard addresses. */
642 if (abfd
->iostream
!= NULL
643 && (abfd
->flags
& BFD_IN_MEMORY
) == 0
644 && (fstat (fileno ((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
645 && ((stat_buf
.st_mode
& 0111) != 0))
646 abfd
->flags
|= EXEC_P
;
648 #endif /* STAT_FOR_EXEC */
654 bfd_release (abfd
, rawptr
);
655 abfd
->tdata
.aout_data
= oldrawptr
;
661 aout_@var{size}_mkobject
664 bfd_boolean aout_@var{size}_mkobject, (bfd *abfd);
667 Initialize BFD @var{abfd} for use with a.out files.
671 NAME (aout
, mkobject
) (bfd
*abfd
)
673 struct aout_data_struct
*rawptr
;
674 size_t amt
= sizeof (* rawptr
);
676 bfd_set_error (bfd_error_system_call
);
678 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, amt
);
682 abfd
->tdata
.aout_data
= rawptr
;
683 exec_hdr (abfd
) = &(rawptr
->e
);
685 obj_textsec (abfd
) = NULL
;
686 obj_datasec (abfd
) = NULL
;
687 obj_bsssec (abfd
) = NULL
;
694 aout_@var{size}_machine_type
697 enum machine_type aout_@var{size}_machine_type
698 (enum bfd_architecture arch,
699 unsigned long machine,
700 bfd_boolean *unknown);
703 Keep track of machine architecture and machine type for
704 a.out's. Return the <<machine_type>> for a particular
705 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
706 and machine can't be represented in a.out format.
708 If the architecture is understood, machine type 0 (default)
709 is always understood.
713 NAME (aout
, machine_type
) (enum bfd_architecture arch
,
714 unsigned long machine
,
715 bfd_boolean
*unknown
)
717 enum machine_type arch_flags
;
719 arch_flags
= M_UNKNOWN
;
726 || machine
== bfd_mach_sparc
727 || machine
== bfd_mach_sparc_sparclite
728 || machine
== bfd_mach_sparc_sparclite_le
729 || machine
== bfd_mach_sparc_v8plus
730 || machine
== bfd_mach_sparc_v8plusa
731 || machine
== bfd_mach_sparc_v8plusb
732 || machine
== bfd_mach_sparc_v8plusc
733 || machine
== bfd_mach_sparc_v8plusd
734 || machine
== bfd_mach_sparc_v8pluse
735 || machine
== bfd_mach_sparc_v8plusv
736 || machine
== bfd_mach_sparc_v8plusm
737 || machine
== bfd_mach_sparc_v8plusm8
738 || machine
== bfd_mach_sparc_v9
739 || machine
== bfd_mach_sparc_v9a
740 || machine
== bfd_mach_sparc_v9b
741 || machine
== bfd_mach_sparc_v9c
742 || machine
== bfd_mach_sparc_v9d
743 || machine
== bfd_mach_sparc_v9e
744 || machine
== bfd_mach_sparc_v9v
745 || machine
== bfd_mach_sparc_v9m
746 || machine
== bfd_mach_sparc_v9m8
)
747 arch_flags
= M_SPARC
;
748 else if (machine
== bfd_mach_sparc_sparclet
)
749 arch_flags
= M_SPARCLET
;
754 || machine
== bfd_mach_i386_i386
755 || machine
== bfd_mach_i386_i386_intel_syntax
)
768 case bfd_mach_mips3000
:
769 case bfd_mach_mips3900
:
770 arch_flags
= M_MIPS1
;
772 case bfd_mach_mips6000
:
773 arch_flags
= M_MIPS2
;
775 case bfd_mach_mips4000
:
776 case bfd_mach_mips4010
:
777 case bfd_mach_mips4100
:
778 case bfd_mach_mips4300
:
779 case bfd_mach_mips4400
:
780 case bfd_mach_mips4600
:
781 case bfd_mach_mips4650
:
782 case bfd_mach_mips8000
:
783 case bfd_mach_mips9000
:
784 case bfd_mach_mips10000
:
785 case bfd_mach_mips12000
:
786 case bfd_mach_mips14000
:
787 case bfd_mach_mips16000
:
788 case bfd_mach_mips16
:
789 case bfd_mach_mipsisa32
:
790 case bfd_mach_mipsisa32r2
:
791 case bfd_mach_mipsisa32r3
:
792 case bfd_mach_mipsisa32r5
:
793 case bfd_mach_mipsisa32r6
:
795 case bfd_mach_mipsisa64
:
796 case bfd_mach_mipsisa64r2
:
797 case bfd_mach_mipsisa64r3
:
798 case bfd_mach_mipsisa64r5
:
799 case bfd_mach_mipsisa64r6
:
800 case bfd_mach_mips_sb1
:
801 case bfd_mach_mips_xlr
:
802 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
803 arch_flags
= M_MIPS2
;
806 arch_flags
= M_UNKNOWN
;
814 case 0: arch_flags
= M_NS32532
; break;
815 case 32032: arch_flags
= M_NS32032
; break;
816 case 32532: arch_flags
= M_NS32532
; break;
817 default: arch_flags
= M_UNKNOWN
; break;
826 if (machine
== 0 || machine
== 255)
831 arch_flags
= M_UNKNOWN
;
834 if (arch_flags
!= M_UNKNOWN
)
842 aout_@var{size}_set_arch_mach
845 bfd_boolean aout_@var{size}_set_arch_mach,
847 enum bfd_architecture arch,
848 unsigned long machine);
851 Set the architecture and the machine of the BFD @var{abfd} to the
852 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
853 can support the architecture required.
857 NAME (aout
, set_arch_mach
) (bfd
*abfd
,
858 enum bfd_architecture arch
,
859 unsigned long machine
)
861 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
864 if (arch
!= bfd_arch_unknown
)
868 NAME (aout
, machine_type
) (arch
, machine
, &unknown
);
873 /* Determine the size of a relocation entry. */
878 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
881 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
885 return (*aout_backend_info (abfd
)->set_sizes
) (abfd
);
889 adjust_o_magic (bfd
*abfd
, struct internal_exec
*execp
)
891 file_ptr pos
= adata (abfd
).exec_bytes_size
;
894 asection
*text
= obj_textsec (abfd
);
895 asection
*data
= obj_datasec (abfd
);
896 asection
*bss
= obj_bsssec (abfd
);
900 if (!text
->user_set_vma
)
905 pos
+= execp
->a_text
;
906 vma
+= execp
->a_text
;
909 if (!data
->user_set_vma
)
917 execp
->a_text
+= pad
;
924 if (!bss
->user_set_vma
)
932 /* The VMA of the .bss section is set by the VMA of the
933 .data section plus the size of the .data section. We may
934 need to add padding bytes to make this true. */
935 pad
= bss
->vma
- vma
;
940 execp
->a_data
= data
->size
+ pad
;
942 execp
->a_bss
= bss
->size
;
944 N_SET_MAGIC (execp
, OMAGIC
);
948 adjust_z_magic (bfd
*abfd
, struct internal_exec
*execp
)
950 bfd_size_type data_pad
, text_pad
;
952 const struct aout_backend_data
*abdp
;
953 /* TRUE if text includes exec header. */
955 asection
*text
= obj_textsec (abfd
);
956 asection
*data
= obj_datasec (abfd
);
957 asection
*bss
= obj_bsssec (abfd
);
959 abdp
= aout_backend_info (abfd
);
963 && (abdp
->text_includes_header
964 || obj_aout_subformat (abfd
) == q_magic_format
));
965 text
->filepos
= (ztih
966 ? adata (abfd
).exec_bytes_size
967 : adata (abfd
).zmagic_disk_block_size
);
968 if (!text
->user_set_vma
)
970 /* ?? Do we really need to check for relocs here? */
971 text
->vma
= ((abfd
->flags
& HAS_RELOC
)
974 ? abdp
->default_text_vma
+ adata (abfd
).exec_bytes_size
975 : abdp
->default_text_vma
));
980 /* The .text section is being loaded at an unusual address. We
981 may need to pad it such that the .data section starts at a page
984 text_pad
= ((text
->filepos
- text
->vma
)
985 & (adata (abfd
).page_size
- 1));
987 text_pad
= (-text
->vma
988 & (adata (abfd
).page_size
- 1));
991 /* Find start of data. */
994 text_end
= text
->filepos
+ execp
->a_text
;
995 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
999 /* Note that if page_size == zmagic_disk_block_size, then
1000 filepos == page_size, and this case is the same as the ztih
1002 text_end
= execp
->a_text
;
1003 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
1004 text_end
+= text
->filepos
;
1006 execp
->a_text
+= text_pad
;
1009 if (!data
->user_set_vma
)
1012 vma
= text
->vma
+ execp
->a_text
;
1013 data
->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1015 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
1017 text_pad
= data
->vma
- (text
->vma
+ execp
->a_text
);
1018 /* Only pad the text section if the data
1019 section is going to be placed after it. */
1021 execp
->a_text
+= text_pad
;
1023 data
->filepos
= text
->filepos
+ execp
->a_text
;
1025 /* Fix up exec header while we're at it. */
1026 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
1027 execp
->a_text
+= adata (abfd
).exec_bytes_size
;
1028 if (obj_aout_subformat (abfd
) == q_magic_format
)
1029 N_SET_MAGIC (execp
, QMAGIC
);
1031 N_SET_MAGIC (execp
, ZMAGIC
);
1033 /* Spec says data section should be rounded up to page boundary. */
1034 execp
->a_data
= align_power (data
->size
, bss
->alignment_power
);
1035 execp
->a_data
= BFD_ALIGN (execp
->a_data
, adata (abfd
).page_size
);
1036 data_pad
= execp
->a_data
- data
->size
;
1039 if (!bss
->user_set_vma
)
1040 bss
->vma
= data
->vma
+ execp
->a_data
;
1041 /* If the BSS immediately follows the data section and extra space
1042 in the page is left after the data section, fudge data
1043 in the header so that the bss section looks smaller by that
1044 amount. We'll start the bss section there, and lie to the OS.
1045 (Note that a linker script, as well as the above assignment,
1046 could have explicitly set the BSS vma to immediately follow
1047 the data section.) */
1048 if (align_power (bss
->vma
, bss
->alignment_power
) == data
->vma
+ execp
->a_data
)
1049 execp
->a_bss
= data_pad
> bss
->size
? 0 : bss
->size
- data_pad
;
1051 execp
->a_bss
= bss
->size
;
1055 adjust_n_magic (bfd
*abfd
, struct internal_exec
*execp
)
1057 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1060 asection
*text
= obj_textsec (abfd
);
1061 asection
*data
= obj_datasec (abfd
);
1062 asection
*bss
= obj_bsssec (abfd
);
1065 text
->filepos
= pos
;
1066 if (!text
->user_set_vma
)
1070 pos
+= execp
->a_text
;
1071 vma
+= execp
->a_text
;
1074 data
->filepos
= pos
;
1075 if (!data
->user_set_vma
)
1076 data
->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1079 /* Since BSS follows data immediately, see if it needs alignment. */
1081 pad
= align_power (vma
, bss
->alignment_power
) - vma
;
1082 execp
->a_data
= data
->size
+ pad
;
1083 pos
+= execp
->a_data
;
1086 if (!bss
->user_set_vma
)
1091 /* Fix up exec header. */
1092 execp
->a_bss
= bss
->size
;
1093 N_SET_MAGIC (execp
, NMAGIC
);
1097 NAME (aout
, adjust_sizes_and_vmas
) (bfd
*abfd
)
1099 struct internal_exec
*execp
= exec_hdr (abfd
);
1101 if (! NAME (aout
, make_sections
) (abfd
))
1104 if (adata (abfd
).magic
!= undecided_magic
)
1107 execp
->a_text
= align_power (obj_textsec (abfd
)->size
,
1108 obj_textsec (abfd
)->alignment_power
);
1110 /* Rule (heuristic) for when to pad to a new page. Note that there
1111 are (at least) two ways demand-paged (ZMAGIC) files have been
1112 handled. Most Berkeley-based systems start the text segment at
1113 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1114 segment right after the exec header; the latter is counted in the
1115 text segment size, and is paged in by the kernel with the rest of
1118 /* This perhaps isn't the right way to do this, but made it simpler for me
1119 to understand enough to implement it. Better would probably be to go
1120 right from BFD flags to alignment/positioning characteristics. But the
1121 old code was sloppy enough about handling the flags, and had enough
1122 other magic, that it was a little hard for me to understand. I think
1123 I understand it better now, but I haven't time to do the cleanup this
1126 if (abfd
->flags
& D_PAGED
)
1127 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1128 adata (abfd
).magic
= z_magic
;
1129 else if (abfd
->flags
& WP_TEXT
)
1130 adata (abfd
).magic
= n_magic
;
1132 adata (abfd
).magic
= o_magic
;
1134 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1136 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1138 switch (adata (abfd
).magic
)
1140 case n_magic
: str
= "NMAGIC"; break;
1141 case o_magic
: str
= "OMAGIC"; break;
1142 case z_magic
: str
= "ZMAGIC"; break;
1147 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1148 obj_textsec (abfd
)->alignment_power
,
1149 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1150 obj_datasec (abfd
)->alignment_power
,
1151 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
,
1152 obj_bsssec (abfd
)->alignment_power
);
1156 switch (adata (abfd
).magic
)
1159 adjust_o_magic (abfd
, execp
);
1162 adjust_z_magic (abfd
, execp
);
1165 adjust_n_magic (abfd
, execp
);
1171 #ifdef BFD_AOUT_DEBUG
1172 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1173 obj_textsec (abfd
)->vma
, execp
->a_text
,
1174 obj_textsec (abfd
)->filepos
,
1175 obj_datasec (abfd
)->vma
, execp
->a_data
,
1176 obj_datasec (abfd
)->filepos
,
1177 obj_bsssec (abfd
)->vma
, execp
->a_bss
);
1185 aout_@var{size}_new_section_hook
1188 bfd_boolean aout_@var{size}_new_section_hook,
1193 Called by the BFD in response to a @code{bfd_make_section}
1197 NAME (aout
, new_section_hook
) (bfd
*abfd
, asection
*newsect
)
1199 /* Align to double at least. */
1200 newsect
->alignment_power
= bfd_get_arch_info (abfd
)->section_align_power
;
1202 if (bfd_get_format (abfd
) == bfd_object
)
1204 if (obj_textsec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".text"))
1206 obj_textsec (abfd
)= newsect
;
1207 newsect
->target_index
= N_TEXT
;
1209 else if (obj_datasec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".data"))
1211 obj_datasec (abfd
) = newsect
;
1212 newsect
->target_index
= N_DATA
;
1214 else if (obj_bsssec (abfd
) == NULL
&& !strcmp (newsect
->name
, ".bss"))
1216 obj_bsssec (abfd
) = newsect
;
1217 newsect
->target_index
= N_BSS
;
1221 /* We allow more than three sections internally. */
1222 return _bfd_generic_new_section_hook (abfd
, newsect
);
1226 NAME (aout
, set_section_contents
) (bfd
*abfd
,
1228 const void * location
,
1230 bfd_size_type count
)
1232 if (! abfd
->output_has_begun
)
1234 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
1238 if (section
== obj_bsssec (abfd
))
1240 bfd_set_error (bfd_error_no_contents
);
1244 if (section
!= obj_textsec (abfd
)
1245 && section
!= obj_datasec (abfd
))
1247 if (aout_section_merge_with_text_p (abfd
, section
))
1248 section
->filepos
= obj_textsec (abfd
)->filepos
+
1249 (section
->vma
- obj_textsec (abfd
)->vma
);
1253 /* xgettext:c-format */
1254 (_("%pB: can not represent section `%pA' in a.out object file format"),
1256 bfd_set_error (bfd_error_nonrepresentable_section
);
1263 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1264 || bfd_bwrite (location
, count
, abfd
) != count
)
1271 /* Read the external symbols from an a.out file. */
1274 aout_get_external_symbols (bfd
*abfd
)
1276 if (obj_aout_external_syms (abfd
) == NULL
)
1278 bfd_size_type count
;
1279 struct external_nlist
*syms
;
1280 bfd_size_type amt
= exec_hdr (abfd
)->a_syms
;
1282 count
= amt
/ EXTERNAL_NLIST_SIZE
;
1284 return TRUE
; /* Nothing to do. */
1287 if (! bfd_get_file_window (abfd
, obj_sym_filepos (abfd
), amt
,
1288 &obj_aout_sym_window (abfd
), TRUE
))
1290 syms
= (struct external_nlist
*) obj_aout_sym_window (abfd
).data
;
1292 /* We allocate using malloc to make the values easy to free
1293 later on. If we put them on the objalloc it might not be
1294 possible to free them. */
1295 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0)
1297 syms
= (struct external_nlist
*) _bfd_malloc_and_read (abfd
, amt
, amt
);
1302 obj_aout_external_syms (abfd
) = syms
;
1303 obj_aout_external_sym_count (abfd
) = count
;
1306 if (obj_aout_external_strings (abfd
) == NULL
1307 && exec_hdr (abfd
)->a_syms
!= 0)
1309 unsigned char string_chars
[BYTES_IN_WORD
];
1310 bfd_size_type stringsize
;
1312 bfd_size_type amt
= BYTES_IN_WORD
;
1314 /* Get the size of the strings. */
1315 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1316 || bfd_bread ((void *) string_chars
, amt
, abfd
) != amt
)
1318 stringsize
= GET_WORD (abfd
, string_chars
);
1319 if (stringsize
== 0)
1321 else if (stringsize
< BYTES_IN_WORD
1322 || (size_t) stringsize
!= stringsize
)
1324 bfd_set_error (bfd_error_bad_value
);
1329 if (stringsize
>= BYTES_IN_WORD
)
1331 if (! bfd_get_file_window (abfd
, obj_str_filepos (abfd
), stringsize
+ 1,
1332 &obj_aout_string_window (abfd
), TRUE
))
1334 strings
= (char *) obj_aout_string_window (abfd
).data
;
1339 strings
= (char *) bfd_malloc (stringsize
+ 1);
1340 if (strings
== NULL
)
1343 if (stringsize
>= BYTES_IN_WORD
)
1345 /* Keep the string count in the buffer for convenience
1346 when indexing with e_strx. */
1347 amt
= stringsize
- BYTES_IN_WORD
;
1348 if (bfd_bread (strings
+ BYTES_IN_WORD
, amt
, abfd
) != amt
)
1355 /* Ensure that a zero index yields an empty string. */
1358 /* Ensure that the string buffer is NUL terminated. */
1359 strings
[stringsize
] = 0;
1361 obj_aout_external_strings (abfd
) = strings
;
1362 obj_aout_external_string_size (abfd
) = stringsize
;
1368 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1369 and symbol->value fields of CACHE_PTR will be set from the a.out
1370 nlist structure. This function is responsible for setting
1371 symbol->flags and symbol->section, and adjusting symbol->value. */
1374 translate_from_native_sym_flags (bfd
*abfd
, aout_symbol_type
*cache_ptr
)
1378 if ((cache_ptr
->type
& N_STAB
) != 0
1379 || cache_ptr
->type
== N_FN
)
1383 /* This is a debugging symbol. */
1384 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1386 /* Work out the symbol section. */
1387 switch (cache_ptr
->type
& N_TYPE
)
1391 sec
= obj_textsec (abfd
);
1394 sec
= obj_datasec (abfd
);
1397 sec
= obj_bsssec (abfd
);
1401 sec
= bfd_abs_section_ptr
;
1405 cache_ptr
->symbol
.section
= sec
;
1406 cache_ptr
->symbol
.value
-= sec
->vma
;
1411 /* Get the default visibility. This does not apply to all types, so
1412 we just hold it in a local variable to use if wanted. */
1413 if ((cache_ptr
->type
& N_EXT
) == 0)
1414 visible
= BSF_LOCAL
;
1416 visible
= BSF_GLOBAL
;
1418 switch (cache_ptr
->type
)
1421 case N_ABS
: case N_ABS
| N_EXT
:
1422 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1423 cache_ptr
->symbol
.flags
= visible
;
1426 case N_UNDF
| N_EXT
:
1427 if (cache_ptr
->symbol
.value
!= 0)
1429 /* This is a common symbol. */
1430 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1431 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1435 cache_ptr
->symbol
.flags
= 0;
1436 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1440 case N_TEXT
: case N_TEXT
| N_EXT
:
1441 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1442 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1443 cache_ptr
->symbol
.flags
= visible
;
1446 /* N_SETV symbols used to represent set vectors placed in the
1447 data section. They are no longer generated. Theoretically,
1448 it was possible to extract the entries and combine them with
1449 new ones, although I don't know if that was ever actually
1450 done. Unless that feature is restored, treat them as data
1452 case N_SETV
: case N_SETV
| N_EXT
:
1453 case N_DATA
: case N_DATA
| N_EXT
:
1454 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1455 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1456 cache_ptr
->symbol
.flags
= visible
;
1459 case N_BSS
: case N_BSS
| N_EXT
:
1460 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1461 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1462 cache_ptr
->symbol
.flags
= visible
;
1465 case N_SETA
: case N_SETA
| N_EXT
:
1466 case N_SETT
: case N_SETT
| N_EXT
:
1467 case N_SETD
: case N_SETD
| N_EXT
:
1468 case N_SETB
: case N_SETB
| N_EXT
:
1470 /* This code is no longer needed. It used to be used to make
1471 the linker handle set symbols, but they are now handled in
1472 the add_symbols routine instead. */
1473 switch (cache_ptr
->type
& N_TYPE
)
1476 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1479 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1482 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1485 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1489 cache_ptr
->symbol
.flags
|= BSF_CONSTRUCTOR
;
1494 /* This symbol is the text of a warning message. The next
1495 symbol is the symbol to associate the warning with. If a
1496 reference is made to that symbol, a warning is issued. */
1497 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_WARNING
;
1498 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1501 case N_INDR
: case N_INDR
| N_EXT
:
1502 /* An indirect symbol. This consists of two symbols in a row.
1503 The first symbol is the name of the indirection. The second
1504 symbol is the name of the target. A reference to the first
1505 symbol becomes a reference to the second. */
1506 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_INDIRECT
| visible
;
1507 cache_ptr
->symbol
.section
= bfd_ind_section_ptr
;
1511 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1512 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1516 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1517 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1521 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1522 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1523 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1527 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1528 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1529 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1533 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1534 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1535 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1542 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1545 translate_to_native_sym_flags (bfd
*abfd
,
1547 struct external_nlist
*sym_pointer
)
1549 bfd_vma value
= cache_ptr
->value
;
1553 /* Mask out any existing type bits in case copying from one section
1555 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1557 sec
= bfd_asymbol_section (cache_ptr
);
1562 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1565 /* xgettext:c-format */
1566 (_("%pB: can not represent section for symbol `%s' in a.out "
1567 "object file format"),
1569 cache_ptr
->name
!= NULL
? cache_ptr
->name
: _("*unknown*"));
1570 bfd_set_error (bfd_error_nonrepresentable_section
);
1574 if (sec
->output_section
!= NULL
)
1576 off
= sec
->output_offset
;
1577 sec
= sec
->output_section
;
1580 if (bfd_is_abs_section (sec
))
1581 sym_pointer
->e_type
[0] |= N_ABS
;
1582 else if (sec
== obj_textsec (abfd
))
1583 sym_pointer
->e_type
[0] |= N_TEXT
;
1584 else if (sec
== obj_datasec (abfd
))
1585 sym_pointer
->e_type
[0] |= N_DATA
;
1586 else if (sec
== obj_bsssec (abfd
))
1587 sym_pointer
->e_type
[0] |= N_BSS
;
1588 else if (bfd_is_und_section (sec
))
1589 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1590 else if (bfd_is_ind_section (sec
))
1591 sym_pointer
->e_type
[0] = N_INDR
;
1592 else if (bfd_is_com_section (sec
))
1593 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1596 if (aout_section_merge_with_text_p (abfd
, sec
))
1597 sym_pointer
->e_type
[0] |= N_TEXT
;
1601 /* xgettext:c-format */
1602 (_("%pB: can not represent section `%pA' in a.out object file format"),
1604 bfd_set_error (bfd_error_nonrepresentable_section
);
1609 /* Turn the symbol from section relative to absolute again. */
1610 value
+= sec
->vma
+ off
;
1612 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1613 sym_pointer
->e_type
[0] = N_WARNING
;
1615 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1616 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1617 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1618 sym_pointer
->e_type
[0] |= N_EXT
;
1619 else if ((cache_ptr
->flags
& BSF_LOCAL
) != 0)
1620 sym_pointer
->e_type
[0] &= ~N_EXT
;
1622 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1624 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1628 case N_ABS
: type
= N_SETA
; break;
1629 case N_TEXT
: type
= N_SETT
; break;
1630 case N_DATA
: type
= N_SETD
; break;
1631 case N_BSS
: type
= N_SETB
; break;
1633 sym_pointer
->e_type
[0] = type
;
1636 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1640 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1643 case N_ABS
: type
= N_WEAKA
; break;
1644 case N_TEXT
: type
= N_WEAKT
; break;
1645 case N_DATA
: type
= N_WEAKD
; break;
1646 case N_BSS
: type
= N_WEAKB
; break;
1647 case N_UNDF
: type
= N_WEAKU
; break;
1649 sym_pointer
->e_type
[0] = type
;
1652 PUT_WORD (abfd
, value
, sym_pointer
->e_value
);
1657 /* Native-level interface to symbols. */
1660 NAME (aout
, make_empty_symbol
) (bfd
*abfd
)
1662 size_t amt
= sizeof (aout_symbol_type
);
1664 aout_symbol_type
*new_symbol
= (aout_symbol_type
*) bfd_zalloc (abfd
, amt
);
1667 new_symbol
->symbol
.the_bfd
= abfd
;
1669 return &new_symbol
->symbol
;
1672 /* Translate a set of internal symbols into external symbols. */
1675 NAME (aout
, translate_symbol_table
) (bfd
*abfd
,
1676 aout_symbol_type
*in
,
1677 struct external_nlist
*ext
,
1678 bfd_size_type count
,
1680 bfd_size_type strsize
,
1681 bfd_boolean dynamic
)
1683 struct external_nlist
*ext_end
;
1685 ext_end
= ext
+ count
;
1686 for (; ext
< ext_end
; ext
++, in
++)
1690 x
= GET_WORD (abfd
, ext
->e_strx
);
1691 in
->symbol
.the_bfd
= abfd
;
1693 /* For the normal symbols, the zero index points at the number
1694 of bytes in the string table but is to be interpreted as the
1695 null string. For the dynamic symbols, the number of bytes in
1696 the string table is stored in the __DYNAMIC structure and the
1697 zero index points at an actual string. */
1698 if (x
== 0 && ! dynamic
)
1699 in
->symbol
.name
= "";
1700 else if (x
< strsize
)
1701 in
->symbol
.name
= str
+ x
;
1705 (_("%pB: invalid string offset %" PRIu64
" >= %" PRIu64
),
1706 abfd
, (uint64_t) x
, (uint64_t) strsize
);
1707 bfd_set_error (bfd_error_bad_value
);
1711 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1712 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1713 in
->other
= H_GET_8 (abfd
, ext
->e_other
);
1714 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1715 in
->symbol
.udata
.p
= NULL
;
1717 if (! translate_from_native_sym_flags (abfd
, in
))
1721 in
->symbol
.flags
|= BSF_DYNAMIC
;
1727 /* We read the symbols into a buffer, which is discarded when this
1728 function exits. We read the strings into a buffer large enough to
1729 hold them all plus all the cached symbol entries. */
1732 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1734 struct external_nlist
*old_external_syms
;
1735 aout_symbol_type
*cached
;
1736 bfd_size_type cached_size
;
1738 /* If there's no work to be done, don't do any. */
1739 if (obj_aout_symbols (abfd
) != NULL
)
1742 old_external_syms
= obj_aout_external_syms (abfd
);
1744 if (! aout_get_external_symbols (abfd
))
1747 cached_size
= obj_aout_external_sym_count (abfd
);
1748 if (cached_size
== 0)
1749 return TRUE
; /* Nothing to do. */
1751 cached_size
*= sizeof (aout_symbol_type
);
1752 cached
= (aout_symbol_type
*) bfd_zmalloc (cached_size
);
1756 /* Convert from external symbol information to internal. */
1757 if (! (NAME (aout
, translate_symbol_table
)
1759 obj_aout_external_syms (abfd
),
1760 obj_aout_external_sym_count (abfd
),
1761 obj_aout_external_strings (abfd
),
1762 obj_aout_external_string_size (abfd
),
1769 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
1771 obj_aout_symbols (abfd
) = cached
;
1773 /* It is very likely that anybody who calls this function will not
1774 want the external symbol information, so if it was allocated
1775 because of our call to aout_get_external_symbols, we free it up
1776 right away to save space. */
1777 if (old_external_syms
== NULL
1778 && obj_aout_external_syms (abfd
) != NULL
)
1781 bfd_free_window (&obj_aout_sym_window (abfd
));
1783 free (obj_aout_external_syms (abfd
));
1785 obj_aout_external_syms (abfd
) = NULL
;
1791 /* We use a hash table when writing out symbols so that we only write
1792 out a particular string once. This helps particularly when the
1793 linker writes out stabs debugging entries, because each different
1794 contributing object file tends to have many duplicate stabs
1797 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1798 if BFD_TRADITIONAL_FORMAT is set. */
1800 /* Get the index of a string in a strtab, adding it if it is not
1803 static inline bfd_size_type
1804 add_to_stringtab (bfd
*abfd
,
1805 struct bfd_strtab_hash
*tab
,
1810 bfd_size_type str_index
;
1812 /* An index of 0 always means the empty string. */
1813 if (str
== 0 || *str
== '\0')
1816 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1817 doesn't understand a hashed string table. */
1819 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1822 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1824 if (str_index
!= (bfd_size_type
) -1)
1825 /* Add BYTES_IN_WORD to the return value to account for the
1826 space taken up by the string table size. */
1827 str_index
+= BYTES_IN_WORD
;
1832 /* Write out a strtab. ABFD is already at the right location in the
1836 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1838 bfd_byte buffer
[BYTES_IN_WORD
];
1839 size_t amt
= BYTES_IN_WORD
;
1841 /* The string table starts with the size. */
1842 PUT_WORD (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_WORD
, buffer
);
1843 if (bfd_bwrite ((void *) buffer
, amt
, abfd
) != amt
)
1846 return _bfd_stringtab_emit (abfd
, tab
);
1850 NAME (aout
, write_syms
) (bfd
*abfd
)
1852 unsigned int count
;
1853 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1854 struct bfd_strtab_hash
*strtab
;
1856 strtab
= _bfd_stringtab_init ();
1860 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1862 asymbol
*g
= generic
[count
];
1864 struct external_nlist nsp
;
1867 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, FALSE
);
1868 if (indx
== (bfd_size_type
) -1)
1870 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1872 if (bfd_asymbol_flavour (g
) == abfd
->xvec
->flavour
)
1874 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1875 H_PUT_8 (abfd
, aout_symbol (g
)->other
, nsp
.e_other
);
1876 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1880 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1881 H_PUT_8 (abfd
, 0, nsp
.e_other
);
1882 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1885 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1888 amt
= EXTERNAL_NLIST_SIZE
;
1889 if (bfd_bwrite ((void *) &nsp
, amt
, abfd
) != amt
)
1892 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1893 here, at the end. */
1897 if (! emit_stringtab (abfd
, strtab
))
1900 _bfd_stringtab_free (strtab
);
1905 _bfd_stringtab_free (strtab
);
1910 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1912 unsigned int counter
= 0;
1913 aout_symbol_type
*symbase
;
1915 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1918 for (symbase
= obj_aout_symbols (abfd
);
1919 counter
++ < bfd_get_symcount (abfd
);
1921 *(location
++) = (asymbol
*) (symbase
++);
1923 return bfd_get_symcount (abfd
);
1926 /* Standard reloc stuff. */
1927 /* Output standard relocation information to a file in target byte order. */
1929 extern void NAME (aout
, swap_std_reloc_out
)
1930 (bfd
*, arelent
*, struct reloc_std_external
*);
1933 NAME (aout
, swap_std_reloc_out
) (bfd
*abfd
,
1935 struct reloc_std_external
*natptr
)
1938 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1940 unsigned int r_length
;
1942 int r_baserel
, r_jmptable
, r_relative
;
1943 asection
*output_section
= sym
->section
->output_section
;
1945 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
1947 BFD_ASSERT (g
->howto
!= NULL
);
1949 if (bfd_get_reloc_size (g
->howto
) != 8)
1950 r_length
= g
->howto
->size
; /* Size as a power of two. */
1954 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1955 /* XXX This relies on relocs coming from a.out files. */
1956 r_baserel
= (g
->howto
->type
& 8) != 0;
1957 r_jmptable
= (g
->howto
->type
& 16) != 0;
1958 r_relative
= (g
->howto
->type
& 32) != 0;
1960 /* Name was clobbered by aout_write_syms to be symbol index. */
1962 /* If this relocation is relative to a symbol then set the
1963 r_index to the symbols index, and the r_extern bit.
1965 Absolute symbols can come in in two ways, either as an offset
1966 from the abs section, or as a symbol which has an abs value.
1967 check for that here. */
1969 if (bfd_is_com_section (output_section
)
1970 || bfd_is_abs_section (output_section
)
1971 || bfd_is_und_section (output_section
)
1972 /* PR gas/3041 a.out relocs against weak symbols
1973 must be treated as if they were against externs. */
1974 || (sym
->flags
& BSF_WEAK
))
1976 if (bfd_abs_section_ptr
->symbol
== sym
)
1978 /* Whoops, looked like an abs symbol, but is
1979 really an offset from the abs section. */
1985 /* Fill in symbol. */
1987 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
1992 /* Just an ordinary section. */
1994 r_index
= output_section
->target_index
;
1997 /* Now the fun stuff. */
1998 if (bfd_header_big_endian (abfd
))
2000 natptr
->r_index
[0] = r_index
>> 16;
2001 natptr
->r_index
[1] = r_index
>> 8;
2002 natptr
->r_index
[2] = r_index
;
2003 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2004 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2005 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2006 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2007 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2008 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
2012 natptr
->r_index
[2] = r_index
>> 16;
2013 natptr
->r_index
[1] = r_index
>> 8;
2014 natptr
->r_index
[0] = r_index
;
2015 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2016 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2017 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2018 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2019 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2020 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
2024 /* Extended stuff. */
2025 /* Output extended relocation information to a file in target byte order. */
2027 extern void NAME (aout
, swap_ext_reloc_out
)
2028 (bfd
*, arelent
*, struct reloc_ext_external
*);
2031 NAME (aout
, swap_ext_reloc_out
) (bfd
*abfd
,
2033 struct reloc_ext_external
*natptr
)
2037 unsigned int r_type
;
2039 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2040 asection
*output_section
= sym
->section
->output_section
;
2042 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2044 r_type
= (unsigned int) g
->howto
->type
;
2046 r_addend
= g
->addend
;
2047 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2048 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2050 /* If this relocation is relative to a symbol then set the
2051 r_index to the symbols index, and the r_extern bit.
2053 Absolute symbols can come in in two ways, either as an offset
2054 from the abs section, or as a symbol which has an abs value.
2055 check for that here. */
2056 if (bfd_is_abs_section (bfd_asymbol_section (sym
)))
2061 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2063 if (bfd_is_und_section (bfd_asymbol_section (sym
))
2064 || (sym
->flags
& BSF_GLOBAL
) != 0)
2068 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2072 /* Just an ordinary section. */
2074 r_index
= output_section
->target_index
;
2077 /* Now the fun stuff. */
2078 if (bfd_header_big_endian (abfd
))
2080 natptr
->r_index
[0] = r_index
>> 16;
2081 natptr
->r_index
[1] = r_index
>> 8;
2082 natptr
->r_index
[2] = r_index
;
2083 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2084 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2088 natptr
->r_index
[2] = r_index
>> 16;
2089 natptr
->r_index
[1] = r_index
>> 8;
2090 natptr
->r_index
[0] = r_index
;
2091 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2092 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
));
2095 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2098 /* BFD deals internally with all things based from the section they're
2099 in. so, something in 10 bytes into a text section with a base of
2100 50 would have a symbol (.text+10) and know .text vma was 50.
2102 Aout keeps all it's symbols based from zero, so the symbol would
2103 contain 60. This macro subs the base of each section from the value
2104 to give the true offset from the section. */
2106 #define MOVE_ADDRESS(ad) \
2109 /* Undefined symbol. */ \
2110 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2111 cache_ptr->addend = ad; \
2115 /* Defined, section relative. Replace symbol with pointer to \
2116 symbol which points to section. */ \
2120 case N_TEXT | N_EXT: \
2121 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2122 cache_ptr->addend = ad - su->textsec->vma; \
2125 case N_DATA | N_EXT: \
2126 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2127 cache_ptr->addend = ad - su->datasec->vma; \
2130 case N_BSS | N_EXT: \
2131 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2132 cache_ptr->addend = ad - su->bsssec->vma; \
2136 case N_ABS | N_EXT: \
2137 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2138 cache_ptr->addend = ad; \
2144 NAME (aout
, swap_ext_reloc_in
) (bfd
*abfd
,
2145 struct reloc_ext_external
*bytes
,
2148 bfd_size_type symcount
)
2150 unsigned int r_index
;
2152 unsigned int r_type
;
2153 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2155 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2157 /* Now the fun stuff. */
2158 if (bfd_header_big_endian (abfd
))
2160 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2161 | ((unsigned int) bytes
->r_index
[1] << 8)
2162 | bytes
->r_index
[2]);
2163 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2164 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2165 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
2169 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2170 | ((unsigned int) bytes
->r_index
[1] << 8)
2171 | bytes
->r_index
[0]);
2172 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2173 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2174 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2177 if (r_type
< TABLE_SIZE (howto_table_ext
))
2178 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2180 cache_ptr
->howto
= NULL
;
2182 /* Base relative relocs are always against the symbol table,
2183 regardless of the setting of r_extern. r_extern just reflects
2184 whether the symbol the reloc is against is local or global. */
2185 if (r_type
== (unsigned int) RELOC_BASE10
2186 || r_type
== (unsigned int) RELOC_BASE13
2187 || r_type
== (unsigned int) RELOC_BASE22
)
2190 if (r_extern
&& r_index
> symcount
)
2192 /* We could arrange to return an error, but it might be useful
2193 to see the file even if it is bad. */
2198 MOVE_ADDRESS (GET_SWORD (abfd
, bytes
->r_addend
));
2202 NAME (aout
, swap_std_reloc_in
) (bfd
*abfd
,
2203 struct reloc_std_external
*bytes
,
2206 bfd_size_type symcount
)
2208 unsigned int r_index
;
2210 unsigned int r_length
;
2212 int r_baserel
, r_jmptable
, r_relative
;
2213 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2214 unsigned int howto_idx
;
2216 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
2218 /* Now the fun stuff. */
2219 if (bfd_header_big_endian (abfd
))
2221 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2222 | ((unsigned int) bytes
->r_index
[1] << 8)
2223 | bytes
->r_index
[2]);
2224 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2225 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2226 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2227 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2228 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2229 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2230 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
2234 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2235 | ((unsigned int) bytes
->r_index
[1] << 8)
2236 | bytes
->r_index
[0]);
2237 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2238 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2239 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2240 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2241 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2242 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2243 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2246 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2247 + 16 * r_jmptable
+ 32 * r_relative
);
2248 if (howto_idx
< TABLE_SIZE (howto_table_std
))
2250 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2251 if (cache_ptr
->howto
->type
== (unsigned int) -1)
2252 cache_ptr
->howto
= NULL
;
2255 cache_ptr
->howto
= NULL
;
2257 /* Base relative relocs are always against the symbol table,
2258 regardless of the setting of r_extern. r_extern just reflects
2259 whether the symbol the reloc is against is local or global. */
2263 if (r_extern
&& r_index
>= symcount
)
2265 /* We could arrange to return an error, but it might be useful
2266 to see the file even if it is bad. FIXME: Of course this
2267 means that objdump -r *doesn't* see the actual reloc, and
2268 objcopy silently writes a different reloc. */
2276 /* Read and swap the relocs for a section. */
2279 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
2281 bfd_size_type count
;
2282 bfd_size_type reloc_size
;
2284 arelent
*reloc_cache
;
2286 unsigned int counter
= 0;
2290 if (asect
->relocation
)
2293 if (asect
->flags
& SEC_CONSTRUCTOR
)
2296 if (asect
== obj_datasec (abfd
))
2297 reloc_size
= exec_hdr (abfd
)->a_drsize
;
2298 else if (asect
== obj_textsec (abfd
))
2299 reloc_size
= exec_hdr (abfd
)->a_trsize
;
2300 else if (asect
== obj_bsssec (abfd
))
2304 bfd_set_error (bfd_error_invalid_operation
);
2308 each_size
= obj_reloc_entry_size (abfd
);
2309 count
= reloc_size
/ each_size
;
2311 return TRUE
; /* Nothing to be done. */
2313 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2315 relocs
= _bfd_malloc_and_read (abfd
, reloc_size
, reloc_size
);
2319 amt
= count
* sizeof (arelent
);
2320 reloc_cache
= (arelent
*) bfd_zmalloc (amt
);
2321 if (reloc_cache
== NULL
)
2327 cache_ptr
= reloc_cache
;
2328 if (each_size
== RELOC_EXT_SIZE
)
2330 struct reloc_ext_external
*rptr
= (struct reloc_ext_external
*) relocs
;
2332 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2333 MY_swap_ext_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2334 (bfd_size_type
) bfd_get_symcount (abfd
));
2338 struct reloc_std_external
*rptr
= (struct reloc_std_external
*) relocs
;
2340 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2341 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2342 (bfd_size_type
) bfd_get_symcount (abfd
));
2347 asect
->relocation
= reloc_cache
;
2348 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2353 /* Write out a relocation section into an object file. */
2356 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2359 unsigned char *native
, *natptr
;
2362 unsigned int count
= section
->reloc_count
;
2363 bfd_size_type natsize
;
2365 if (count
== 0 || section
->orelocation
== NULL
)
2368 each_size
= obj_reloc_entry_size (abfd
);
2369 natsize
= (bfd_size_type
) each_size
* count
;
2370 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2374 generic
= section
->orelocation
;
2376 if (each_size
== RELOC_EXT_SIZE
)
2378 for (natptr
= native
;
2380 --count
, natptr
+= each_size
, ++generic
)
2382 /* PR 20921: If the howto field has not been initialised then skip
2384 PR 20929: Similarly for the symbol field. */
2385 if ((*generic
)->howto
== NULL
2386 || (*generic
)->sym_ptr_ptr
== NULL
)
2388 bfd_set_error (bfd_error_invalid_operation
);
2389 _bfd_error_handler (_("%pB: attempt to write out "
2390 "unknown reloc type"), abfd
);
2393 MY_swap_ext_reloc_out (abfd
, *generic
,
2394 (struct reloc_ext_external
*) natptr
);
2399 for (natptr
= native
;
2401 --count
, natptr
+= each_size
, ++generic
)
2403 if ((*generic
)->howto
== NULL
2404 || (*generic
)->sym_ptr_ptr
== NULL
)
2406 bfd_set_error (bfd_error_invalid_operation
);
2407 _bfd_error_handler (_("%pB: attempt to write out "
2408 "unknown reloc type"), abfd
);
2411 MY_swap_std_reloc_out (abfd
, *generic
,
2412 (struct reloc_std_external
*) natptr
);
2416 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2418 bfd_release (abfd
, native
);
2421 bfd_release (abfd
, native
);
2426 /* This is stupid. This function should be a boolean predicate. */
2429 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2434 arelent
*tblptr
= section
->relocation
;
2437 if (section
== obj_bsssec (abfd
))
2443 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
) (abfd
, section
, symbols
)))
2446 if (section
->flags
& SEC_CONSTRUCTOR
)
2448 arelent_chain
*chain
= section
->constructor_chain
;
2449 for (count
= 0; count
< section
->reloc_count
; count
++)
2451 *relptr
++ = &chain
->relent
;
2452 chain
= chain
->next
;
2457 tblptr
= section
->relocation
;
2459 for (count
= 0; count
++ < section
->reloc_count
; )
2461 *relptr
++ = tblptr
++;
2466 return section
->reloc_count
;
2470 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2472 bfd_size_type count
;
2474 if (bfd_get_format (abfd
) != bfd_object
)
2476 bfd_set_error (bfd_error_invalid_operation
);
2480 if (asect
->flags
& SEC_CONSTRUCTOR
)
2481 count
= asect
->reloc_count
;
2482 else if (asect
== obj_datasec (abfd
))
2483 count
= exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
2484 else if (asect
== obj_textsec (abfd
))
2485 count
= exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
2486 else if (asect
== obj_bsssec (abfd
))
2490 bfd_set_error (bfd_error_invalid_operation
);
2494 if (count
>= LONG_MAX
/ sizeof (arelent
*))
2496 bfd_set_error (bfd_error_file_too_big
);
2499 return (count
+ 1) * sizeof (arelent
*);
2503 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2505 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2508 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2512 NAME (aout
, get_lineno
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2513 asymbol
*ignore_symbol ATTRIBUTE_UNUSED
)
2519 NAME (aout
, get_symbol_info
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2523 bfd_symbol_info (symbol
, ret
);
2525 if (ret
->type
== '?')
2527 int type_code
= aout_symbol (symbol
)->type
& 0xff;
2528 const char *stab_name
= bfd_get_stab_name (type_code
);
2529 static char buf
[10];
2531 if (stab_name
== NULL
)
2533 sprintf (buf
, "(%d)", type_code
);
2537 ret
->stab_type
= type_code
;
2538 ret
->stab_other
= (unsigned) (aout_symbol (symbol
)->other
& 0xff);
2539 ret
->stab_desc
= (unsigned) (aout_symbol (symbol
)->desc
& 0xffff);
2540 ret
->stab_name
= stab_name
;
2545 NAME (aout
, print_symbol
) (bfd
*abfd
,
2548 bfd_print_symbol_type how
)
2550 FILE *file
= (FILE *)afile
;
2554 case bfd_print_symbol_name
:
2556 fprintf (file
,"%s", symbol
->name
);
2558 case bfd_print_symbol_more
:
2559 fprintf (file
,"%4x %2x %2x",
2560 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2561 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2562 (unsigned) (aout_symbol (symbol
)->type
));
2564 case bfd_print_symbol_all
:
2566 const char *section_name
= symbol
->section
->name
;
2568 bfd_print_symbol_vandf (abfd
, (void *)file
, symbol
);
2570 fprintf (file
," %-5s %04x %02x %02x",
2572 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2573 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2574 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2576 fprintf (file
," %s", symbol
->name
);
2582 /* If we don't have to allocate more than 1MB to hold the generic
2583 symbols, we use the generic minisymbol methord: it's faster, since
2584 it only translates the symbols once, not multiple times. */
2585 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2587 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2588 symbols. The minisymbol_to_symbol function translates these into
2589 BFD asymbol structures. */
2592 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2593 bfd_boolean dynamic
,
2595 unsigned int *sizep
)
2598 /* We could handle the dynamic symbols here as well, but it's
2599 easier to hand them off. */
2600 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2602 if (! aout_get_external_symbols (abfd
))
2605 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2606 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2608 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2610 /* By passing the external symbols back from this routine, we are
2611 giving up control over the memory block. Clear
2612 obj_aout_external_syms, so that we do not try to free it
2614 obj_aout_external_syms (abfd
) = NULL
;
2616 *sizep
= EXTERNAL_NLIST_SIZE
;
2617 return obj_aout_external_sym_count (abfd
);
2620 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2621 unmodified a.out symbol. The SYM argument is a structure returned
2622 by bfd_make_empty_symbol, which we fill in here. */
2625 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2626 bfd_boolean dynamic
,
2627 const void * minisym
,
2631 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2632 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2634 memset (sym
, 0, sizeof (aout_symbol_type
));
2636 /* We call translate_symbol_table to translate a single symbol. */
2637 if (! (NAME (aout
, translate_symbol_table
)
2639 (aout_symbol_type
*) sym
,
2640 (struct external_nlist
*) minisym
,
2642 obj_aout_external_strings (abfd
),
2643 obj_aout_external_string_size (abfd
),
2650 /* Provided a BFD, a section and an offset into the section, calculate
2651 and return the name of the source file and the line nearest to the
2655 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2659 const char **filename_ptr
,
2660 const char **functionname_ptr
,
2661 unsigned int *line_ptr
,
2662 unsigned int *disriminator_ptr
)
2664 /* Run down the file looking for the filename, function and linenumber. */
2666 const char *directory_name
= NULL
;
2667 const char *main_file_name
= NULL
;
2668 const char *current_file_name
= NULL
;
2669 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2670 const char *line_directory_name
= NULL
; /* Value of directory_name at line number. */
2671 bfd_vma low_line_vma
= 0;
2672 bfd_vma low_func_vma
= 0;
2674 bfd_size_type filelen
, funclen
;
2677 *filename_ptr
= abfd
->filename
;
2678 *functionname_ptr
= NULL
;
2680 if (disriminator_ptr
)
2681 *disriminator_ptr
= 0;
2683 if (symbols
!= NULL
)
2685 for (p
= symbols
; *p
; p
++)
2687 aout_symbol_type
*q
= (aout_symbol_type
*) (*p
);
2692 /* If this looks like a file name symbol, and it comes after
2693 the line number we have found so far, but before the
2694 offset, then we have probably not found the right line
2696 if (q
->symbol
.value
<= offset
2697 && ((q
->symbol
.value
> low_line_vma
2698 && (line_file_name
!= NULL
2700 || (q
->symbol
.value
> low_func_vma
2703 const char *symname
;
2705 symname
= q
->symbol
.name
;
2708 && strlen (symname
) > 2
2709 && strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2711 if (q
->symbol
.value
> low_line_vma
)
2714 line_file_name
= NULL
;
2716 if (q
->symbol
.value
> low_func_vma
)
2723 /* If this symbol is less than the offset, but greater than
2724 the line number we have found so far, then we have not
2725 found the right line number. */
2726 if (q
->symbol
.value
<= offset
)
2728 if (q
->symbol
.value
> low_line_vma
)
2731 line_file_name
= NULL
;
2733 if (q
->symbol
.value
> low_func_vma
)
2737 main_file_name
= current_file_name
= q
->symbol
.name
;
2738 /* Look ahead to next symbol to check if that too is an N_SO. */
2742 q
= (aout_symbol_type
*) (*p
);
2743 if (q
->type
!= (int)N_SO
)
2746 /* Found a second N_SO First is directory; second is filename. */
2747 directory_name
= current_file_name
;
2748 main_file_name
= current_file_name
= q
->symbol
.name
;
2749 if (obj_textsec (abfd
) != section
)
2753 current_file_name
= q
->symbol
.name
;
2760 /* We'll keep this if it resolves nearer than the one we have
2762 if (q
->symbol
.value
>= low_line_vma
2763 && q
->symbol
.value
<= offset
)
2765 *line_ptr
= q
->desc
;
2766 low_line_vma
= q
->symbol
.value
;
2767 line_file_name
= current_file_name
;
2768 line_directory_name
= directory_name
;
2773 /* We'll keep this if it is nearer than the one we have already. */
2774 if (q
->symbol
.value
>= low_func_vma
2775 && q
->symbol
.value
<= offset
)
2777 low_func_vma
= q
->symbol
.value
;
2778 func
= (asymbol
*)q
;
2780 else if (q
->symbol
.value
> offset
)
2791 main_file_name
= line_file_name
;
2792 directory_name
= line_directory_name
;
2795 if (main_file_name
== NULL
2796 || IS_ABSOLUTE_PATH (main_file_name
)
2797 || directory_name
== NULL
)
2800 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2805 funclen
= strlen (bfd_asymbol_name (func
));
2807 if (adata (abfd
).line_buf
!= NULL
)
2808 free (adata (abfd
).line_buf
);
2810 if (filelen
+ funclen
== 0)
2811 adata (abfd
).line_buf
= buf
= NULL
;
2814 buf
= (char *) bfd_malloc (filelen
+ funclen
+ 3);
2815 adata (abfd
).line_buf
= buf
;
2820 if (main_file_name
!= NULL
)
2822 if (IS_ABSOLUTE_PATH (main_file_name
) || directory_name
== NULL
)
2823 *filename_ptr
= main_file_name
;
2827 /* PR binutils/20891: In a corrupt input file both
2828 main_file_name and directory_name can be empty... */
2829 * filename_ptr
= NULL
;
2832 snprintf (buf
, filelen
+ 1, "%s%s", directory_name
,
2834 *filename_ptr
= buf
;
2842 const char *function
= func
->name
;
2847 /* PR binutils/20892: In a corrupt input file func can be empty. */
2848 * functionname_ptr
= NULL
;
2851 /* The caller expects a symbol name. We actually have a
2852 function name, without the leading underscore. Put the
2853 underscore back in, so that the caller gets a symbol name. */
2854 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2855 strcpy (buf
, function
);
2858 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2859 strcpy (buf
+ 1, function
);
2861 /* Have to remove : stuff. */
2862 colon
= strchr (buf
, ':');
2865 *functionname_ptr
= buf
;
2872 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2873 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2875 return adata (abfd
).exec_bytes_size
;
2878 /* Free all information we have cached for this BFD. We can always
2879 read it again later if we need it. */
2882 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2886 if (bfd_get_format (abfd
) != bfd_object
2887 || abfd
->tdata
.aout_data
== NULL
)
2890 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2891 BFCI_FREE (obj_aout_symbols (abfd
));
2893 obj_aout_external_syms (abfd
) = 0;
2894 bfd_free_window (&obj_aout_sym_window (abfd
));
2895 bfd_free_window (&obj_aout_string_window (abfd
));
2896 obj_aout_external_strings (abfd
) = 0;
2898 BFCI_FREE (obj_aout_external_syms (abfd
));
2899 BFCI_FREE (obj_aout_external_strings (abfd
));
2901 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2902 BFCI_FREE (o
->relocation
);
2908 /* a.out link code. */
2910 /* Routine to create an entry in an a.out link hash table. */
2912 struct bfd_hash_entry
*
2913 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2914 struct bfd_hash_table
*table
,
2917 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2919 /* Allocate the structure if it has not already been allocated by a
2922 ret
= (struct aout_link_hash_entry
*) bfd_hash_allocate (table
,
2927 /* Call the allocation method of the superclass. */
2928 ret
= ((struct aout_link_hash_entry
*)
2929 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2933 /* Set local fields. */
2934 ret
->written
= FALSE
;
2938 return (struct bfd_hash_entry
*) ret
;
2941 /* Initialize an a.out link hash table. */
2944 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2946 struct bfd_hash_entry
*(*newfunc
)
2947 (struct bfd_hash_entry
*, struct bfd_hash_table
*,
2949 unsigned int entsize
)
2951 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2954 /* Create an a.out link hash table. */
2956 struct bfd_link_hash_table
*
2957 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2959 struct aout_link_hash_table
*ret
;
2960 size_t amt
= sizeof (* ret
);
2962 ret
= (struct aout_link_hash_table
*) bfd_malloc (amt
);
2966 if (!NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2967 NAME (aout
, link_hash_newfunc
),
2968 sizeof (struct aout_link_hash_entry
)))
2976 /* Add all symbols from an object file to the hash table. */
2979 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2981 bfd_boolean (*add_one_symbol
)
2982 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
2983 bfd_vma
, const char *, bfd_boolean
, bfd_boolean
,
2984 struct bfd_link_hash_entry
**);
2985 struct external_nlist
*syms
;
2986 bfd_size_type sym_count
;
2989 struct aout_link_hash_entry
**sym_hash
;
2990 struct external_nlist
*p
;
2991 struct external_nlist
*pend
;
2994 syms
= obj_aout_external_syms (abfd
);
2995 sym_count
= obj_aout_external_sym_count (abfd
);
2996 strings
= obj_aout_external_strings (abfd
);
2997 if (info
->keep_memory
)
3002 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
3004 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
3005 (abfd
, info
, &syms
, &sym_count
, &strings
)))
3010 return TRUE
; /* Nothing to do. */
3012 /* We keep a list of the linker hash table entries that correspond
3013 to particular symbols. We could just look them up in the hash
3014 table, but keeping the list is more efficient. Perhaps this
3015 should be conditional on info->keep_memory. */
3016 amt
= sym_count
* sizeof (struct aout_link_hash_entry
*);
3017 sym_hash
= (struct aout_link_hash_entry
**) bfd_alloc (abfd
, amt
);
3018 if (sym_hash
== NULL
)
3020 obj_aout_sym_hashes (abfd
) = sym_hash
;
3022 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
3023 if (add_one_symbol
== NULL
)
3024 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
3027 pend
= p
+ sym_count
;
3028 for (; p
< pend
; p
++, sym_hash
++)
3039 type
= H_GET_8 (abfd
, p
->e_type
);
3041 /* Ignore debugging symbols. */
3042 if ((type
& N_STAB
) != 0)
3045 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3046 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3048 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3049 value
= GET_WORD (abfd
, p
->e_value
);
3066 /* Ignore symbols that are not externally visible. */
3069 /* Ignore local indirect symbol. */
3074 case N_UNDF
| N_EXT
:
3077 section
= bfd_und_section_ptr
;
3081 section
= bfd_com_section_ptr
;
3084 section
= bfd_abs_section_ptr
;
3086 case N_TEXT
| N_EXT
:
3087 section
= obj_textsec (abfd
);
3088 value
-= bfd_section_vma (section
);
3090 case N_DATA
| N_EXT
:
3091 case N_SETV
| N_EXT
:
3092 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3093 translate_from_native_sym_flags. */
3094 section
= obj_datasec (abfd
);
3095 value
-= bfd_section_vma (section
);
3098 section
= obj_bsssec (abfd
);
3099 value
-= bfd_section_vma (section
);
3101 case N_INDR
| N_EXT
:
3102 /* An indirect symbol. The next symbol is the symbol
3103 which this one really is. */
3104 /* See PR 20925 for a reproducer. */
3108 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3109 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3111 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3112 section
= bfd_ind_section_ptr
;
3113 flags
|= BSF_INDIRECT
;
3115 case N_COMM
| N_EXT
:
3116 section
= bfd_com_section_ptr
;
3118 case N_SETA
: case N_SETA
| N_EXT
:
3119 section
= bfd_abs_section_ptr
;
3120 flags
|= BSF_CONSTRUCTOR
;
3122 case N_SETT
: case N_SETT
| N_EXT
:
3123 section
= obj_textsec (abfd
);
3124 flags
|= BSF_CONSTRUCTOR
;
3125 value
-= bfd_section_vma (section
);
3127 case N_SETD
: case N_SETD
| N_EXT
:
3128 section
= obj_datasec (abfd
);
3129 flags
|= BSF_CONSTRUCTOR
;
3130 value
-= bfd_section_vma (section
);
3132 case N_SETB
: case N_SETB
| N_EXT
:
3133 section
= obj_bsssec (abfd
);
3134 flags
|= BSF_CONSTRUCTOR
;
3135 value
-= bfd_section_vma (section
);
3138 /* A warning symbol. The next symbol is the one to warn
3139 about. If there is no next symbol, just look away. */
3144 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3145 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3147 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3148 section
= bfd_und_section_ptr
;
3149 flags
|= BSF_WARNING
;
3152 section
= bfd_und_section_ptr
;
3156 section
= bfd_abs_section_ptr
;
3160 section
= obj_textsec (abfd
);
3161 value
-= bfd_section_vma (section
);
3165 section
= obj_datasec (abfd
);
3166 value
-= bfd_section_vma (section
);
3170 section
= obj_bsssec (abfd
);
3171 value
-= bfd_section_vma (section
);
3176 if (! ((*add_one_symbol
)
3177 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, FALSE
,
3178 (struct bfd_link_hash_entry
**) sym_hash
)))
3181 /* Restrict the maximum alignment of a common symbol based on
3182 the architecture, since a.out has no way to represent
3183 alignment requirements of a section in a .o file. FIXME:
3184 This isn't quite right: it should use the architecture of the
3185 output file, not the input files. */
3186 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3187 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3188 bfd_get_arch_info (abfd
)->section_align_power
))
3189 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3190 bfd_get_arch_info (abfd
)->section_align_power
;
3192 /* If this is a set symbol, and we are not building sets, then
3193 it is possible for the hash entry to not have been set. In
3194 such a case, treat the symbol as not globally defined. */
3195 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3197 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3201 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3208 /* Free up the internal symbols read from an a.out file. */
3211 aout_link_free_symbols (bfd
*abfd
)
3213 if (obj_aout_external_syms (abfd
) != NULL
)
3216 bfd_free_window (&obj_aout_sym_window (abfd
));
3218 free ((void *) obj_aout_external_syms (abfd
));
3220 obj_aout_external_syms (abfd
) = NULL
;
3222 if (obj_aout_external_strings (abfd
) != NULL
)
3225 bfd_free_window (&obj_aout_string_window (abfd
));
3227 free ((void *) obj_aout_external_strings (abfd
));
3229 obj_aout_external_strings (abfd
) = NULL
;
3234 /* Add symbols from an a.out object file. */
3237 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3239 if (! aout_get_external_symbols (abfd
))
3241 if (! aout_link_add_symbols (abfd
, info
))
3243 if (! info
->keep_memory
)
3245 if (! aout_link_free_symbols (abfd
))
3251 /* Look through the internal symbols to see if this object file should
3252 be included in the link. We should include this object file if it
3253 defines any symbols which are currently undefined. If this object
3254 file defines a common symbol, then we may adjust the size of the
3255 known symbol but we do not include the object file in the link
3256 (unless there is some other reason to include it). */
3259 aout_link_check_ar_symbols (bfd
*abfd
,
3260 struct bfd_link_info
*info
,
3261 bfd_boolean
*pneeded
,
3264 struct external_nlist
*p
;
3265 struct external_nlist
*pend
;
3270 /* Look through all the symbols. */
3271 p
= obj_aout_external_syms (abfd
);
3272 pend
= p
+ obj_aout_external_sym_count (abfd
);
3273 strings
= obj_aout_external_strings (abfd
);
3274 for (; p
< pend
; p
++)
3276 int type
= H_GET_8 (abfd
, p
->e_type
);
3278 struct bfd_link_hash_entry
*h
;
3280 /* Ignore symbols that are not externally visible. This is an
3281 optimization only, as we check the type more thoroughly
3283 if (((type
& N_EXT
) == 0
3284 || (type
& N_STAB
) != 0
3291 if (type
== N_WARNING
3297 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3298 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
3300 /* We are only interested in symbols that are currently
3301 undefined or common. */
3303 || (h
->type
!= bfd_link_hash_undefined
3304 && h
->type
!= bfd_link_hash_common
))
3306 if (type
== (N_INDR
| N_EXT
))
3311 if (type
== (N_TEXT
| N_EXT
)
3312 || type
== (N_DATA
| N_EXT
)
3313 || type
== (N_BSS
| N_EXT
)
3314 || type
== (N_ABS
| N_EXT
)
3315 || type
== (N_INDR
| N_EXT
))
3317 /* This object file defines this symbol. We must link it
3318 in. This is true regardless of whether the current
3319 definition of the symbol is undefined or common.
3321 If the current definition is common, we have a case in
3322 which we have already seen an object file including:
3324 and this object file from the archive includes:
3326 In such a case, whether to include this object is target
3327 dependant for backward compatibility.
3329 FIXME: The SunOS 4.1.3 linker will pull in the archive
3330 element if the symbol is defined in the .data section,
3331 but not if it is defined in the .text section. That
3332 seems a bit crazy to me, and it has not been implemented
3333 yet. However, it might be correct. */
3334 if (h
->type
== bfd_link_hash_common
)
3338 switch (info
->common_skip_ar_symbols
)
3340 case bfd_link_common_skip_none
:
3342 case bfd_link_common_skip_text
:
3343 skip
= (type
== (N_TEXT
| N_EXT
));
3345 case bfd_link_common_skip_data
:
3346 skip
= (type
== (N_DATA
| N_EXT
));
3348 case bfd_link_common_skip_all
:
3357 if (!(*info
->callbacks
3358 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3364 if (type
== (N_UNDF
| N_EXT
))
3368 value
= GET_WORD (abfd
, p
->e_value
);
3371 /* This symbol is common in the object from the archive
3373 if (h
->type
== bfd_link_hash_undefined
)
3378 symbfd
= h
->u
.undef
.abfd
;
3381 /* This symbol was created as undefined from
3382 outside BFD. We assume that we should link
3383 in the object file. This is done for the -u
3384 option in the linker. */
3385 if (!(*info
->callbacks
3386 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3391 /* Turn the current link symbol into a common
3392 symbol. It is already on the undefs list. */
3393 h
->type
= bfd_link_hash_common
;
3394 h
->u
.c
.p
= (struct bfd_link_hash_common_entry
*)
3395 bfd_hash_allocate (&info
->hash
->table
,
3396 sizeof (struct bfd_link_hash_common_entry
));
3397 if (h
->u
.c
.p
== NULL
)
3400 h
->u
.c
.size
= value
;
3402 /* FIXME: This isn't quite right. The maximum
3403 alignment of a common symbol should be set by the
3404 architecture of the output file, not of the input
3406 power
= bfd_log2 (value
);
3407 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3408 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3409 h
->u
.c
.p
->alignment_power
= power
;
3411 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3416 /* Adjust the size of the common symbol if
3418 if (value
> h
->u
.c
.size
)
3419 h
->u
.c
.size
= value
;
3429 /* This symbol is weak but defined. We must pull it in if
3430 the current link symbol is undefined, but we don't want
3431 it if the current link symbol is common. */
3432 if (h
->type
== bfd_link_hash_undefined
)
3434 if (!(*info
->callbacks
3435 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3443 /* We do not need this object file. */
3446 /* Check a single archive element to see if we need to include it in
3447 the link. *PNEEDED is set according to whether this element is
3448 needed in the link or not. This is called from
3449 _bfd_generic_link_add_archive_symbols. */
3452 aout_link_check_archive_element (bfd
*abfd
,
3453 struct bfd_link_info
*info
,
3454 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3455 const char *name ATTRIBUTE_UNUSED
,
3456 bfd_boolean
*pneeded
)
3461 if (!aout_get_external_symbols (abfd
))
3465 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
3471 /* Potentially, the add_archive_element hook may have set a
3472 substitute BFD for us. */
3475 if (!info
->keep_memory
3476 && !aout_link_free_symbols (oldbfd
))
3478 if (!aout_get_external_symbols (abfd
))
3481 if (!aout_link_add_symbols (abfd
, info
))
3485 if (!info
->keep_memory
|| !needed
)
3487 if (!aout_link_free_symbols (abfd
))
3494 /* Given an a.out BFD, add symbols to the global hash table as
3498 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
3500 switch (bfd_get_format (abfd
))
3503 return aout_link_add_object_symbols (abfd
, info
);
3505 return _bfd_generic_link_add_archive_symbols
3506 (abfd
, info
, aout_link_check_archive_element
);
3508 bfd_set_error (bfd_error_wrong_format
);
3513 /* A hash table used for header files with N_BINCL entries. */
3515 struct aout_link_includes_table
3517 struct bfd_hash_table root
;
3520 /* A linked list of totals that we have found for a particular header
3523 struct aout_link_includes_totals
3525 struct aout_link_includes_totals
*next
;
3529 /* An entry in the header file hash table. */
3531 struct aout_link_includes_entry
3533 struct bfd_hash_entry root
;
3534 /* List of totals we have found for this file. */
3535 struct aout_link_includes_totals
*totals
;
3538 /* Look up an entry in an the header file hash table. */
3540 #define aout_link_includes_lookup(table, string, create, copy) \
3541 ((struct aout_link_includes_entry *) \
3542 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3544 /* During the final link step we need to pass around a bunch of
3545 information, so we do it in an instance of this structure. */
3547 struct aout_final_link_info
3549 /* General link information. */
3550 struct bfd_link_info
*info
;
3553 /* Reloc file positions. */
3554 file_ptr treloff
, dreloff
;
3555 /* File position of symbols. */
3558 struct bfd_strtab_hash
*strtab
;
3559 /* Header file hash table. */
3560 struct aout_link_includes_table includes
;
3561 /* A buffer large enough to hold the contents of any section. */
3563 /* A buffer large enough to hold the relocs of any section. */
3565 /* A buffer large enough to hold the symbol map of any input BFD. */
3567 /* A buffer large enough to hold output symbols of any input BFD. */
3568 struct external_nlist
*output_syms
;
3571 /* The function to create a new entry in the header file hash table. */
3573 static struct bfd_hash_entry
*
3574 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3575 struct bfd_hash_table
*table
,
3578 struct aout_link_includes_entry
*ret
=
3579 (struct aout_link_includes_entry
*) entry
;
3581 /* Allocate the structure if it has not already been allocated by a
3584 ret
= (struct aout_link_includes_entry
*)
3585 bfd_hash_allocate (table
, sizeof (* ret
));
3589 /* Call the allocation method of the superclass. */
3590 ret
= ((struct aout_link_includes_entry
*)
3591 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3594 /* Set local fields. */
3598 return (struct bfd_hash_entry
*) ret
;
3601 /* Write out a symbol that was not associated with an a.out input
3605 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3607 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3608 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3612 struct external_nlist outsym
;
3616 if (h
->root
.type
== bfd_link_hash_warning
)
3618 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3619 if (h
->root
.type
== bfd_link_hash_new
)
3623 output_bfd
= flaginfo
->output_bfd
;
3625 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3627 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3628 (output_bfd
, flaginfo
->info
, h
)))
3630 /* FIXME: No way to handle errors. */
3640 /* An indx of -2 means the symbol must be written. */
3642 && (flaginfo
->info
->strip
== strip_all
3643 || (flaginfo
->info
->strip
== strip_some
3644 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3645 FALSE
, FALSE
) == NULL
)))
3648 switch (h
->root
.type
)
3651 case bfd_link_hash_warning
:
3653 /* Avoid variable not initialized warnings. */
3655 case bfd_link_hash_new
:
3656 /* This can happen for set symbols when sets are not being
3659 case bfd_link_hash_undefined
:
3660 type
= N_UNDF
| N_EXT
;
3663 case bfd_link_hash_defined
:
3664 case bfd_link_hash_defweak
:
3668 sec
= h
->root
.u
.def
.section
->output_section
;
3669 BFD_ASSERT (bfd_is_abs_section (sec
)
3670 || sec
->owner
== output_bfd
);
3671 if (sec
== obj_textsec (output_bfd
))
3672 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3673 else if (sec
== obj_datasec (output_bfd
))
3674 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3675 else if (sec
== obj_bsssec (output_bfd
))
3676 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3678 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3680 val
= (h
->root
.u
.def
.value
3682 + h
->root
.u
.def
.section
->output_offset
);
3685 case bfd_link_hash_common
:
3686 type
= N_UNDF
| N_EXT
;
3687 val
= h
->root
.u
.c
.size
;
3689 case bfd_link_hash_undefweak
:
3693 case bfd_link_hash_indirect
:
3694 /* We ignore these symbols, since the indirected symbol is
3695 already in the hash table. */
3699 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3700 H_PUT_8 (output_bfd
, 0, outsym
.e_other
);
3701 H_PUT_16 (output_bfd
, 0, outsym
.e_desc
);
3702 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3704 if (indx
== - (bfd_size_type
) 1)
3705 /* FIXME: No way to handle errors. */
3708 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3709 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3711 amt
= EXTERNAL_NLIST_SIZE
;
3712 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3713 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3714 /* FIXME: No way to handle errors. */
3717 flaginfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
3718 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3719 ++obj_aout_external_sym_count (output_bfd
);
3724 /* Handle a link order which is supposed to generate a reloc. */
3727 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3729 struct bfd_link_order
*p
)
3731 struct bfd_link_order_reloc
*pr
;
3734 reloc_howto_type
*howto
;
3735 file_ptr
*reloff_ptr
= NULL
;
3736 struct reloc_std_external srel
;
3737 struct reloc_ext_external erel
;
3743 if (p
->type
== bfd_section_reloc_link_order
)
3746 if (bfd_is_abs_section (pr
->u
.section
))
3747 r_index
= N_ABS
| N_EXT
;
3750 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3751 r_index
= pr
->u
.section
->target_index
;
3756 struct aout_link_hash_entry
*h
;
3758 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3760 h
= ((struct aout_link_hash_entry
*)
3761 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3762 pr
->u
.name
, FALSE
, FALSE
, TRUE
));
3768 /* We decided to strip this symbol, but it turns out that we
3769 can't. Note that we lose the other and desc information
3770 here. I don't think that will ever matter for a global
3774 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3780 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3781 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3786 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3789 bfd_set_error (bfd_error_bad_value
);
3793 if (o
== obj_textsec (flaginfo
->output_bfd
))
3794 reloff_ptr
= &flaginfo
->treloff
;
3795 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3796 reloff_ptr
= &flaginfo
->dreloff
;
3800 if (obj_reloc_entry_size (flaginfo
->output_bfd
) == RELOC_STD_SIZE
)
3803 MY_put_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3811 unsigned int r_length
;
3813 r_pcrel
= (int) howto
->pc_relative
;
3814 r_baserel
= (howto
->type
& 8) != 0;
3815 r_jmptable
= (howto
->type
& 16) != 0;
3816 r_relative
= (howto
->type
& 32) != 0;
3817 if (bfd_get_reloc_size (howto
) != 8)
3818 r_length
= howto
->size
; /* Size as a power of two. */
3822 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3823 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3825 srel
.r_index
[0] = r_index
>> 16;
3826 srel
.r_index
[1] = r_index
>> 8;
3827 srel
.r_index
[2] = r_index
;
3829 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3830 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3831 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3832 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3833 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3834 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3838 srel
.r_index
[2] = r_index
>> 16;
3839 srel
.r_index
[1] = r_index
>> 8;
3840 srel
.r_index
[0] = r_index
;
3842 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3843 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3844 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3845 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3846 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3847 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3851 rel_ptr
= (void *) &srel
;
3853 /* We have to write the addend into the object file, since
3854 standard a.out relocs are in place. It would be more
3855 reliable if we had the current contents of the file here,
3856 rather than assuming zeroes, but we can't read the file since
3857 it was opened using bfd_openw. */
3858 if (pr
->addend
!= 0)
3861 bfd_reloc_status_type r
;
3865 size
= bfd_get_reloc_size (howto
);
3866 buf
= (bfd_byte
*) bfd_zmalloc (size
);
3867 if (buf
== NULL
&& size
!= 0)
3869 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3870 (bfd_vma
) pr
->addend
, buf
);
3876 case bfd_reloc_outofrange
:
3878 case bfd_reloc_overflow
:
3879 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3880 (flaginfo
->info
, NULL
,
3881 (p
->type
== bfd_section_reloc_link_order
3882 ? bfd_section_name (pr
->u
.section
)
3884 howto
->name
, pr
->addend
, NULL
, NULL
, (bfd_vma
) 0);
3887 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
, (void *) buf
,
3888 (file_ptr
) p
->offset
, size
);
3896 #ifdef MY_put_ext_reloc
3897 MY_put_ext_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
,
3898 howto
, &erel
, pr
->addend
);
3900 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, erel
.r_address
);
3902 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3904 erel
.r_index
[0] = r_index
>> 16;
3905 erel
.r_index
[1] = r_index
>> 8;
3906 erel
.r_index
[2] = r_index
;
3908 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
3909 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
3913 erel
.r_index
[2] = r_index
>> 16;
3914 erel
.r_index
[1] = r_index
>> 8;
3915 erel
.r_index
[0] = r_index
;
3917 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
3918 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
3921 PUT_WORD (flaginfo
->output_bfd
, (bfd_vma
) pr
->addend
, erel
.r_addend
);
3922 #endif /* MY_put_ext_reloc */
3924 rel_ptr
= (void *) &erel
;
3927 amt
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3928 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3929 || bfd_bwrite (rel_ptr
, amt
, flaginfo
->output_bfd
) != amt
)
3932 *reloff_ptr
+= obj_reloc_entry_size (flaginfo
->output_bfd
);
3934 /* Assert that the relocs have not run into the symbols, and that n
3935 the text relocs have not run into the data relocs. */
3936 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3937 && (reloff_ptr
!= &flaginfo
->treloff
3939 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3944 /* Get the section corresponding to a reloc index. */
3946 static INLINE asection
*
3947 aout_reloc_index_to_section (bfd
*abfd
, int indx
)
3949 switch (indx
& N_TYPE
)
3951 case N_TEXT
: return obj_textsec (abfd
);
3952 case N_DATA
: return obj_datasec (abfd
);
3953 case N_BSS
: return obj_bsssec (abfd
);
3955 case N_UNDF
: return bfd_abs_section_ptr
;
3961 /* Relocate an a.out section using standard a.out relocs. */
3964 aout_link_input_section_std (struct aout_final_link_info
*flaginfo
,
3966 asection
*input_section
,
3967 struct reloc_std_external
*relocs
,
3968 bfd_size_type rel_size
,
3971 bfd_boolean (*check_dynamic_reloc
)
3972 (struct bfd_link_info
*, bfd
*, asection
*,
3973 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
3976 bfd_boolean relocatable
;
3977 struct external_nlist
*syms
;
3979 struct aout_link_hash_entry
**sym_hashes
;
3981 bfd_size_type reloc_count
;
3982 struct reloc_std_external
*rel
;
3983 struct reloc_std_external
*rel_end
;
3985 output_bfd
= flaginfo
->output_bfd
;
3986 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
3988 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
3989 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
3990 == output_bfd
->xvec
->header_byteorder
);
3992 relocatable
= bfd_link_relocatable (flaginfo
->info
);
3993 syms
= obj_aout_external_syms (input_bfd
);
3994 strings
= obj_aout_external_strings (input_bfd
);
3995 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
3996 symbol_map
= flaginfo
->symbol_map
;
3998 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4000 rel_end
= rel
+ reloc_count
;
4001 for (; rel
< rel_end
; rel
++)
4008 reloc_howto_type
*howto
;
4009 struct aout_link_hash_entry
*h
= NULL
;
4011 bfd_reloc_status_type r
;
4013 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4015 #ifdef MY_reloc_howto
4016 howto
= MY_reloc_howto (input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
4022 unsigned int howto_idx
;
4024 if (bfd_header_big_endian (input_bfd
))
4026 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4027 | ((unsigned int) rel
->r_index
[1] << 8)
4029 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4030 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4031 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4032 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4033 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4034 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4035 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4039 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4040 | ((unsigned int) rel
->r_index
[1] << 8)
4042 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4043 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4044 r_baserel
= (0 != (rel
->r_type
[0]
4045 & RELOC_STD_BITS_BASEREL_LITTLE
));
4046 r_jmptable
= (0 != (rel
->r_type
[0]
4047 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4048 r_relative
= (0 != (rel
->r_type
[0]
4049 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4050 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4051 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4054 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4055 + 16 * r_jmptable
+ 32 * r_relative
);
4056 if (howto_idx
< TABLE_SIZE (howto_table_std
))
4057 howto
= howto_table_std
+ howto_idx
;
4065 _bfd_error_handler (_("%pB: unsupported relocation type"),
4067 bfd_set_error (bfd_error_bad_value
);
4073 /* We are generating a relocatable output file, and must
4074 modify the reloc accordingly. */
4077 /* If we know the symbol this relocation is against,
4078 convert it into a relocation against a section. This
4079 is what the native linker does. */
4080 h
= sym_hashes
[r_index
];
4082 && (h
->root
.type
== bfd_link_hash_defined
4083 || h
->root
.type
== bfd_link_hash_defweak
))
4085 asection
*output_section
;
4087 /* Change the r_extern value. */
4088 if (bfd_header_big_endian (output_bfd
))
4089 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4091 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4093 /* Compute a new r_index. */
4094 output_section
= h
->root
.u
.def
.section
->output_section
;
4095 if (output_section
== obj_textsec (output_bfd
))
4097 else if (output_section
== obj_datasec (output_bfd
))
4099 else if (output_section
== obj_bsssec (output_bfd
))
4104 /* Add the symbol value and the section VMA to the
4105 addend stored in the contents. */
4106 relocation
= (h
->root
.u
.def
.value
4107 + output_section
->vma
4108 + h
->root
.u
.def
.section
->output_offset
);
4112 /* We must change r_index according to the symbol
4114 r_index
= symbol_map
[r_index
];
4120 /* We decided to strip this symbol, but it
4121 turns out that we can't. Note that we
4122 lose the other and desc information here.
4123 I don't think that will ever matter for a
4129 if (!aout_link_write_other_symbol (&h
->root
.root
,
4139 name
= strings
+ GET_WORD (input_bfd
,
4140 syms
[r_index
].e_strx
);
4141 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4142 (flaginfo
->info
, name
,
4143 input_bfd
, input_section
, r_addr
);
4151 /* Write out the new r_index value. */
4152 if (bfd_header_big_endian (output_bfd
))
4154 rel
->r_index
[0] = r_index
>> 16;
4155 rel
->r_index
[1] = r_index
>> 8;
4156 rel
->r_index
[2] = r_index
;
4160 rel
->r_index
[2] = r_index
>> 16;
4161 rel
->r_index
[1] = r_index
>> 8;
4162 rel
->r_index
[0] = r_index
;
4169 /* This is a relocation against a section. We must
4170 adjust by the amount that the section moved. */
4171 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4172 relocation
= (section
->output_section
->vma
4173 + section
->output_offset
4177 /* Change the address of the relocation. */
4178 PUT_WORD (output_bfd
,
4179 r_addr
+ input_section
->output_offset
,
4182 /* Adjust a PC relative relocation by removing the reference
4183 to the original address in the section and including the
4184 reference to the new address. */
4186 relocation
-= (input_section
->output_section
->vma
4187 + input_section
->output_offset
4188 - input_section
->vma
);
4190 #ifdef MY_relocatable_reloc
4191 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4194 if (relocation
== 0)
4197 r
= MY_relocate_contents (howto
,
4198 input_bfd
, relocation
,
4205 /* We are generating an executable, and must do a full
4211 h
= sym_hashes
[r_index
];
4214 && (h
->root
.type
== bfd_link_hash_defined
4215 || h
->root
.type
== bfd_link_hash_defweak
))
4217 relocation
= (h
->root
.u
.def
.value
4218 + h
->root
.u
.def
.section
->output_section
->vma
4219 + h
->root
.u
.def
.section
->output_offset
);
4222 && h
->root
.type
== bfd_link_hash_undefweak
)
4234 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4235 relocation
= (section
->output_section
->vma
4236 + section
->output_offset
4239 relocation
+= input_section
->vma
;
4242 if (check_dynamic_reloc
!= NULL
)
4246 if (! ((*check_dynamic_reloc
)
4247 (flaginfo
->info
, input_bfd
, input_section
, h
,
4248 (void *) rel
, contents
, &skip
, &relocation
)))
4254 /* Now warn if a global symbol is undefined. We could not
4255 do this earlier, because check_dynamic_reloc might want
4256 to skip this reloc. */
4257 if (hundef
&& ! bfd_link_pic (flaginfo
->info
) && ! r_baserel
)
4262 name
= h
->root
.root
.string
;
4264 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4265 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4266 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4269 r
= MY_final_link_relocate (howto
,
4270 input_bfd
, input_section
,
4271 contents
, r_addr
, relocation
,
4275 if (r
!= bfd_reloc_ok
)
4280 case bfd_reloc_outofrange
:
4282 case bfd_reloc_overflow
:
4289 name
= strings
+ GET_WORD (input_bfd
,
4290 syms
[r_index
].e_strx
);
4295 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4296 name
= bfd_section_name (s
);
4298 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4299 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4300 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
4310 /* Relocate an a.out section using extended a.out relocs. */
4313 aout_link_input_section_ext (struct aout_final_link_info
*flaginfo
,
4315 asection
*input_section
,
4316 struct reloc_ext_external
*relocs
,
4317 bfd_size_type rel_size
,
4320 bfd_boolean (*check_dynamic_reloc
)
4321 (struct bfd_link_info
*, bfd
*, asection
*,
4322 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4325 bfd_boolean relocatable
;
4326 struct external_nlist
*syms
;
4328 struct aout_link_hash_entry
**sym_hashes
;
4330 bfd_size_type reloc_count
;
4331 struct reloc_ext_external
*rel
;
4332 struct reloc_ext_external
*rel_end
;
4334 output_bfd
= flaginfo
->output_bfd
;
4335 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4337 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4338 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4339 == output_bfd
->xvec
->header_byteorder
);
4341 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4342 syms
= obj_aout_external_syms (input_bfd
);
4343 strings
= obj_aout_external_strings (input_bfd
);
4344 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4345 symbol_map
= flaginfo
->symbol_map
;
4347 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4349 rel_end
= rel
+ reloc_count
;
4350 for (; rel
< rel_end
; rel
++)
4355 unsigned int r_type
;
4357 struct aout_link_hash_entry
*h
= NULL
;
4358 asection
*r_section
= NULL
;
4361 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4363 if (bfd_header_big_endian (input_bfd
))
4365 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4366 | ((unsigned int) rel
->r_index
[1] << 8)
4368 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4369 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4370 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4374 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4375 | ((unsigned int) rel
->r_index
[1] << 8)
4377 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4378 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4379 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4382 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4384 if (r_type
>= TABLE_SIZE (howto_table_ext
))
4386 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
4388 bfd_set_error (bfd_error_bad_value
);
4394 /* We are generating a relocatable output file, and must
4395 modify the reloc accordingly. */
4397 || r_type
== (unsigned int) RELOC_BASE10
4398 || r_type
== (unsigned int) RELOC_BASE13
4399 || r_type
== (unsigned int) RELOC_BASE22
)
4401 /* If we know the symbol this relocation is against,
4402 convert it into a relocation against a section. This
4403 is what the native linker does. */
4404 if (r_type
== (unsigned int) RELOC_BASE10
4405 || r_type
== (unsigned int) RELOC_BASE13
4406 || r_type
== (unsigned int) RELOC_BASE22
)
4409 h
= sym_hashes
[r_index
];
4411 && (h
->root
.type
== bfd_link_hash_defined
4412 || h
->root
.type
== bfd_link_hash_defweak
))
4414 asection
*output_section
;
4416 /* Change the r_extern value. */
4417 if (bfd_header_big_endian (output_bfd
))
4418 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4420 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4422 /* Compute a new r_index. */
4423 output_section
= h
->root
.u
.def
.section
->output_section
;
4424 if (output_section
== obj_textsec (output_bfd
))
4426 else if (output_section
== obj_datasec (output_bfd
))
4428 else if (output_section
== obj_bsssec (output_bfd
))
4433 /* Add the symbol value and the section VMA to the
4435 relocation
= (h
->root
.u
.def
.value
4436 + output_section
->vma
4437 + h
->root
.u
.def
.section
->output_offset
);
4439 /* Now RELOCATION is the VMA of the final
4440 destination. If this is a PC relative reloc,
4441 then ADDEND is the negative of the source VMA.
4442 We want to set ADDEND to the difference between
4443 the destination VMA and the source VMA, which
4444 means we must adjust RELOCATION by the change in
4445 the source VMA. This is done below. */
4449 /* We must change r_index according to the symbol
4451 r_index
= symbol_map
[r_index
];
4457 /* We decided to strip this symbol, but it
4458 turns out that we can't. Note that we
4459 lose the other and desc information here.
4460 I don't think that will ever matter for a
4466 if (!aout_link_write_other_symbol (&h
->root
.root
,
4476 name
= strings
+ GET_WORD (input_bfd
,
4477 syms
[r_index
].e_strx
);
4478 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4479 (flaginfo
->info
, name
,
4480 input_bfd
, input_section
, r_addr
);
4487 /* If this is a PC relative reloc, then the addend
4488 is the negative of the source VMA. We must
4489 adjust it by the change in the source VMA. This
4493 /* Write out the new r_index value. */
4494 if (bfd_header_big_endian (output_bfd
))
4496 rel
->r_index
[0] = r_index
>> 16;
4497 rel
->r_index
[1] = r_index
>> 8;
4498 rel
->r_index
[2] = r_index
;
4502 rel
->r_index
[2] = r_index
>> 16;
4503 rel
->r_index
[1] = r_index
>> 8;
4504 rel
->r_index
[0] = r_index
;
4509 /* This is a relocation against a section. We must
4510 adjust by the amount that the section moved. */
4511 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4512 relocation
= (r_section
->output_section
->vma
4513 + r_section
->output_offset
4516 /* If this is a PC relative reloc, then the addend is
4517 the difference in VMA between the destination and the
4518 source. We have just adjusted for the change in VMA
4519 of the destination, so we must also adjust by the
4520 change in VMA of the source. This is done below. */
4523 /* As described above, we must always adjust a PC relative
4524 reloc by the change in VMA of the source. However, if
4525 pcrel_offset is set, then the addend does not include the
4526 location within the section, in which case we don't need
4527 to adjust anything. */
4528 if (howto_table_ext
[r_type
].pc_relative
4529 && ! howto_table_ext
[r_type
].pcrel_offset
)
4530 relocation
-= (input_section
->output_section
->vma
4531 + input_section
->output_offset
4532 - input_section
->vma
);
4534 /* Change the addend if necessary. */
4535 if (relocation
!= 0)
4536 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4538 /* Change the address of the relocation. */
4539 PUT_WORD (output_bfd
,
4540 r_addr
+ input_section
->output_offset
,
4546 bfd_reloc_status_type r
;
4548 /* We are generating an executable, and must do a full
4554 h
= sym_hashes
[r_index
];
4557 && (h
->root
.type
== bfd_link_hash_defined
4558 || h
->root
.type
== bfd_link_hash_defweak
))
4560 relocation
= (h
->root
.u
.def
.value
4561 + h
->root
.u
.def
.section
->output_section
->vma
4562 + h
->root
.u
.def
.section
->output_offset
);
4565 && h
->root
.type
== bfd_link_hash_undefweak
)
4573 else if (r_type
== (unsigned int) RELOC_BASE10
4574 || r_type
== (unsigned int) RELOC_BASE13
4575 || r_type
== (unsigned int) RELOC_BASE22
)
4577 struct external_nlist
*sym
;
4580 /* For base relative relocs, r_index is always an index
4581 into the symbol table, even if r_extern is 0. */
4582 sym
= syms
+ r_index
;
4583 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4584 if ((type
& N_TYPE
) == N_TEXT
4586 r_section
= obj_textsec (input_bfd
);
4587 else if ((type
& N_TYPE
) == N_DATA
4589 r_section
= obj_datasec (input_bfd
);
4590 else if ((type
& N_TYPE
) == N_BSS
4592 r_section
= obj_bsssec (input_bfd
);
4593 else if ((type
& N_TYPE
) == N_ABS
4595 r_section
= bfd_abs_section_ptr
;
4598 relocation
= (r_section
->output_section
->vma
4599 + r_section
->output_offset
4600 + (GET_WORD (input_bfd
, sym
->e_value
)
4605 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4607 /* If this is a PC relative reloc, then R_ADDEND is the
4608 difference between the two vmas, or
4609 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4611 old_dest_sec == section->vma
4613 old_src_sec == input_section->vma
4615 old_src_off == r_addr
4617 _bfd_final_link_relocate expects RELOCATION +
4618 R_ADDEND to be the VMA of the destination minus
4619 r_addr (the minus r_addr is because this relocation
4620 is not pcrel_offset, which is a bit confusing and
4621 should, perhaps, be changed), or
4624 new_dest_sec == output_section->vma + output_offset
4625 We arrange for this to happen by setting RELOCATION to
4626 new_dest_sec + old_src_sec - old_dest_sec
4628 If this is not a PC relative reloc, then R_ADDEND is
4629 simply the VMA of the destination, so we set
4630 RELOCATION to the change in the destination VMA, or
4631 new_dest_sec - old_dest_sec
4633 relocation
= (r_section
->output_section
->vma
4634 + r_section
->output_offset
4636 if (howto_table_ext
[r_type
].pc_relative
)
4637 relocation
+= input_section
->vma
;
4640 if (check_dynamic_reloc
!= NULL
)
4644 if (! ((*check_dynamic_reloc
)
4645 (flaginfo
->info
, input_bfd
, input_section
, h
,
4646 (void *) rel
, contents
, &skip
, &relocation
)))
4652 /* Now warn if a global symbol is undefined. We could not
4653 do this earlier, because check_dynamic_reloc might want
4654 to skip this reloc. */
4656 && ! bfd_link_pic (flaginfo
->info
)
4657 && r_type
!= (unsigned int) RELOC_BASE10
4658 && r_type
!= (unsigned int) RELOC_BASE13
4659 && r_type
!= (unsigned int) RELOC_BASE22
)
4664 name
= h
->root
.root
.string
;
4666 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4667 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4668 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4671 if (r_type
!= (unsigned int) RELOC_SPARC_REV32
)
4672 r
= MY_final_link_relocate (howto_table_ext
+ r_type
,
4673 input_bfd
, input_section
,
4674 contents
, r_addr
, relocation
,
4680 x
= bfd_get_32 (input_bfd
, contents
+ r_addr
);
4681 x
= x
+ relocation
+ r_addend
;
4682 bfd_putl32 (/*input_bfd,*/ x
, contents
+ r_addr
);
4686 if (r
!= bfd_reloc_ok
)
4691 case bfd_reloc_outofrange
:
4693 case bfd_reloc_overflow
:
4700 || r_type
== (unsigned int) RELOC_BASE10
4701 || r_type
== (unsigned int) RELOC_BASE13
4702 || r_type
== (unsigned int) RELOC_BASE22
)
4703 name
= strings
+ GET_WORD (input_bfd
,
4704 syms
[r_index
].e_strx
);
4709 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4710 name
= bfd_section_name (s
);
4712 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4713 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
,
4714 howto_table_ext
[r_type
].name
,
4715 r_addend
, input_bfd
, input_section
, r_addr
);
4726 /* Link an a.out section into the output file. */
4729 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
4731 asection
*input_section
,
4732 file_ptr
*reloff_ptr
,
4733 bfd_size_type rel_size
)
4735 bfd_size_type input_size
;
4738 /* Get the section contents. */
4739 input_size
= input_section
->size
;
4740 if (! bfd_get_section_contents (input_bfd
, input_section
,
4741 (void *) flaginfo
->contents
,
4742 (file_ptr
) 0, input_size
))
4745 /* Read in the relocs if we haven't already done it. */
4746 if (aout_section_data (input_section
) != NULL
4747 && aout_section_data (input_section
)->relocs
!= NULL
)
4748 relocs
= aout_section_data (input_section
)->relocs
;
4751 relocs
= flaginfo
->relocs
;
4754 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4755 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
4760 /* Relocate the section contents. */
4761 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4763 if (! aout_link_input_section_std (flaginfo
, input_bfd
, input_section
,
4764 (struct reloc_std_external
*) relocs
,
4765 rel_size
, flaginfo
->contents
))
4770 if (! aout_link_input_section_ext (flaginfo
, input_bfd
, input_section
,
4771 (struct reloc_ext_external
*) relocs
,
4772 rel_size
, flaginfo
->contents
))
4776 /* Write out the section contents. */
4777 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
4778 input_section
->output_section
,
4779 (void *) flaginfo
->contents
,
4780 (file_ptr
) input_section
->output_offset
,
4784 /* If we are producing relocatable output, the relocs were
4785 modified, and we now write them out. */
4786 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
4788 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4790 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
4792 *reloff_ptr
+= rel_size
;
4794 /* Assert that the relocs have not run into the symbols, and
4795 that if these are the text relocs they have not run into the
4797 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
4798 && (reloff_ptr
!= &flaginfo
->treloff
4800 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
4806 /* Adjust and write out the symbols for an a.out file. Set the new
4807 symbol indices into a symbol_map. */
4810 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4813 bfd_size_type sym_count
;
4815 enum bfd_link_strip strip
;
4816 enum bfd_link_discard discard
;
4817 struct external_nlist
*outsym
;
4818 bfd_size_type strtab_index
;
4819 struct external_nlist
*sym
;
4820 struct external_nlist
*sym_end
;
4821 struct aout_link_hash_entry
**sym_hash
;
4824 bfd_boolean skip_next
;
4826 output_bfd
= flaginfo
->output_bfd
;
4827 sym_count
= obj_aout_external_sym_count (input_bfd
);
4828 strings
= obj_aout_external_strings (input_bfd
);
4829 strip
= flaginfo
->info
->strip
;
4830 discard
= flaginfo
->info
->discard
;
4831 outsym
= flaginfo
->output_syms
;
4833 /* First write out a symbol for this object file, unless we are
4834 discarding such symbols. */
4835 if (strip
!= strip_all
4836 && (strip
!= strip_some
4837 || bfd_hash_lookup (flaginfo
->info
->keep_hash
, input_bfd
->filename
,
4838 FALSE
, FALSE
) != NULL
)
4839 && discard
!= discard_all
)
4841 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4842 H_PUT_8 (output_bfd
, 0, outsym
->e_other
);
4843 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4844 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4845 input_bfd
->filename
, FALSE
);
4846 if (strtab_index
== (bfd_size_type
) -1)
4848 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4849 PUT_WORD (output_bfd
,
4850 (bfd_section_vma (obj_textsec (input_bfd
)->output_section
)
4851 + obj_textsec (input_bfd
)->output_offset
),
4853 ++obj_aout_external_sym_count (output_bfd
);
4859 sym
= obj_aout_external_syms (input_bfd
);
4860 sym_end
= sym
+ sym_count
;
4861 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4862 symbol_map
= flaginfo
->symbol_map
;
4863 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4864 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4868 struct aout_link_hash_entry
*h
;
4874 /* We set *symbol_map to 0 above for all symbols. If it has
4875 already been set to -1 for this symbol, it means that we are
4876 discarding it because it appears in a duplicate header file.
4877 See the N_BINCL code below. */
4878 if (*symbol_map
== -1)
4881 /* Initialize *symbol_map to -1, which means that the symbol was
4882 not copied into the output file. We will change it later if
4883 we do copy the symbol over. */
4886 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4887 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4893 /* Pass this symbol through. It is the target of an
4894 indirect or warning symbol. */
4895 val
= GET_WORD (input_bfd
, sym
->e_value
);
4900 /* Skip this symbol, which is the target of an indirect
4901 symbol that we have changed to no longer be an indirect
4908 struct aout_link_hash_entry
*hresolve
;
4910 /* We have saved the hash table entry for this symbol, if
4911 there is one. Note that we could just look it up again
4912 in the hash table, provided we first check that it is an
4916 /* Use the name from the hash table, in case the symbol was
4919 && h
->root
.type
!= bfd_link_hash_warning
)
4920 name
= h
->root
.root
.string
;
4922 /* If this is an indirect or warning symbol, then change
4923 hresolve to the base symbol. We also change *sym_hash so
4924 that the relocation routines relocate against the real
4927 if (h
!= (struct aout_link_hash_entry
*) NULL
4928 && (h
->root
.type
== bfd_link_hash_indirect
4929 || h
->root
.type
== bfd_link_hash_warning
))
4931 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4932 while (hresolve
->root
.type
== bfd_link_hash_indirect
4933 || hresolve
->root
.type
== bfd_link_hash_warning
)
4934 hresolve
= ((struct aout_link_hash_entry
*)
4935 hresolve
->root
.u
.i
.link
);
4936 *sym_hash
= hresolve
;
4939 /* If the symbol has already been written out, skip it. */
4943 if ((type
& N_TYPE
) == N_INDR
4944 || type
== N_WARNING
)
4946 *symbol_map
= h
->indx
;
4950 /* See if we are stripping this symbol. */
4956 case strip_debugger
:
4957 if ((type
& N_STAB
) != 0)
4961 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
4976 /* Get the value of the symbol. */
4977 if ((type
& N_TYPE
) == N_TEXT
4979 symsec
= obj_textsec (input_bfd
);
4980 else if ((type
& N_TYPE
) == N_DATA
4982 symsec
= obj_datasec (input_bfd
);
4983 else if ((type
& N_TYPE
) == N_BSS
4985 symsec
= obj_bsssec (input_bfd
);
4986 else if ((type
& N_TYPE
) == N_ABS
4988 symsec
= bfd_abs_section_ptr
;
4989 else if (((type
& N_TYPE
) == N_INDR
4990 && (hresolve
== NULL
4991 || (hresolve
->root
.type
!= bfd_link_hash_defined
4992 && hresolve
->root
.type
!= bfd_link_hash_defweak
4993 && hresolve
->root
.type
!= bfd_link_hash_common
)))
4994 || type
== N_WARNING
)
4996 /* Pass the next symbol through unchanged. The
4997 condition above for indirect symbols is so that if
4998 the indirect symbol was defined, we output it with
4999 the correct definition so the debugger will
5002 val
= GET_WORD (input_bfd
, sym
->e_value
);
5005 else if ((type
& N_STAB
) != 0)
5007 val
= GET_WORD (input_bfd
, sym
->e_value
);
5012 /* If we get here with an indirect symbol, it means that
5013 we are outputting it with a real definition. In such
5014 a case we do not want to output the next symbol,
5015 which is the target of the indirection. */
5016 if ((type
& N_TYPE
) == N_INDR
)
5021 /* We need to get the value from the hash table. We use
5022 hresolve so that if we have defined an indirect
5023 symbol we output the final definition. */
5026 switch (type
& N_TYPE
)
5029 symsec
= obj_textsec (input_bfd
);
5032 symsec
= obj_datasec (input_bfd
);
5035 symsec
= obj_bsssec (input_bfd
);
5038 symsec
= bfd_abs_section_ptr
;
5045 else if (hresolve
->root
.type
== bfd_link_hash_defined
5046 || hresolve
->root
.type
== bfd_link_hash_defweak
)
5048 asection
*input_section
;
5049 asection
*output_section
;
5051 /* This case usually means a common symbol which was
5052 turned into a defined symbol. */
5053 input_section
= hresolve
->root
.u
.def
.section
;
5054 output_section
= input_section
->output_section
;
5055 BFD_ASSERT (bfd_is_abs_section (output_section
)
5056 || output_section
->owner
== output_bfd
);
5057 val
= (hresolve
->root
.u
.def
.value
5058 + bfd_section_vma (output_section
)
5059 + input_section
->output_offset
);
5061 /* Get the correct type based on the section. If
5062 this is a constructed set, force it to be
5063 globally visible. */
5072 if (output_section
== obj_textsec (output_bfd
))
5073 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5076 else if (output_section
== obj_datasec (output_bfd
))
5077 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5080 else if (output_section
== obj_bsssec (output_bfd
))
5081 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5085 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5089 else if (hresolve
->root
.type
== bfd_link_hash_common
)
5090 val
= hresolve
->root
.u
.c
.size
;
5091 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
5100 val
= (symsec
->output_section
->vma
5101 + symsec
->output_offset
5102 + (GET_WORD (input_bfd
, sym
->e_value
)
5105 /* If this is a global symbol set the written flag, and if
5106 it is a local symbol see if we should discard it. */
5110 h
->indx
= obj_aout_external_sym_count (output_bfd
);
5112 else if ((type
& N_TYPE
) != N_SETT
5113 && (type
& N_TYPE
) != N_SETD
5114 && (type
& N_TYPE
) != N_SETB
5115 && (type
& N_TYPE
) != N_SETA
)
5120 case discard_sec_merge
:
5123 if ((type
& N_STAB
) == 0
5124 && bfd_is_local_label_name (input_bfd
, name
))
5138 /* An N_BINCL symbol indicates the start of the stabs
5139 entries for a header file. We need to scan ahead to the
5140 next N_EINCL symbol, ignoring nesting, adding up all the
5141 characters in the symbol names, not including the file
5142 numbers in types (the first number after an open
5144 if (type
== (int) N_BINCL
)
5146 struct external_nlist
*incl_sym
;
5148 struct aout_link_includes_entry
*incl_entry
;
5149 struct aout_link_includes_totals
*t
;
5153 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
5157 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5158 if (incl_type
== (int) N_EINCL
)
5164 else if (incl_type
== (int) N_BINCL
)
5170 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
5171 for (; *s
!= '\0'; s
++)
5176 /* Skip the file number. */
5178 while (ISDIGIT (*s
))
5186 /* If we have already included a header file with the
5187 same value, then replace this one with an N_EXCL
5189 copy
= (bfd_boolean
) (! flaginfo
->info
->keep_memory
);
5190 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
5192 if (incl_entry
== NULL
)
5194 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
5195 if (t
->total
== val
)
5199 /* This is the first time we have seen this header
5200 file with this set of stabs strings. */
5201 t
= (struct aout_link_includes_totals
*)
5202 bfd_hash_allocate (&flaginfo
->includes
.root
,
5207 t
->next
= incl_entry
->totals
;
5208 incl_entry
->totals
= t
;
5214 /* This is a duplicate header file. We must change
5215 it to be an N_EXCL entry, and mark all the
5216 included symbols to prevent outputting them. */
5217 type
= (int) N_EXCL
;
5220 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
5222 incl_sym
++, incl_map
++)
5226 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5227 if (incl_type
== (int) N_EINCL
)
5236 else if (incl_type
== (int) N_BINCL
)
5245 /* Copy this symbol into the list of symbols we are going to
5247 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
5248 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_other
), outsym
->e_other
);
5249 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
5251 if (! flaginfo
->info
->keep_memory
)
5253 /* name points into a string table which we are going to
5254 free. If there is a hash table entry, use that string.
5255 Otherwise, copy name into memory. */
5257 name
= h
->root
.root
.string
;
5261 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
5263 if (strtab_index
== (bfd_size_type
) -1)
5265 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
5266 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
5267 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
5268 ++obj_aout_external_sym_count (output_bfd
);
5272 /* Write out the output symbols we have just constructed. */
5273 if (outsym
> flaginfo
->output_syms
)
5275 bfd_size_type outsym_size
;
5277 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
5279 outsym_size
= outsym
- flaginfo
->output_syms
;
5280 outsym_size
*= EXTERNAL_NLIST_SIZE
;
5281 if (bfd_bwrite ((void *) flaginfo
->output_syms
, outsym_size
, output_bfd
)
5284 flaginfo
->symoff
+= outsym_size
;
5290 /* Link an a.out input BFD into the output file. */
5293 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
5295 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
5297 /* If this is a dynamic object, it may need special handling. */
5298 if ((input_bfd
->flags
& DYNAMIC
) != 0
5299 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
5300 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
5301 (flaginfo
->info
, input_bfd
));
5303 /* Get the symbols. We probably have them already, unless
5304 flaginfo->info->keep_memory is FALSE. */
5305 if (! aout_get_external_symbols (input_bfd
))
5308 /* Write out the symbols and get a map of the new indices. The map
5309 is placed into flaginfo->symbol_map. */
5310 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
5313 /* Relocate and write out the sections. These functions use the
5314 symbol map created by aout_link_write_symbols. The linker_mark
5315 field will be set if these sections are to be included in the
5316 link, which will normally be the case. */
5317 if (obj_textsec (input_bfd
)->linker_mark
)
5319 if (! aout_link_input_section (flaginfo
, input_bfd
,
5320 obj_textsec (input_bfd
),
5322 exec_hdr (input_bfd
)->a_trsize
))
5325 if (obj_datasec (input_bfd
)->linker_mark
)
5327 if (! aout_link_input_section (flaginfo
, input_bfd
,
5328 obj_datasec (input_bfd
),
5330 exec_hdr (input_bfd
)->a_drsize
))
5334 /* If we are not keeping memory, we don't need the symbols any
5335 longer. We still need them if we are keeping memory, because the
5336 strings in the hash table point into them. */
5337 if (! flaginfo
->info
->keep_memory
)
5339 if (! aout_link_free_symbols (input_bfd
))
5346 /* Do the final link step. This is called on the output BFD. The
5347 INFO structure should point to a list of BFDs linked through the
5348 link.next field which can be used to find each BFD which takes part
5349 in the output. Also, each section in ABFD should point to a list
5350 of bfd_link_order structures which list all the input sections for
5351 the output section. */
5354 NAME (aout
, final_link
) (bfd
*abfd
,
5355 struct bfd_link_info
*info
,
5356 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
5358 struct aout_final_link_info aout_info
;
5359 bfd_boolean includes_hash_initialized
= FALSE
;
5361 bfd_size_type trsize
, drsize
;
5362 bfd_size_type max_contents_size
;
5363 bfd_size_type max_relocs_size
;
5364 bfd_size_type max_sym_count
;
5365 struct bfd_link_order
*p
;
5367 bfd_boolean have_link_order_relocs
;
5369 if (bfd_link_pic (info
))
5370 abfd
->flags
|= DYNAMIC
;
5372 aout_info
.info
= info
;
5373 aout_info
.output_bfd
= abfd
;
5374 aout_info
.contents
= NULL
;
5375 aout_info
.relocs
= NULL
;
5376 aout_info
.symbol_map
= NULL
;
5377 aout_info
.output_syms
= NULL
;
5379 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
5380 aout_link_includes_newfunc
,
5381 sizeof (struct aout_link_includes_entry
),
5384 includes_hash_initialized
= TRUE
;
5386 /* Figure out the largest section size. Also, if generating
5387 relocatable output, count the relocs. */
5390 max_contents_size
= 0;
5391 max_relocs_size
= 0;
5393 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5397 if (bfd_link_relocatable (info
))
5399 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5401 trsize
+= exec_hdr (sub
)->a_trsize
;
5402 drsize
+= exec_hdr (sub
)->a_drsize
;
5406 /* FIXME: We need to identify the .text and .data sections
5407 and call get_reloc_upper_bound and canonicalize_reloc to
5408 work out the number of relocs needed, and then multiply
5409 by the reloc size. */
5411 /* xgettext:c-format */
5412 (_("%pB: relocatable link from %s to %s not supported"),
5413 abfd
, sub
->xvec
->name
, abfd
->xvec
->name
);
5414 bfd_set_error (bfd_error_invalid_operation
);
5419 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5421 sz
= obj_textsec (sub
)->size
;
5422 if (sz
> max_contents_size
)
5423 max_contents_size
= sz
;
5424 sz
= obj_datasec (sub
)->size
;
5425 if (sz
> max_contents_size
)
5426 max_contents_size
= sz
;
5428 sz
= exec_hdr (sub
)->a_trsize
;
5429 if (sz
> max_relocs_size
)
5430 max_relocs_size
= sz
;
5431 sz
= exec_hdr (sub
)->a_drsize
;
5432 if (sz
> max_relocs_size
)
5433 max_relocs_size
= sz
;
5435 sz
= obj_aout_external_sym_count (sub
);
5436 if (sz
> max_sym_count
)
5441 if (bfd_link_relocatable (info
))
5443 if (obj_textsec (abfd
) != NULL
)
5444 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
5445 ->map_head
.link_order
)
5446 * obj_reloc_entry_size (abfd
));
5447 if (obj_datasec (abfd
) != NULL
)
5448 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
5449 ->map_head
.link_order
)
5450 * obj_reloc_entry_size (abfd
));
5453 exec_hdr (abfd
)->a_trsize
= trsize
;
5454 exec_hdr (abfd
)->a_drsize
= drsize
;
5456 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
5458 /* Adjust the section sizes and vmas according to the magic number.
5459 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5460 filepos for each section. */
5461 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
5464 /* The relocation and symbol file positions differ among a.out
5465 targets. We are passed a callback routine from the backend
5466 specific code to handle this.
5467 FIXME: At this point we do not know how much space the symbol
5468 table will require. This will not work for any (nonstandard)
5469 a.out target that needs to know the symbol table size before it
5470 can compute the relocation file positions. */
5471 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
5473 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
5474 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
5475 obj_sym_filepos (abfd
) = aout_info
.symoff
;
5477 /* We keep a count of the symbols as we output them. */
5478 obj_aout_external_sym_count (abfd
) = 0;
5480 /* We accumulate the string table as we write out the symbols. */
5481 aout_info
.strtab
= _bfd_stringtab_init ();
5482 if (aout_info
.strtab
== NULL
)
5485 /* Allocate buffers to hold section contents and relocs. */
5486 aout_info
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5487 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
5488 aout_info
.symbol_map
= (int *) bfd_malloc (max_sym_count
* sizeof (int));
5489 aout_info
.output_syms
= (struct external_nlist
*)
5490 bfd_malloc ((max_sym_count
+ 1) * sizeof (struct external_nlist
));
5491 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
5492 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
5493 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
5494 || aout_info
.output_syms
== NULL
)
5497 /* If we have a symbol named __DYNAMIC, force it out now. This is
5498 required by SunOS. Doing this here rather than in sunos.c is a
5499 hack, but it's easier than exporting everything which would be
5502 struct aout_link_hash_entry
*h
;
5504 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
5505 FALSE
, FALSE
, FALSE
);
5507 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
5510 /* The most time efficient way to do the link would be to read all
5511 the input object files into memory and then sort out the
5512 information into the output file. Unfortunately, that will
5513 probably use too much memory. Another method would be to step
5514 through everything that composes the text section and write it
5515 out, and then everything that composes the data section and write
5516 it out, and then write out the relocs, and then write out the
5517 symbols. Unfortunately, that requires reading stuff from each
5518 input file several times, and we will not be able to keep all the
5519 input files open simultaneously, and reopening them will be slow.
5521 What we do is basically process one input file at a time. We do
5522 everything we need to do with an input file once--copy over the
5523 section contents, handle the relocation information, and write
5524 out the symbols--and then we throw away the information we read
5525 from it. This approach requires a lot of lseeks of the output
5526 file, which is unfortunate but still faster than reopening a lot
5529 We use the output_has_begun field of the input BFDs to see
5530 whether we have already handled it. */
5531 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5532 sub
->output_has_begun
= FALSE
;
5534 /* Mark all sections which are to be included in the link. This
5535 will normally be every section. We need to do this so that we
5536 can identify any sections which the linker has decided to not
5538 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5540 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5541 if (p
->type
== bfd_indirect_link_order
)
5542 p
->u
.indirect
.section
->linker_mark
= TRUE
;
5545 have_link_order_relocs
= FALSE
;
5546 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5548 for (p
= o
->map_head
.link_order
;
5552 if (p
->type
== bfd_indirect_link_order
5553 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
5554 == bfd_target_aout_flavour
))
5558 input_bfd
= p
->u
.indirect
.section
->owner
;
5559 if (! input_bfd
->output_has_begun
)
5561 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
5563 input_bfd
->output_has_begun
= TRUE
;
5566 else if (p
->type
== bfd_section_reloc_link_order
5567 || p
->type
== bfd_symbol_reloc_link_order
)
5569 /* These are handled below. */
5570 have_link_order_relocs
= TRUE
;
5574 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5580 /* Write out any symbols that we have not already written out. */
5581 bfd_hash_traverse (&info
->hash
->table
,
5582 aout_link_write_other_symbol
,
5585 /* Now handle any relocs we were asked to create by the linker.
5586 These did not come from any input file. We must do these after
5587 we have written out all the symbols, so that we know the symbol
5589 if (have_link_order_relocs
)
5591 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5593 for (p
= o
->map_head
.link_order
;
5597 if (p
->type
== bfd_section_reloc_link_order
5598 || p
->type
== bfd_symbol_reloc_link_order
)
5600 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
5607 if (aout_info
.contents
!= NULL
)
5609 free (aout_info
.contents
);
5610 aout_info
.contents
= NULL
;
5612 if (aout_info
.relocs
!= NULL
)
5614 free (aout_info
.relocs
);
5615 aout_info
.relocs
= NULL
;
5617 if (aout_info
.symbol_map
!= NULL
)
5619 free (aout_info
.symbol_map
);
5620 aout_info
.symbol_map
= NULL
;
5622 if (aout_info
.output_syms
!= NULL
)
5624 free (aout_info
.output_syms
);
5625 aout_info
.output_syms
= NULL
;
5627 if (includes_hash_initialized
)
5629 bfd_hash_table_free (&aout_info
.includes
.root
);
5630 includes_hash_initialized
= FALSE
;
5633 /* Finish up any dynamic linking we may be doing. */
5634 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
5636 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
5640 /* Update the header information. */
5641 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
5642 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
5643 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
5644 obj_textsec (abfd
)->reloc_count
=
5645 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
5646 obj_datasec (abfd
)->reloc_count
=
5647 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
5649 /* Write out the string table, unless there are no symbols. */
5650 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
5652 if (abfd
->symcount
> 0)
5654 if (!emit_stringtab (abfd
, aout_info
.strtab
))
5659 bfd_byte b
[BYTES_IN_WORD
];
5661 memset (b
, 0, BYTES_IN_WORD
);
5662 if (bfd_bwrite (b
, (bfd_size_type
) BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
5669 if (aout_info
.contents
!= NULL
)
5670 free (aout_info
.contents
);
5671 if (aout_info
.relocs
!= NULL
)
5672 free (aout_info
.relocs
);
5673 if (aout_info
.symbol_map
!= NULL
)
5674 free (aout_info
.symbol_map
);
5675 if (aout_info
.output_syms
!= NULL
)
5676 free (aout_info
.output_syms
);
5677 if (includes_hash_initialized
)
5678 bfd_hash_table_free (&aout_info
.includes
.root
);