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 switch (bfd_get_reloc_size (g
->howto
))
1952 _bfd_error_handler (_("%pB: unsupported AOUT relocation size: %d"),
1953 abfd
, bfd_get_reloc_size (g
->howto
));
1954 bfd_set_error (bfd_error_bad_value
);
1959 r_length
= g
->howto
->size
; /* Size as a power of two. */
1966 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1967 /* XXX This relies on relocs coming from a.out files. */
1968 r_baserel
= (g
->howto
->type
& 8) != 0;
1969 r_jmptable
= (g
->howto
->type
& 16) != 0;
1970 r_relative
= (g
->howto
->type
& 32) != 0;
1972 /* Name was clobbered by aout_write_syms to be symbol index. */
1974 /* If this relocation is relative to a symbol then set the
1975 r_index to the symbols index, and the r_extern bit.
1977 Absolute symbols can come in in two ways, either as an offset
1978 from the abs section, or as a symbol which has an abs value.
1979 check for that here. */
1981 if (bfd_is_com_section (output_section
)
1982 || bfd_is_abs_section (output_section
)
1983 || bfd_is_und_section (output_section
)
1984 /* PR gas/3041 a.out relocs against weak symbols
1985 must be treated as if they were against externs. */
1986 || (sym
->flags
& BSF_WEAK
))
1988 if (bfd_abs_section_ptr
->symbol
== sym
)
1990 /* Whoops, looked like an abs symbol, but is
1991 really an offset from the abs section. */
1997 /* Fill in symbol. */
1999 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2004 /* Just an ordinary section. */
2006 r_index
= output_section
->target_index
;
2009 /* Now the fun stuff. */
2010 if (bfd_header_big_endian (abfd
))
2012 natptr
->r_index
[0] = r_index
>> 16;
2013 natptr
->r_index
[1] = r_index
>> 8;
2014 natptr
->r_index
[2] = r_index
;
2015 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2016 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2017 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2018 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2019 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2020 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
2024 natptr
->r_index
[2] = r_index
>> 16;
2025 natptr
->r_index
[1] = r_index
>> 8;
2026 natptr
->r_index
[0] = r_index
;
2027 natptr
->r_type
[0] = ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2028 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2029 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2030 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2031 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2032 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
2036 /* Extended stuff. */
2037 /* Output extended relocation information to a file in target byte order. */
2039 extern void NAME (aout
, swap_ext_reloc_out
)
2040 (bfd
*, arelent
*, struct reloc_ext_external
*);
2043 NAME (aout
, swap_ext_reloc_out
) (bfd
*abfd
,
2045 struct reloc_ext_external
*natptr
)
2049 unsigned int r_type
;
2051 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2052 asection
*output_section
= sym
->section
->output_section
;
2054 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2056 r_type
= (unsigned int) g
->howto
->type
;
2058 r_addend
= g
->addend
;
2059 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2060 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2062 /* If this relocation is relative to a symbol then set the
2063 r_index to the symbols index, and the r_extern bit.
2065 Absolute symbols can come in in two ways, either as an offset
2066 from the abs section, or as a symbol which has an abs value.
2067 check for that here. */
2068 if (bfd_is_abs_section (bfd_asymbol_section (sym
)))
2073 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2075 if (bfd_is_und_section (bfd_asymbol_section (sym
))
2076 || (sym
->flags
& BSF_GLOBAL
) != 0)
2080 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2084 /* Just an ordinary section. */
2086 r_index
= output_section
->target_index
;
2089 /* Now the fun stuff. */
2090 if (bfd_header_big_endian (abfd
))
2092 natptr
->r_index
[0] = r_index
>> 16;
2093 natptr
->r_index
[1] = r_index
>> 8;
2094 natptr
->r_index
[2] = r_index
;
2095 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2096 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2100 natptr
->r_index
[2] = r_index
>> 16;
2101 natptr
->r_index
[1] = r_index
>> 8;
2102 natptr
->r_index
[0] = r_index
;
2103 natptr
->r_type
[0] = ((r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2104 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
));
2107 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2110 /* BFD deals internally with all things based from the section they're
2111 in. so, something in 10 bytes into a text section with a base of
2112 50 would have a symbol (.text+10) and know .text vma was 50.
2114 Aout keeps all it's symbols based from zero, so the symbol would
2115 contain 60. This macro subs the base of each section from the value
2116 to give the true offset from the section. */
2118 #define MOVE_ADDRESS(ad) \
2121 /* Undefined symbol. */ \
2122 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2123 cache_ptr->addend = ad; \
2127 /* Defined, section relative. Replace symbol with pointer to \
2128 symbol which points to section. */ \
2132 case N_TEXT | N_EXT: \
2133 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
2134 cache_ptr->addend = ad - su->textsec->vma; \
2137 case N_DATA | N_EXT: \
2138 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
2139 cache_ptr->addend = ad - su->datasec->vma; \
2142 case N_BSS | N_EXT: \
2143 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
2144 cache_ptr->addend = ad - su->bsssec->vma; \
2148 case N_ABS | N_EXT: \
2149 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2150 cache_ptr->addend = ad; \
2156 NAME (aout
, swap_ext_reloc_in
) (bfd
*abfd
,
2157 struct reloc_ext_external
*bytes
,
2160 bfd_size_type symcount
)
2162 unsigned int r_index
;
2164 unsigned int r_type
;
2165 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2167 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2169 /* Now the fun stuff. */
2170 if (bfd_header_big_endian (abfd
))
2172 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2173 | ((unsigned int) bytes
->r_index
[1] << 8)
2174 | bytes
->r_index
[2]);
2175 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2176 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2177 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
2181 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2182 | ((unsigned int) bytes
->r_index
[1] << 8)
2183 | bytes
->r_index
[0]);
2184 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2185 r_type
= ((bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2186 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2189 if (r_type
< TABLE_SIZE (howto_table_ext
))
2190 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2192 cache_ptr
->howto
= NULL
;
2194 /* Base relative relocs are always against the symbol table,
2195 regardless of the setting of r_extern. r_extern just reflects
2196 whether the symbol the reloc is against is local or global. */
2197 if (r_type
== (unsigned int) RELOC_BASE10
2198 || r_type
== (unsigned int) RELOC_BASE13
2199 || r_type
== (unsigned int) RELOC_BASE22
)
2202 if (r_extern
&& r_index
> symcount
)
2204 /* We could arrange to return an error, but it might be useful
2205 to see the file even if it is bad. */
2210 MOVE_ADDRESS (GET_SWORD (abfd
, bytes
->r_addend
));
2214 NAME (aout
, swap_std_reloc_in
) (bfd
*abfd
,
2215 struct reloc_std_external
*bytes
,
2218 bfd_size_type symcount
)
2220 unsigned int r_index
;
2222 unsigned int r_length
;
2224 int r_baserel
, r_jmptable
, r_relative
;
2225 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2226 unsigned int howto_idx
;
2228 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
2230 /* Now the fun stuff. */
2231 if (bfd_header_big_endian (abfd
))
2233 r_index
= (((unsigned int) bytes
->r_index
[0] << 16)
2234 | ((unsigned int) bytes
->r_index
[1] << 8)
2235 | bytes
->r_index
[2]);
2236 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2237 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2238 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2239 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2240 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2241 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2242 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
2246 r_index
= (((unsigned int) bytes
->r_index
[2] << 16)
2247 | ((unsigned int) bytes
->r_index
[1] << 8)
2248 | bytes
->r_index
[0]);
2249 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2250 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2251 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2252 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2253 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2254 r_length
= ((bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2255 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2258 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2259 + 16 * r_jmptable
+ 32 * r_relative
);
2260 if (howto_idx
< TABLE_SIZE (howto_table_std
))
2262 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2263 if (cache_ptr
->howto
->type
== (unsigned int) -1)
2264 cache_ptr
->howto
= NULL
;
2267 cache_ptr
->howto
= NULL
;
2269 /* Base relative relocs are always against the symbol table,
2270 regardless of the setting of r_extern. r_extern just reflects
2271 whether the symbol the reloc is against is local or global. */
2275 if (r_extern
&& r_index
>= symcount
)
2277 /* We could arrange to return an error, but it might be useful
2278 to see the file even if it is bad. FIXME: Of course this
2279 means that objdump -r *doesn't* see the actual reloc, and
2280 objcopy silently writes a different reloc. */
2288 /* Read and swap the relocs for a section. */
2291 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
2293 bfd_size_type count
;
2294 bfd_size_type reloc_size
;
2296 arelent
*reloc_cache
;
2298 unsigned int counter
= 0;
2302 if (asect
->relocation
)
2305 if (asect
->flags
& SEC_CONSTRUCTOR
)
2308 if (asect
== obj_datasec (abfd
))
2309 reloc_size
= exec_hdr (abfd
)->a_drsize
;
2310 else if (asect
== obj_textsec (abfd
))
2311 reloc_size
= exec_hdr (abfd
)->a_trsize
;
2312 else if (asect
== obj_bsssec (abfd
))
2316 bfd_set_error (bfd_error_invalid_operation
);
2320 each_size
= obj_reloc_entry_size (abfd
);
2321 count
= reloc_size
/ each_size
;
2323 return TRUE
; /* Nothing to be done. */
2325 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2327 relocs
= _bfd_malloc_and_read (abfd
, reloc_size
, reloc_size
);
2331 amt
= count
* sizeof (arelent
);
2332 reloc_cache
= (arelent
*) bfd_zmalloc (amt
);
2333 if (reloc_cache
== NULL
)
2339 cache_ptr
= reloc_cache
;
2340 if (each_size
== RELOC_EXT_SIZE
)
2342 struct reloc_ext_external
*rptr
= (struct reloc_ext_external
*) relocs
;
2344 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2345 MY_swap_ext_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2346 (bfd_size_type
) bfd_get_symcount (abfd
));
2350 struct reloc_std_external
*rptr
= (struct reloc_std_external
*) relocs
;
2352 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2353 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2354 (bfd_size_type
) bfd_get_symcount (abfd
));
2359 asect
->relocation
= reloc_cache
;
2360 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2365 /* Write out a relocation section into an object file. */
2368 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2371 unsigned char *native
, *natptr
;
2374 unsigned int count
= section
->reloc_count
;
2375 bfd_size_type natsize
;
2377 if (count
== 0 || section
->orelocation
== NULL
)
2380 each_size
= obj_reloc_entry_size (abfd
);
2381 natsize
= (bfd_size_type
) each_size
* count
;
2382 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2386 generic
= section
->orelocation
;
2388 if (each_size
== RELOC_EXT_SIZE
)
2390 for (natptr
= native
;
2392 --count
, natptr
+= each_size
, ++generic
)
2394 /* PR 20921: If the howto field has not been initialised then skip
2396 PR 20929: Similarly for the symbol field. */
2397 if ((*generic
)->howto
== NULL
2398 || (*generic
)->sym_ptr_ptr
== NULL
)
2400 bfd_set_error (bfd_error_invalid_operation
);
2401 _bfd_error_handler (_("%pB: attempt to write out "
2402 "unknown reloc type"), abfd
);
2405 MY_swap_ext_reloc_out (abfd
, *generic
,
2406 (struct reloc_ext_external
*) natptr
);
2411 for (natptr
= native
;
2413 --count
, natptr
+= each_size
, ++generic
)
2415 if ((*generic
)->howto
== NULL
2416 || (*generic
)->sym_ptr_ptr
== NULL
)
2418 bfd_set_error (bfd_error_invalid_operation
);
2419 _bfd_error_handler (_("%pB: attempt to write out "
2420 "unknown reloc type"), abfd
);
2423 MY_swap_std_reloc_out (abfd
, *generic
,
2424 (struct reloc_std_external
*) natptr
);
2428 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2430 bfd_release (abfd
, native
);
2433 bfd_release (abfd
, native
);
2438 /* This is stupid. This function should be a boolean predicate. */
2441 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2446 arelent
*tblptr
= section
->relocation
;
2449 if (section
== obj_bsssec (abfd
))
2455 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
) (abfd
, section
, symbols
)))
2458 if (section
->flags
& SEC_CONSTRUCTOR
)
2460 arelent_chain
*chain
= section
->constructor_chain
;
2461 for (count
= 0; count
< section
->reloc_count
; count
++)
2463 *relptr
++ = &chain
->relent
;
2464 chain
= chain
->next
;
2469 tblptr
= section
->relocation
;
2471 for (count
= 0; count
++ < section
->reloc_count
; )
2473 *relptr
++ = tblptr
++;
2478 return section
->reloc_count
;
2482 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2484 bfd_size_type count
;
2486 if (bfd_get_format (abfd
) != bfd_object
)
2488 bfd_set_error (bfd_error_invalid_operation
);
2492 if (asect
->flags
& SEC_CONSTRUCTOR
)
2493 count
= asect
->reloc_count
;
2494 else if (asect
== obj_datasec (abfd
))
2495 count
= exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
2496 else if (asect
== obj_textsec (abfd
))
2497 count
= exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
2498 else if (asect
== obj_bsssec (abfd
))
2502 bfd_set_error (bfd_error_invalid_operation
);
2506 if (count
>= LONG_MAX
/ sizeof (arelent
*))
2508 bfd_set_error (bfd_error_file_too_big
);
2511 return (count
+ 1) * sizeof (arelent
*);
2515 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2517 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2520 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2524 NAME (aout
, get_lineno
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2525 asymbol
*ignore_symbol ATTRIBUTE_UNUSED
)
2531 NAME (aout
, get_symbol_info
) (bfd
*ignore_abfd ATTRIBUTE_UNUSED
,
2535 bfd_symbol_info (symbol
, ret
);
2537 if (ret
->type
== '?')
2539 int type_code
= aout_symbol (symbol
)->type
& 0xff;
2540 const char *stab_name
= bfd_get_stab_name (type_code
);
2541 static char buf
[10];
2543 if (stab_name
== NULL
)
2545 sprintf (buf
, "(%d)", type_code
);
2549 ret
->stab_type
= type_code
;
2550 ret
->stab_other
= (unsigned) (aout_symbol (symbol
)->other
& 0xff);
2551 ret
->stab_desc
= (unsigned) (aout_symbol (symbol
)->desc
& 0xffff);
2552 ret
->stab_name
= stab_name
;
2557 NAME (aout
, print_symbol
) (bfd
*abfd
,
2560 bfd_print_symbol_type how
)
2562 FILE *file
= (FILE *)afile
;
2566 case bfd_print_symbol_name
:
2568 fprintf (file
,"%s", symbol
->name
);
2570 case bfd_print_symbol_more
:
2571 fprintf (file
,"%4x %2x %2x",
2572 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2573 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2574 (unsigned) (aout_symbol (symbol
)->type
));
2576 case bfd_print_symbol_all
:
2578 const char *section_name
= symbol
->section
->name
;
2580 bfd_print_symbol_vandf (abfd
, (void *)file
, symbol
);
2582 fprintf (file
," %-5s %04x %02x %02x",
2584 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2585 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2586 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2588 fprintf (file
," %s", symbol
->name
);
2594 /* If we don't have to allocate more than 1MB to hold the generic
2595 symbols, we use the generic minisymbol methord: it's faster, since
2596 it only translates the symbols once, not multiple times. */
2597 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2599 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2600 symbols. The minisymbol_to_symbol function translates these into
2601 BFD asymbol structures. */
2604 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2605 bfd_boolean dynamic
,
2607 unsigned int *sizep
)
2610 /* We could handle the dynamic symbols here as well, but it's
2611 easier to hand them off. */
2612 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2614 if (! aout_get_external_symbols (abfd
))
2617 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2618 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2620 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2622 /* By passing the external symbols back from this routine, we are
2623 giving up control over the memory block. Clear
2624 obj_aout_external_syms, so that we do not try to free it
2626 obj_aout_external_syms (abfd
) = NULL
;
2628 *sizep
= EXTERNAL_NLIST_SIZE
;
2629 return obj_aout_external_sym_count (abfd
);
2632 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2633 unmodified a.out symbol. The SYM argument is a structure returned
2634 by bfd_make_empty_symbol, which we fill in here. */
2637 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2638 bfd_boolean dynamic
,
2639 const void * minisym
,
2643 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2644 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2646 memset (sym
, 0, sizeof (aout_symbol_type
));
2648 /* We call translate_symbol_table to translate a single symbol. */
2649 if (! (NAME (aout
, translate_symbol_table
)
2651 (aout_symbol_type
*) sym
,
2652 (struct external_nlist
*) minisym
,
2654 obj_aout_external_strings (abfd
),
2655 obj_aout_external_string_size (abfd
),
2662 /* Provided a BFD, a section and an offset into the section, calculate
2663 and return the name of the source file and the line nearest to the
2667 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2671 const char **filename_ptr
,
2672 const char **functionname_ptr
,
2673 unsigned int *line_ptr
,
2674 unsigned int *disriminator_ptr
)
2676 /* Run down the file looking for the filename, function and linenumber. */
2678 const char *directory_name
= NULL
;
2679 const char *main_file_name
= NULL
;
2680 const char *current_file_name
= NULL
;
2681 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2682 const char *line_directory_name
= NULL
; /* Value of directory_name at line number. */
2683 bfd_vma low_line_vma
= 0;
2684 bfd_vma low_func_vma
= 0;
2686 bfd_size_type filelen
, funclen
;
2689 *filename_ptr
= bfd_get_filename (abfd
);
2690 *functionname_ptr
= NULL
;
2692 if (disriminator_ptr
)
2693 *disriminator_ptr
= 0;
2695 if (symbols
!= NULL
)
2697 for (p
= symbols
; *p
; p
++)
2699 aout_symbol_type
*q
= (aout_symbol_type
*) (*p
);
2704 /* If this looks like a file name symbol, and it comes after
2705 the line number we have found so far, but before the
2706 offset, then we have probably not found the right line
2708 if (q
->symbol
.value
<= offset
2709 && ((q
->symbol
.value
> low_line_vma
2710 && (line_file_name
!= NULL
2712 || (q
->symbol
.value
> low_func_vma
2715 const char *symname
;
2717 symname
= q
->symbol
.name
;
2720 && strlen (symname
) > 2
2721 && strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2723 if (q
->symbol
.value
> low_line_vma
)
2726 line_file_name
= NULL
;
2728 if (q
->symbol
.value
> low_func_vma
)
2735 /* If this symbol is less than the offset, but greater than
2736 the line number we have found so far, then we have not
2737 found the right line number. */
2738 if (q
->symbol
.value
<= offset
)
2740 if (q
->symbol
.value
> low_line_vma
)
2743 line_file_name
= NULL
;
2745 if (q
->symbol
.value
> low_func_vma
)
2749 main_file_name
= current_file_name
= q
->symbol
.name
;
2750 /* Look ahead to next symbol to check if that too is an N_SO. */
2754 q
= (aout_symbol_type
*) (*p
);
2755 if (q
->type
!= (int)N_SO
)
2758 /* Found a second N_SO First is directory; second is filename. */
2759 directory_name
= current_file_name
;
2760 main_file_name
= current_file_name
= q
->symbol
.name
;
2761 if (obj_textsec (abfd
) != section
)
2765 current_file_name
= q
->symbol
.name
;
2772 /* We'll keep this if it resolves nearer than the one we have
2774 if (q
->symbol
.value
>= low_line_vma
2775 && q
->symbol
.value
<= offset
)
2777 *line_ptr
= q
->desc
;
2778 low_line_vma
= q
->symbol
.value
;
2779 line_file_name
= current_file_name
;
2780 line_directory_name
= directory_name
;
2785 /* We'll keep this if it is nearer than the one we have already. */
2786 if (q
->symbol
.value
>= low_func_vma
2787 && q
->symbol
.value
<= offset
)
2789 low_func_vma
= q
->symbol
.value
;
2790 func
= (asymbol
*)q
;
2792 else if (q
->symbol
.value
> offset
)
2803 main_file_name
= line_file_name
;
2804 directory_name
= line_directory_name
;
2807 if (main_file_name
== NULL
2808 || IS_ABSOLUTE_PATH (main_file_name
)
2809 || directory_name
== NULL
)
2812 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2817 funclen
= strlen (bfd_asymbol_name (func
));
2819 if (adata (abfd
).line_buf
!= NULL
)
2820 free (adata (abfd
).line_buf
);
2822 if (filelen
+ funclen
== 0)
2823 adata (abfd
).line_buf
= buf
= NULL
;
2826 buf
= (char *) bfd_malloc (filelen
+ funclen
+ 3);
2827 adata (abfd
).line_buf
= buf
;
2832 if (main_file_name
!= NULL
)
2834 if (IS_ABSOLUTE_PATH (main_file_name
) || directory_name
== NULL
)
2835 *filename_ptr
= main_file_name
;
2839 /* PR binutils/20891: In a corrupt input file both
2840 main_file_name and directory_name can be empty... */
2841 * filename_ptr
= NULL
;
2844 snprintf (buf
, filelen
+ 1, "%s%s", directory_name
,
2846 *filename_ptr
= buf
;
2854 const char *function
= func
->name
;
2859 /* PR binutils/20892: In a corrupt input file func can be empty. */
2860 * functionname_ptr
= NULL
;
2863 /* The caller expects a symbol name. We actually have a
2864 function name, without the leading underscore. Put the
2865 underscore back in, so that the caller gets a symbol name. */
2866 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2867 strcpy (buf
, function
);
2870 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2871 strcpy (buf
+ 1, function
);
2873 /* Have to remove : stuff. */
2874 colon
= strchr (buf
, ':');
2877 *functionname_ptr
= buf
;
2884 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2885 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2887 return adata (abfd
).exec_bytes_size
;
2890 /* Free all information we have cached for this BFD. We can always
2891 read it again later if we need it. */
2894 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2898 if (bfd_get_format (abfd
) != bfd_object
2899 || abfd
->tdata
.aout_data
== NULL
)
2902 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2903 BFCI_FREE (obj_aout_symbols (abfd
));
2905 obj_aout_external_syms (abfd
) = 0;
2906 bfd_free_window (&obj_aout_sym_window (abfd
));
2907 bfd_free_window (&obj_aout_string_window (abfd
));
2908 obj_aout_external_strings (abfd
) = 0;
2910 BFCI_FREE (obj_aout_external_syms (abfd
));
2911 BFCI_FREE (obj_aout_external_strings (abfd
));
2913 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2914 BFCI_FREE (o
->relocation
);
2920 /* a.out link code. */
2922 /* Routine to create an entry in an a.out link hash table. */
2924 struct bfd_hash_entry
*
2925 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2926 struct bfd_hash_table
*table
,
2929 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2931 /* Allocate the structure if it has not already been allocated by a
2934 ret
= (struct aout_link_hash_entry
*) bfd_hash_allocate (table
,
2939 /* Call the allocation method of the superclass. */
2940 ret
= ((struct aout_link_hash_entry
*)
2941 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2945 /* Set local fields. */
2946 ret
->written
= FALSE
;
2950 return (struct bfd_hash_entry
*) ret
;
2953 /* Initialize an a.out link hash table. */
2956 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2958 struct bfd_hash_entry
*(*newfunc
)
2959 (struct bfd_hash_entry
*, struct bfd_hash_table
*,
2961 unsigned int entsize
)
2963 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2966 /* Create an a.out link hash table. */
2968 struct bfd_link_hash_table
*
2969 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2971 struct aout_link_hash_table
*ret
;
2972 size_t amt
= sizeof (* ret
);
2974 ret
= (struct aout_link_hash_table
*) bfd_malloc (amt
);
2978 if (!NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2979 NAME (aout
, link_hash_newfunc
),
2980 sizeof (struct aout_link_hash_entry
)))
2988 /* Add all symbols from an object file to the hash table. */
2991 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2993 bfd_boolean (*add_one_symbol
)
2994 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
2995 bfd_vma
, const char *, bfd_boolean
, bfd_boolean
,
2996 struct bfd_link_hash_entry
**);
2997 struct external_nlist
*syms
;
2998 bfd_size_type sym_count
;
3001 struct aout_link_hash_entry
**sym_hash
;
3002 struct external_nlist
*p
;
3003 struct external_nlist
*pend
;
3006 syms
= obj_aout_external_syms (abfd
);
3007 sym_count
= obj_aout_external_sym_count (abfd
);
3008 strings
= obj_aout_external_strings (abfd
);
3009 if (info
->keep_memory
)
3014 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
3016 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
3017 (abfd
, info
, &syms
, &sym_count
, &strings
)))
3022 return TRUE
; /* Nothing to do. */
3024 /* We keep a list of the linker hash table entries that correspond
3025 to particular symbols. We could just look them up in the hash
3026 table, but keeping the list is more efficient. Perhaps this
3027 should be conditional on info->keep_memory. */
3028 amt
= sym_count
* sizeof (struct aout_link_hash_entry
*);
3029 sym_hash
= (struct aout_link_hash_entry
**) bfd_alloc (abfd
, amt
);
3030 if (sym_hash
== NULL
)
3032 obj_aout_sym_hashes (abfd
) = sym_hash
;
3034 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
3035 if (add_one_symbol
== NULL
)
3036 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
3039 pend
= p
+ sym_count
;
3040 for (; p
< pend
; p
++, sym_hash
++)
3051 type
= H_GET_8 (abfd
, p
->e_type
);
3053 /* Ignore debugging symbols. */
3054 if ((type
& N_STAB
) != 0)
3057 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3058 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3060 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3061 value
= GET_WORD (abfd
, p
->e_value
);
3078 /* Ignore symbols that are not externally visible. */
3081 /* Ignore local indirect symbol. */
3086 case N_UNDF
| N_EXT
:
3089 section
= bfd_und_section_ptr
;
3093 section
= bfd_com_section_ptr
;
3096 section
= bfd_abs_section_ptr
;
3098 case N_TEXT
| N_EXT
:
3099 section
= obj_textsec (abfd
);
3100 value
-= bfd_section_vma (section
);
3102 case N_DATA
| N_EXT
:
3103 case N_SETV
| N_EXT
:
3104 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3105 translate_from_native_sym_flags. */
3106 section
= obj_datasec (abfd
);
3107 value
-= bfd_section_vma (section
);
3110 section
= obj_bsssec (abfd
);
3111 value
-= bfd_section_vma (section
);
3113 case N_INDR
| N_EXT
:
3114 /* An indirect symbol. The next symbol is the symbol
3115 which this one really is. */
3116 /* See PR 20925 for a reproducer. */
3120 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3121 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3123 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3124 section
= bfd_ind_section_ptr
;
3125 flags
|= BSF_INDIRECT
;
3127 case N_COMM
| N_EXT
:
3128 section
= bfd_com_section_ptr
;
3130 case N_SETA
: case N_SETA
| N_EXT
:
3131 section
= bfd_abs_section_ptr
;
3132 flags
|= BSF_CONSTRUCTOR
;
3134 case N_SETT
: case N_SETT
| N_EXT
:
3135 section
= obj_textsec (abfd
);
3136 flags
|= BSF_CONSTRUCTOR
;
3137 value
-= bfd_section_vma (section
);
3139 case N_SETD
: case N_SETD
| N_EXT
:
3140 section
= obj_datasec (abfd
);
3141 flags
|= BSF_CONSTRUCTOR
;
3142 value
-= bfd_section_vma (section
);
3144 case N_SETB
: case N_SETB
| N_EXT
:
3145 section
= obj_bsssec (abfd
);
3146 flags
|= BSF_CONSTRUCTOR
;
3147 value
-= bfd_section_vma (section
);
3150 /* A warning symbol. The next symbol is the one to warn
3151 about. If there is no next symbol, just look away. */
3156 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
3157 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
3159 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3160 section
= bfd_und_section_ptr
;
3161 flags
|= BSF_WARNING
;
3164 section
= bfd_und_section_ptr
;
3168 section
= bfd_abs_section_ptr
;
3172 section
= obj_textsec (abfd
);
3173 value
-= bfd_section_vma (section
);
3177 section
= obj_datasec (abfd
);
3178 value
-= bfd_section_vma (section
);
3182 section
= obj_bsssec (abfd
);
3183 value
-= bfd_section_vma (section
);
3188 if (! ((*add_one_symbol
)
3189 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, FALSE
,
3190 (struct bfd_link_hash_entry
**) sym_hash
)))
3193 /* Restrict the maximum alignment of a common symbol based on
3194 the architecture, since a.out has no way to represent
3195 alignment requirements of a section in a .o file. FIXME:
3196 This isn't quite right: it should use the architecture of the
3197 output file, not the input files. */
3198 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3199 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3200 bfd_get_arch_info (abfd
)->section_align_power
))
3201 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3202 bfd_get_arch_info (abfd
)->section_align_power
;
3204 /* If this is a set symbol, and we are not building sets, then
3205 it is possible for the hash entry to not have been set. In
3206 such a case, treat the symbol as not globally defined. */
3207 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3209 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3213 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3220 /* Free up the internal symbols read from an a.out file. */
3223 aout_link_free_symbols (bfd
*abfd
)
3225 if (obj_aout_external_syms (abfd
) != NULL
)
3228 bfd_free_window (&obj_aout_sym_window (abfd
));
3230 free ((void *) obj_aout_external_syms (abfd
));
3232 obj_aout_external_syms (abfd
) = NULL
;
3234 if (obj_aout_external_strings (abfd
) != NULL
)
3237 bfd_free_window (&obj_aout_string_window (abfd
));
3239 free ((void *) obj_aout_external_strings (abfd
));
3241 obj_aout_external_strings (abfd
) = NULL
;
3246 /* Add symbols from an a.out object file. */
3249 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3251 if (! aout_get_external_symbols (abfd
))
3253 if (! aout_link_add_symbols (abfd
, info
))
3255 if (! info
->keep_memory
)
3257 if (! aout_link_free_symbols (abfd
))
3263 /* Look through the internal symbols to see if this object file should
3264 be included in the link. We should include this object file if it
3265 defines any symbols which are currently undefined. If this object
3266 file defines a common symbol, then we may adjust the size of the
3267 known symbol but we do not include the object file in the link
3268 (unless there is some other reason to include it). */
3271 aout_link_check_ar_symbols (bfd
*abfd
,
3272 struct bfd_link_info
*info
,
3273 bfd_boolean
*pneeded
,
3276 struct external_nlist
*p
;
3277 struct external_nlist
*pend
;
3282 /* Look through all the symbols. */
3283 p
= obj_aout_external_syms (abfd
);
3284 pend
= p
+ obj_aout_external_sym_count (abfd
);
3285 strings
= obj_aout_external_strings (abfd
);
3286 for (; p
< pend
; p
++)
3288 int type
= H_GET_8 (abfd
, p
->e_type
);
3290 struct bfd_link_hash_entry
*h
;
3292 /* Ignore symbols that are not externally visible. This is an
3293 optimization only, as we check the type more thoroughly
3295 if (((type
& N_EXT
) == 0
3296 || (type
& N_STAB
) != 0
3303 if (type
== N_WARNING
3309 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3310 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
3312 /* We are only interested in symbols that are currently
3313 undefined or common. */
3315 || (h
->type
!= bfd_link_hash_undefined
3316 && h
->type
!= bfd_link_hash_common
))
3318 if (type
== (N_INDR
| N_EXT
))
3323 if (type
== (N_TEXT
| N_EXT
)
3324 || type
== (N_DATA
| N_EXT
)
3325 || type
== (N_BSS
| N_EXT
)
3326 || type
== (N_ABS
| N_EXT
)
3327 || type
== (N_INDR
| N_EXT
))
3329 /* This object file defines this symbol. We must link it
3330 in. This is true regardless of whether the current
3331 definition of the symbol is undefined or common.
3333 If the current definition is common, we have a case in
3334 which we have already seen an object file including:
3336 and this object file from the archive includes:
3338 In such a case, whether to include this object is target
3339 dependant for backward compatibility.
3341 FIXME: The SunOS 4.1.3 linker will pull in the archive
3342 element if the symbol is defined in the .data section,
3343 but not if it is defined in the .text section. That
3344 seems a bit crazy to me, and it has not been implemented
3345 yet. However, it might be correct. */
3346 if (h
->type
== bfd_link_hash_common
)
3350 switch (info
->common_skip_ar_symbols
)
3352 case bfd_link_common_skip_none
:
3354 case bfd_link_common_skip_text
:
3355 skip
= (type
== (N_TEXT
| N_EXT
));
3357 case bfd_link_common_skip_data
:
3358 skip
= (type
== (N_DATA
| N_EXT
));
3360 case bfd_link_common_skip_all
:
3369 if (!(*info
->callbacks
3370 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3376 if (type
== (N_UNDF
| N_EXT
))
3380 value
= GET_WORD (abfd
, p
->e_value
);
3383 /* This symbol is common in the object from the archive
3385 if (h
->type
== bfd_link_hash_undefined
)
3390 symbfd
= h
->u
.undef
.abfd
;
3393 /* This symbol was created as undefined from
3394 outside BFD. We assume that we should link
3395 in the object file. This is done for the -u
3396 option in the linker. */
3397 if (!(*info
->callbacks
3398 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3403 /* Turn the current link symbol into a common
3404 symbol. It is already on the undefs list. */
3405 h
->type
= bfd_link_hash_common
;
3406 h
->u
.c
.p
= (struct bfd_link_hash_common_entry
*)
3407 bfd_hash_allocate (&info
->hash
->table
,
3408 sizeof (struct bfd_link_hash_common_entry
));
3409 if (h
->u
.c
.p
== NULL
)
3412 h
->u
.c
.size
= value
;
3414 /* FIXME: This isn't quite right. The maximum
3415 alignment of a common symbol should be set by the
3416 architecture of the output file, not of the input
3418 power
= bfd_log2 (value
);
3419 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3420 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3421 h
->u
.c
.p
->alignment_power
= power
;
3423 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3428 /* Adjust the size of the common symbol if
3430 if (value
> h
->u
.c
.size
)
3431 h
->u
.c
.size
= value
;
3441 /* This symbol is weak but defined. We must pull it in if
3442 the current link symbol is undefined, but we don't want
3443 it if the current link symbol is common. */
3444 if (h
->type
== bfd_link_hash_undefined
)
3446 if (!(*info
->callbacks
3447 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
3455 /* We do not need this object file. */
3458 /* Check a single archive element to see if we need to include it in
3459 the link. *PNEEDED is set according to whether this element is
3460 needed in the link or not. This is called from
3461 _bfd_generic_link_add_archive_symbols. */
3464 aout_link_check_archive_element (bfd
*abfd
,
3465 struct bfd_link_info
*info
,
3466 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3467 const char *name ATTRIBUTE_UNUSED
,
3468 bfd_boolean
*pneeded
)
3473 if (!aout_get_external_symbols (abfd
))
3477 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
3483 /* Potentially, the add_archive_element hook may have set a
3484 substitute BFD for us. */
3487 if (!info
->keep_memory
3488 && !aout_link_free_symbols (oldbfd
))
3490 if (!aout_get_external_symbols (abfd
))
3493 if (!aout_link_add_symbols (abfd
, info
))
3497 if (!info
->keep_memory
|| !needed
)
3499 if (!aout_link_free_symbols (abfd
))
3506 /* Given an a.out BFD, add symbols to the global hash table as
3510 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
3512 switch (bfd_get_format (abfd
))
3515 return aout_link_add_object_symbols (abfd
, info
);
3517 return _bfd_generic_link_add_archive_symbols
3518 (abfd
, info
, aout_link_check_archive_element
);
3520 bfd_set_error (bfd_error_wrong_format
);
3525 /* A hash table used for header files with N_BINCL entries. */
3527 struct aout_link_includes_table
3529 struct bfd_hash_table root
;
3532 /* A linked list of totals that we have found for a particular header
3535 struct aout_link_includes_totals
3537 struct aout_link_includes_totals
*next
;
3541 /* An entry in the header file hash table. */
3543 struct aout_link_includes_entry
3545 struct bfd_hash_entry root
;
3546 /* List of totals we have found for this file. */
3547 struct aout_link_includes_totals
*totals
;
3550 /* Look up an entry in an the header file hash table. */
3552 #define aout_link_includes_lookup(table, string, create, copy) \
3553 ((struct aout_link_includes_entry *) \
3554 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3556 /* During the final link step we need to pass around a bunch of
3557 information, so we do it in an instance of this structure. */
3559 struct aout_final_link_info
3561 /* General link information. */
3562 struct bfd_link_info
*info
;
3565 /* Reloc file positions. */
3566 file_ptr treloff
, dreloff
;
3567 /* File position of symbols. */
3570 struct bfd_strtab_hash
*strtab
;
3571 /* Header file hash table. */
3572 struct aout_link_includes_table includes
;
3573 /* A buffer large enough to hold the contents of any section. */
3575 /* A buffer large enough to hold the relocs of any section. */
3577 /* A buffer large enough to hold the symbol map of any input BFD. */
3579 /* A buffer large enough to hold output symbols of any input BFD. */
3580 struct external_nlist
*output_syms
;
3583 /* The function to create a new entry in the header file hash table. */
3585 static struct bfd_hash_entry
*
3586 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3587 struct bfd_hash_table
*table
,
3590 struct aout_link_includes_entry
*ret
=
3591 (struct aout_link_includes_entry
*) entry
;
3593 /* Allocate the structure if it has not already been allocated by a
3596 ret
= (struct aout_link_includes_entry
*)
3597 bfd_hash_allocate (table
, sizeof (* ret
));
3601 /* Call the allocation method of the superclass. */
3602 ret
= ((struct aout_link_includes_entry
*)
3603 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3606 /* Set local fields. */
3610 return (struct bfd_hash_entry
*) ret
;
3613 /* Write out a symbol that was not associated with an a.out input
3617 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3619 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3620 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3624 struct external_nlist outsym
;
3628 if (h
->root
.type
== bfd_link_hash_warning
)
3630 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3631 if (h
->root
.type
== bfd_link_hash_new
)
3635 output_bfd
= flaginfo
->output_bfd
;
3637 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3639 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3640 (output_bfd
, flaginfo
->info
, h
)))
3642 /* FIXME: No way to handle errors. */
3652 /* An indx of -2 means the symbol must be written. */
3654 && (flaginfo
->info
->strip
== strip_all
3655 || (flaginfo
->info
->strip
== strip_some
3656 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3657 FALSE
, FALSE
) == NULL
)))
3660 switch (h
->root
.type
)
3663 case bfd_link_hash_warning
:
3665 /* Avoid variable not initialized warnings. */
3667 case bfd_link_hash_new
:
3668 /* This can happen for set symbols when sets are not being
3671 case bfd_link_hash_undefined
:
3672 type
= N_UNDF
| N_EXT
;
3675 case bfd_link_hash_defined
:
3676 case bfd_link_hash_defweak
:
3680 sec
= h
->root
.u
.def
.section
->output_section
;
3681 BFD_ASSERT (bfd_is_abs_section (sec
)
3682 || sec
->owner
== output_bfd
);
3683 if (sec
== obj_textsec (output_bfd
))
3684 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3685 else if (sec
== obj_datasec (output_bfd
))
3686 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3687 else if (sec
== obj_bsssec (output_bfd
))
3688 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3690 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3692 val
= (h
->root
.u
.def
.value
3694 + h
->root
.u
.def
.section
->output_offset
);
3697 case bfd_link_hash_common
:
3698 type
= N_UNDF
| N_EXT
;
3699 val
= h
->root
.u
.c
.size
;
3701 case bfd_link_hash_undefweak
:
3705 case bfd_link_hash_indirect
:
3706 /* We ignore these symbols, since the indirected symbol is
3707 already in the hash table. */
3711 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3712 H_PUT_8 (output_bfd
, 0, outsym
.e_other
);
3713 H_PUT_16 (output_bfd
, 0, outsym
.e_desc
);
3714 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3716 if (indx
== - (bfd_size_type
) 1)
3717 /* FIXME: No way to handle errors. */
3720 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3721 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3723 amt
= EXTERNAL_NLIST_SIZE
;
3724 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3725 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3726 /* FIXME: No way to handle errors. */
3729 flaginfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
3730 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3731 ++obj_aout_external_sym_count (output_bfd
);
3736 /* Handle a link order which is supposed to generate a reloc. */
3739 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3741 struct bfd_link_order
*p
)
3743 struct bfd_link_order_reloc
*pr
;
3746 reloc_howto_type
*howto
;
3747 file_ptr
*reloff_ptr
= NULL
;
3748 struct reloc_std_external srel
;
3749 struct reloc_ext_external erel
;
3755 if (p
->type
== bfd_section_reloc_link_order
)
3758 if (bfd_is_abs_section (pr
->u
.section
))
3759 r_index
= N_ABS
| N_EXT
;
3762 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3763 r_index
= pr
->u
.section
->target_index
;
3768 struct aout_link_hash_entry
*h
;
3770 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3772 h
= ((struct aout_link_hash_entry
*)
3773 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3774 pr
->u
.name
, FALSE
, FALSE
, TRUE
));
3780 /* We decided to strip this symbol, but it turns out that we
3781 can't. Note that we lose the other and desc information
3782 here. I don't think that will ever matter for a global
3786 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3792 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3793 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3798 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3801 bfd_set_error (bfd_error_bad_value
);
3805 if (o
== obj_textsec (flaginfo
->output_bfd
))
3806 reloff_ptr
= &flaginfo
->treloff
;
3807 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3808 reloff_ptr
= &flaginfo
->dreloff
;
3812 if (obj_reloc_entry_size (flaginfo
->output_bfd
) == RELOC_STD_SIZE
)
3815 MY_put_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3823 unsigned int r_length
;
3825 r_pcrel
= (int) howto
->pc_relative
;
3826 r_baserel
= (howto
->type
& 8) != 0;
3827 r_jmptable
= (howto
->type
& 16) != 0;
3828 r_relative
= (howto
->type
& 32) != 0;
3829 if (bfd_get_reloc_size (howto
) != 8)
3830 r_length
= howto
->size
; /* Size as a power of two. */
3834 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3835 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3837 srel
.r_index
[0] = r_index
>> 16;
3838 srel
.r_index
[1] = r_index
>> 8;
3839 srel
.r_index
[2] = r_index
;
3841 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3842 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3843 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3844 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3845 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3846 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3850 srel
.r_index
[2] = r_index
>> 16;
3851 srel
.r_index
[1] = r_index
>> 8;
3852 srel
.r_index
[0] = r_index
;
3854 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3855 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3856 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3857 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3858 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3859 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3863 rel_ptr
= (void *) &srel
;
3865 /* We have to write the addend into the object file, since
3866 standard a.out relocs are in place. It would be more
3867 reliable if we had the current contents of the file here,
3868 rather than assuming zeroes, but we can't read the file since
3869 it was opened using bfd_openw. */
3870 if (pr
->addend
!= 0)
3873 bfd_reloc_status_type r
;
3877 size
= bfd_get_reloc_size (howto
);
3878 buf
= (bfd_byte
*) bfd_zmalloc (size
);
3879 if (buf
== NULL
&& size
!= 0)
3881 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3882 (bfd_vma
) pr
->addend
, buf
);
3888 case bfd_reloc_outofrange
:
3890 case bfd_reloc_overflow
:
3891 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3892 (flaginfo
->info
, NULL
,
3893 (p
->type
== bfd_section_reloc_link_order
3894 ? bfd_section_name (pr
->u
.section
)
3896 howto
->name
, pr
->addend
, NULL
, NULL
, (bfd_vma
) 0);
3899 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
, (void *) buf
,
3900 (file_ptr
) p
->offset
, size
);
3908 #ifdef MY_put_ext_reloc
3909 MY_put_ext_reloc (flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
,
3910 howto
, &erel
, pr
->addend
);
3912 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, erel
.r_address
);
3914 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3916 erel
.r_index
[0] = r_index
>> 16;
3917 erel
.r_index
[1] = r_index
>> 8;
3918 erel
.r_index
[2] = r_index
;
3920 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
3921 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
3925 erel
.r_index
[2] = r_index
>> 16;
3926 erel
.r_index
[1] = r_index
>> 8;
3927 erel
.r_index
[0] = r_index
;
3929 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
3930 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
3933 PUT_WORD (flaginfo
->output_bfd
, (bfd_vma
) pr
->addend
, erel
.r_addend
);
3934 #endif /* MY_put_ext_reloc */
3936 rel_ptr
= (void *) &erel
;
3939 amt
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3940 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3941 || bfd_bwrite (rel_ptr
, amt
, flaginfo
->output_bfd
) != amt
)
3944 *reloff_ptr
+= obj_reloc_entry_size (flaginfo
->output_bfd
);
3946 /* Assert that the relocs have not run into the symbols, and that n
3947 the text relocs have not run into the data relocs. */
3948 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3949 && (reloff_ptr
!= &flaginfo
->treloff
3951 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3956 /* Get the section corresponding to a reloc index. */
3958 static INLINE asection
*
3959 aout_reloc_index_to_section (bfd
*abfd
, int indx
)
3961 switch (indx
& N_TYPE
)
3963 case N_TEXT
: return obj_textsec (abfd
);
3964 case N_DATA
: return obj_datasec (abfd
);
3965 case N_BSS
: return obj_bsssec (abfd
);
3967 case N_UNDF
: return bfd_abs_section_ptr
;
3973 /* Relocate an a.out section using standard a.out relocs. */
3976 aout_link_input_section_std (struct aout_final_link_info
*flaginfo
,
3978 asection
*input_section
,
3979 struct reloc_std_external
*relocs
,
3980 bfd_size_type rel_size
,
3983 bfd_boolean (*check_dynamic_reloc
)
3984 (struct bfd_link_info
*, bfd
*, asection
*,
3985 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
3988 bfd_boolean relocatable
;
3989 struct external_nlist
*syms
;
3991 struct aout_link_hash_entry
**sym_hashes
;
3993 bfd_size_type reloc_count
;
3994 struct reloc_std_external
*rel
;
3995 struct reloc_std_external
*rel_end
;
3997 output_bfd
= flaginfo
->output_bfd
;
3998 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4000 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
4001 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4002 == output_bfd
->xvec
->header_byteorder
);
4004 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4005 syms
= obj_aout_external_syms (input_bfd
);
4006 strings
= obj_aout_external_strings (input_bfd
);
4007 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4008 symbol_map
= flaginfo
->symbol_map
;
4010 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4012 rel_end
= rel
+ reloc_count
;
4013 for (; rel
< rel_end
; rel
++)
4020 reloc_howto_type
*howto
;
4021 struct aout_link_hash_entry
*h
= NULL
;
4023 bfd_reloc_status_type r
;
4025 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4027 #ifdef MY_reloc_howto
4028 howto
= MY_reloc_howto (input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
4034 unsigned int howto_idx
;
4036 if (bfd_header_big_endian (input_bfd
))
4038 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4039 | ((unsigned int) rel
->r_index
[1] << 8)
4041 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4042 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4043 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4044 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4045 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4046 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4047 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4051 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4052 | ((unsigned int) rel
->r_index
[1] << 8)
4054 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4055 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4056 r_baserel
= (0 != (rel
->r_type
[0]
4057 & RELOC_STD_BITS_BASEREL_LITTLE
));
4058 r_jmptable
= (0 != (rel
->r_type
[0]
4059 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4060 r_relative
= (0 != (rel
->r_type
[0]
4061 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4062 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4063 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4066 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4067 + 16 * r_jmptable
+ 32 * r_relative
);
4068 if (howto_idx
< TABLE_SIZE (howto_table_std
))
4069 howto
= howto_table_std
+ howto_idx
;
4077 _bfd_error_handler (_("%pB: unsupported relocation type"),
4079 bfd_set_error (bfd_error_bad_value
);
4085 /* We are generating a relocatable output file, and must
4086 modify the reloc accordingly. */
4089 /* If we know the symbol this relocation is against,
4090 convert it into a relocation against a section. This
4091 is what the native linker does. */
4092 h
= sym_hashes
[r_index
];
4094 && (h
->root
.type
== bfd_link_hash_defined
4095 || h
->root
.type
== bfd_link_hash_defweak
))
4097 asection
*output_section
;
4099 /* Change the r_extern value. */
4100 if (bfd_header_big_endian (output_bfd
))
4101 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4103 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4105 /* Compute a new r_index. */
4106 output_section
= h
->root
.u
.def
.section
->output_section
;
4107 if (output_section
== obj_textsec (output_bfd
))
4109 else if (output_section
== obj_datasec (output_bfd
))
4111 else if (output_section
== obj_bsssec (output_bfd
))
4116 /* Add the symbol value and the section VMA to the
4117 addend stored in the contents. */
4118 relocation
= (h
->root
.u
.def
.value
4119 + output_section
->vma
4120 + h
->root
.u
.def
.section
->output_offset
);
4124 /* We must change r_index according to the symbol
4126 r_index
= symbol_map
[r_index
];
4132 /* We decided to strip this symbol, but it
4133 turns out that we can't. Note that we
4134 lose the other and desc information here.
4135 I don't think that will ever matter for a
4141 if (!aout_link_write_other_symbol (&h
->root
.root
,
4151 name
= strings
+ GET_WORD (input_bfd
,
4152 syms
[r_index
].e_strx
);
4153 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4154 (flaginfo
->info
, name
,
4155 input_bfd
, input_section
, r_addr
);
4163 /* Write out the new r_index value. */
4164 if (bfd_header_big_endian (output_bfd
))
4166 rel
->r_index
[0] = r_index
>> 16;
4167 rel
->r_index
[1] = r_index
>> 8;
4168 rel
->r_index
[2] = r_index
;
4172 rel
->r_index
[2] = r_index
>> 16;
4173 rel
->r_index
[1] = r_index
>> 8;
4174 rel
->r_index
[0] = r_index
;
4181 /* This is a relocation against a section. We must
4182 adjust by the amount that the section moved. */
4183 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4184 relocation
= (section
->output_section
->vma
4185 + section
->output_offset
4189 /* Change the address of the relocation. */
4190 PUT_WORD (output_bfd
,
4191 r_addr
+ input_section
->output_offset
,
4194 /* Adjust a PC relative relocation by removing the reference
4195 to the original address in the section and including the
4196 reference to the new address. */
4198 relocation
-= (input_section
->output_section
->vma
4199 + input_section
->output_offset
4200 - input_section
->vma
);
4202 #ifdef MY_relocatable_reloc
4203 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4206 if (relocation
== 0)
4209 r
= MY_relocate_contents (howto
,
4210 input_bfd
, relocation
,
4217 /* We are generating an executable, and must do a full
4223 h
= sym_hashes
[r_index
];
4226 && (h
->root
.type
== bfd_link_hash_defined
4227 || h
->root
.type
== bfd_link_hash_defweak
))
4229 relocation
= (h
->root
.u
.def
.value
4230 + h
->root
.u
.def
.section
->output_section
->vma
4231 + h
->root
.u
.def
.section
->output_offset
);
4234 && h
->root
.type
== bfd_link_hash_undefweak
)
4246 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4247 relocation
= (section
->output_section
->vma
4248 + section
->output_offset
4251 relocation
+= input_section
->vma
;
4254 if (check_dynamic_reloc
!= NULL
)
4258 if (! ((*check_dynamic_reloc
)
4259 (flaginfo
->info
, input_bfd
, input_section
, h
,
4260 (void *) rel
, contents
, &skip
, &relocation
)))
4266 /* Now warn if a global symbol is undefined. We could not
4267 do this earlier, because check_dynamic_reloc might want
4268 to skip this reloc. */
4269 if (hundef
&& ! bfd_link_pic (flaginfo
->info
) && ! r_baserel
)
4274 name
= h
->root
.root
.string
;
4276 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4277 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4278 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4281 r
= MY_final_link_relocate (howto
,
4282 input_bfd
, input_section
,
4283 contents
, r_addr
, relocation
,
4287 if (r
!= bfd_reloc_ok
)
4292 case bfd_reloc_outofrange
:
4294 case bfd_reloc_overflow
:
4301 name
= strings
+ GET_WORD (input_bfd
,
4302 syms
[r_index
].e_strx
);
4307 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4308 name
= bfd_section_name (s
);
4310 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4311 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4312 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
4322 /* Relocate an a.out section using extended a.out relocs. */
4325 aout_link_input_section_ext (struct aout_final_link_info
*flaginfo
,
4327 asection
*input_section
,
4328 struct reloc_ext_external
*relocs
,
4329 bfd_size_type rel_size
,
4332 bfd_boolean (*check_dynamic_reloc
)
4333 (struct bfd_link_info
*, bfd
*, asection
*,
4334 struct aout_link_hash_entry
*, void *, bfd_byte
*, bfd_boolean
*,
4337 bfd_boolean relocatable
;
4338 struct external_nlist
*syms
;
4340 struct aout_link_hash_entry
**sym_hashes
;
4342 bfd_size_type reloc_count
;
4343 struct reloc_ext_external
*rel
;
4344 struct reloc_ext_external
*rel_end
;
4346 output_bfd
= flaginfo
->output_bfd
;
4347 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4349 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4350 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
4351 == output_bfd
->xvec
->header_byteorder
);
4353 relocatable
= bfd_link_relocatable (flaginfo
->info
);
4354 syms
= obj_aout_external_syms (input_bfd
);
4355 strings
= obj_aout_external_strings (input_bfd
);
4356 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4357 symbol_map
= flaginfo
->symbol_map
;
4359 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4361 rel_end
= rel
+ reloc_count
;
4362 for (; rel
< rel_end
; rel
++)
4367 unsigned int r_type
;
4369 struct aout_link_hash_entry
*h
= NULL
;
4370 asection
*r_section
= NULL
;
4373 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4375 if (bfd_header_big_endian (input_bfd
))
4377 r_index
= (((unsigned int) rel
->r_index
[0] << 16)
4378 | ((unsigned int) rel
->r_index
[1] << 8)
4380 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4381 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4382 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4386 r_index
= (((unsigned int) rel
->r_index
[2] << 16)
4387 | ((unsigned int) rel
->r_index
[1] << 8)
4389 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4390 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4391 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4394 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4396 if (r_type
>= TABLE_SIZE (howto_table_ext
))
4398 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
4400 bfd_set_error (bfd_error_bad_value
);
4406 /* We are generating a relocatable output file, and must
4407 modify the reloc accordingly. */
4409 || r_type
== (unsigned int) RELOC_BASE10
4410 || r_type
== (unsigned int) RELOC_BASE13
4411 || r_type
== (unsigned int) RELOC_BASE22
)
4413 /* If we know the symbol this relocation is against,
4414 convert it into a relocation against a section. This
4415 is what the native linker does. */
4416 if (r_type
== (unsigned int) RELOC_BASE10
4417 || r_type
== (unsigned int) RELOC_BASE13
4418 || r_type
== (unsigned int) RELOC_BASE22
)
4421 h
= sym_hashes
[r_index
];
4423 && (h
->root
.type
== bfd_link_hash_defined
4424 || h
->root
.type
== bfd_link_hash_defweak
))
4426 asection
*output_section
;
4428 /* Change the r_extern value. */
4429 if (bfd_header_big_endian (output_bfd
))
4430 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4432 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4434 /* Compute a new r_index. */
4435 output_section
= h
->root
.u
.def
.section
->output_section
;
4436 if (output_section
== obj_textsec (output_bfd
))
4438 else if (output_section
== obj_datasec (output_bfd
))
4440 else if (output_section
== obj_bsssec (output_bfd
))
4445 /* Add the symbol value and the section VMA to the
4447 relocation
= (h
->root
.u
.def
.value
4448 + output_section
->vma
4449 + h
->root
.u
.def
.section
->output_offset
);
4451 /* Now RELOCATION is the VMA of the final
4452 destination. If this is a PC relative reloc,
4453 then ADDEND is the negative of the source VMA.
4454 We want to set ADDEND to the difference between
4455 the destination VMA and the source VMA, which
4456 means we must adjust RELOCATION by the change in
4457 the source VMA. This is done below. */
4461 /* We must change r_index according to the symbol
4463 r_index
= symbol_map
[r_index
];
4469 /* We decided to strip this symbol, but it
4470 turns out that we can't. Note that we
4471 lose the other and desc information here.
4472 I don't think that will ever matter for a
4478 if (!aout_link_write_other_symbol (&h
->root
.root
,
4488 name
= strings
+ GET_WORD (input_bfd
,
4489 syms
[r_index
].e_strx
);
4490 (*flaginfo
->info
->callbacks
->unattached_reloc
)
4491 (flaginfo
->info
, name
,
4492 input_bfd
, input_section
, r_addr
);
4499 /* If this is a PC relative reloc, then the addend
4500 is the negative of the source VMA. We must
4501 adjust it by the change in the source VMA. This
4505 /* Write out the new r_index value. */
4506 if (bfd_header_big_endian (output_bfd
))
4508 rel
->r_index
[0] = r_index
>> 16;
4509 rel
->r_index
[1] = r_index
>> 8;
4510 rel
->r_index
[2] = r_index
;
4514 rel
->r_index
[2] = r_index
>> 16;
4515 rel
->r_index
[1] = r_index
>> 8;
4516 rel
->r_index
[0] = r_index
;
4521 /* This is a relocation against a section. We must
4522 adjust by the amount that the section moved. */
4523 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4524 relocation
= (r_section
->output_section
->vma
4525 + r_section
->output_offset
4528 /* If this is a PC relative reloc, then the addend is
4529 the difference in VMA between the destination and the
4530 source. We have just adjusted for the change in VMA
4531 of the destination, so we must also adjust by the
4532 change in VMA of the source. This is done below. */
4535 /* As described above, we must always adjust a PC relative
4536 reloc by the change in VMA of the source. However, if
4537 pcrel_offset is set, then the addend does not include the
4538 location within the section, in which case we don't need
4539 to adjust anything. */
4540 if (howto_table_ext
[r_type
].pc_relative
4541 && ! howto_table_ext
[r_type
].pcrel_offset
)
4542 relocation
-= (input_section
->output_section
->vma
4543 + input_section
->output_offset
4544 - input_section
->vma
);
4546 /* Change the addend if necessary. */
4547 if (relocation
!= 0)
4548 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4550 /* Change the address of the relocation. */
4551 PUT_WORD (output_bfd
,
4552 r_addr
+ input_section
->output_offset
,
4558 bfd_reloc_status_type r
;
4560 /* We are generating an executable, and must do a full
4566 h
= sym_hashes
[r_index
];
4569 && (h
->root
.type
== bfd_link_hash_defined
4570 || h
->root
.type
== bfd_link_hash_defweak
))
4572 relocation
= (h
->root
.u
.def
.value
4573 + h
->root
.u
.def
.section
->output_section
->vma
4574 + h
->root
.u
.def
.section
->output_offset
);
4577 && h
->root
.type
== bfd_link_hash_undefweak
)
4585 else if (r_type
== (unsigned int) RELOC_BASE10
4586 || r_type
== (unsigned int) RELOC_BASE13
4587 || r_type
== (unsigned int) RELOC_BASE22
)
4589 struct external_nlist
*sym
;
4592 /* For base relative relocs, r_index is always an index
4593 into the symbol table, even if r_extern is 0. */
4594 sym
= syms
+ r_index
;
4595 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4596 if ((type
& N_TYPE
) == N_TEXT
4598 r_section
= obj_textsec (input_bfd
);
4599 else if ((type
& N_TYPE
) == N_DATA
4601 r_section
= obj_datasec (input_bfd
);
4602 else if ((type
& N_TYPE
) == N_BSS
4604 r_section
= obj_bsssec (input_bfd
);
4605 else if ((type
& N_TYPE
) == N_ABS
4607 r_section
= bfd_abs_section_ptr
;
4610 relocation
= (r_section
->output_section
->vma
4611 + r_section
->output_offset
4612 + (GET_WORD (input_bfd
, sym
->e_value
)
4617 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4619 /* If this is a PC relative reloc, then R_ADDEND is the
4620 difference between the two vmas, or
4621 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4623 old_dest_sec == section->vma
4625 old_src_sec == input_section->vma
4627 old_src_off == r_addr
4629 _bfd_final_link_relocate expects RELOCATION +
4630 R_ADDEND to be the VMA of the destination minus
4631 r_addr (the minus r_addr is because this relocation
4632 is not pcrel_offset, which is a bit confusing and
4633 should, perhaps, be changed), or
4636 new_dest_sec == output_section->vma + output_offset
4637 We arrange for this to happen by setting RELOCATION to
4638 new_dest_sec + old_src_sec - old_dest_sec
4640 If this is not a PC relative reloc, then R_ADDEND is
4641 simply the VMA of the destination, so we set
4642 RELOCATION to the change in the destination VMA, or
4643 new_dest_sec - old_dest_sec
4645 relocation
= (r_section
->output_section
->vma
4646 + r_section
->output_offset
4648 if (howto_table_ext
[r_type
].pc_relative
)
4649 relocation
+= input_section
->vma
;
4652 if (check_dynamic_reloc
!= NULL
)
4656 if (! ((*check_dynamic_reloc
)
4657 (flaginfo
->info
, input_bfd
, input_section
, h
,
4658 (void *) rel
, contents
, &skip
, &relocation
)))
4664 /* Now warn if a global symbol is undefined. We could not
4665 do this earlier, because check_dynamic_reloc might want
4666 to skip this reloc. */
4668 && ! bfd_link_pic (flaginfo
->info
)
4669 && r_type
!= (unsigned int) RELOC_BASE10
4670 && r_type
!= (unsigned int) RELOC_BASE13
4671 && r_type
!= (unsigned int) RELOC_BASE22
)
4676 name
= h
->root
.root
.string
;
4678 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4679 (*flaginfo
->info
->callbacks
->undefined_symbol
)
4680 (flaginfo
->info
, name
, input_bfd
, input_section
, r_addr
, TRUE
);
4683 if (r_type
!= (unsigned int) RELOC_SPARC_REV32
)
4684 r
= MY_final_link_relocate (howto_table_ext
+ r_type
,
4685 input_bfd
, input_section
,
4686 contents
, r_addr
, relocation
,
4692 x
= bfd_get_32 (input_bfd
, contents
+ r_addr
);
4693 x
= x
+ relocation
+ r_addend
;
4694 bfd_putl32 (/*input_bfd,*/ x
, contents
+ r_addr
);
4698 if (r
!= bfd_reloc_ok
)
4703 case bfd_reloc_outofrange
:
4705 case bfd_reloc_overflow
:
4712 || r_type
== (unsigned int) RELOC_BASE10
4713 || r_type
== (unsigned int) RELOC_BASE13
4714 || r_type
== (unsigned int) RELOC_BASE22
)
4715 name
= strings
+ GET_WORD (input_bfd
,
4716 syms
[r_index
].e_strx
);
4721 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4722 name
= bfd_section_name (s
);
4724 (*flaginfo
->info
->callbacks
->reloc_overflow
)
4725 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
,
4726 howto_table_ext
[r_type
].name
,
4727 r_addend
, input_bfd
, input_section
, r_addr
);
4738 /* Link an a.out section into the output file. */
4741 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
4743 asection
*input_section
,
4744 file_ptr
*reloff_ptr
,
4745 bfd_size_type rel_size
)
4747 bfd_size_type input_size
;
4750 /* Get the section contents. */
4751 input_size
= input_section
->size
;
4752 if (! bfd_get_section_contents (input_bfd
, input_section
,
4753 (void *) flaginfo
->contents
,
4754 (file_ptr
) 0, input_size
))
4757 /* Read in the relocs if we haven't already done it. */
4758 if (aout_section_data (input_section
) != NULL
4759 && aout_section_data (input_section
)->relocs
!= NULL
)
4760 relocs
= aout_section_data (input_section
)->relocs
;
4763 relocs
= flaginfo
->relocs
;
4766 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4767 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
4772 /* Relocate the section contents. */
4773 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4775 if (! aout_link_input_section_std (flaginfo
, input_bfd
, input_section
,
4776 (struct reloc_std_external
*) relocs
,
4777 rel_size
, flaginfo
->contents
))
4782 if (! aout_link_input_section_ext (flaginfo
, input_bfd
, input_section
,
4783 (struct reloc_ext_external
*) relocs
,
4784 rel_size
, flaginfo
->contents
))
4788 /* Write out the section contents. */
4789 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
4790 input_section
->output_section
,
4791 (void *) flaginfo
->contents
,
4792 (file_ptr
) input_section
->output_offset
,
4796 /* If we are producing relocatable output, the relocs were
4797 modified, and we now write them out. */
4798 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
4800 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4802 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
4804 *reloff_ptr
+= rel_size
;
4806 /* Assert that the relocs have not run into the symbols, and
4807 that if these are the text relocs they have not run into the
4809 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
4810 && (reloff_ptr
!= &flaginfo
->treloff
4812 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
4818 /* Adjust and write out the symbols for an a.out file. Set the new
4819 symbol indices into a symbol_map. */
4822 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4825 bfd_size_type sym_count
;
4827 enum bfd_link_strip strip
;
4828 enum bfd_link_discard discard
;
4829 struct external_nlist
*outsym
;
4830 bfd_size_type strtab_index
;
4831 struct external_nlist
*sym
;
4832 struct external_nlist
*sym_end
;
4833 struct aout_link_hash_entry
**sym_hash
;
4836 bfd_boolean skip_next
;
4838 output_bfd
= flaginfo
->output_bfd
;
4839 sym_count
= obj_aout_external_sym_count (input_bfd
);
4840 strings
= obj_aout_external_strings (input_bfd
);
4841 strip
= flaginfo
->info
->strip
;
4842 discard
= flaginfo
->info
->discard
;
4843 outsym
= flaginfo
->output_syms
;
4845 /* First write out a symbol for this object file, unless we are
4846 discarding such symbols. */
4847 if (strip
!= strip_all
4848 && (strip
!= strip_some
4849 || bfd_hash_lookup (flaginfo
->info
->keep_hash
,
4850 bfd_get_filename (input_bfd
),
4851 FALSE
, FALSE
) != NULL
)
4852 && discard
!= discard_all
)
4854 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4855 H_PUT_8 (output_bfd
, 0, outsym
->e_other
);
4856 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4857 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4858 bfd_get_filename (input_bfd
), FALSE
);
4859 if (strtab_index
== (bfd_size_type
) -1)
4861 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4862 PUT_WORD (output_bfd
,
4863 (bfd_section_vma (obj_textsec (input_bfd
)->output_section
)
4864 + obj_textsec (input_bfd
)->output_offset
),
4866 ++obj_aout_external_sym_count (output_bfd
);
4872 sym
= obj_aout_external_syms (input_bfd
);
4873 sym_end
= sym
+ sym_count
;
4874 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4875 symbol_map
= flaginfo
->symbol_map
;
4876 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4877 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4881 struct aout_link_hash_entry
*h
;
4887 /* We set *symbol_map to 0 above for all symbols. If it has
4888 already been set to -1 for this symbol, it means that we are
4889 discarding it because it appears in a duplicate header file.
4890 See the N_BINCL code below. */
4891 if (*symbol_map
== -1)
4894 /* Initialize *symbol_map to -1, which means that the symbol was
4895 not copied into the output file. We will change it later if
4896 we do copy the symbol over. */
4899 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4900 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4906 /* Pass this symbol through. It is the target of an
4907 indirect or warning symbol. */
4908 val
= GET_WORD (input_bfd
, sym
->e_value
);
4913 /* Skip this symbol, which is the target of an indirect
4914 symbol that we have changed to no longer be an indirect
4921 struct aout_link_hash_entry
*hresolve
;
4923 /* We have saved the hash table entry for this symbol, if
4924 there is one. Note that we could just look it up again
4925 in the hash table, provided we first check that it is an
4929 /* Use the name from the hash table, in case the symbol was
4932 && h
->root
.type
!= bfd_link_hash_warning
)
4933 name
= h
->root
.root
.string
;
4935 /* If this is an indirect or warning symbol, then change
4936 hresolve to the base symbol. We also change *sym_hash so
4937 that the relocation routines relocate against the real
4940 if (h
!= (struct aout_link_hash_entry
*) NULL
4941 && (h
->root
.type
== bfd_link_hash_indirect
4942 || h
->root
.type
== bfd_link_hash_warning
))
4944 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4945 while (hresolve
->root
.type
== bfd_link_hash_indirect
4946 || hresolve
->root
.type
== bfd_link_hash_warning
)
4947 hresolve
= ((struct aout_link_hash_entry
*)
4948 hresolve
->root
.u
.i
.link
);
4949 *sym_hash
= hresolve
;
4952 /* If the symbol has already been written out, skip it. */
4956 if ((type
& N_TYPE
) == N_INDR
4957 || type
== N_WARNING
)
4959 *symbol_map
= h
->indx
;
4963 /* See if we are stripping this symbol. */
4969 case strip_debugger
:
4970 if ((type
& N_STAB
) != 0)
4974 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
4989 /* Get the value of the symbol. */
4990 if ((type
& N_TYPE
) == N_TEXT
4992 symsec
= obj_textsec (input_bfd
);
4993 else if ((type
& N_TYPE
) == N_DATA
4995 symsec
= obj_datasec (input_bfd
);
4996 else if ((type
& N_TYPE
) == N_BSS
4998 symsec
= obj_bsssec (input_bfd
);
4999 else if ((type
& N_TYPE
) == N_ABS
5001 symsec
= bfd_abs_section_ptr
;
5002 else if (((type
& N_TYPE
) == N_INDR
5003 && (hresolve
== NULL
5004 || (hresolve
->root
.type
!= bfd_link_hash_defined
5005 && hresolve
->root
.type
!= bfd_link_hash_defweak
5006 && hresolve
->root
.type
!= bfd_link_hash_common
)))
5007 || type
== N_WARNING
)
5009 /* Pass the next symbol through unchanged. The
5010 condition above for indirect symbols is so that if
5011 the indirect symbol was defined, we output it with
5012 the correct definition so the debugger will
5015 val
= GET_WORD (input_bfd
, sym
->e_value
);
5018 else if ((type
& N_STAB
) != 0)
5020 val
= GET_WORD (input_bfd
, sym
->e_value
);
5025 /* If we get here with an indirect symbol, it means that
5026 we are outputting it with a real definition. In such
5027 a case we do not want to output the next symbol,
5028 which is the target of the indirection. */
5029 if ((type
& N_TYPE
) == N_INDR
)
5034 /* We need to get the value from the hash table. We use
5035 hresolve so that if we have defined an indirect
5036 symbol we output the final definition. */
5039 switch (type
& N_TYPE
)
5042 symsec
= obj_textsec (input_bfd
);
5045 symsec
= obj_datasec (input_bfd
);
5048 symsec
= obj_bsssec (input_bfd
);
5051 symsec
= bfd_abs_section_ptr
;
5058 else if (hresolve
->root
.type
== bfd_link_hash_defined
5059 || hresolve
->root
.type
== bfd_link_hash_defweak
)
5061 asection
*input_section
;
5062 asection
*output_section
;
5064 /* This case usually means a common symbol which was
5065 turned into a defined symbol. */
5066 input_section
= hresolve
->root
.u
.def
.section
;
5067 output_section
= input_section
->output_section
;
5068 BFD_ASSERT (bfd_is_abs_section (output_section
)
5069 || output_section
->owner
== output_bfd
);
5070 val
= (hresolve
->root
.u
.def
.value
5071 + bfd_section_vma (output_section
)
5072 + input_section
->output_offset
);
5074 /* Get the correct type based on the section. If
5075 this is a constructed set, force it to be
5076 globally visible. */
5085 if (output_section
== obj_textsec (output_bfd
))
5086 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5089 else if (output_section
== obj_datasec (output_bfd
))
5090 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5093 else if (output_section
== obj_bsssec (output_bfd
))
5094 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5098 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
5102 else if (hresolve
->root
.type
== bfd_link_hash_common
)
5103 val
= hresolve
->root
.u
.c
.size
;
5104 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
5113 val
= (symsec
->output_section
->vma
5114 + symsec
->output_offset
5115 + (GET_WORD (input_bfd
, sym
->e_value
)
5118 /* If this is a global symbol set the written flag, and if
5119 it is a local symbol see if we should discard it. */
5123 h
->indx
= obj_aout_external_sym_count (output_bfd
);
5125 else if ((type
& N_TYPE
) != N_SETT
5126 && (type
& N_TYPE
) != N_SETD
5127 && (type
& N_TYPE
) != N_SETB
5128 && (type
& N_TYPE
) != N_SETA
)
5133 case discard_sec_merge
:
5136 if ((type
& N_STAB
) == 0
5137 && bfd_is_local_label_name (input_bfd
, name
))
5151 /* An N_BINCL symbol indicates the start of the stabs
5152 entries for a header file. We need to scan ahead to the
5153 next N_EINCL symbol, ignoring nesting, adding up all the
5154 characters in the symbol names, not including the file
5155 numbers in types (the first number after an open
5157 if (type
== (int) N_BINCL
)
5159 struct external_nlist
*incl_sym
;
5161 struct aout_link_includes_entry
*incl_entry
;
5162 struct aout_link_includes_totals
*t
;
5166 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
5170 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5171 if (incl_type
== (int) N_EINCL
)
5177 else if (incl_type
== (int) N_BINCL
)
5183 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
5184 for (; *s
!= '\0'; s
++)
5189 /* Skip the file number. */
5191 while (ISDIGIT (*s
))
5199 /* If we have already included a header file with the
5200 same value, then replace this one with an N_EXCL
5202 copy
= (bfd_boolean
) (! flaginfo
->info
->keep_memory
);
5203 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
5205 if (incl_entry
== NULL
)
5207 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
5208 if (t
->total
== val
)
5212 /* This is the first time we have seen this header
5213 file with this set of stabs strings. */
5214 t
= (struct aout_link_includes_totals
*)
5215 bfd_hash_allocate (&flaginfo
->includes
.root
,
5220 t
->next
= incl_entry
->totals
;
5221 incl_entry
->totals
= t
;
5227 /* This is a duplicate header file. We must change
5228 it to be an N_EXCL entry, and mark all the
5229 included symbols to prevent outputting them. */
5230 type
= (int) N_EXCL
;
5233 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
5235 incl_sym
++, incl_map
++)
5239 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
5240 if (incl_type
== (int) N_EINCL
)
5249 else if (incl_type
== (int) N_BINCL
)
5258 /* Copy this symbol into the list of symbols we are going to
5260 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
5261 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_other
), outsym
->e_other
);
5262 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
5264 if (! flaginfo
->info
->keep_memory
)
5266 /* name points into a string table which we are going to
5267 free. If there is a hash table entry, use that string.
5268 Otherwise, copy name into memory. */
5270 name
= h
->root
.root
.string
;
5274 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
5276 if (strtab_index
== (bfd_size_type
) -1)
5278 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
5279 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
5280 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
5281 ++obj_aout_external_sym_count (output_bfd
);
5285 /* Write out the output symbols we have just constructed. */
5286 if (outsym
> flaginfo
->output_syms
)
5288 bfd_size_type outsym_size
;
5290 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
5292 outsym_size
= outsym
- flaginfo
->output_syms
;
5293 outsym_size
*= EXTERNAL_NLIST_SIZE
;
5294 if (bfd_bwrite ((void *) flaginfo
->output_syms
, outsym_size
, output_bfd
)
5297 flaginfo
->symoff
+= outsym_size
;
5303 /* Link an a.out input BFD into the output file. */
5306 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
5308 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
5310 /* If this is a dynamic object, it may need special handling. */
5311 if ((input_bfd
->flags
& DYNAMIC
) != 0
5312 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
5313 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
5314 (flaginfo
->info
, input_bfd
));
5316 /* Get the symbols. We probably have them already, unless
5317 flaginfo->info->keep_memory is FALSE. */
5318 if (! aout_get_external_symbols (input_bfd
))
5321 /* Write out the symbols and get a map of the new indices. The map
5322 is placed into flaginfo->symbol_map. */
5323 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
5326 /* Relocate and write out the sections. These functions use the
5327 symbol map created by aout_link_write_symbols. The linker_mark
5328 field will be set if these sections are to be included in the
5329 link, which will normally be the case. */
5330 if (obj_textsec (input_bfd
)->linker_mark
)
5332 if (! aout_link_input_section (flaginfo
, input_bfd
,
5333 obj_textsec (input_bfd
),
5335 exec_hdr (input_bfd
)->a_trsize
))
5338 if (obj_datasec (input_bfd
)->linker_mark
)
5340 if (! aout_link_input_section (flaginfo
, input_bfd
,
5341 obj_datasec (input_bfd
),
5343 exec_hdr (input_bfd
)->a_drsize
))
5347 /* If we are not keeping memory, we don't need the symbols any
5348 longer. We still need them if we are keeping memory, because the
5349 strings in the hash table point into them. */
5350 if (! flaginfo
->info
->keep_memory
)
5352 if (! aout_link_free_symbols (input_bfd
))
5359 /* Do the final link step. This is called on the output BFD. The
5360 INFO structure should point to a list of BFDs linked through the
5361 link.next field which can be used to find each BFD which takes part
5362 in the output. Also, each section in ABFD should point to a list
5363 of bfd_link_order structures which list all the input sections for
5364 the output section. */
5367 NAME (aout
, final_link
) (bfd
*abfd
,
5368 struct bfd_link_info
*info
,
5369 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
5371 struct aout_final_link_info aout_info
;
5372 bfd_boolean includes_hash_initialized
= FALSE
;
5374 bfd_size_type trsize
, drsize
;
5375 bfd_size_type max_contents_size
;
5376 bfd_size_type max_relocs_size
;
5377 bfd_size_type max_sym_count
;
5378 struct bfd_link_order
*p
;
5380 bfd_boolean have_link_order_relocs
;
5382 if (bfd_link_pic (info
))
5383 abfd
->flags
|= DYNAMIC
;
5385 aout_info
.info
= info
;
5386 aout_info
.output_bfd
= abfd
;
5387 aout_info
.contents
= NULL
;
5388 aout_info
.relocs
= NULL
;
5389 aout_info
.symbol_map
= NULL
;
5390 aout_info
.output_syms
= NULL
;
5392 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
5393 aout_link_includes_newfunc
,
5394 sizeof (struct aout_link_includes_entry
),
5397 includes_hash_initialized
= TRUE
;
5399 /* Figure out the largest section size. Also, if generating
5400 relocatable output, count the relocs. */
5403 max_contents_size
= 0;
5404 max_relocs_size
= 0;
5406 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5410 if (bfd_link_relocatable (info
))
5412 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5414 trsize
+= exec_hdr (sub
)->a_trsize
;
5415 drsize
+= exec_hdr (sub
)->a_drsize
;
5419 /* FIXME: We need to identify the .text and .data sections
5420 and call get_reloc_upper_bound and canonicalize_reloc to
5421 work out the number of relocs needed, and then multiply
5422 by the reloc size. */
5424 /* xgettext:c-format */
5425 (_("%pB: relocatable link from %s to %s not supported"),
5426 abfd
, sub
->xvec
->name
, abfd
->xvec
->name
);
5427 bfd_set_error (bfd_error_invalid_operation
);
5432 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
5434 sz
= obj_textsec (sub
)->size
;
5435 if (sz
> max_contents_size
)
5436 max_contents_size
= sz
;
5437 sz
= obj_datasec (sub
)->size
;
5438 if (sz
> max_contents_size
)
5439 max_contents_size
= sz
;
5441 sz
= exec_hdr (sub
)->a_trsize
;
5442 if (sz
> max_relocs_size
)
5443 max_relocs_size
= sz
;
5444 sz
= exec_hdr (sub
)->a_drsize
;
5445 if (sz
> max_relocs_size
)
5446 max_relocs_size
= sz
;
5448 sz
= obj_aout_external_sym_count (sub
);
5449 if (sz
> max_sym_count
)
5454 if (bfd_link_relocatable (info
))
5456 if (obj_textsec (abfd
) != NULL
)
5457 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
5458 ->map_head
.link_order
)
5459 * obj_reloc_entry_size (abfd
));
5460 if (obj_datasec (abfd
) != NULL
)
5461 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
5462 ->map_head
.link_order
)
5463 * obj_reloc_entry_size (abfd
));
5466 exec_hdr (abfd
)->a_trsize
= trsize
;
5467 exec_hdr (abfd
)->a_drsize
= drsize
;
5469 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
5471 /* Adjust the section sizes and vmas according to the magic number.
5472 This sets a_text, a_data and a_bss in the exec_hdr and sets the
5473 filepos for each section. */
5474 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
5477 /* The relocation and symbol file positions differ among a.out
5478 targets. We are passed a callback routine from the backend
5479 specific code to handle this.
5480 FIXME: At this point we do not know how much space the symbol
5481 table will require. This will not work for any (nonstandard)
5482 a.out target that needs to know the symbol table size before it
5483 can compute the relocation file positions. */
5484 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
5486 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
5487 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
5488 obj_sym_filepos (abfd
) = aout_info
.symoff
;
5490 /* We keep a count of the symbols as we output them. */
5491 obj_aout_external_sym_count (abfd
) = 0;
5493 /* We accumulate the string table as we write out the symbols. */
5494 aout_info
.strtab
= _bfd_stringtab_init ();
5495 if (aout_info
.strtab
== NULL
)
5498 /* Allocate buffers to hold section contents and relocs. */
5499 aout_info
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5500 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
5501 aout_info
.symbol_map
= (int *) bfd_malloc (max_sym_count
* sizeof (int));
5502 aout_info
.output_syms
= (struct external_nlist
*)
5503 bfd_malloc ((max_sym_count
+ 1) * sizeof (struct external_nlist
));
5504 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
5505 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
5506 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
5507 || aout_info
.output_syms
== NULL
)
5510 /* If we have a symbol named __DYNAMIC, force it out now. This is
5511 required by SunOS. Doing this here rather than in sunos.c is a
5512 hack, but it's easier than exporting everything which would be
5515 struct aout_link_hash_entry
*h
;
5517 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
5518 FALSE
, FALSE
, FALSE
);
5520 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
5523 /* The most time efficient way to do the link would be to read all
5524 the input object files into memory and then sort out the
5525 information into the output file. Unfortunately, that will
5526 probably use too much memory. Another method would be to step
5527 through everything that composes the text section and write it
5528 out, and then everything that composes the data section and write
5529 it out, and then write out the relocs, and then write out the
5530 symbols. Unfortunately, that requires reading stuff from each
5531 input file several times, and we will not be able to keep all the
5532 input files open simultaneously, and reopening them will be slow.
5534 What we do is basically process one input file at a time. We do
5535 everything we need to do with an input file once--copy over the
5536 section contents, handle the relocation information, and write
5537 out the symbols--and then we throw away the information we read
5538 from it. This approach requires a lot of lseeks of the output
5539 file, which is unfortunate but still faster than reopening a lot
5542 We use the output_has_begun field of the input BFDs to see
5543 whether we have already handled it. */
5544 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
5545 sub
->output_has_begun
= FALSE
;
5547 /* Mark all sections which are to be included in the link. This
5548 will normally be every section. We need to do this so that we
5549 can identify any sections which the linker has decided to not
5551 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5553 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5554 if (p
->type
== bfd_indirect_link_order
)
5555 p
->u
.indirect
.section
->linker_mark
= TRUE
;
5558 have_link_order_relocs
= FALSE
;
5559 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5561 for (p
= o
->map_head
.link_order
;
5565 if (p
->type
== bfd_indirect_link_order
5566 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
5567 == bfd_target_aout_flavour
))
5571 input_bfd
= p
->u
.indirect
.section
->owner
;
5572 if (! input_bfd
->output_has_begun
)
5574 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
5576 input_bfd
->output_has_begun
= TRUE
;
5579 else if (p
->type
== bfd_section_reloc_link_order
5580 || p
->type
== bfd_symbol_reloc_link_order
)
5582 /* These are handled below. */
5583 have_link_order_relocs
= TRUE
;
5587 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5593 /* Write out any symbols that we have not already written out. */
5594 bfd_hash_traverse (&info
->hash
->table
,
5595 aout_link_write_other_symbol
,
5598 /* Now handle any relocs we were asked to create by the linker.
5599 These did not come from any input file. We must do these after
5600 we have written out all the symbols, so that we know the symbol
5602 if (have_link_order_relocs
)
5604 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5606 for (p
= o
->map_head
.link_order
;
5610 if (p
->type
== bfd_section_reloc_link_order
5611 || p
->type
== bfd_symbol_reloc_link_order
)
5613 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
5620 if (aout_info
.contents
!= NULL
)
5622 free (aout_info
.contents
);
5623 aout_info
.contents
= NULL
;
5625 if (aout_info
.relocs
!= NULL
)
5627 free (aout_info
.relocs
);
5628 aout_info
.relocs
= NULL
;
5630 if (aout_info
.symbol_map
!= NULL
)
5632 free (aout_info
.symbol_map
);
5633 aout_info
.symbol_map
= NULL
;
5635 if (aout_info
.output_syms
!= NULL
)
5637 free (aout_info
.output_syms
);
5638 aout_info
.output_syms
= NULL
;
5640 if (includes_hash_initialized
)
5642 bfd_hash_table_free (&aout_info
.includes
.root
);
5643 includes_hash_initialized
= FALSE
;
5646 /* Finish up any dynamic linking we may be doing. */
5647 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
5649 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
5653 /* Update the header information. */
5654 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
5655 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
5656 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
5657 obj_textsec (abfd
)->reloc_count
=
5658 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
5659 obj_datasec (abfd
)->reloc_count
=
5660 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
5662 /* Write out the string table, unless there are no symbols. */
5663 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
5665 if (abfd
->symcount
> 0)
5667 if (!emit_stringtab (abfd
, aout_info
.strtab
))
5672 bfd_byte b
[BYTES_IN_WORD
];
5674 memset (b
, 0, BYTES_IN_WORD
);
5675 if (bfd_bwrite (b
, (bfd_size_type
) BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
5682 if (aout_info
.contents
!= NULL
)
5683 free (aout_info
.contents
);
5684 if (aout_info
.relocs
!= NULL
)
5685 free (aout_info
.relocs
);
5686 if (aout_info
.symbol_map
!= NULL
)
5687 free (aout_info
.symbol_map
);
5688 if (aout_info
.output_syms
!= NULL
)
5689 free (aout_info
.output_syms
);
5690 if (includes_hash_initialized
)
5691 bfd_hash_table_free (&aout_info
.includes
.root
);