1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sunos_big_vec
72 requires all the names from @file{aout32.c}, and produces the jump vector
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
86 When porting it to run on a new system, you must supply:
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected.
112 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
113 Doesn't matter what the setting of WP_TEXT is on output, but it'll
115 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
116 * Any BFD with both flags clear is OMAGIC.
117 (Just want to make these explicit, so the conditions tested in this
118 file make sense if you're more familiar with a.out than with BFD.) */
121 #define KEEPITTYPE int
123 #include <string.h> /* For strchr and friends */
130 #include "aout/aout64.h"
131 #include "aout/stab_gnu.h"
134 static boolean aout_get_external_symbols
PARAMS ((bfd
*));
135 static boolean translate_from_native_sym_flags
136 PARAMS ((bfd
*, aout_symbol_type
*));
137 static boolean translate_to_native_sym_flags
138 PARAMS ((bfd
*, asymbol
*, struct external_nlist
*));
145 The file @file{aoutx.h} provides for both the @emph{standard}
146 and @emph{extended} forms of a.out relocation records.
148 The standard records contain only an
149 address, a symbol index, and a type field. The extended records
150 (used on 29ks and sparcs) also have a full integer for an
154 #ifndef CTOR_TABLE_RELOC_HOWTO
155 #define CTOR_TABLE_RELOC_IDX 2
156 #define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \
157 ? howto_table_ext : howto_table_std) \
158 + CTOR_TABLE_RELOC_IDX)
161 #ifndef MY_swap_std_reloc_in
162 #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
165 #ifndef MY_swap_std_reloc_out
166 #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
169 #define howto_table_ext NAME(aout,ext_howto_table)
170 #define howto_table_std NAME(aout,std_howto_table)
172 reloc_howto_type howto_table_ext
[] =
174 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
175 HOWTO(RELOC_8
, 0, 0, 8, false, 0, complain_overflow_bitfield
,0,"8", false, 0,0x000000ff, false),
176 HOWTO(RELOC_16
, 0, 1, 16, false, 0, complain_overflow_bitfield
,0,"16", false, 0,0x0000ffff, false),
177 HOWTO(RELOC_32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"32", false, 0,0xffffffff, false),
178 HOWTO(RELOC_DISP8
, 0, 0, 8, true, 0, complain_overflow_signed
,0,"DISP8", false, 0,0x000000ff, false),
179 HOWTO(RELOC_DISP16
, 0, 1, 16, true, 0, complain_overflow_signed
,0,"DISP16", false, 0,0x0000ffff, false),
180 HOWTO(RELOC_DISP32
, 0, 2, 32, true, 0, complain_overflow_signed
,0,"DISP32", false, 0,0xffffffff, false),
181 HOWTO(RELOC_WDISP30
,2, 2, 30, true, 0, complain_overflow_signed
,0,"WDISP30", false, 0,0x3fffffff, false),
182 HOWTO(RELOC_WDISP22
,2, 2, 22, true, 0, complain_overflow_signed
,0,"WDISP22", false, 0,0x003fffff, false),
183 HOWTO(RELOC_HI22
, 10, 2, 22, false, 0, complain_overflow_bitfield
,0,"HI22", false, 0,0x003fffff, false),
184 HOWTO(RELOC_22
, 0, 2, 22, false, 0, complain_overflow_bitfield
,0,"22", false, 0,0x003fffff, false),
185 HOWTO(RELOC_13
, 0, 2, 13, false, 0, complain_overflow_bitfield
,0,"13", false, 0,0x00001fff, false),
186 HOWTO(RELOC_LO10
, 0, 2, 10, false, 0, complain_overflow_dont
,0,"LO10", false, 0,0x000003ff, false),
187 HOWTO(RELOC_SFA_BASE
,0, 2, 32, false, 0, complain_overflow_bitfield
,0,"SFA_BASE", false, 0,0xffffffff, false),
188 HOWTO(RELOC_SFA_OFF13
,0,2, 32, false, 0, complain_overflow_bitfield
,0,"SFA_OFF13",false, 0,0xffffffff, false),
189 HOWTO(RELOC_BASE10
, 0, 2, 16, false, 0, complain_overflow_bitfield
,0,"BASE10", false, 0,0x0000ffff, false),
190 HOWTO(RELOC_BASE13
, 0, 2, 13, false, 0, complain_overflow_bitfield
,0,"BASE13", false, 0,0x00001fff, false),
191 HOWTO(RELOC_BASE22
, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"BASE22", false, 0,0x00000000, false),
192 HOWTO(RELOC_PC10
, 0, 2, 10, false, 0, complain_overflow_bitfield
,0,"PC10", false, 0,0x000003ff, false),
193 HOWTO(RELOC_PC22
, 0, 2, 22, false, 0, complain_overflow_bitfield
,0,"PC22", false, 0,0x003fffff, false),
194 HOWTO(RELOC_JMP_TBL
,0, 2, 32, false, 0, complain_overflow_bitfield
,0,"JMP_TBL", false, 0,0xffffffff, false),
195 HOWTO(RELOC_SEGOFF16
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"SEGOFF16", false, 0,0x00000000, false),
196 HOWTO(RELOC_GLOB_DAT
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"GLOB_DAT", false, 0,0x00000000, false),
197 HOWTO(RELOC_JMP_SLOT
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"JMP_SLOT", false, 0,0x00000000, false),
198 HOWTO(RELOC_RELATIVE
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"RELATIVE", false, 0,0x00000000, false),
201 /* Convert standard reloc records to "arelent" format (incl byte swap). */
203 reloc_howto_type howto_table_std
[] = {
204 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
205 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield
,0,"8", true, 0x000000ff,0x000000ff, false),
206 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield
,0,"16", true, 0x0000ffff,0x0000ffff, false),
207 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"32", true, 0xffffffff,0xffffffff, false),
208 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield
,0,"64", true, 0xdeaddead,0xdeaddead, false),
209 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed
, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
210 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed
, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
211 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed
, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
212 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed
, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
213 HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"GOT_REL", false, 0,0x00000000, false),
214 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield
,0,"BASE16", false,0xffffffff,0xffffffff, false),
215 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"BASE32", false,0xffffffff,0xffffffff, false),
221 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"JMP_TABLE", false, 0,0x00000000, false),
229 { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 },
230 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"RELATIVE", false, 0,0x00000000, false),
238 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"BASEREL", false, 0,0x00000000, false),
241 #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
243 CONST
struct reloc_howto_struct
*
244 NAME(aout
,reloc_type_lookup
) (abfd
,code
)
246 bfd_reloc_code_real_type code
;
248 #define EXT(i,j) case i: return &howto_table_ext[j]
249 #define STD(i,j) case i: return &howto_table_std[j]
250 int ext
= obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
;
251 if (code
== BFD_RELOC_CTOR
)
252 switch (bfd_get_arch_info (abfd
)->bits_per_address
)
264 EXT (BFD_RELOC_32
, 2);
265 EXT (BFD_RELOC_HI22
, 8);
266 EXT (BFD_RELOC_LO10
, 11);
267 EXT (BFD_RELOC_32_PCREL_S2
, 6);
268 EXT (BFD_RELOC_SPARC_WDISP22
, 7);
269 EXT (BFD_RELOC_SPARC13
, 10);
270 EXT (BFD_RELOC_SPARC_BASE13
, 15);
271 default: return (CONST
struct reloc_howto_struct
*) 0;
277 STD (BFD_RELOC_16
, 1);
278 STD (BFD_RELOC_32
, 2);
279 STD (BFD_RELOC_8_PCREL
, 4);
280 STD (BFD_RELOC_16_PCREL
, 5);
281 STD (BFD_RELOC_32_PCREL
, 6);
282 STD (BFD_RELOC_16_BASEREL
, 9);
283 STD (BFD_RELOC_32_BASEREL
, 10);
284 default: return (CONST
struct reloc_howto_struct
*) 0;
290 Internal entry points
293 @file{aoutx.h} exports several routines for accessing the
294 contents of an a.out file, which are gathered and exported in
295 turn by various format specific files (eg sunos.c).
301 aout_@var{size}_swap_exec_header_in
304 void aout_@var{size}_swap_exec_header_in,
306 struct external_exec *raw_bytes,
307 struct internal_exec *execp);
310 Swap the information in an executable header @var{raw_bytes} taken
311 from a raw byte stream memory image into the internal exec header
312 structure @var{execp}.
315 #ifndef NAME_swap_exec_header_in
317 NAME(aout
,swap_exec_header_in
) (abfd
, raw_bytes
, execp
)
319 struct external_exec
*raw_bytes
;
320 struct internal_exec
*execp
;
322 struct external_exec
*bytes
= (struct external_exec
*)raw_bytes
;
324 /* The internal_exec structure has some fields that are unused in this
325 configuration (IE for i960), so ensure that all such uninitialized
326 fields are zero'd out. There are places where two of these structs
327 are memcmp'd, and thus the contents do matter. */
328 memset ((PTR
) execp
, 0, sizeof (struct internal_exec
));
329 /* Now fill in fields in the execp, from the bytes in the raw data. */
330 execp
->a_info
= bfd_h_get_32 (abfd
, bytes
->e_info
);
331 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
332 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
333 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
334 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
335 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
336 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
337 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
339 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
344 aout_@var{size}_swap_exec_header_out
347 void aout_@var{size}_swap_exec_header_out
349 struct internal_exec *execp,
350 struct external_exec *raw_bytes);
353 Swap the information in an internal exec header structure
354 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
357 NAME(aout
,swap_exec_header_out
) (abfd
, execp
, raw_bytes
)
359 struct internal_exec
*execp
;
360 struct external_exec
*raw_bytes
;
362 struct external_exec
*bytes
= (struct external_exec
*)raw_bytes
;
364 /* Now fill in fields in the raw data, from the fields in the exec struct. */
365 bfd_h_put_32 (abfd
, execp
->a_info
, bytes
->e_info
);
366 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
367 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
368 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
369 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
370 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
371 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
372 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
375 /* Make all the section for an a.out file. */
378 NAME(aout
,make_sections
) (abfd
)
381 if (obj_textsec (abfd
) == (asection
*) NULL
382 && bfd_make_section (abfd
, ".text") == (asection
*) NULL
)
384 if (obj_datasec (abfd
) == (asection
*) NULL
385 && bfd_make_section (abfd
, ".data") == (asection
*) NULL
)
387 if (obj_bsssec (abfd
) == (asection
*) NULL
388 && bfd_make_section (abfd
, ".bss") == (asection
*) NULL
)
395 aout_@var{size}_some_aout_object_p
398 const bfd_target *aout_@var{size}_some_aout_object_p
400 const bfd_target *(*callback_to_real_object_p)());
403 Some a.out variant thinks that the file open in @var{abfd}
404 checking is an a.out file. Do some more checking, and set up
405 for access if it really is. Call back to the calling
406 environment's "finish up" function just before returning, to
407 handle any last-minute setup.
411 NAME(aout
,some_aout_object_p
) (abfd
, execp
, callback_to_real_object_p
)
413 struct internal_exec
*execp
;
414 const bfd_target
*(*callback_to_real_object_p
) PARAMS ((bfd
*));
416 struct aout_data_struct
*rawptr
, *oldrawptr
;
417 const bfd_target
*result
;
419 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, sizeof (struct aout_data_struct
));
420 if (rawptr
== NULL
) {
421 bfd_set_error (bfd_error_no_memory
);
425 oldrawptr
= abfd
->tdata
.aout_data
;
426 abfd
->tdata
.aout_data
= rawptr
;
428 /* Copy the contents of the old tdata struct.
429 In particular, we want the subformat, since for hpux it was set in
430 hp300hpux.c:swap_exec_header_in and will be used in
431 hp300hpux.c:callback. */
432 if (oldrawptr
!= NULL
)
433 *abfd
->tdata
.aout_data
= *oldrawptr
;
435 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
436 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
; /* Copy in the internal_exec struct */
437 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
439 /* Set the file flags */
440 abfd
->flags
= NO_FLAGS
;
441 if (execp
->a_drsize
|| execp
->a_trsize
)
442 abfd
->flags
|= HAS_RELOC
;
443 /* Setting of EXEC_P has been deferred to the bottom of this function */
445 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
446 if (N_DYNAMIC(*execp
))
447 abfd
->flags
|= DYNAMIC
;
449 if (N_MAGIC (*execp
) == ZMAGIC
)
451 abfd
->flags
|= D_PAGED
| WP_TEXT
;
452 adata (abfd
).magic
= z_magic
;
454 else if (N_MAGIC (*execp
) == QMAGIC
)
456 abfd
->flags
|= D_PAGED
| WP_TEXT
;
457 adata (abfd
).magic
= z_magic
;
458 adata (abfd
).subformat
= q_magic_format
;
460 else if (N_MAGIC (*execp
) == NMAGIC
)
462 abfd
->flags
|= WP_TEXT
;
463 adata (abfd
).magic
= n_magic
;
465 else if (N_MAGIC (*execp
) == OMAGIC
466 || N_MAGIC (*execp
) == BMAGIC
)
467 adata (abfd
).magic
= o_magic
;
470 /* Should have been checked with N_BADMAG before this routine
475 bfd_get_start_address (abfd
) = execp
->a_entry
;
477 obj_aout_symbols (abfd
) = (aout_symbol_type
*)NULL
;
478 bfd_get_symcount (abfd
) = execp
->a_syms
/ sizeof (struct external_nlist
);
480 /* The default relocation entry size is that of traditional V7 Unix. */
481 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
483 /* The default symbol entry size is that of traditional Unix. */
484 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
486 obj_aout_external_syms (abfd
) = NULL
;
487 obj_aout_external_strings (abfd
) = NULL
;
488 obj_aout_sym_hashes (abfd
) = NULL
;
490 if (! NAME(aout
,make_sections
) (abfd
))
493 obj_datasec (abfd
)->_raw_size
= execp
->a_data
;
494 obj_bsssec (abfd
)->_raw_size
= execp
->a_bss
;
496 obj_textsec (abfd
)->flags
=
497 (execp
->a_trsize
!= 0
498 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
499 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
500 obj_datasec (abfd
)->flags
=
501 (execp
->a_drsize
!= 0
502 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
503 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
504 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
506 #ifdef THIS_IS_ONLY_DOCUMENTATION
507 /* The common code can't fill in these things because they depend
508 on either the start address of the text segment, the rounding
509 up of virtual addresses between segments, or the starting file
510 position of the text segment -- all of which varies among different
511 versions of a.out. */
513 /* Call back to the format-dependent code to fill in the rest of the
514 fields and do any further cleanup. Things that should be filled
515 in by the callback: */
517 struct exec
*execp
= exec_hdr (abfd
);
519 obj_textsec (abfd
)->size
= N_TXTSIZE(*execp
);
520 obj_textsec (abfd
)->raw_size
= N_TXTSIZE(*execp
);
521 /* data and bss are already filled in since they're so standard */
523 /* The virtual memory addresses of the sections */
524 obj_textsec (abfd
)->vma
= N_TXTADDR(*execp
);
525 obj_datasec (abfd
)->vma
= N_DATADDR(*execp
);
526 obj_bsssec (abfd
)->vma
= N_BSSADDR(*execp
);
528 /* The file offsets of the sections */
529 obj_textsec (abfd
)->filepos
= N_TXTOFF(*execp
);
530 obj_datasec (abfd
)->filepos
= N_DATOFF(*execp
);
532 /* The file offsets of the relocation info */
533 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF(*execp
);
534 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF(*execp
);
536 /* The file offsets of the string table and symbol table. */
537 obj_str_filepos (abfd
) = N_STROFF (*execp
);
538 obj_sym_filepos (abfd
) = N_SYMOFF (*execp
);
540 /* Determine the architecture and machine type of the object file. */
541 switch (N_MACHTYPE (*exec_hdr (abfd
))) {
543 abfd
->obj_arch
= bfd_arch_obscure
;
547 adata(abfd
)->page_size
= PAGE_SIZE
;
548 adata(abfd
)->segment_size
= SEGMENT_SIZE
;
549 adata(abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
553 /* The architecture is encoded in various ways in various a.out variants,
554 or is not encoded at all in some of them. The relocation size depends
555 on the architecture and the a.out variant. Finally, the return value
556 is the bfd_target vector in use. If an error occurs, return zero and
557 set bfd_error to the appropriate error code.
559 Formats such as b.out, which have additional fields in the a.out
560 header, should cope with them in this callback as well. */
561 #endif /* DOCUMENTATION */
563 result
= (*callback_to_real_object_p
)(abfd
);
566 /* The original heuristic doesn't work in some important cases. The
567 * a.out file has no information about the text start address. For
568 * files (like kernels) linked to non-standard addresses (ld -Ttext
569 * nnn) the entry point may not be between the default text start
570 * (obj_textsec(abfd)->vma) and (obj_textsec(abfd)->vma) + text size
571 * This is not just a mach issue. Many kernels are loaded at non
572 * standard addresses.
575 struct stat stat_buf
;
577 && (fstat(fileno((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
578 && ((stat_buf
.st_mode
& 0111) != 0))
579 abfd
->flags
|= EXEC_P
;
581 #else /* ! defined (STAT_FOR_EXEC) */
582 /* Now that the segment addresses have been worked out, take a better
583 guess at whether the file is executable. If the entry point
584 is within the text segment, assume it is. (This makes files
585 executable even if their entry point address is 0, as long as
586 their text starts at zero.)
588 At some point we should probably break down and stat the file and
589 declare it executable if (one of) its 'x' bits are on... */
590 if ((execp
->a_entry
>= obj_textsec(abfd
)->vma
) &&
591 (execp
->a_entry
< obj_textsec(abfd
)->vma
+ obj_textsec(abfd
)->_raw_size
))
592 abfd
->flags
|= EXEC_P
;
593 #endif /* ! defined (STAT_FOR_EXEC) */
596 #if 0 /* These should be set correctly anyways. */
597 abfd
->sections
= obj_textsec (abfd
);
598 obj_textsec (abfd
)->next
= obj_datasec (abfd
);
599 obj_datasec (abfd
)->next
= obj_bsssec (abfd
);
605 abfd
->tdata
.aout_data
= oldrawptr
;
612 aout_@var{size}_mkobject
615 boolean aout_@var{size}_mkobject, (bfd *abfd);
618 Initialize BFD @var{abfd} for use with a.out files.
622 NAME(aout
,mkobject
) (abfd
)
625 struct aout_data_struct
*rawptr
;
627 bfd_set_error (bfd_error_system_call
);
629 /* Use an intermediate variable for clarity */
630 rawptr
= (struct aout_data_struct
*)bfd_zalloc (abfd
, sizeof (struct aout_data_struct
));
632 if (rawptr
== NULL
) {
633 bfd_set_error (bfd_error_no_memory
);
637 abfd
->tdata
.aout_data
= rawptr
;
638 exec_hdr (abfd
) = &(rawptr
->e
);
640 obj_textsec (abfd
) = (asection
*)NULL
;
641 obj_datasec (abfd
) = (asection
*)NULL
;
642 obj_bsssec (abfd
) = (asection
*)NULL
;
650 aout_@var{size}_machine_type
653 enum machine_type aout_@var{size}_machine_type
654 (enum bfd_architecture arch,
655 unsigned long machine));
658 Keep track of machine architecture and machine type for
659 a.out's. Return the <<machine_type>> for a particular
660 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
661 and machine can't be represented in a.out format.
663 If the architecture is understood, machine type 0 (default)
664 is always understood.
668 NAME(aout
,machine_type
) (arch
, machine
, unknown
)
669 enum bfd_architecture arch
;
670 unsigned long machine
;
673 enum machine_type arch_flags
;
675 arch_flags
= M_UNKNOWN
;
680 if (machine
== 0) arch_flags
= M_SPARC
;
685 case 0: arch_flags
= M_68010
; break;
686 case 68000: arch_flags
= M_UNKNOWN
; *unknown
= false; break;
687 case 68010: arch_flags
= M_68010
; break;
688 case 68020: arch_flags
= M_68020
; break;
689 default: arch_flags
= M_UNKNOWN
; break;
694 if (machine
== 0) arch_flags
= M_386
;
698 if (machine
== 0) arch_flags
= M_29K
;
705 case 3000: arch_flags
= M_MIPS1
; break;
708 case 6000: arch_flags
= M_MIPS2
; break;
709 default: arch_flags
= M_UNKNOWN
; break;
715 case 0: arch_flags
= M_NS32532
; break;
716 case 32032: arch_flags
= M_NS32032
; break;
717 case 32532: arch_flags
= M_NS32532
; break;
718 default: arch_flags
= M_UNKNOWN
; break;
723 arch_flags
= M_UNKNOWN
;
726 if (arch_flags
!= M_UNKNOWN
)
735 aout_@var{size}_set_arch_mach
738 boolean aout_@var{size}_set_arch_mach,
740 enum bfd_architecture arch,
741 unsigned long machine));
744 Set the architecture and the machine of the BFD @var{abfd} to the
745 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
746 can support the architecture required.
750 NAME(aout
,set_arch_mach
) (abfd
, arch
, machine
)
752 enum bfd_architecture arch
;
753 unsigned long machine
;
755 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
758 if (arch
!= bfd_arch_unknown
)
762 NAME(aout
,machine_type
) (arch
, machine
, &unknown
);
767 /* Determine the size of a relocation entry */
772 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
775 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
779 return (*aout_backend_info(abfd
)->set_sizes
) (abfd
);
783 adjust_o_magic (abfd
, execp
)
785 struct internal_exec
*execp
;
787 file_ptr pos
= adata (abfd
).exec_bytes_size
;
792 obj_textsec(abfd
)->filepos
= pos
;
793 pos
+= obj_textsec(abfd
)->_raw_size
;
794 vma
+= obj_textsec(abfd
)->_raw_size
;
797 if (!obj_datasec(abfd
)->user_set_vma
)
799 #if 0 /* ?? Does alignment in the file image really matter? */
800 pad
= align_power (vma
, obj_datasec(abfd
)->alignment_power
) - vma
;
802 obj_textsec(abfd
)->_raw_size
+= pad
;
805 obj_datasec(abfd
)->vma
= vma
;
807 obj_datasec(abfd
)->filepos
= pos
;
808 pos
+= obj_datasec(abfd
)->_raw_size
;
809 vma
+= obj_datasec(abfd
)->_raw_size
;
812 if (!obj_bsssec(abfd
)->user_set_vma
)
815 pad
= align_power (vma
, obj_bsssec(abfd
)->alignment_power
) - vma
;
817 obj_datasec(abfd
)->_raw_size
+= pad
;
820 obj_bsssec(abfd
)->vma
= vma
;
824 /* The VMA of the .bss section is set by the the VMA of the
825 .data section plus the size of the .data section. We may
826 need to add padding bytes to make this true. */
827 pad
= obj_bsssec (abfd
)->vma
- vma
;
830 obj_datasec (abfd
)->_raw_size
+= pad
;
834 obj_bsssec(abfd
)->filepos
= pos
;
836 /* Fix up the exec header. */
837 execp
->a_text
= obj_textsec(abfd
)->_raw_size
;
838 execp
->a_data
= obj_datasec(abfd
)->_raw_size
;
839 execp
->a_bss
= obj_bsssec(abfd
)->_raw_size
;
840 N_SET_MAGIC (*execp
, OMAGIC
);
844 adjust_z_magic (abfd
, execp
)
846 struct internal_exec
*execp
;
848 bfd_size_type data_pad
, text_pad
;
850 CONST
struct aout_backend_data
*abdp
;
851 int ztih
; /* Nonzero if text includes exec header. */
853 abdp
= aout_backend_info (abfd
);
857 && (abdp
->text_includes_header
858 || obj_aout_subformat (abfd
) == q_magic_format
));
859 obj_textsec(abfd
)->filepos
= (ztih
860 ? adata(abfd
).exec_bytes_size
861 : adata(abfd
).zmagic_disk_block_size
);
862 if (! obj_textsec(abfd
)->user_set_vma
)
864 /* ?? Do we really need to check for relocs here? */
865 obj_textsec(abfd
)->vma
= ((abfd
->flags
& HAS_RELOC
)
868 ? (abdp
->default_text_vma
869 + adata(abfd
).exec_bytes_size
)
870 : abdp
->default_text_vma
));
875 /* The .text section is being loaded at an unusual address. We
876 may need to pad it such that the .data section starts at a page
879 text_pad
= ((obj_textsec (abfd
)->filepos
- obj_textsec (abfd
)->vma
)
880 & (adata (abfd
).page_size
- 1));
882 text_pad
= ((- obj_textsec (abfd
)->vma
)
883 & (adata (abfd
).page_size
- 1));
886 /* Find start of data. */
889 text_end
= obj_textsec (abfd
)->filepos
+ obj_textsec (abfd
)->_raw_size
;
890 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
894 /* Note that if page_size == zmagic_disk_block_size, then
895 filepos == page_size, and this case is the same as the ztih
897 text_end
= obj_textsec (abfd
)->_raw_size
;
898 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
899 text_end
+= obj_textsec (abfd
)->filepos
;
901 obj_textsec(abfd
)->_raw_size
+= text_pad
;
902 text_end
+= text_pad
;
905 if (!obj_datasec(abfd
)->user_set_vma
)
908 vma
= obj_textsec(abfd
)->vma
+ obj_textsec(abfd
)->_raw_size
;
909 obj_datasec(abfd
)->vma
= BFD_ALIGN (vma
, adata(abfd
).segment_size
);
911 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
913 text_pad
= (obj_datasec(abfd
)->vma
914 - obj_textsec(abfd
)->vma
915 - obj_textsec(abfd
)->_raw_size
);
916 obj_textsec(abfd
)->_raw_size
+= text_pad
;
918 obj_datasec(abfd
)->filepos
= (obj_textsec(abfd
)->filepos
919 + obj_textsec(abfd
)->_raw_size
);
921 /* Fix up exec header while we're at it. */
922 execp
->a_text
= obj_textsec(abfd
)->_raw_size
;
923 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
924 execp
->a_text
+= adata(abfd
).exec_bytes_size
;
925 if (obj_aout_subformat (abfd
) == q_magic_format
)
926 N_SET_MAGIC (*execp
, QMAGIC
);
928 N_SET_MAGIC (*execp
, ZMAGIC
);
930 /* Spec says data section should be rounded up to page boundary. */
931 obj_datasec(abfd
)->_raw_size
932 = align_power (obj_datasec(abfd
)->_raw_size
,
933 obj_bsssec(abfd
)->alignment_power
);
934 execp
->a_data
= BFD_ALIGN (obj_datasec(abfd
)->_raw_size
,
935 adata(abfd
).page_size
);
936 data_pad
= execp
->a_data
- obj_datasec(abfd
)->_raw_size
;
939 if (!obj_bsssec(abfd
)->user_set_vma
)
940 obj_bsssec(abfd
)->vma
= (obj_datasec(abfd
)->vma
941 + obj_datasec(abfd
)->_raw_size
);
942 /* If the BSS immediately follows the data section and extra space
943 in the page is left after the data section, fudge data
944 in the header so that the bss section looks smaller by that
945 amount. We'll start the bss section there, and lie to the OS.
946 (Note that a linker script, as well as the above assignment,
947 could have explicitly set the BSS vma to immediately follow
948 the data section.) */
949 if (align_power (obj_bsssec(abfd
)->vma
, obj_bsssec(abfd
)->alignment_power
)
950 == obj_datasec(abfd
)->vma
+ obj_datasec(abfd
)->_raw_size
)
951 execp
->a_bss
= (data_pad
> obj_bsssec(abfd
)->_raw_size
) ? 0 :
952 obj_bsssec(abfd
)->_raw_size
- data_pad
;
954 execp
->a_bss
= obj_bsssec(abfd
)->_raw_size
;
958 adjust_n_magic (abfd
, execp
)
960 struct internal_exec
*execp
;
962 file_ptr pos
= adata(abfd
).exec_bytes_size
;
967 obj_textsec(abfd
)->filepos
= pos
;
968 if (!obj_textsec(abfd
)->user_set_vma
)
969 obj_textsec(abfd
)->vma
= vma
;
971 vma
= obj_textsec(abfd
)->vma
;
972 pos
+= obj_textsec(abfd
)->_raw_size
;
973 vma
+= obj_textsec(abfd
)->_raw_size
;
976 obj_datasec(abfd
)->filepos
= pos
;
977 if (!obj_datasec(abfd
)->user_set_vma
)
978 obj_datasec(abfd
)->vma
= BFD_ALIGN (vma
, adata(abfd
).segment_size
);
979 vma
= obj_datasec(abfd
)->vma
;
981 /* Since BSS follows data immediately, see if it needs alignment. */
982 vma
+= obj_datasec(abfd
)->_raw_size
;
983 pad
= align_power (vma
, obj_bsssec(abfd
)->alignment_power
) - vma
;
984 obj_datasec(abfd
)->_raw_size
+= pad
;
985 pos
+= obj_datasec(abfd
)->_raw_size
;
988 if (!obj_bsssec(abfd
)->user_set_vma
)
989 obj_bsssec(abfd
)->vma
= vma
;
991 vma
= obj_bsssec(abfd
)->vma
;
993 /* Fix up exec header. */
994 execp
->a_text
= obj_textsec(abfd
)->_raw_size
;
995 execp
->a_data
= obj_datasec(abfd
)->_raw_size
;
996 execp
->a_bss
= obj_bsssec(abfd
)->_raw_size
;
997 N_SET_MAGIC (*execp
, NMAGIC
);
1001 NAME(aout
,adjust_sizes_and_vmas
) (abfd
, text_size
, text_end
)
1003 bfd_size_type
*text_size
;
1006 struct internal_exec
*execp
= exec_hdr (abfd
);
1008 if (! NAME(aout
,make_sections
) (abfd
))
1011 if (adata(abfd
).magic
!= undecided_magic
)
1014 obj_textsec(abfd
)->_raw_size
=
1015 align_power(obj_textsec(abfd
)->_raw_size
,
1016 obj_textsec(abfd
)->alignment_power
);
1018 *text_size
= obj_textsec (abfd
)->_raw_size
;
1019 /* Rule (heuristic) for when to pad to a new page. Note that there
1020 are (at least) two ways demand-paged (ZMAGIC) files have been
1021 handled. Most Berkeley-based systems start the text segment at
1022 (PAGE_SIZE). However, newer versions of SUNOS start the text
1023 segment right after the exec header; the latter is counted in the
1024 text segment size, and is paged in by the kernel with the rest of
1027 /* This perhaps isn't the right way to do this, but made it simpler for me
1028 to understand enough to implement it. Better would probably be to go
1029 right from BFD flags to alignment/positioning characteristics. But the
1030 old code was sloppy enough about handling the flags, and had enough
1031 other magic, that it was a little hard for me to understand. I think
1032 I understand it better now, but I haven't time to do the cleanup this
1035 if (abfd
->flags
& D_PAGED
)
1036 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1037 adata(abfd
).magic
= z_magic
;
1038 else if (abfd
->flags
& WP_TEXT
)
1039 adata(abfd
).magic
= n_magic
;
1041 adata(abfd
).magic
= o_magic
;
1043 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1045 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1047 switch (adata(abfd
).magic
) {
1048 case n_magic
: str
= "NMAGIC"; break;
1049 case o_magic
: str
= "OMAGIC"; break;
1050 case z_magic
: str
= "ZMAGIC"; break;
1055 obj_textsec(abfd
)->vma
, obj_textsec(abfd
)->_raw_size
,
1056 obj_textsec(abfd
)->alignment_power
,
1057 obj_datasec(abfd
)->vma
, obj_datasec(abfd
)->_raw_size
,
1058 obj_datasec(abfd
)->alignment_power
,
1059 obj_bsssec(abfd
)->vma
, obj_bsssec(abfd
)->_raw_size
,
1060 obj_bsssec(abfd
)->alignment_power
);
1064 switch (adata(abfd
).magic
)
1067 adjust_o_magic (abfd
, execp
);
1070 adjust_z_magic (abfd
, execp
);
1073 adjust_n_magic (abfd
, execp
);
1079 #ifdef BFD_AOUT_DEBUG
1080 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1081 obj_textsec(abfd
)->vma
, obj_textsec(abfd
)->_raw_size
,
1082 obj_textsec(abfd
)->filepos
,
1083 obj_datasec(abfd
)->vma
, obj_datasec(abfd
)->_raw_size
,
1084 obj_datasec(abfd
)->filepos
,
1085 obj_bsssec(abfd
)->vma
, obj_bsssec(abfd
)->_raw_size
);
1093 aout_@var{size}_new_section_hook
1096 boolean aout_@var{size}_new_section_hook,
1098 asection *newsect));
1101 Called by the BFD in response to a @code{bfd_make_section}
1105 NAME(aout
,new_section_hook
) (abfd
, newsect
)
1109 /* align to double at least */
1110 newsect
->alignment_power
= bfd_get_arch_info(abfd
)->section_align_power
;
1113 if (bfd_get_format (abfd
) == bfd_object
)
1115 if (obj_textsec(abfd
) == NULL
&& !strcmp(newsect
->name
, ".text")) {
1116 obj_textsec(abfd
)= newsect
;
1117 newsect
->target_index
= N_TEXT
;
1121 if (obj_datasec(abfd
) == NULL
&& !strcmp(newsect
->name
, ".data")) {
1122 obj_datasec(abfd
) = newsect
;
1123 newsect
->target_index
= N_DATA
;
1127 if (obj_bsssec(abfd
) == NULL
&& !strcmp(newsect
->name
, ".bss")) {
1128 obj_bsssec(abfd
) = newsect
;
1129 newsect
->target_index
= N_BSS
;
1135 /* We allow more than three sections internally */
1140 NAME(aout
,set_section_contents
) (abfd
, section
, location
, offset
, count
)
1145 bfd_size_type count
;
1148 bfd_size_type text_size
;
1150 if (abfd
->output_has_begun
== false)
1152 if (NAME(aout
,adjust_sizes_and_vmas
) (abfd
,
1154 &text_end
) == false)
1158 /* regardless, once we know what we're doing, we might as well get going */
1159 if (section
!= obj_bsssec(abfd
))
1161 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0)
1165 return (bfd_write ((PTR
)location
, 1, count
, abfd
) == count
) ?
1173 /* Read the external symbols from an a.out file. */
1176 aout_get_external_symbols (abfd
)
1179 if (obj_aout_external_syms (abfd
) == (struct external_nlist
*) NULL
)
1181 bfd_size_type count
;
1182 struct external_nlist
*syms
;
1184 count
= exec_hdr (abfd
)->a_syms
/ EXTERNAL_NLIST_SIZE
;
1186 /* We allocate using malloc to make the values easy to free
1187 later on. If we put them on the obstack it might not be
1188 possible to free them. */
1189 syms
= ((struct external_nlist
*)
1190 malloc ((size_t) count
* EXTERNAL_NLIST_SIZE
));
1191 if (syms
== (struct external_nlist
*) NULL
&& count
!= 0)
1193 bfd_set_error (bfd_error_no_memory
);
1197 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1198 || (bfd_read (syms
, 1, exec_hdr (abfd
)->a_syms
, abfd
)
1199 != exec_hdr (abfd
)->a_syms
))
1205 obj_aout_external_syms (abfd
) = syms
;
1206 obj_aout_external_sym_count (abfd
) = count
;
1209 if (obj_aout_external_strings (abfd
) == NULL
1210 && exec_hdr (abfd
)->a_syms
!= 0)
1212 unsigned char string_chars
[BYTES_IN_WORD
];
1213 bfd_size_type stringsize
;
1216 /* Get the size of the strings. */
1217 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1218 || (bfd_read ((PTR
) string_chars
, BYTES_IN_WORD
, 1, abfd
)
1221 stringsize
= GET_WORD (abfd
, string_chars
);
1223 strings
= (char *) malloc ((size_t) stringsize
+ 1);
1224 if (strings
== NULL
)
1226 bfd_set_error (bfd_error_no_memory
);
1230 /* Skip space for the string count in the buffer for convenience
1231 when using indexes. */
1232 if (bfd_read (strings
+ BYTES_IN_WORD
, 1, stringsize
- BYTES_IN_WORD
,
1234 != stringsize
- BYTES_IN_WORD
)
1240 /* Sanity preservation. */
1241 strings
[stringsize
] = '\0';
1243 obj_aout_external_strings (abfd
) = strings
;
1244 obj_aout_external_string_size (abfd
) = stringsize
;
1250 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1251 and symbol->value fields of CACHE_PTR will be set from the a.out
1252 nlist structure. This function is responsible for setting
1253 symbol->flags and symbol->section, and adjusting symbol->value. */
1256 translate_from_native_sym_flags (abfd
, cache_ptr
)
1258 aout_symbol_type
*cache_ptr
;
1262 if ((cache_ptr
->type
& N_STAB
) != 0
1263 || cache_ptr
->type
== N_FN
)
1267 /* This is a debugging symbol. */
1269 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1271 /* Work out the symbol section. */
1272 switch (cache_ptr
->type
& N_TYPE
)
1276 sec
= obj_textsec (abfd
);
1279 sec
= obj_datasec (abfd
);
1282 sec
= obj_bsssec (abfd
);
1286 sec
= bfd_abs_section_ptr
;
1290 cache_ptr
->symbol
.section
= sec
;
1291 cache_ptr
->symbol
.value
-= sec
->vma
;
1296 /* Get the default visibility. This does not apply to all types, so
1297 we just hold it in a local variable to use if wanted. */
1298 if ((cache_ptr
->type
& N_EXT
) == 0)
1299 visible
= BSF_LOCAL
;
1301 visible
= BSF_GLOBAL
;
1303 switch (cache_ptr
->type
)
1306 case N_ABS
: case N_ABS
| N_EXT
:
1307 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1308 cache_ptr
->symbol
.flags
= visible
;
1311 case N_UNDF
| N_EXT
:
1312 if (cache_ptr
->symbol
.value
!= 0)
1314 /* This is a common symbol. */
1315 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1316 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1320 cache_ptr
->symbol
.flags
= 0;
1321 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1325 case N_TEXT
: case N_TEXT
| N_EXT
:
1326 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1327 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1328 cache_ptr
->symbol
.flags
= visible
;
1331 /* N_SETV symbols used to represent set vectors placed in the
1332 data section. They are no longer generated. Theoretically,
1333 it was possible to extract the entries and combine them with
1334 new ones, although I don't know if that was ever actually
1335 done. Unless that feature is restored, treat them as data
1337 case N_SETV
: case N_SETV
| N_EXT
:
1338 case N_DATA
: case N_DATA
| N_EXT
:
1339 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1340 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1341 cache_ptr
->symbol
.flags
= visible
;
1344 case N_BSS
: case N_BSS
| N_EXT
:
1345 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1346 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1347 cache_ptr
->symbol
.flags
= visible
;
1350 case N_SETA
: case N_SETA
| N_EXT
:
1351 case N_SETT
: case N_SETT
| N_EXT
:
1352 case N_SETD
: case N_SETD
| N_EXT
:
1353 case N_SETB
: case N_SETB
| N_EXT
:
1356 arelent_chain
*reloc
;
1357 asection
*into_section
;
1359 /* This is a set symbol. The name of the symbol is the name
1360 of the set (e.g., __CTOR_LIST__). The value of the symbol
1361 is the value to add to the set. We create a section with
1362 the same name as the symbol, and add a reloc to insert the
1363 appropriate value into the section.
1365 This action is actually obsolete; it used to make the
1366 linker do the right thing, but the linker no longer uses
1369 section
= bfd_get_section_by_name (abfd
, cache_ptr
->symbol
.name
);
1370 if (section
== NULL
)
1374 copy
= bfd_alloc (abfd
, strlen (cache_ptr
->symbol
.name
) + 1);
1377 bfd_set_error (bfd_error_no_memory
);
1381 strcpy (copy
, cache_ptr
->symbol
.name
);
1382 section
= bfd_make_section (abfd
, copy
);
1383 if (section
== NULL
)
1387 reloc
= (arelent_chain
*) bfd_alloc (abfd
, sizeof (arelent_chain
));
1390 bfd_set_error (bfd_error_no_memory
);
1394 /* Build a relocation entry for the constructor. */
1395 switch (cache_ptr
->type
& N_TYPE
)
1398 into_section
= bfd_abs_section_ptr
;
1399 cache_ptr
->type
= N_ABS
;
1402 into_section
= obj_textsec (abfd
);
1403 cache_ptr
->type
= N_TEXT
;
1406 into_section
= obj_datasec (abfd
);
1407 cache_ptr
->type
= N_DATA
;
1410 into_section
= obj_bsssec (abfd
);
1411 cache_ptr
->type
= N_BSS
;
1415 /* Build a relocation pointing into the constructor section
1416 pointing at the symbol in the set vector specified. */
1417 reloc
->relent
.addend
= cache_ptr
->symbol
.value
;
1418 cache_ptr
->symbol
.section
= into_section
;
1419 reloc
->relent
.sym_ptr_ptr
= into_section
->symbol_ptr_ptr
;
1421 /* We modify the symbol to belong to a section depending upon
1422 the name of the symbol, and add to the size of the section
1423 to contain a pointer to the symbol. Build a reloc entry to
1424 relocate to this symbol attached to this section. */
1425 section
->flags
= SEC_CONSTRUCTOR
| SEC_RELOC
;
1427 section
->reloc_count
++;
1428 section
->alignment_power
= 2;
1430 reloc
->next
= section
->constructor_chain
;
1431 section
->constructor_chain
= reloc
;
1432 reloc
->relent
.address
= section
->_raw_size
;
1433 section
->_raw_size
+= BYTES_IN_WORD
;
1435 reloc
->relent
.howto
= CTOR_TABLE_RELOC_HOWTO(abfd
);
1437 cache_ptr
->symbol
.flags
|= BSF_CONSTRUCTOR
;
1442 /* This symbol is the text of a warning message. The next
1443 symbol is the symbol to associate the warning with. If a
1444 reference is made to that symbol, a warning is issued. */
1445 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_WARNING
;
1447 /* @@ Stuffing pointers into integers is a no-no. We can
1448 usually get away with it if the integer is large enough
1450 if (sizeof (cache_ptr
+ 1) > sizeof (bfd_vma
))
1452 cache_ptr
->symbol
.value
= (bfd_vma
) (cache_ptr
+ 1);
1454 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1458 case N_INDR
: case N_INDR
| N_EXT
:
1459 /* An indirect symbol. This consists of two symbols in a row.
1460 The first symbol is the name of the indirection. The second
1461 symbol is the name of the target. A reference to the first
1462 symbol becomes a reference to the second. */
1463 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_INDIRECT
| visible
;
1465 /* @@ Stuffing pointers into integers is a no-no. We can
1466 usually get away with it if the integer is large enough
1468 if (sizeof (cache_ptr
+ 1) > sizeof (bfd_vma
))
1470 cache_ptr
->symbol
.value
= (bfd_vma
) (cache_ptr
+ 1);
1472 cache_ptr
->symbol
.section
= bfd_ind_section_ptr
;
1477 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1478 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1482 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1483 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1487 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1488 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1489 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1493 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1494 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1495 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1499 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1500 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1501 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1508 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1511 translate_to_native_sym_flags (abfd
, cache_ptr
, sym_pointer
)
1514 struct external_nlist
*sym_pointer
;
1516 bfd_vma value
= cache_ptr
->value
;
1518 /* Mask out any existing type bits in case copying from one section
1520 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1522 if (bfd_is_abs_section (bfd_get_section (cache_ptr
)))
1523 sym_pointer
->e_type
[0] |= N_ABS
;
1524 else if (bfd_get_section (cache_ptr
) == obj_textsec (abfd
)
1525 || (bfd_get_section (cache_ptr
)->output_section
1526 == obj_textsec (abfd
)))
1527 sym_pointer
->e_type
[0] |= N_TEXT
;
1528 else if (bfd_get_section (cache_ptr
) == obj_datasec (abfd
)
1529 || (bfd_get_section (cache_ptr
)->output_section
1530 == obj_datasec (abfd
)))
1531 sym_pointer
->e_type
[0] |= N_DATA
;
1532 else if (bfd_get_section (cache_ptr
) == obj_bsssec (abfd
)
1533 || (bfd_get_section (cache_ptr
)->output_section
1534 == obj_bsssec (abfd
)))
1535 sym_pointer
->e_type
[0] |= N_BSS
;
1536 else if (bfd_get_section (cache_ptr
) == NULL
)
1538 /* Protect the bfd_is_com_section call. This case occurs, e.g.,
1539 for the *DEBUG* section of a COFF file. */
1540 bfd_set_error (bfd_error_nonrepresentable_section
);
1543 else if (bfd_is_und_section (bfd_get_section (cache_ptr
)))
1544 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1545 else if (bfd_is_ind_section (bfd_get_section (cache_ptr
)))
1546 sym_pointer
->e_type
[0] = N_INDR
;
1547 else if (bfd_is_com_section (bfd_get_section (cache_ptr
)))
1548 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1551 bfd_set_error (bfd_error_nonrepresentable_section
);
1555 /* Turn the symbol from section relative to absolute again */
1556 value
+= cache_ptr
->section
->vma
;
1558 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1559 sym_pointer
->e_type
[0] = N_WARNING
;
1561 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1562 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1563 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1564 sym_pointer
->e_type
[0] |= N_EXT
;
1566 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1568 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1571 case N_ABS
: type
= N_SETA
; break;
1572 case N_TEXT
: type
= N_SETT
; break;
1573 case N_DATA
: type
= N_SETD
; break;
1574 case N_BSS
: type
= N_SETB
; break;
1576 sym_pointer
->e_type
[0] = type
;
1579 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1583 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1586 case N_ABS
: type
= N_WEAKA
; break;
1587 case N_TEXT
: type
= N_WEAKT
; break;
1588 case N_DATA
: type
= N_WEAKD
; break;
1589 case N_BSS
: type
= N_WEAKB
; break;
1590 case N_UNDF
: type
= N_WEAKU
; break;
1592 sym_pointer
->e_type
[0] = type
;
1595 PUT_WORD(abfd
, value
, sym_pointer
->e_value
);
1600 /* Native-level interface to symbols. */
1603 NAME(aout
,make_empty_symbol
) (abfd
)
1606 aout_symbol_type
*new =
1607 (aout_symbol_type
*)bfd_zalloc (abfd
, sizeof (aout_symbol_type
));
1610 bfd_set_error (bfd_error_no_memory
);
1613 new->symbol
.the_bfd
= abfd
;
1615 return &new->symbol
;
1618 /* Translate a set of internal symbols into external symbols. */
1621 NAME(aout
,translate_symbol_table
) (abfd
, in
, ext
, count
, str
, strsize
, dynamic
)
1623 aout_symbol_type
*in
;
1624 struct external_nlist
*ext
;
1625 bfd_size_type count
;
1627 bfd_size_type strsize
;
1630 struct external_nlist
*ext_end
;
1632 ext_end
= ext
+ count
;
1633 for (; ext
< ext_end
; ext
++, in
++)
1637 x
= GET_WORD (abfd
, ext
->e_strx
);
1638 in
->symbol
.the_bfd
= abfd
;
1640 /* For the normal symbols, the zero index points at the number
1641 of bytes in the string table but is to be interpreted as the
1642 null string. For the dynamic symbols, the number of bytes in
1643 the string table is stored in the __DYNAMIC structure and the
1644 zero index points at an actual string. */
1645 if (x
== 0 && ! dynamic
)
1646 in
->symbol
.name
= "";
1647 else if (x
< strsize
)
1648 in
->symbol
.name
= str
+ x
;
1652 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1653 in
->desc
= bfd_h_get_16 (abfd
, ext
->e_desc
);
1654 in
->other
= bfd_h_get_8 (abfd
, ext
->e_other
);
1655 in
->type
= bfd_h_get_8 (abfd
, ext
->e_type
);
1656 in
->symbol
.udata
= 0;
1658 if (! translate_from_native_sym_flags (abfd
, in
))
1662 in
->symbol
.flags
|= BSF_DYNAMIC
;
1668 /* We read the symbols into a buffer, which is discarded when this
1669 function exits. We read the strings into a buffer large enough to
1670 hold them all plus all the cached symbol entries. */
1673 NAME(aout
,slurp_symbol_table
) (abfd
)
1676 struct external_nlist
*old_external_syms
;
1677 aout_symbol_type
*cached
;
1680 /* If there's no work to be done, don't do any */
1681 if (obj_aout_symbols (abfd
) != (aout_symbol_type
*) NULL
)
1684 old_external_syms
= obj_aout_external_syms (abfd
);
1686 if (! aout_get_external_symbols (abfd
))
1689 if (obj_aout_external_sym_count (abfd
) == 0)
1691 bfd_set_error (bfd_error_no_symbols
);
1695 cached_size
= (obj_aout_external_sym_count (abfd
)
1696 * sizeof (aout_symbol_type
));
1697 cached
= (aout_symbol_type
*) malloc (cached_size
);
1700 bfd_set_error (bfd_error_no_memory
);
1703 memset (cached
, 0, cached_size
);
1705 /* Convert from external symbol information to internal. */
1706 if (! (NAME(aout
,translate_symbol_table
)
1708 obj_aout_external_syms (abfd
),
1709 obj_aout_external_sym_count (abfd
),
1710 obj_aout_external_strings (abfd
),
1711 obj_aout_external_string_size (abfd
),
1718 bfd_get_symcount (abfd
) = obj_aout_external_sym_count (abfd
);
1720 obj_aout_symbols (abfd
) = cached
;
1722 /* It is very likely that anybody who calls this function will not
1723 want the external symbol information, so if it was allocated
1724 because of our call to aout_get_external_symbols, we free it up
1725 right away to save space. */
1726 if (old_external_syms
== (struct external_nlist
*) NULL
1727 && obj_aout_external_syms (abfd
) != (struct external_nlist
*) NULL
)
1729 free (obj_aout_external_syms (abfd
));
1730 obj_aout_external_syms (abfd
) = NULL
;
1736 /* We use a hash table when writing out symbols so that we only write
1737 out a particular string once. This helps particularly when the
1738 linker writes out stabs debugging entries, because each different
1739 contributing object file tends to have many duplicate stabs
1742 Possible improvements:
1743 + look for strings matching trailing substrings of other strings
1744 + better data structures? balanced trees?
1745 + look at reducing memory use elsewhere -- maybe if we didn't have
1746 to construct the entire symbol table at once, we could get by
1747 with smaller amounts of VM? (What effect does that have on the
1748 string table reductions?)
1750 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1751 if BFD_TRADITIONAL_FORMAT is set. */
1753 /* An entry in the strtab hash table. */
1755 struct strtab_hash_entry
1757 struct bfd_hash_entry root
;
1758 /* Index in string table. */
1759 bfd_size_type index
;
1760 /* Next string in strtab. */
1761 struct strtab_hash_entry
*next
;
1764 /* The strtab hash table. */
1768 struct bfd_hash_table table
;
1769 /* Size of strtab--also next available index. */
1771 /* First string in strtab. */
1772 struct strtab_hash_entry
*first
;
1773 /* Last string in strtab. */
1774 struct strtab_hash_entry
*last
;
1777 static struct bfd_hash_entry
*strtab_hash_newfunc
1778 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
1779 static boolean stringtab_init
PARAMS ((struct strtab_hash
*));
1780 static bfd_size_type add_to_stringtab
1781 PARAMS ((bfd
*, struct strtab_hash
*, const char *, boolean
));
1782 static boolean emit_stringtab
PARAMS ((bfd
*, struct strtab_hash
*));
1784 /* Routine to create an entry in a strtab. */
1786 static struct bfd_hash_entry
*
1787 strtab_hash_newfunc (entry
, table
, string
)
1788 struct bfd_hash_entry
*entry
;
1789 struct bfd_hash_table
*table
;
1792 struct strtab_hash_entry
*ret
= (struct strtab_hash_entry
*) entry
;
1794 /* Allocate the structure if it has not already been allocated by a
1796 if (ret
== (struct strtab_hash_entry
*) NULL
)
1797 ret
= ((struct strtab_hash_entry
*)
1798 bfd_hash_allocate (table
, sizeof (struct strtab_hash_entry
)));
1799 if (ret
== (struct strtab_hash_entry
*) NULL
)
1801 bfd_set_error (bfd_error_no_memory
);
1805 /* Call the allocation method of the superclass. */
1806 ret
= ((struct strtab_hash_entry
*)
1807 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
1811 /* Initialize the local fields. */
1812 ret
->index
= (bfd_size_type
) -1;
1816 return (struct bfd_hash_entry
*) ret
;
1819 /* Look up an entry in an strtab. */
1821 #define strtab_hash_lookup(t, string, create, copy) \
1822 ((struct strtab_hash_entry *) \
1823 bfd_hash_lookup (&(t)->table, (string), (create), (copy)))
1825 /* Create a new strtab. */
1828 stringtab_init (table
)
1829 struct strtab_hash
*table
;
1831 if (! bfd_hash_table_init (&table
->table
, strtab_hash_newfunc
))
1834 /* Leave space for the size of the string table. */
1835 table
->size
= BYTES_IN_WORD
;
1837 table
->first
= NULL
;
1843 /* Free a strtab. */
1845 #define stringtab_free(tab) bfd_hash_table_free (&(tab)->table)
1847 /* Get the index of a string in a strtab, adding it if it is not
1848 already present. If HASH is false, we don't really use the hash
1849 table, and we don't eliminate duplicate strings. */
1851 static INLINE bfd_size_type
1852 add_to_stringtab (abfd
, tab
, str
, copy
)
1854 struct strtab_hash
*tab
;
1858 register struct strtab_hash_entry
*entry
;
1860 /* An index of 0 always means the empty string. */
1864 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) == 0)
1866 entry
= strtab_hash_lookup (tab
, str
, true, copy
);
1868 return (bfd_size_type
) -1;
1872 entry
= ((struct strtab_hash_entry
*)
1873 bfd_hash_allocate (&tab
->table
,
1874 sizeof (struct strtab_hash_entry
)));
1876 return (bfd_size_type
) -1;
1878 entry
->root
.string
= str
;
1883 n
= (char *) bfd_hash_allocate (&tab
->table
, strlen (str
) + 1);
1885 return (bfd_size_type
) -1;
1886 entry
->root
.string
= n
;
1888 entry
->index
= (bfd_size_type
) -1;
1892 if (entry
->index
== (bfd_size_type
) -1)
1894 entry
->index
= tab
->size
;
1895 tab
->size
+= strlen (str
) + 1;
1896 if (tab
->first
== NULL
)
1899 tab
->last
->next
= entry
;
1903 return entry
->index
;
1906 /* Write out a strtab. ABFD is already at the right location in the
1910 emit_stringtab (abfd
, tab
)
1912 struct strtab_hash
*tab
;
1914 bfd_byte buffer
[BYTES_IN_WORD
];
1915 register struct strtab_hash_entry
*entry
;
1917 PUT_WORD (abfd
, tab
->size
, buffer
);
1918 if (bfd_write ((PTR
) buffer
, 1, BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
1921 for (entry
= tab
->first
; entry
!= NULL
; entry
= entry
->next
)
1923 register const char *str
;
1924 register size_t len
;
1926 str
= entry
->root
.string
;
1927 len
= strlen (str
) + 1;
1928 if (bfd_write ((PTR
) str
, 1, len
, abfd
) != len
)
1936 NAME(aout
,write_syms
) (abfd
)
1939 unsigned int count
;
1940 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1941 struct strtab_hash strtab
;
1943 if (! stringtab_init (&strtab
))
1946 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1948 asymbol
*g
= generic
[count
];
1950 struct external_nlist nsp
;
1952 indx
= add_to_stringtab (abfd
, &strtab
, g
->name
, false);
1953 if (indx
== (bfd_size_type
) -1)
1955 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1957 if (bfd_asymbol_flavour(g
) == abfd
->xvec
->flavour
)
1959 bfd_h_put_16(abfd
, aout_symbol(g
)->desc
, nsp
.e_desc
);
1960 bfd_h_put_8(abfd
, aout_symbol(g
)->other
, nsp
.e_other
);
1961 bfd_h_put_8(abfd
, aout_symbol(g
)->type
, nsp
.e_type
);
1965 bfd_h_put_16(abfd
,0, nsp
.e_desc
);
1966 bfd_h_put_8(abfd
, 0, nsp
.e_other
);
1967 bfd_h_put_8(abfd
, 0, nsp
.e_type
);
1970 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1973 if (bfd_write((PTR
)&nsp
,1,EXTERNAL_NLIST_SIZE
, abfd
)
1974 != EXTERNAL_NLIST_SIZE
)
1977 /* NB: `KEEPIT' currently overlays `flags', so set this only
1978 here, at the end. */
1982 if (! emit_stringtab (abfd
, &strtab
))
1985 stringtab_free (&strtab
);
1990 stringtab_free (&strtab
);
1996 NAME(aout
,get_symtab
) (abfd
, location
)
2000 unsigned int counter
= 0;
2001 aout_symbol_type
*symbase
;
2003 if (!NAME(aout
,slurp_symbol_table
)(abfd
))
2006 for (symbase
= obj_aout_symbols(abfd
); counter
++ < bfd_get_symcount (abfd
);)
2007 *(location
++) = (asymbol
*)( symbase
++);
2009 return bfd_get_symcount (abfd
);
2013 /* Standard reloc stuff */
2014 /* Output standard relocation information to a file in target byte order. */
2017 NAME(aout
,swap_std_reloc_out
) (abfd
, g
, natptr
)
2020 struct reloc_std_external
*natptr
;
2023 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2025 unsigned int r_length
;
2027 int r_baserel
, r_jmptable
, r_relative
;
2028 asection
*output_section
= sym
->section
->output_section
;
2030 PUT_WORD(abfd
, g
->address
, natptr
->r_address
);
2032 r_length
= g
->howto
->size
; /* Size as a power of two */
2033 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
2034 /* XXX This relies on relocs coming from a.out files. */
2035 r_baserel
= (g
->howto
->type
& 8) != 0;
2036 r_jmptable
= (g
->howto
->type
& 16) != 0;
2037 r_relative
= (g
->howto
->type
& 32) != 0;
2040 /* For a standard reloc, the addend is in the object file. */
2041 r_addend
= g
->addend
+ (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2044 /* name was clobbered by aout_write_syms to be symbol index */
2046 /* If this relocation is relative to a symbol then set the
2047 r_index to the symbols index, and the r_extern bit.
2049 Absolute symbols can come in in two ways, either as an offset
2050 from the abs section, or as a symbol which has an abs value.
2055 if (bfd_is_com_section (output_section
)
2056 || bfd_is_abs_section (output_section
)
2057 || bfd_is_und_section (output_section
))
2059 if (bfd_abs_section_ptr
->symbol
== sym
)
2061 /* Whoops, looked like an abs symbol, but is really an offset
2062 from the abs section */
2068 /* Fill in symbol */
2070 r_index
= stoi((*(g
->sym_ptr_ptr
))->KEEPIT
);
2076 /* Just an ordinary section */
2078 r_index
= output_section
->target_index
;
2081 /* now the fun stuff */
2082 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2083 natptr
->r_index
[0] = r_index
>> 16;
2084 natptr
->r_index
[1] = r_index
>> 8;
2085 natptr
->r_index
[2] = r_index
;
2087 (r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2088 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2089 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2090 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2091 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2092 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
);
2094 natptr
->r_index
[2] = r_index
>> 16;
2095 natptr
->r_index
[1] = r_index
>> 8;
2096 natptr
->r_index
[0] = r_index
;
2098 (r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2099 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2100 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2101 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2102 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2103 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2108 /* Extended stuff */
2109 /* Output extended relocation information to a file in target byte order. */
2112 NAME(aout
,swap_ext_reloc_out
) (abfd
, g
, natptr
)
2115 register struct reloc_ext_external
*natptr
;
2119 unsigned int r_type
;
2120 unsigned int r_addend
;
2121 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2122 asection
*output_section
= sym
->section
->output_section
;
2124 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2126 r_type
= (unsigned int) g
->howto
->type
;
2128 r_addend
= g
->addend
+ (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2130 /* If this relocation is relative to a symbol then set the
2131 r_index to the symbols index, and the r_extern bit.
2133 Absolute symbols can come in in two ways, either as an offset
2134 from the abs section, or as a symbol which has an abs value.
2135 check for that here. */
2137 if (bfd_is_com_section (output_section
)
2138 || bfd_is_abs_section (output_section
)
2139 || bfd_is_und_section (output_section
))
2141 if (bfd_abs_section_ptr
->symbol
== sym
)
2143 /* Whoops, looked like an abs symbol, but is really an offset
2144 from the abs section */
2151 r_index
= stoi((*(g
->sym_ptr_ptr
))->KEEPIT
);
2156 /* Just an ordinary section */
2158 r_index
= output_section
->target_index
;
2161 /* now the fun stuff */
2162 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2163 natptr
->r_index
[0] = r_index
>> 16;
2164 natptr
->r_index
[1] = r_index
>> 8;
2165 natptr
->r_index
[2] = r_index
;
2167 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2168 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2170 natptr
->r_index
[2] = r_index
>> 16;
2171 natptr
->r_index
[1] = r_index
>> 8;
2172 natptr
->r_index
[0] = r_index
;
2174 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2175 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2178 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2181 /* BFD deals internally with all things based from the section they're
2182 in. so, something in 10 bytes into a text section with a base of
2183 50 would have a symbol (.text+10) and know .text vma was 50.
2185 Aout keeps all it's symbols based from zero, so the symbol would
2186 contain 60. This macro subs the base of each section from the value
2187 to give the true offset from the section */
2190 #define MOVE_ADDRESS(ad) \
2192 /* undefined symbol */ \
2193 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2194 cache_ptr->addend = ad; \
2196 /* defined, section relative. replace symbol with pointer to \
2197 symbol which points to section */ \
2198 switch (r_index) { \
2200 case N_TEXT | N_EXT: \
2201 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2202 cache_ptr->addend = ad - su->textsec->vma; \
2205 case N_DATA | N_EXT: \
2206 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2207 cache_ptr->addend = ad - su->datasec->vma; \
2210 case N_BSS | N_EXT: \
2211 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2212 cache_ptr->addend = ad - su->bsssec->vma; \
2216 case N_ABS | N_EXT: \
2217 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2218 cache_ptr->addend = ad; \
2224 NAME(aout
,swap_ext_reloc_in
) (abfd
, bytes
, cache_ptr
, symbols
)
2226 struct reloc_ext_external
*bytes
;
2232 unsigned int r_type
;
2233 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2235 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2237 /* now the fun stuff */
2238 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2239 r_index
= (bytes
->r_index
[0] << 16)
2240 | (bytes
->r_index
[1] << 8)
2241 | bytes
->r_index
[2];
2242 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2243 r_type
= (bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2244 >> RELOC_EXT_BITS_TYPE_SH_BIG
;
2246 r_index
= (bytes
->r_index
[2] << 16)
2247 | (bytes
->r_index
[1] << 8)
2248 | bytes
->r_index
[0];
2249 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2250 r_type
= (bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2251 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
;
2254 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2255 MOVE_ADDRESS(GET_SWORD(abfd
, bytes
->r_addend
));
2259 NAME(aout
,swap_std_reloc_in
) (abfd
, bytes
, cache_ptr
, symbols
)
2261 struct reloc_std_external
*bytes
;
2267 unsigned int r_length
;
2269 int r_baserel
, r_jmptable
, r_relative
;
2270 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2273 cache_ptr
->address
= bfd_h_get_32 (abfd
, bytes
->r_address
);
2275 /* now the fun stuff */
2276 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2277 r_index
= (bytes
->r_index
[0] << 16)
2278 | (bytes
->r_index
[1] << 8)
2279 | bytes
->r_index
[2];
2280 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2281 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2282 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2283 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2284 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2285 r_length
= (bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2286 >> RELOC_STD_BITS_LENGTH_SH_BIG
;
2288 r_index
= (bytes
->r_index
[2] << 16)
2289 | (bytes
->r_index
[1] << 8)
2290 | bytes
->r_index
[0];
2291 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2292 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2293 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2294 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2295 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2296 r_length
= (bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2297 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
;
2300 howto_idx
= r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2301 + 16 * r_jmptable
+ 32 * r_relative
;
2302 BFD_ASSERT (howto_idx
< TABLE_SIZE (howto_table_std
));
2303 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2304 BFD_ASSERT (cache_ptr
->howto
->type
!= -1);
2309 /* Read and swap the relocs for a section. */
2312 NAME(aout
,slurp_reloc_table
) (abfd
, asect
, symbols
)
2318 bfd_size_type reloc_size
;
2320 arelent
*reloc_cache
;
2322 unsigned int counter
= 0;
2325 if (asect
->relocation
)
2328 if (asect
->flags
& SEC_CONSTRUCTOR
)
2331 if (asect
== obj_datasec (abfd
))
2332 reloc_size
= exec_hdr(abfd
)->a_drsize
;
2333 else if (asect
== obj_textsec (abfd
))
2334 reloc_size
= exec_hdr(abfd
)->a_trsize
;
2335 else if (asect
== obj_bsssec (abfd
))
2339 bfd_set_error (bfd_error_invalid_operation
);
2343 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2346 each_size
= obj_reloc_entry_size (abfd
);
2348 count
= reloc_size
/ each_size
;
2350 reloc_cache
= (arelent
*) malloc ((size_t) (count
* sizeof (arelent
)));
2351 if (reloc_cache
== NULL
&& count
!= 0)
2353 bfd_set_error (bfd_error_no_memory
);
2356 memset (reloc_cache
, 0, count
* sizeof (arelent
));
2358 relocs
= malloc (reloc_size
);
2359 if (relocs
== NULL
&& reloc_size
!= 0)
2362 bfd_set_error (bfd_error_no_memory
);
2366 if (bfd_read (relocs
, 1, reloc_size
, abfd
) != reloc_size
)
2373 cache_ptr
= reloc_cache
;
2374 if (each_size
== RELOC_EXT_SIZE
)
2376 register struct reloc_ext_external
*rptr
=
2377 (struct reloc_ext_external
*) relocs
;
2379 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2380 NAME(aout
,swap_ext_reloc_in
) (abfd
, rptr
, cache_ptr
, symbols
);
2384 register struct reloc_std_external
*rptr
=
2385 (struct reloc_std_external
*) relocs
;
2387 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2388 MY_swap_std_reloc_in(abfd
, rptr
, cache_ptr
, symbols
);
2393 asect
->relocation
= reloc_cache
;
2394 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2399 /* Write out a relocation section into an object file. */
2402 NAME(aout
,squirt_out_relocs
) (abfd
, section
)
2407 unsigned char *native
, *natptr
;
2410 unsigned int count
= section
->reloc_count
;
2413 if (count
== 0) return true;
2415 each_size
= obj_reloc_entry_size (abfd
);
2416 natsize
= each_size
* count
;
2417 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2419 bfd_set_error (bfd_error_no_memory
);
2423 generic
= section
->orelocation
;
2425 if (each_size
== RELOC_EXT_SIZE
)
2427 for (natptr
= native
;
2429 --count
, natptr
+= each_size
, ++generic
)
2430 NAME(aout
,swap_ext_reloc_out
) (abfd
, *generic
, (struct reloc_ext_external
*)natptr
);
2434 for (natptr
= native
;
2436 --count
, natptr
+= each_size
, ++generic
)
2437 MY_swap_std_reloc_out(abfd
, *generic
, (struct reloc_std_external
*)natptr
);
2440 if ( bfd_write ((PTR
) native
, 1, natsize
, abfd
) != natsize
) {
2441 bfd_release(abfd
, native
);
2444 bfd_release (abfd
, native
);
2449 /* This is stupid. This function should be a boolean predicate */
2451 NAME(aout
,canonicalize_reloc
) (abfd
, section
, relptr
, symbols
)
2457 arelent
*tblptr
= section
->relocation
;
2460 if (section
== obj_bsssec (abfd
))
2466 if (!(tblptr
|| NAME(aout
,slurp_reloc_table
)(abfd
, section
, symbols
)))
2469 if (section
->flags
& SEC_CONSTRUCTOR
) {
2470 arelent_chain
*chain
= section
->constructor_chain
;
2471 for (count
= 0; count
< section
->reloc_count
; count
++) {
2472 *relptr
++ = &chain
->relent
;
2473 chain
= chain
->next
;
2477 tblptr
= section
->relocation
;
2479 for (count
= 0; count
++ < section
->reloc_count
;)
2481 *relptr
++ = tblptr
++;
2486 return section
->reloc_count
;
2490 NAME(aout
,get_reloc_upper_bound
) (abfd
, asect
)
2494 if (bfd_get_format (abfd
) != bfd_object
) {
2495 bfd_set_error (bfd_error_invalid_operation
);
2498 if (asect
->flags
& SEC_CONSTRUCTOR
) {
2499 return (sizeof (arelent
*) * (asect
->reloc_count
+1));
2502 if (asect
== obj_datasec (abfd
))
2503 return (sizeof (arelent
*)
2504 * ((exec_hdr(abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
))
2507 if (asect
== obj_textsec (abfd
))
2508 return (sizeof (arelent
*)
2509 * ((exec_hdr(abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
))
2512 if (asect
== obj_bsssec (abfd
))
2513 return sizeof (arelent
*);
2515 if (asect
== obj_bsssec (abfd
))
2518 bfd_set_error (bfd_error_invalid_operation
);
2524 NAME(aout
,get_symtab_upper_bound
) (abfd
)
2527 if (!NAME(aout
,slurp_symbol_table
)(abfd
))
2530 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2535 NAME(aout
,get_lineno
) (ignore_abfd
, ignore_symbol
)
2537 asymbol
*ignore_symbol
;
2539 return (alent
*)NULL
;
2544 NAME(aout
,get_symbol_info
) (ignore_abfd
, symbol
, ret
)
2549 bfd_symbol_info (symbol
, ret
);
2551 if (ret
->type
== '?')
2553 int type_code
= aout_symbol(symbol
)->type
& 0xff;
2554 CONST
char *stab_name
= aout_stab_name(type_code
);
2555 static char buf
[10];
2557 if (stab_name
== NULL
)
2559 sprintf(buf
, "(%d)", type_code
);
2563 ret
->stab_other
= (unsigned)(aout_symbol(symbol
)->other
& 0xff);
2564 ret
->stab_desc
= (unsigned)(aout_symbol(symbol
)->desc
& 0xffff);
2565 ret
->stab_name
= stab_name
;
2571 NAME(aout
,print_symbol
) (ignore_abfd
, afile
, symbol
, how
)
2575 bfd_print_symbol_type how
;
2577 FILE *file
= (FILE *)afile
;
2580 case bfd_print_symbol_name
:
2582 fprintf(file
,"%s", symbol
->name
);
2584 case bfd_print_symbol_more
:
2585 fprintf(file
,"%4x %2x %2x",(unsigned)(aout_symbol(symbol
)->desc
& 0xffff),
2586 (unsigned)(aout_symbol(symbol
)->other
& 0xff),
2587 (unsigned)(aout_symbol(symbol
)->type
));
2589 case bfd_print_symbol_all
:
2591 CONST
char *section_name
= symbol
->section
->name
;
2594 bfd_print_symbol_vandf((PTR
)file
,symbol
);
2596 fprintf(file
," %-5s %04x %02x %02x",
2598 (unsigned)(aout_symbol(symbol
)->desc
& 0xffff),
2599 (unsigned)(aout_symbol(symbol
)->other
& 0xff),
2600 (unsigned)(aout_symbol(symbol
)->type
& 0xff));
2602 fprintf(file
," %s", symbol
->name
);
2609 provided a BFD, a section and an offset into the section, calculate
2610 and return the name of the source file and the line nearest to the
2615 NAME(aout
,find_nearest_line
)
2616 (abfd
, section
, symbols
, offset
, filename_ptr
, functionname_ptr
, line_ptr
)
2621 CONST
char **filename_ptr
;
2622 CONST
char **functionname_ptr
;
2623 unsigned int *line_ptr
;
2625 /* Run down the file looking for the filename, function and linenumber */
2627 static char buffer
[100];
2628 static char filename_buffer
[200];
2629 CONST
char *directory_name
= NULL
;
2630 CONST
char *main_file_name
= NULL
;
2631 CONST
char *current_file_name
= NULL
;
2632 CONST
char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2633 bfd_vma high_line_vma
= ~0;
2634 bfd_vma low_func_vma
= 0;
2636 *filename_ptr
= abfd
->filename
;
2637 *functionname_ptr
= 0;
2639 if (symbols
!= (asymbol
**)NULL
) {
2640 for (p
= symbols
; *p
; p
++) {
2641 aout_symbol_type
*q
= (aout_symbol_type
*)(*p
);
2645 main_file_name
= current_file_name
= q
->symbol
.name
;
2646 /* Look ahead to next symbol to check if that too is an N_SO. */
2650 q
= (aout_symbol_type
*)(*p
);
2651 if (q
->type
!= (int)N_SO
)
2654 /* Found a second N_SO First is directory; second is filename. */
2655 directory_name
= current_file_name
;
2656 main_file_name
= current_file_name
= q
->symbol
.name
;
2657 if (obj_textsec(abfd
) != section
)
2661 current_file_name
= q
->symbol
.name
;
2668 /* We'll keep this if it resolves nearer than the one we have already */
2669 if (q
->symbol
.value
>= offset
&&
2670 q
->symbol
.value
< high_line_vma
) {
2671 *line_ptr
= q
->desc
;
2672 high_line_vma
= q
->symbol
.value
;
2673 line_file_name
= current_file_name
;
2678 /* We'll keep this if it is nearer than the one we have already */
2679 if (q
->symbol
.value
>= low_func_vma
&&
2680 q
->symbol
.value
<= offset
) {
2681 low_func_vma
= q
->symbol
.value
;
2682 func
= (asymbol
*)q
;
2684 if (*line_ptr
&& func
) {
2685 CONST
char *function
= func
->name
;
2688 /* The caller expects a symbol name. We actually have a
2689 function name, without the leading underscore. Put the
2690 underscore back in, so that the caller gets a symbol
2692 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2693 strncpy (buffer
, function
, sizeof (buffer
) - 1);
2696 buffer
[0] = bfd_get_symbol_leading_char (abfd
);
2697 strncpy (buffer
+ 1, function
, sizeof (buffer
) - 2);
2699 buffer
[sizeof(buffer
)-1] = 0;
2700 /* Have to remove : stuff */
2701 p
= strchr(buffer
,':');
2702 if (p
!= NULL
) { *p
= '\0'; }
2703 *functionname_ptr
= buffer
;
2715 main_file_name
= line_file_name
;
2716 if (main_file_name
) {
2717 if (main_file_name
[0] == '/' || directory_name
== NULL
)
2718 *filename_ptr
= main_file_name
;
2720 sprintf(filename_buffer
, "%.140s%.50s",
2721 directory_name
, main_file_name
);
2722 *filename_ptr
= filename_buffer
;
2731 NAME(aout
,sizeof_headers
) (abfd
, execable
)
2735 return adata(abfd
).exec_bytes_size
;
2738 /* Free all information we have cached for this BFD. We can always
2739 read it again later if we need it. */
2742 NAME(aout
,bfd_free_cached_info
) (abfd
)
2747 if (bfd_get_format (abfd
) != bfd_object
)
2750 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2751 BFCI_FREE (obj_aout_symbols (abfd
));
2752 BFCI_FREE (obj_aout_external_syms (abfd
));
2753 BFCI_FREE (obj_aout_external_strings (abfd
));
2754 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
2755 BFCI_FREE (o
->relocation
);
2761 /* a.out link code. */
2763 static boolean aout_link_add_object_symbols
2764 PARAMS ((bfd
*, struct bfd_link_info
*));
2765 static boolean aout_link_check_archive_element
2766 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*));
2767 static boolean aout_link_free_symbols
PARAMS ((bfd
*));
2768 static boolean aout_link_check_ar_symbols
2769 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*pneeded
));
2770 static boolean aout_link_add_symbols
2771 PARAMS ((bfd
*, struct bfd_link_info
*));
2773 /* Routine to create an entry in an a.out link hash table. */
2775 struct bfd_hash_entry
*
2776 NAME(aout
,link_hash_newfunc
) (entry
, table
, string
)
2777 struct bfd_hash_entry
*entry
;
2778 struct bfd_hash_table
*table
;
2781 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2783 /* Allocate the structure if it has not already been allocated by a
2785 if (ret
== (struct aout_link_hash_entry
*) NULL
)
2786 ret
= ((struct aout_link_hash_entry
*)
2787 bfd_hash_allocate (table
, sizeof (struct aout_link_hash_entry
)));
2788 if (ret
== (struct aout_link_hash_entry
*) NULL
)
2790 bfd_set_error (bfd_error_no_memory
);
2791 return (struct bfd_hash_entry
*) ret
;
2794 /* Call the allocation method of the superclass. */
2795 ret
= ((struct aout_link_hash_entry
*)
2796 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2800 /* Set local fields. */
2801 ret
->written
= false;
2805 return (struct bfd_hash_entry
*) ret
;
2808 /* Initialize an a.out link hash table. */
2811 NAME(aout
,link_hash_table_init
) (table
, abfd
, newfunc
)
2812 struct aout_link_hash_table
*table
;
2814 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
2815 struct bfd_hash_table
*,
2818 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
2821 /* Create an a.out link hash table. */
2823 struct bfd_link_hash_table
*
2824 NAME(aout
,link_hash_table_create
) (abfd
)
2827 struct aout_link_hash_table
*ret
;
2829 ret
= ((struct aout_link_hash_table
*)
2830 malloc (sizeof (struct aout_link_hash_table
)));
2831 if (ret
== (struct aout_link_hash_table
*) NULL
)
2833 bfd_set_error (bfd_error_no_memory
);
2834 return (struct bfd_link_hash_table
*) NULL
;
2836 if (! NAME(aout
,link_hash_table_init
) (ret
, abfd
,
2837 NAME(aout
,link_hash_newfunc
)))
2840 return (struct bfd_link_hash_table
*) NULL
;
2845 /* Given an a.out BFD, add symbols to the global hash table as
2849 NAME(aout
,link_add_symbols
) (abfd
, info
)
2851 struct bfd_link_info
*info
;
2853 switch (bfd_get_format (abfd
))
2856 return aout_link_add_object_symbols (abfd
, info
);
2858 return _bfd_generic_link_add_archive_symbols
2859 (abfd
, info
, aout_link_check_archive_element
);
2861 bfd_set_error (bfd_error_wrong_format
);
2866 /* Add symbols from an a.out object file. */
2869 aout_link_add_object_symbols (abfd
, info
)
2871 struct bfd_link_info
*info
;
2873 if (! aout_get_external_symbols (abfd
))
2875 if (! aout_link_add_symbols (abfd
, info
))
2877 if (! info
->keep_memory
)
2879 if (! aout_link_free_symbols (abfd
))
2885 /* Check a single archive element to see if we need to include it in
2886 the link. *PNEEDED is set according to whether this element is
2887 needed in the link or not. This is called from
2888 _bfd_generic_link_add_archive_symbols. */
2891 aout_link_check_archive_element (abfd
, info
, pneeded
)
2893 struct bfd_link_info
*info
;
2896 if (! aout_get_external_symbols (abfd
))
2899 if (! aout_link_check_ar_symbols (abfd
, info
, pneeded
))
2904 if (! aout_link_add_symbols (abfd
, info
))
2908 /* We keep around the symbols even if we aren't going to use this
2909 object file, because we may want to reread it. This doesn't
2910 waste too much memory, because it isn't all that common to read
2911 an archive element but not need it. */
2912 if (! info
->keep_memory
)
2914 if (! aout_link_free_symbols (abfd
))
2921 /* Free up the internal symbols read from an a.out file. */
2924 aout_link_free_symbols (abfd
)
2927 if (obj_aout_external_syms (abfd
) != (struct external_nlist
*) NULL
)
2929 free ((PTR
) obj_aout_external_syms (abfd
));
2930 obj_aout_external_syms (abfd
) = (struct external_nlist
*) NULL
;
2932 if (obj_aout_external_strings (abfd
) != (char *) NULL
)
2934 free ((PTR
) obj_aout_external_strings (abfd
));
2935 obj_aout_external_strings (abfd
) = (char *) NULL
;
2940 /* Look through the internal symbols to see if this object file should
2941 be included in the link. We should include this object file if it
2942 defines any symbols which are currently undefined. If this object
2943 file defines a common symbol, then we may adjust the size of the
2944 known symbol but we do not include the object file in the link
2945 (unless there is some other reason to include it). */
2948 aout_link_check_ar_symbols (abfd
, info
, pneeded
)
2950 struct bfd_link_info
*info
;
2953 register struct external_nlist
*p
;
2954 struct external_nlist
*pend
;
2959 /* Look through all the symbols. */
2960 p
= obj_aout_external_syms (abfd
);
2961 pend
= p
+ obj_aout_external_sym_count (abfd
);
2962 strings
= obj_aout_external_strings (abfd
);
2963 for (; p
< pend
; p
++)
2965 int type
= bfd_h_get_8 (abfd
, p
->e_type
);
2967 struct bfd_link_hash_entry
*h
;
2969 /* Ignore symbols that are not externally visible. This is an
2970 optimization only, as we check the type more thoroughly
2972 if (((type
& N_EXT
) == 0
2973 || (type
& N_STAB
) != 0
2980 if (type
== N_WARNING
2986 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
2987 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
2989 /* We are only interested in symbols that are currently
2990 undefined or common. */
2991 if (h
== (struct bfd_link_hash_entry
*) NULL
2992 || (h
->type
!= bfd_link_hash_undefined
2993 && h
->type
!= bfd_link_hash_common
))
2995 if (type
== (N_INDR
| N_EXT
))
3000 if (type
== (N_TEXT
| N_EXT
)
3001 || type
== (N_DATA
| N_EXT
)
3002 || type
== (N_BSS
| N_EXT
)
3003 || type
== (N_ABS
| N_EXT
)
3004 || type
== (N_INDR
| N_EXT
))
3006 /* This object file defines this symbol. We must link it
3007 in. This is true regardless of whether the current
3008 definition of the symbol is undefined or common. If the
3009 current definition is common, we have a case in which we
3010 have already seen an object file including
3012 and this object file from the archive includes
3014 In such a case we must include this object file.
3016 FIXME: The SunOS 4.1.3 linker will pull in the archive
3017 element if the symbol is defined in the .data section,
3018 but not if it is defined in the .text section. That
3019 seems a bit crazy to me, and I haven't implemented it.
3020 However, it might be correct. */
3021 if (! (*info
->callbacks
->add_archive_element
) (info
, abfd
, name
))
3027 if (type
== (N_UNDF
| N_EXT
))
3031 value
= GET_WORD (abfd
, p
->e_value
);
3034 /* This symbol is common in the object from the archive
3036 if (h
->type
== bfd_link_hash_undefined
)
3041 symbfd
= h
->u
.undef
.abfd
;
3042 if (symbfd
== (bfd
*) NULL
)
3044 /* This symbol was created as undefined from
3045 outside BFD. We assume that we should link
3046 in the object file. This is done for the -u
3047 option in the linker. */
3048 if (! (*info
->callbacks
->add_archive_element
) (info
,
3055 /* Turn the current link symbol into a common
3056 symbol. It is already on the undefs list. */
3057 h
->type
= bfd_link_hash_common
;
3058 h
->u
.c
.size
= value
;
3059 if (h
->u
.c
.size
!= value
)
3061 /* The size did not fit in the bitfield. */
3062 bfd_set_error (bfd_error_bad_value
);
3066 /* FIXME: This isn't quite right. The maximum
3067 alignment of a common symbol should be set by the
3068 architecture of the output file, not of the input
3070 power
= bfd_log2 (value
);
3071 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3072 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3073 h
->u
.c
.alignment_power
= power
;
3075 h
->u
.c
.section
= bfd_make_section_old_way (symbfd
,
3080 /* Adjust the size of the common symbol if
3082 if (value
> h
->u
.c
.size
)
3083 h
->u
.c
.size
= value
;
3093 /* This symbol is weak but defined. We must pull it in if
3094 the current link symbol is undefined, but we don't want
3095 it if the current link symbol is common. */
3096 if (h
->type
== bfd_link_hash_undefined
)
3098 if (! (*info
->callbacks
->add_archive_element
) (info
, abfd
, name
))
3106 /* We do not need this object file. */
3110 /* Add all symbols from an object file to the hash table. */
3113 aout_link_add_symbols (abfd
, info
)
3115 struct bfd_link_info
*info
;
3117 boolean (*add_one_symbol
) PARAMS ((struct bfd_link_info
*, bfd
*,
3118 const char *, flagword
, asection
*,
3119 bfd_vma
, const char *, boolean
,
3121 struct bfd_link_hash_entry
**));
3122 bfd_size_type sym_count
;
3125 struct aout_link_hash_entry
**sym_hash
;
3126 register struct external_nlist
*p
;
3127 struct external_nlist
*pend
;
3129 sym_count
= obj_aout_external_sym_count (abfd
);
3130 strings
= obj_aout_external_strings (abfd
);
3131 if (info
->keep_memory
)
3136 /* We keep a list of the linker hash table entries that correspond
3137 to particular symbols. We could just look them up in the hash
3138 table, but keeping the list is more efficient. Perhaps this
3139 should be conditional on info->keep_memory. */
3140 sym_hash
= ((struct aout_link_hash_entry
**)
3143 * sizeof (struct aout_link_hash_entry
*))));
3144 if (sym_hash
== NULL
&& sym_count
!= 0)
3146 bfd_set_error (bfd_error_no_memory
);
3149 obj_aout_sym_hashes (abfd
) = sym_hash
;
3151 if ((abfd
->flags
& DYNAMIC
) != 0
3152 && aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
3154 if (! (*aout_backend_info (abfd
)->add_dynamic_symbols
) (abfd
, info
))
3158 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
3159 if (add_one_symbol
== NULL
)
3160 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
3162 p
= obj_aout_external_syms (abfd
);
3163 pend
= p
+ sym_count
;
3164 for (; p
< pend
; p
++, sym_hash
++)
3175 type
= bfd_h_get_8 (abfd
, p
->e_type
);
3177 /* Ignore debugging symbols. */
3178 if ((type
& N_STAB
) != 0)
3181 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3182 value
= GET_WORD (abfd
, p
->e_value
);
3199 /* Ignore symbols that are not externally visible. */
3202 /* Ignore local indirect symbol. */
3207 case N_UNDF
| N_EXT
:
3210 section
= bfd_und_section_ptr
;
3214 section
= bfd_com_section_ptr
;
3217 section
= bfd_abs_section_ptr
;
3219 case N_TEXT
| N_EXT
:
3220 section
= obj_textsec (abfd
);
3221 value
-= bfd_get_section_vma (abfd
, section
);
3223 case N_DATA
| N_EXT
:
3224 case N_SETV
| N_EXT
:
3225 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3226 translate_from_native_sym_flags. */
3227 section
= obj_datasec (abfd
);
3228 value
-= bfd_get_section_vma (abfd
, section
);
3231 section
= obj_bsssec (abfd
);
3232 value
-= bfd_get_section_vma (abfd
, section
);
3234 case N_INDR
| N_EXT
:
3235 /* An indirect symbol. The next symbol is the symbol
3236 which this one really is. */
3237 BFD_ASSERT (p
+ 1 < pend
);
3239 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3240 section
= bfd_ind_section_ptr
;
3241 flags
|= BSF_INDIRECT
;
3243 case N_COMM
| N_EXT
:
3244 section
= bfd_com_section_ptr
;
3246 case N_SETA
: case N_SETA
| N_EXT
:
3247 section
= bfd_abs_section_ptr
;
3248 flags
|= BSF_CONSTRUCTOR
;
3250 case N_SETT
: case N_SETT
| N_EXT
:
3251 section
= obj_textsec (abfd
);
3252 flags
|= BSF_CONSTRUCTOR
;
3253 value
-= bfd_get_section_vma (abfd
, section
);
3255 case N_SETD
: case N_SETD
| N_EXT
:
3256 section
= obj_datasec (abfd
);
3257 flags
|= BSF_CONSTRUCTOR
;
3258 value
-= bfd_get_section_vma (abfd
, section
);
3260 case N_SETB
: case N_SETB
| N_EXT
:
3261 section
= obj_bsssec (abfd
);
3262 flags
|= BSF_CONSTRUCTOR
;
3263 value
-= bfd_get_section_vma (abfd
, section
);
3266 /* A warning symbol. The next symbol is the one to warn
3268 BFD_ASSERT (p
+ 1 < pend
);
3271 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3272 section
= bfd_und_section_ptr
;
3273 flags
|= BSF_WARNING
;
3276 section
= bfd_und_section_ptr
;
3280 section
= bfd_abs_section_ptr
;
3284 section
= obj_textsec (abfd
);
3285 value
-= bfd_get_section_vma (abfd
, section
);
3289 section
= obj_datasec (abfd
);
3290 value
-= bfd_get_section_vma (abfd
, section
);
3294 section
= obj_bsssec (abfd
);
3295 value
-= bfd_get_section_vma (abfd
, section
);
3300 if (! ((*add_one_symbol
)
3301 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, false,
3302 (struct bfd_link_hash_entry
**) sym_hash
)))
3305 /* Restrict the maximum alignment of a common symbol based on
3306 the architecture, since a.out has no way to represent
3307 alignment requirements of a section in a .o file. FIXME:
3308 This isn't quite right: it should use the architecture of the
3309 output file, not the input files. */
3310 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3311 && ((*sym_hash
)->root
.u
.c
.alignment_power
>
3312 bfd_get_arch_info (abfd
)->section_align_power
))
3313 (*sym_hash
)->root
.u
.c
.alignment_power
=
3314 bfd_get_arch_info (abfd
)->section_align_power
;
3316 /* If this is a set symbol, and we are not building sets, then
3317 it is possible for the hash entry to not have been set. In
3318 such a case, treat the symbol as not globally defined. */
3319 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3321 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3325 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3332 /* During the final link step we need to pass around a bunch of
3333 information, so we do it in an instance of this structure. */
3335 struct aout_final_link_info
3337 /* General link information. */
3338 struct bfd_link_info
*info
;
3341 /* Reloc file positions. */
3342 file_ptr treloff
, dreloff
;
3343 /* File position of symbols. */
3346 struct strtab_hash strtab
;
3349 static boolean aout_link_input_bfd
3350 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
));
3351 static boolean aout_link_write_symbols
3352 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
, int *symbol_map
));
3353 static boolean aout_link_write_other_symbol
3354 PARAMS ((struct aout_link_hash_entry
*, PTR
));
3355 static boolean aout_link_input_section
3356 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
,
3357 asection
*input_section
, file_ptr
*reloff_ptr
,
3358 bfd_size_type rel_size
, int *symbol_map
));
3359 static boolean aout_link_input_section_std
3360 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
,
3361 asection
*input_section
, struct reloc_std_external
*,
3362 bfd_size_type rel_size
, bfd_byte
*contents
, int *symbol_map
));
3363 static boolean aout_link_input_section_ext
3364 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
,
3365 asection
*input_section
, struct reloc_ext_external
*,
3366 bfd_size_type rel_size
, bfd_byte
*contents
, int *symbol_map
));
3367 static INLINE asection
*aout_reloc_index_to_section
3368 PARAMS ((bfd
*, int));
3369 static boolean aout_link_reloc_link_order
3370 PARAMS ((struct aout_final_link_info
*, asection
*,
3371 struct bfd_link_order
*));
3373 /* Do the final link step. This is called on the output BFD. The
3374 INFO structure should point to a list of BFDs linked through the
3375 link_next field which can be used to find each BFD which takes part
3376 in the output. Also, each section in ABFD should point to a list
3377 of bfd_link_order structures which list all the input sections for
3378 the output section. */
3381 NAME(aout
,final_link
) (abfd
, info
, callback
)
3383 struct bfd_link_info
*info
;
3384 void (*callback
) PARAMS ((bfd
*, file_ptr
*, file_ptr
*, file_ptr
*));
3386 struct aout_final_link_info aout_info
;
3388 bfd_size_type text_size
;
3390 register struct bfd_link_order
*p
;
3392 boolean have_link_order_relocs
;
3394 aout_info
.info
= info
;
3395 aout_info
.output_bfd
= abfd
;
3397 if (! info
->relocateable
)
3399 exec_hdr (abfd
)->a_trsize
= 0;
3400 exec_hdr (abfd
)->a_drsize
= 0;
3404 bfd_size_type trsize
, drsize
;
3406 /* Count up the relocation sizes. */
3409 for (sub
= info
->input_bfds
; sub
!= (bfd
*) NULL
; sub
= sub
->link_next
)
3411 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
3413 trsize
+= exec_hdr (sub
)->a_trsize
;
3414 drsize
+= exec_hdr (sub
)->a_drsize
;
3418 /* FIXME: We need to identify the .text and .data sections
3419 and call get_reloc_upper_bound and canonicalize_reloc to
3420 work out the number of relocs needed, and then multiply
3421 by the reloc size. */
3425 if (obj_textsec (abfd
) != (asection
*) NULL
)
3426 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
3428 * obj_reloc_entry_size (abfd
));
3429 exec_hdr (abfd
)->a_trsize
= trsize
;
3430 if (obj_datasec (abfd
) != (asection
*) NULL
)
3431 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
3433 * obj_reloc_entry_size (abfd
));
3434 exec_hdr (abfd
)->a_drsize
= drsize
;
3437 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
3439 /* Adjust the section sizes and vmas according to the magic number.
3440 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3441 filepos for each section. */
3442 if (! NAME(aout
,adjust_sizes_and_vmas
) (abfd
, &text_size
, &text_end
))
3445 /* The relocation and symbol file positions differ among a.out
3446 targets. We are passed a callback routine from the backend
3447 specific code to handle this.
3448 FIXME: At this point we do not know how much space the symbol
3449 table will require. This will not work for any (nonstandard)
3450 a.out target that needs to know the symbol table size before it
3451 can compute the relocation file positions. This may or may not
3452 be the case for the hp300hpux target, for example. */
3453 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
3455 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
3456 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
3457 obj_sym_filepos (abfd
) = aout_info
.symoff
;
3459 /* We keep a count of the symbols as we output them. */
3460 obj_aout_external_sym_count (abfd
) = 0;
3462 /* We accumulate the string table as we write out the symbols. */
3463 if (! stringtab_init (&aout_info
.strtab
))
3466 /* The most time efficient way to do the link would be to read all
3467 the input object files into memory and then sort out the
3468 information into the output file. Unfortunately, that will
3469 probably use too much memory. Another method would be to step
3470 through everything that composes the text section and write it
3471 out, and then everything that composes the data section and write
3472 it out, and then write out the relocs, and then write out the
3473 symbols. Unfortunately, that requires reading stuff from each
3474 input file several times, and we will not be able to keep all the
3475 input files open simultaneously, and reopening them will be slow.
3477 What we do is basically process one input file at a time. We do
3478 everything we need to do with an input file once--copy over the
3479 section contents, handle the relocation information, and write
3480 out the symbols--and then we throw away the information we read
3481 from it. This approach requires a lot of lseeks of the output
3482 file, which is unfortunate but still faster than reopening a lot
3485 We use the output_has_begun field of the input BFDs to see
3486 whether we have already handled it. */
3487 for (sub
= info
->input_bfds
; sub
!= (bfd
*) NULL
; sub
= sub
->link_next
)
3488 sub
->output_has_begun
= false;
3490 have_link_order_relocs
= false;
3491 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
3493 for (p
= o
->link_order_head
;
3494 p
!= (struct bfd_link_order
*) NULL
;
3497 if (p
->type
== bfd_indirect_link_order
3498 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
3499 == bfd_target_aout_flavour
))
3503 input_bfd
= p
->u
.indirect
.section
->owner
;
3504 if (! input_bfd
->output_has_begun
)
3506 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
3508 input_bfd
->output_has_begun
= true;
3511 else if (p
->type
== bfd_section_reloc_link_order
3512 || p
->type
== bfd_symbol_reloc_link_order
)
3514 /* These are handled below. */
3515 have_link_order_relocs
= true;
3519 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
3525 /* Write out any symbols that we have not already written out. */
3526 aout_link_hash_traverse (aout_hash_table (info
),
3527 aout_link_write_other_symbol
,
3530 /* Now handle any relocs we were asked to create by the linker.
3531 These did not come from any input file. We must do these after
3532 we have written out all the symbols, so that we know the symbol
3534 if (have_link_order_relocs
)
3536 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
3538 for (p
= o
->link_order_head
;
3539 p
!= (struct bfd_link_order
*) NULL
;
3542 if (p
->type
== bfd_section_reloc_link_order
3543 || p
->type
== bfd_symbol_reloc_link_order
)
3545 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
3552 /* Finish up any dynamic linking we may be doing. */
3553 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
3555 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
3559 /* Update the header information. */
3560 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
3561 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
3562 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
3563 obj_textsec (abfd
)->reloc_count
=
3564 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
3565 obj_datasec (abfd
)->reloc_count
=
3566 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
3568 /* Write out the string table. */
3569 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
3571 return emit_stringtab (abfd
, &aout_info
.strtab
);
3574 /* Link an a.out input BFD into the output file. */
3577 aout_link_input_bfd (finfo
, input_bfd
)
3578 struct aout_final_link_info
*finfo
;
3581 bfd_size_type sym_count
;
3582 int *symbol_map
= NULL
;
3584 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
3586 /* If this is a dynamic object, it may need special handling. */
3587 if ((input_bfd
->flags
& DYNAMIC
) != 0
3588 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
3590 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
3591 (finfo
->info
, input_bfd
));
3594 /* Get the symbols. We probably have them already, unless
3595 finfo->info->keep_memory is false. */
3596 if (! aout_get_external_symbols (input_bfd
))
3599 sym_count
= obj_aout_external_sym_count (input_bfd
);
3600 symbol_map
= (int *) malloc ((size_t) sym_count
* sizeof (int));
3601 if (symbol_map
== NULL
&& sym_count
!= 0)
3603 bfd_set_error (bfd_error_no_memory
);
3607 /* Write out the symbols and get a map of the new indices. */
3608 if (! aout_link_write_symbols (finfo
, input_bfd
, symbol_map
))
3611 /* Relocate and write out the sections. */
3612 if (! aout_link_input_section (finfo
, input_bfd
,
3613 obj_textsec (input_bfd
),
3615 exec_hdr (input_bfd
)->a_trsize
,
3617 || ! aout_link_input_section (finfo
, input_bfd
,
3618 obj_datasec (input_bfd
),
3620 exec_hdr (input_bfd
)->a_drsize
,
3624 /* If we are not keeping memory, we don't need the symbols any
3625 longer. We still need them if we are keeping memory, because the
3626 strings in the hash table point into them. */
3627 if (! finfo
->info
->keep_memory
)
3629 if (! aout_link_free_symbols (input_bfd
))
3633 if (symbol_map
!= NULL
)
3637 if (symbol_map
!= NULL
)
3642 /* Adjust and write out the symbols for an a.out file. Set the new
3643 symbol indices into a symbol_map. */
3646 aout_link_write_symbols (finfo
, input_bfd
, symbol_map
)
3647 struct aout_final_link_info
*finfo
;
3652 bfd_size_type sym_count
;
3654 enum bfd_link_strip strip
;
3655 enum bfd_link_discard discard
;
3656 struct external_nlist
*output_syms
= NULL
;
3657 struct external_nlist
*outsym
;
3658 bfd_size_type strtab_index
;
3659 register struct external_nlist
*sym
;
3660 struct external_nlist
*sym_end
;
3661 struct aout_link_hash_entry
**sym_hash
;
3663 boolean skip_indirect
;
3665 output_bfd
= finfo
->output_bfd
;
3666 sym_count
= obj_aout_external_sym_count (input_bfd
);
3667 strings
= obj_aout_external_strings (input_bfd
);
3668 strip
= finfo
->info
->strip
;
3669 discard
= finfo
->info
->discard
;
3670 output_syms
= ((struct external_nlist
*)
3671 malloc ((size_t) (sym_count
+ 1) * EXTERNAL_NLIST_SIZE
));
3672 if (output_syms
== NULL
)
3674 bfd_set_error (bfd_error_no_memory
);
3677 outsym
= output_syms
;
3679 /* First write out a symbol for this object file, unless we are
3680 discarding such symbols. */
3681 if (strip
!= strip_all
3682 && (strip
!= strip_some
3683 || bfd_hash_lookup (finfo
->info
->keep_hash
, input_bfd
->filename
,
3684 false, false) != NULL
)
3685 && discard
!= discard_all
)
3687 bfd_h_put_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
3688 bfd_h_put_8 (output_bfd
, 0, outsym
->e_other
);
3689 bfd_h_put_16 (output_bfd
, (bfd_vma
) 0, outsym
->e_desc
);
3690 strtab_index
= add_to_stringtab (output_bfd
, &finfo
->strtab
,
3691 input_bfd
->filename
, false);
3692 if (strtab_index
== (bfd_size_type
) -1)
3694 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
3695 PUT_WORD (output_bfd
,
3696 (bfd_get_section_vma (output_bfd
,
3697 obj_textsec (input_bfd
)->output_section
)
3698 + obj_textsec (input_bfd
)->output_offset
),
3700 ++obj_aout_external_sym_count (output_bfd
);
3705 skip_indirect
= false;
3706 sym
= obj_aout_external_syms (input_bfd
);
3707 sym_end
= sym
+ sym_count
;
3708 sym_hash
= obj_aout_sym_hashes (input_bfd
);
3709 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
3713 struct aout_link_hash_entry
*h
;
3721 type
= bfd_h_get_8 (input_bfd
, sym
->e_type
);
3722 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
3728 /* Pass this symbol through. It is the target of an
3729 indirect or warning symbol. */
3730 val
= GET_WORD (input_bfd
, sym
->e_value
);
3733 else if (skip_indirect
)
3735 /* Skip this symbol, which is the target of an indirect
3736 symbol that we have changed to no longer be an indirect
3738 skip_indirect
= false;
3743 struct aout_link_hash_entry
*hresolve
;
3745 /* We have saved the hash table entry for this symbol, if
3746 there is one. Note that we could just look it up again
3747 in the hash table, provided we first check that it is an
3751 /* If this is an indirect or warning symbol, then change
3752 hresolve to the base symbol. We also change *sym_hash so
3753 that the relocation routines relocate against the real
3756 if (h
!= (struct aout_link_hash_entry
*) NULL
3757 && (h
->root
.type
== bfd_link_hash_indirect
3758 || h
->root
.type
== bfd_link_hash_warning
))
3760 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3761 while (hresolve
->root
.type
== bfd_link_hash_indirect
3762 || hresolve
->root
.type
== bfd_link_hash_warning
)
3763 hresolve
= ((struct aout_link_hash_entry
*)
3764 hresolve
->root
.u
.i
.link
);
3765 *sym_hash
= hresolve
;
3768 /* If the symbol has already been written out, skip it. */
3769 if (h
!= (struct aout_link_hash_entry
*) NULL
3770 && h
->root
.type
!= bfd_link_hash_warning
3773 if ((type
& N_TYPE
) == N_INDR
)
3774 skip_indirect
= true;
3775 *symbol_map
= h
->indx
;
3779 /* See if we are stripping this symbol. */
3785 case strip_debugger
:
3786 if ((type
& N_STAB
) != 0)
3790 if (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, false, false)
3800 if (h
!= (struct aout_link_hash_entry
*) NULL
)
3805 /* Get the value of the symbol. */
3806 if ((type
& N_TYPE
) == N_TEXT
3808 symsec
= obj_textsec (input_bfd
);
3809 else if ((type
& N_TYPE
) == N_DATA
3811 symsec
= obj_datasec (input_bfd
);
3812 else if ((type
& N_TYPE
) == N_BSS
3814 symsec
= obj_bsssec (input_bfd
);
3815 else if ((type
& N_TYPE
) == N_ABS
3817 symsec
= bfd_abs_section_ptr
;
3818 else if (((type
& N_TYPE
) == N_INDR
3819 && (hresolve
== (struct aout_link_hash_entry
*) NULL
3820 || (hresolve
->root
.type
!= bfd_link_hash_defined
3821 && hresolve
->root
.type
!= bfd_link_hash_common
)))
3822 || type
== N_WARNING
)
3824 /* Pass the next symbol through unchanged. The
3825 condition above for indirect symbols is so that if
3826 the indirect symbol was defined, we output it with
3827 the correct definition so the debugger will
3830 val
= GET_WORD (input_bfd
, sym
->e_value
);
3833 else if ((type
& N_STAB
) != 0)
3835 val
= GET_WORD (input_bfd
, sym
->e_value
);
3840 /* If we get here with an indirect symbol, it means that
3841 we are outputting it with a real definition. In such
3842 a case we do not want to output the next symbol,
3843 which is the target of the indirection. */
3844 if ((type
& N_TYPE
) == N_INDR
)
3845 skip_indirect
= true;
3849 /* We need to get the value from the hash table. We use
3850 hresolve so that if we have defined an indirect
3851 symbol we output the final definition. */
3852 if (h
== (struct aout_link_hash_entry
*) NULL
)
3854 switch (type
& N_TYPE
)
3857 symsec
= obj_textsec (input_bfd
);
3860 symsec
= obj_datasec (input_bfd
);
3863 symsec
= obj_bsssec (input_bfd
);
3866 symsec
= bfd_abs_section_ptr
;
3873 else if (hresolve
->root
.type
== bfd_link_hash_defined
)
3875 asection
*input_section
;
3876 asection
*output_section
;
3878 /* This case means a common symbol which was turned
3879 into a defined symbol. */
3880 input_section
= hresolve
->root
.u
.def
.section
;
3881 output_section
= input_section
->output_section
;
3882 BFD_ASSERT (bfd_is_abs_section (output_section
)
3883 || output_section
->owner
== output_bfd
);
3884 val
= (hresolve
->root
.u
.def
.value
3885 + bfd_get_section_vma (output_bfd
, output_section
)
3886 + input_section
->output_offset
);
3888 /* Get the correct type based on the section. If
3889 this is a constructed set, force it to be
3890 globally visible. */
3899 if (output_section
== obj_textsec (output_bfd
))
3901 else if (output_section
== obj_datasec (output_bfd
))
3903 else if (output_section
== obj_bsssec (output_bfd
))
3908 else if (hresolve
->root
.type
== bfd_link_hash_common
)
3909 val
= hresolve
->root
.u
.c
.size
;
3910 else if (hresolve
->root
.type
== bfd_link_hash_weak
)
3918 if (symsec
!= (asection
*) NULL
)
3919 val
= (symsec
->output_section
->vma
3920 + symsec
->output_offset
3921 + (GET_WORD (input_bfd
, sym
->e_value
)
3924 /* If this is a global symbol set the written flag, and if
3925 it is a local symbol see if we should discard it. */
3926 if (h
!= (struct aout_link_hash_entry
*) NULL
)
3929 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3931 else if ((type
& N_TYPE
) != N_SETT
3932 && (type
& N_TYPE
) != N_SETD
3933 && (type
& N_TYPE
) != N_SETB
3934 && (type
& N_TYPE
) != N_SETA
)
3941 if (*name
== *finfo
->info
->lprefix
3942 && (finfo
->info
->lprefix_len
== 1
3943 || strncmp (name
, finfo
->info
->lprefix
,
3944 finfo
->info
->lprefix_len
) == 0))
3959 /* Copy this symbol into the list of symbols we are going to
3961 bfd_h_put_8 (output_bfd
, type
, outsym
->e_type
);
3962 bfd_h_put_8 (output_bfd
, bfd_h_get_8 (input_bfd
, sym
->e_other
),
3964 bfd_h_put_16 (output_bfd
, bfd_h_get_16 (input_bfd
, sym
->e_desc
),
3967 if (! finfo
->info
->keep_memory
)
3969 /* name points into a string table which we are going to
3970 free. If there is a hash table entry, use that string.
3971 Otherwise, copy name into memory. */
3972 if (h
!= (struct aout_link_hash_entry
*) NULL
)
3973 name
= (*sym_hash
)->root
.root
.string
;
3977 strtab_index
= add_to_stringtab (output_bfd
, &finfo
->strtab
,
3979 if (strtab_index
== (bfd_size_type
) -1)
3981 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
3982 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
3983 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
3984 ++obj_aout_external_sym_count (output_bfd
);
3988 /* Write out the output symbols we have just constructed. */
3989 if (outsym
> output_syms
)
3991 bfd_size_type outsym_count
;
3993 if (bfd_seek (output_bfd
, finfo
->symoff
, SEEK_SET
) != 0)
3995 outsym_count
= outsym
- output_syms
;
3996 if (bfd_write ((PTR
) output_syms
, (bfd_size_type
) EXTERNAL_NLIST_SIZE
,
3997 (bfd_size_type
) outsym_count
, output_bfd
)
3998 != outsym_count
* EXTERNAL_NLIST_SIZE
)
4000 finfo
->symoff
+= outsym_count
* EXTERNAL_NLIST_SIZE
;
4003 if (output_syms
!= NULL
)
4007 if (output_syms
!= NULL
)
4012 /* Write out a symbol that was not associated with an a.out input
4016 aout_link_write_other_symbol (h
, data
)
4017 struct aout_link_hash_entry
*h
;
4020 struct aout_final_link_info
*finfo
= (struct aout_final_link_info
*) data
;
4024 struct external_nlist outsym
;
4027 output_bfd
= finfo
->output_bfd
;
4029 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
4031 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
4032 (output_bfd
, finfo
->info
, h
)))
4034 /* FIXME: No way to handle errors. */
4044 if (finfo
->info
->strip
== strip_all
4045 || (finfo
->info
->strip
== strip_some
4046 && bfd_hash_lookup (finfo
->info
->keep_hash
, h
->root
.root
.string
,
4047 false, false) == NULL
))
4050 switch (h
->root
.type
)
4054 /* Avoid variable not initialized warnings. */
4056 case bfd_link_hash_new
:
4057 /* This can happen for set symbols when sets are not being
4060 case bfd_link_hash_undefined
:
4061 type
= N_UNDF
| N_EXT
;
4064 case bfd_link_hash_defined
:
4068 sec
= h
->root
.u
.def
.section
->output_section
;
4069 BFD_ASSERT (bfd_is_abs_section (sec
)
4070 || sec
->owner
== output_bfd
);
4071 if (sec
== obj_textsec (output_bfd
))
4072 type
= N_TEXT
| N_EXT
;
4073 else if (sec
== obj_datasec (output_bfd
))
4074 type
= N_DATA
| N_EXT
;
4075 else if (sec
== obj_bsssec (output_bfd
))
4076 type
= N_BSS
| N_EXT
;
4078 type
= N_ABS
| N_EXT
;
4079 val
= (h
->root
.u
.def
.value
4081 + h
->root
.u
.def
.section
->output_offset
);
4084 case bfd_link_hash_common
:
4085 type
= N_UNDF
| N_EXT
;
4086 val
= h
->root
.u
.c
.size
;
4088 case bfd_link_hash_weak
:
4091 case bfd_link_hash_indirect
:
4092 case bfd_link_hash_warning
:
4093 /* FIXME: Ignore these for now. The circumstances under which
4094 they should be written out are not clear to me. */
4098 bfd_h_put_8 (output_bfd
, type
, outsym
.e_type
);
4099 bfd_h_put_8 (output_bfd
, 0, outsym
.e_other
);
4100 bfd_h_put_16 (output_bfd
, 0, outsym
.e_desc
);
4101 indx
= add_to_stringtab (output_bfd
, &finfo
->strtab
, h
->root
.root
.string
,
4103 if (indx
== (bfd_size_type
) -1)
4105 /* FIXME: No way to handle errors. */
4108 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
4109 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
4111 if (bfd_seek (output_bfd
, finfo
->symoff
, SEEK_SET
) != 0
4112 || bfd_write ((PTR
) &outsym
, (bfd_size_type
) EXTERNAL_NLIST_SIZE
,
4113 (bfd_size_type
) 1, output_bfd
) != EXTERNAL_NLIST_SIZE
)
4115 /* FIXME: No way to handle errors. */
4119 finfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
4120 h
->indx
= obj_aout_external_sym_count (output_bfd
);
4121 ++obj_aout_external_sym_count (output_bfd
);
4126 /* Link an a.out section into the output file. */
4129 aout_link_input_section (finfo
, input_bfd
, input_section
, reloff_ptr
,
4130 rel_size
, symbol_map
)
4131 struct aout_final_link_info
*finfo
;
4133 asection
*input_section
;
4134 file_ptr
*reloff_ptr
;
4135 bfd_size_type rel_size
;
4138 bfd_size_type input_size
;
4139 bfd_byte
*contents
= NULL
;
4141 PTR free_relocs
= NULL
;
4143 /* Get the section contents. */
4144 input_size
= bfd_section_size (input_bfd
, input_section
);
4145 contents
= (bfd_byte
*) malloc (input_size
);
4146 if (contents
== NULL
&& input_size
!= 0)
4148 bfd_set_error (bfd_error_no_memory
);
4151 if (! bfd_get_section_contents (input_bfd
, input_section
, (PTR
) contents
,
4152 (file_ptr
) 0, input_size
))
4155 /* Read in the relocs if we haven't already done it. */
4156 if (aout_section_data (input_section
) != NULL
4157 && aout_section_data (input_section
)->relocs
!= NULL
)
4158 relocs
= aout_section_data (input_section
)->relocs
;
4161 relocs
= free_relocs
= (PTR
) malloc (rel_size
);
4162 if (relocs
== NULL
&& rel_size
!= 0)
4164 bfd_set_error (bfd_error_no_memory
);
4167 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4168 || bfd_read (relocs
, 1, rel_size
, input_bfd
) != rel_size
)
4172 /* Relocate the section contents. */
4173 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4175 if (! aout_link_input_section_std (finfo
, input_bfd
, input_section
,
4176 (struct reloc_std_external
*) relocs
,
4177 rel_size
, contents
, symbol_map
))
4182 if (! aout_link_input_section_ext (finfo
, input_bfd
, input_section
,
4183 (struct reloc_ext_external
*) relocs
,
4184 rel_size
, contents
, symbol_map
))
4188 /* Write out the section contents. */
4189 if (! bfd_set_section_contents (finfo
->output_bfd
,
4190 input_section
->output_section
,
4192 input_section
->output_offset
,
4196 /* If we are producing relocateable output, the relocs were
4197 modified, and we now write them out. */
4198 if (finfo
->info
->relocateable
)
4200 if (bfd_seek (finfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4202 if (bfd_write (relocs
, (bfd_size_type
) 1, rel_size
, finfo
->output_bfd
)
4205 *reloff_ptr
+= rel_size
;
4207 /* Assert that the relocs have not run into the symbols, and
4208 that if these are the text relocs they have not run into the
4210 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (finfo
->output_bfd
)
4211 && (reloff_ptr
!= &finfo
->treloff
4213 <= obj_datasec (finfo
->output_bfd
)->rel_filepos
)));
4216 if (free_relocs
!= NULL
)
4218 if (contents
!= NULL
)
4222 if (free_relocs
!= NULL
)
4224 if (contents
!= NULL
)
4229 /* Get the section corresponding to a reloc index. */
4231 static INLINE asection
*
4232 aout_reloc_index_to_section (abfd
, indx
)
4236 switch (indx
& N_TYPE
)
4239 return obj_textsec (abfd
);
4241 return obj_datasec (abfd
);
4243 return obj_bsssec (abfd
);
4246 return bfd_abs_section_ptr
;
4252 /* Relocate an a.out section using standard a.out relocs. */
4255 aout_link_input_section_std (finfo
, input_bfd
, input_section
, relocs
,
4256 rel_size
, contents
, symbol_map
)
4257 struct aout_final_link_info
*finfo
;
4259 asection
*input_section
;
4260 struct reloc_std_external
*relocs
;
4261 bfd_size_type rel_size
;
4265 boolean (*check_dynamic_reloc
) PARAMS ((struct bfd_link_info
*,
4267 struct aout_link_hash_entry
*,
4270 boolean relocateable
;
4271 struct external_nlist
*syms
;
4273 struct aout_link_hash_entry
**sym_hashes
;
4274 bfd_size_type reloc_count
;
4275 register struct reloc_std_external
*rel
;
4276 struct reloc_std_external
*rel_end
;
4278 output_bfd
= finfo
->output_bfd
;
4279 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4281 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
4282 BFD_ASSERT (input_bfd
->xvec
->header_byteorder_big_p
4283 == output_bfd
->xvec
->header_byteorder_big_p
);
4285 relocateable
= finfo
->info
->relocateable
;
4286 syms
= obj_aout_external_syms (input_bfd
);
4287 strings
= obj_aout_external_strings (input_bfd
);
4288 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4290 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4292 rel_end
= rel
+ reloc_count
;
4293 for (; rel
< rel_end
; rel
++)
4304 reloc_howto_type
*howto
;
4306 bfd_reloc_status_type r
;
4308 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4310 #ifdef MY_reloc_howto
4311 howto
= MY_reloc_howto(input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
4313 if (input_bfd
->xvec
->header_byteorder_big_p
)
4315 r_index
= ((rel
->r_index
[0] << 16)
4316 | (rel
->r_index
[1] << 8)
4318 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4319 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4320 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4321 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4322 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4323 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4324 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4328 r_index
= ((rel
->r_index
[2] << 16)
4329 | (rel
->r_index
[1] << 8)
4331 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4332 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4333 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
4334 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4335 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
4336 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4337 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4340 howto_idx
= r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4341 + 16 * r_jmptable
+ 32 * r_relative
;
4342 BFD_ASSERT (howto_idx
< TABLE_SIZE (howto_table_std
));
4343 howto
= howto_table_std
+ howto_idx
;
4348 /* We are generating a relocateable output file, and must
4349 modify the reloc accordingly. */
4352 struct aout_link_hash_entry
*h
;
4354 /* If we know the symbol this relocation is against,
4355 convert it into a relocation against a section. This
4356 is what the native linker does. */
4357 h
= sym_hashes
[r_index
];
4358 if (h
!= (struct aout_link_hash_entry
*) NULL
4359 && h
->root
.type
== bfd_link_hash_defined
)
4361 asection
*output_section
;
4363 /* Change the r_extern value. */
4364 if (output_bfd
->xvec
->header_byteorder_big_p
)
4365 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4367 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4369 /* Compute a new r_index. */
4370 output_section
= h
->root
.u
.def
.section
->output_section
;
4371 if (output_section
== obj_textsec (output_bfd
))
4373 else if (output_section
== obj_datasec (output_bfd
))
4375 else if (output_section
== obj_bsssec (output_bfd
))
4380 /* Add the symbol value and the section VMA to the
4381 addend stored in the contents. */
4382 relocation
= (h
->root
.u
.def
.value
4383 + output_section
->vma
4384 + h
->root
.u
.def
.section
->output_offset
);
4388 /* We must change r_index according to the symbol
4390 r_index
= symbol_map
[r_index
];
4396 name
= strings
+ GET_WORD (input_bfd
,
4397 syms
[r_index
].e_strx
);
4398 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
4399 (finfo
->info
, name
, input_bfd
, input_section
,
4408 /* Write out the new r_index value. */
4409 if (output_bfd
->xvec
->header_byteorder_big_p
)
4411 rel
->r_index
[0] = r_index
>> 16;
4412 rel
->r_index
[1] = r_index
>> 8;
4413 rel
->r_index
[2] = r_index
;
4417 rel
->r_index
[2] = r_index
>> 16;
4418 rel
->r_index
[1] = r_index
>> 8;
4419 rel
->r_index
[0] = r_index
;
4426 /* This is a relocation against a section. We must
4427 adjust by the amount that the section moved. */
4428 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4429 relocation
= (section
->output_section
->vma
4430 + section
->output_offset
4434 /* Change the address of the relocation. */
4435 PUT_WORD (output_bfd
,
4436 r_addr
+ input_section
->output_offset
,
4439 /* Adjust a PC relative relocation by removing the reference
4440 to the original address in the section and including the
4441 reference to the new address. */
4443 relocation
-= (input_section
->output_section
->vma
4444 + input_section
->output_offset
4445 - input_section
->vma
);
4447 if (relocation
== 0)
4450 r
= _bfd_relocate_contents (howto
,
4451 input_bfd
, relocation
,
4456 /* We are generating an executable, and must do a full
4460 struct aout_link_hash_entry
*h
;
4462 h
= sym_hashes
[r_index
];
4464 if (check_dynamic_reloc
!= NULL
)
4468 if (! ((*check_dynamic_reloc
)
4469 (finfo
->info
, input_bfd
, input_section
, h
,
4476 if (h
!= (struct aout_link_hash_entry
*) NULL
4477 && h
->root
.type
== bfd_link_hash_defined
)
4479 relocation
= (h
->root
.u
.def
.value
4480 + h
->root
.u
.def
.section
->output_section
->vma
4481 + h
->root
.u
.def
.section
->output_offset
);
4483 else if (h
!= (struct aout_link_hash_entry
*) NULL
4484 && h
->root
.type
== bfd_link_hash_weak
)
4490 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4491 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
4492 (finfo
->info
, name
, input_bfd
, input_section
,
4502 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4503 relocation
= (section
->output_section
->vma
4504 + section
->output_offset
4507 relocation
+= input_section
->vma
;
4510 r
= _bfd_final_link_relocate (howto
,
4511 input_bfd
, input_section
,
4512 contents
, r_addr
, relocation
,
4516 if (r
!= bfd_reloc_ok
)
4521 case bfd_reloc_outofrange
:
4523 case bfd_reloc_overflow
:
4528 name
= strings
+ GET_WORD (input_bfd
,
4529 syms
[r_index
].e_strx
);
4534 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4535 name
= bfd_section_name (input_bfd
, s
);
4537 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
4538 (finfo
->info
, name
, howto
->name
,
4539 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
)))
4550 /* Relocate an a.out section using extended a.out relocs. */
4553 aout_link_input_section_ext (finfo
, input_bfd
, input_section
, relocs
,
4554 rel_size
, contents
, symbol_map
)
4555 struct aout_final_link_info
*finfo
;
4557 asection
*input_section
;
4558 struct reloc_ext_external
*relocs
;
4559 bfd_size_type rel_size
;
4563 boolean (*check_dynamic_reloc
) PARAMS ((struct bfd_link_info
*,
4565 struct aout_link_hash_entry
*,
4568 boolean relocateable
;
4569 struct external_nlist
*syms
;
4571 struct aout_link_hash_entry
**sym_hashes
;
4572 bfd_size_type reloc_count
;
4573 register struct reloc_ext_external
*rel
;
4574 struct reloc_ext_external
*rel_end
;
4576 output_bfd
= finfo
->output_bfd
;
4577 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4579 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4580 BFD_ASSERT (input_bfd
->xvec
->header_byteorder_big_p
4581 == output_bfd
->xvec
->header_byteorder_big_p
);
4583 relocateable
= finfo
->info
->relocateable
;
4584 syms
= obj_aout_external_syms (input_bfd
);
4585 strings
= obj_aout_external_strings (input_bfd
);
4586 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4588 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4590 rel_end
= rel
+ reloc_count
;
4591 for (; rel
< rel_end
; rel
++)
4600 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4602 if (input_bfd
->xvec
->header_byteorder_big_p
)
4604 r_index
= ((rel
->r_index
[0] << 16)
4605 | (rel
->r_index
[1] << 8)
4607 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4608 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4609 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4613 r_index
= ((rel
->r_index
[2] << 16)
4614 | (rel
->r_index
[1] << 8)
4616 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4617 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4618 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4621 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4623 BFD_ASSERT (r_type
>= 0
4624 && r_type
< TABLE_SIZE (howto_table_ext
));
4628 /* We are generating a relocateable output file, and must
4629 modify the reloc accordingly. */
4632 struct aout_link_hash_entry
*h
;
4634 /* If we know the symbol this relocation is against,
4635 convert it into a relocation against a section. This
4636 is what the native linker does. */
4637 h
= sym_hashes
[r_index
];
4638 if (h
!= (struct aout_link_hash_entry
*) NULL
4639 && h
->root
.type
== bfd_link_hash_defined
)
4641 asection
*output_section
;
4643 /* Change the r_extern value. */
4644 if (output_bfd
->xvec
->header_byteorder_big_p
)
4645 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4647 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4649 /* Compute a new r_index. */
4650 output_section
= h
->root
.u
.def
.section
->output_section
;
4651 if (output_section
== obj_textsec (output_bfd
))
4653 else if (output_section
== obj_datasec (output_bfd
))
4655 else if (output_section
== obj_bsssec (output_bfd
))
4660 /* Add the symbol value and the section VMA to the
4662 relocation
= (h
->root
.u
.def
.value
4663 + output_section
->vma
4664 + h
->root
.u
.def
.section
->output_offset
);
4666 /* Now RELOCATION is the VMA of the final
4667 destination. If this is a PC relative reloc,
4668 then ADDEND is the negative of the source VMA.
4669 We want to set ADDEND to the difference between
4670 the destination VMA and the source VMA, which
4671 means we must adjust RELOCATION by the change in
4672 the source VMA. This is done below. */
4676 /* We must change r_index according to the symbol
4678 r_index
= symbol_map
[r_index
];
4685 + GET_WORD (input_bfd
, syms
[r_index
].e_strx
));
4686 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
4687 (finfo
->info
, name
, input_bfd
, input_section
,
4695 /* If this is a PC relative reloc, then the addend
4696 is the negative of the source VMA. We must
4697 adjust it by the change in the source VMA. This
4701 /* Write out the new r_index value. */
4702 if (output_bfd
->xvec
->header_byteorder_big_p
)
4704 rel
->r_index
[0] = r_index
>> 16;
4705 rel
->r_index
[1] = r_index
>> 8;
4706 rel
->r_index
[2] = r_index
;
4710 rel
->r_index
[2] = r_index
>> 16;
4711 rel
->r_index
[1] = r_index
>> 8;
4712 rel
->r_index
[0] = r_index
;
4719 /* This is a relocation against a section. We must
4720 adjust by the amount that the section moved. */
4721 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4722 relocation
= (section
->output_section
->vma
4723 + section
->output_offset
4726 /* If this is a PC relative reloc, then the addend is
4727 the difference in VMA between the destination and the
4728 source. We have just adjusted for the change in VMA
4729 of the destination, so we must also adjust by the
4730 change in VMA of the source. This is done below. */
4733 /* As described above, we must always adjust a PC relative
4734 reloc by the change in VMA of the source. */
4735 if (howto_table_ext
[r_type
].pc_relative
)
4736 relocation
-= (input_section
->output_section
->vma
4737 + input_section
->output_offset
4738 - input_section
->vma
);
4740 /* Change the addend if necessary. */
4741 if (relocation
!= 0)
4742 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4744 /* Change the address of the relocation. */
4745 PUT_WORD (output_bfd
,
4746 r_addr
+ input_section
->output_offset
,
4751 bfd_reloc_status_type r
;
4753 /* We are generating an executable, and must do a full
4757 struct aout_link_hash_entry
*h
;
4759 h
= sym_hashes
[r_index
];
4761 if (check_dynamic_reloc
!= NULL
)
4765 if (! ((*check_dynamic_reloc
)
4766 (finfo
->info
, input_bfd
, input_section
, h
,
4773 if (h
!= (struct aout_link_hash_entry
*) NULL
4774 && h
->root
.type
== bfd_link_hash_defined
)
4776 relocation
= (h
->root
.u
.def
.value
4777 + h
->root
.u
.def
.section
->output_section
->vma
4778 + h
->root
.u
.def
.section
->output_offset
);
4780 else if (h
!= (struct aout_link_hash_entry
*) NULL
4781 && h
->root
.type
== bfd_link_hash_weak
)
4787 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4788 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
4789 (finfo
->info
, name
, input_bfd
, input_section
,
4799 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4801 /* If this is a PC relative reloc, then R_ADDEND is the
4802 difference between the two vmas, or
4803 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4805 old_dest_sec == section->vma
4807 old_src_sec == input_section->vma
4809 old_src_off == r_addr
4811 _bfd_final_link_relocate expects RELOCATION +
4812 R_ADDEND to be the VMA of the destination minus
4813 r_addr (the minus r_addr is because this relocation
4814 is not pcrel_offset, which is a bit confusing and
4815 should, perhaps, be changed), or
4818 new_dest_sec == output_section->vma + output_offset
4819 We arrange for this to happen by setting RELOCATION to
4820 new_dest_sec + old_src_sec - old_dest_sec
4822 If this is not a PC relative reloc, then R_ADDEND is
4823 simply the VMA of the destination, so we set
4824 RELOCATION to the change in the destination VMA, or
4825 new_dest_sec - old_dest_sec
4827 relocation
= (section
->output_section
->vma
4828 + section
->output_offset
4830 if (howto_table_ext
[r_type
].pc_relative
)
4831 relocation
+= input_section
->vma
;
4834 r
= _bfd_final_link_relocate (howto_table_ext
+ r_type
,
4835 input_bfd
, input_section
,
4836 contents
, r_addr
, relocation
,
4838 if (r
!= bfd_reloc_ok
)
4843 case bfd_reloc_outofrange
:
4845 case bfd_reloc_overflow
:
4850 name
= strings
+ GET_WORD (input_bfd
,
4851 syms
[r_index
].e_strx
);
4856 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4857 name
= bfd_section_name (input_bfd
, s
);
4859 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
4860 (finfo
->info
, name
, howto_table_ext
[r_type
].name
,
4861 r_addend
, input_bfd
, input_section
, r_addr
)))
4873 /* Handle a link order which is supposed to generate a reloc. */
4876 aout_link_reloc_link_order (finfo
, o
, p
)
4877 struct aout_final_link_info
*finfo
;
4879 struct bfd_link_order
*p
;
4881 struct bfd_link_order_reloc
*pr
;
4884 const reloc_howto_type
*howto
;
4885 file_ptr
*reloff_ptr
;
4886 struct reloc_std_external srel
;
4887 struct reloc_ext_external erel
;
4892 if (p
->type
== bfd_section_reloc_link_order
)
4895 if (bfd_is_abs_section (pr
->u
.section
))
4896 r_index
= N_ABS
| N_EXT
;
4899 BFD_ASSERT (pr
->u
.section
->owner
== finfo
->output_bfd
);
4900 r_index
= pr
->u
.section
->target_index
;
4905 struct aout_link_hash_entry
*h
;
4907 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
4909 h
= aout_link_hash_lookup (aout_hash_table (finfo
->info
),
4910 pr
->u
.name
, false, false, true);
4911 if (h
!= (struct aout_link_hash_entry
*) NULL
4916 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
4917 (finfo
->info
, pr
->u
.name
, (bfd
*) NULL
,
4918 (asection
*) NULL
, (bfd_vma
) 0)))
4924 howto
= bfd_reloc_type_lookup (finfo
->output_bfd
, pr
->reloc
);
4925 if (howto
== (const reloc_howto_type
*) NULL
)
4927 bfd_set_error (bfd_error_bad_value
);
4931 if (o
== obj_textsec (finfo
->output_bfd
))
4932 reloff_ptr
= &finfo
->treloff
;
4933 else if (o
== obj_datasec (finfo
->output_bfd
))
4934 reloff_ptr
= &finfo
->dreloff
;
4938 if (obj_reloc_entry_size (finfo
->output_bfd
) == RELOC_STD_SIZE
)
4947 MY_put_reloc(finfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
, &srel
);
4949 r_pcrel
= howto
->pc_relative
;
4950 r_baserel
= (howto
->type
& 8) != 0;
4951 r_jmptable
= (howto
->type
& 16) != 0;
4952 r_relative
= (howto
->type
& 32) != 0;
4953 r_length
= howto
->size
;
4955 PUT_WORD (finfo
->output_bfd
, p
->offset
, srel
.r_address
);
4956 if (finfo
->output_bfd
->xvec
->header_byteorder_big_p
)
4958 srel
.r_index
[0] = r_index
>> 16;
4959 srel
.r_index
[1] = r_index
>> 8;
4960 srel
.r_index
[2] = r_index
;
4962 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
4963 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
4964 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
4965 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
4966 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
4967 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
4971 srel
.r_index
[2] = r_index
>> 16;
4972 srel
.r_index
[1] = r_index
>> 8;
4973 srel
.r_index
[0] = r_index
;
4975 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
4976 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
4977 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
4978 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
4979 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
4980 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
4983 rel_ptr
= (PTR
) &srel
;
4985 /* We have to write the addend into the object file, since
4986 standard a.out relocs are in place. It would be more
4987 reliable if we had the current contents of the file here,
4988 rather than assuming zeroes, but we can't read the file since
4989 it was opened using bfd_openw. */
4990 if (pr
->addend
!= 0)
4993 bfd_reloc_status_type r
;
4997 size
= bfd_get_reloc_size (howto
);
4998 buf
= (bfd_byte
*) bfd_zmalloc (size
);
4999 if (buf
== (bfd_byte
*) NULL
)
5001 bfd_set_error (bfd_error_no_memory
);
5004 r
= _bfd_relocate_contents (howto
, finfo
->output_bfd
,
5011 case bfd_reloc_outofrange
:
5013 case bfd_reloc_overflow
:
5014 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
5016 (p
->type
== bfd_section_reloc_link_order
5017 ? bfd_section_name (finfo
->output_bfd
,
5020 howto
->name
, pr
->addend
, (bfd
*) NULL
,
5021 (asection
*) NULL
, (bfd_vma
) 0)))
5028 ok
= bfd_set_section_contents (finfo
->output_bfd
, o
,
5030 (file_ptr
) p
->offset
,
5039 PUT_WORD (finfo
->output_bfd
, p
->offset
, erel
.r_address
);
5041 if (finfo
->output_bfd
->xvec
->header_byteorder_big_p
)
5043 erel
.r_index
[0] = r_index
>> 16;
5044 erel
.r_index
[1] = r_index
>> 8;
5045 erel
.r_index
[2] = r_index
;
5047 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
5048 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
5052 erel
.r_index
[2] = r_index
>> 16;
5053 erel
.r_index
[1] = r_index
>> 8;
5054 erel
.r_index
[0] = r_index
;
5056 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
5057 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
5060 PUT_WORD (finfo
->output_bfd
, pr
->addend
, erel
.r_addend
);
5062 rel_ptr
= (PTR
) &erel
;
5065 if (bfd_seek (finfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
5066 || (bfd_write (rel_ptr
, (bfd_size_type
) 1,
5067 obj_reloc_entry_size (finfo
->output_bfd
),
5069 != obj_reloc_entry_size (finfo
->output_bfd
)))
5072 *reloff_ptr
+= obj_reloc_entry_size (finfo
->output_bfd
);
5074 /* Assert that the relocs have not run into the symbols, and that n
5075 the text relocs have not run into the data relocs. */
5076 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (finfo
->output_bfd
)
5077 && (reloff_ptr
!= &finfo
->treloff
5079 <= obj_datasec (finfo
->output_bfd
)->rel_filepos
)));