1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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.) */
120 #define KEEPIT udata.i
122 #include <string.h> /* For strchr and friends */
129 #include "aout/aout64.h"
130 #include "aout/stab_gnu.h"
133 static boolean aout_get_external_symbols
PARAMS ((bfd
*));
134 static boolean translate_from_native_sym_flags
135 PARAMS ((bfd
*, aout_symbol_type
*));
136 static boolean translate_to_native_sym_flags
137 PARAMS ((bfd
*, asymbol
*, struct external_nlist
*));
144 The file @file{aoutx.h} provides for both the @emph{standard}
145 and @emph{extended} forms of a.out relocation records.
147 The standard records contain only an
148 address, a symbol index, and a type field. The extended records
149 (used on 29ks and sparcs) also have a full integer for an
153 #ifndef CTOR_TABLE_RELOC_HOWTO
154 #define CTOR_TABLE_RELOC_IDX 2
155 #define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \
156 ? howto_table_ext : howto_table_std) \
157 + CTOR_TABLE_RELOC_IDX)
160 #ifndef MY_swap_std_reloc_in
161 #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
164 #ifndef MY_swap_std_reloc_out
165 #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
168 #define howto_table_ext NAME(aout,ext_howto_table)
169 #define howto_table_std NAME(aout,std_howto_table)
171 reloc_howto_type howto_table_ext
[] =
173 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
174 HOWTO(RELOC_8
, 0, 0, 8, false, 0, complain_overflow_bitfield
,0,"8", false, 0,0x000000ff, false),
175 HOWTO(RELOC_16
, 0, 1, 16, false, 0, complain_overflow_bitfield
,0,"16", false, 0,0x0000ffff, false),
176 HOWTO(RELOC_32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"32", false, 0,0xffffffff, false),
177 HOWTO(RELOC_DISP8
, 0, 0, 8, true, 0, complain_overflow_signed
,0,"DISP8", false, 0,0x000000ff, false),
178 HOWTO(RELOC_DISP16
, 0, 1, 16, true, 0, complain_overflow_signed
,0,"DISP16", false, 0,0x0000ffff, false),
179 HOWTO(RELOC_DISP32
, 0, 2, 32, true, 0, complain_overflow_signed
,0,"DISP32", false, 0,0xffffffff, false),
180 HOWTO(RELOC_WDISP30
,2, 2, 30, true, 0, complain_overflow_signed
,0,"WDISP30", false, 0,0x3fffffff, false),
181 HOWTO(RELOC_WDISP22
,2, 2, 22, true, 0, complain_overflow_signed
,0,"WDISP22", false, 0,0x003fffff, false),
182 HOWTO(RELOC_HI22
, 10, 2, 22, false, 0, complain_overflow_bitfield
,0,"HI22", false, 0,0x003fffff, false),
183 HOWTO(RELOC_22
, 0, 2, 22, false, 0, complain_overflow_bitfield
,0,"22", false, 0,0x003fffff, false),
184 HOWTO(RELOC_13
, 0, 2, 13, false, 0, complain_overflow_bitfield
,0,"13", false, 0,0x00001fff, false),
185 HOWTO(RELOC_LO10
, 0, 2, 10, false, 0, complain_overflow_dont
,0,"LO10", false, 0,0x000003ff, false),
186 HOWTO(RELOC_SFA_BASE
,0, 2, 32, false, 0, complain_overflow_bitfield
,0,"SFA_BASE", false, 0,0xffffffff, false),
187 HOWTO(RELOC_SFA_OFF13
,0,2, 32, false, 0, complain_overflow_bitfield
,0,"SFA_OFF13",false, 0,0xffffffff, false),
188 HOWTO(RELOC_BASE10
, 0, 2, 16, false, 0, complain_overflow_bitfield
,0,"BASE10", false, 0,0x0000ffff, false),
189 HOWTO(RELOC_BASE13
, 0, 2, 13, false, 0, complain_overflow_bitfield
,0,"BASE13", false, 0,0x00001fff, false),
190 HOWTO(RELOC_BASE22
, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"BASE22", false, 0,0x00000000, false),
191 HOWTO(RELOC_PC10
, 0, 2, 10, true, 0, complain_overflow_dont
,0,"PC10", false, 0,0x000003ff, true),
192 HOWTO(RELOC_PC22
, 10, 2, 22, true, 0, complain_overflow_signed
,0,"PC22", false, 0,0x003fffff, true),
193 HOWTO(RELOC_JMP_TBL
,2, 2, 30, true, 0, complain_overflow_signed
,0,"JMP_TBL", false, 0,0x3fffffff, false),
194 HOWTO(RELOC_SEGOFF16
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"SEGOFF16", false, 0,0x00000000, false),
195 HOWTO(RELOC_GLOB_DAT
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"GLOB_DAT", false, 0,0x00000000, false),
196 HOWTO(RELOC_JMP_SLOT
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"JMP_SLOT", false, 0,0x00000000, false),
197 HOWTO(RELOC_RELATIVE
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"RELATIVE", false, 0,0x00000000, false),
200 /* Convert standard reloc records to "arelent" format (incl byte swap). */
202 reloc_howto_type howto_table_std
[] = {
203 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
204 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield
,0,"8", true, 0x000000ff,0x000000ff, false),
205 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield
,0,"16", true, 0x0000ffff,0x0000ffff, false),
206 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"32", true, 0xffffffff,0xffffffff, false),
207 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield
,0,"64", true, 0xdeaddead,0xdeaddead, false),
208 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed
, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
209 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed
, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
210 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed
, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
211 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed
, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
212 HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"GOT_REL", false, 0,0x00000000, false),
213 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield
,0,"BASE16", false,0xffffffff,0xffffffff, false),
214 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"BASE32", false,0xffffffff,0xffffffff, false),
220 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"JMP_TABLE", false, 0,0x00000000, false),
228 { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 },
229 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"RELATIVE", false, 0,0x00000000, false),
237 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"BASEREL", false, 0,0x00000000, false),
240 #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
243 NAME(aout
,reloc_type_lookup
) (abfd
,code
)
245 bfd_reloc_code_real_type code
;
247 #define EXT(i,j) case i: return &howto_table_ext[j]
248 #define STD(i,j) case i: return &howto_table_std[j]
249 int ext
= obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
;
250 if (code
== BFD_RELOC_CTOR
)
251 switch (bfd_get_arch_info (abfd
)->bits_per_address
)
263 EXT (BFD_RELOC_32
, 2);
264 EXT (BFD_RELOC_HI22
, 8);
265 EXT (BFD_RELOC_LO10
, 11);
266 EXT (BFD_RELOC_32_PCREL_S2
, 6);
267 EXT (BFD_RELOC_SPARC_WDISP22
, 7);
268 EXT (BFD_RELOC_SPARC13
, 10);
269 EXT (BFD_RELOC_SPARC_GOT10
, 14);
270 EXT (BFD_RELOC_SPARC_BASE13
, 15);
271 EXT (BFD_RELOC_SPARC_GOT13
, 15);
272 EXT (BFD_RELOC_SPARC_GOT22
, 16);
273 EXT (BFD_RELOC_SPARC_PC10
, 17);
274 EXT (BFD_RELOC_SPARC_PC22
, 18);
275 EXT (BFD_RELOC_SPARC_WPLT30
, 19);
276 default: return (reloc_howto_type
*) NULL
;
282 STD (BFD_RELOC_16
, 1);
283 STD (BFD_RELOC_32
, 2);
284 STD (BFD_RELOC_8_PCREL
, 4);
285 STD (BFD_RELOC_16_PCREL
, 5);
286 STD (BFD_RELOC_32_PCREL
, 6);
287 STD (BFD_RELOC_16_BASEREL
, 9);
288 STD (BFD_RELOC_32_BASEREL
, 10);
289 default: return (reloc_howto_type
*) NULL
;
295 Internal entry points
298 @file{aoutx.h} exports several routines for accessing the
299 contents of an a.out file, which are gathered and exported in
300 turn by various format specific files (eg sunos.c).
306 aout_@var{size}_swap_exec_header_in
309 void aout_@var{size}_swap_exec_header_in,
311 struct external_exec *raw_bytes,
312 struct internal_exec *execp);
315 Swap the information in an executable header @var{raw_bytes} taken
316 from a raw byte stream memory image into the internal exec header
317 structure @var{execp}.
320 #ifndef NAME_swap_exec_header_in
322 NAME(aout
,swap_exec_header_in
) (abfd
, raw_bytes
, execp
)
324 struct external_exec
*raw_bytes
;
325 struct internal_exec
*execp
;
327 struct external_exec
*bytes
= (struct external_exec
*)raw_bytes
;
329 /* The internal_exec structure has some fields that are unused in this
330 configuration (IE for i960), so ensure that all such uninitialized
331 fields are zero'd out. There are places where two of these structs
332 are memcmp'd, and thus the contents do matter. */
333 memset ((PTR
) execp
, 0, sizeof (struct internal_exec
));
334 /* Now fill in fields in the execp, from the bytes in the raw data. */
335 execp
->a_info
= bfd_h_get_32 (abfd
, bytes
->e_info
);
336 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
337 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
338 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
339 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
340 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
341 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
342 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
344 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
349 aout_@var{size}_swap_exec_header_out
352 void aout_@var{size}_swap_exec_header_out
354 struct internal_exec *execp,
355 struct external_exec *raw_bytes);
358 Swap the information in an internal exec header structure
359 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
362 NAME(aout
,swap_exec_header_out
) (abfd
, execp
, raw_bytes
)
364 struct internal_exec
*execp
;
365 struct external_exec
*raw_bytes
;
367 struct external_exec
*bytes
= (struct external_exec
*)raw_bytes
;
369 /* Now fill in fields in the raw data, from the fields in the exec struct. */
370 bfd_h_put_32 (abfd
, execp
->a_info
, bytes
->e_info
);
371 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
372 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
373 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
374 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
375 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
376 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
377 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
380 /* Make all the section for an a.out file. */
383 NAME(aout
,make_sections
) (abfd
)
386 if (obj_textsec (abfd
) == (asection
*) NULL
387 && bfd_make_section (abfd
, ".text") == (asection
*) NULL
)
389 if (obj_datasec (abfd
) == (asection
*) NULL
390 && bfd_make_section (abfd
, ".data") == (asection
*) NULL
)
392 if (obj_bsssec (abfd
) == (asection
*) NULL
393 && bfd_make_section (abfd
, ".bss") == (asection
*) NULL
)
400 aout_@var{size}_some_aout_object_p
403 const bfd_target *aout_@var{size}_some_aout_object_p
405 const bfd_target *(*callback_to_real_object_p)());
408 Some a.out variant thinks that the file open in @var{abfd}
409 checking is an a.out file. Do some more checking, and set up
410 for access if it really is. Call back to the calling
411 environment's "finish up" function just before returning, to
412 handle any last-minute setup.
416 NAME(aout
,some_aout_object_p
) (abfd
, execp
, callback_to_real_object_p
)
418 struct internal_exec
*execp
;
419 const bfd_target
*(*callback_to_real_object_p
) PARAMS ((bfd
*));
421 struct aout_data_struct
*rawptr
, *oldrawptr
;
422 const bfd_target
*result
;
424 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, sizeof (struct aout_data_struct
));
425 if (rawptr
== NULL
) {
426 bfd_set_error (bfd_error_no_memory
);
430 oldrawptr
= abfd
->tdata
.aout_data
;
431 abfd
->tdata
.aout_data
= rawptr
;
433 /* Copy the contents of the old tdata struct.
434 In particular, we want the subformat, since for hpux it was set in
435 hp300hpux.c:swap_exec_header_in and will be used in
436 hp300hpux.c:callback. */
437 if (oldrawptr
!= NULL
)
438 *abfd
->tdata
.aout_data
= *oldrawptr
;
440 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
441 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
; /* Copy in the internal_exec struct */
442 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
444 /* Set the file flags */
445 abfd
->flags
= NO_FLAGS
;
446 if (execp
->a_drsize
|| execp
->a_trsize
)
447 abfd
->flags
|= HAS_RELOC
;
448 /* Setting of EXEC_P has been deferred to the bottom of this function */
450 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
451 if (N_DYNAMIC(*execp
))
452 abfd
->flags
|= DYNAMIC
;
454 if (N_MAGIC (*execp
) == ZMAGIC
)
456 abfd
->flags
|= D_PAGED
| WP_TEXT
;
457 adata (abfd
).magic
= z_magic
;
459 else if (N_MAGIC (*execp
) == QMAGIC
)
461 abfd
->flags
|= D_PAGED
| WP_TEXT
;
462 adata (abfd
).magic
= z_magic
;
463 adata (abfd
).subformat
= q_magic_format
;
465 else if (N_MAGIC (*execp
) == NMAGIC
)
467 abfd
->flags
|= WP_TEXT
;
468 adata (abfd
).magic
= n_magic
;
470 else if (N_MAGIC (*execp
) == OMAGIC
471 || N_MAGIC (*execp
) == BMAGIC
)
472 adata (abfd
).magic
= o_magic
;
475 /* Should have been checked with N_BADMAG before this routine
480 bfd_get_start_address (abfd
) = execp
->a_entry
;
482 obj_aout_symbols (abfd
) = (aout_symbol_type
*)NULL
;
483 bfd_get_symcount (abfd
) = execp
->a_syms
/ sizeof (struct external_nlist
);
485 /* The default relocation entry size is that of traditional V7 Unix. */
486 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
488 /* The default symbol entry size is that of traditional Unix. */
489 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
491 obj_aout_external_syms (abfd
) = NULL
;
492 obj_aout_external_strings (abfd
) = NULL
;
493 obj_aout_sym_hashes (abfd
) = NULL
;
495 if (! NAME(aout
,make_sections
) (abfd
))
498 obj_datasec (abfd
)->_raw_size
= execp
->a_data
;
499 obj_bsssec (abfd
)->_raw_size
= execp
->a_bss
;
501 obj_textsec (abfd
)->flags
=
502 (execp
->a_trsize
!= 0
503 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
504 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
505 obj_datasec (abfd
)->flags
=
506 (execp
->a_drsize
!= 0
507 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
508 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
509 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
511 #ifdef THIS_IS_ONLY_DOCUMENTATION
512 /* The common code can't fill in these things because they depend
513 on either the start address of the text segment, the rounding
514 up of virtual addresses between segments, or the starting file
515 position of the text segment -- all of which varies among different
516 versions of a.out. */
518 /* Call back to the format-dependent code to fill in the rest of the
519 fields and do any further cleanup. Things that should be filled
520 in by the callback: */
522 struct exec
*execp
= exec_hdr (abfd
);
524 obj_textsec (abfd
)->size
= N_TXTSIZE(*execp
);
525 obj_textsec (abfd
)->raw_size
= N_TXTSIZE(*execp
);
526 /* data and bss are already filled in since they're so standard */
528 /* The virtual memory addresses of the sections */
529 obj_textsec (abfd
)->vma
= N_TXTADDR(*execp
);
530 obj_datasec (abfd
)->vma
= N_DATADDR(*execp
);
531 obj_bsssec (abfd
)->vma
= N_BSSADDR(*execp
);
533 /* The file offsets of the sections */
534 obj_textsec (abfd
)->filepos
= N_TXTOFF(*execp
);
535 obj_datasec (abfd
)->filepos
= N_DATOFF(*execp
);
537 /* The file offsets of the relocation info */
538 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF(*execp
);
539 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF(*execp
);
541 /* The file offsets of the string table and symbol table. */
542 obj_str_filepos (abfd
) = N_STROFF (*execp
);
543 obj_sym_filepos (abfd
) = N_SYMOFF (*execp
);
545 /* Determine the architecture and machine type of the object file. */
546 switch (N_MACHTYPE (*exec_hdr (abfd
))) {
548 abfd
->obj_arch
= bfd_arch_obscure
;
552 adata(abfd
)->page_size
= PAGE_SIZE
;
553 adata(abfd
)->segment_size
= SEGMENT_SIZE
;
554 adata(abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
558 /* The architecture is encoded in various ways in various a.out variants,
559 or is not encoded at all in some of them. The relocation size depends
560 on the architecture and the a.out variant. Finally, the return value
561 is the bfd_target vector in use. If an error occurs, return zero and
562 set bfd_error to the appropriate error code.
564 Formats such as b.out, which have additional fields in the a.out
565 header, should cope with them in this callback as well. */
566 #endif /* DOCUMENTATION */
568 result
= (*callback_to_real_object_p
)(abfd
);
570 /* Now that the segment addresses have been worked out, take a better
571 guess at whether the file is executable. If the entry point
572 is within the text segment, assume it is. (This makes files
573 executable even if their entry point address is 0, as long as
574 their text starts at zero.). */
575 if ((execp
->a_entry
>= obj_textsec(abfd
)->vma
) &&
576 (execp
->a_entry
< obj_textsec(abfd
)->vma
+ obj_textsec(abfd
)->_raw_size
))
577 abfd
->flags
|= EXEC_P
;
581 struct stat stat_buf
;
583 /* The original heuristic doesn't work in some important cases.
584 The a.out file has no information about the text start
585 address. For files (like kernels) linked to non-standard
586 addresses (ld -Ttext nnn) the entry point may not be between
587 the default text start (obj_textsec(abfd)->vma) and
588 (obj_textsec(abfd)->vma) + text size. This is not just a mach
589 issue. Many kernels are loaded at non standard addresses. */
591 && (fstat(fileno((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
592 && ((stat_buf
.st_mode
& 0111) != 0))
593 abfd
->flags
|= EXEC_P
;
595 #endif /* STAT_FOR_EXEC */
599 #if 0 /* These should be set correctly anyways. */
600 abfd
->sections
= obj_textsec (abfd
);
601 obj_textsec (abfd
)->next
= obj_datasec (abfd
);
602 obj_datasec (abfd
)->next
= obj_bsssec (abfd
);
608 abfd
->tdata
.aout_data
= oldrawptr
;
615 aout_@var{size}_mkobject
618 boolean aout_@var{size}_mkobject, (bfd *abfd);
621 Initialize BFD @var{abfd} for use with a.out files.
625 NAME(aout
,mkobject
) (abfd
)
628 struct aout_data_struct
*rawptr
;
630 bfd_set_error (bfd_error_system_call
);
632 /* Use an intermediate variable for clarity */
633 rawptr
= (struct aout_data_struct
*)bfd_zalloc (abfd
, sizeof (struct aout_data_struct
));
635 if (rawptr
== NULL
) {
636 bfd_set_error (bfd_error_no_memory
);
640 abfd
->tdata
.aout_data
= rawptr
;
641 exec_hdr (abfd
) = &(rawptr
->e
);
643 obj_textsec (abfd
) = (asection
*)NULL
;
644 obj_datasec (abfd
) = (asection
*)NULL
;
645 obj_bsssec (abfd
) = (asection
*)NULL
;
653 aout_@var{size}_machine_type
656 enum machine_type aout_@var{size}_machine_type
657 (enum bfd_architecture arch,
658 unsigned long machine));
661 Keep track of machine architecture and machine type for
662 a.out's. Return the <<machine_type>> for a particular
663 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
664 and machine can't be represented in a.out format.
666 If the architecture is understood, machine type 0 (default)
667 is always understood.
671 NAME(aout
,machine_type
) (arch
, machine
, unknown
)
672 enum bfd_architecture arch
;
673 unsigned long machine
;
676 enum machine_type arch_flags
;
678 arch_flags
= M_UNKNOWN
;
684 || machine
== bfd_mach_sparc
685 || machine
== bfd_mach_sparc64
)
686 arch_flags
= M_SPARC
;
691 case 0: arch_flags
= M_68010
; break;
692 case 68000: arch_flags
= M_UNKNOWN
; *unknown
= false; break;
693 case 68010: arch_flags
= M_68010
; break;
694 case 68020: arch_flags
= M_68020
; break;
695 default: arch_flags
= M_UNKNOWN
; break;
700 if (machine
== 0) arch_flags
= M_386
;
704 if (machine
== 0) arch_flags
= M_29K
;
708 if (machine
== 0) arch_flags
= M_ARM
;
715 case 3000: arch_flags
= M_MIPS1
; break;
716 case 4000: /* mips3 */
718 case 8000: /* mips4 */
720 case 6000: arch_flags
= M_MIPS2
; break;
721 default: arch_flags
= M_UNKNOWN
; break;
727 case 0: arch_flags
= M_NS32532
; break;
728 case 32032: arch_flags
= M_NS32032
; break;
729 case 32532: arch_flags
= M_NS32532
; break;
730 default: arch_flags
= M_UNKNOWN
; break;
738 /* start-sanitize-rce */
742 /* end-sanitize-rce */
745 arch_flags
= M_UNKNOWN
;
748 if (arch_flags
!= M_UNKNOWN
)
757 aout_@var{size}_set_arch_mach
760 boolean aout_@var{size}_set_arch_mach,
762 enum bfd_architecture arch,
763 unsigned long machine));
766 Set the architecture and the machine of the BFD @var{abfd} to the
767 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
768 can support the architecture required.
772 NAME(aout
,set_arch_mach
) (abfd
, arch
, machine
)
774 enum bfd_architecture arch
;
775 unsigned long machine
;
777 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
780 if (arch
!= bfd_arch_unknown
)
784 NAME(aout
,machine_type
) (arch
, machine
, &unknown
);
789 /* Determine the size of a relocation entry */
794 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
797 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
801 return (*aout_backend_info(abfd
)->set_sizes
) (abfd
);
805 adjust_o_magic (abfd
, execp
)
807 struct internal_exec
*execp
;
809 file_ptr pos
= adata (abfd
).exec_bytes_size
;
814 obj_textsec(abfd
)->filepos
= pos
;
815 if (!obj_textsec(abfd
)->user_set_vma
)
816 obj_textsec(abfd
)->vma
= vma
;
818 vma
= obj_textsec(abfd
)->vma
;
820 pos
+= obj_textsec(abfd
)->_raw_size
;
821 vma
+= obj_textsec(abfd
)->_raw_size
;
824 if (!obj_datasec(abfd
)->user_set_vma
)
826 #if 0 /* ?? Does alignment in the file image really matter? */
827 pad
= align_power (vma
, obj_datasec(abfd
)->alignment_power
) - vma
;
829 obj_textsec(abfd
)->_raw_size
+= pad
;
832 obj_datasec(abfd
)->vma
= vma
;
835 vma
= obj_datasec(abfd
)->vma
;
836 obj_datasec(abfd
)->filepos
= pos
;
837 pos
+= obj_datasec(abfd
)->_raw_size
;
838 vma
+= obj_datasec(abfd
)->_raw_size
;
841 if (!obj_bsssec(abfd
)->user_set_vma
)
844 pad
= align_power (vma
, obj_bsssec(abfd
)->alignment_power
) - vma
;
846 obj_datasec(abfd
)->_raw_size
+= pad
;
849 obj_bsssec(abfd
)->vma
= vma
;
853 /* The VMA of the .bss section is set by the the VMA of the
854 .data section plus the size of the .data section. We may
855 need to add padding bytes to make this true. */
856 pad
= obj_bsssec (abfd
)->vma
- vma
;
859 obj_datasec (abfd
)->_raw_size
+= pad
;
863 obj_bsssec(abfd
)->filepos
= pos
;
865 /* Fix up the exec header. */
866 execp
->a_text
= obj_textsec(abfd
)->_raw_size
;
867 execp
->a_data
= obj_datasec(abfd
)->_raw_size
;
868 execp
->a_bss
= obj_bsssec(abfd
)->_raw_size
;
869 N_SET_MAGIC (*execp
, OMAGIC
);
873 adjust_z_magic (abfd
, execp
)
875 struct internal_exec
*execp
;
877 bfd_size_type data_pad
, text_pad
;
879 CONST
struct aout_backend_data
*abdp
;
880 int ztih
; /* Nonzero if text includes exec header. */
882 abdp
= aout_backend_info (abfd
);
886 && (abdp
->text_includes_header
887 || obj_aout_subformat (abfd
) == q_magic_format
));
888 obj_textsec(abfd
)->filepos
= (ztih
889 ? adata(abfd
).exec_bytes_size
890 : adata(abfd
).zmagic_disk_block_size
);
891 if (! obj_textsec(abfd
)->user_set_vma
)
893 /* ?? Do we really need to check for relocs here? */
894 obj_textsec(abfd
)->vma
= ((abfd
->flags
& HAS_RELOC
)
897 ? (abdp
->default_text_vma
898 + adata(abfd
).exec_bytes_size
)
899 : abdp
->default_text_vma
));
904 /* The .text section is being loaded at an unusual address. We
905 may need to pad it such that the .data section starts at a page
908 text_pad
= ((obj_textsec (abfd
)->filepos
- obj_textsec (abfd
)->vma
)
909 & (adata (abfd
).page_size
- 1));
911 text_pad
= ((- obj_textsec (abfd
)->vma
)
912 & (adata (abfd
).page_size
- 1));
915 /* Find start of data. */
918 text_end
= obj_textsec (abfd
)->filepos
+ obj_textsec (abfd
)->_raw_size
;
919 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
923 /* Note that if page_size == zmagic_disk_block_size, then
924 filepos == page_size, and this case is the same as the ztih
926 text_end
= obj_textsec (abfd
)->_raw_size
;
927 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
928 text_end
+= obj_textsec (abfd
)->filepos
;
930 obj_textsec(abfd
)->_raw_size
+= text_pad
;
931 text_end
+= text_pad
;
934 if (!obj_datasec(abfd
)->user_set_vma
)
937 vma
= obj_textsec(abfd
)->vma
+ obj_textsec(abfd
)->_raw_size
;
938 obj_datasec(abfd
)->vma
= BFD_ALIGN (vma
, adata(abfd
).segment_size
);
940 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
942 text_pad
= (obj_datasec(abfd
)->vma
943 - obj_textsec(abfd
)->vma
944 - obj_textsec(abfd
)->_raw_size
);
945 obj_textsec(abfd
)->_raw_size
+= text_pad
;
947 obj_datasec(abfd
)->filepos
= (obj_textsec(abfd
)->filepos
948 + obj_textsec(abfd
)->_raw_size
);
950 /* Fix up exec header while we're at it. */
951 execp
->a_text
= obj_textsec(abfd
)->_raw_size
;
952 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
953 execp
->a_text
+= adata(abfd
).exec_bytes_size
;
954 if (obj_aout_subformat (abfd
) == q_magic_format
)
955 N_SET_MAGIC (*execp
, QMAGIC
);
957 N_SET_MAGIC (*execp
, ZMAGIC
);
959 /* Spec says data section should be rounded up to page boundary. */
960 obj_datasec(abfd
)->_raw_size
961 = align_power (obj_datasec(abfd
)->_raw_size
,
962 obj_bsssec(abfd
)->alignment_power
);
963 execp
->a_data
= BFD_ALIGN (obj_datasec(abfd
)->_raw_size
,
964 adata(abfd
).page_size
);
965 data_pad
= execp
->a_data
- obj_datasec(abfd
)->_raw_size
;
968 if (!obj_bsssec(abfd
)->user_set_vma
)
969 obj_bsssec(abfd
)->vma
= (obj_datasec(abfd
)->vma
970 + obj_datasec(abfd
)->_raw_size
);
971 /* If the BSS immediately follows the data section and extra space
972 in the page is left after the data section, fudge data
973 in the header so that the bss section looks smaller by that
974 amount. We'll start the bss section there, and lie to the OS.
975 (Note that a linker script, as well as the above assignment,
976 could have explicitly set the BSS vma to immediately follow
977 the data section.) */
978 if (align_power (obj_bsssec(abfd
)->vma
, obj_bsssec(abfd
)->alignment_power
)
979 == obj_datasec(abfd
)->vma
+ obj_datasec(abfd
)->_raw_size
)
980 execp
->a_bss
= (data_pad
> obj_bsssec(abfd
)->_raw_size
) ? 0 :
981 obj_bsssec(abfd
)->_raw_size
- data_pad
;
983 execp
->a_bss
= obj_bsssec(abfd
)->_raw_size
;
987 adjust_n_magic (abfd
, execp
)
989 struct internal_exec
*execp
;
991 file_ptr pos
= adata(abfd
).exec_bytes_size
;
996 obj_textsec(abfd
)->filepos
= pos
;
997 if (!obj_textsec(abfd
)->user_set_vma
)
998 obj_textsec(abfd
)->vma
= vma
;
1000 vma
= obj_textsec(abfd
)->vma
;
1001 pos
+= obj_textsec(abfd
)->_raw_size
;
1002 vma
+= obj_textsec(abfd
)->_raw_size
;
1005 obj_datasec(abfd
)->filepos
= pos
;
1006 if (!obj_datasec(abfd
)->user_set_vma
)
1007 obj_datasec(abfd
)->vma
= BFD_ALIGN (vma
, adata(abfd
).segment_size
);
1008 vma
= obj_datasec(abfd
)->vma
;
1010 /* Since BSS follows data immediately, see if it needs alignment. */
1011 vma
+= obj_datasec(abfd
)->_raw_size
;
1012 pad
= align_power (vma
, obj_bsssec(abfd
)->alignment_power
) - vma
;
1013 obj_datasec(abfd
)->_raw_size
+= pad
;
1014 pos
+= obj_datasec(abfd
)->_raw_size
;
1017 if (!obj_bsssec(abfd
)->user_set_vma
)
1018 obj_bsssec(abfd
)->vma
= vma
;
1020 vma
= obj_bsssec(abfd
)->vma
;
1022 /* Fix up exec header. */
1023 execp
->a_text
= obj_textsec(abfd
)->_raw_size
;
1024 execp
->a_data
= obj_datasec(abfd
)->_raw_size
;
1025 execp
->a_bss
= obj_bsssec(abfd
)->_raw_size
;
1026 N_SET_MAGIC (*execp
, NMAGIC
);
1030 NAME(aout
,adjust_sizes_and_vmas
) (abfd
, text_size
, text_end
)
1032 bfd_size_type
*text_size
;
1035 struct internal_exec
*execp
= exec_hdr (abfd
);
1037 if (! NAME(aout
,make_sections
) (abfd
))
1040 if (adata(abfd
).magic
!= undecided_magic
)
1043 obj_textsec(abfd
)->_raw_size
=
1044 align_power(obj_textsec(abfd
)->_raw_size
,
1045 obj_textsec(abfd
)->alignment_power
);
1047 *text_size
= obj_textsec (abfd
)->_raw_size
;
1048 /* Rule (heuristic) for when to pad to a new page. Note that there
1049 are (at least) two ways demand-paged (ZMAGIC) files have been
1050 handled. Most Berkeley-based systems start the text segment at
1051 (PAGE_SIZE). However, newer versions of SUNOS start the text
1052 segment right after the exec header; the latter is counted in the
1053 text segment size, and is paged in by the kernel with the rest of
1056 /* This perhaps isn't the right way to do this, but made it simpler for me
1057 to understand enough to implement it. Better would probably be to go
1058 right from BFD flags to alignment/positioning characteristics. But the
1059 old code was sloppy enough about handling the flags, and had enough
1060 other magic, that it was a little hard for me to understand. I think
1061 I understand it better now, but I haven't time to do the cleanup this
1064 if (abfd
->flags
& D_PAGED
)
1065 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1066 adata(abfd
).magic
= z_magic
;
1067 else if (abfd
->flags
& WP_TEXT
)
1068 adata(abfd
).magic
= n_magic
;
1070 adata(abfd
).magic
= o_magic
;
1072 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1074 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1076 switch (adata(abfd
).magic
) {
1077 case n_magic
: str
= "NMAGIC"; break;
1078 case o_magic
: str
= "OMAGIC"; break;
1079 case z_magic
: str
= "ZMAGIC"; break;
1084 obj_textsec(abfd
)->vma
, obj_textsec(abfd
)->_raw_size
,
1085 obj_textsec(abfd
)->alignment_power
,
1086 obj_datasec(abfd
)->vma
, obj_datasec(abfd
)->_raw_size
,
1087 obj_datasec(abfd
)->alignment_power
,
1088 obj_bsssec(abfd
)->vma
, obj_bsssec(abfd
)->_raw_size
,
1089 obj_bsssec(abfd
)->alignment_power
);
1093 switch (adata(abfd
).magic
)
1096 adjust_o_magic (abfd
, execp
);
1099 adjust_z_magic (abfd
, execp
);
1102 adjust_n_magic (abfd
, execp
);
1108 #ifdef BFD_AOUT_DEBUG
1109 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1110 obj_textsec(abfd
)->vma
, obj_textsec(abfd
)->_raw_size
,
1111 obj_textsec(abfd
)->filepos
,
1112 obj_datasec(abfd
)->vma
, obj_datasec(abfd
)->_raw_size
,
1113 obj_datasec(abfd
)->filepos
,
1114 obj_bsssec(abfd
)->vma
, obj_bsssec(abfd
)->_raw_size
);
1122 aout_@var{size}_new_section_hook
1125 boolean aout_@var{size}_new_section_hook,
1127 asection *newsect));
1130 Called by the BFD in response to a @code{bfd_make_section}
1134 NAME(aout
,new_section_hook
) (abfd
, newsect
)
1138 /* align to double at least */
1139 newsect
->alignment_power
= bfd_get_arch_info(abfd
)->section_align_power
;
1142 if (bfd_get_format (abfd
) == bfd_object
)
1144 if (obj_textsec(abfd
) == NULL
&& !strcmp(newsect
->name
, ".text")) {
1145 obj_textsec(abfd
)= newsect
;
1146 newsect
->target_index
= N_TEXT
;
1150 if (obj_datasec(abfd
) == NULL
&& !strcmp(newsect
->name
, ".data")) {
1151 obj_datasec(abfd
) = newsect
;
1152 newsect
->target_index
= N_DATA
;
1156 if (obj_bsssec(abfd
) == NULL
&& !strcmp(newsect
->name
, ".bss")) {
1157 obj_bsssec(abfd
) = newsect
;
1158 newsect
->target_index
= N_BSS
;
1164 /* We allow more than three sections internally */
1169 NAME(aout
,set_section_contents
) (abfd
, section
, location
, offset
, count
)
1174 bfd_size_type count
;
1177 bfd_size_type text_size
;
1179 if (! abfd
->output_has_begun
)
1181 if (! NAME(aout
,adjust_sizes_and_vmas
) (abfd
, &text_size
, &text_end
))
1185 if (section
== obj_bsssec (abfd
))
1187 bfd_set_error (bfd_error_no_contents
);
1191 if (section
!= obj_textsec (abfd
)
1192 && section
!= obj_datasec (abfd
))
1194 bfd_set_error (bfd_error_nonrepresentable_section
);
1200 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1201 || bfd_write (location
, 1, count
, abfd
) != count
)
1208 /* Read the external symbols from an a.out file. */
1211 aout_get_external_symbols (abfd
)
1214 if (obj_aout_external_syms (abfd
) == (struct external_nlist
*) NULL
)
1216 bfd_size_type count
;
1217 struct external_nlist
*syms
;
1219 count
= exec_hdr (abfd
)->a_syms
/ EXTERNAL_NLIST_SIZE
;
1221 /* We allocate using malloc to make the values easy to free
1222 later on. If we put them on the obstack it might not be
1223 possible to free them. */
1224 syms
= ((struct external_nlist
*)
1225 malloc ((size_t) count
* EXTERNAL_NLIST_SIZE
));
1226 if (syms
== (struct external_nlist
*) NULL
&& count
!= 0)
1228 bfd_set_error (bfd_error_no_memory
);
1232 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1233 || (bfd_read (syms
, 1, exec_hdr (abfd
)->a_syms
, abfd
)
1234 != exec_hdr (abfd
)->a_syms
))
1240 obj_aout_external_syms (abfd
) = syms
;
1241 obj_aout_external_sym_count (abfd
) = count
;
1244 if (obj_aout_external_strings (abfd
) == NULL
1245 && exec_hdr (abfd
)->a_syms
!= 0)
1247 unsigned char string_chars
[BYTES_IN_WORD
];
1248 bfd_size_type stringsize
;
1251 /* Get the size of the strings. */
1252 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1253 || (bfd_read ((PTR
) string_chars
, BYTES_IN_WORD
, 1, abfd
)
1256 stringsize
= GET_WORD (abfd
, string_chars
);
1258 strings
= (char *) malloc ((size_t) stringsize
+ 1);
1259 if (strings
== NULL
)
1261 bfd_set_error (bfd_error_no_memory
);
1265 /* Skip space for the string count in the buffer for convenience
1266 when using indexes. */
1267 if (bfd_read (strings
+ BYTES_IN_WORD
, 1, stringsize
- BYTES_IN_WORD
,
1269 != stringsize
- BYTES_IN_WORD
)
1275 /* Ensure that a zero index yields an empty string. */
1278 /* Sanity preservation. */
1279 strings
[stringsize
] = '\0';
1281 obj_aout_external_strings (abfd
) = strings
;
1282 obj_aout_external_string_size (abfd
) = stringsize
;
1288 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1289 and symbol->value fields of CACHE_PTR will be set from the a.out
1290 nlist structure. This function is responsible for setting
1291 symbol->flags and symbol->section, and adjusting symbol->value. */
1294 translate_from_native_sym_flags (abfd
, cache_ptr
)
1296 aout_symbol_type
*cache_ptr
;
1300 if ((cache_ptr
->type
& N_STAB
) != 0
1301 || cache_ptr
->type
== N_FN
)
1305 /* This is a debugging symbol. */
1307 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1309 /* Work out the symbol section. */
1310 switch (cache_ptr
->type
& N_TYPE
)
1314 sec
= obj_textsec (abfd
);
1317 sec
= obj_datasec (abfd
);
1320 sec
= obj_bsssec (abfd
);
1324 sec
= bfd_abs_section_ptr
;
1328 cache_ptr
->symbol
.section
= sec
;
1329 cache_ptr
->symbol
.value
-= sec
->vma
;
1334 /* Get the default visibility. This does not apply to all types, so
1335 we just hold it in a local variable to use if wanted. */
1336 if ((cache_ptr
->type
& N_EXT
) == 0)
1337 visible
= BSF_LOCAL
;
1339 visible
= BSF_GLOBAL
;
1341 switch (cache_ptr
->type
)
1344 case N_ABS
: case N_ABS
| N_EXT
:
1345 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1346 cache_ptr
->symbol
.flags
= visible
;
1349 case N_UNDF
| N_EXT
:
1350 if (cache_ptr
->symbol
.value
!= 0)
1352 /* This is a common symbol. */
1353 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1354 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1358 cache_ptr
->symbol
.flags
= 0;
1359 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1363 case N_TEXT
: case N_TEXT
| N_EXT
:
1364 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1365 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1366 cache_ptr
->symbol
.flags
= visible
;
1369 /* N_SETV symbols used to represent set vectors placed in the
1370 data section. They are no longer generated. Theoretically,
1371 it was possible to extract the entries and combine them with
1372 new ones, although I don't know if that was ever actually
1373 done. Unless that feature is restored, treat them as data
1375 case N_SETV
: case N_SETV
| N_EXT
:
1376 case N_DATA
: case N_DATA
| N_EXT
:
1377 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1378 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1379 cache_ptr
->symbol
.flags
= visible
;
1382 case N_BSS
: case N_BSS
| N_EXT
:
1383 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1384 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1385 cache_ptr
->symbol
.flags
= visible
;
1388 case N_SETA
: case N_SETA
| N_EXT
:
1389 case N_SETT
: case N_SETT
| N_EXT
:
1390 case N_SETD
: case N_SETD
| N_EXT
:
1391 case N_SETB
: case N_SETB
| N_EXT
:
1394 arelent_chain
*reloc
;
1395 asection
*into_section
;
1397 /* This is a set symbol. The name of the symbol is the name
1398 of the set (e.g., __CTOR_LIST__). The value of the symbol
1399 is the value to add to the set. We create a section with
1400 the same name as the symbol, and add a reloc to insert the
1401 appropriate value into the section.
1403 This action is actually obsolete; it used to make the
1404 linker do the right thing, but the linker no longer uses
1407 section
= bfd_get_section_by_name (abfd
, cache_ptr
->symbol
.name
);
1408 if (section
== NULL
)
1412 copy
= bfd_alloc (abfd
, strlen (cache_ptr
->symbol
.name
) + 1);
1415 bfd_set_error (bfd_error_no_memory
);
1419 strcpy (copy
, cache_ptr
->symbol
.name
);
1420 section
= bfd_make_section (abfd
, copy
);
1421 if (section
== NULL
)
1425 reloc
= (arelent_chain
*) bfd_alloc (abfd
, sizeof (arelent_chain
));
1428 bfd_set_error (bfd_error_no_memory
);
1432 /* Build a relocation entry for the constructor. */
1433 switch (cache_ptr
->type
& N_TYPE
)
1436 into_section
= bfd_abs_section_ptr
;
1437 cache_ptr
->type
= N_ABS
;
1440 into_section
= obj_textsec (abfd
);
1441 cache_ptr
->type
= N_TEXT
;
1444 into_section
= obj_datasec (abfd
);
1445 cache_ptr
->type
= N_DATA
;
1448 into_section
= obj_bsssec (abfd
);
1449 cache_ptr
->type
= N_BSS
;
1453 /* Build a relocation pointing into the constructor section
1454 pointing at the symbol in the set vector specified. */
1455 reloc
->relent
.addend
= cache_ptr
->symbol
.value
;
1456 cache_ptr
->symbol
.section
= into_section
;
1457 reloc
->relent
.sym_ptr_ptr
= into_section
->symbol_ptr_ptr
;
1459 /* We modify the symbol to belong to a section depending upon
1460 the name of the symbol, and add to the size of the section
1461 to contain a pointer to the symbol. Build a reloc entry to
1462 relocate to this symbol attached to this section. */
1463 section
->flags
= SEC_CONSTRUCTOR
| SEC_RELOC
;
1465 section
->reloc_count
++;
1466 section
->alignment_power
= 2;
1468 reloc
->next
= section
->constructor_chain
;
1469 section
->constructor_chain
= reloc
;
1470 reloc
->relent
.address
= section
->_raw_size
;
1471 section
->_raw_size
+= BYTES_IN_WORD
;
1473 reloc
->relent
.howto
= CTOR_TABLE_RELOC_HOWTO(abfd
);
1475 cache_ptr
->symbol
.flags
|= BSF_CONSTRUCTOR
;
1480 /* This symbol is the text of a warning message. The next
1481 symbol is the symbol to associate the warning with. If a
1482 reference is made to that symbol, a warning is issued. */
1483 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_WARNING
;
1485 /* @@ Stuffing pointers into integers is a no-no. We can
1486 usually get away with it if the integer is large enough
1488 if (sizeof (cache_ptr
+ 1) > sizeof (bfd_vma
))
1490 cache_ptr
->symbol
.value
= (bfd_vma
) (cache_ptr
+ 1);
1492 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1496 case N_INDR
: case N_INDR
| N_EXT
:
1497 /* An indirect symbol. This consists of two symbols in a row.
1498 The first symbol is the name of the indirection. The second
1499 symbol is the name of the target. A reference to the first
1500 symbol becomes a reference to the second. */
1501 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_INDIRECT
| visible
;
1503 /* @@ Stuffing pointers into integers is a no-no. We can
1504 usually get away with it if the integer is large enough
1506 if (sizeof (cache_ptr
+ 1) > sizeof (bfd_vma
))
1508 cache_ptr
->symbol
.value
= (bfd_vma
) (cache_ptr
+ 1);
1510 cache_ptr
->symbol
.section
= bfd_ind_section_ptr
;
1515 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1516 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1520 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1521 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1525 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1526 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1527 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1531 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1532 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1533 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1537 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1538 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1539 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1546 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1549 translate_to_native_sym_flags (abfd
, cache_ptr
, sym_pointer
)
1552 struct external_nlist
*sym_pointer
;
1554 bfd_vma value
= cache_ptr
->value
;
1558 /* Mask out any existing type bits in case copying from one section
1560 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1562 sec
= bfd_get_section (cache_ptr
);
1567 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1569 bfd_set_error (bfd_error_nonrepresentable_section
);
1573 if (sec
->output_section
!= NULL
)
1575 off
= sec
->output_offset
;
1576 sec
= sec
->output_section
;
1579 if (bfd_is_abs_section (sec
))
1580 sym_pointer
->e_type
[0] |= N_ABS
;
1581 else if (sec
== obj_textsec (abfd
))
1582 sym_pointer
->e_type
[0] |= N_TEXT
;
1583 else if (sec
== obj_datasec (abfd
))
1584 sym_pointer
->e_type
[0] |= N_DATA
;
1585 else if (sec
== obj_bsssec (abfd
))
1586 sym_pointer
->e_type
[0] |= N_BSS
;
1587 else if (bfd_is_und_section (sec
))
1588 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1589 else if (bfd_is_ind_section (sec
))
1590 sym_pointer
->e_type
[0] = N_INDR
;
1591 else if (bfd_is_com_section (sec
))
1592 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1595 bfd_set_error (bfd_error_nonrepresentable_section
);
1599 /* Turn the symbol from section relative to absolute again */
1600 value
+= sec
->vma
+ off
;
1602 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1603 sym_pointer
->e_type
[0] = N_WARNING
;
1605 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1606 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1607 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1608 sym_pointer
->e_type
[0] |= N_EXT
;
1610 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1612 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1615 case N_ABS
: type
= N_SETA
; break;
1616 case N_TEXT
: type
= N_SETT
; break;
1617 case N_DATA
: type
= N_SETD
; break;
1618 case N_BSS
: type
= N_SETB
; break;
1620 sym_pointer
->e_type
[0] = type
;
1623 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1627 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1630 case N_ABS
: type
= N_WEAKA
; break;
1631 case N_TEXT
: type
= N_WEAKT
; break;
1632 case N_DATA
: type
= N_WEAKD
; break;
1633 case N_BSS
: type
= N_WEAKB
; break;
1634 case N_UNDF
: type
= N_WEAKU
; break;
1636 sym_pointer
->e_type
[0] = type
;
1639 PUT_WORD(abfd
, value
, sym_pointer
->e_value
);
1644 /* Native-level interface to symbols. */
1647 NAME(aout
,make_empty_symbol
) (abfd
)
1650 aout_symbol_type
*new =
1651 (aout_symbol_type
*)bfd_zalloc (abfd
, sizeof (aout_symbol_type
));
1654 bfd_set_error (bfd_error_no_memory
);
1657 new->symbol
.the_bfd
= abfd
;
1659 return &new->symbol
;
1662 /* Translate a set of internal symbols into external symbols. */
1665 NAME(aout
,translate_symbol_table
) (abfd
, in
, ext
, count
, str
, strsize
, dynamic
)
1667 aout_symbol_type
*in
;
1668 struct external_nlist
*ext
;
1669 bfd_size_type count
;
1671 bfd_size_type strsize
;
1674 struct external_nlist
*ext_end
;
1676 ext_end
= ext
+ count
;
1677 for (; ext
< ext_end
; ext
++, in
++)
1681 x
= GET_WORD (abfd
, ext
->e_strx
);
1682 in
->symbol
.the_bfd
= abfd
;
1684 /* For the normal symbols, the zero index points at the number
1685 of bytes in the string table but is to be interpreted as the
1686 null string. For the dynamic symbols, the number of bytes in
1687 the string table is stored in the __DYNAMIC structure and the
1688 zero index points at an actual string. */
1689 if (x
== 0 && ! dynamic
)
1690 in
->symbol
.name
= "";
1691 else if (x
< strsize
)
1692 in
->symbol
.name
= str
+ x
;
1696 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1697 in
->desc
= bfd_h_get_16 (abfd
, ext
->e_desc
);
1698 in
->other
= bfd_h_get_8 (abfd
, ext
->e_other
);
1699 in
->type
= bfd_h_get_8 (abfd
, ext
->e_type
);
1700 in
->symbol
.udata
.p
= NULL
;
1702 if (! translate_from_native_sym_flags (abfd
, in
))
1706 in
->symbol
.flags
|= BSF_DYNAMIC
;
1712 /* We read the symbols into a buffer, which is discarded when this
1713 function exits. We read the strings into a buffer large enough to
1714 hold them all plus all the cached symbol entries. */
1717 NAME(aout
,slurp_symbol_table
) (abfd
)
1720 struct external_nlist
*old_external_syms
;
1721 aout_symbol_type
*cached
;
1724 /* If there's no work to be done, don't do any */
1725 if (obj_aout_symbols (abfd
) != (aout_symbol_type
*) NULL
)
1728 old_external_syms
= obj_aout_external_syms (abfd
);
1730 if (! aout_get_external_symbols (abfd
))
1733 cached_size
= (obj_aout_external_sym_count (abfd
)
1734 * sizeof (aout_symbol_type
));
1735 cached
= (aout_symbol_type
*) malloc (cached_size
);
1736 if (cached
== NULL
&& cached_size
!= 0)
1738 bfd_set_error (bfd_error_no_memory
);
1741 if (cached_size
!= 0)
1742 memset (cached
, 0, cached_size
);
1744 /* Convert from external symbol information to internal. */
1745 if (! (NAME(aout
,translate_symbol_table
)
1747 obj_aout_external_syms (abfd
),
1748 obj_aout_external_sym_count (abfd
),
1749 obj_aout_external_strings (abfd
),
1750 obj_aout_external_string_size (abfd
),
1757 bfd_get_symcount (abfd
) = obj_aout_external_sym_count (abfd
);
1759 obj_aout_symbols (abfd
) = cached
;
1761 /* It is very likely that anybody who calls this function will not
1762 want the external symbol information, so if it was allocated
1763 because of our call to aout_get_external_symbols, we free it up
1764 right away to save space. */
1765 if (old_external_syms
== (struct external_nlist
*) NULL
1766 && obj_aout_external_syms (abfd
) != (struct external_nlist
*) NULL
)
1768 free (obj_aout_external_syms (abfd
));
1769 obj_aout_external_syms (abfd
) = NULL
;
1775 /* We use a hash table when writing out symbols so that we only write
1776 out a particular string once. This helps particularly when the
1777 linker writes out stabs debugging entries, because each different
1778 contributing object file tends to have many duplicate stabs
1781 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1782 if BFD_TRADITIONAL_FORMAT is set. */
1784 static bfd_size_type add_to_stringtab
1785 PARAMS ((bfd
*, struct bfd_strtab_hash
*, const char *, boolean
));
1786 static boolean emit_stringtab
PARAMS ((bfd
*, struct bfd_strtab_hash
*));
1788 /* Get the index of a string in a strtab, adding it if it is not
1791 static INLINE bfd_size_type
1792 add_to_stringtab (abfd
, tab
, str
, copy
)
1794 struct bfd_strtab_hash
*tab
;
1799 bfd_size_type index
;
1801 /* An index of 0 always means the empty string. */
1802 if (str
== 0 || *str
== '\0')
1805 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1806 doesn't understand a hashed string table. */
1808 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1811 index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1813 if (index
!= (bfd_size_type
) -1)
1815 /* Add BYTES_IN_WORD to the return value to account for the
1816 space taken up by the string table size. */
1817 index
+= BYTES_IN_WORD
;
1823 /* Write out a strtab. ABFD is already at the right location in the
1827 emit_stringtab (abfd
, tab
)
1829 struct bfd_strtab_hash
*tab
;
1831 bfd_byte buffer
[BYTES_IN_WORD
];
1833 /* The string table starts with the size. */
1834 PUT_WORD (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_WORD
, buffer
);
1835 if (bfd_write ((PTR
) buffer
, 1, BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
1838 return _bfd_stringtab_emit (abfd
, tab
);
1842 NAME(aout
,write_syms
) (abfd
)
1845 unsigned int count
;
1846 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1847 struct bfd_strtab_hash
*strtab
;
1849 strtab
= _bfd_stringtab_init ();
1853 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1855 asymbol
*g
= generic
[count
];
1857 struct external_nlist nsp
;
1859 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, false);
1860 if (indx
== (bfd_size_type
) -1)
1862 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1864 if (bfd_asymbol_flavour(g
) == abfd
->xvec
->flavour
)
1866 bfd_h_put_16(abfd
, aout_symbol(g
)->desc
, nsp
.e_desc
);
1867 bfd_h_put_8(abfd
, aout_symbol(g
)->other
, nsp
.e_other
);
1868 bfd_h_put_8(abfd
, aout_symbol(g
)->type
, nsp
.e_type
);
1872 bfd_h_put_16(abfd
,0, nsp
.e_desc
);
1873 bfd_h_put_8(abfd
, 0, nsp
.e_other
);
1874 bfd_h_put_8(abfd
, 0, nsp
.e_type
);
1877 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1880 if (bfd_write((PTR
)&nsp
,1,EXTERNAL_NLIST_SIZE
, abfd
)
1881 != EXTERNAL_NLIST_SIZE
)
1884 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1885 here, at the end. */
1889 if (! emit_stringtab (abfd
, strtab
))
1892 _bfd_stringtab_free (strtab
);
1897 _bfd_stringtab_free (strtab
);
1903 NAME(aout
,get_symtab
) (abfd
, location
)
1907 unsigned int counter
= 0;
1908 aout_symbol_type
*symbase
;
1910 if (!NAME(aout
,slurp_symbol_table
)(abfd
))
1913 for (symbase
= obj_aout_symbols(abfd
); counter
++ < bfd_get_symcount (abfd
);)
1914 *(location
++) = (asymbol
*)( symbase
++);
1916 return bfd_get_symcount (abfd
);
1920 /* Standard reloc stuff */
1921 /* Output standard relocation information to a file in target byte order. */
1924 NAME(aout
,swap_std_reloc_out
) (abfd
, g
, natptr
)
1927 struct reloc_std_external
*natptr
;
1930 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1932 unsigned int r_length
;
1934 int r_baserel
, r_jmptable
, r_relative
;
1935 asection
*output_section
= sym
->section
->output_section
;
1937 PUT_WORD(abfd
, g
->address
, natptr
->r_address
);
1939 r_length
= g
->howto
->size
; /* Size as a power of two */
1940 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1941 /* XXX This relies on relocs coming from a.out files. */
1942 r_baserel
= (g
->howto
->type
& 8) != 0;
1943 r_jmptable
= (g
->howto
->type
& 16) != 0;
1944 r_relative
= (g
->howto
->type
& 32) != 0;
1947 /* For a standard reloc, the addend is in the object file. */
1948 r_addend
= g
->addend
+ (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
1951 /* name was clobbered by aout_write_syms to be symbol index */
1953 /* If this relocation is relative to a symbol then set the
1954 r_index to the symbols index, and the r_extern bit.
1956 Absolute symbols can come in in two ways, either as an offset
1957 from the abs section, or as a symbol which has an abs value.
1962 if (bfd_is_com_section (output_section
)
1963 || bfd_is_abs_section (output_section
)
1964 || bfd_is_und_section (output_section
))
1966 if (bfd_abs_section_ptr
->symbol
== sym
)
1968 /* Whoops, looked like an abs symbol, but is really an offset
1969 from the abs section */
1975 /* Fill in symbol */
1977 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
1983 /* Just an ordinary section */
1985 r_index
= output_section
->target_index
;
1988 /* now the fun stuff */
1989 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
1990 natptr
->r_index
[0] = r_index
>> 16;
1991 natptr
->r_index
[1] = r_index
>> 8;
1992 natptr
->r_index
[2] = r_index
;
1994 (r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
1995 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
1996 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
1997 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
1998 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
1999 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
);
2001 natptr
->r_index
[2] = r_index
>> 16;
2002 natptr
->r_index
[1] = r_index
>> 8;
2003 natptr
->r_index
[0] = r_index
;
2005 (r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2006 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2007 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2008 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2009 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2010 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2015 /* Extended stuff */
2016 /* Output extended relocation information to a file in target byte order. */
2019 NAME(aout
,swap_ext_reloc_out
) (abfd
, g
, natptr
)
2022 register struct reloc_ext_external
*natptr
;
2026 unsigned int r_type
;
2027 unsigned int r_addend
;
2028 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2029 asection
*output_section
= sym
->section
->output_section
;
2031 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2033 r_type
= (unsigned int) g
->howto
->type
;
2035 r_addend
= g
->addend
;
2036 if ((sym
->flags
& BSF_SECTION_SYM
) != 0)
2037 r_addend
+= (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2039 /* If this relocation is relative to a symbol then set the
2040 r_index to the symbols index, and the r_extern bit.
2042 Absolute symbols can come in in two ways, either as an offset
2043 from the abs section, or as a symbol which has an abs value.
2044 check for that here. */
2046 if (bfd_is_abs_section (bfd_get_section (sym
)))
2051 else if ((sym
->flags
& BSF_SECTION_SYM
) == 0)
2054 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
2058 /* Just an ordinary section */
2060 r_index
= output_section
->target_index
;
2063 /* now the fun stuff */
2064 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2065 natptr
->r_index
[0] = r_index
>> 16;
2066 natptr
->r_index
[1] = r_index
>> 8;
2067 natptr
->r_index
[2] = r_index
;
2069 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2070 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2072 natptr
->r_index
[2] = r_index
>> 16;
2073 natptr
->r_index
[1] = r_index
>> 8;
2074 natptr
->r_index
[0] = r_index
;
2076 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2077 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2080 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2083 /* BFD deals internally with all things based from the section they're
2084 in. so, something in 10 bytes into a text section with a base of
2085 50 would have a symbol (.text+10) and know .text vma was 50.
2087 Aout keeps all it's symbols based from zero, so the symbol would
2088 contain 60. This macro subs the base of each section from the value
2089 to give the true offset from the section */
2092 #define MOVE_ADDRESS(ad) \
2094 /* undefined symbol */ \
2095 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2096 cache_ptr->addend = ad; \
2098 /* defined, section relative. replace symbol with pointer to \
2099 symbol which points to section */ \
2100 switch (r_index) { \
2102 case N_TEXT | N_EXT: \
2103 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2104 cache_ptr->addend = ad - su->textsec->vma; \
2107 case N_DATA | N_EXT: \
2108 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2109 cache_ptr->addend = ad - su->datasec->vma; \
2112 case N_BSS | N_EXT: \
2113 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2114 cache_ptr->addend = ad - su->bsssec->vma; \
2118 case N_ABS | N_EXT: \
2119 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2120 cache_ptr->addend = ad; \
2126 NAME(aout
,swap_ext_reloc_in
) (abfd
, bytes
, cache_ptr
, symbols
, symcount
)
2128 struct reloc_ext_external
*bytes
;
2131 bfd_size_type symcount
;
2133 unsigned int r_index
;
2135 unsigned int r_type
;
2136 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2138 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2140 /* now the fun stuff */
2141 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2142 r_index
= (bytes
->r_index
[0] << 16)
2143 | (bytes
->r_index
[1] << 8)
2144 | bytes
->r_index
[2];
2145 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2146 r_type
= (bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2147 >> RELOC_EXT_BITS_TYPE_SH_BIG
;
2149 r_index
= (bytes
->r_index
[2] << 16)
2150 | (bytes
->r_index
[1] << 8)
2151 | bytes
->r_index
[0];
2152 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2153 r_type
= (bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2154 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
;
2157 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2159 /* Base relative relocs are always against the symbol table,
2160 regardless of the setting of r_extern. r_extern just reflects
2161 whether the symbol the reloc is against is local or global. */
2162 if (r_type
== RELOC_BASE10
2163 || r_type
== RELOC_BASE13
2164 || r_type
== RELOC_BASE22
)
2167 if (r_extern
&& r_index
> symcount
)
2169 /* We could arrange to return an error, but it might be useful
2170 to see the file even if it is bad. */
2175 MOVE_ADDRESS(GET_SWORD(abfd
, bytes
->r_addend
));
2179 NAME(aout
,swap_std_reloc_in
) (abfd
, bytes
, cache_ptr
, symbols
, symcount
)
2181 struct reloc_std_external
*bytes
;
2184 bfd_size_type symcount
;
2186 unsigned int r_index
;
2188 unsigned int r_length
;
2190 int r_baserel
, r_jmptable
, r_relative
;
2191 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2192 unsigned int howto_idx
;
2194 cache_ptr
->address
= bfd_h_get_32 (abfd
, bytes
->r_address
);
2196 /* now the fun stuff */
2197 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2198 r_index
= (bytes
->r_index
[0] << 16)
2199 | (bytes
->r_index
[1] << 8)
2200 | bytes
->r_index
[2];
2201 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2202 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2203 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2204 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2205 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2206 r_length
= (bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2207 >> RELOC_STD_BITS_LENGTH_SH_BIG
;
2209 r_index
= (bytes
->r_index
[2] << 16)
2210 | (bytes
->r_index
[1] << 8)
2211 | bytes
->r_index
[0];
2212 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2213 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2214 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2215 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2216 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2217 r_length
= (bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2218 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
;
2221 howto_idx
= r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2222 + 16 * r_jmptable
+ 32 * r_relative
;
2223 BFD_ASSERT (howto_idx
< TABLE_SIZE (howto_table_std
));
2224 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2225 BFD_ASSERT (cache_ptr
->howto
->type
!= (unsigned int) -1);
2227 /* Base relative relocs are always against the symbol table,
2228 regardless of the setting of r_extern. r_extern just reflects
2229 whether the symbol the reloc is against is local or global. */
2233 if (r_extern
&& r_index
> symcount
)
2235 /* We could arrange to return an error, but it might be useful
2236 to see the file even if it is bad. */
2244 /* Read and swap the relocs for a section. */
2247 NAME(aout
,slurp_reloc_table
) (abfd
, asect
, symbols
)
2253 bfd_size_type reloc_size
;
2255 arelent
*reloc_cache
;
2257 unsigned int counter
= 0;
2260 if (asect
->relocation
)
2263 if (asect
->flags
& SEC_CONSTRUCTOR
)
2266 if (asect
== obj_datasec (abfd
))
2267 reloc_size
= exec_hdr(abfd
)->a_drsize
;
2268 else if (asect
== obj_textsec (abfd
))
2269 reloc_size
= exec_hdr(abfd
)->a_trsize
;
2270 else if (asect
== obj_bsssec (abfd
))
2274 bfd_set_error (bfd_error_invalid_operation
);
2278 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2281 each_size
= obj_reloc_entry_size (abfd
);
2283 count
= reloc_size
/ each_size
;
2285 reloc_cache
= (arelent
*) malloc ((size_t) (count
* sizeof (arelent
)));
2286 if (reloc_cache
== NULL
&& count
!= 0)
2288 bfd_set_error (bfd_error_no_memory
);
2291 memset (reloc_cache
, 0, count
* sizeof (arelent
));
2293 relocs
= malloc ((size_t) reloc_size
);
2294 if (relocs
== NULL
&& reloc_size
!= 0)
2297 bfd_set_error (bfd_error_no_memory
);
2301 if (bfd_read (relocs
, 1, reloc_size
, abfd
) != reloc_size
)
2308 cache_ptr
= reloc_cache
;
2309 if (each_size
== RELOC_EXT_SIZE
)
2311 register struct reloc_ext_external
*rptr
=
2312 (struct reloc_ext_external
*) relocs
;
2314 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2315 NAME(aout
,swap_ext_reloc_in
) (abfd
, rptr
, cache_ptr
, symbols
,
2316 bfd_get_symcount (abfd
));
2320 register struct reloc_std_external
*rptr
=
2321 (struct reloc_std_external
*) relocs
;
2323 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2324 MY_swap_std_reloc_in (abfd
, rptr
, cache_ptr
, symbols
,
2325 bfd_get_symcount (abfd
));
2330 asect
->relocation
= reloc_cache
;
2331 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2336 /* Write out a relocation section into an object file. */
2339 NAME(aout
,squirt_out_relocs
) (abfd
, section
)
2344 unsigned char *native
, *natptr
;
2347 unsigned int count
= section
->reloc_count
;
2350 if (count
== 0) return true;
2352 each_size
= obj_reloc_entry_size (abfd
);
2353 natsize
= each_size
* count
;
2354 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2356 bfd_set_error (bfd_error_no_memory
);
2360 generic
= section
->orelocation
;
2362 if (each_size
== RELOC_EXT_SIZE
)
2364 for (natptr
= native
;
2366 --count
, natptr
+= each_size
, ++generic
)
2367 NAME(aout
,swap_ext_reloc_out
) (abfd
, *generic
, (struct reloc_ext_external
*)natptr
);
2371 for (natptr
= native
;
2373 --count
, natptr
+= each_size
, ++generic
)
2374 MY_swap_std_reloc_out(abfd
, *generic
, (struct reloc_std_external
*)natptr
);
2377 if ( bfd_write ((PTR
) native
, 1, natsize
, abfd
) != natsize
) {
2378 bfd_release(abfd
, native
);
2381 bfd_release (abfd
, native
);
2386 /* This is stupid. This function should be a boolean predicate */
2388 NAME(aout
,canonicalize_reloc
) (abfd
, section
, relptr
, symbols
)
2394 arelent
*tblptr
= section
->relocation
;
2397 if (section
== obj_bsssec (abfd
))
2403 if (!(tblptr
|| NAME(aout
,slurp_reloc_table
)(abfd
, section
, symbols
)))
2406 if (section
->flags
& SEC_CONSTRUCTOR
) {
2407 arelent_chain
*chain
= section
->constructor_chain
;
2408 for (count
= 0; count
< section
->reloc_count
; count
++) {
2409 *relptr
++ = &chain
->relent
;
2410 chain
= chain
->next
;
2414 tblptr
= section
->relocation
;
2416 for (count
= 0; count
++ < section
->reloc_count
;)
2418 *relptr
++ = tblptr
++;
2423 return section
->reloc_count
;
2427 NAME(aout
,get_reloc_upper_bound
) (abfd
, asect
)
2431 if (bfd_get_format (abfd
) != bfd_object
) {
2432 bfd_set_error (bfd_error_invalid_operation
);
2435 if (asect
->flags
& SEC_CONSTRUCTOR
) {
2436 return (sizeof (arelent
*) * (asect
->reloc_count
+1));
2439 if (asect
== obj_datasec (abfd
))
2440 return (sizeof (arelent
*)
2441 * ((exec_hdr(abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
))
2444 if (asect
== obj_textsec (abfd
))
2445 return (sizeof (arelent
*)
2446 * ((exec_hdr(abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
))
2449 if (asect
== obj_bsssec (abfd
))
2450 return sizeof (arelent
*);
2452 if (asect
== obj_bsssec (abfd
))
2455 bfd_set_error (bfd_error_invalid_operation
);
2461 NAME(aout
,get_symtab_upper_bound
) (abfd
)
2464 if (!NAME(aout
,slurp_symbol_table
)(abfd
))
2467 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2472 NAME(aout
,get_lineno
) (ignore_abfd
, ignore_symbol
)
2474 asymbol
*ignore_symbol
;
2476 return (alent
*)NULL
;
2481 NAME(aout
,get_symbol_info
) (ignore_abfd
, symbol
, ret
)
2486 bfd_symbol_info (symbol
, ret
);
2488 if (ret
->type
== '?')
2490 int type_code
= aout_symbol(symbol
)->type
& 0xff;
2491 CONST
char *stab_name
= aout_stab_name(type_code
);
2492 static char buf
[10];
2494 if (stab_name
== NULL
)
2496 sprintf(buf
, "(%d)", type_code
);
2500 ret
->stab_other
= (unsigned)(aout_symbol(symbol
)->other
& 0xff);
2501 ret
->stab_desc
= (unsigned)(aout_symbol(symbol
)->desc
& 0xffff);
2502 ret
->stab_name
= stab_name
;
2508 NAME(aout
,print_symbol
) (ignore_abfd
, afile
, symbol
, how
)
2512 bfd_print_symbol_type how
;
2514 FILE *file
= (FILE *)afile
;
2517 case bfd_print_symbol_name
:
2519 fprintf(file
,"%s", symbol
->name
);
2521 case bfd_print_symbol_more
:
2522 fprintf(file
,"%4x %2x %2x",(unsigned)(aout_symbol(symbol
)->desc
& 0xffff),
2523 (unsigned)(aout_symbol(symbol
)->other
& 0xff),
2524 (unsigned)(aout_symbol(symbol
)->type
));
2526 case bfd_print_symbol_all
:
2528 CONST
char *section_name
= symbol
->section
->name
;
2531 bfd_print_symbol_vandf((PTR
)file
,symbol
);
2533 fprintf(file
," %-5s %04x %02x %02x",
2535 (unsigned)(aout_symbol(symbol
)->desc
& 0xffff),
2536 (unsigned)(aout_symbol(symbol
)->other
& 0xff),
2537 (unsigned)(aout_symbol(symbol
)->type
& 0xff));
2539 fprintf(file
," %s", symbol
->name
);
2545 /* If we don't have to allocate more than 1MB to hold the generic
2546 symbols, we use the generic minisymbol methord: it's faster, since
2547 it only translates the symbols once, not multiple times. */
2548 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2550 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2551 symbols. The minisymbol_to_symbol function translates these into
2552 BFD asymbol structures. */
2555 NAME(aout
,read_minisymbols
) (abfd
, dynamic
, minisymsp
, sizep
)
2559 unsigned int *sizep
;
2563 /* We could handle the dynamic symbols here as well, but it's
2564 easier to hand them off. */
2565 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2568 if (! aout_get_external_symbols (abfd
))
2571 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2572 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2574 *minisymsp
= (PTR
) obj_aout_external_syms (abfd
);
2576 /* By passing the external symbols back from this routine, we are
2577 giving up control over the memory block. Clear
2578 obj_aout_external_syms, so that we do not try to free it
2580 obj_aout_external_syms (abfd
) = NULL
;
2582 *sizep
= EXTERNAL_NLIST_SIZE
;
2583 return obj_aout_external_sym_count (abfd
);
2586 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2587 unmodified a.out symbol. The SYM argument is a structure returned
2588 by bfd_make_empty_symbol, which we fill in here. */
2591 NAME(aout
,minisymbol_to_symbol
) (abfd
, dynamic
, minisym
, sym
)
2598 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2599 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2601 memset (sym
, 0, sizeof (aout_symbol_type
));
2603 /* We call translate_symbol_table to translate a single symbol. */
2604 if (! (NAME(aout
,translate_symbol_table
)
2606 (aout_symbol_type
*) sym
,
2607 (struct external_nlist
*) minisym
,
2609 obj_aout_external_strings (abfd
),
2610 obj_aout_external_string_size (abfd
),
2618 provided a BFD, a section and an offset into the section, calculate
2619 and return the name of the source file and the line nearest to the
2624 NAME(aout
,find_nearest_line
)
2625 (abfd
, section
, symbols
, offset
, filename_ptr
, functionname_ptr
, line_ptr
)
2630 CONST
char **filename_ptr
;
2631 CONST
char **functionname_ptr
;
2632 unsigned int *line_ptr
;
2634 /* Run down the file looking for the filename, function and linenumber */
2636 static char buffer
[100];
2637 static char filename_buffer
[200];
2638 CONST
char *directory_name
= NULL
;
2639 CONST
char *main_file_name
= NULL
;
2640 CONST
char *current_file_name
= NULL
;
2641 CONST
char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2642 bfd_vma low_line_vma
= 0;
2643 bfd_vma low_func_vma
= 0;
2645 *filename_ptr
= abfd
->filename
;
2646 *functionname_ptr
= 0;
2648 if (symbols
!= (asymbol
**)NULL
) {
2649 for (p
= symbols
; *p
; p
++) {
2650 aout_symbol_type
*q
= (aout_symbol_type
*)(*p
);
2654 main_file_name
= current_file_name
= q
->symbol
.name
;
2655 /* Look ahead to next symbol to check if that too is an N_SO. */
2659 q
= (aout_symbol_type
*)(*p
);
2660 if (q
->type
!= (int)N_SO
)
2663 /* Found a second N_SO First is directory; second is filename. */
2664 directory_name
= current_file_name
;
2665 main_file_name
= current_file_name
= q
->symbol
.name
;
2666 if (obj_textsec(abfd
) != section
)
2670 current_file_name
= q
->symbol
.name
;
2677 /* We'll keep this if it resolves nearer than the one we have
2679 if (q
->symbol
.value
>= low_line_vma
2680 && q
->symbol
.value
<= offset
)
2682 *line_ptr
= q
->desc
;
2683 low_line_vma
= q
->symbol
.value
;
2684 line_file_name
= current_file_name
;
2689 /* We'll keep this if it is nearer than the one we have already */
2690 if (q
->symbol
.value
>= low_func_vma
&&
2691 q
->symbol
.value
<= offset
) {
2692 low_func_vma
= q
->symbol
.value
;
2693 func
= (asymbol
*)q
;
2695 else if (q
->symbol
.value
> offset
)
2705 main_file_name
= line_file_name
;
2706 if (main_file_name
) {
2707 if (main_file_name
[0] == '/' || directory_name
== NULL
)
2708 *filename_ptr
= main_file_name
;
2710 sprintf(filename_buffer
, "%.140s%.50s",
2711 directory_name
, main_file_name
);
2712 *filename_ptr
= filename_buffer
;
2717 CONST
char *function
= func
->name
;
2720 /* The caller expects a symbol name. We actually have a
2721 function name, without the leading underscore. Put the
2722 underscore back in, so that the caller gets a symbol name. */
2723 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2724 strncpy (buffer
, function
, sizeof (buffer
) - 1);
2727 buffer
[0] = bfd_get_symbol_leading_char (abfd
);
2728 strncpy (buffer
+ 1, function
, sizeof (buffer
) - 2);
2730 buffer
[sizeof(buffer
)-1] = 0;
2731 /* Have to remove : stuff */
2732 p
= strchr(buffer
,':');
2735 *functionname_ptr
= buffer
;
2742 NAME(aout
,sizeof_headers
) (abfd
, execable
)
2746 return adata(abfd
).exec_bytes_size
;
2749 /* Free all information we have cached for this BFD. We can always
2750 read it again later if we need it. */
2753 NAME(aout
,bfd_free_cached_info
) (abfd
)
2758 if (bfd_get_format (abfd
) != bfd_object
)
2761 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2762 BFCI_FREE (obj_aout_symbols (abfd
));
2763 BFCI_FREE (obj_aout_external_syms (abfd
));
2764 BFCI_FREE (obj_aout_external_strings (abfd
));
2765 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
2766 BFCI_FREE (o
->relocation
);
2772 /* a.out link code. */
2774 static boolean aout_link_add_object_symbols
2775 PARAMS ((bfd
*, struct bfd_link_info
*));
2776 static boolean aout_link_check_archive_element
2777 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*));
2778 static boolean aout_link_free_symbols
PARAMS ((bfd
*));
2779 static boolean aout_link_check_ar_symbols
2780 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*pneeded
));
2781 static boolean aout_link_add_symbols
2782 PARAMS ((bfd
*, struct bfd_link_info
*));
2784 /* Routine to create an entry in an a.out link hash table. */
2786 struct bfd_hash_entry
*
2787 NAME(aout
,link_hash_newfunc
) (entry
, table
, string
)
2788 struct bfd_hash_entry
*entry
;
2789 struct bfd_hash_table
*table
;
2792 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2794 /* Allocate the structure if it has not already been allocated by a
2796 if (ret
== (struct aout_link_hash_entry
*) NULL
)
2797 ret
= ((struct aout_link_hash_entry
*)
2798 bfd_hash_allocate (table
, sizeof (struct aout_link_hash_entry
)));
2799 if (ret
== (struct aout_link_hash_entry
*) NULL
)
2801 bfd_set_error (bfd_error_no_memory
);
2802 return (struct bfd_hash_entry
*) ret
;
2805 /* Call the allocation method of the superclass. */
2806 ret
= ((struct aout_link_hash_entry
*)
2807 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2811 /* Set local fields. */
2812 ret
->written
= false;
2816 return (struct bfd_hash_entry
*) ret
;
2819 /* Initialize an a.out link hash table. */
2822 NAME(aout
,link_hash_table_init
) (table
, abfd
, newfunc
)
2823 struct aout_link_hash_table
*table
;
2825 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
2826 struct bfd_hash_table
*,
2829 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
2832 /* Create an a.out link hash table. */
2834 struct bfd_link_hash_table
*
2835 NAME(aout
,link_hash_table_create
) (abfd
)
2838 struct aout_link_hash_table
*ret
;
2840 ret
= ((struct aout_link_hash_table
*)
2841 bfd_alloc (abfd
, sizeof (struct aout_link_hash_table
)));
2844 bfd_set_error (bfd_error_no_memory
);
2845 return (struct bfd_link_hash_table
*) NULL
;
2847 if (! NAME(aout
,link_hash_table_init
) (ret
, abfd
,
2848 NAME(aout
,link_hash_newfunc
)))
2851 return (struct bfd_link_hash_table
*) NULL
;
2856 /* Given an a.out BFD, add symbols to the global hash table as
2860 NAME(aout
,link_add_symbols
) (abfd
, info
)
2862 struct bfd_link_info
*info
;
2864 switch (bfd_get_format (abfd
))
2867 return aout_link_add_object_symbols (abfd
, info
);
2869 return _bfd_generic_link_add_archive_symbols
2870 (abfd
, info
, aout_link_check_archive_element
);
2872 bfd_set_error (bfd_error_wrong_format
);
2877 /* Add symbols from an a.out object file. */
2880 aout_link_add_object_symbols (abfd
, info
)
2882 struct bfd_link_info
*info
;
2884 if (! aout_get_external_symbols (abfd
))
2886 if (! aout_link_add_symbols (abfd
, info
))
2888 if (! info
->keep_memory
)
2890 if (! aout_link_free_symbols (abfd
))
2896 /* Check a single archive element to see if we need to include it in
2897 the link. *PNEEDED is set according to whether this element is
2898 needed in the link or not. This is called from
2899 _bfd_generic_link_add_archive_symbols. */
2902 aout_link_check_archive_element (abfd
, info
, pneeded
)
2904 struct bfd_link_info
*info
;
2907 if (! aout_get_external_symbols (abfd
))
2910 if (! aout_link_check_ar_symbols (abfd
, info
, pneeded
))
2915 if (! aout_link_add_symbols (abfd
, info
))
2919 if (! info
->keep_memory
|| ! *pneeded
)
2921 if (! aout_link_free_symbols (abfd
))
2928 /* Free up the internal symbols read from an a.out file. */
2931 aout_link_free_symbols (abfd
)
2934 if (obj_aout_external_syms (abfd
) != (struct external_nlist
*) NULL
)
2936 free ((PTR
) obj_aout_external_syms (abfd
));
2937 obj_aout_external_syms (abfd
) = (struct external_nlist
*) NULL
;
2939 if (obj_aout_external_strings (abfd
) != (char *) NULL
)
2941 free ((PTR
) obj_aout_external_strings (abfd
));
2942 obj_aout_external_strings (abfd
) = (char *) NULL
;
2947 /* Look through the internal symbols to see if this object file should
2948 be included in the link. We should include this object file if it
2949 defines any symbols which are currently undefined. If this object
2950 file defines a common symbol, then we may adjust the size of the
2951 known symbol but we do not include the object file in the link
2952 (unless there is some other reason to include it). */
2955 aout_link_check_ar_symbols (abfd
, info
, pneeded
)
2957 struct bfd_link_info
*info
;
2960 register struct external_nlist
*p
;
2961 struct external_nlist
*pend
;
2966 /* Look through all the symbols. */
2967 p
= obj_aout_external_syms (abfd
);
2968 pend
= p
+ obj_aout_external_sym_count (abfd
);
2969 strings
= obj_aout_external_strings (abfd
);
2970 for (; p
< pend
; p
++)
2972 int type
= bfd_h_get_8 (abfd
, p
->e_type
);
2974 struct bfd_link_hash_entry
*h
;
2976 /* Ignore symbols that are not externally visible. This is an
2977 optimization only, as we check the type more thoroughly
2979 if (((type
& N_EXT
) == 0
2980 || (type
& N_STAB
) != 0
2987 if (type
== N_WARNING
2993 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
2994 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
2996 /* We are only interested in symbols that are currently
2997 undefined or common. */
2998 if (h
== (struct bfd_link_hash_entry
*) NULL
2999 || (h
->type
!= bfd_link_hash_undefined
3000 && h
->type
!= bfd_link_hash_common
))
3002 if (type
== (N_INDR
| N_EXT
))
3007 if (type
== (N_TEXT
| N_EXT
)
3008 || type
== (N_DATA
| N_EXT
)
3009 || type
== (N_BSS
| N_EXT
)
3010 || type
== (N_ABS
| N_EXT
)
3011 || type
== (N_INDR
| N_EXT
))
3013 /* This object file defines this symbol. We must link it
3014 in. This is true regardless of whether the current
3015 definition of the symbol is undefined or common. If the
3016 current definition is common, we have a case in which we
3017 have already seen an object file including
3019 and this object file from the archive includes
3021 In such a case we must include this object file.
3023 FIXME: The SunOS 4.1.3 linker will pull in the archive
3024 element if the symbol is defined in the .data section,
3025 but not if it is defined in the .text section. That
3026 seems a bit crazy to me, and I haven't implemented it.
3027 However, it might be correct. */
3028 if (! (*info
->callbacks
->add_archive_element
) (info
, abfd
, name
))
3034 if (type
== (N_UNDF
| N_EXT
))
3038 value
= GET_WORD (abfd
, p
->e_value
);
3041 /* This symbol is common in the object from the archive
3043 if (h
->type
== bfd_link_hash_undefined
)
3048 symbfd
= h
->u
.undef
.abfd
;
3049 if (symbfd
== (bfd
*) NULL
)
3051 /* This symbol was created as undefined from
3052 outside BFD. We assume that we should link
3053 in the object file. This is done for the -u
3054 option in the linker. */
3055 if (! (*info
->callbacks
->add_archive_element
) (info
,
3062 /* Turn the current link symbol into a common
3063 symbol. It is already on the undefs list. */
3064 h
->type
= bfd_link_hash_common
;
3065 h
->u
.c
.p
= ((struct bfd_link_hash_common_entry
*)
3066 bfd_hash_allocate (&info
->hash
->table
,
3067 sizeof (struct bfd_link_hash_common_entry
)));
3068 if (h
->u
.c
.p
== NULL
)
3071 h
->u
.c
.size
= value
;
3073 /* FIXME: This isn't quite right. The maximum
3074 alignment of a common symbol should be set by the
3075 architecture of the output file, not of the input
3077 power
= bfd_log2 (value
);
3078 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
3079 power
= bfd_get_arch_info (abfd
)->section_align_power
;
3080 h
->u
.c
.p
->alignment_power
= power
;
3082 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
3087 /* Adjust the size of the common symbol if
3089 if (value
> h
->u
.c
.size
)
3090 h
->u
.c
.size
= value
;
3100 /* This symbol is weak but defined. We must pull it in if
3101 the current link symbol is undefined, but we don't want
3102 it if the current link symbol is common. */
3103 if (h
->type
== bfd_link_hash_undefined
)
3105 if (! (*info
->callbacks
->add_archive_element
) (info
, abfd
, name
))
3113 /* We do not need this object file. */
3117 /* Add all symbols from an object file to the hash table. */
3120 aout_link_add_symbols (abfd
, info
)
3122 struct bfd_link_info
*info
;
3124 boolean (*add_one_symbol
) PARAMS ((struct bfd_link_info
*, bfd
*,
3125 const char *, flagword
, asection
*,
3126 bfd_vma
, const char *, boolean
,
3128 struct bfd_link_hash_entry
**));
3129 struct external_nlist
*syms
;
3130 bfd_size_type sym_count
;
3133 struct aout_link_hash_entry
**sym_hash
;
3134 register struct external_nlist
*p
;
3135 struct external_nlist
*pend
;
3137 syms
= obj_aout_external_syms (abfd
);
3138 sym_count
= obj_aout_external_sym_count (abfd
);
3139 strings
= obj_aout_external_strings (abfd
);
3140 if (info
->keep_memory
)
3145 if ((abfd
->flags
& DYNAMIC
) != 0
3146 && aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
3148 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
3149 (abfd
, info
, &syms
, &sym_count
, &strings
)))
3153 /* We keep a list of the linker hash table entries that correspond
3154 to particular symbols. We could just look them up in the hash
3155 table, but keeping the list is more efficient. Perhaps this
3156 should be conditional on info->keep_memory. */
3157 sym_hash
= ((struct aout_link_hash_entry
**)
3160 * sizeof (struct aout_link_hash_entry
*))));
3161 if (sym_hash
== NULL
&& sym_count
!= 0)
3163 bfd_set_error (bfd_error_no_memory
);
3166 obj_aout_sym_hashes (abfd
) = sym_hash
;
3168 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
3169 if (add_one_symbol
== NULL
)
3170 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
3173 pend
= p
+ sym_count
;
3174 for (; p
< pend
; p
++, sym_hash
++)
3185 type
= bfd_h_get_8 (abfd
, p
->e_type
);
3187 /* Ignore debugging symbols. */
3188 if ((type
& N_STAB
) != 0)
3191 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3192 value
= GET_WORD (abfd
, p
->e_value
);
3209 /* Ignore symbols that are not externally visible. */
3212 /* Ignore local indirect symbol. */
3217 case N_UNDF
| N_EXT
:
3220 section
= bfd_und_section_ptr
;
3224 section
= bfd_com_section_ptr
;
3227 section
= bfd_abs_section_ptr
;
3229 case N_TEXT
| N_EXT
:
3230 section
= obj_textsec (abfd
);
3231 value
-= bfd_get_section_vma (abfd
, section
);
3233 case N_DATA
| N_EXT
:
3234 case N_SETV
| N_EXT
:
3235 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3236 translate_from_native_sym_flags. */
3237 section
= obj_datasec (abfd
);
3238 value
-= bfd_get_section_vma (abfd
, section
);
3241 section
= obj_bsssec (abfd
);
3242 value
-= bfd_get_section_vma (abfd
, section
);
3244 case N_INDR
| N_EXT
:
3245 /* An indirect symbol. The next symbol is the symbol
3246 which this one really is. */
3247 BFD_ASSERT (p
+ 1 < pend
);
3249 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3250 section
= bfd_ind_section_ptr
;
3251 flags
|= BSF_INDIRECT
;
3253 case N_COMM
| N_EXT
:
3254 section
= bfd_com_section_ptr
;
3256 case N_SETA
: case N_SETA
| N_EXT
:
3257 section
= bfd_abs_section_ptr
;
3258 flags
|= BSF_CONSTRUCTOR
;
3260 case N_SETT
: case N_SETT
| N_EXT
:
3261 section
= obj_textsec (abfd
);
3262 flags
|= BSF_CONSTRUCTOR
;
3263 value
-= bfd_get_section_vma (abfd
, section
);
3265 case N_SETD
: case N_SETD
| N_EXT
:
3266 section
= obj_datasec (abfd
);
3267 flags
|= BSF_CONSTRUCTOR
;
3268 value
-= bfd_get_section_vma (abfd
, section
);
3270 case N_SETB
: case N_SETB
| N_EXT
:
3271 section
= obj_bsssec (abfd
);
3272 flags
|= BSF_CONSTRUCTOR
;
3273 value
-= bfd_get_section_vma (abfd
, section
);
3276 /* A warning symbol. The next symbol is the one to warn
3278 BFD_ASSERT (p
+ 1 < pend
);
3281 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3282 section
= bfd_und_section_ptr
;
3283 flags
|= BSF_WARNING
;
3286 section
= bfd_und_section_ptr
;
3290 section
= bfd_abs_section_ptr
;
3294 section
= obj_textsec (abfd
);
3295 value
-= bfd_get_section_vma (abfd
, section
);
3299 section
= obj_datasec (abfd
);
3300 value
-= bfd_get_section_vma (abfd
, section
);
3304 section
= obj_bsssec (abfd
);
3305 value
-= bfd_get_section_vma (abfd
, section
);
3310 if (! ((*add_one_symbol
)
3311 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, false,
3312 (struct bfd_link_hash_entry
**) sym_hash
)))
3315 /* Restrict the maximum alignment of a common symbol based on
3316 the architecture, since a.out has no way to represent
3317 alignment requirements of a section in a .o file. FIXME:
3318 This isn't quite right: it should use the architecture of the
3319 output file, not the input files. */
3320 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
3321 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
3322 bfd_get_arch_info (abfd
)->section_align_power
))
3323 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3324 bfd_get_arch_info (abfd
)->section_align_power
;
3326 /* If this is a set symbol, and we are not building sets, then
3327 it is possible for the hash entry to not have been set. In
3328 such a case, treat the symbol as not globally defined. */
3329 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3331 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3335 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3342 /* During the final link step we need to pass around a bunch of
3343 information, so we do it in an instance of this structure. */
3345 struct aout_final_link_info
3347 /* General link information. */
3348 struct bfd_link_info
*info
;
3351 /* Reloc file positions. */
3352 file_ptr treloff
, dreloff
;
3353 /* File position of symbols. */
3356 struct bfd_strtab_hash
*strtab
;
3357 /* A buffer large enough to hold the contents of any section. */
3359 /* A buffer large enough to hold the relocs of any section. */
3361 /* A buffer large enough to hold the symbol map of any input BFD. */
3363 /* A buffer large enough to hold output symbols of any input BFD. */
3364 struct external_nlist
*output_syms
;
3367 static boolean aout_link_input_bfd
3368 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
));
3369 static boolean aout_link_write_symbols
3370 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
));
3371 static boolean aout_link_write_other_symbol
3372 PARAMS ((struct aout_link_hash_entry
*, PTR
));
3373 static boolean aout_link_input_section
3374 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
,
3375 asection
*input_section
, file_ptr
*reloff_ptr
,
3376 bfd_size_type rel_size
));
3377 static boolean aout_link_input_section_std
3378 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
,
3379 asection
*input_section
, struct reloc_std_external
*,
3380 bfd_size_type rel_size
, bfd_byte
*contents
));
3381 static boolean aout_link_input_section_ext
3382 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
,
3383 asection
*input_section
, struct reloc_ext_external
*,
3384 bfd_size_type rel_size
, bfd_byte
*contents
));
3385 static INLINE asection
*aout_reloc_index_to_section
3386 PARAMS ((bfd
*, int));
3387 static boolean aout_link_reloc_link_order
3388 PARAMS ((struct aout_final_link_info
*, asection
*,
3389 struct bfd_link_order
*));
3391 /* Do the final link step. This is called on the output BFD. The
3392 INFO structure should point to a list of BFDs linked through the
3393 link_next field which can be used to find each BFD which takes part
3394 in the output. Also, each section in ABFD should point to a list
3395 of bfd_link_order structures which list all the input sections for
3396 the output section. */
3399 NAME(aout
,final_link
) (abfd
, info
, callback
)
3401 struct bfd_link_info
*info
;
3402 void (*callback
) PARAMS ((bfd
*, file_ptr
*, file_ptr
*, file_ptr
*));
3404 struct aout_final_link_info aout_info
;
3406 bfd_size_type trsize
, drsize
;
3407 size_t max_contents_size
;
3408 size_t max_relocs_size
;
3409 size_t max_sym_count
;
3410 bfd_size_type text_size
;
3412 register struct bfd_link_order
*p
;
3414 boolean have_link_order_relocs
;
3417 abfd
->flags
|= DYNAMIC
;
3419 aout_info
.info
= info
;
3420 aout_info
.output_bfd
= abfd
;
3421 aout_info
.contents
= NULL
;
3422 aout_info
.relocs
= NULL
;
3424 /* Figure out the largest section size. Also, if generating
3425 relocateable output, count the relocs. */
3428 max_contents_size
= 0;
3429 max_relocs_size
= 0;
3431 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
3435 if (info
->relocateable
)
3437 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
3439 trsize
+= exec_hdr (sub
)->a_trsize
;
3440 drsize
+= exec_hdr (sub
)->a_drsize
;
3444 /* FIXME: We need to identify the .text and .data sections
3445 and call get_reloc_upper_bound and canonicalize_reloc to
3446 work out the number of relocs needed, and then multiply
3447 by the reloc size. */
3452 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
3454 sz
= bfd_section_size (sub
, obj_textsec (sub
));
3455 if (sz
> max_contents_size
)
3456 max_contents_size
= sz
;
3457 sz
= bfd_section_size (sub
, obj_datasec (sub
));
3458 if (sz
> max_contents_size
)
3459 max_contents_size
= sz
;
3461 sz
= exec_hdr (sub
)->a_trsize
;
3462 if (sz
> max_relocs_size
)
3463 max_relocs_size
= sz
;
3464 sz
= exec_hdr (sub
)->a_drsize
;
3465 if (sz
> max_relocs_size
)
3466 max_relocs_size
= sz
;
3468 sz
= obj_aout_external_sym_count (sub
);
3469 if (sz
> max_sym_count
)
3474 if (info
->relocateable
)
3476 if (obj_textsec (abfd
) != (asection
*) NULL
)
3477 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
3479 * obj_reloc_entry_size (abfd
));
3480 if (obj_datasec (abfd
) != (asection
*) NULL
)
3481 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
3483 * obj_reloc_entry_size (abfd
));
3486 exec_hdr (abfd
)->a_trsize
= trsize
;
3487 exec_hdr (abfd
)->a_drsize
= drsize
;
3489 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
3491 /* Adjust the section sizes and vmas according to the magic number.
3492 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3493 filepos for each section. */
3494 if (! NAME(aout
,adjust_sizes_and_vmas
) (abfd
, &text_size
, &text_end
))
3497 /* The relocation and symbol file positions differ among a.out
3498 targets. We are passed a callback routine from the backend
3499 specific code to handle this.
3500 FIXME: At this point we do not know how much space the symbol
3501 table will require. This will not work for any (nonstandard)
3502 a.out target that needs to know the symbol table size before it
3503 can compute the relocation file positions. This may or may not
3504 be the case for the hp300hpux target, for example. */
3505 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
3507 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
3508 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
3509 obj_sym_filepos (abfd
) = aout_info
.symoff
;
3511 /* We keep a count of the symbols as we output them. */
3512 obj_aout_external_sym_count (abfd
) = 0;
3514 /* We accumulate the string table as we write out the symbols. */
3515 aout_info
.strtab
= _bfd_stringtab_init ();
3516 if (aout_info
.strtab
== NULL
)
3519 /* Allocate buffers to hold section contents and relocs. */
3520 aout_info
.contents
= (bfd_byte
*) malloc (max_contents_size
);
3521 aout_info
.relocs
= (PTR
) malloc (max_relocs_size
);
3522 aout_info
.symbol_map
= (int *) malloc (max_sym_count
* sizeof (int *));
3523 aout_info
.output_syms
= ((struct external_nlist
*)
3524 malloc ((max_sym_count
+ 1)
3525 * sizeof (struct external_nlist
)));
3526 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
3527 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
3528 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
3529 || aout_info
.output_syms
== NULL
)
3531 bfd_set_error (bfd_error_no_memory
);
3535 /* The most time efficient way to do the link would be to read all
3536 the input object files into memory and then sort out the
3537 information into the output file. Unfortunately, that will
3538 probably use too much memory. Another method would be to step
3539 through everything that composes the text section and write it
3540 out, and then everything that composes the data section and write
3541 it out, and then write out the relocs, and then write out the
3542 symbols. Unfortunately, that requires reading stuff from each
3543 input file several times, and we will not be able to keep all the
3544 input files open simultaneously, and reopening them will be slow.
3546 What we do is basically process one input file at a time. We do
3547 everything we need to do with an input file once--copy over the
3548 section contents, handle the relocation information, and write
3549 out the symbols--and then we throw away the information we read
3550 from it. This approach requires a lot of lseeks of the output
3551 file, which is unfortunate but still faster than reopening a lot
3554 We use the output_has_begun field of the input BFDs to see
3555 whether we have already handled it. */
3556 for (sub
= info
->input_bfds
; sub
!= (bfd
*) NULL
; sub
= sub
->link_next
)
3557 sub
->output_has_begun
= false;
3559 have_link_order_relocs
= false;
3560 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
3562 for (p
= o
->link_order_head
;
3563 p
!= (struct bfd_link_order
*) NULL
;
3566 if (p
->type
== bfd_indirect_link_order
3567 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
3568 == bfd_target_aout_flavour
))
3572 input_bfd
= p
->u
.indirect
.section
->owner
;
3573 if (! input_bfd
->output_has_begun
)
3575 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
3577 input_bfd
->output_has_begun
= true;
3580 else if (p
->type
== bfd_section_reloc_link_order
3581 || p
->type
== bfd_symbol_reloc_link_order
)
3583 /* These are handled below. */
3584 have_link_order_relocs
= true;
3588 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
3594 /* Write out any symbols that we have not already written out. */
3595 aout_link_hash_traverse (aout_hash_table (info
),
3596 aout_link_write_other_symbol
,
3599 /* Now handle any relocs we were asked to create by the linker.
3600 These did not come from any input file. We must do these after
3601 we have written out all the symbols, so that we know the symbol
3603 if (have_link_order_relocs
)
3605 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
3607 for (p
= o
->link_order_head
;
3608 p
!= (struct bfd_link_order
*) NULL
;
3611 if (p
->type
== bfd_section_reloc_link_order
3612 || p
->type
== bfd_symbol_reloc_link_order
)
3614 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
3621 if (aout_info
.contents
!= NULL
)
3623 free (aout_info
.contents
);
3624 aout_info
.contents
= NULL
;
3626 if (aout_info
.relocs
!= NULL
)
3628 free (aout_info
.relocs
);
3629 aout_info
.relocs
= NULL
;
3631 if (aout_info
.symbol_map
!= NULL
)
3633 free (aout_info
.symbol_map
);
3634 aout_info
.symbol_map
= NULL
;
3636 if (aout_info
.output_syms
!= NULL
)
3638 free (aout_info
.output_syms
);
3639 aout_info
.output_syms
= NULL
;
3642 /* Finish up any dynamic linking we may be doing. */
3643 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
3645 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
3649 /* Update the header information. */
3650 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
3651 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
3652 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
3653 obj_textsec (abfd
)->reloc_count
=
3654 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
3655 obj_datasec (abfd
)->reloc_count
=
3656 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
3658 /* Write out the string table. */
3659 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
3661 return emit_stringtab (abfd
, aout_info
.strtab
);
3664 if (aout_info
.contents
!= NULL
)
3665 free (aout_info
.contents
);
3666 if (aout_info
.relocs
!= NULL
)
3667 free (aout_info
.relocs
);
3668 if (aout_info
.symbol_map
!= NULL
)
3669 free (aout_info
.symbol_map
);
3670 if (aout_info
.output_syms
!= NULL
)
3671 free (aout_info
.output_syms
);
3675 /* Link an a.out input BFD into the output file. */
3678 aout_link_input_bfd (finfo
, input_bfd
)
3679 struct aout_final_link_info
*finfo
;
3682 bfd_size_type sym_count
;
3684 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
3686 /* If this is a dynamic object, it may need special handling. */
3687 if ((input_bfd
->flags
& DYNAMIC
) != 0
3688 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
3690 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
3691 (finfo
->info
, input_bfd
));
3694 /* Get the symbols. We probably have them already, unless
3695 finfo->info->keep_memory is false. */
3696 if (! aout_get_external_symbols (input_bfd
))
3699 sym_count
= obj_aout_external_sym_count (input_bfd
);
3701 /* Write out the symbols and get a map of the new indices. The map
3702 is placed into finfo->symbol_map. */
3703 if (! aout_link_write_symbols (finfo
, input_bfd
))
3706 /* Relocate and write out the sections. These functions use the
3707 symbol map created by aout_link_write_symbols. */
3708 if (! aout_link_input_section (finfo
, input_bfd
,
3709 obj_textsec (input_bfd
),
3711 exec_hdr (input_bfd
)->a_trsize
)
3712 || ! aout_link_input_section (finfo
, input_bfd
,
3713 obj_datasec (input_bfd
),
3715 exec_hdr (input_bfd
)->a_drsize
))
3718 /* If we are not keeping memory, we don't need the symbols any
3719 longer. We still need them if we are keeping memory, because the
3720 strings in the hash table point into them. */
3721 if (! finfo
->info
->keep_memory
)
3723 if (! aout_link_free_symbols (input_bfd
))
3730 /* Adjust and write out the symbols for an a.out file. Set the new
3731 symbol indices into a symbol_map. */
3734 aout_link_write_symbols (finfo
, input_bfd
)
3735 struct aout_final_link_info
*finfo
;
3739 bfd_size_type sym_count
;
3741 enum bfd_link_strip strip
;
3742 enum bfd_link_discard discard
;
3743 struct external_nlist
*outsym
;
3744 bfd_size_type strtab_index
;
3745 register struct external_nlist
*sym
;
3746 struct external_nlist
*sym_end
;
3747 struct aout_link_hash_entry
**sym_hash
;
3752 output_bfd
= finfo
->output_bfd
;
3753 sym_count
= obj_aout_external_sym_count (input_bfd
);
3754 strings
= obj_aout_external_strings (input_bfd
);
3755 strip
= finfo
->info
->strip
;
3756 discard
= finfo
->info
->discard
;
3757 outsym
= finfo
->output_syms
;
3759 /* First write out a symbol for this object file, unless we are
3760 discarding such symbols. */
3761 if (strip
!= strip_all
3762 && (strip
!= strip_some
3763 || bfd_hash_lookup (finfo
->info
->keep_hash
, input_bfd
->filename
,
3764 false, false) != NULL
)
3765 && discard
!= discard_all
)
3767 bfd_h_put_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
3768 bfd_h_put_8 (output_bfd
, 0, outsym
->e_other
);
3769 bfd_h_put_16 (output_bfd
, (bfd_vma
) 0, outsym
->e_desc
);
3770 strtab_index
= add_to_stringtab (output_bfd
, finfo
->strtab
,
3771 input_bfd
->filename
, false);
3772 if (strtab_index
== (bfd_size_type
) -1)
3774 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
3775 PUT_WORD (output_bfd
,
3776 (bfd_get_section_vma (output_bfd
,
3777 obj_textsec (input_bfd
)->output_section
)
3778 + obj_textsec (input_bfd
)->output_offset
),
3780 ++obj_aout_external_sym_count (output_bfd
);
3786 sym
= obj_aout_external_syms (input_bfd
);
3787 sym_end
= sym
+ sym_count
;
3788 sym_hash
= obj_aout_sym_hashes (input_bfd
);
3789 symbol_map
= finfo
->symbol_map
;
3790 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
3794 struct aout_link_hash_entry
*h
;
3802 type
= bfd_h_get_8 (input_bfd
, sym
->e_type
);
3803 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
3809 /* Pass this symbol through. It is the target of an
3810 indirect or warning symbol. */
3811 val
= GET_WORD (input_bfd
, sym
->e_value
);
3816 /* Skip this symbol, which is the target of an indirect
3817 symbol that we have changed to no longer be an indirect
3824 struct aout_link_hash_entry
*hresolve
;
3826 /* We have saved the hash table entry for this symbol, if
3827 there is one. Note that we could just look it up again
3828 in the hash table, provided we first check that it is an
3832 /* If this is an indirect or warning symbol, then change
3833 hresolve to the base symbol. We also change *sym_hash so
3834 that the relocation routines relocate against the real
3837 if (h
!= (struct aout_link_hash_entry
*) NULL
3838 && (h
->root
.type
== bfd_link_hash_indirect
3839 || h
->root
.type
== bfd_link_hash_warning
))
3841 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3842 while (hresolve
->root
.type
== bfd_link_hash_indirect
3843 || hresolve
->root
.type
== bfd_link_hash_warning
)
3844 hresolve
= ((struct aout_link_hash_entry
*)
3845 hresolve
->root
.u
.i
.link
);
3846 *sym_hash
= hresolve
;
3849 /* If the symbol has already been written out, skip it. */
3850 if (h
!= (struct aout_link_hash_entry
*) NULL
3851 && h
->root
.type
!= bfd_link_hash_warning
3854 if ((type
& N_TYPE
) == N_INDR
3855 || type
== N_WARNING
)
3857 *symbol_map
= h
->indx
;
3861 /* See if we are stripping this symbol. */
3867 case strip_debugger
:
3868 if ((type
& N_STAB
) != 0)
3872 if (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, false, false)
3882 if (h
!= (struct aout_link_hash_entry
*) NULL
)
3887 /* Get the value of the symbol. */
3888 if ((type
& N_TYPE
) == N_TEXT
3890 symsec
= obj_textsec (input_bfd
);
3891 else if ((type
& N_TYPE
) == N_DATA
3893 symsec
= obj_datasec (input_bfd
);
3894 else if ((type
& N_TYPE
) == N_BSS
3896 symsec
= obj_bsssec (input_bfd
);
3897 else if ((type
& N_TYPE
) == N_ABS
3899 symsec
= bfd_abs_section_ptr
;
3900 else if (((type
& N_TYPE
) == N_INDR
3901 && (hresolve
== (struct aout_link_hash_entry
*) NULL
3902 || (hresolve
->root
.type
!= bfd_link_hash_defined
3903 && hresolve
->root
.type
!= bfd_link_hash_defweak
3904 && hresolve
->root
.type
!= bfd_link_hash_common
)))
3905 || type
== N_WARNING
)
3907 /* Pass the next symbol through unchanged. The
3908 condition above for indirect symbols is so that if
3909 the indirect symbol was defined, we output it with
3910 the correct definition so the debugger will
3913 val
= GET_WORD (input_bfd
, sym
->e_value
);
3916 else if ((type
& N_STAB
) != 0)
3918 val
= GET_WORD (input_bfd
, sym
->e_value
);
3923 /* If we get here with an indirect symbol, it means that
3924 we are outputting it with a real definition. In such
3925 a case we do not want to output the next symbol,
3926 which is the target of the indirection. */
3927 if ((type
& N_TYPE
) == N_INDR
)
3932 /* We need to get the value from the hash table. We use
3933 hresolve so that if we have defined an indirect
3934 symbol we output the final definition. */
3935 if (h
== (struct aout_link_hash_entry
*) NULL
)
3937 switch (type
& N_TYPE
)
3940 symsec
= obj_textsec (input_bfd
);
3943 symsec
= obj_datasec (input_bfd
);
3946 symsec
= obj_bsssec (input_bfd
);
3949 symsec
= bfd_abs_section_ptr
;
3956 else if (hresolve
->root
.type
== bfd_link_hash_defined
3957 || hresolve
->root
.type
== bfd_link_hash_defweak
)
3959 asection
*input_section
;
3960 asection
*output_section
;
3962 /* This case usually means a common symbol which was
3963 turned into a defined symbol. */
3964 input_section
= hresolve
->root
.u
.def
.section
;
3965 output_section
= input_section
->output_section
;
3966 BFD_ASSERT (bfd_is_abs_section (output_section
)
3967 || output_section
->owner
== output_bfd
);
3968 val
= (hresolve
->root
.u
.def
.value
3969 + bfd_get_section_vma (output_bfd
, output_section
)
3970 + input_section
->output_offset
);
3972 /* Get the correct type based on the section. If
3973 this is a constructed set, force it to be
3974 globally visible. */
3983 if (output_section
== obj_textsec (output_bfd
))
3984 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
3987 else if (output_section
== obj_datasec (output_bfd
))
3988 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
3991 else if (output_section
== obj_bsssec (output_bfd
))
3992 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
3996 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
4000 else if (hresolve
->root
.type
== bfd_link_hash_common
)
4001 val
= hresolve
->root
.u
.c
.size
;
4002 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
4010 if (symsec
!= (asection
*) NULL
)
4011 val
= (symsec
->output_section
->vma
4012 + symsec
->output_offset
4013 + (GET_WORD (input_bfd
, sym
->e_value
)
4016 /* If this is a global symbol set the written flag, and if
4017 it is a local symbol see if we should discard it. */
4018 if (h
!= (struct aout_link_hash_entry
*) NULL
)
4021 h
->indx
= obj_aout_external_sym_count (output_bfd
);
4023 else if ((type
& N_TYPE
) != N_SETT
4024 && (type
& N_TYPE
) != N_SETD
4025 && (type
& N_TYPE
) != N_SETB
4026 && (type
& N_TYPE
) != N_SETA
)
4033 if (*name
== *finfo
->info
->lprefix
4034 && (finfo
->info
->lprefix_len
== 1
4035 || strncmp (name
, finfo
->info
->lprefix
,
4036 finfo
->info
->lprefix_len
) == 0))
4051 /* Copy this symbol into the list of symbols we are going to
4053 bfd_h_put_8 (output_bfd
, type
, outsym
->e_type
);
4054 bfd_h_put_8 (output_bfd
, bfd_h_get_8 (input_bfd
, sym
->e_other
),
4056 bfd_h_put_16 (output_bfd
, bfd_h_get_16 (input_bfd
, sym
->e_desc
),
4059 if (! finfo
->info
->keep_memory
)
4061 /* name points into a string table which we are going to
4062 free. If there is a hash table entry, use that string.
4063 Otherwise, copy name into memory. */
4064 if (h
!= (struct aout_link_hash_entry
*) NULL
)
4065 name
= h
->root
.root
.string
;
4069 strtab_index
= add_to_stringtab (output_bfd
, finfo
->strtab
,
4071 if (strtab_index
== (bfd_size_type
) -1)
4073 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4074 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
4075 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
4076 ++obj_aout_external_sym_count (output_bfd
);
4080 /* Write out the output symbols we have just constructed. */
4081 if (outsym
> finfo
->output_syms
)
4083 bfd_size_type outsym_count
;
4085 if (bfd_seek (output_bfd
, finfo
->symoff
, SEEK_SET
) != 0)
4087 outsym_count
= outsym
- finfo
->output_syms
;
4088 if (bfd_write ((PTR
) finfo
->output_syms
,
4089 (bfd_size_type
) EXTERNAL_NLIST_SIZE
,
4090 (bfd_size_type
) outsym_count
, output_bfd
)
4091 != outsym_count
* EXTERNAL_NLIST_SIZE
)
4093 finfo
->symoff
+= outsym_count
* EXTERNAL_NLIST_SIZE
;
4099 /* Write out a symbol that was not associated with an a.out input
4103 aout_link_write_other_symbol (h
, data
)
4104 struct aout_link_hash_entry
*h
;
4107 struct aout_final_link_info
*finfo
= (struct aout_final_link_info
*) data
;
4111 struct external_nlist outsym
;
4114 output_bfd
= finfo
->output_bfd
;
4116 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
4118 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
4119 (output_bfd
, finfo
->info
, h
)))
4121 /* FIXME: No way to handle errors. */
4131 /* An indx of -2 means the symbol must be written. */
4133 && (finfo
->info
->strip
== strip_all
4134 || (finfo
->info
->strip
== strip_some
4135 && bfd_hash_lookup (finfo
->info
->keep_hash
, h
->root
.root
.string
,
4136 false, false) == NULL
)))
4139 switch (h
->root
.type
)
4143 /* Avoid variable not initialized warnings. */
4145 case bfd_link_hash_new
:
4146 /* This can happen for set symbols when sets are not being
4149 case bfd_link_hash_undefined
:
4150 type
= N_UNDF
| N_EXT
;
4153 case bfd_link_hash_defined
:
4154 case bfd_link_hash_defweak
:
4158 sec
= h
->root
.u
.def
.section
->output_section
;
4159 BFD_ASSERT (bfd_is_abs_section (sec
)
4160 || sec
->owner
== output_bfd
);
4161 if (sec
== obj_textsec (output_bfd
))
4162 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
4163 else if (sec
== obj_datasec (output_bfd
))
4164 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
4165 else if (sec
== obj_bsssec (output_bfd
))
4166 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
4168 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
4170 val
= (h
->root
.u
.def
.value
4172 + h
->root
.u
.def
.section
->output_offset
);
4175 case bfd_link_hash_common
:
4176 type
= N_UNDF
| N_EXT
;
4177 val
= h
->root
.u
.c
.size
;
4179 case bfd_link_hash_undefweak
:
4182 case bfd_link_hash_indirect
:
4183 case bfd_link_hash_warning
:
4184 /* FIXME: Ignore these for now. The circumstances under which
4185 they should be written out are not clear to me. */
4189 bfd_h_put_8 (output_bfd
, type
, outsym
.e_type
);
4190 bfd_h_put_8 (output_bfd
, 0, outsym
.e_other
);
4191 bfd_h_put_16 (output_bfd
, 0, outsym
.e_desc
);
4192 indx
= add_to_stringtab (output_bfd
, finfo
->strtab
, h
->root
.root
.string
,
4194 if (indx
== (bfd_size_type
) -1)
4196 /* FIXME: No way to handle errors. */
4199 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
4200 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
4202 if (bfd_seek (output_bfd
, finfo
->symoff
, SEEK_SET
) != 0
4203 || bfd_write ((PTR
) &outsym
, (bfd_size_type
) EXTERNAL_NLIST_SIZE
,
4204 (bfd_size_type
) 1, output_bfd
) != EXTERNAL_NLIST_SIZE
)
4206 /* FIXME: No way to handle errors. */
4210 finfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
4211 h
->indx
= obj_aout_external_sym_count (output_bfd
);
4212 ++obj_aout_external_sym_count (output_bfd
);
4217 /* Link an a.out section into the output file. */
4220 aout_link_input_section (finfo
, input_bfd
, input_section
, reloff_ptr
,
4222 struct aout_final_link_info
*finfo
;
4224 asection
*input_section
;
4225 file_ptr
*reloff_ptr
;
4226 bfd_size_type rel_size
;
4228 bfd_size_type input_size
;
4231 /* Get the section contents. */
4232 input_size
= bfd_section_size (input_bfd
, input_section
);
4233 if (! bfd_get_section_contents (input_bfd
, input_section
,
4234 (PTR
) finfo
->contents
,
4235 (file_ptr
) 0, input_size
))
4238 /* Read in the relocs if we haven't already done it. */
4239 if (aout_section_data (input_section
) != NULL
4240 && aout_section_data (input_section
)->relocs
!= NULL
)
4241 relocs
= aout_section_data (input_section
)->relocs
;
4244 relocs
= finfo
->relocs
;
4247 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4248 || bfd_read (relocs
, 1, rel_size
, input_bfd
) != rel_size
)
4253 /* Relocate the section contents. */
4254 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4256 if (! aout_link_input_section_std (finfo
, input_bfd
, input_section
,
4257 (struct reloc_std_external
*) relocs
,
4258 rel_size
, finfo
->contents
))
4263 if (! aout_link_input_section_ext (finfo
, input_bfd
, input_section
,
4264 (struct reloc_ext_external
*) relocs
,
4265 rel_size
, finfo
->contents
))
4269 /* Write out the section contents. */
4270 if (! bfd_set_section_contents (finfo
->output_bfd
,
4271 input_section
->output_section
,
4272 (PTR
) finfo
->contents
,
4273 input_section
->output_offset
,
4277 /* If we are producing relocateable output, the relocs were
4278 modified, and we now write them out. */
4279 if (finfo
->info
->relocateable
&& rel_size
> 0)
4281 if (bfd_seek (finfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4283 if (bfd_write (relocs
, (bfd_size_type
) 1, rel_size
, finfo
->output_bfd
)
4286 *reloff_ptr
+= rel_size
;
4288 /* Assert that the relocs have not run into the symbols, and
4289 that if these are the text relocs they have not run into the
4291 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (finfo
->output_bfd
)
4292 && (reloff_ptr
!= &finfo
->treloff
4294 <= obj_datasec (finfo
->output_bfd
)->rel_filepos
)));
4300 /* Get the section corresponding to a reloc index. */
4302 static INLINE asection
*
4303 aout_reloc_index_to_section (abfd
, indx
)
4307 switch (indx
& N_TYPE
)
4310 return obj_textsec (abfd
);
4312 return obj_datasec (abfd
);
4314 return obj_bsssec (abfd
);
4317 return bfd_abs_section_ptr
;
4323 /* Relocate an a.out section using standard a.out relocs. */
4326 aout_link_input_section_std (finfo
, input_bfd
, input_section
, relocs
,
4328 struct aout_final_link_info
*finfo
;
4330 asection
*input_section
;
4331 struct reloc_std_external
*relocs
;
4332 bfd_size_type rel_size
;
4335 boolean (*check_dynamic_reloc
) PARAMS ((struct bfd_link_info
*,
4337 struct aout_link_hash_entry
*,
4338 PTR
, bfd_byte
*, boolean
*,
4341 boolean relocateable
;
4342 struct external_nlist
*syms
;
4344 struct aout_link_hash_entry
**sym_hashes
;
4346 bfd_size_type reloc_count
;
4347 register struct reloc_std_external
*rel
;
4348 struct reloc_std_external
*rel_end
;
4350 output_bfd
= finfo
->output_bfd
;
4351 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4353 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
4354 BFD_ASSERT (input_bfd
->xvec
->header_byteorder_big_p
4355 == output_bfd
->xvec
->header_byteorder_big_p
);
4357 relocateable
= finfo
->info
->relocateable
;
4358 syms
= obj_aout_external_syms (input_bfd
);
4359 strings
= obj_aout_external_strings (input_bfd
);
4360 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4361 symbol_map
= finfo
->symbol_map
;
4363 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4365 rel_end
= rel
+ reloc_count
;
4366 for (; rel
< rel_end
; rel
++)
4373 reloc_howto_type
*howto
;
4374 struct aout_link_hash_entry
*h
= NULL
;
4376 bfd_reloc_status_type r
;
4378 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4380 #ifdef MY_reloc_howto
4381 howto
= MY_reloc_howto(input_bfd
, rel
, r_index
, r_extern
, r_pcrel
);
4387 unsigned int howto_idx
;
4389 if (input_bfd
->xvec
->header_byteorder_big_p
)
4391 r_index
= ((rel
->r_index
[0] << 16)
4392 | (rel
->r_index
[1] << 8)
4394 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4395 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4396 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4397 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4398 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4399 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4400 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4404 r_index
= ((rel
->r_index
[2] << 16)
4405 | (rel
->r_index
[1] << 8)
4407 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4408 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4409 r_baserel
= (0 != (rel
->r_type
[0]
4410 & RELOC_STD_BITS_BASEREL_LITTLE
));
4411 r_jmptable
= (0 != (rel
->r_type
[0]
4412 & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4413 r_relative
= (0 != (rel
->r_type
[0]
4414 & RELOC_STD_BITS_RELATIVE_LITTLE
));
4415 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4416 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4419 howto_idx
= (r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4420 + 16 * r_jmptable
+ 32 * r_relative
);
4421 BFD_ASSERT (howto_idx
< TABLE_SIZE (howto_table_std
));
4422 howto
= howto_table_std
+ howto_idx
;
4428 /* We are generating a relocateable output file, and must
4429 modify the reloc accordingly. */
4432 /* If we know the symbol this relocation is against,
4433 convert it into a relocation against a section. This
4434 is what the native linker does. */
4435 h
= sym_hashes
[r_index
];
4436 if (h
!= (struct aout_link_hash_entry
*) NULL
4437 && (h
->root
.type
== bfd_link_hash_defined
4438 || h
->root
.type
== bfd_link_hash_defweak
))
4440 asection
*output_section
;
4442 /* Change the r_extern value. */
4443 if (output_bfd
->xvec
->header_byteorder_big_p
)
4444 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4446 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4448 /* Compute a new r_index. */
4449 output_section
= h
->root
.u
.def
.section
->output_section
;
4450 if (output_section
== obj_textsec (output_bfd
))
4452 else if (output_section
== obj_datasec (output_bfd
))
4454 else if (output_section
== obj_bsssec (output_bfd
))
4459 /* Add the symbol value and the section VMA to the
4460 addend stored in the contents. */
4461 relocation
= (h
->root
.u
.def
.value
4462 + output_section
->vma
4463 + h
->root
.u
.def
.section
->output_offset
);
4467 /* We must change r_index according to the symbol
4469 r_index
= symbol_map
[r_index
];
4475 /* We decided to strip this symbol, but it
4476 turns out that we can't. Note that we
4477 lose the other and desc information here.
4478 I don't think that will ever matter for a
4484 if (! aout_link_write_other_symbol (h
,
4494 name
= strings
+ GET_WORD (input_bfd
,
4495 syms
[r_index
].e_strx
);
4496 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
4497 (finfo
->info
, name
, input_bfd
, input_section
,
4507 /* Write out the new r_index value. */
4508 if (output_bfd
->xvec
->header_byteorder_big_p
)
4510 rel
->r_index
[0] = r_index
>> 16;
4511 rel
->r_index
[1] = r_index
>> 8;
4512 rel
->r_index
[2] = r_index
;
4516 rel
->r_index
[2] = r_index
>> 16;
4517 rel
->r_index
[1] = r_index
>> 8;
4518 rel
->r_index
[0] = r_index
;
4525 /* This is a relocation against a section. We must
4526 adjust by the amount that the section moved. */
4527 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4528 relocation
= (section
->output_section
->vma
4529 + section
->output_offset
4533 /* Change the address of the relocation. */
4534 PUT_WORD (output_bfd
,
4535 r_addr
+ input_section
->output_offset
,
4538 /* Adjust a PC relative relocation by removing the reference
4539 to the original address in the section and including the
4540 reference to the new address. */
4542 relocation
-= (input_section
->output_section
->vma
4543 + input_section
->output_offset
4544 - input_section
->vma
);
4546 #ifdef MY_relocatable_reloc
4547 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
4550 if (relocation
== 0)
4553 r
= _bfd_relocate_contents (howto
,
4554 input_bfd
, relocation
,
4561 /* We are generating an executable, and must do a full
4566 h
= sym_hashes
[r_index
];
4568 if (h
!= (struct aout_link_hash_entry
*) NULL
4569 && (h
->root
.type
== bfd_link_hash_defined
4570 || h
->root
.type
== bfd_link_hash_defweak
))
4572 relocation
= (h
->root
.u
.def
.value
4573 + h
->root
.u
.def
.section
->output_section
->vma
4574 + h
->root
.u
.def
.section
->output_offset
);
4576 else if (h
!= (struct aout_link_hash_entry
*) NULL
4577 && h
->root
.type
== bfd_link_hash_undefweak
)
4589 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4590 relocation
= (section
->output_section
->vma
4591 + section
->output_offset
4594 relocation
+= input_section
->vma
;
4597 if (check_dynamic_reloc
!= NULL
)
4601 if (! ((*check_dynamic_reloc
)
4602 (finfo
->info
, input_bfd
, input_section
, h
,
4603 (PTR
) rel
, contents
, &skip
, &relocation
)))
4609 /* Now warn if a global symbol is undefined. We could not
4610 do this earlier, because check_dynamic_reloc might want
4611 to skip this reloc. */
4612 if (hundef
&& ! finfo
->info
->shared
&& ! r_baserel
)
4616 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4617 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
4618 (finfo
->info
, name
, input_bfd
, input_section
, r_addr
)))
4622 r
= _bfd_final_link_relocate (howto
,
4623 input_bfd
, input_section
,
4624 contents
, r_addr
, relocation
,
4628 if (r
!= bfd_reloc_ok
)
4633 case bfd_reloc_outofrange
:
4635 case bfd_reloc_overflow
:
4640 name
= strings
+ GET_WORD (input_bfd
,
4641 syms
[r_index
].e_strx
);
4646 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4647 name
= bfd_section_name (input_bfd
, s
);
4649 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
4650 (finfo
->info
, name
, howto
->name
,
4651 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
)))
4662 /* Relocate an a.out section using extended a.out relocs. */
4665 aout_link_input_section_ext (finfo
, input_bfd
, input_section
, relocs
,
4667 struct aout_final_link_info
*finfo
;
4669 asection
*input_section
;
4670 struct reloc_ext_external
*relocs
;
4671 bfd_size_type rel_size
;
4674 boolean (*check_dynamic_reloc
) PARAMS ((struct bfd_link_info
*,
4676 struct aout_link_hash_entry
*,
4677 PTR
, bfd_byte
*, boolean
*,
4680 boolean relocateable
;
4681 struct external_nlist
*syms
;
4683 struct aout_link_hash_entry
**sym_hashes
;
4685 bfd_size_type reloc_count
;
4686 register struct reloc_ext_external
*rel
;
4687 struct reloc_ext_external
*rel_end
;
4689 output_bfd
= finfo
->output_bfd
;
4690 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4692 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4693 BFD_ASSERT (input_bfd
->xvec
->header_byteorder_big_p
4694 == output_bfd
->xvec
->header_byteorder_big_p
);
4696 relocateable
= finfo
->info
->relocateable
;
4697 syms
= obj_aout_external_syms (input_bfd
);
4698 strings
= obj_aout_external_strings (input_bfd
);
4699 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4700 symbol_map
= finfo
->symbol_map
;
4702 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4704 rel_end
= rel
+ reloc_count
;
4705 for (; rel
< rel_end
; rel
++)
4710 unsigned int r_type
;
4712 struct aout_link_hash_entry
*h
= NULL
;
4713 asection
*r_section
= NULL
;
4716 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4718 if (input_bfd
->xvec
->header_byteorder_big_p
)
4720 r_index
= ((rel
->r_index
[0] << 16)
4721 | (rel
->r_index
[1] << 8)
4723 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4724 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4725 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4729 r_index
= ((rel
->r_index
[2] << 16)
4730 | (rel
->r_index
[1] << 8)
4732 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4733 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4734 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4737 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4739 BFD_ASSERT (r_type
< TABLE_SIZE (howto_table_ext
));
4743 /* We are generating a relocateable output file, and must
4744 modify the reloc accordingly. */
4747 /* If we know the symbol this relocation is against,
4748 convert it into a relocation against a section. This
4749 is what the native linker does. */
4750 h
= sym_hashes
[r_index
];
4751 if (h
!= (struct aout_link_hash_entry
*) NULL
4752 && (h
->root
.type
== bfd_link_hash_defined
4753 || h
->root
.type
== bfd_link_hash_defweak
))
4755 asection
*output_section
;
4757 /* Change the r_extern value. */
4758 if (output_bfd
->xvec
->header_byteorder_big_p
)
4759 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4761 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4763 /* Compute a new r_index. */
4764 output_section
= h
->root
.u
.def
.section
->output_section
;
4765 if (output_section
== obj_textsec (output_bfd
))
4767 else if (output_section
== obj_datasec (output_bfd
))
4769 else if (output_section
== obj_bsssec (output_bfd
))
4774 /* Add the symbol value and the section VMA to the
4776 relocation
= (h
->root
.u
.def
.value
4777 + output_section
->vma
4778 + h
->root
.u
.def
.section
->output_offset
);
4780 /* Now RELOCATION is the VMA of the final
4781 destination. If this is a PC relative reloc,
4782 then ADDEND is the negative of the source VMA.
4783 We want to set ADDEND to the difference between
4784 the destination VMA and the source VMA, which
4785 means we must adjust RELOCATION by the change in
4786 the source VMA. This is done below. */
4790 /* We must change r_index according to the symbol
4792 r_index
= symbol_map
[r_index
];
4798 /* We decided to strip this symbol, but it
4799 turns out that we can't. Note that we
4800 lose the other and desc information here.
4801 I don't think that will ever matter for a
4807 if (! aout_link_write_other_symbol (h
,
4817 name
= strings
+ GET_WORD (input_bfd
,
4818 syms
[r_index
].e_strx
);
4819 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
4820 (finfo
->info
, name
, input_bfd
, input_section
,
4829 /* If this is a PC relative reloc, then the addend
4830 is the negative of the source VMA. We must
4831 adjust it by the change in the source VMA. This
4835 /* Write out the new r_index value. */
4836 if (output_bfd
->xvec
->header_byteorder_big_p
)
4838 rel
->r_index
[0] = r_index
>> 16;
4839 rel
->r_index
[1] = r_index
>> 8;
4840 rel
->r_index
[2] = r_index
;
4844 rel
->r_index
[2] = r_index
>> 16;
4845 rel
->r_index
[1] = r_index
>> 8;
4846 rel
->r_index
[0] = r_index
;
4851 /* This is a relocation against a section. We must
4852 adjust by the amount that the section moved. */
4853 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4854 relocation
= (r_section
->output_section
->vma
4855 + r_section
->output_offset
4858 /* If this is a PC relative reloc, then the addend is
4859 the difference in VMA between the destination and the
4860 source. We have just adjusted for the change in VMA
4861 of the destination, so we must also adjust by the
4862 change in VMA of the source. This is done below. */
4865 /* As described above, we must always adjust a PC relative
4866 reloc by the change in VMA of the source. */
4867 if (howto_table_ext
[r_type
].pc_relative
)
4868 relocation
-= (input_section
->output_section
->vma
4869 + input_section
->output_offset
4870 - input_section
->vma
);
4872 /* Change the addend if necessary. */
4873 if (relocation
!= 0)
4874 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4876 /* Change the address of the relocation. */
4877 PUT_WORD (output_bfd
,
4878 r_addr
+ input_section
->output_offset
,
4884 bfd_reloc_status_type r
;
4886 /* We are generating an executable, and must do a full
4891 h
= sym_hashes
[r_index
];
4893 if (h
!= (struct aout_link_hash_entry
*) NULL
4894 && (h
->root
.type
== bfd_link_hash_defined
4895 || h
->root
.type
== bfd_link_hash_defweak
))
4897 relocation
= (h
->root
.u
.def
.value
4898 + h
->root
.u
.def
.section
->output_section
->vma
4899 + h
->root
.u
.def
.section
->output_offset
);
4901 else if (h
!= (struct aout_link_hash_entry
*) NULL
4902 && h
->root
.type
== bfd_link_hash_undefweak
)
4910 else if (r_type
== RELOC_BASE10
4911 || r_type
== RELOC_BASE13
4912 || r_type
== RELOC_BASE22
)
4914 struct external_nlist
*sym
;
4917 /* For base relative relocs, r_index is always an index
4918 into the symbol table, even if r_extern is 0. */
4919 sym
= syms
+ r_index
;
4920 type
= bfd_h_get_8 (input_bfd
, sym
->e_type
);
4921 if ((type
& N_TYPE
) == N_TEXT
4923 r_section
= obj_textsec (input_bfd
);
4924 else if ((type
& N_TYPE
) == N_DATA
4926 r_section
= obj_datasec (input_bfd
);
4927 else if ((type
& N_TYPE
) == N_BSS
4929 r_section
= obj_bsssec (input_bfd
);
4930 else if ((type
& N_TYPE
) == N_ABS
4932 r_section
= bfd_abs_section_ptr
;
4935 relocation
= (r_section
->output_section
->vma
4936 + r_section
->output_offset
4937 + (GET_WORD (input_bfd
, sym
->e_value
)
4942 r_section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4944 /* If this is a PC relative reloc, then R_ADDEND is the
4945 difference between the two vmas, or
4946 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4948 old_dest_sec == section->vma
4950 old_src_sec == input_section->vma
4952 old_src_off == r_addr
4954 _bfd_final_link_relocate expects RELOCATION +
4955 R_ADDEND to be the VMA of the destination minus
4956 r_addr (the minus r_addr is because this relocation
4957 is not pcrel_offset, which is a bit confusing and
4958 should, perhaps, be changed), or
4961 new_dest_sec == output_section->vma + output_offset
4962 We arrange for this to happen by setting RELOCATION to
4963 new_dest_sec + old_src_sec - old_dest_sec
4965 If this is not a PC relative reloc, then R_ADDEND is
4966 simply the VMA of the destination, so we set
4967 RELOCATION to the change in the destination VMA, or
4968 new_dest_sec - old_dest_sec
4970 relocation
= (r_section
->output_section
->vma
4971 + r_section
->output_offset
4973 if (howto_table_ext
[r_type
].pc_relative
)
4974 relocation
+= input_section
->vma
;
4977 if (check_dynamic_reloc
!= NULL
)
4981 if (! ((*check_dynamic_reloc
)
4982 (finfo
->info
, input_bfd
, input_section
, h
,
4983 (PTR
) rel
, contents
, &skip
, &relocation
)))
4989 /* Now warn if a global symbol is undefined. We could not
4990 do this earlier, because check_dynamic_reloc might want
4991 to skip this reloc. */
4993 && ! finfo
->info
->shared
4994 && r_type
!= RELOC_BASE10
4995 && r_type
!= RELOC_BASE13
4996 && r_type
!= RELOC_BASE22
)
5000 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
5001 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
5002 (finfo
->info
, name
, input_bfd
, input_section
, r_addr
)))
5006 r
= _bfd_final_link_relocate (howto_table_ext
+ r_type
,
5007 input_bfd
, input_section
,
5008 contents
, r_addr
, relocation
,
5010 if (r
!= bfd_reloc_ok
)
5015 case bfd_reloc_outofrange
:
5017 case bfd_reloc_overflow
:
5022 || r_type
== RELOC_BASE10
5023 || r_type
== RELOC_BASE13
5024 || r_type
== RELOC_BASE22
)
5025 name
= strings
+ GET_WORD (input_bfd
,
5026 syms
[r_index
].e_strx
);
5031 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
5032 name
= bfd_section_name (input_bfd
, s
);
5034 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
5035 (finfo
->info
, name
, howto_table_ext
[r_type
].name
,
5036 r_addend
, input_bfd
, input_section
, r_addr
)))
5048 /* Handle a link order which is supposed to generate a reloc. */
5051 aout_link_reloc_link_order (finfo
, o
, p
)
5052 struct aout_final_link_info
*finfo
;
5054 struct bfd_link_order
*p
;
5056 struct bfd_link_order_reloc
*pr
;
5059 reloc_howto_type
*howto
;
5060 file_ptr
*reloff_ptr
;
5061 struct reloc_std_external srel
;
5062 struct reloc_ext_external erel
;
5067 if (p
->type
== bfd_section_reloc_link_order
)
5070 if (bfd_is_abs_section (pr
->u
.section
))
5071 r_index
= N_ABS
| N_EXT
;
5074 BFD_ASSERT (pr
->u
.section
->owner
== finfo
->output_bfd
);
5075 r_index
= pr
->u
.section
->target_index
;
5080 struct aout_link_hash_entry
*h
;
5082 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
5084 h
= aout_link_hash_lookup (aout_hash_table (finfo
->info
),
5085 pr
->u
.name
, false, false, true);
5086 if (h
!= (struct aout_link_hash_entry
*) NULL
5091 /* We decided to strip this symbol, but it turns out that we
5092 can't. Note that we lose the other and desc information
5093 here. I don't think that will ever matter for a global
5097 if (! aout_link_write_other_symbol (h
, (PTR
) finfo
))
5103 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
5104 (finfo
->info
, pr
->u
.name
, (bfd
*) NULL
,
5105 (asection
*) NULL
, (bfd_vma
) 0)))
5111 howto
= bfd_reloc_type_lookup (finfo
->output_bfd
, pr
->reloc
);
5114 bfd_set_error (bfd_error_bad_value
);
5118 if (o
== obj_textsec (finfo
->output_bfd
))
5119 reloff_ptr
= &finfo
->treloff
;
5120 else if (o
== obj_datasec (finfo
->output_bfd
))
5121 reloff_ptr
= &finfo
->dreloff
;
5125 if (obj_reloc_entry_size (finfo
->output_bfd
) == RELOC_STD_SIZE
)
5128 MY_put_reloc(finfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
5138 r_pcrel
= howto
->pc_relative
;
5139 r_baserel
= (howto
->type
& 8) != 0;
5140 r_jmptable
= (howto
->type
& 16) != 0;
5141 r_relative
= (howto
->type
& 32) != 0;
5142 r_length
= howto
->size
;
5144 PUT_WORD (finfo
->output_bfd
, p
->offset
, srel
.r_address
);
5145 if (finfo
->output_bfd
->xvec
->header_byteorder_big_p
)
5147 srel
.r_index
[0] = r_index
>> 16;
5148 srel
.r_index
[1] = r_index
>> 8;
5149 srel
.r_index
[2] = r_index
;
5151 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
5152 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
5153 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
5154 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
5155 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
5156 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
5160 srel
.r_index
[2] = r_index
>> 16;
5161 srel
.r_index
[1] = r_index
>> 8;
5162 srel
.r_index
[0] = r_index
;
5164 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
5165 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
5166 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
5167 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
5168 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
5169 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
5173 rel_ptr
= (PTR
) &srel
;
5175 /* We have to write the addend into the object file, since
5176 standard a.out relocs are in place. It would be more
5177 reliable if we had the current contents of the file here,
5178 rather than assuming zeroes, but we can't read the file since
5179 it was opened using bfd_openw. */
5180 if (pr
->addend
!= 0)
5183 bfd_reloc_status_type r
;
5187 size
= bfd_get_reloc_size (howto
);
5188 buf
= (bfd_byte
*) bfd_zmalloc (size
);
5189 if (buf
== (bfd_byte
*) NULL
)
5191 bfd_set_error (bfd_error_no_memory
);
5194 r
= _bfd_relocate_contents (howto
, finfo
->output_bfd
,
5201 case bfd_reloc_outofrange
:
5203 case bfd_reloc_overflow
:
5204 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
5206 (p
->type
== bfd_section_reloc_link_order
5207 ? bfd_section_name (finfo
->output_bfd
,
5210 howto
->name
, pr
->addend
, (bfd
*) NULL
,
5211 (asection
*) NULL
, (bfd_vma
) 0)))
5218 ok
= bfd_set_section_contents (finfo
->output_bfd
, o
,
5220 (file_ptr
) p
->offset
,
5229 PUT_WORD (finfo
->output_bfd
, p
->offset
, erel
.r_address
);
5231 if (finfo
->output_bfd
->xvec
->header_byteorder_big_p
)
5233 erel
.r_index
[0] = r_index
>> 16;
5234 erel
.r_index
[1] = r_index
>> 8;
5235 erel
.r_index
[2] = r_index
;
5237 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
5238 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
5242 erel
.r_index
[2] = r_index
>> 16;
5243 erel
.r_index
[1] = r_index
>> 8;
5244 erel
.r_index
[0] = r_index
;
5246 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
5247 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
5250 PUT_WORD (finfo
->output_bfd
, pr
->addend
, erel
.r_addend
);
5252 rel_ptr
= (PTR
) &erel
;
5255 if (bfd_seek (finfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
5256 || (bfd_write (rel_ptr
, (bfd_size_type
) 1,
5257 obj_reloc_entry_size (finfo
->output_bfd
),
5259 != obj_reloc_entry_size (finfo
->output_bfd
)))
5262 *reloff_ptr
+= obj_reloc_entry_size (finfo
->output_bfd
);
5264 /* Assert that the relocs have not run into the symbols, and that n
5265 the text relocs have not run into the data relocs. */
5266 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (finfo
->output_bfd
)
5267 && (reloff_ptr
!= &finfo
->treloff
5269 <= obj_datasec (finfo
->output_bfd
)->rel_filepos
)));