1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
69 | #define TARGET_NAME "a.out-sunos-big"
70 | #define VECNAME sunos_big_vec
73 requires all the names from @file{aout32.c}, and produces the jump vector
77 The file @file{host-aout.c} is a special case. It is for a large set
78 of hosts that use ``more or less standard'' a.out files, and
79 for which cross-debugging is not interesting. It uses the
80 standard 32-bit a.out support routines, but determines the
81 file offsets and addresses of the text, data, and BSS
82 sections, the machine architecture and machine type, and the
83 entry point address, in a host-dependent manner. Once these
84 values have been determined, generic code is used to handle
87 When porting it to run on a new system, you must supply:
91 | HOST_MACHINE_ARCH (optional)
92 | HOST_MACHINE_MACHINE (optional)
93 | HOST_TEXT_START_ADDR
96 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
97 values, plus the structures and macros defined in @file{a.out.h} on
98 your host system, will produce a BFD target that will access
99 ordinary a.out files on your host. To configure a new machine
100 to use @file{host-aout.c}, specify:
102 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
103 | TDEPFILES= host-aout.o trad-core.o
105 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
107 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
108 configuration is selected.
113 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
114 Doesn't matter what the setting of WP_TEXT is on output, but it'll
116 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
117 * Any BFD with both flags clear is OMAGIC.
118 (Just want to make these explicit, so the conditions tested in this
119 file make sense if you're more familiar with a.out than with BFD.) */
122 #define KEEPITTYPE int
124 #include <string.h> /* For strchr and friends */
131 #include "aout/aout64.h"
132 #include "aout/stab_gnu.h"
135 static boolean aout_get_external_symbols
PARAMS ((bfd
*));
136 static boolean translate_from_native_sym_flags
137 PARAMS ((bfd
*, aout_symbol_type
*));
138 static boolean translate_to_native_sym_flags
139 PARAMS ((bfd
*, asymbol
*, struct external_nlist
*));
146 The file @file{aoutx.h} provides for both the @emph{standard}
147 and @emph{extended} forms of a.out relocation records.
149 The standard records contain only an
150 address, a symbol index, and a type field. The extended records
151 (used on 29ks and sparcs) also have a full integer for an
155 #define CTOR_TABLE_RELOC_IDX 2
157 #define howto_table_ext NAME(aout,ext_howto_table)
158 #define howto_table_std NAME(aout,std_howto_table)
160 reloc_howto_type howto_table_ext
[] =
162 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
163 HOWTO(RELOC_8
, 0, 0, 8, false, 0, complain_overflow_bitfield
,0,"8", false, 0,0x000000ff, false),
164 HOWTO(RELOC_16
, 0, 1, 16, false, 0, complain_overflow_bitfield
,0,"16", false, 0,0x0000ffff, false),
165 HOWTO(RELOC_32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"32", false, 0,0xffffffff, false),
166 HOWTO(RELOC_DISP8
, 0, 0, 8, true, 0, complain_overflow_signed
,0,"DISP8", false, 0,0x000000ff, false),
167 HOWTO(RELOC_DISP16
, 0, 1, 16, true, 0, complain_overflow_signed
,0,"DISP16", false, 0,0x0000ffff, false),
168 HOWTO(RELOC_DISP32
, 0, 2, 32, true, 0, complain_overflow_signed
,0,"DISP32", false, 0,0xffffffff, false),
169 HOWTO(RELOC_WDISP30
,2, 2, 30, true, 0, complain_overflow_signed
,0,"WDISP30", false, 0,0x3fffffff, false),
170 HOWTO(RELOC_WDISP22
,2, 2, 22, true, 0, complain_overflow_signed
,0,"WDISP22", false, 0,0x003fffff, false),
171 HOWTO(RELOC_HI22
, 10, 2, 22, false, 0, complain_overflow_bitfield
,0,"HI22", false, 0,0x003fffff, false),
172 HOWTO(RELOC_22
, 0, 2, 22, false, 0, complain_overflow_bitfield
,0,"22", false, 0,0x003fffff, false),
173 HOWTO(RELOC_13
, 0, 2, 13, false, 0, complain_overflow_bitfield
,0,"13", false, 0,0x00001fff, false),
174 HOWTO(RELOC_LO10
, 0, 2, 10, false, 0, complain_overflow_dont
,0,"LO10", false, 0,0x000003ff, false),
175 HOWTO(RELOC_SFA_BASE
,0, 2, 32, false, 0, complain_overflow_bitfield
,0,"SFA_BASE", false, 0,0xffffffff, false),
176 HOWTO(RELOC_SFA_OFF13
,0,2, 32, false, 0, complain_overflow_bitfield
,0,"SFA_OFF13",false, 0,0xffffffff, false),
177 HOWTO(RELOC_BASE10
, 0, 2, 16, false, 0, complain_overflow_bitfield
,0,"BASE10", false, 0,0x0000ffff, false),
178 HOWTO(RELOC_BASE13
, 0, 2, 13, false, 0, complain_overflow_bitfield
,0,"BASE13", false, 0,0x00001fff, false),
179 HOWTO(RELOC_BASE22
, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"BASE22", false, 0,0x00000000, false),
180 HOWTO(RELOC_PC10
, 0, 2, 10, false, 0, complain_overflow_bitfield
,0,"PC10", false, 0,0x000003ff, false),
181 HOWTO(RELOC_PC22
, 0, 2, 22, false, 0, complain_overflow_bitfield
,0,"PC22", false, 0,0x003fffff, false),
182 HOWTO(RELOC_JMP_TBL
,0, 2, 32, false, 0, complain_overflow_bitfield
,0,"JMP_TBL", false, 0,0xffffffff, false),
183 HOWTO(RELOC_SEGOFF16
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"SEGOFF16", false, 0,0x00000000, false),
184 HOWTO(RELOC_GLOB_DAT
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"GLOB_DAT", false, 0,0x00000000, false),
185 HOWTO(RELOC_JMP_SLOT
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"JMP_SLOT", false, 0,0x00000000, false),
186 HOWTO(RELOC_RELATIVE
,0, 2, 0, false, 0, complain_overflow_bitfield
,0,"RELATIVE", false, 0,0x00000000, false),
189 /* Convert standard reloc records to "arelent" format (incl byte swap). */
191 reloc_howto_type howto_table_std
[] = {
192 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
193 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield
,0,"8", true, 0x000000ff,0x000000ff, false),
194 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield
,0,"16", true, 0x0000ffff,0x0000ffff, false),
195 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"32", true, 0xffffffff,0xffffffff, false),
196 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield
,0,"64", true, 0xdeaddead,0xdeaddead, false),
197 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed
, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
198 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed
, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
199 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed
, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
200 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed
, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
202 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield
,0,"BASE16", false,0xffffffff,0xffffffff, false),
203 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"BASE32", false,0xffffffff,0xffffffff, false),
209 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"JMP_TABLE", false, 0,0x00000000, false),
217 { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 },
218 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"RELATIVE", false, 0,0x00000000, false),
226 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield
,0,"BASEREL", false, 0,0x00000000, false),
229 #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
231 CONST
struct reloc_howto_struct
*
232 NAME(aout
,reloc_type_lookup
) (abfd
,code
)
234 bfd_reloc_code_real_type code
;
236 #define EXT(i,j) case i: return &howto_table_ext[j]
237 #define STD(i,j) case i: return &howto_table_std[j]
238 int ext
= obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
;
239 if (code
== BFD_RELOC_CTOR
)
240 switch (bfd_get_arch_info (abfd
)->bits_per_address
)
252 EXT (BFD_RELOC_32
, 2);
253 EXT (BFD_RELOC_HI22
, 8);
254 EXT (BFD_RELOC_LO10
, 11);
255 EXT (BFD_RELOC_32_PCREL_S2
, 6);
256 EXT (BFD_RELOC_SPARC_WDISP22
, 7);
257 EXT (BFD_RELOC_SPARC13
, 10);
258 EXT (BFD_RELOC_SPARC_BASE13
, 15);
259 default: return (CONST
struct reloc_howto_struct
*) 0;
265 STD (BFD_RELOC_16
, 1);
266 STD (BFD_RELOC_32
, 2);
267 STD (BFD_RELOC_8_PCREL
, 4);
268 STD (BFD_RELOC_16_PCREL
, 5);
269 STD (BFD_RELOC_32_PCREL
, 6);
270 STD (BFD_RELOC_16_BASEREL
, 9);
271 STD (BFD_RELOC_32_BASEREL
, 10);
272 default: return (CONST
struct reloc_howto_struct
*) 0;
278 Internal entry points
281 @file{aoutx.h} exports several routines for accessing the
282 contents of an a.out file, which are gathered and exported in
283 turn by various format specific files (eg sunos.c).
289 aout_@var{size}_swap_exec_header_in
292 void aout_@var{size}_swap_exec_header_in,
294 struct external_exec *raw_bytes,
295 struct internal_exec *execp);
298 Swap the information in an executable header @var{raw_bytes} taken
299 from a raw byte stream memory image into the internal exec header
300 structure @var{execp}.
303 #ifndef NAME_swap_exec_header_in
305 NAME(aout
,swap_exec_header_in
) (abfd
, raw_bytes
, execp
)
307 struct external_exec
*raw_bytes
;
308 struct internal_exec
*execp
;
310 struct external_exec
*bytes
= (struct external_exec
*)raw_bytes
;
312 /* The internal_exec structure has some fields that are unused in this
313 configuration (IE for i960), so ensure that all such uninitialized
314 fields are zero'd out. There are places where two of these structs
315 are memcmp'd, and thus the contents do matter. */
316 memset ((PTR
) execp
, 0, sizeof (struct internal_exec
));
317 /* Now fill in fields in the execp, from the bytes in the raw data. */
318 execp
->a_info
= bfd_h_get_32 (abfd
, bytes
->e_info
);
319 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
320 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
321 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
322 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
323 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
324 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
325 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
327 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
332 aout_@var{size}_swap_exec_header_out
335 void aout_@var{size}_swap_exec_header_out
337 struct internal_exec *execp,
338 struct external_exec *raw_bytes);
341 Swap the information in an internal exec header structure
342 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
345 NAME(aout
,swap_exec_header_out
) (abfd
, execp
, raw_bytes
)
347 struct internal_exec
*execp
;
348 struct external_exec
*raw_bytes
;
350 struct external_exec
*bytes
= (struct external_exec
*)raw_bytes
;
352 /* Now fill in fields in the raw data, from the fields in the exec struct. */
353 bfd_h_put_32 (abfd
, execp
->a_info
, bytes
->e_info
);
354 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
355 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
356 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
357 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
358 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
359 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
360 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
363 /* Make all the section for an a.out file. */
366 NAME(aout
,make_sections
) (abfd
)
369 if (obj_textsec (abfd
) == (asection
*) NULL
370 && bfd_make_section (abfd
, ".text") == (asection
*) NULL
)
372 if (obj_datasec (abfd
) == (asection
*) NULL
373 && bfd_make_section (abfd
, ".data") == (asection
*) NULL
)
375 if (obj_bsssec (abfd
) == (asection
*) NULL
376 && bfd_make_section (abfd
, ".bss") == (asection
*) NULL
)
383 aout_@var{size}_some_aout_object_p
386 const bfd_target *aout_@var{size}_some_aout_object_p
388 const bfd_target *(*callback_to_real_object_p)());
391 Some a.out variant thinks that the file open in @var{abfd}
392 checking is an a.out file. Do some more checking, and set up
393 for access if it really is. Call back to the calling
394 environment's "finish up" function just before returning, to
395 handle any last-minute setup.
399 NAME(aout
,some_aout_object_p
) (abfd
, execp
, callback_to_real_object_p
)
401 struct internal_exec
*execp
;
402 const bfd_target
*(*callback_to_real_object_p
) PARAMS ((bfd
*));
404 struct aout_data_struct
*rawptr
, *oldrawptr
;
405 const bfd_target
*result
;
407 rawptr
= (struct aout_data_struct
*) bfd_zalloc (abfd
, sizeof (struct aout_data_struct
));
408 if (rawptr
== NULL
) {
409 bfd_set_error (bfd_error_no_memory
);
413 oldrawptr
= abfd
->tdata
.aout_data
;
414 abfd
->tdata
.aout_data
= rawptr
;
416 /* Copy the contents of the old tdata struct.
417 In particular, we want the subformat, since for hpux it was set in
418 hp300hpux.c:swap_exec_header_in and will be used in
419 hp300hpux.c:callback. */
420 if (oldrawptr
!= NULL
)
421 *abfd
->tdata
.aout_data
= *oldrawptr
;
423 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
424 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
; /* Copy in the internal_exec struct */
425 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
427 /* Set the file flags */
428 abfd
->flags
= NO_FLAGS
;
429 if (execp
->a_drsize
|| execp
->a_trsize
)
430 abfd
->flags
|= HAS_RELOC
;
431 /* Setting of EXEC_P has been deferred to the bottom of this function */
433 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
434 if (N_DYNAMIC(*execp
))
435 abfd
->flags
|= DYNAMIC
;
437 if (N_MAGIC (*execp
) == ZMAGIC
)
439 abfd
->flags
|= D_PAGED
| WP_TEXT
;
440 adata (abfd
).magic
= z_magic
;
442 else if (N_MAGIC (*execp
) == QMAGIC
)
444 abfd
->flags
|= D_PAGED
| WP_TEXT
;
445 adata (abfd
).magic
= z_magic
;
446 adata (abfd
).subformat
= q_magic_format
;
448 else if (N_MAGIC (*execp
) == NMAGIC
)
450 abfd
->flags
|= WP_TEXT
;
451 adata (abfd
).magic
= n_magic
;
453 else if (N_MAGIC (*execp
) == OMAGIC
454 || N_MAGIC (*execp
) == BMAGIC
)
455 adata (abfd
).magic
= o_magic
;
458 /* Should have been checked with N_BADMAG before this routine
463 bfd_get_start_address (abfd
) = execp
->a_entry
;
465 obj_aout_symbols (abfd
) = (aout_symbol_type
*)NULL
;
466 bfd_get_symcount (abfd
) = execp
->a_syms
/ sizeof (struct external_nlist
);
468 /* The default relocation entry size is that of traditional V7 Unix. */
469 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
471 /* The default symbol entry size is that of traditional Unix. */
472 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
474 obj_aout_external_syms (abfd
) = NULL
;
475 obj_aout_external_strings (abfd
) = NULL
;
476 obj_aout_sym_hashes (abfd
) = NULL
;
478 if (! NAME(aout
,make_sections
) (abfd
))
481 obj_datasec (abfd
)->_raw_size
= execp
->a_data
;
482 obj_bsssec (abfd
)->_raw_size
= execp
->a_bss
;
484 obj_textsec (abfd
)->flags
=
485 (execp
->a_trsize
!= 0
486 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
487 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
488 obj_datasec (abfd
)->flags
=
489 (execp
->a_drsize
!= 0
490 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
491 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
492 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
494 #ifdef THIS_IS_ONLY_DOCUMENTATION
495 /* The common code can't fill in these things because they depend
496 on either the start address of the text segment, the rounding
497 up of virtual addresses between segments, or the starting file
498 position of the text segment -- all of which varies among different
499 versions of a.out. */
501 /* Call back to the format-dependent code to fill in the rest of the
502 fields and do any further cleanup. Things that should be filled
503 in by the callback: */
505 struct exec
*execp
= exec_hdr (abfd
);
507 obj_textsec (abfd
)->size
= N_TXTSIZE(*execp
);
508 obj_textsec (abfd
)->raw_size
= N_TXTSIZE(*execp
);
509 /* data and bss are already filled in since they're so standard */
511 /* The virtual memory addresses of the sections */
512 obj_textsec (abfd
)->vma
= N_TXTADDR(*execp
);
513 obj_datasec (abfd
)->vma
= N_DATADDR(*execp
);
514 obj_bsssec (abfd
)->vma
= N_BSSADDR(*execp
);
516 /* The file offsets of the sections */
517 obj_textsec (abfd
)->filepos
= N_TXTOFF(*execp
);
518 obj_datasec (abfd
)->filepos
= N_DATOFF(*execp
);
520 /* The file offsets of the relocation info */
521 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF(*execp
);
522 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF(*execp
);
524 /* The file offsets of the string table and symbol table. */
525 obj_str_filepos (abfd
) = N_STROFF (*execp
);
526 obj_sym_filepos (abfd
) = N_SYMOFF (*execp
);
528 /* Determine the architecture and machine type of the object file. */
529 switch (N_MACHTYPE (*exec_hdr (abfd
))) {
531 abfd
->obj_arch
= bfd_arch_obscure
;
535 adata(abfd
)->page_size
= PAGE_SIZE
;
536 adata(abfd
)->segment_size
= SEGMENT_SIZE
;
537 adata(abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
541 /* The architecture is encoded in various ways in various a.out variants,
542 or is not encoded at all in some of them. The relocation size depends
543 on the architecture and the a.out variant. Finally, the return value
544 is the bfd_target vector in use. If an error occurs, return zero and
545 set bfd_error to the appropriate error code.
547 Formats such as b.out, which have additional fields in the a.out
548 header, should cope with them in this callback as well. */
549 #endif /* DOCUMENTATION */
551 result
= (*callback_to_real_object_p
)(abfd
);
554 /* Stat the file to decide whether or not it's executable.
555 Many Mach programs use text at very unconventional addresses,
556 including the emulator, so the standard heuristic is incorrect. */
560 stat (abfd
->filename
, &st
);
561 /* Are any exec 'x' bits on? */
562 if (st
.st_mode
& 0111)
563 abfd
->flags
|= EXEC_P
;
566 /* Now that the segment addresses have been worked out, take a better
567 guess at whether the file is executable. If the entry point
568 is within the text segment, assume it is. (This makes files
569 executable even if their entry point address is 0, as long as
570 their text starts at zero.)
572 At some point we should probably break down and stat the file and
573 declare it executable if (one of) its 'x' bits are on... */
574 if ((execp
->a_entry
>= obj_textsec(abfd
)->vma
) &&
575 (execp
->a_entry
< obj_textsec(abfd
)->vma
+ obj_textsec(abfd
)->_raw_size
))
576 abfd
->flags
|= EXEC_P
;
580 #if 0 /* These should be set correctly anyways. */
581 abfd
->sections
= obj_textsec (abfd
);
582 obj_textsec (abfd
)->next
= obj_datasec (abfd
);
583 obj_datasec (abfd
)->next
= obj_bsssec (abfd
);
589 abfd
->tdata
.aout_data
= oldrawptr
;
596 aout_@var{size}_mkobject
599 boolean aout_@var{size}_mkobject, (bfd *abfd);
602 Initialize BFD @var{abfd} for use with a.out files.
606 NAME(aout
,mkobject
) (abfd
)
609 struct aout_data_struct
*rawptr
;
611 bfd_set_error (bfd_error_system_call
);
613 /* Use an intermediate variable for clarity */
614 rawptr
= (struct aout_data_struct
*)bfd_zalloc (abfd
, sizeof (struct aout_data_struct
));
616 if (rawptr
== NULL
) {
617 bfd_set_error (bfd_error_no_memory
);
621 abfd
->tdata
.aout_data
= rawptr
;
622 exec_hdr (abfd
) = &(rawptr
->e
);
624 obj_textsec (abfd
) = (asection
*)NULL
;
625 obj_datasec (abfd
) = (asection
*)NULL
;
626 obj_bsssec (abfd
) = (asection
*)NULL
;
634 aout_@var{size}_machine_type
637 enum machine_type aout_@var{size}_machine_type
638 (enum bfd_architecture arch,
639 unsigned long machine));
642 Keep track of machine architecture and machine type for
643 a.out's. Return the <<machine_type>> for a particular
644 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
645 and machine can't be represented in a.out format.
647 If the architecture is understood, machine type 0 (default)
648 is always understood.
652 NAME(aout
,machine_type
) (arch
, machine
, unknown
)
653 enum bfd_architecture arch
;
654 unsigned long machine
;
657 enum machine_type arch_flags
;
659 arch_flags
= M_UNKNOWN
;
664 if (machine
== 0) arch_flags
= M_SPARC
;
669 case 0: arch_flags
= M_68010
; break;
670 case 68000: arch_flags
= M_UNKNOWN
; *unknown
= false; break;
671 case 68010: arch_flags
= M_68010
; break;
672 case 68020: arch_flags
= M_68020
; break;
673 default: arch_flags
= M_UNKNOWN
; break;
678 if (machine
== 0) arch_flags
= M_386
;
682 if (machine
== 0) arch_flags
= M_29K
;
689 case 3000: arch_flags
= M_MIPS1
; break;
692 case 6000: arch_flags
= M_MIPS2
; break;
693 default: arch_flags
= M_UNKNOWN
; break;
698 arch_flags
= M_UNKNOWN
;
701 if (arch_flags
!= M_UNKNOWN
)
710 aout_@var{size}_set_arch_mach
713 boolean aout_@var{size}_set_arch_mach,
715 enum bfd_architecture arch,
716 unsigned long machine));
719 Set the architecture and the machine of the BFD @var{abfd} to the
720 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
721 can support the architecture required.
725 NAME(aout
,set_arch_mach
) (abfd
, arch
, machine
)
727 enum bfd_architecture arch
;
728 unsigned long machine
;
730 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
733 if (arch
!= bfd_arch_unknown
)
737 NAME(aout
,machine_type
) (arch
, machine
, &unknown
);
742 /* Determine the size of a relocation entry */
747 obj_reloc_entry_size (abfd
) = RELOC_EXT_SIZE
;
750 obj_reloc_entry_size (abfd
) = RELOC_STD_SIZE
;
754 return (*aout_backend_info(abfd
)->set_sizes
) (abfd
);
758 adjust_o_magic (abfd
, execp
)
760 struct internal_exec
*execp
;
762 file_ptr pos
= adata (abfd
).exec_bytes_size
;
767 obj_textsec(abfd
)->filepos
= pos
;
768 pos
+= obj_textsec(abfd
)->_raw_size
;
769 vma
+= obj_textsec(abfd
)->_raw_size
;
772 if (!obj_datasec(abfd
)->user_set_vma
)
774 #if 0 /* ?? Does alignment in the file image really matter? */
775 pad
= align_power (vma
, obj_datasec(abfd
)->alignment_power
) - vma
;
777 obj_textsec(abfd
)->_raw_size
+= pad
;
780 obj_datasec(abfd
)->vma
= vma
;
782 obj_datasec(abfd
)->filepos
= pos
;
783 pos
+= obj_datasec(abfd
)->_raw_size
;
784 vma
+= obj_datasec(abfd
)->_raw_size
;
787 if (!obj_bsssec(abfd
)->user_set_vma
)
790 pad
= align_power (vma
, obj_bsssec(abfd
)->alignment_power
) - vma
;
792 obj_datasec(abfd
)->_raw_size
+= pad
;
795 obj_bsssec(abfd
)->vma
= vma
;
797 obj_bsssec(abfd
)->filepos
= pos
;
799 /* Fix up the exec header. */
800 execp
->a_text
= obj_textsec(abfd
)->_raw_size
;
801 execp
->a_data
= obj_datasec(abfd
)->_raw_size
;
802 execp
->a_bss
= obj_bsssec(abfd
)->_raw_size
;
803 N_SET_MAGIC (*execp
, OMAGIC
);
807 adjust_z_magic (abfd
, execp
)
809 struct internal_exec
*execp
;
811 bfd_size_type data_pad
, text_pad
;
813 CONST
struct aout_backend_data
*abdp
;
814 int ztih
; /* Nonzero if text includes exec header. */
816 abdp
= aout_backend_info (abfd
);
820 && (abdp
->text_includes_header
821 || obj_aout_subformat (abfd
) == q_magic_format
));
822 obj_textsec(abfd
)->filepos
= (ztih
823 ? adata(abfd
).exec_bytes_size
824 : adata(abfd
).zmagic_disk_block_size
);
825 if (! obj_textsec(abfd
)->user_set_vma
)
826 /* ?? Do we really need to check for relocs here? */
827 obj_textsec(abfd
)->vma
= ((abfd
->flags
& HAS_RELOC
)
830 ? (abdp
->default_text_vma
831 + adata(abfd
).exec_bytes_size
)
832 : abdp
->default_text_vma
));
833 /* Could take strange alignment of text section into account here? */
835 /* Find start of data. */
838 text_end
= obj_textsec (abfd
)->filepos
+ obj_textsec (abfd
)->_raw_size
;
839 text_pad
= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
843 /* Note that if page_size == zmagic_disk_block_size, then
844 filepos == page_size, and this case is the same as the ztih
846 text_end
= obj_textsec (abfd
)->_raw_size
;
847 text_pad
= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
848 text_end
+= obj_textsec (abfd
)->filepos
;
850 obj_textsec(abfd
)->_raw_size
+= text_pad
;
851 text_end
+= text_pad
;
854 if (!obj_datasec(abfd
)->user_set_vma
)
857 vma
= obj_textsec(abfd
)->vma
+ obj_textsec(abfd
)->_raw_size
;
858 obj_datasec(abfd
)->vma
= BFD_ALIGN (vma
, adata(abfd
).segment_size
);
860 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
862 text_pad
= (obj_datasec(abfd
)->vma
863 - obj_textsec(abfd
)->vma
864 - obj_textsec(abfd
)->_raw_size
);
865 obj_textsec(abfd
)->_raw_size
+= text_pad
;
867 obj_datasec(abfd
)->filepos
= (obj_textsec(abfd
)->filepos
868 + obj_textsec(abfd
)->_raw_size
);
870 /* Fix up exec header while we're at it. */
871 execp
->a_text
= obj_textsec(abfd
)->_raw_size
;
872 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
873 execp
->a_text
+= adata(abfd
).exec_bytes_size
;
874 if (obj_aout_subformat (abfd
) == q_magic_format
)
875 N_SET_MAGIC (*execp
, QMAGIC
);
877 N_SET_MAGIC (*execp
, ZMAGIC
);
879 /* Spec says data section should be rounded up to page boundary. */
880 obj_datasec(abfd
)->_raw_size
881 = align_power (obj_datasec(abfd
)->_raw_size
,
882 obj_bsssec(abfd
)->alignment_power
);
883 execp
->a_data
= BFD_ALIGN (obj_datasec(abfd
)->_raw_size
,
884 adata(abfd
).page_size
);
885 data_pad
= execp
->a_data
- obj_datasec(abfd
)->_raw_size
;
888 if (!obj_bsssec(abfd
)->user_set_vma
)
889 obj_bsssec(abfd
)->vma
= (obj_datasec(abfd
)->vma
890 + obj_datasec(abfd
)->_raw_size
);
891 /* If the BSS immediately follows the data section and extra space
892 in the page is left after the data section, fudge data
893 in the header so that the bss section looks smaller by that
894 amount. We'll start the bss section there, and lie to the OS.
895 (Note that a linker script, as well as the above assignment,
896 could have explicitly set the BSS vma to immediately follow
897 the data section.) */
898 if (align_power (obj_bsssec(abfd
)->vma
, obj_bsssec(abfd
)->alignment_power
)
899 == obj_datasec(abfd
)->vma
+ obj_datasec(abfd
)->_raw_size
)
900 execp
->a_bss
= (data_pad
> obj_bsssec(abfd
)->_raw_size
) ? 0 :
901 obj_bsssec(abfd
)->_raw_size
- data_pad
;
903 execp
->a_bss
= obj_bsssec(abfd
)->_raw_size
;
907 adjust_n_magic (abfd
, execp
)
909 struct internal_exec
*execp
;
911 file_ptr pos
= adata(abfd
).exec_bytes_size
;
916 obj_textsec(abfd
)->filepos
= pos
;
917 if (!obj_textsec(abfd
)->user_set_vma
)
918 obj_textsec(abfd
)->vma
= vma
;
920 vma
= obj_textsec(abfd
)->vma
;
921 pos
+= obj_textsec(abfd
)->_raw_size
;
922 vma
+= obj_textsec(abfd
)->_raw_size
;
925 obj_datasec(abfd
)->filepos
= pos
;
926 if (!obj_datasec(abfd
)->user_set_vma
)
927 obj_datasec(abfd
)->vma
= BFD_ALIGN (vma
, adata(abfd
).segment_size
);
928 vma
= obj_datasec(abfd
)->vma
;
930 /* Since BSS follows data immediately, see if it needs alignment. */
931 vma
+= obj_datasec(abfd
)->_raw_size
;
932 pad
= align_power (vma
, obj_bsssec(abfd
)->alignment_power
) - vma
;
933 obj_datasec(abfd
)->_raw_size
+= pad
;
934 pos
+= obj_datasec(abfd
)->_raw_size
;
937 if (!obj_bsssec(abfd
)->user_set_vma
)
938 obj_bsssec(abfd
)->vma
= vma
;
940 vma
= obj_bsssec(abfd
)->vma
;
942 /* Fix up exec header. */
943 execp
->a_text
= obj_textsec(abfd
)->_raw_size
;
944 execp
->a_data
= obj_datasec(abfd
)->_raw_size
;
945 execp
->a_bss
= obj_bsssec(abfd
)->_raw_size
;
946 N_SET_MAGIC (*execp
, NMAGIC
);
950 NAME(aout
,adjust_sizes_and_vmas
) (abfd
, text_size
, text_end
)
952 bfd_size_type
*text_size
;
955 struct internal_exec
*execp
= exec_hdr (abfd
);
957 if (! NAME(aout
,make_sections
) (abfd
))
960 if (adata(abfd
).magic
!= undecided_magic
)
963 obj_textsec(abfd
)->_raw_size
=
964 align_power(obj_textsec(abfd
)->_raw_size
,
965 obj_textsec(abfd
)->alignment_power
);
967 *text_size
= obj_textsec (abfd
)->_raw_size
;
968 /* Rule (heuristic) for when to pad to a new page. Note that there
969 are (at least) two ways demand-paged (ZMAGIC) files have been
970 handled. Most Berkeley-based systems start the text segment at
971 (PAGE_SIZE). However, newer versions of SUNOS start the text
972 segment right after the exec header; the latter is counted in the
973 text segment size, and is paged in by the kernel with the rest of
976 /* This perhaps isn't the right way to do this, but made it simpler for me
977 to understand enough to implement it. Better would probably be to go
978 right from BFD flags to alignment/positioning characteristics. But the
979 old code was sloppy enough about handling the flags, and had enough
980 other magic, that it was a little hard for me to understand. I think
981 I understand it better now, but I haven't time to do the cleanup this
984 if (abfd
->flags
& D_PAGED
)
985 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
986 adata(abfd
).magic
= z_magic
;
987 else if (abfd
->flags
& WP_TEXT
)
988 adata(abfd
).magic
= n_magic
;
990 adata(abfd
).magic
= o_magic
;
992 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
994 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
996 switch (adata(abfd
).magic
) {
997 case n_magic
: str
= "NMAGIC"; break;
998 case o_magic
: str
= "OMAGIC"; break;
999 case z_magic
: str
= "ZMAGIC"; break;
1004 obj_textsec(abfd
)->vma
, obj_textsec(abfd
)->_raw_size
,
1005 obj_textsec(abfd
)->alignment_power
,
1006 obj_datasec(abfd
)->vma
, obj_datasec(abfd
)->_raw_size
,
1007 obj_datasec(abfd
)->alignment_power
,
1008 obj_bsssec(abfd
)->vma
, obj_bsssec(abfd
)->_raw_size
,
1009 obj_bsssec(abfd
)->alignment_power
);
1013 switch (adata(abfd
).magic
)
1016 adjust_o_magic (abfd
, execp
);
1019 adjust_z_magic (abfd
, execp
);
1022 adjust_n_magic (abfd
, execp
);
1028 #ifdef BFD_AOUT_DEBUG
1029 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1030 obj_textsec(abfd
)->vma
, obj_textsec(abfd
)->_raw_size
,
1031 obj_textsec(abfd
)->filepos
,
1032 obj_datasec(abfd
)->vma
, obj_datasec(abfd
)->_raw_size
,
1033 obj_datasec(abfd
)->filepos
,
1034 obj_bsssec(abfd
)->vma
, obj_bsssec(abfd
)->_raw_size
);
1042 aout_@var{size}_new_section_hook
1045 boolean aout_@var{size}_new_section_hook,
1047 asection *newsect));
1050 Called by the BFD in response to a @code{bfd_make_section}
1054 NAME(aout
,new_section_hook
) (abfd
, newsect
)
1058 /* align to double at least */
1059 newsect
->alignment_power
= bfd_get_arch_info(abfd
)->section_align_power
;
1062 if (bfd_get_format (abfd
) == bfd_object
)
1064 if (obj_textsec(abfd
) == NULL
&& !strcmp(newsect
->name
, ".text")) {
1065 obj_textsec(abfd
)= newsect
;
1066 newsect
->target_index
= N_TEXT
;
1070 if (obj_datasec(abfd
) == NULL
&& !strcmp(newsect
->name
, ".data")) {
1071 obj_datasec(abfd
) = newsect
;
1072 newsect
->target_index
= N_DATA
;
1076 if (obj_bsssec(abfd
) == NULL
&& !strcmp(newsect
->name
, ".bss")) {
1077 obj_bsssec(abfd
) = newsect
;
1078 newsect
->target_index
= N_BSS
;
1084 /* We allow more than three sections internally */
1089 NAME(aout
,set_section_contents
) (abfd
, section
, location
, offset
, count
)
1094 bfd_size_type count
;
1097 bfd_size_type text_size
;
1099 if (abfd
->output_has_begun
== false)
1101 if (NAME(aout
,adjust_sizes_and_vmas
) (abfd
,
1103 &text_end
) == false)
1107 /* regardless, once we know what we're doing, we might as well get going */
1108 if (section
!= obj_bsssec(abfd
))
1110 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0)
1114 return (bfd_write ((PTR
)location
, 1, count
, abfd
) == count
) ?
1122 /* Read the external symbols from an a.out file. */
1125 aout_get_external_symbols (abfd
)
1128 if (obj_aout_external_syms (abfd
) == (struct external_nlist
*) NULL
)
1130 bfd_size_type count
;
1131 struct external_nlist
*syms
;
1133 count
= exec_hdr (abfd
)->a_syms
/ EXTERNAL_NLIST_SIZE
;
1135 /* We allocate using malloc to make the values easy to free
1136 later on. If we put them on the obstack it might not be
1137 possible to free them. */
1138 syms
= ((struct external_nlist
*)
1139 malloc ((size_t) count
* EXTERNAL_NLIST_SIZE
));
1140 if (syms
== (struct external_nlist
*) NULL
&& count
!= 0)
1142 bfd_set_error (bfd_error_no_memory
);
1146 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1147 || (bfd_read (syms
, 1, exec_hdr (abfd
)->a_syms
, abfd
)
1148 != exec_hdr (abfd
)->a_syms
))
1154 obj_aout_external_syms (abfd
) = syms
;
1155 obj_aout_external_sym_count (abfd
) = count
;
1158 if (obj_aout_external_strings (abfd
) == NULL
1159 && exec_hdr (abfd
)->a_syms
!= 0)
1161 unsigned char string_chars
[BYTES_IN_WORD
];
1162 bfd_size_type stringsize
;
1165 /* Get the size of the strings. */
1166 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1167 || (bfd_read ((PTR
) string_chars
, BYTES_IN_WORD
, 1, abfd
)
1170 stringsize
= GET_WORD (abfd
, string_chars
);
1172 strings
= (char *) malloc ((size_t) stringsize
+ 1);
1173 if (strings
== NULL
)
1175 bfd_set_error (bfd_error_no_memory
);
1179 /* Skip space for the string count in the buffer for convenience
1180 when using indexes. */
1181 if (bfd_read (strings
+ BYTES_IN_WORD
, 1, stringsize
- BYTES_IN_WORD
,
1183 != stringsize
- BYTES_IN_WORD
)
1189 /* Sanity preservation. */
1190 strings
[stringsize
] = '\0';
1192 obj_aout_external_strings (abfd
) = strings
;
1193 obj_aout_external_string_size (abfd
) = stringsize
;
1199 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1200 and symbol->value fields of CACHE_PTR will be set from the a.out
1201 nlist structure. This function is responsible for setting
1202 symbol->flags and symbol->section, and adjusting symbol->value. */
1205 translate_from_native_sym_flags (abfd
, cache_ptr
)
1207 aout_symbol_type
*cache_ptr
;
1211 if ((cache_ptr
->type
& N_STAB
) != 0
1212 || cache_ptr
->type
== N_FN
)
1216 /* This is a debugging symbol. */
1218 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1220 /* Work out the symbol section. */
1221 switch (cache_ptr
->type
& N_TYPE
)
1225 sec
= obj_textsec (abfd
);
1228 sec
= obj_datasec (abfd
);
1231 sec
= obj_bsssec (abfd
);
1235 sec
= bfd_abs_section_ptr
;
1239 cache_ptr
->symbol
.section
= sec
;
1240 cache_ptr
->symbol
.value
-= sec
->vma
;
1245 /* Get the default visibility. This does not apply to all types, so
1246 we just hold it in a local variable to use if wanted. */
1247 if ((cache_ptr
->type
& N_EXT
) == 0)
1248 visible
= BSF_LOCAL
;
1250 visible
= BSF_GLOBAL
;
1252 switch (cache_ptr
->type
)
1255 case N_ABS
: case N_ABS
| N_EXT
:
1256 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1257 cache_ptr
->symbol
.flags
= visible
;
1260 case N_UNDF
| N_EXT
:
1261 if (cache_ptr
->symbol
.value
!= 0)
1263 /* This is a common symbol. */
1264 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1265 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1269 cache_ptr
->symbol
.flags
= 0;
1270 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1274 case N_TEXT
: case N_TEXT
| N_EXT
:
1275 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1276 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1277 cache_ptr
->symbol
.flags
= visible
;
1280 /* N_SETV symbols used to represent set vectors placed in the
1281 data section. They are no longer generated. Theoretically,
1282 it was possible to extract the entries and combine them with
1283 new ones, although I don't know if that was ever actually
1284 done. Unless that feature is restored, treat them as data
1286 case N_SETV
: case N_SETV
| N_EXT
:
1287 case N_DATA
: case N_DATA
| N_EXT
:
1288 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1289 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1290 cache_ptr
->symbol
.flags
= visible
;
1293 case N_BSS
: case N_BSS
| N_EXT
:
1294 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1295 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1296 cache_ptr
->symbol
.flags
= visible
;
1299 case N_SETA
: case N_SETA
| N_EXT
:
1300 case N_SETT
: case N_SETT
| N_EXT
:
1301 case N_SETD
: case N_SETD
| N_EXT
:
1302 case N_SETB
: case N_SETB
| N_EXT
:
1305 arelent_chain
*reloc
;
1306 asection
*into_section
;
1308 /* This is a set symbol. The name of the symbol is the name
1309 of the set (e.g., __CTOR_LIST__). The value of the symbol
1310 is the value to add to the set. We create a section with
1311 the same name as the symbol, and add a reloc to insert the
1312 appropriate value into the section.
1314 This action is actually obsolete; it used to make the
1315 linker do the right thing, but the linker no longer uses
1318 section
= bfd_get_section_by_name (abfd
, cache_ptr
->symbol
.name
);
1319 if (section
== NULL
)
1323 copy
= bfd_alloc (abfd
, strlen (cache_ptr
->symbol
.name
) + 1);
1326 bfd_set_error (bfd_error_no_memory
);
1330 strcpy (copy
, cache_ptr
->symbol
.name
);
1331 section
= bfd_make_section (abfd
, copy
);
1332 if (section
== NULL
)
1336 reloc
= (arelent_chain
*) bfd_alloc (abfd
, sizeof (arelent_chain
));
1339 bfd_set_error (bfd_error_no_memory
);
1343 /* Build a relocation entry for the constructor. */
1344 switch (cache_ptr
->type
& N_TYPE
)
1347 into_section
= bfd_abs_section_ptr
;
1348 cache_ptr
->type
= N_ABS
;
1351 into_section
= obj_textsec (abfd
);
1352 cache_ptr
->type
= N_TEXT
;
1355 into_section
= obj_datasec (abfd
);
1356 cache_ptr
->type
= N_DATA
;
1359 into_section
= obj_bsssec (abfd
);
1360 cache_ptr
->type
= N_BSS
;
1364 /* Build a relocation pointing into the constructor section
1365 pointing at the symbol in the set vector specified. */
1366 reloc
->relent
.addend
= cache_ptr
->symbol
.value
;
1367 cache_ptr
->symbol
.section
= into_section
;
1368 reloc
->relent
.sym_ptr_ptr
= into_section
->symbol_ptr_ptr
;
1370 /* We modify the symbol to belong to a section depending upon
1371 the name of the symbol, and add to the size of the section
1372 to contain a pointer to the symbol. Build a reloc entry to
1373 relocate to this symbol attached to this section. */
1374 section
->flags
= SEC_CONSTRUCTOR
| SEC_RELOC
;
1376 section
->reloc_count
++;
1377 section
->alignment_power
= 2;
1379 reloc
->next
= section
->constructor_chain
;
1380 section
->constructor_chain
= reloc
;
1381 reloc
->relent
.address
= section
->_raw_size
;
1382 section
->_raw_size
+= BYTES_IN_WORD
;
1384 if (obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
)
1385 reloc
->relent
.howto
= howto_table_ext
+ CTOR_TABLE_RELOC_IDX
;
1387 reloc
->relent
.howto
= howto_table_std
+ CTOR_TABLE_RELOC_IDX
;
1389 cache_ptr
->symbol
.flags
|= BSF_CONSTRUCTOR
;
1394 /* This symbol is the text of a warning message. The next
1395 symbol is the symbol to associate the warning with. If a
1396 reference is made to that symbol, a warning is issued. */
1397 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_WARNING
;
1399 /* @@ Stuffing pointers into integers is a no-no. We can
1400 usually get away with it if the integer is large enough
1402 if (sizeof (cache_ptr
+ 1) > sizeof (bfd_vma
))
1404 cache_ptr
->symbol
.value
= (bfd_vma
) (cache_ptr
+ 1);
1406 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1410 case N_INDR
: case N_INDR
| N_EXT
:
1411 /* An indirect symbol. This consists of two symbols in a row.
1412 The first symbol is the name of the indirection. The second
1413 symbol is the name of the target. A reference to the first
1414 symbol becomes a reference to the second. */
1415 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
| BSF_INDIRECT
| visible
;
1417 /* @@ Stuffing pointers into integers is a no-no. We can
1418 usually get away with it if the integer is large enough
1420 if (sizeof (cache_ptr
+ 1) > sizeof (bfd_vma
))
1422 cache_ptr
->symbol
.value
= (bfd_vma
) (cache_ptr
+ 1);
1424 cache_ptr
->symbol
.section
= bfd_ind_section_ptr
;
1429 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1430 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1434 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1435 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1439 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1440 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1441 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1445 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1446 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1447 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1451 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1452 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1453 cache_ptr
->symbol
.flags
= BSF_WEAK
;
1460 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1463 translate_to_native_sym_flags (abfd
, cache_ptr
, sym_pointer
)
1466 struct external_nlist
*sym_pointer
;
1468 bfd_vma value
= cache_ptr
->value
;
1470 /* Mask out any existing type bits in case copying from one section
1472 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1474 if (bfd_is_abs_section (bfd_get_section (cache_ptr
)))
1475 sym_pointer
->e_type
[0] |= N_ABS
;
1476 else if (bfd_get_section (cache_ptr
) == obj_textsec (abfd
)
1477 || (bfd_get_section (cache_ptr
)->output_section
1478 == obj_textsec (abfd
)))
1479 sym_pointer
->e_type
[0] |= N_TEXT
;
1480 else if (bfd_get_section (cache_ptr
) == obj_datasec (abfd
)
1481 || (bfd_get_section (cache_ptr
)->output_section
1482 == obj_datasec (abfd
)))
1483 sym_pointer
->e_type
[0] |= N_DATA
;
1484 else if (bfd_get_section (cache_ptr
) == obj_bsssec (abfd
)
1485 || (bfd_get_section (cache_ptr
)->output_section
1486 == obj_bsssec (abfd
)))
1487 sym_pointer
->e_type
[0] |= N_BSS
;
1488 else if (bfd_get_section (cache_ptr
) == NULL
)
1490 /* Protect the bfd_is_com_section call. This case occurs, e.g.,
1491 for the *DEBUG* section of a COFF file. */
1492 bfd_set_error (bfd_error_nonrepresentable_section
);
1495 else if (bfd_is_und_section (bfd_get_section (cache_ptr
)))
1496 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1497 else if (bfd_is_ind_section (bfd_get_section (cache_ptr
)))
1498 sym_pointer
->e_type
[0] = N_INDR
;
1499 else if (bfd_is_com_section (bfd_get_section (cache_ptr
)))
1500 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1503 bfd_set_error (bfd_error_nonrepresentable_section
);
1507 /* Turn the symbol from section relative to absolute again */
1508 value
+= cache_ptr
->section
->vma
;
1510 if ((cache_ptr
->flags
& BSF_WARNING
) != 0)
1511 sym_pointer
->e_type
[0] = N_WARNING
;
1513 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1514 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1515 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1516 sym_pointer
->e_type
[0] |= N_EXT
;
1518 if ((cache_ptr
->flags
& BSF_CONSTRUCTOR
) != 0)
1520 int type
= ((aout_symbol_type
*) cache_ptr
)->type
;
1523 case N_ABS
: type
= N_SETA
; break;
1524 case N_TEXT
: type
= N_SETT
; break;
1525 case N_DATA
: type
= N_SETD
; break;
1526 case N_BSS
: type
= N_SETB
; break;
1528 sym_pointer
->e_type
[0] = type
;
1531 if ((cache_ptr
->flags
& BSF_WEAK
) != 0)
1535 switch (sym_pointer
->e_type
[0] & N_TYPE
)
1538 case N_ABS
: type
= N_WEAKA
; break;
1539 case N_TEXT
: type
= N_WEAKT
; break;
1540 case N_DATA
: type
= N_WEAKD
; break;
1541 case N_BSS
: type
= N_WEAKB
; break;
1542 case N_UNDF
: type
= N_WEAKU
; break;
1544 sym_pointer
->e_type
[0] = type
;
1547 PUT_WORD(abfd
, value
, sym_pointer
->e_value
);
1552 /* Native-level interface to symbols. */
1555 NAME(aout
,make_empty_symbol
) (abfd
)
1558 aout_symbol_type
*new =
1559 (aout_symbol_type
*)bfd_zalloc (abfd
, sizeof (aout_symbol_type
));
1562 bfd_set_error (bfd_error_no_memory
);
1565 new->symbol
.the_bfd
= abfd
;
1567 return &new->symbol
;
1570 /* Translate a set of internal symbols into external symbols. */
1573 NAME(aout
,translate_symbol_table
) (abfd
, in
, ext
, count
, str
, strsize
, dynamic
)
1575 aout_symbol_type
*in
;
1576 struct external_nlist
*ext
;
1577 bfd_size_type count
;
1579 bfd_size_type strsize
;
1582 struct external_nlist
*ext_end
;
1584 ext_end
= ext
+ count
;
1585 for (; ext
< ext_end
; ext
++, in
++)
1589 x
= GET_WORD (abfd
, ext
->e_strx
);
1590 in
->symbol
.the_bfd
= abfd
;
1592 /* For the normal symbols, the zero index points at the number
1593 of bytes in the string table but is to be interpreted as the
1594 null string. For the dynamic symbols, the number of bytes in
1595 the string table is stored in the __DYNAMIC structure and the
1596 zero index points at an actual string. */
1597 if (x
== 0 && ! dynamic
)
1598 in
->symbol
.name
= "";
1599 else if (x
< strsize
)
1600 in
->symbol
.name
= str
+ x
;
1604 in
->symbol
.value
= GET_SWORD (abfd
, ext
->e_value
);
1605 in
->desc
= bfd_h_get_16 (abfd
, ext
->e_desc
);
1606 in
->other
= bfd_h_get_8 (abfd
, ext
->e_other
);
1607 in
->type
= bfd_h_get_8 (abfd
, ext
->e_type
);
1608 in
->symbol
.udata
= 0;
1610 if (! translate_from_native_sym_flags (abfd
, in
))
1614 in
->symbol
.flags
|= BSF_DYNAMIC
;
1620 /* We read the symbols into a buffer, which is discarded when this
1621 function exits. We read the strings into a buffer large enough to
1622 hold them all plus all the cached symbol entries. */
1625 NAME(aout
,slurp_symbol_table
) (abfd
)
1628 struct external_nlist
*old_external_syms
;
1629 aout_symbol_type
*cached
;
1632 /* If there's no work to be done, don't do any */
1633 if (obj_aout_symbols (abfd
) != (aout_symbol_type
*) NULL
)
1636 old_external_syms
= obj_aout_external_syms (abfd
);
1638 if (! aout_get_external_symbols (abfd
))
1641 if (obj_aout_external_sym_count (abfd
) == 0)
1643 bfd_set_error (bfd_error_no_symbols
);
1647 cached_size
= (obj_aout_external_sym_count (abfd
)
1648 * sizeof (aout_symbol_type
));
1649 cached
= (aout_symbol_type
*) malloc (cached_size
);
1652 bfd_set_error (bfd_error_no_memory
);
1655 memset (cached
, 0, cached_size
);
1657 /* Convert from external symbol information to internal. */
1658 if (! (NAME(aout
,translate_symbol_table
)
1660 obj_aout_external_syms (abfd
),
1661 obj_aout_external_sym_count (abfd
),
1662 obj_aout_external_strings (abfd
),
1663 obj_aout_external_string_size (abfd
),
1670 bfd_get_symcount (abfd
) = obj_aout_external_sym_count (abfd
);
1672 obj_aout_symbols (abfd
) = cached
;
1674 /* It is very likely that anybody who calls this function will not
1675 want the external symbol information, so if it was allocated
1676 because of our call to aout_get_external_symbols, we free it up
1677 right away to save space. */
1678 if (old_external_syms
== (struct external_nlist
*) NULL
1679 && obj_aout_external_syms (abfd
) != (struct external_nlist
*) NULL
)
1681 free (obj_aout_external_syms (abfd
));
1682 obj_aout_external_syms (abfd
) = NULL
;
1688 /* We use a hash table when writing out symbols so that we only write
1689 out a particular string once. This helps particularly when the
1690 linker writes out stabs debugging entries, because each different
1691 contributing object file tends to have many duplicate stabs
1694 Possible improvements:
1695 + look for strings matching trailing substrings of other strings
1696 + better data structures? balanced trees?
1697 + look at reducing memory use elsewhere -- maybe if we didn't have
1698 to construct the entire symbol table at once, we could get by
1699 with smaller amounts of VM? (What effect does that have on the
1700 string table reductions?)
1702 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1703 if BFD_TRADITIONAL_FORMAT is set. */
1705 /* An entry in the strtab hash table. */
1707 struct strtab_hash_entry
1709 struct bfd_hash_entry root
;
1710 /* Index in string table. */
1711 bfd_size_type index
;
1712 /* Next string in strtab. */
1713 struct strtab_hash_entry
*next
;
1716 /* The strtab hash table. */
1720 struct bfd_hash_table table
;
1721 /* Size of strtab--also next available index. */
1723 /* First string in strtab. */
1724 struct strtab_hash_entry
*first
;
1725 /* Last string in strtab. */
1726 struct strtab_hash_entry
*last
;
1729 static struct bfd_hash_entry
*strtab_hash_newfunc
1730 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
1731 static boolean stringtab_init
PARAMS ((struct strtab_hash
*));
1732 static bfd_size_type add_to_stringtab
1733 PARAMS ((bfd
*, struct strtab_hash
*, const char *, boolean
));
1734 static boolean emit_stringtab
PARAMS ((bfd
*, struct strtab_hash
*));
1736 /* Routine to create an entry in a strtab. */
1738 static struct bfd_hash_entry
*
1739 strtab_hash_newfunc (entry
, table
, string
)
1740 struct bfd_hash_entry
*entry
;
1741 struct bfd_hash_table
*table
;
1744 struct strtab_hash_entry
*ret
= (struct strtab_hash_entry
*) entry
;
1746 /* Allocate the structure if it has not already been allocated by a
1748 if (ret
== (struct strtab_hash_entry
*) NULL
)
1749 ret
= ((struct strtab_hash_entry
*)
1750 bfd_hash_allocate (table
, sizeof (struct strtab_hash_entry
)));
1751 if (ret
== (struct strtab_hash_entry
*) NULL
)
1753 bfd_set_error (bfd_error_no_memory
);
1757 /* Call the allocation method of the superclass. */
1758 ret
= ((struct strtab_hash_entry
*)
1759 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
1763 /* Initialize the local fields. */
1764 ret
->index
= (bfd_size_type
) -1;
1768 return (struct bfd_hash_entry
*) ret
;
1771 /* Look up an entry in an strtab. */
1773 #define strtab_hash_lookup(t, string, create, copy) \
1774 ((struct strtab_hash_entry *) \
1775 bfd_hash_lookup (&(t)->table, (string), (create), (copy)))
1777 /* Create a new strtab. */
1780 stringtab_init (table
)
1781 struct strtab_hash
*table
;
1783 if (! bfd_hash_table_init (&table
->table
, strtab_hash_newfunc
))
1786 /* Leave space for the size of the string table. */
1787 table
->size
= BYTES_IN_WORD
;
1789 table
->first
= NULL
;
1795 /* Free a strtab. */
1797 #define stringtab_free(tab) bfd_hash_table_free (&(tab)->table)
1799 /* Get the index of a string in a strtab, adding it if it is not
1800 already present. If HASH is false, we don't really use the hash
1801 table, and we don't eliminate duplicate strings. */
1803 static INLINE bfd_size_type
1804 add_to_stringtab (abfd
, tab
, str
, copy
)
1806 struct strtab_hash
*tab
;
1810 register struct strtab_hash_entry
*entry
;
1812 /* An index of 0 always means the empty string. */
1816 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) == 0)
1818 entry
= strtab_hash_lookup (tab
, str
, true, copy
);
1820 return (bfd_size_type
) -1;
1824 entry
= ((struct strtab_hash_entry
*)
1825 bfd_hash_allocate (&tab
->table
,
1826 sizeof (struct strtab_hash_entry
)));
1828 return (bfd_size_type
) -1;
1830 entry
->root
.string
= str
;
1835 n
= (char *) bfd_hash_allocate (&tab
->table
, strlen (str
) + 1);
1837 return (bfd_size_type
) -1;
1838 entry
->root
.string
= n
;
1840 entry
->index
= (bfd_size_type
) -1;
1844 if (entry
->index
== (bfd_size_type
) -1)
1846 entry
->index
= tab
->size
;
1847 tab
->size
+= strlen (str
) + 1;
1848 if (tab
->first
== NULL
)
1851 tab
->last
->next
= entry
;
1855 return entry
->index
;
1858 /* Write out a strtab. ABFD is already at the right location in the
1862 emit_stringtab (abfd
, tab
)
1864 struct strtab_hash
*tab
;
1866 bfd_byte buffer
[BYTES_IN_WORD
];
1867 register struct strtab_hash_entry
*entry
;
1869 PUT_WORD (abfd
, tab
->size
, buffer
);
1870 if (bfd_write ((PTR
) buffer
, 1, BYTES_IN_WORD
, abfd
) != BYTES_IN_WORD
)
1873 for (entry
= tab
->first
; entry
!= NULL
; entry
= entry
->next
)
1875 register const char *str
;
1876 register size_t len
;
1878 str
= entry
->root
.string
;
1879 len
= strlen (str
) + 1;
1880 if (bfd_write ((PTR
) str
, 1, len
, abfd
) != len
)
1888 NAME(aout
,write_syms
) (abfd
)
1891 unsigned int count
;
1892 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1893 struct strtab_hash strtab
;
1895 if (! stringtab_init (&strtab
))
1898 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1900 asymbol
*g
= generic
[count
];
1902 struct external_nlist nsp
;
1904 indx
= add_to_stringtab (abfd
, &strtab
, g
->name
, false);
1905 if (indx
== (bfd_size_type
) -1)
1907 PUT_WORD (abfd
, indx
, (bfd_byte
*) nsp
.e_strx
);
1909 if (bfd_asymbol_flavour(g
) == abfd
->xvec
->flavour
)
1911 bfd_h_put_16(abfd
, aout_symbol(g
)->desc
, nsp
.e_desc
);
1912 bfd_h_put_8(abfd
, aout_symbol(g
)->other
, nsp
.e_other
);
1913 bfd_h_put_8(abfd
, aout_symbol(g
)->type
, nsp
.e_type
);
1917 bfd_h_put_16(abfd
,0, nsp
.e_desc
);
1918 bfd_h_put_8(abfd
, 0, nsp
.e_other
);
1919 bfd_h_put_8(abfd
, 0, nsp
.e_type
);
1922 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1925 if (bfd_write((PTR
)&nsp
,1,EXTERNAL_NLIST_SIZE
, abfd
)
1926 != EXTERNAL_NLIST_SIZE
)
1929 /* NB: `KEEPIT' currently overlays `flags', so set this only
1930 here, at the end. */
1934 if (! emit_stringtab (abfd
, &strtab
))
1937 stringtab_free (&strtab
);
1942 stringtab_free (&strtab
);
1948 NAME(aout
,get_symtab
) (abfd
, location
)
1952 unsigned int counter
= 0;
1953 aout_symbol_type
*symbase
;
1955 if (!NAME(aout
,slurp_symbol_table
)(abfd
))
1958 for (symbase
= obj_aout_symbols(abfd
); counter
++ < bfd_get_symcount (abfd
);)
1959 *(location
++) = (asymbol
*)( symbase
++);
1961 return bfd_get_symcount (abfd
);
1965 /* Standard reloc stuff */
1966 /* Output standard relocation information to a file in target byte order. */
1969 NAME(aout
,swap_std_reloc_out
) (abfd
, g
, natptr
)
1972 struct reloc_std_external
*natptr
;
1975 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1977 unsigned int r_length
;
1979 int r_baserel
, r_jmptable
, r_relative
;
1980 asection
*output_section
= sym
->section
->output_section
;
1982 PUT_WORD(abfd
, g
->address
, natptr
->r_address
);
1984 r_length
= g
->howto
->size
; /* Size as a power of two */
1985 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
1986 /* XXX This relies on relocs coming from a.out files. */
1987 r_baserel
= (g
->howto
->type
& 8) != 0;
1988 r_jmptable
= (g
->howto
->type
& 16) != 0;
1989 r_relative
= (g
->howto
->type
& 32) != 0;
1992 /* For a standard reloc, the addend is in the object file. */
1993 r_addend
= g
->addend
+ (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
1996 /* name was clobbered by aout_write_syms to be symbol index */
1998 /* If this relocation is relative to a symbol then set the
1999 r_index to the symbols index, and the r_extern bit.
2001 Absolute symbols can come in in two ways, either as an offset
2002 from the abs section, or as a symbol which has an abs value.
2007 if (bfd_is_com_section (output_section
)
2008 || bfd_is_abs_section (output_section
)
2009 || bfd_is_und_section (output_section
))
2011 if (bfd_abs_section_ptr
->symbol
== sym
)
2013 /* Whoops, looked like an abs symbol, but is really an offset
2014 from the abs section */
2020 /* Fill in symbol */
2022 r_index
= stoi((*(g
->sym_ptr_ptr
))->KEEPIT
);
2028 /* Just an ordinary section */
2030 r_index
= output_section
->target_index
;
2033 /* now the fun stuff */
2034 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2035 natptr
->r_index
[0] = r_index
>> 16;
2036 natptr
->r_index
[1] = r_index
>> 8;
2037 natptr
->r_index
[2] = r_index
;
2039 (r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
2040 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
2041 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
2042 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
2043 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
2044 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
);
2046 natptr
->r_index
[2] = r_index
>> 16;
2047 natptr
->r_index
[1] = r_index
>> 8;
2048 natptr
->r_index
[0] = r_index
;
2050 (r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
2051 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
2052 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
2053 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
2054 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
2055 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
);
2060 /* Extended stuff */
2061 /* Output extended relocation information to a file in target byte order. */
2064 NAME(aout
,swap_ext_reloc_out
) (abfd
, g
, natptr
)
2067 register struct reloc_ext_external
*natptr
;
2071 unsigned int r_type
;
2072 unsigned int r_addend
;
2073 asymbol
*sym
= *(g
->sym_ptr_ptr
);
2074 asection
*output_section
= sym
->section
->output_section
;
2076 PUT_WORD (abfd
, g
->address
, natptr
->r_address
);
2078 r_type
= (unsigned int) g
->howto
->type
;
2080 r_addend
= g
->addend
+ (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
2082 /* If this relocation is relative to a symbol then set the
2083 r_index to the symbols index, and the r_extern bit.
2085 Absolute symbols can come in in two ways, either as an offset
2086 from the abs section, or as a symbol which has an abs value.
2087 check for that here. */
2089 if (bfd_is_com_section (output_section
)
2090 || bfd_is_abs_section (output_section
)
2091 || bfd_is_und_section (output_section
))
2093 if (bfd_abs_section_ptr
->symbol
== sym
)
2095 /* Whoops, looked like an abs symbol, but is really an offset
2096 from the abs section */
2103 r_index
= stoi((*(g
->sym_ptr_ptr
))->KEEPIT
);
2108 /* Just an ordinary section */
2110 r_index
= output_section
->target_index
;
2113 /* now the fun stuff */
2114 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2115 natptr
->r_index
[0] = r_index
>> 16;
2116 natptr
->r_index
[1] = r_index
>> 8;
2117 natptr
->r_index
[2] = r_index
;
2119 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
2120 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
2122 natptr
->r_index
[2] = r_index
>> 16;
2123 natptr
->r_index
[1] = r_index
>> 8;
2124 natptr
->r_index
[0] = r_index
;
2126 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
2127 | (r_type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
2130 PUT_WORD (abfd
, r_addend
, natptr
->r_addend
);
2133 /* BFD deals internally with all things based from the section they're
2134 in. so, something in 10 bytes into a text section with a base of
2135 50 would have a symbol (.text+10) and know .text vma was 50.
2137 Aout keeps all it's symbols based from zero, so the symbol would
2138 contain 60. This macro subs the base of each section from the value
2139 to give the true offset from the section */
2142 #define MOVE_ADDRESS(ad) \
2144 /* undefined symbol */ \
2145 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2146 cache_ptr->addend = ad; \
2148 /* defined, section relative. replace symbol with pointer to \
2149 symbol which points to section */ \
2150 switch (r_index) { \
2152 case N_TEXT | N_EXT: \
2153 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2154 cache_ptr->addend = ad - su->textsec->vma; \
2157 case N_DATA | N_EXT: \
2158 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2159 cache_ptr->addend = ad - su->datasec->vma; \
2162 case N_BSS | N_EXT: \
2163 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2164 cache_ptr->addend = ad - su->bsssec->vma; \
2168 case N_ABS | N_EXT: \
2169 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2170 cache_ptr->addend = ad; \
2176 NAME(aout
,swap_ext_reloc_in
) (abfd
, bytes
, cache_ptr
, symbols
)
2178 struct reloc_ext_external
*bytes
;
2184 unsigned int r_type
;
2185 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2187 cache_ptr
->address
= (GET_SWORD (abfd
, bytes
->r_address
));
2189 /* now the fun stuff */
2190 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2191 r_index
= (bytes
->r_index
[0] << 16)
2192 | (bytes
->r_index
[1] << 8)
2193 | bytes
->r_index
[2];
2194 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
2195 r_type
= (bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
2196 >> RELOC_EXT_BITS_TYPE_SH_BIG
;
2198 r_index
= (bytes
->r_index
[2] << 16)
2199 | (bytes
->r_index
[1] << 8)
2200 | bytes
->r_index
[0];
2201 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
2202 r_type
= (bytes
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
2203 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
;
2206 cache_ptr
->howto
= howto_table_ext
+ r_type
;
2207 MOVE_ADDRESS(GET_SWORD(abfd
, bytes
->r_addend
));
2211 NAME(aout
,swap_std_reloc_in
) (abfd
, bytes
, cache_ptr
, symbols
)
2213 struct reloc_std_external
*bytes
;
2219 unsigned int r_length
;
2221 int r_baserel
, r_jmptable
, r_relative
;
2222 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
2225 cache_ptr
->address
= bfd_h_get_32 (abfd
, bytes
->r_address
);
2227 /* now the fun stuff */
2228 if (abfd
->xvec
->header_byteorder_big_p
!= false) {
2229 r_index
= (bytes
->r_index
[0] << 16)
2230 | (bytes
->r_index
[1] << 8)
2231 | bytes
->r_index
[2];
2232 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
2233 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
2234 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
2235 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
2236 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
2237 r_length
= (bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
2238 >> RELOC_STD_BITS_LENGTH_SH_BIG
;
2240 r_index
= (bytes
->r_index
[2] << 16)
2241 | (bytes
->r_index
[1] << 8)
2242 | bytes
->r_index
[0];
2243 r_extern
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
2244 r_pcrel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
2245 r_baserel
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
2246 r_jmptable
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
2247 r_relative
= (0 != (bytes
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
2248 r_length
= (bytes
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
2249 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
;
2252 howto_idx
= r_length
+ 4 * r_pcrel
+ 8 * r_baserel
2253 + 16 * r_jmptable
+ 32 * r_relative
;
2254 BFD_ASSERT (howto_idx
< TABLE_SIZE (howto_table_std
));
2255 cache_ptr
->howto
= howto_table_std
+ howto_idx
;
2256 BFD_ASSERT (cache_ptr
->howto
->type
!= -1);
2261 /* Read and swap the relocs for a section. */
2264 NAME(aout
,slurp_reloc_table
) (abfd
, asect
, symbols
)
2270 bfd_size_type reloc_size
;
2272 arelent
*reloc_cache
;
2274 unsigned int counter
= 0;
2277 if (asect
->relocation
)
2280 if (asect
->flags
& SEC_CONSTRUCTOR
)
2283 if (asect
== obj_datasec (abfd
))
2284 reloc_size
= exec_hdr(abfd
)->a_drsize
;
2285 else if (asect
== obj_textsec (abfd
))
2286 reloc_size
= exec_hdr(abfd
)->a_trsize
;
2289 bfd_set_error (bfd_error_invalid_operation
);
2293 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
2296 each_size
= obj_reloc_entry_size (abfd
);
2298 count
= reloc_size
/ each_size
;
2300 reloc_cache
= (arelent
*) malloc ((size_t) (count
* sizeof (arelent
)));
2301 if (reloc_cache
== NULL
&& count
!= 0)
2303 bfd_set_error (bfd_error_no_memory
);
2306 memset (reloc_cache
, 0, count
* sizeof (arelent
));
2308 relocs
= malloc (reloc_size
);
2309 if (relocs
== NULL
&& reloc_size
!= 0)
2312 bfd_set_error (bfd_error_no_memory
);
2316 if (bfd_read (relocs
, 1, reloc_size
, abfd
) != reloc_size
)
2323 cache_ptr
= reloc_cache
;
2324 if (each_size
== RELOC_EXT_SIZE
)
2326 register struct reloc_ext_external
*rptr
=
2327 (struct reloc_ext_external
*) relocs
;
2329 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2330 NAME(aout
,swap_ext_reloc_in
) (abfd
, rptr
, cache_ptr
, symbols
);
2334 register struct reloc_std_external
*rptr
=
2335 (struct reloc_std_external
*) relocs
;
2337 for (; counter
< count
; counter
++, rptr
++, cache_ptr
++)
2338 NAME(aout
,swap_std_reloc_in
) (abfd
, rptr
, cache_ptr
, symbols
);
2343 asect
->relocation
= reloc_cache
;
2344 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2349 /* Write out a relocation section into an object file. */
2352 NAME(aout
,squirt_out_relocs
) (abfd
, section
)
2357 unsigned char *native
, *natptr
;
2360 unsigned int count
= section
->reloc_count
;
2363 if (count
== 0) return true;
2365 each_size
= obj_reloc_entry_size (abfd
);
2366 natsize
= each_size
* count
;
2367 native
= (unsigned char *) bfd_zalloc (abfd
, natsize
);
2369 bfd_set_error (bfd_error_no_memory
);
2373 generic
= section
->orelocation
;
2375 if (each_size
== RELOC_EXT_SIZE
)
2377 for (natptr
= native
;
2379 --count
, natptr
+= each_size
, ++generic
)
2380 NAME(aout
,swap_ext_reloc_out
) (abfd
, *generic
, (struct reloc_ext_external
*)natptr
);
2384 for (natptr
= native
;
2386 --count
, natptr
+= each_size
, ++generic
)
2387 NAME(aout
,swap_std_reloc_out
)(abfd
, *generic
, (struct reloc_std_external
*)natptr
);
2390 if ( bfd_write ((PTR
) native
, 1, natsize
, abfd
) != natsize
) {
2391 bfd_release(abfd
, native
);
2394 bfd_release (abfd
, native
);
2399 /* This is stupid. This function should be a boolean predicate */
2401 NAME(aout
,canonicalize_reloc
) (abfd
, section
, relptr
, symbols
)
2407 arelent
*tblptr
= section
->relocation
;
2410 if (section
== obj_bsssec (abfd
))
2416 if (!(tblptr
|| NAME(aout
,slurp_reloc_table
)(abfd
, section
, symbols
)))
2419 if (section
->flags
& SEC_CONSTRUCTOR
) {
2420 arelent_chain
*chain
= section
->constructor_chain
;
2421 for (count
= 0; count
< section
->reloc_count
; count
++) {
2422 *relptr
++ = &chain
->relent
;
2423 chain
= chain
->next
;
2427 tblptr
= section
->relocation
;
2429 for (count
= 0; count
++ < section
->reloc_count
;)
2431 *relptr
++ = tblptr
++;
2436 return section
->reloc_count
;
2440 NAME(aout
,get_reloc_upper_bound
) (abfd
, asect
)
2444 if (bfd_get_format (abfd
) != bfd_object
) {
2445 bfd_set_error (bfd_error_invalid_operation
);
2448 if (asect
->flags
& SEC_CONSTRUCTOR
) {
2449 return (sizeof (arelent
*) * (asect
->reloc_count
+1));
2452 if (asect
== obj_datasec (abfd
))
2453 return (sizeof (arelent
*)
2454 * ((exec_hdr(abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
))
2457 if (asect
== obj_textsec (abfd
))
2458 return (sizeof (arelent
*)
2459 * ((exec_hdr(abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
))
2462 if (asect
== obj_bsssec (abfd
))
2463 return sizeof (arelent
*);
2465 bfd_set_error (bfd_error_invalid_operation
);
2471 NAME(aout
,get_symtab_upper_bound
) (abfd
)
2474 if (!NAME(aout
,slurp_symbol_table
)(abfd
))
2477 return (bfd_get_symcount (abfd
)+1) * (sizeof (aout_symbol_type
*));
2482 NAME(aout
,get_lineno
) (ignore_abfd
, ignore_symbol
)
2484 asymbol
*ignore_symbol
;
2486 return (alent
*)NULL
;
2491 NAME(aout
,get_symbol_info
) (ignore_abfd
, symbol
, ret
)
2496 bfd_symbol_info (symbol
, ret
);
2498 if (ret
->type
== '?')
2500 int type_code
= aout_symbol(symbol
)->type
& 0xff;
2501 CONST
char *stab_name
= aout_stab_name(type_code
);
2502 static char buf
[10];
2504 if (stab_name
== NULL
)
2506 sprintf(buf
, "(%d)", type_code
);
2510 ret
->stab_other
= (unsigned)(aout_symbol(symbol
)->other
& 0xff);
2511 ret
->stab_desc
= (unsigned)(aout_symbol(symbol
)->desc
& 0xffff);
2512 ret
->stab_name
= stab_name
;
2518 NAME(aout
,print_symbol
) (ignore_abfd
, afile
, symbol
, how
)
2522 bfd_print_symbol_type how
;
2524 FILE *file
= (FILE *)afile
;
2527 case bfd_print_symbol_name
:
2529 fprintf(file
,"%s", symbol
->name
);
2531 case bfd_print_symbol_more
:
2532 fprintf(file
,"%4x %2x %2x",(unsigned)(aout_symbol(symbol
)->desc
& 0xffff),
2533 (unsigned)(aout_symbol(symbol
)->other
& 0xff),
2534 (unsigned)(aout_symbol(symbol
)->type
));
2536 case bfd_print_symbol_all
:
2538 CONST
char *section_name
= symbol
->section
->name
;
2541 bfd_print_symbol_vandf((PTR
)file
,symbol
);
2543 fprintf(file
," %-5s %04x %02x %02x",
2545 (unsigned)(aout_symbol(symbol
)->desc
& 0xffff),
2546 (unsigned)(aout_symbol(symbol
)->other
& 0xff),
2547 (unsigned)(aout_symbol(symbol
)->type
& 0xff));
2549 fprintf(file
," %s", symbol
->name
);
2556 provided a BFD, a section and an offset into the section, calculate
2557 and return the name of the source file and the line nearest to the
2562 NAME(aout
,find_nearest_line
)
2563 (abfd
, section
, symbols
, offset
, filename_ptr
, functionname_ptr
, line_ptr
)
2568 CONST
char **filename_ptr
;
2569 CONST
char **functionname_ptr
;
2570 unsigned int *line_ptr
;
2572 /* Run down the file looking for the filename, function and linenumber */
2574 static char buffer
[100];
2575 static char filename_buffer
[200];
2576 CONST
char *directory_name
= NULL
;
2577 CONST
char *main_file_name
= NULL
;
2578 CONST
char *current_file_name
= NULL
;
2579 CONST
char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2580 bfd_vma high_line_vma
= ~0;
2581 bfd_vma low_func_vma
= 0;
2583 *filename_ptr
= abfd
->filename
;
2584 *functionname_ptr
= 0;
2586 if (symbols
!= (asymbol
**)NULL
) {
2587 for (p
= symbols
; *p
; p
++) {
2588 aout_symbol_type
*q
= (aout_symbol_type
*)(*p
);
2592 main_file_name
= current_file_name
= q
->symbol
.name
;
2593 /* Look ahead to next symbol to check if that too is an N_SO. */
2597 q
= (aout_symbol_type
*)(*p
);
2598 if (q
->type
!= (int)N_SO
)
2601 /* Found a second N_SO First is directory; second is filename. */
2602 directory_name
= current_file_name
;
2603 main_file_name
= current_file_name
= q
->symbol
.name
;
2604 if (obj_textsec(abfd
) != section
)
2608 current_file_name
= q
->symbol
.name
;
2615 /* We'll keep this if it resolves nearer than the one we have already */
2616 if (q
->symbol
.value
>= offset
&&
2617 q
->symbol
.value
< high_line_vma
) {
2618 *line_ptr
= q
->desc
;
2619 high_line_vma
= q
->symbol
.value
;
2620 line_file_name
= current_file_name
;
2625 /* We'll keep this if it is nearer than the one we have already */
2626 if (q
->symbol
.value
>= low_func_vma
&&
2627 q
->symbol
.value
<= offset
) {
2628 low_func_vma
= q
->symbol
.value
;
2629 func
= (asymbol
*)q
;
2631 if (*line_ptr
&& func
) {
2632 CONST
char *function
= func
->name
;
2635 /* The caller expects a symbol name. We actually have a
2636 function name, without the leading underscore. Put the
2637 underscore back in, so that the caller gets a symbol
2639 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2640 strncpy (buffer
, function
, sizeof (buffer
) - 1);
2643 buffer
[0] = bfd_get_symbol_leading_char (abfd
);
2644 strncpy (buffer
+ 1, function
, sizeof (buffer
) - 2);
2646 buffer
[sizeof(buffer
)-1] = 0;
2647 /* Have to remove : stuff */
2648 p
= strchr(buffer
,':');
2649 if (p
!= NULL
) { *p
= '\0'; }
2650 *functionname_ptr
= buffer
;
2662 main_file_name
= line_file_name
;
2663 if (main_file_name
) {
2664 if (main_file_name
[0] == '/' || directory_name
== NULL
)
2665 *filename_ptr
= main_file_name
;
2667 sprintf(filename_buffer
, "%.140s%.50s",
2668 directory_name
, main_file_name
);
2669 *filename_ptr
= filename_buffer
;
2678 NAME(aout
,sizeof_headers
) (abfd
, execable
)
2682 return adata(abfd
).exec_bytes_size
;
2685 /* Free all information we have cached for this BFD. We can always
2686 read it again later if we need it. */
2689 NAME(aout
,bfd_free_cached_info
) (abfd
)
2694 if (bfd_get_format (abfd
) != bfd_object
)
2697 #define FREE(x) if (x != NULL) { free (x); x = NULL; }
2698 FREE (obj_aout_symbols (abfd
));
2699 FREE (obj_aout_external_syms (abfd
));
2700 FREE (obj_aout_external_strings (abfd
));
2701 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
2702 FREE (o
->relocation
);
2708 /* a.out link code. */
2710 static boolean aout_link_add_object_symbols
2711 PARAMS ((bfd
*, struct bfd_link_info
*));
2712 static boolean aout_link_check_archive_element
2713 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*));
2714 static boolean aout_link_free_symbols
PARAMS ((bfd
*));
2715 static boolean aout_link_check_ar_symbols
2716 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*pneeded
));
2717 static boolean aout_link_add_symbols
2718 PARAMS ((bfd
*, struct bfd_link_info
*));
2720 /* Routine to create an entry in an a.out link hash table. */
2722 struct bfd_hash_entry
*
2723 NAME(aout
,link_hash_newfunc
) (entry
, table
, string
)
2724 struct bfd_hash_entry
*entry
;
2725 struct bfd_hash_table
*table
;
2728 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2730 /* Allocate the structure if it has not already been allocated by a
2732 if (ret
== (struct aout_link_hash_entry
*) NULL
)
2733 ret
= ((struct aout_link_hash_entry
*)
2734 bfd_hash_allocate (table
, sizeof (struct aout_link_hash_entry
)));
2735 if (ret
== (struct aout_link_hash_entry
*) NULL
)
2737 bfd_set_error (bfd_error_no_memory
);
2738 return (struct bfd_hash_entry
*) ret
;
2741 /* Call the allocation method of the superclass. */
2742 ret
= ((struct aout_link_hash_entry
*)
2743 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2747 /* Set local fields. */
2748 ret
->written
= false;
2752 return (struct bfd_hash_entry
*) ret
;
2755 /* Initialize an a.out link hash table. */
2758 NAME(aout
,link_hash_table_init
) (table
, abfd
, newfunc
)
2759 struct aout_link_hash_table
*table
;
2761 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
2762 struct bfd_hash_table
*,
2765 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
2768 /* Create an a.out link hash table. */
2770 struct bfd_link_hash_table
*
2771 NAME(aout
,link_hash_table_create
) (abfd
)
2774 struct aout_link_hash_table
*ret
;
2776 ret
= ((struct aout_link_hash_table
*)
2777 malloc (sizeof (struct aout_link_hash_table
)));
2778 if (ret
== (struct aout_link_hash_table
*) NULL
)
2780 bfd_set_error (bfd_error_no_memory
);
2781 return (struct bfd_link_hash_table
*) NULL
;
2783 if (! NAME(aout
,link_hash_table_init
) (ret
, abfd
,
2784 NAME(aout
,link_hash_newfunc
)))
2787 return (struct bfd_link_hash_table
*) NULL
;
2792 /* Given an a.out BFD, add symbols to the global hash table as
2796 NAME(aout
,link_add_symbols
) (abfd
, info
)
2798 struct bfd_link_info
*info
;
2800 switch (bfd_get_format (abfd
))
2803 return aout_link_add_object_symbols (abfd
, info
);
2805 return _bfd_generic_link_add_archive_symbols
2806 (abfd
, info
, aout_link_check_archive_element
);
2808 bfd_set_error (bfd_error_wrong_format
);
2813 /* Add symbols from an a.out object file. */
2816 aout_link_add_object_symbols (abfd
, info
)
2818 struct bfd_link_info
*info
;
2820 if (! aout_get_external_symbols (abfd
))
2822 if (! aout_link_add_symbols (abfd
, info
))
2824 if (! info
->keep_memory
)
2826 if (! aout_link_free_symbols (abfd
))
2832 /* Check a single archive element to see if we need to include it in
2833 the link. *PNEEDED is set according to whether this element is
2834 needed in the link or not. This is called from
2835 _bfd_generic_link_add_archive_symbols. */
2838 aout_link_check_archive_element (abfd
, info
, pneeded
)
2840 struct bfd_link_info
*info
;
2843 if (! aout_get_external_symbols (abfd
))
2846 if (! aout_link_check_ar_symbols (abfd
, info
, pneeded
))
2851 if (! aout_link_add_symbols (abfd
, info
))
2855 /* We keep around the symbols even if we aren't going to use this
2856 object file, because we may want to reread it. This doesn't
2857 waste too much memory, because it isn't all that common to read
2858 an archive element but not need it. */
2859 if (! info
->keep_memory
)
2861 if (! aout_link_free_symbols (abfd
))
2868 /* Free up the internal symbols read from an a.out file. */
2871 aout_link_free_symbols (abfd
)
2874 if (obj_aout_external_syms (abfd
) != (struct external_nlist
*) NULL
)
2876 free ((PTR
) obj_aout_external_syms (abfd
));
2877 obj_aout_external_syms (abfd
) = (struct external_nlist
*) NULL
;
2879 if (obj_aout_external_strings (abfd
) != (char *) NULL
)
2881 free ((PTR
) obj_aout_external_strings (abfd
));
2882 obj_aout_external_strings (abfd
) = (char *) NULL
;
2887 /* Look through the internal symbols to see if this object file should
2888 be included in the link. We should include this object file if it
2889 defines any symbols which are currently undefined. If this object
2890 file defines a common symbol, then we may adjust the size of the
2891 known symbol but we do not include the object file in the link
2892 (unless there is some other reason to include it). */
2895 aout_link_check_ar_symbols (abfd
, info
, pneeded
)
2897 struct bfd_link_info
*info
;
2900 register struct external_nlist
*p
;
2901 struct external_nlist
*pend
;
2906 /* Look through all the symbols. */
2907 p
= obj_aout_external_syms (abfd
);
2908 pend
= p
+ obj_aout_external_sym_count (abfd
);
2909 strings
= obj_aout_external_strings (abfd
);
2910 for (; p
< pend
; p
++)
2912 int type
= bfd_h_get_8 (abfd
, p
->e_type
);
2914 struct bfd_link_hash_entry
*h
;
2916 /* Ignore symbols that are not externally visible. This is an
2917 optimization only, as we check the type more thoroughly
2919 if (((type
& N_EXT
) == 0
2920 || (type
& N_STAB
) != 0
2927 if (type
== N_WARNING
2933 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
2934 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
2936 /* We are only interested in symbols that are currently
2937 undefined or common. */
2938 if (h
== (struct bfd_link_hash_entry
*) NULL
2939 || (h
->type
!= bfd_link_hash_undefined
2940 && h
->type
!= bfd_link_hash_common
))
2942 if (type
== (N_INDR
| N_EXT
))
2947 if (type
== (N_TEXT
| N_EXT
)
2948 || type
== (N_DATA
| N_EXT
)
2949 || type
== (N_BSS
| N_EXT
)
2950 || type
== (N_ABS
| N_EXT
)
2951 || type
== (N_INDR
| N_EXT
))
2953 /* This object file defines this symbol. We must link it
2954 in. This is true regardless of whether the current
2955 definition of the symbol is undefined or common. If the
2956 current definition is common, we have a case in which we
2957 have already seen an object file including
2959 and this object file from the archive includes
2961 In such a case we must include this object file.
2963 FIXME: The SunOS 4.1.3 linker will pull in the archive
2964 element if the symbol is defined in the .data section,
2965 but not if it is defined in the .text section. That
2966 seems a bit crazy to me, and I haven't implemented it.
2967 However, it might be correct. */
2968 if (! (*info
->callbacks
->add_archive_element
) (info
, abfd
, name
))
2974 if (type
== (N_UNDF
| N_EXT
))
2978 value
= GET_WORD (abfd
, p
->e_value
);
2981 /* This symbol is common in the object from the archive
2983 if (h
->type
== bfd_link_hash_undefined
)
2987 symbfd
= h
->u
.undef
.abfd
;
2988 if (symbfd
== (bfd
*) NULL
)
2990 /* This symbol was created as undefined from
2991 outside BFD. We assume that we should link
2992 in the object file. This is done for the -u
2993 option in the linker. */
2994 if (! (*info
->callbacks
->add_archive_element
) (info
,
3001 /* Turn the current link symbol into a common
3002 symbol. It is already on the undefs list. */
3003 h
->type
= bfd_link_hash_common
;
3004 h
->u
.c
.size
= value
;
3005 h
->u
.c
.section
= bfd_make_section_old_way (symbfd
,
3010 /* Adjust the size of the common symbol if
3012 if (value
> h
->u
.c
.size
)
3013 h
->u
.c
.size
= value
;
3023 /* This symbol is weak but defined. We must pull it in if
3024 the current link symbol is undefined, but we don't want
3025 it if the current link symbol is common. */
3026 if (h
->type
== bfd_link_hash_undefined
)
3028 if (! (*info
->callbacks
->add_archive_element
) (info
, abfd
, name
))
3036 /* We do not need this object file. */
3040 /* Add all symbols from an object file to the hash table. */
3043 aout_link_add_symbols (abfd
, info
)
3045 struct bfd_link_info
*info
;
3047 boolean (*add_one_symbol
) PARAMS ((struct bfd_link_info
*, bfd
*,
3048 const char *, flagword
, asection
*,
3049 bfd_vma
, const char *, boolean
,
3051 struct bfd_link_hash_entry
**));
3052 bfd_size_type sym_count
;
3055 struct aout_link_hash_entry
**sym_hash
;
3056 register struct external_nlist
*p
;
3057 struct external_nlist
*pend
;
3059 sym_count
= obj_aout_external_sym_count (abfd
);
3060 strings
= obj_aout_external_strings (abfd
);
3061 if (info
->keep_memory
)
3066 /* We keep a list of the linker hash table entries that correspond
3067 to particular symbols. We could just look them up in the hash
3068 table, but keeping the list is more efficient. Perhaps this
3069 should be conditional on info->keep_memory. */
3070 sym_hash
= ((struct aout_link_hash_entry
**)
3073 * sizeof (struct aout_link_hash_entry
*))));
3074 if (sym_hash
== NULL
&& sym_count
!= 0)
3076 bfd_set_error (bfd_error_no_memory
);
3079 obj_aout_sym_hashes (abfd
) = sym_hash
;
3081 if ((abfd
->flags
& DYNAMIC
) != 0
3082 && aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
3084 if (! (*aout_backend_info (abfd
)->add_dynamic_symbols
) (abfd
, info
))
3088 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
3089 if (add_one_symbol
== NULL
)
3090 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
3092 p
= obj_aout_external_syms (abfd
);
3093 pend
= p
+ sym_count
;
3094 for (; p
< pend
; p
++, sym_hash
++)
3105 type
= bfd_h_get_8 (abfd
, p
->e_type
);
3107 /* Ignore debugging symbols. */
3108 if ((type
& N_STAB
) != 0)
3111 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3112 value
= GET_WORD (abfd
, p
->e_value
);
3129 /* Ignore symbols that are not externally visible. */
3132 /* Ignore local indirect symbol. */
3137 case N_UNDF
| N_EXT
:
3140 section
= bfd_und_section_ptr
;
3144 section
= bfd_com_section_ptr
;
3147 section
= bfd_abs_section_ptr
;
3149 case N_TEXT
| N_EXT
:
3150 section
= obj_textsec (abfd
);
3151 value
-= bfd_get_section_vma (abfd
, section
);
3153 case N_DATA
| N_EXT
:
3154 case N_SETV
| N_EXT
:
3155 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3156 translate_from_native_sym_flags. */
3157 section
= obj_datasec (abfd
);
3158 value
-= bfd_get_section_vma (abfd
, section
);
3161 section
= obj_bsssec (abfd
);
3162 value
-= bfd_get_section_vma (abfd
, section
);
3164 case N_INDR
| N_EXT
:
3165 /* An indirect symbol. The next symbol is the symbol
3166 which this one really is. */
3167 BFD_ASSERT (p
+ 1 < pend
);
3169 string
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3170 section
= bfd_ind_section_ptr
;
3171 flags
|= BSF_INDIRECT
;
3173 case N_COMM
| N_EXT
:
3174 section
= bfd_com_section_ptr
;
3176 case N_SETA
: case N_SETA
| N_EXT
:
3177 section
= bfd_abs_section_ptr
;
3178 flags
|= BSF_CONSTRUCTOR
;
3180 case N_SETT
: case N_SETT
| N_EXT
:
3181 section
= obj_textsec (abfd
);
3182 flags
|= BSF_CONSTRUCTOR
;
3183 value
-= bfd_get_section_vma (abfd
, section
);
3185 case N_SETD
: case N_SETD
| N_EXT
:
3186 section
= obj_datasec (abfd
);
3187 flags
|= BSF_CONSTRUCTOR
;
3188 value
-= bfd_get_section_vma (abfd
, section
);
3190 case N_SETB
: case N_SETB
| N_EXT
:
3191 section
= obj_bsssec (abfd
);
3192 flags
|= BSF_CONSTRUCTOR
;
3193 value
-= bfd_get_section_vma (abfd
, section
);
3196 /* A warning symbol. The next symbol is the one to warn
3198 BFD_ASSERT (p
+ 1 < pend
);
3201 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
3202 section
= bfd_und_section_ptr
;
3203 flags
|= BSF_WARNING
;
3206 section
= bfd_und_section_ptr
;
3210 section
= bfd_abs_section_ptr
;
3214 section
= obj_textsec (abfd
);
3215 value
-= bfd_get_section_vma (abfd
, section
);
3219 section
= obj_datasec (abfd
);
3220 value
-= bfd_get_section_vma (abfd
, section
);
3224 section
= obj_bsssec (abfd
);
3225 value
-= bfd_get_section_vma (abfd
, section
);
3230 if (! ((*add_one_symbol
)
3231 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, false,
3232 (struct bfd_link_hash_entry
**) sym_hash
)))
3235 if (type
== (N_INDR
| N_EXT
) || type
== N_WARNING
)
3242 /* During the final link step we need to pass around a bunch of
3243 information, so we do it in an instance of this structure. */
3245 struct aout_final_link_info
3247 /* General link information. */
3248 struct bfd_link_info
*info
;
3251 /* Reloc file positions. */
3252 file_ptr treloff
, dreloff
;
3253 /* File position of symbols. */
3256 struct strtab_hash strtab
;
3259 static boolean aout_link_input_bfd
3260 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
));
3261 static boolean aout_link_write_symbols
3262 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
, int *symbol_map
));
3263 static boolean aout_link_write_other_symbol
3264 PARAMS ((struct aout_link_hash_entry
*, PTR
));
3265 static boolean aout_link_input_section
3266 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
,
3267 asection
*input_section
, file_ptr
*reloff_ptr
,
3268 bfd_size_type rel_size
, int *symbol_map
));
3269 static boolean aout_link_input_section_std
3270 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
,
3271 asection
*input_section
, struct reloc_std_external
*,
3272 bfd_size_type rel_size
, bfd_byte
*contents
, int *symbol_map
));
3273 static boolean aout_link_input_section_ext
3274 PARAMS ((struct aout_final_link_info
*, bfd
*input_bfd
,
3275 asection
*input_section
, struct reloc_ext_external
*,
3276 bfd_size_type rel_size
, bfd_byte
*contents
, int *symbol_map
));
3277 static INLINE asection
*aout_reloc_index_to_section
3278 PARAMS ((bfd
*, int));
3279 static boolean aout_link_reloc_link_order
3280 PARAMS ((struct aout_final_link_info
*, asection
*,
3281 struct bfd_link_order
*));
3283 /* Do the final link step. This is called on the output BFD. The
3284 INFO structure should point to a list of BFDs linked through the
3285 link_next field which can be used to find each BFD which takes part
3286 in the output. Also, each section in ABFD should point to a list
3287 of bfd_link_order structures which list all the input sections for
3288 the output section. */
3291 NAME(aout
,final_link
) (abfd
, info
, callback
)
3293 struct bfd_link_info
*info
;
3294 void (*callback
) PARAMS ((bfd
*, file_ptr
*, file_ptr
*, file_ptr
*));
3296 struct aout_final_link_info aout_info
;
3298 bfd_size_type text_size
;
3300 register struct bfd_link_order
*p
;
3302 boolean have_link_order_relocs
;
3304 aout_info
.info
= info
;
3305 aout_info
.output_bfd
= abfd
;
3307 if (! info
->relocateable
)
3309 exec_hdr (abfd
)->a_trsize
= 0;
3310 exec_hdr (abfd
)->a_drsize
= 0;
3314 bfd_size_type trsize
, drsize
;
3316 /* Count up the relocation sizes. */
3319 for (sub
= info
->input_bfds
; sub
!= (bfd
*) NULL
; sub
= sub
->link_next
)
3321 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
3323 trsize
+= exec_hdr (sub
)->a_trsize
;
3324 drsize
+= exec_hdr (sub
)->a_drsize
;
3328 /* FIXME: We need to identify the .text and .data sections
3329 and call get_reloc_upper_bound and canonicalize_reloc to
3330 work out the number of relocs needed, and then multiply
3331 by the reloc size. */
3335 if (obj_textsec (abfd
) != (asection
*) NULL
)
3336 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
3338 * obj_reloc_entry_size (abfd
));
3339 exec_hdr (abfd
)->a_trsize
= trsize
;
3340 if (obj_datasec (abfd
) != (asection
*) NULL
)
3341 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
3343 * obj_reloc_entry_size (abfd
));
3344 exec_hdr (abfd
)->a_drsize
= drsize
;
3347 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
3349 /* Adjust the section sizes and vmas according to the magic number.
3350 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3351 filepos for each section. */
3352 if (! NAME(aout
,adjust_sizes_and_vmas
) (abfd
, &text_size
, &text_end
))
3355 /* The relocation and symbol file positions differ among a.out
3356 targets. We are passed a callback routine from the backend
3357 specific code to handle this.
3358 FIXME: At this point we do not know how much space the symbol
3359 table will require. This will not work for any (nonstandard)
3360 a.out target that needs to know the symbol table size before it
3361 can compute the relocation file positions. This may or may not
3362 be the case for the hp300hpux target, for example. */
3363 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
3365 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
3366 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
3367 obj_sym_filepos (abfd
) = aout_info
.symoff
;
3369 /* We keep a count of the symbols as we output them. */
3370 obj_aout_external_sym_count (abfd
) = 0;
3372 /* We accumulate the string table as we write out the symbols. */
3373 if (! stringtab_init (&aout_info
.strtab
))
3376 /* The most time efficient way to do the link would be to read all
3377 the input object files into memory and then sort out the
3378 information into the output file. Unfortunately, that will
3379 probably use too much memory. Another method would be to step
3380 through everything that composes the text section and write it
3381 out, and then everything that composes the data section and write
3382 it out, and then write out the relocs, and then write out the
3383 symbols. Unfortunately, that requires reading stuff from each
3384 input file several times, and we will not be able to keep all the
3385 input files open simultaneously, and reopening them will be slow.
3387 What we do is basically process one input file at a time. We do
3388 everything we need to do with an input file once--copy over the
3389 section contents, handle the relocation information, and write
3390 out the symbols--and then we throw away the information we read
3391 from it. This approach requires a lot of lseeks of the output
3392 file, which is unfortunate but still faster than reopening a lot
3395 We use the output_has_begun field of the input BFDs to see
3396 whether we have already handled it. */
3397 for (sub
= info
->input_bfds
; sub
!= (bfd
*) NULL
; sub
= sub
->link_next
)
3398 sub
->output_has_begun
= false;
3400 have_link_order_relocs
= false;
3401 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
3403 for (p
= o
->link_order_head
;
3404 p
!= (struct bfd_link_order
*) NULL
;
3407 if (p
->type
== bfd_indirect_link_order
3408 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
3409 == bfd_target_aout_flavour
))
3413 input_bfd
= p
->u
.indirect
.section
->owner
;
3414 if (! input_bfd
->output_has_begun
)
3416 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
3418 input_bfd
->output_has_begun
= true;
3421 else if (p
->type
== bfd_section_reloc_link_order
3422 || p
->type
== bfd_symbol_reloc_link_order
)
3424 /* These are handled below. */
3425 have_link_order_relocs
= true;
3429 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
3435 /* Write out any symbols that we have not already written out. */
3436 aout_link_hash_traverse (aout_hash_table (info
),
3437 aout_link_write_other_symbol
,
3440 /* Now handle any relocs we were asked to create by the linker.
3441 These did not come from any input file. We must do these after
3442 we have written out all the symbols, so that we know the symbol
3444 if (have_link_order_relocs
)
3446 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
3448 for (p
= o
->link_order_head
;
3449 p
!= (struct bfd_link_order
*) NULL
;
3452 if (p
->type
== bfd_section_reloc_link_order
3453 || p
->type
== bfd_symbol_reloc_link_order
)
3455 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
3462 /* Finish up any dynamic linking we may be doing. */
3463 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
3465 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
3469 /* Update the header information. */
3470 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
3471 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
3472 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
3473 obj_textsec (abfd
)->reloc_count
=
3474 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
3475 obj_datasec (abfd
)->reloc_count
=
3476 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
3478 /* Write out the string table. */
3479 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0)
3481 return emit_stringtab (abfd
, &aout_info
.strtab
);
3484 /* Link an a.out input BFD into the output file. */
3487 aout_link_input_bfd (finfo
, input_bfd
)
3488 struct aout_final_link_info
*finfo
;
3491 bfd_size_type sym_count
;
3492 int *symbol_map
= NULL
;
3494 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
3496 /* If this is a dynamic object, it may need special handling. */
3497 if ((input_bfd
->flags
& DYNAMIC
) != 0
3498 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
3500 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
3501 (finfo
->info
, input_bfd
));
3504 /* Get the symbols. We probably have them already, unless
3505 finfo->info->keep_memory is false. */
3506 if (! aout_get_external_symbols (input_bfd
))
3509 sym_count
= obj_aout_external_sym_count (input_bfd
);
3510 symbol_map
= (int *) malloc ((size_t) sym_count
* sizeof (int));
3511 if (symbol_map
== NULL
&& sym_count
!= 0)
3513 bfd_set_error (bfd_error_no_memory
);
3517 /* Write out the symbols and get a map of the new indices. */
3518 if (! aout_link_write_symbols (finfo
, input_bfd
, symbol_map
))
3521 /* Relocate and write out the sections. */
3522 if (! aout_link_input_section (finfo
, input_bfd
,
3523 obj_textsec (input_bfd
),
3525 exec_hdr (input_bfd
)->a_trsize
,
3527 || ! aout_link_input_section (finfo
, input_bfd
,
3528 obj_datasec (input_bfd
),
3530 exec_hdr (input_bfd
)->a_drsize
,
3534 /* If we are not keeping memory, we don't need the symbols any
3535 longer. We still need them if we are keeping memory, because the
3536 strings in the hash table point into them. */
3537 if (! finfo
->info
->keep_memory
)
3539 if (! aout_link_free_symbols (input_bfd
))
3543 if (symbol_map
!= NULL
)
3547 if (symbol_map
!= NULL
)
3552 /* Adjust and write out the symbols for an a.out file. Set the new
3553 symbol indices into a symbol_map. */
3556 aout_link_write_symbols (finfo
, input_bfd
, symbol_map
)
3557 struct aout_final_link_info
*finfo
;
3562 bfd_size_type sym_count
;
3564 enum bfd_link_strip strip
;
3565 enum bfd_link_discard discard
;
3566 struct external_nlist
*output_syms
= NULL
;
3567 struct external_nlist
*outsym
;
3568 bfd_size_type strtab_index
;
3569 register struct external_nlist
*sym
;
3570 struct external_nlist
*sym_end
;
3571 struct aout_link_hash_entry
**sym_hash
;
3573 boolean skip_indirect
;
3575 output_bfd
= finfo
->output_bfd
;
3576 sym_count
= obj_aout_external_sym_count (input_bfd
);
3577 strings
= obj_aout_external_strings (input_bfd
);
3578 strip
= finfo
->info
->strip
;
3579 discard
= finfo
->info
->discard
;
3580 output_syms
= ((struct external_nlist
*)
3581 malloc ((size_t) (sym_count
+ 1) * EXTERNAL_NLIST_SIZE
));
3582 if (output_syms
== NULL
)
3584 bfd_set_error (bfd_error_no_memory
);
3587 outsym
= output_syms
;
3589 /* First write out a symbol for this object file, unless we are
3590 discarding such symbols. */
3591 if (strip
!= strip_all
3592 && (strip
!= strip_some
3593 || bfd_hash_lookup (finfo
->info
->keep_hash
, input_bfd
->filename
,
3594 false, false) != NULL
)
3595 && discard
!= discard_all
)
3597 bfd_h_put_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
3598 bfd_h_put_8 (output_bfd
, 0, outsym
->e_other
);
3599 bfd_h_put_16 (output_bfd
, (bfd_vma
) 0, outsym
->e_desc
);
3600 strtab_index
= add_to_stringtab (output_bfd
, &finfo
->strtab
,
3601 input_bfd
->filename
, false);
3602 if (strtab_index
== (bfd_size_type
) -1)
3604 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
3605 PUT_WORD (output_bfd
,
3606 (bfd_get_section_vma (output_bfd
,
3607 obj_textsec (input_bfd
)->output_section
)
3608 + obj_textsec (input_bfd
)->output_offset
),
3610 ++obj_aout_external_sym_count (output_bfd
);
3615 skip_indirect
= false;
3616 sym
= obj_aout_external_syms (input_bfd
);
3617 sym_end
= sym
+ sym_count
;
3618 sym_hash
= obj_aout_sym_hashes (input_bfd
);
3619 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
3623 struct aout_link_hash_entry
*h
;
3631 type
= bfd_h_get_8 (input_bfd
, sym
->e_type
);
3632 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
3638 /* Pass this symbol through. It is the target of an
3639 indirect or warning symbol. */
3640 val
= GET_WORD (input_bfd
, sym
->e_value
);
3643 else if (skip_indirect
)
3645 /* Skip this symbol, which is the target of an indirect
3646 symbol that we have changed to no longer be an indirect
3648 skip_indirect
= false;
3653 struct aout_link_hash_entry
*hresolve
;
3655 /* We have saved the hash table entry for this symbol, if
3656 there is one. Note that we could just look it up again
3657 in the hash table, provided we first check that it is an
3661 /* If this is an indirect or warning symbol, then change
3662 hresolve to the base symbol. We also change *sym_hash so
3663 that the relocation routines relocate against the real
3666 if (h
!= (struct aout_link_hash_entry
*) NULL
3667 && (h
->root
.type
== bfd_link_hash_indirect
3668 || h
->root
.type
== bfd_link_hash_warning
))
3670 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3671 while (hresolve
->root
.type
== bfd_link_hash_indirect
3672 || hresolve
->root
.type
== bfd_link_hash_warning
)
3673 hresolve
= ((struct aout_link_hash_entry
*)
3674 hresolve
->root
.u
.i
.link
);
3675 *sym_hash
= hresolve
;
3678 /* If the symbol has already been written out, skip it. */
3679 if (h
!= (struct aout_link_hash_entry
*) NULL
3680 && h
->root
.type
!= bfd_link_hash_warning
3683 if ((type
& N_TYPE
) == N_INDR
)
3684 skip_indirect
= true;
3685 *symbol_map
= h
->indx
;
3689 /* See if we are stripping this symbol. */
3695 case strip_debugger
:
3696 if ((type
& N_STAB
) != 0)
3700 if (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, false, false)
3710 if (h
!= (struct aout_link_hash_entry
*) NULL
)
3715 /* Get the value of the symbol. */
3716 if ((type
& N_TYPE
) == N_TEXT
3718 symsec
= obj_textsec (input_bfd
);
3719 else if ((type
& N_TYPE
) == N_DATA
3721 symsec
= obj_datasec (input_bfd
);
3722 else if ((type
& N_TYPE
) == N_BSS
3724 symsec
= obj_bsssec (input_bfd
);
3725 else if ((type
& N_TYPE
) == N_ABS
3727 symsec
= bfd_abs_section_ptr
;
3728 else if (((type
& N_TYPE
) == N_INDR
3729 && (hresolve
== (struct aout_link_hash_entry
*) NULL
3730 || (hresolve
->root
.type
!= bfd_link_hash_defined
3731 && hresolve
->root
.type
!= bfd_link_hash_common
)))
3732 || type
== N_WARNING
)
3734 /* Pass the next symbol through unchanged. The
3735 condition above for indirect symbols is so that if
3736 the indirect symbol was defined, we output it with
3737 the correct definition so the debugger will
3740 val
= GET_WORD (input_bfd
, sym
->e_value
);
3743 else if ((type
& N_STAB
) != 0)
3745 val
= GET_WORD (input_bfd
, sym
->e_value
);
3750 /* If we get here with an indirect symbol, it means that
3751 we are outputting it with a real definition. In such
3752 a case we do not want to output the next symbol,
3753 which is the target of the indirection. */
3754 if ((type
& N_TYPE
) == N_INDR
)
3755 skip_indirect
= true;
3757 /* We need to get the value from the hash table. We use
3758 hresolve so that if we have defined an indirect
3759 symbol we output the final definition. */
3760 if (h
== (struct aout_link_hash_entry
*) NULL
)
3762 else if (hresolve
->root
.type
== bfd_link_hash_defined
)
3764 asection
*input_section
;
3765 asection
*output_section
;
3767 /* This case means a common symbol which was turned
3768 into a defined symbol. */
3769 input_section
= hresolve
->root
.u
.def
.section
;
3770 output_section
= input_section
->output_section
;
3771 BFD_ASSERT (bfd_is_abs_section (output_section
)
3772 || output_section
->owner
== output_bfd
);
3773 val
= (hresolve
->root
.u
.def
.value
3774 + bfd_get_section_vma (output_bfd
, output_section
)
3775 + input_section
->output_offset
);
3777 /* Get the correct type based on the section. If
3778 this is a constructed set, force it to be
3779 globally visible. */
3788 if (output_section
== obj_textsec (output_bfd
))
3790 else if (output_section
== obj_datasec (output_bfd
))
3792 else if (output_section
== obj_bsssec (output_bfd
))
3797 else if (hresolve
->root
.type
== bfd_link_hash_common
)
3798 val
= hresolve
->root
.u
.c
.size
;
3799 else if (hresolve
->root
.type
== bfd_link_hash_weak
)
3809 if (symsec
!= (asection
*) NULL
)
3810 val
= (symsec
->output_section
->vma
3811 + symsec
->output_offset
3812 + (GET_WORD (input_bfd
, sym
->e_value
)
3815 /* If this is a global symbol set the written flag, and if
3816 it is a local symbol see if we should discard it. */
3817 if (h
!= (struct aout_link_hash_entry
*) NULL
)
3820 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3829 if (*name
== *finfo
->info
->lprefix
3830 && (finfo
->info
->lprefix_len
== 1
3831 || strncmp (name
, finfo
->info
->lprefix
,
3832 finfo
->info
->lprefix_len
) == 0))
3847 /* Copy this symbol into the list of symbols we are going to
3849 bfd_h_put_8 (output_bfd
, type
, outsym
->e_type
);
3850 bfd_h_put_8 (output_bfd
, bfd_h_get_8 (input_bfd
, sym
->e_other
),
3852 bfd_h_put_16 (output_bfd
, bfd_h_get_16 (input_bfd
, sym
->e_desc
),
3855 if (! finfo
->info
->keep_memory
)
3857 /* name points into a string table which we are going to
3858 free. If there is a hash table entry, use that string.
3859 Otherwise, copy name into memory. */
3860 if (h
!= (struct aout_link_hash_entry
*) NULL
)
3861 name
= (*sym_hash
)->root
.root
.string
;
3865 strtab_index
= add_to_stringtab (output_bfd
, &finfo
->strtab
,
3867 if (strtab_index
== (bfd_size_type
) -1)
3869 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
3870 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
3871 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
3872 ++obj_aout_external_sym_count (output_bfd
);
3876 /* Write out the output symbols we have just constructed. */
3877 if (outsym
> output_syms
)
3879 bfd_size_type outsym_count
;
3881 if (bfd_seek (output_bfd
, finfo
->symoff
, SEEK_SET
) != 0)
3883 outsym_count
= outsym
- output_syms
;
3884 if (bfd_write ((PTR
) output_syms
, (bfd_size_type
) EXTERNAL_NLIST_SIZE
,
3885 (bfd_size_type
) outsym_count
, output_bfd
)
3886 != outsym_count
* EXTERNAL_NLIST_SIZE
)
3888 finfo
->symoff
+= outsym_count
* EXTERNAL_NLIST_SIZE
;
3891 if (output_syms
!= NULL
)
3895 if (output_syms
!= NULL
)
3900 /* Write out a symbol that was not associated with an a.out input
3904 aout_link_write_other_symbol (h
, data
)
3905 struct aout_link_hash_entry
*h
;
3908 struct aout_final_link_info
*finfo
= (struct aout_final_link_info
*) data
;
3912 struct external_nlist outsym
;
3915 output_bfd
= finfo
->output_bfd
;
3917 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3919 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3920 (output_bfd
, finfo
->info
, h
)))
3922 /* FIXME: No way to handle errors. */
3932 if (finfo
->info
->strip
== strip_all
3933 || (finfo
->info
->strip
== strip_some
3934 && bfd_hash_lookup (finfo
->info
->keep_hash
, h
->root
.root
.string
,
3935 false, false) == NULL
))
3938 switch (h
->root
.type
)
3941 case bfd_link_hash_new
:
3943 /* Avoid variable not initialized warnings. */
3945 case bfd_link_hash_undefined
:
3946 type
= N_UNDF
| N_EXT
;
3949 case bfd_link_hash_defined
:
3953 sec
= h
->root
.u
.def
.section
->output_section
;
3954 BFD_ASSERT (bfd_is_abs_section (sec
)
3955 || sec
->owner
== output_bfd
);
3956 if (sec
== obj_textsec (output_bfd
))
3957 type
= N_TEXT
| N_EXT
;
3958 else if (sec
== obj_datasec (output_bfd
))
3959 type
= N_DATA
| N_EXT
;
3960 else if (sec
== obj_bsssec (output_bfd
))
3961 type
= N_BSS
| N_EXT
;
3963 type
= N_ABS
| N_EXT
;
3964 val
= (h
->root
.u
.def
.value
3966 + h
->root
.u
.def
.section
->output_offset
);
3969 case bfd_link_hash_common
:
3970 type
= N_UNDF
| N_EXT
;
3971 val
= h
->root
.u
.c
.size
;
3973 case bfd_link_hash_weak
:
3976 case bfd_link_hash_indirect
:
3977 case bfd_link_hash_warning
:
3978 /* FIXME: Ignore these for now. The circumstances under which
3979 they should be written out are not clear to me. */
3983 bfd_h_put_8 (output_bfd
, type
, outsym
.e_type
);
3984 bfd_h_put_8 (output_bfd
, 0, outsym
.e_other
);
3985 bfd_h_put_16 (output_bfd
, 0, outsym
.e_desc
);
3986 indx
= add_to_stringtab (output_bfd
, &finfo
->strtab
, h
->root
.root
.string
,
3988 if (indx
== (bfd_size_type
) -1)
3990 /* FIXME: No way to handle errors. */
3993 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3994 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3996 if (bfd_seek (output_bfd
, finfo
->symoff
, SEEK_SET
) != 0
3997 || bfd_write ((PTR
) &outsym
, (bfd_size_type
) EXTERNAL_NLIST_SIZE
,
3998 (bfd_size_type
) 1, output_bfd
) != EXTERNAL_NLIST_SIZE
)
4000 /* FIXME: No way to handle errors. */
4004 finfo
->symoff
+= EXTERNAL_NLIST_SIZE
;
4005 h
->indx
= obj_aout_external_sym_count (output_bfd
);
4006 ++obj_aout_external_sym_count (output_bfd
);
4011 /* Link an a.out section into the output file. */
4014 aout_link_input_section (finfo
, input_bfd
, input_section
, reloff_ptr
,
4015 rel_size
, symbol_map
)
4016 struct aout_final_link_info
*finfo
;
4018 asection
*input_section
;
4019 file_ptr
*reloff_ptr
;
4020 bfd_size_type rel_size
;
4023 bfd_size_type input_size
;
4024 bfd_byte
*contents
= NULL
;
4026 PTR free_relocs
= NULL
;
4028 /* Get the section contents. */
4029 input_size
= bfd_section_size (input_bfd
, input_section
);
4030 contents
= (bfd_byte
*) malloc (input_size
);
4031 if (contents
== NULL
&& input_size
!= 0)
4033 bfd_set_error (bfd_error_no_memory
);
4036 if (! bfd_get_section_contents (input_bfd
, input_section
, (PTR
) contents
,
4037 (file_ptr
) 0, input_size
))
4040 /* Read in the relocs if we haven't already done it. */
4041 if (aout_section_data (input_section
) != NULL
4042 && aout_section_data (input_section
)->relocs
!= NULL
)
4043 relocs
= aout_section_data (input_section
)->relocs
;
4046 relocs
= free_relocs
= (PTR
) malloc (rel_size
);
4047 if (relocs
== NULL
&& rel_size
!= 0)
4049 bfd_set_error (bfd_error_no_memory
);
4052 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
4053 || bfd_read (relocs
, 1, rel_size
, input_bfd
) != rel_size
)
4057 /* Relocate the section contents. */
4058 if (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
)
4060 if (! aout_link_input_section_std (finfo
, input_bfd
, input_section
,
4061 (struct reloc_std_external
*) relocs
,
4062 rel_size
, contents
, symbol_map
))
4067 if (! aout_link_input_section_ext (finfo
, input_bfd
, input_section
,
4068 (struct reloc_ext_external
*) relocs
,
4069 rel_size
, contents
, symbol_map
))
4073 /* Write out the section contents. */
4074 if (! bfd_set_section_contents (finfo
->output_bfd
,
4075 input_section
->output_section
,
4077 input_section
->output_offset
,
4081 /* If we are producing relocateable output, the relocs were
4082 modified, and we now write them out. */
4083 if (finfo
->info
->relocateable
)
4085 if (bfd_seek (finfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
4087 if (bfd_write (relocs
, (bfd_size_type
) 1, rel_size
, finfo
->output_bfd
)
4090 *reloff_ptr
+= rel_size
;
4092 /* Assert that the relocs have not run into the symbols, and
4093 that if these are the text relocs they have not run into the
4095 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (finfo
->output_bfd
)
4096 && (reloff_ptr
!= &finfo
->treloff
4098 <= obj_datasec (finfo
->output_bfd
)->rel_filepos
)));
4101 if (free_relocs
!= NULL
)
4103 if (contents
!= NULL
)
4107 if (free_relocs
!= NULL
)
4109 if (contents
!= NULL
)
4114 /* Get the section corresponding to a reloc index. */
4116 static INLINE asection
*
4117 aout_reloc_index_to_section (abfd
, indx
)
4121 switch (indx
& N_TYPE
)
4124 return obj_textsec (abfd
);
4126 return obj_datasec (abfd
);
4128 return obj_bsssec (abfd
);
4131 return bfd_abs_section_ptr
;
4137 /* Relocate an a.out section using standard a.out relocs. */
4140 aout_link_input_section_std (finfo
, input_bfd
, input_section
, relocs
,
4141 rel_size
, contents
, symbol_map
)
4142 struct aout_final_link_info
*finfo
;
4144 asection
*input_section
;
4145 struct reloc_std_external
*relocs
;
4146 bfd_size_type rel_size
;
4150 boolean (*check_dynamic_reloc
) PARAMS ((struct bfd_link_info
*,
4152 struct aout_link_hash_entry
*,
4155 boolean relocateable
;
4156 struct external_nlist
*syms
;
4158 struct aout_link_hash_entry
**sym_hashes
;
4159 bfd_size_type reloc_count
;
4160 register struct reloc_std_external
*rel
;
4161 struct reloc_std_external
*rel_end
;
4163 output_bfd
= finfo
->output_bfd
;
4164 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4166 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_STD_SIZE
);
4167 BFD_ASSERT (input_bfd
->xvec
->header_byteorder_big_p
4168 == output_bfd
->xvec
->header_byteorder_big_p
);
4170 relocateable
= finfo
->info
->relocateable
;
4171 syms
= obj_aout_external_syms (input_bfd
);
4172 strings
= obj_aout_external_strings (input_bfd
);
4173 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4175 reloc_count
= rel_size
/ RELOC_STD_SIZE
;
4177 rel_end
= rel
+ reloc_count
;
4178 for (; rel
< rel_end
; rel
++)
4190 bfd_reloc_status_type r
;
4192 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4194 if (input_bfd
->xvec
->header_byteorder_big_p
)
4196 r_index
= ((rel
->r_index
[0] << 16)
4197 | (rel
->r_index
[1] << 8)
4199 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
4200 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
4201 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_BIG
));
4202 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_BIG
));
4203 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_BIG
));
4204 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
4205 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
4209 r_index
= ((rel
->r_index
[2] << 16)
4210 | (rel
->r_index
[1] << 8)
4212 r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
4213 r_pcrel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
4214 r_baserel
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_BASEREL_LITTLE
));
4215 r_jmptable
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_JMPTABLE_LITTLE
));
4216 r_relative
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_RELATIVE_LITTLE
));
4217 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
4218 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
4221 howto_idx
= r_length
+ 4 * r_pcrel
+ 8 * r_baserel
4222 + 16 * r_jmptable
+ 32 * r_relative
;
4223 BFD_ASSERT (howto_idx
< TABLE_SIZE (howto_table_std
));
4227 /* We are generating a relocateable output file, and must
4228 modify the reloc accordingly. */
4231 struct aout_link_hash_entry
*h
;
4233 /* If we know the symbol this relocation is against,
4234 convert it into a relocation against a section. This
4235 is what the native linker does. */
4236 h
= sym_hashes
[r_index
];
4237 if (h
!= (struct aout_link_hash_entry
*) NULL
4238 && h
->root
.type
== bfd_link_hash_defined
)
4240 asection
*output_section
;
4242 /* Change the r_extern value. */
4243 if (output_bfd
->xvec
->header_byteorder_big_p
)
4244 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_BIG
;
4246 rel
->r_type
[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE
;
4248 /* Compute a new r_index. */
4249 output_section
= h
->root
.u
.def
.section
->output_section
;
4250 if (output_section
== obj_textsec (output_bfd
))
4252 else if (output_section
== obj_datasec (output_bfd
))
4254 else if (output_section
== obj_bsssec (output_bfd
))
4259 /* Add the symbol value and the section VMA to the
4260 addend stored in the contents. */
4261 relocation
= (h
->root
.u
.def
.value
4262 + output_section
->vma
4263 + h
->root
.u
.def
.section
->output_offset
);
4267 /* We must change r_index according to the symbol
4269 r_index
= symbol_map
[r_index
];
4275 name
= strings
+ GET_WORD (input_bfd
,
4276 syms
[r_index
].e_strx
);
4277 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
4278 (finfo
->info
, name
, input_bfd
, input_section
,
4287 /* Write out the new r_index value. */
4288 if (output_bfd
->xvec
->header_byteorder_big_p
)
4290 rel
->r_index
[0] = r_index
>> 16;
4291 rel
->r_index
[1] = r_index
>> 8;
4292 rel
->r_index
[2] = r_index
;
4296 rel
->r_index
[2] = r_index
>> 16;
4297 rel
->r_index
[1] = r_index
>> 8;
4298 rel
->r_index
[0] = r_index
;
4305 /* This is a relocation against a section. We must
4306 adjust by the amount that the section moved. */
4307 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4308 relocation
= (section
->output_section
->vma
4309 + section
->output_offset
4313 /* Change the address of the relocation. */
4314 PUT_WORD (output_bfd
,
4315 r_addr
+ input_section
->output_offset
,
4318 /* Adjust a PC relative relocation by removing the reference
4319 to the original address in the section and including the
4320 reference to the new address. */
4322 relocation
-= (input_section
->output_section
->vma
4323 + input_section
->output_offset
4324 - input_section
->vma
);
4326 if (relocation
== 0)
4329 r
= _bfd_relocate_contents (howto_table_std
+ howto_idx
,
4330 input_bfd
, relocation
,
4335 /* We are generating an executable, and must do a full
4339 struct aout_link_hash_entry
*h
;
4341 h
= sym_hashes
[r_index
];
4343 if (check_dynamic_reloc
!= NULL
)
4347 if (! ((*check_dynamic_reloc
)
4348 (finfo
->info
, input_bfd
, input_section
, h
,
4355 if (h
!= (struct aout_link_hash_entry
*) NULL
4356 && h
->root
.type
== bfd_link_hash_defined
)
4358 relocation
= (h
->root
.u
.def
.value
4359 + h
->root
.u
.def
.section
->output_section
->vma
4360 + h
->root
.u
.def
.section
->output_offset
);
4362 else if (h
!= (struct aout_link_hash_entry
*) NULL
4363 && h
->root
.type
== bfd_link_hash_weak
)
4369 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4370 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
4371 (finfo
->info
, name
, input_bfd
, input_section
,
4381 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4382 relocation
= (section
->output_section
->vma
4383 + section
->output_offset
4386 relocation
+= input_section
->vma
;
4389 r
= _bfd_final_link_relocate (howto_table_std
+ howto_idx
,
4390 input_bfd
, input_section
,
4391 contents
, r_addr
, relocation
,
4395 if (r
!= bfd_reloc_ok
)
4400 case bfd_reloc_outofrange
:
4402 case bfd_reloc_overflow
:
4407 name
= strings
+ GET_WORD (input_bfd
,
4408 syms
[r_index
].e_strx
);
4413 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4414 name
= bfd_section_name (input_bfd
, s
);
4416 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
4417 (finfo
->info
, name
, howto_table_std
[howto_idx
].name
,
4418 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
)))
4429 /* Relocate an a.out section using extended a.out relocs. */
4432 aout_link_input_section_ext (finfo
, input_bfd
, input_section
, relocs
,
4433 rel_size
, contents
, symbol_map
)
4434 struct aout_final_link_info
*finfo
;
4436 asection
*input_section
;
4437 struct reloc_ext_external
*relocs
;
4438 bfd_size_type rel_size
;
4442 boolean (*check_dynamic_reloc
) PARAMS ((struct bfd_link_info
*,
4444 struct aout_link_hash_entry
*,
4447 boolean relocateable
;
4448 struct external_nlist
*syms
;
4450 struct aout_link_hash_entry
**sym_hashes
;
4451 bfd_size_type reloc_count
;
4452 register struct reloc_ext_external
*rel
;
4453 struct reloc_ext_external
*rel_end
;
4455 output_bfd
= finfo
->output_bfd
;
4456 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
4458 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_EXT_SIZE
);
4459 BFD_ASSERT (input_bfd
->xvec
->header_byteorder_big_p
4460 == output_bfd
->xvec
->header_byteorder_big_p
);
4462 relocateable
= finfo
->info
->relocateable
;
4463 syms
= obj_aout_external_syms (input_bfd
);
4464 strings
= obj_aout_external_strings (input_bfd
);
4465 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
4467 reloc_count
= rel_size
/ RELOC_EXT_SIZE
;
4469 rel_end
= rel
+ reloc_count
;
4470 for (; rel
< rel_end
; rel
++)
4479 r_addr
= GET_SWORD (input_bfd
, rel
->r_address
);
4481 if (input_bfd
->xvec
->header_byteorder_big_p
)
4483 r_index
= ((rel
->r_index
[0] << 16)
4484 | (rel
->r_index
[1] << 8)
4486 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
));
4487 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
4488 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
4492 r_index
= ((rel
->r_index
[2] << 16)
4493 | (rel
->r_index
[1] << 8)
4495 r_extern
= (0 != (rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
));
4496 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
4497 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4500 r_addend
= GET_SWORD (input_bfd
, rel
->r_addend
);
4502 BFD_ASSERT (r_type
>= 0
4503 && r_type
< TABLE_SIZE (howto_table_ext
));
4507 /* We are generating a relocateable output file, and must
4508 modify the reloc accordingly. */
4511 struct aout_link_hash_entry
*h
;
4513 /* If we know the symbol this relocation is against,
4514 convert it into a relocation against a section. This
4515 is what the native linker does. */
4516 h
= sym_hashes
[r_index
];
4517 if (h
!= (struct aout_link_hash_entry
*) NULL
4518 && h
->root
.type
== bfd_link_hash_defined
)
4520 asection
*output_section
;
4522 /* Change the r_extern value. */
4523 if (output_bfd
->xvec
->header_byteorder_big_p
)
4524 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_BIG
;
4526 rel
->r_type
[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE
;
4528 /* Compute a new r_index. */
4529 output_section
= h
->root
.u
.def
.section
->output_section
;
4530 if (output_section
== obj_textsec (output_bfd
))
4532 else if (output_section
== obj_datasec (output_bfd
))
4534 else if (output_section
== obj_bsssec (output_bfd
))
4539 /* Add the symbol value and the section VMA to the
4541 relocation
= (h
->root
.u
.def
.value
4542 + output_section
->vma
4543 + h
->root
.u
.def
.section
->output_offset
);
4545 /* Now RELOCATION is the VMA of the final
4546 destination. If this is a PC relative reloc,
4547 then ADDEND is the negative of the source VMA.
4548 We want to set ADDEND to the difference between
4549 the destination VMA and the source VMA, which
4550 means we must adjust RELOCATION by the change in
4551 the source VMA. This is done below. */
4555 /* We must change r_index according to the symbol
4557 r_index
= symbol_map
[r_index
];
4564 + GET_WORD (input_bfd
, syms
[r_index
].e_strx
));
4565 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
4566 (finfo
->info
, name
, input_bfd
, input_section
,
4574 /* If this is a PC relative reloc, then the addend
4575 is the negative of the source VMA. We must
4576 adjust it by the change in the source VMA. This
4580 /* Write out the new r_index value. */
4581 if (output_bfd
->xvec
->header_byteorder_big_p
)
4583 rel
->r_index
[0] = r_index
>> 16;
4584 rel
->r_index
[1] = r_index
>> 8;
4585 rel
->r_index
[2] = r_index
;
4589 rel
->r_index
[2] = r_index
>> 16;
4590 rel
->r_index
[1] = r_index
>> 8;
4591 rel
->r_index
[0] = r_index
;
4598 /* This is a relocation against a section. We must
4599 adjust by the amount that the section moved. */
4600 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4601 relocation
= (section
->output_section
->vma
4602 + section
->output_offset
4605 /* If this is a PC relative reloc, then the addend is
4606 the difference in VMA between the destination and the
4607 source. We have just adjusted for the change in VMA
4608 of the destination, so we must also adjust by the
4609 change in VMA of the source. This is done below. */
4612 /* As described above, we must always adjust a PC relative
4613 reloc by the change in VMA of the source. */
4614 if (howto_table_ext
[r_type
].pc_relative
)
4615 relocation
-= (input_section
->output_section
->vma
4616 + input_section
->output_offset
4617 - input_section
->vma
);
4619 /* Change the addend if necessary. */
4620 if (relocation
!= 0)
4621 PUT_WORD (output_bfd
, r_addend
+ relocation
, rel
->r_addend
);
4623 /* Change the address of the relocation. */
4624 PUT_WORD (output_bfd
,
4625 r_addr
+ input_section
->output_offset
,
4630 bfd_reloc_status_type r
;
4632 /* We are generating an executable, and must do a full
4636 struct aout_link_hash_entry
*h
;
4638 h
= sym_hashes
[r_index
];
4640 if (check_dynamic_reloc
!= NULL
)
4644 if (! ((*check_dynamic_reloc
)
4645 (finfo
->info
, input_bfd
, input_section
, h
,
4652 if (h
!= (struct aout_link_hash_entry
*) NULL
4653 && h
->root
.type
== bfd_link_hash_defined
)
4655 relocation
= (h
->root
.u
.def
.value
4656 + h
->root
.u
.def
.section
->output_section
->vma
4657 + h
->root
.u
.def
.section
->output_offset
);
4659 else if (h
!= (struct aout_link_hash_entry
*) NULL
4660 && h
->root
.type
== bfd_link_hash_weak
)
4666 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
4667 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
4668 (finfo
->info
, name
, input_bfd
, input_section
,
4678 section
= aout_reloc_index_to_section (input_bfd
, r_index
);
4680 /* If this is a PC relative reloc, then R_ADDEND is the
4681 difference between the two vmas, or
4682 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4684 old_dest_sec == section->vma
4686 old_src_sec == input_section->vma
4688 old_src_off == r_addr
4690 _bfd_final_link_relocate expects RELOCATION +
4691 R_ADDEND to be the VMA of the destination minus
4692 r_addr (the minus r_addr is because this relocation
4693 is not pcrel_offset, which is a bit confusing and
4694 should, perhaps, be changed), or
4697 new_dest_sec == output_section->vma + output_offset
4698 We arrange for this to happen by setting RELOCATION to
4699 new_dest_sec + old_src_sec - old_dest_sec
4701 If this is not a PC relative reloc, then R_ADDEND is
4702 simply the VMA of the destination, so we set
4703 RELOCATION to the change in the destination VMA, or
4704 new_dest_sec - old_dest_sec
4706 relocation
= (section
->output_section
->vma
4707 + section
->output_offset
4709 if (howto_table_ext
[r_type
].pc_relative
)
4710 relocation
+= input_section
->vma
;
4713 r
= _bfd_final_link_relocate (howto_table_ext
+ r_type
,
4714 input_bfd
, input_section
,
4715 contents
, r_addr
, relocation
,
4717 if (r
!= bfd_reloc_ok
)
4722 case bfd_reloc_outofrange
:
4724 case bfd_reloc_overflow
:
4729 name
= strings
+ GET_WORD (input_bfd
,
4730 syms
[r_index
].e_strx
);
4735 s
= aout_reloc_index_to_section (input_bfd
, r_index
);
4736 name
= bfd_section_name (input_bfd
, s
);
4738 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
4739 (finfo
->info
, name
, howto_table_ext
[r_type
].name
,
4740 r_addend
, input_bfd
, input_section
, r_addr
)))
4752 /* Handle a link order which is supposed to generate a reloc. */
4755 aout_link_reloc_link_order (finfo
, o
, p
)
4756 struct aout_final_link_info
*finfo
;
4758 struct bfd_link_order
*p
;
4760 struct bfd_link_order_reloc
*pr
;
4763 const reloc_howto_type
*howto
;
4764 file_ptr
*reloff_ptr
;
4765 struct reloc_std_external srel
;
4766 struct reloc_ext_external erel
;
4771 if (p
->type
== bfd_section_reloc_link_order
)
4774 if (bfd_is_abs_section (pr
->u
.section
))
4775 r_index
= N_ABS
| N_EXT
;
4778 BFD_ASSERT (pr
->u
.section
->owner
== finfo
->output_bfd
);
4779 r_index
= pr
->u
.section
->target_index
;
4784 struct aout_link_hash_entry
*h
;
4786 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
4788 h
= aout_link_hash_lookup (aout_hash_table (finfo
->info
),
4789 pr
->u
.name
, false, false, true);
4790 if (h
!= (struct aout_link_hash_entry
*) NULL
4795 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
4796 (finfo
->info
, pr
->u
.name
, (bfd
*) NULL
,
4797 (asection
*) NULL
, (bfd_vma
) 0)))
4803 howto
= bfd_reloc_type_lookup (finfo
->output_bfd
, pr
->reloc
);
4804 if (howto
== (const reloc_howto_type
*) NULL
)
4806 bfd_set_error (bfd_error_bad_value
);
4810 if (o
== obj_textsec (finfo
->output_bfd
))
4811 reloff_ptr
= &finfo
->treloff
;
4812 else if (o
== obj_datasec (finfo
->output_bfd
))
4813 reloff_ptr
= &finfo
->dreloff
;
4817 if (obj_reloc_entry_size (finfo
->output_bfd
) == RELOC_STD_SIZE
)
4825 r_pcrel
= howto
->pc_relative
;
4826 r_baserel
= (howto
->type
& 8) != 0;
4827 r_jmptable
= (howto
->type
& 16) != 0;
4828 r_relative
= (howto
->type
& 32) != 0;
4829 r_length
= howto
->size
;
4831 PUT_WORD (finfo
->output_bfd
, p
->offset
, srel
.r_address
);
4832 if (finfo
->output_bfd
->xvec
->header_byteorder_big_p
)
4834 srel
.r_index
[0] = r_index
>> 16;
4835 srel
.r_index
[1] = r_index
>> 8;
4836 srel
.r_index
[2] = r_index
;
4838 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
4839 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
4840 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
4841 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
4842 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
4843 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
4847 srel
.r_index
[2] = r_index
>> 16;
4848 srel
.r_index
[1] = r_index
>> 8;
4849 srel
.r_index
[0] = r_index
;
4851 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
4852 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
4853 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
4854 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
4855 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
4856 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
4859 rel_ptr
= (PTR
) &srel
;
4861 /* We have to write the addend into the object file, since
4862 standard a.out relocs are in place. It would be more
4863 reliable if we had the current contents of the file here,
4864 rather than assuming zeroes, but we can't read the file since
4865 it was opened using bfd_openw. */
4866 if (pr
->addend
!= 0)
4869 bfd_reloc_status_type r
;
4873 size
= bfd_get_reloc_size (howto
);
4874 buf
= (bfd_byte
*) bfd_zmalloc (size
);
4875 if (buf
== (bfd_byte
*) NULL
)
4877 bfd_set_error (bfd_error_no_memory
);
4880 r
= _bfd_relocate_contents (howto
, finfo
->output_bfd
,
4887 case bfd_reloc_outofrange
:
4889 case bfd_reloc_overflow
:
4890 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
4892 (p
->type
== bfd_section_reloc_link_order
4893 ? bfd_section_name (finfo
->output_bfd
,
4896 howto
->name
, pr
->addend
, (bfd
*) NULL
,
4897 (asection
*) NULL
, (bfd_vma
) 0)))
4904 ok
= bfd_set_section_contents (finfo
->output_bfd
, o
,
4906 (file_ptr
) p
->offset
,
4915 PUT_WORD (finfo
->output_bfd
, p
->offset
, erel
.r_address
);
4917 if (finfo
->output_bfd
->xvec
->header_byteorder_big_p
)
4919 erel
.r_index
[0] = r_index
>> 16;
4920 erel
.r_index
[1] = r_index
>> 8;
4921 erel
.r_index
[2] = r_index
;
4923 ((r_extern
? RELOC_EXT_BITS_EXTERN_BIG
: 0)
4924 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_BIG
));
4928 erel
.r_index
[2] = r_index
>> 16;
4929 erel
.r_index
[1] = r_index
>> 8;
4930 erel
.r_index
[0] = r_index
;
4932 (r_extern
? RELOC_EXT_BITS_EXTERN_LITTLE
: 0)
4933 | (howto
->type
<< RELOC_EXT_BITS_TYPE_SH_LITTLE
);
4936 PUT_WORD (finfo
->output_bfd
, pr
->addend
, erel
.r_addend
);
4938 rel_ptr
= (PTR
) &erel
;
4941 if (bfd_seek (finfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
4942 || (bfd_write (rel_ptr
, (bfd_size_type
) 1,
4943 obj_reloc_entry_size (finfo
->output_bfd
),
4945 != obj_reloc_entry_size (finfo
->output_bfd
)))
4948 *reloff_ptr
+= obj_reloc_entry_size (finfo
->output_bfd
);
4950 /* Assert that the relocs have not run into the symbols, and that n
4951 the text relocs have not run into the data relocs. */
4952 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (finfo
->output_bfd
)
4953 && (reloff_ptr
!= &finfo
->treloff
4955 <= obj_datasec (finfo
->output_bfd
)->rel_filepos
)));