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 *));
142 The file @file{aoutx.h} provides for both the @emph{standard}
143 and @emph{extended} forms of a.out relocation records.
145 The standard records contain only an
146 address, a symbol index, and a type field. The extended records
147 (used on 29ks and sparcs) also have a full integer for an
151 #define CTOR_TABLE_RELOC_IDX 2
153 #define howto_table_ext NAME(aout,ext_howto_table)
154 #define howto_table_std NAME(aout,std_howto_table)
156 reloc_howto_type howto_table_ext[] =
158 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
159 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false),
160 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false),
161 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false),
162 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false),
163 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false),
164 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false),
165 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false),
166 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false),
167 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false),
168 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false),
169 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false),
170 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false),
171 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false),
172 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false),
173 HOWTO(RELOC_BASE10, 0, 2, 16, false, 0, complain_overflow_bitfield,0,"BASE10", false, 0,0x0000ffff, false),
174 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"BASE13", false, 0,0x00001fff, false),
175 HOWTO(RELOC_BASE22, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x00000000, false),
176 HOWTO(RELOC_PC10, 0, 2, 10, false, 0, complain_overflow_bitfield,0,"PC10", false, 0,0x000003ff, false),
177 HOWTO(RELOC_PC22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"PC22", false, 0,0x003fffff, false),
178 HOWTO(RELOC_JMP_TBL,0, 2, 32, false, 0, complain_overflow_bitfield,0,"JMP_TBL", false, 0,0xffffffff, false),
179 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false),
180 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false),
181 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false),
182 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
185 /* Convert standard reloc records to "arelent" format (incl byte swap). */
187 reloc_howto_type howto_table_std[] = {
188 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
189 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false),
190 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false),
191 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false),
192 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false),
193 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
194 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
195 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
196 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
198 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false),
199 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false),
205 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false),
213 { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 },
214 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
222 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false),
225 #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
227 CONST struct reloc_howto_struct *
228 NAME(aout,reloc_type_lookup) (abfd,code)
230 bfd_reloc_code_real_type code;
232 #define EXT(i,j) case i: return &howto_table_ext[j]
233 #define STD(i,j) case i: return &howto_table_std[j]
234 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
235 if (code == BFD_RELOC_CTOR)
236 switch (bfd_get_arch_info (abfd)->bits_per_address)
248 EXT (BFD_RELOC_32, 2);
249 EXT (BFD_RELOC_HI22, 8);
250 EXT (BFD_RELOC_LO10, 11);
251 EXT (BFD_RELOC_32_PCREL_S2, 6);
252 EXT (BFD_RELOC_SPARC_WDISP22, 7);
253 EXT (BFD_RELOC_SPARC13, 10);
254 EXT (BFD_RELOC_SPARC_BASE13, 15);
255 default: return (CONST struct reloc_howto_struct *) 0;
261 STD (BFD_RELOC_16, 1);
262 STD (BFD_RELOC_32, 2);
263 STD (BFD_RELOC_8_PCREL, 4);
264 STD (BFD_RELOC_16_PCREL, 5);
265 STD (BFD_RELOC_32_PCREL, 6);
266 STD (BFD_RELOC_16_BASEREL, 9);
267 STD (BFD_RELOC_32_BASEREL, 10);
268 default: return (CONST struct reloc_howto_struct *) 0;
274 Internal entry points
277 @file{aoutx.h} exports several routines for accessing the
278 contents of an a.out file, which are gathered and exported in
279 turn by various format specific files (eg sunos.c).
285 aout_@var{size}_swap_exec_header_in
288 void aout_@var{size}_swap_exec_header_in,
290 struct external_exec *raw_bytes,
291 struct internal_exec *execp);
294 Swap the information in an executable header @var{raw_bytes} taken
295 from a raw byte stream memory image into the internal exec header
296 structure @var{execp}.
299 #ifndef NAME_swap_exec_header_in
301 NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
303 struct external_exec *raw_bytes;
304 struct internal_exec *execp;
306 struct external_exec *bytes = (struct external_exec *)raw_bytes;
308 /* The internal_exec structure has some fields that are unused in this
309 configuration (IE for i960), so ensure that all such uninitialized
310 fields are zero'd out. There are places where two of these structs
311 are memcmp'd, and thus the contents do matter. */
312 memset ((PTR) execp, 0, sizeof (struct internal_exec));
313 /* Now fill in fields in the execp, from the bytes in the raw data. */
314 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
315 execp->a_text = GET_WORD (abfd, bytes->e_text);
316 execp->a_data = GET_WORD (abfd, bytes->e_data);
317 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
318 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
319 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
320 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
321 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
323 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
328 aout_@var{size}_swap_exec_header_out
331 void aout_@var{size}_swap_exec_header_out
333 struct internal_exec *execp,
334 struct external_exec *raw_bytes);
337 Swap the information in an internal exec header structure
338 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
341 NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
343 struct internal_exec *execp;
344 struct external_exec *raw_bytes;
346 struct external_exec *bytes = (struct external_exec *)raw_bytes;
348 /* Now fill in fields in the raw data, from the fields in the exec struct. */
349 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
350 PUT_WORD (abfd, execp->a_text , bytes->e_text);
351 PUT_WORD (abfd, execp->a_data , bytes->e_data);
352 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
353 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
354 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
355 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
356 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
359 /* Make all the section for an a.out file. */
362 NAME(aout,make_sections) (abfd)
365 if (obj_textsec (abfd) == (asection *) NULL
366 && bfd_make_section (abfd, ".text") == (asection *) NULL)
368 if (obj_datasec (abfd) == (asection *) NULL
369 && bfd_make_section (abfd, ".data") == (asection *) NULL)
371 if (obj_bsssec (abfd) == (asection *) NULL
372 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
379 aout_@var{size}_some_aout_object_p
382 bfd_target *aout_@var{size}_some_aout_object_p
384 bfd_target *(*callback_to_real_object_p)());
387 Some a.out variant thinks that the file open in @var{abfd}
388 checking is an a.out file. Do some more checking, and set up
389 for access if it really is. Call back to the calling
390 environment's "finish up" function just before returning, to
391 handle any last-minute setup.
395 NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
397 struct internal_exec *execp;
398 bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
400 struct aout_data_struct *rawptr, *oldrawptr;
403 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
404 if (rawptr == NULL) {
405 bfd_set_error (bfd_error_no_memory);
409 oldrawptr = abfd->tdata.aout_data;
410 abfd->tdata.aout_data = rawptr;
412 /* Copy the contents of the old tdata struct.
413 In particular, we want the subformat, since for hpux it was set in
414 hp300hpux.c:swap_exec_header_in and will be used in
415 hp300hpux.c:callback. */
416 if (oldrawptr != NULL)
417 *abfd->tdata.aout_data = *oldrawptr;
419 abfd->tdata.aout_data->a.hdr = &rawptr->e;
420 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */
421 execp = abfd->tdata.aout_data->a.hdr;
423 /* Set the file flags */
424 abfd->flags = NO_FLAGS;
425 if (execp->a_drsize || execp->a_trsize)
426 abfd->flags |= HAS_RELOC;
427 /* Setting of EXEC_P has been deferred to the bottom of this function */
429 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
430 if (N_DYNAMIC(*execp))
431 abfd->flags |= DYNAMIC;
433 if (N_MAGIC (*execp) == ZMAGIC)
435 abfd->flags |= D_PAGED|WP_TEXT;
436 adata(abfd).magic = z_magic;
438 else if (N_MAGIC (*execp) == NMAGIC)
440 abfd->flags |= WP_TEXT;
441 adata(abfd).magic = n_magic;
444 adata(abfd).magic = o_magic;
446 bfd_get_start_address (abfd) = execp->a_entry;
448 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
449 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
451 /* The default relocation entry size is that of traditional V7 Unix. */
452 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
454 /* The default symbol entry size is that of traditional Unix. */
455 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
457 obj_aout_external_syms (abfd) = NULL;
458 obj_aout_external_strings (abfd) = NULL;
459 obj_aout_sym_hashes (abfd) = NULL;
461 if (! NAME(aout,make_sections) (abfd))
464 obj_datasec (abfd)->_raw_size = execp->a_data;
465 obj_bsssec (abfd)->_raw_size = execp->a_bss;
467 /* If this object is dynamically linked, we assume that both
468 sections have relocs. This does no real harm, even though it may
470 obj_textsec (abfd)->flags =
471 (execp->a_trsize != 0 || (abfd->flags & DYNAMIC) != 0
472 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
473 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
474 obj_datasec (abfd)->flags =
475 (execp->a_drsize != 0 || (abfd->flags & DYNAMIC) != 0
476 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
477 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
478 obj_bsssec (abfd)->flags = SEC_ALLOC;
480 #ifdef THIS_IS_ONLY_DOCUMENTATION
481 /* The common code can't fill in these things because they depend
482 on either the start address of the text segment, the rounding
483 up of virtual addresses between segments, or the starting file
484 position of the text segment -- all of which varies among different
485 versions of a.out. */
487 /* Call back to the format-dependent code to fill in the rest of the
488 fields and do any further cleanup. Things that should be filled
489 in by the callback: */
491 struct exec *execp = exec_hdr (abfd);
493 obj_textsec (abfd)->size = N_TXTSIZE(*execp);
494 obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp);
495 /* data and bss are already filled in since they're so standard */
497 /* The virtual memory addresses of the sections */
498 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
499 obj_datasec (abfd)->vma = N_DATADDR(*execp);
500 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
502 /* The file offsets of the sections */
503 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
504 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
506 /* The file offsets of the relocation info */
507 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
508 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
510 /* The file offsets of the string table and symbol table. */
511 obj_str_filepos (abfd) = N_STROFF (*execp);
512 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
514 /* Determine the architecture and machine type of the object file. */
515 switch (N_MACHTYPE (*exec_hdr (abfd))) {
517 abfd->obj_arch = bfd_arch_obscure;
521 adata(abfd)->page_size = PAGE_SIZE;
522 adata(abfd)->segment_size = SEGMENT_SIZE;
523 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
527 /* The architecture is encoded in various ways in various a.out variants,
528 or is not encoded at all in some of them. The relocation size depends
529 on the architecture and the a.out variant. Finally, the return value
530 is the bfd_target vector in use. If an error occurs, return zero and
531 set bfd_error to the appropriate error code.
533 Formats such as b.out, which have additional fields in the a.out
534 header, should cope with them in this callback as well. */
535 #endif /* DOCUMENTATION */
537 result = (*callback_to_real_object_p)(abfd);
539 /* Now that the segment addresses have been worked out, take a better
540 guess at whether the file is executable. If the entry point
541 is within the text segment, assume it is. (This makes files
542 executable even if their entry point address is 0, as long as
543 their text starts at zero.)
545 At some point we should probably break down and stat the file and
546 declare it executable if (one of) its 'x' bits are on... */
547 if ((execp->a_entry >= obj_textsec(abfd)->vma) &&
548 (execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
549 abfd->flags |= EXEC_P;
552 #if 0 /* These should be set correctly anyways. */
553 abfd->sections = obj_textsec (abfd);
554 obj_textsec (abfd)->next = obj_datasec (abfd);
555 obj_datasec (abfd)->next = obj_bsssec (abfd);
561 abfd->tdata.aout_data = oldrawptr;
568 aout_@var{size}_mkobject
571 boolean aout_@var{size}_mkobject, (bfd *abfd);
574 Initialize BFD @var{abfd} for use with a.out files.
578 NAME(aout,mkobject) (abfd)
581 struct aout_data_struct *rawptr;
583 bfd_set_error (bfd_error_system_call);
585 /* Use an intermediate variable for clarity */
586 rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
588 if (rawptr == NULL) {
589 bfd_set_error (bfd_error_no_memory);
593 abfd->tdata.aout_data = rawptr;
594 exec_hdr (abfd) = &(rawptr->e);
596 obj_textsec (abfd) = (asection *)NULL;
597 obj_datasec (abfd) = (asection *)NULL;
598 obj_bsssec (abfd) = (asection *)NULL;
606 aout_@var{size}_machine_type
609 enum machine_type aout_@var{size}_machine_type
610 (enum bfd_architecture arch,
611 unsigned long machine));
614 Keep track of machine architecture and machine type for
615 a.out's. Return the <<machine_type>> for a particular
616 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
617 and machine can't be represented in a.out format.
619 If the architecture is understood, machine type 0 (default)
620 is always understood.
624 NAME(aout,machine_type) (arch, machine)
625 enum bfd_architecture arch;
626 unsigned long machine;
628 enum machine_type arch_flags;
630 arch_flags = M_UNKNOWN;
634 if (machine == 0) arch_flags = M_SPARC;
639 case 0: arch_flags = M_68010; break;
640 case 68000: arch_flags = M_UNKNOWN; break;
641 case 68010: arch_flags = M_68010; break;
642 case 68020: arch_flags = M_68020; break;
643 default: arch_flags = M_UNKNOWN; break;
648 if (machine == 0) arch_flags = M_386;
652 if (machine == 0) arch_flags = M_29K;
659 case 3000: arch_flags = M_MIPS1; break;
662 case 6000: arch_flags = M_MIPS2; break;
663 default: arch_flags = M_UNKNOWN; break;
668 arch_flags = M_UNKNOWN;
676 aout_@var{size}_set_arch_mach
679 boolean aout_@var{size}_set_arch_mach,
681 enum bfd_architecture arch,
682 unsigned long machine));
685 Set the architecture and the machine of the BFD @var{abfd} to the
686 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
687 can support the architecture required.
691 NAME(aout,set_arch_mach) (abfd, arch, machine)
693 enum bfd_architecture arch;
694 unsigned long machine;
696 if (! bfd_default_set_arch_mach (abfd, arch, machine))
699 if (arch != bfd_arch_unknown &&
700 NAME(aout,machine_type) (arch, machine) == M_UNKNOWN)
701 return false; /* We can't represent this type */
703 /* Determine the size of a relocation entry */
708 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
711 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
715 return (*aout_backend_info(abfd)->set_sizes) (abfd);
719 adjust_o_magic (abfd, execp)
721 struct internal_exec *execp;
723 file_ptr pos = adata (abfd).exec_bytes_size;
728 obj_textsec(abfd)->filepos = pos;
729 pos += obj_textsec(abfd)->_raw_size;
730 vma += obj_textsec(abfd)->_raw_size;
733 if (!obj_datasec(abfd)->user_set_vma)
735 #if 0 /* ?? Does alignment in the file image really matter? */
736 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
738 obj_textsec(abfd)->_raw_size += pad;
741 obj_datasec(abfd)->vma = vma;
743 obj_datasec(abfd)->filepos = pos;
744 pos += obj_datasec(abfd)->_raw_size;
745 vma += obj_datasec(abfd)->_raw_size;
748 if (!obj_bsssec(abfd)->user_set_vma)
751 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
753 obj_datasec(abfd)->_raw_size += pad;
756 obj_bsssec(abfd)->vma = vma;
758 obj_bsssec(abfd)->filepos = pos;
760 /* Fix up the exec header. */
761 execp->a_text = obj_textsec(abfd)->_raw_size;
762 execp->a_data = obj_datasec(abfd)->_raw_size;
763 execp->a_bss = obj_bsssec(abfd)->_raw_size;
764 N_SET_MAGIC (*execp, OMAGIC);
768 adjust_z_magic (abfd, execp)
770 struct internal_exec *execp;
772 bfd_size_type data_pad, text_pad;
774 CONST struct aout_backend_data *abdp;
775 int ztih; /* Nonzero if text includes exec header. */
777 abdp = aout_backend_info (abfd);
780 ztih = abdp && abdp->text_includes_header;
781 obj_textsec(abfd)->filepos = (ztih
782 ? adata(abfd).exec_bytes_size
783 : adata(abfd).page_size);
784 if (! obj_textsec(abfd)->user_set_vma)
785 /* ?? Do we really need to check for relocs here? */
786 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
789 ? (abdp->default_text_vma
790 + adata(abfd).exec_bytes_size)
791 : abdp->default_text_vma));
792 /* Could take strange alignment of text section into account here? */
794 /* Find start of data. */
795 text_end = obj_textsec(abfd)->filepos + obj_textsec(abfd)->_raw_size;
796 text_pad = BFD_ALIGN (text_end, adata(abfd).page_size) - text_end;
797 obj_textsec(abfd)->_raw_size += text_pad;
798 text_end += text_pad;
801 if (!obj_datasec(abfd)->user_set_vma)
804 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
805 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
807 if (abdp && abdp->zmagic_mapped_contiguous)
809 text_pad = (obj_datasec(abfd)->vma
810 - obj_textsec(abfd)->vma
811 - obj_textsec(abfd)->_raw_size);
812 obj_textsec(abfd)->_raw_size += text_pad;
814 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
815 + obj_textsec(abfd)->_raw_size);
817 /* Fix up exec header while we're at it. */
818 execp->a_text = obj_textsec(abfd)->_raw_size;
819 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
820 execp->a_text += adata(abfd).exec_bytes_size;
821 N_SET_MAGIC (*execp, ZMAGIC);
823 /* Spec says data section should be rounded up to page boundary. */
824 obj_datasec(abfd)->_raw_size
825 = align_power (obj_datasec(abfd)->_raw_size,
826 obj_bsssec(abfd)->alignment_power);
827 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
828 adata(abfd).page_size);
829 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
832 if (!obj_bsssec(abfd)->user_set_vma)
833 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
834 + obj_datasec(abfd)->_raw_size);
835 /* If the BSS immediately follows the data section and extra space
836 in the page is left after the data section, fudge data
837 in the header so that the bss section looks smaller by that
838 amount. We'll start the bss section there, and lie to the OS.
839 (Note that a linker script, as well as the above assignment,
840 could have explicitly set the BSS vma to immediately follow
841 the data section.) */
842 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
843 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
844 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
845 obj_bsssec(abfd)->_raw_size - data_pad;
847 execp->a_bss = obj_bsssec(abfd)->_raw_size;
851 adjust_n_magic (abfd, execp)
853 struct internal_exec *execp;
855 file_ptr pos = adata(abfd).exec_bytes_size;
860 obj_textsec(abfd)->filepos = pos;
861 if (!obj_textsec(abfd)->user_set_vma)
862 obj_textsec(abfd)->vma = vma;
864 vma = obj_textsec(abfd)->vma;
865 pos += obj_textsec(abfd)->_raw_size;
866 vma += obj_textsec(abfd)->_raw_size;
869 obj_datasec(abfd)->filepos = pos;
870 if (!obj_datasec(abfd)->user_set_vma)
871 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
872 vma = obj_datasec(abfd)->vma;
874 /* Since BSS follows data immediately, see if it needs alignment. */
875 vma += obj_datasec(abfd)->_raw_size;
876 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
877 obj_datasec(abfd)->_raw_size += pad;
878 pos += obj_datasec(abfd)->_raw_size;
881 if (!obj_bsssec(abfd)->user_set_vma)
882 obj_bsssec(abfd)->vma = vma;
884 vma = obj_bsssec(abfd)->vma;
886 /* Fix up exec header. */
887 execp->a_text = obj_textsec(abfd)->_raw_size;
888 execp->a_data = obj_datasec(abfd)->_raw_size;
889 execp->a_bss = obj_bsssec(abfd)->_raw_size;
890 N_SET_MAGIC (*execp, NMAGIC);
894 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
896 bfd_size_type *text_size;
899 struct internal_exec *execp = exec_hdr (abfd);
901 if (! NAME(aout,make_sections) (abfd))
904 if (adata(abfd).magic != undecided_magic) return true;
906 obj_textsec(abfd)->_raw_size =
907 align_power(obj_textsec(abfd)->_raw_size,
908 obj_textsec(abfd)->alignment_power);
910 *text_size = obj_textsec (abfd)->_raw_size;
911 /* Rule (heuristic) for when to pad to a new page. Note that there
912 are (at least) two ways demand-paged (ZMAGIC) files have been
913 handled. Most Berkeley-based systems start the text segment at
914 (PAGE_SIZE). However, newer versions of SUNOS start the text
915 segment right after the exec header; the latter is counted in the
916 text segment size, and is paged in by the kernel with the rest of
919 /* This perhaps isn't the right way to do this, but made it simpler for me
920 to understand enough to implement it. Better would probably be to go
921 right from BFD flags to alignment/positioning characteristics. But the
922 old code was sloppy enough about handling the flags, and had enough
923 other magic, that it was a little hard for me to understand. I think
924 I understand it better now, but I haven't time to do the cleanup this
927 if (abfd->flags & D_PAGED)
928 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
929 /* @@ What about QMAGIC? */
930 adata(abfd).magic = z_magic;
931 else if (abfd->flags & WP_TEXT)
932 adata(abfd).magic = n_magic;
934 adata(abfd).magic = o_magic;
936 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
938 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
940 switch (adata(abfd).magic) {
941 case n_magic: str = "NMAGIC"; break;
942 case o_magic: str = "OMAGIC"; break;
943 case z_magic: str = "ZMAGIC"; break;
948 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
949 obj_textsec(abfd)->alignment_power,
950 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
951 obj_datasec(abfd)->alignment_power,
952 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
953 obj_bsssec(abfd)->alignment_power);
957 switch (adata(abfd).magic)
960 adjust_o_magic (abfd, execp);
963 adjust_z_magic (abfd, execp);
966 adjust_n_magic (abfd, execp);
972 #ifdef BFD_AOUT_DEBUG
973 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
974 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
975 obj_textsec(abfd)->filepos,
976 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
977 obj_datasec(abfd)->filepos,
978 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
986 aout_@var{size}_new_section_hook
989 boolean aout_@var{size}_new_section_hook,
994 Called by the BFD in response to a @code{bfd_make_section}
998 NAME(aout,new_section_hook) (abfd, newsect)
1002 /* align to double at least */
1003 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1006 if (bfd_get_format (abfd) == bfd_object)
1008 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1009 obj_textsec(abfd)= newsect;
1010 newsect->target_index = N_TEXT;
1014 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1015 obj_datasec(abfd) = newsect;
1016 newsect->target_index = N_DATA;
1020 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1021 obj_bsssec(abfd) = newsect;
1022 newsect->target_index = N_BSS;
1028 /* We allow more than three sections internally */
1033 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1038 bfd_size_type count;
1041 bfd_size_type text_size;
1043 if (abfd->output_has_begun == false)
1045 if (NAME(aout,adjust_sizes_and_vmas) (abfd,
1047 &text_end) == false)
1051 /* regardless, once we know what we're doing, we might as well get going */
1052 if (section != obj_bsssec(abfd))
1054 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
1058 return (bfd_write ((PTR)location, 1, count, abfd) == count) ?
1066 /* Classify stabs symbols */
1068 #define sym_in_text_section(sym) \
1069 (((sym)->type & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_TEXT)
1071 #define sym_in_data_section(sym) \
1072 (((sym)->type & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_DATA)
1074 #define sym_in_bss_section(sym) \
1075 (((sym)->type & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_BSS)
1077 /* Symbol is undefined if type is N_UNDF|N_EXT and if it has
1078 zero in the "value" field. Nonzeroes there are fortrancommon
1080 #define sym_is_undefined(sym) \
1081 ((sym)->type == (N_UNDF | N_EXT) && (sym)->symbol.value == 0)
1083 /* Symbol is a global definition if N_EXT is on and if it has
1084 a nonzero type field. */
1085 #define sym_is_global_defn(sym) \
1086 (((sym)->type & N_EXT) && (sym)->type & N_TYPE)
1088 /* Symbol is debugger info if any bits outside N_TYPE or N_EXT
1090 #define sym_is_debugger_info(sym) \
1091 (((sym)->type & ~(N_EXT | N_TYPE)) || (sym)->type == N_FN)
1093 #define sym_is_fortrancommon(sym) \
1094 (((sym)->type == (N_EXT)) && (sym)->symbol.value != 0)
1096 /* Symbol is absolute if it has N_ABS set */
1097 #define sym_is_absolute(sym) \
1098 (((sym)->type & N_TYPE)== N_ABS)
1101 #define sym_is_indirect(sym) \
1102 (((sym)->type & N_ABS)== N_ABS)
1104 /* Read the external symbols from an a.out file. */
1107 aout_get_external_symbols (abfd)
1110 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1112 bfd_size_type count;
1113 struct external_nlist *syms;
1115 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1117 /* We allocate using malloc to make the values easy to free
1118 later on. If we put them on the obstack it might not be
1119 possible to free them. */
1120 syms = ((struct external_nlist *)
1121 malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1122 if (syms == (struct external_nlist *) NULL && count != 0)
1124 bfd_set_error (bfd_error_no_memory);
1128 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1129 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1130 != exec_hdr (abfd)->a_syms))
1136 obj_aout_external_syms (abfd) = syms;
1137 obj_aout_external_sym_count (abfd) = count;
1140 if (obj_aout_external_strings (abfd) == NULL)
1142 unsigned char string_chars[BYTES_IN_WORD];
1143 bfd_size_type stringsize;
1146 /* Get the size of the strings. */
1147 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1148 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1151 stringsize = GET_WORD (abfd, string_chars);
1153 strings = (char *) malloc ((size_t) stringsize + 1);
1154 if (strings == NULL)
1156 bfd_set_error (bfd_error_no_memory);
1160 /* Skip space for the string count in the buffer for convenience
1161 when using indexes. */
1162 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1164 != stringsize - BYTES_IN_WORD)
1170 /* Sanity preservation. */
1171 strings[stringsize] = '\0';
1173 obj_aout_external_strings (abfd) = strings;
1174 obj_aout_external_string_size (abfd) = stringsize;
1180 /* Only in their own functions for ease of debugging; when sym flags have
1181 stabilised these should be inlined into their (single) caller */
1184 translate_from_native_sym_flags (sym_pointer, cache_ptr, abfd)
1185 struct external_nlist *sym_pointer;
1186 aout_symbol_type * cache_ptr;
1189 cache_ptr->symbol.section = 0;
1190 switch (cache_ptr->type & N_TYPE)
1192 case N_SETA: case N_SETA | N_EXT:
1193 case N_SETT: case N_SETT | N_EXT:
1194 case N_SETD: case N_SETD | N_EXT:
1195 case N_SETB: case N_SETB | N_EXT:
1197 char *copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1199 asection *into_section;
1200 arelent_chain *reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1202 if (!copy || !reloc)
1204 bfd_set_error (bfd_error_no_memory);
1208 strcpy (copy, cache_ptr->symbol.name);
1210 /* Make sure that this bfd has a section with the right contructor
1212 section = bfd_get_section_by_name (abfd, copy);
1214 section = bfd_make_section (abfd, copy);
1216 /* Build a relocation entry for the constructor */
1217 switch ((cache_ptr->type & N_TYPE))
1219 case N_SETA: case N_SETA | N_EXT:
1220 into_section = &bfd_abs_section;
1221 cache_ptr->type = N_ABS;
1223 case N_SETT: case N_SETT | N_EXT:
1224 into_section = (asection *) obj_textsec (abfd);
1225 cache_ptr->type = N_TEXT;
1227 case N_SETD: case N_SETD | N_EXT:
1228 into_section = (asection *) obj_datasec (abfd);
1229 cache_ptr->type = N_DATA;
1231 case N_SETB: case N_SETB | N_EXT:
1232 into_section = (asection *) obj_bsssec (abfd);
1233 cache_ptr->type = N_BSS;
1236 bfd_set_error (bfd_error_bad_value);
1240 /* Build a relocation pointing into the constuctor section
1241 pointing at the symbol in the set vector specified */
1243 reloc->relent.addend = cache_ptr->symbol.value;
1244 cache_ptr->symbol.section = into_section->symbol->section;
1245 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1248 /* We modify the symbol to belong to a section depending upon the
1249 name of the symbol - probably __CTOR__ or __DTOR__ but we don't
1250 really care, and add to the size of the section to contain a
1251 pointer to the symbol. Build a reloc entry to relocate to this
1252 symbol attached to this section. */
1254 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1257 section->reloc_count++;
1258 section->alignment_power = 2;
1260 reloc->next = section->constructor_chain;
1261 section->constructor_chain = reloc;
1262 reloc->relent.address = section->_raw_size;
1263 section->_raw_size += sizeof (int *);
1266 = (obj_reloc_entry_size(abfd) == RELOC_EXT_SIZE
1267 ? howto_table_ext : howto_table_std)
1268 + CTOR_TABLE_RELOC_IDX;
1269 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1273 if (cache_ptr->type == N_WARNING)
1275 /* This symbol is the text of a warning message, the next symbol
1276 is the symbol to associate the warning with */
1277 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1279 /* @@ Stuffing pointers into integers is a no-no.
1280 We can usually get away with it if the integer is
1281 large enough though. */
1282 if (sizeof (cache_ptr + 1) > sizeof (bfd_vma))
1284 cache_ptr->symbol.value = (bfd_vma) ((cache_ptr + 1));
1286 /* We don't use a warning symbol's section, but we need
1287 it to be nonzero for the sanity check below, so
1288 pick one arbitrarily. */
1289 cache_ptr->symbol.section = &bfd_abs_section;
1291 /* We furgle with the next symbol in place.
1292 We don't want it to be undefined, we'll trample the type */
1293 (sym_pointer + 1)->e_type[0] = 0xff;
1296 if ((cache_ptr->type | N_EXT) == (N_INDR | N_EXT))
1298 /* Two symbols in a row for an INDR message. The first symbol
1299 contains the name we will match, the second symbol contains
1300 the name the first name is translated into. It is supplied to
1301 us undefined. This is good, since we want to pull in any files
1303 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT;
1305 /* @@ Stuffing pointers into integers is a no-no.
1306 We can usually get away with it if the integer is
1307 large enough though. */
1308 if (sizeof (cache_ptr + 1) > sizeof (bfd_vma))
1311 cache_ptr->symbol.value = (bfd_vma) ((cache_ptr + 1));
1312 cache_ptr->symbol.section = &bfd_ind_section;
1315 else if (sym_is_debugger_info (cache_ptr))
1317 cache_ptr->symbol.flags = BSF_DEBUGGING;
1318 /* Work out the section correct for this symbol */
1319 switch (cache_ptr->type & N_TYPE)
1323 cache_ptr->symbol.section = obj_textsec (abfd);
1324 cache_ptr->symbol.value -= obj_textsec (abfd)->vma;
1327 cache_ptr->symbol.value -= obj_datasec (abfd)->vma;
1328 cache_ptr->symbol.section = obj_datasec (abfd);
1331 cache_ptr->symbol.section = obj_bsssec (abfd);
1332 cache_ptr->symbol.value -= obj_bsssec (abfd)->vma;
1336 cache_ptr->symbol.section = &bfd_abs_section;
1343 if (sym_is_fortrancommon (cache_ptr))
1345 cache_ptr->symbol.flags = 0;
1346 cache_ptr->symbol.section = &bfd_com_section;
1354 /* In a.out, the value of a symbol is always relative to the
1355 * start of the file, if this is a data symbol we'll subtract
1356 * the size of the text section to get the section relative
1357 * value. If this is a bss symbol (which would be strange)
1358 * we'll subtract the size of the previous two sections
1359 * to find the section relative address.
1362 if (sym_in_text_section (cache_ptr))
1364 cache_ptr->symbol.value -= obj_textsec (abfd)->vma;
1365 cache_ptr->symbol.section = obj_textsec (abfd);
1367 else if (sym_in_data_section (cache_ptr))
1369 cache_ptr->symbol.value -= obj_datasec (abfd)->vma;
1370 cache_ptr->symbol.section = obj_datasec (abfd);
1372 else if (sym_in_bss_section (cache_ptr))
1374 cache_ptr->symbol.section = obj_bsssec (abfd);
1375 cache_ptr->symbol.value -= obj_bsssec (abfd)->vma;
1377 else if (sym_is_undefined (cache_ptr))
1379 cache_ptr->symbol.flags = 0;
1380 cache_ptr->symbol.section = &bfd_und_section;
1382 else if (sym_is_absolute (cache_ptr))
1384 cache_ptr->symbol.section = &bfd_abs_section;
1387 if (sym_is_global_defn (cache_ptr))
1389 cache_ptr->symbol.flags = BSF_GLOBAL | BSF_EXPORT;
1391 else if (! sym_is_undefined (cache_ptr))
1393 cache_ptr->symbol.flags = BSF_LOCAL;
1397 if (cache_ptr->symbol.section == 0)
1404 translate_to_native_sym_flags (sym_pointer, cache_ptr, abfd)
1405 struct external_nlist *sym_pointer;
1409 bfd_vma value = cache_ptr->value;
1411 /* mask out any existing type bits in case copying from one section
1413 sym_pointer->e_type[0] &= ~N_TYPE;
1415 /* We attempt to order these tests by decreasing frequency of success,
1416 according to tcov when linking the linker. */
1417 if (bfd_get_output_section(cache_ptr) == &bfd_abs_section) {
1418 sym_pointer->e_type[0] |= N_ABS;
1420 else if (bfd_get_output_section(cache_ptr) == obj_textsec (abfd)) {
1421 sym_pointer->e_type[0] |= N_TEXT;
1423 else if (bfd_get_output_section(cache_ptr) == obj_datasec (abfd)) {
1424 sym_pointer->e_type[0] |= N_DATA;
1426 else if (bfd_get_output_section(cache_ptr) == obj_bsssec (abfd)) {
1427 sym_pointer->e_type[0] |= N_BSS;
1429 else if (bfd_get_output_section(cache_ptr) == &bfd_und_section) {
1430 sym_pointer->e_type[0] = (N_UNDF | N_EXT);
1432 else if (bfd_get_output_section(cache_ptr) == &bfd_ind_section) {
1433 sym_pointer->e_type[0] = N_INDR;
1435 else if (bfd_get_output_section(cache_ptr) == NULL) {
1436 /* Protect the bfd_is_com_section call.
1437 This case occurs, e.g., for the *DEBUG* section of a COFF file. */
1438 bfd_set_error (bfd_error_nonrepresentable_section);
1441 else if (bfd_is_com_section (bfd_get_output_section (cache_ptr))) {
1442 sym_pointer->e_type[0] = (N_UNDF | N_EXT);
1445 bfd_set_error (bfd_error_nonrepresentable_section);
1449 /* Turn the symbol from section relative to absolute again */
1451 value += cache_ptr->section->output_section->vma + cache_ptr->section->output_offset ;
1454 if (cache_ptr->flags & (BSF_WARNING)) {
1455 sym_pointer->e_type[0] = N_WARNING;
1456 (sym_pointer+1)->e_type[0] = 1;
1459 if (cache_ptr->flags & BSF_DEBUGGING) {
1460 sym_pointer->e_type[0] = ((aout_symbol_type *)cache_ptr)->type;
1462 else if (cache_ptr->flags & (BSF_GLOBAL | BSF_EXPORT)) {
1463 sym_pointer->e_type[0] |= N_EXT;
1465 if (cache_ptr->flags & BSF_CONSTRUCTOR) {
1466 int type = ((aout_symbol_type *)cache_ptr)->type;
1469 case N_ABS: type = N_SETA; break;
1470 case N_TEXT: type = N_SETT; break;
1471 case N_DATA: type = N_SETD; break;
1472 case N_BSS: type = N_SETB; break;
1474 sym_pointer->e_type[0] = type;
1477 PUT_WORD(abfd, value, sym_pointer->e_value);
1482 /* Native-level interface to symbols. */
1486 NAME(aout,make_empty_symbol) (abfd)
1489 aout_symbol_type *new =
1490 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1493 bfd_set_error (bfd_error_no_memory);
1496 new->symbol.the_bfd = abfd;
1498 return &new->symbol;
1501 /* Translate a set of internal symbols into external symbols. */
1504 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1506 aout_symbol_type *in;
1507 struct external_nlist *ext;
1508 bfd_size_type count;
1510 bfd_size_type strsize;
1513 struct external_nlist *ext_end;
1515 ext_end = ext + count;
1516 for (; ext < ext_end; ext++, in++)
1520 x = GET_WORD (abfd, ext->e_strx);
1521 in->symbol.the_bfd = abfd;
1523 /* For the normal symbols, the zero index points at the number
1524 of bytes in the string table but is to be interpreted as the
1525 null string. For the dynamic symbols, the number of bytes in
1526 the string table is stored in the __DYNAMIC structure and the
1527 zero index points at an actual string. */
1528 if (x == 0 && ! dynamic)
1529 in->symbol.name = "";
1530 else if (x < strsize)
1531 in->symbol.name = str + x;
1535 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1536 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1537 in->other = bfd_h_get_8 (abfd, ext->e_other);
1538 in->type = bfd_h_get_8 (abfd, ext->e_type);
1539 in->symbol.udata = 0;
1541 if (!translate_from_native_sym_flags (ext, in, abfd))
1545 in->symbol.flags |= BSF_DYNAMIC;
1551 /* We read the symbols into a buffer, which is discarded when this
1552 function exits. We read the strings into a buffer large enough to
1553 hold them all plus all the cached symbol entries. */
1556 NAME(aout,slurp_symbol_table) (abfd)
1559 struct external_nlist *old_external_syms;
1560 aout_symbol_type *cached;
1563 /* If there's no work to be done, don't do any */
1564 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1567 old_external_syms = obj_aout_external_syms (abfd);
1569 if (! aout_get_external_symbols (abfd))
1572 if (obj_aout_external_sym_count (abfd) == 0)
1574 bfd_set_error (bfd_error_no_symbols);
1578 cached_size = (obj_aout_external_sym_count (abfd)
1579 * sizeof (aout_symbol_type));
1580 cached = (aout_symbol_type *) malloc (cached_size);
1583 bfd_set_error (bfd_error_no_memory);
1586 memset (cached, 0, cached_size);
1588 /* Convert from external symbol information to internal. */
1589 if (! (NAME(aout,translate_symbol_table)
1591 obj_aout_external_syms (abfd),
1592 obj_aout_external_sym_count (abfd),
1593 obj_aout_external_strings (abfd),
1594 obj_aout_external_string_size (abfd),
1601 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1603 obj_aout_symbols (abfd) = cached;
1605 /* It is very likely that anybody who calls this function will not
1606 want the external symbol information, so if it was allocated
1607 because of our call to aout_get_external_symbols, we free it up
1608 right away to save space. */
1609 if (old_external_syms == (struct external_nlist *) NULL
1610 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1612 free (obj_aout_external_syms (abfd));
1613 obj_aout_external_syms (abfd) = NULL;
1619 /* Possible improvements:
1620 + look for strings matching trailing substrings of other strings
1621 + better data structures? balanced trees?
1622 + smaller per-string or per-symbol data? re-use some of the symbol's
1624 + also look at reducing memory use elsewhere -- maybe if we didn't have to
1625 construct the entire symbol table at once, we could get by with smaller
1626 amounts of VM? (What effect does that have on the string table
1628 + rip this out of here, put it into its own file in bfd or libiberty, so
1629 coff and elf can use it too. I'll work on this soon, but have more
1630 pressing tasks right now.
1632 A hash table might(?) be more efficient for handling exactly the cases that
1633 are handled now, but for trailing substring matches, I think we want to
1634 examine the `nearest' values (reverse-)lexically, not merely impose a strict
1635 order, nor look only for exact-match or not-match. I don't think a hash
1636 table would be very useful for that, and I don't feel like fleshing out two
1637 completely different implementations. [raeburn:930419.0331EDT] */
1639 struct stringtab_entry {
1640 /* Hash value for this string. Only useful so long as we aren't doing
1641 substring matches. */
1644 /* Next node to look at, depending on whether the hash value of the string
1645 being searched for is less than or greater than the hash value of the
1646 current node. For now, `equal to' is lumped in with `greater than', for
1647 space efficiency. It's not a common enough case to warrant another field
1648 to be used for all nodes. */
1649 struct stringtab_entry *less;
1650 struct stringtab_entry *greater;
1652 /* The string itself. */
1655 /* The index allocated for this string. */
1656 bfd_size_type index;
1658 #ifdef GATHER_STATISTICS
1659 /* How many references have there been to this string? (Not currently used;
1660 could be dumped out for anaylsis, if anyone's interested.) */
1661 unsigned long count;
1664 /* Next node in linked list, in suggested output order. */
1665 struct stringtab_entry *next_to_output;
1668 struct stringtab_data {
1669 /* Tree of string table entries. */
1670 struct stringtab_entry *strings;
1672 /* Fudge factor used to center top node of tree. */
1675 /* Next index value to issue. */
1676 bfd_size_type index;
1678 /* Index used for empty strings. Cached here because checking for them
1679 is really easy, and we can avoid searching the tree. */
1680 bfd_size_type empty_string_index;
1682 /* These fields indicate the two ends of a singly-linked list that indicates
1683 the order strings should be written out in. Use this order, and no
1684 seeking will need to be done, so output efficiency should be maximized. */
1685 struct stringtab_entry **end;
1686 struct stringtab_entry *output_order;
1688 #ifdef GATHER_STATISTICS
1689 /* Number of strings which duplicate strings already in the table. */
1690 unsigned long duplicates;
1692 /* Number of bytes saved by not having to write all the duplicate strings. */
1693 unsigned long bytes_saved;
1695 /* Number of zero-length strings. Currently, these all turn into
1696 references to the null byte at the end of the first string. In some
1697 cases (possibly not all? explore this...), it should be possible to
1698 simply write out a zero index value. */
1699 unsigned long empty_strings;
1701 /* Number of times the hash values matched but the strings were different.
1702 Note that this includes the number of times the other string(s) occurs, so
1703 there may only be two strings hashing to the same value, even if this
1704 number is very large. */
1705 unsigned long bad_hash_matches;
1707 /* Null strings aren't counted in this one.
1708 This will probably only be nonzero if we've got an input file
1709 which was produced by `ld -r' (i.e., it's already been processed
1710 through this code). Under some operating systems, native tools
1711 may make all empty strings have the same index; but the pointer
1712 check won't catch those, because to get to that stage we'd already
1713 have to compute the checksum, which requires reading the string,
1714 so we short-circuit that case with empty_string_index above. */
1715 unsigned long pointer_matches;
1717 /* Number of comparisons done. I figure with the algorithms in use below,
1718 the average number of comparisons done (per symbol) should be roughly
1719 log-base-2 of the number of unique strings. */
1720 unsigned long n_compares;
1724 /* Some utility functions for the string table code. */
1726 /* For speed, only hash on the first this many bytes of strings.
1727 This number was chosen by profiling ld linking itself, with -g. */
1728 #define HASHMAXLEN 25
1730 #define HASH_CHAR(c) (sum ^= sum >> 20, sum ^= sum << 7, sum += (c))
1732 static INLINE unsigned int
1734 unsigned char *string;
1735 register unsigned int len;
1737 register unsigned int sum = 0;
1739 if (len > HASHMAXLEN)
1747 HASH_CHAR (*string++);
1753 stringtab_init (tab)
1754 struct stringtab_data *tab;
1757 tab->output_order = 0;
1759 tab->end = &tab->output_order;
1761 /* Initial string table length includes size of length field. */
1762 tab->index = BYTES_IN_WORD;
1763 tab->empty_string_index = -1;
1764 #ifdef GATHER_STATISTICS
1765 tab->duplicates = 0;
1766 tab->empty_strings = 0;
1767 tab->bad_hash_matches = 0;
1768 tab->pointer_matches = 0;
1769 tab->bytes_saved = 0;
1770 tab->n_compares = 0;
1775 compare (entry, str, hash)
1776 struct stringtab_entry *entry;
1780 return hash - entry->hash;
1783 #ifdef GATHER_STATISTICS
1784 /* Don't want to have to link in math library with all bfd applications... */
1785 static INLINE double
1793 return ((d > 1.41) ? 0.5 : 0) + n;
1797 /* Main string table routines. */
1798 /* Returns index in string table. Whether or not this actually adds an
1799 entry into the string table should be irrelevant -- it just has to
1800 return a valid index. */
1801 static bfd_size_type
1802 add_to_stringtab (abfd, str, tab)
1805 struct stringtab_data *tab;
1807 struct stringtab_entry **ep;
1808 register struct stringtab_entry *entry;
1809 unsigned int hashval, len;
1813 bfd_size_type index;
1814 CONST bfd_size_type minus_one = -1;
1816 #ifdef GATHER_STATISTICS
1817 tab->empty_strings++;
1819 index = tab->empty_string_index;
1820 if (index != minus_one)
1823 #ifdef GATHER_STATISTICS
1830 /* Need to find it. */
1831 entry = tab->strings;
1834 index = entry->index + strlen (entry->string);
1835 tab->empty_string_index = index;
1843 /* The hash_zero value is chosen such that the first symbol gets a value of
1844 zero. With a balanced tree, this wouldn't be very useful, but without it,
1845 we might get a more even split at the top level, instead of skewing it
1846 badly should hash("/usr/lib/crt0.o") (or whatever) be far from zero. */
1847 hashval = hash (str, len) ^ tab->hash_zero;
1851 tab->hash_zero = hashval;
1861 #ifdef GATHER_STATISTICS
1864 cmp = compare (entry, str, hashval);
1865 /* The not-equal cases are more frequent, so check them first. */
1867 ep = &entry->greater;
1872 if (entry->string == str)
1874 #ifdef GATHER_STATISTICS
1875 tab->pointer_matches++;
1879 /* Compare the first bytes to save a function call if they
1881 if (entry->string[0] == str[0] && !strcmp (entry->string, str))
1884 #ifdef GATHER_STATISTICS
1886 tab->bytes_saved += len + 1;
1889 /* If we're in the linker, and the new string is from a new
1890 input file which might have already had these reductions
1891 run over it, we want to keep the new string pointer. I
1892 don't think we're likely to see any (or nearly as many,
1893 at least) cases where a later string is in the same location
1894 as an earlier one rather than this one. */
1895 entry->string = str;
1896 return entry->index;
1898 #ifdef GATHER_STATISTICS
1899 tab->bad_hash_matches++;
1901 ep = &entry->greater;
1905 /* If we get here, nothing that's in the table already matched.
1906 EP points to the `next' field at the end of the chain; stick a
1907 new entry on here. */
1909 entry = (struct stringtab_entry *)
1910 bfd_alloc_by_size_t (abfd, sizeof (struct stringtab_entry));
1913 bfd_set_error (bfd_error_no_memory);
1914 abort(); /* FIXME */
1917 entry->less = entry->greater = 0;
1918 entry->hash = hashval;
1919 entry->index = tab->index;
1920 entry->string = str;
1921 entry->next_to_output = 0;
1922 #ifdef GATHER_STATISTICS
1926 BFD_ASSERT (*tab->end == 0);
1927 *(tab->end) = entry;
1928 tab->end = &entry->next_to_output;
1929 BFD_ASSERT (*tab->end == 0);
1932 tab->index += len + 1;
1934 tab->empty_string_index = entry->index;
1936 BFD_ASSERT (*ep == 0);
1938 return entry->index;
1942 emit_strtab (abfd, tab)
1944 struct stringtab_data *tab;
1946 struct stringtab_entry *entry;
1947 #ifdef GATHER_STATISTICS
1951 /* Be sure to put string length into correct byte ordering before writing
1953 char buffer[BYTES_IN_WORD];
1955 PUT_WORD (abfd, tab->index, (unsigned char *) buffer);
1956 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1959 for (entry = tab->output_order; entry; entry = entry->next_to_output)
1961 size_t len = strlen (entry->string) + 1;
1963 if (bfd_write ((PTR) entry->string, 1, len, abfd) != len)
1966 #ifdef GATHER_STATISTICS
1971 #ifdef GATHER_STATISTICS
1972 /* Short form only, for now.
1973 To do: Specify output file. Conditionalize on environment? Detailed
1974 analysis if desired. */
1976 int n_syms = bfd_get_symcount (abfd);
1978 fprintf (stderr, "String table data for output file:\n");
1979 fprintf (stderr, " %8d symbols output\n", n_syms);
1980 fprintf (stderr, " %8d duplicate strings\n", tab->duplicates);
1981 fprintf (stderr, " %8d empty strings\n", tab->empty_strings);
1982 fprintf (stderr, " %8d unique strings output\n", count);
1983 fprintf (stderr, " %8d pointer matches\n", tab->pointer_matches);
1984 fprintf (stderr, " %8d bytes saved\n", tab->bytes_saved);
1985 fprintf (stderr, " %8d bad hash matches\n", tab->bad_hash_matches);
1986 fprintf (stderr, " %8d hash-val comparisons\n", tab->n_compares);
1989 double n_compares = tab->n_compares;
1990 double avg_compares = n_compares / n_syms;
1991 /* The second value here should usually be near one. */
1993 "\t average %f comparisons per symbol (%f * log2 nstrings)\n",
1994 avg_compares, avg_compares / log2 (count));
2001 generic = bfd_get_outsymbols(abfd);
2002 for (count = 0; count < bfd_get_symcount(abfd); count++)
2004 asymbol *g = *(generic++);
2008 size_t length = strlen(g->name)+1;
2009 bfd_write((PTR)g->name, 1, length, abfd);
2011 g->KEEPIT = (KEEPITTYPE) count;
2018 NAME(aout,write_syms) (abfd)
2021 unsigned int count ;
2022 asymbol **generic = bfd_get_outsymbols (abfd);
2023 struct stringtab_data strtab;
2025 stringtab_init (&strtab);
2027 for (count = 0; count < bfd_get_symcount (abfd); count++)
2029 asymbol *g = generic[count];
2030 struct external_nlist nsp;
2033 PUT_WORD (abfd, add_to_stringtab (abfd, g->name, &strtab),
2034 (unsigned char *) nsp.e_strx);
2036 PUT_WORD (abfd, 0, (unsigned char *)nsp.e_strx);
2038 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
2040 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
2041 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
2042 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
2046 bfd_h_put_16(abfd,0, nsp.e_desc);
2047 bfd_h_put_8(abfd, 0, nsp.e_other);
2048 bfd_h_put_8(abfd, 0, nsp.e_type);
2051 if (! translate_to_native_sym_flags (&nsp, g, abfd))
2054 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
2055 != EXTERNAL_NLIST_SIZE)
2058 /* NB: `KEEPIT' currently overlays `flags', so set this only
2059 here, at the end. */
2063 return emit_strtab (abfd, &strtab);
2068 NAME(aout,get_symtab) (abfd, location)
2072 unsigned int counter = 0;
2073 aout_symbol_type *symbase;
2075 if (!NAME(aout,slurp_symbol_table)(abfd))
2078 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
2079 *(location++) = (asymbol *)( symbase++);
2081 return bfd_get_symcount (abfd);
2085 /* Standard reloc stuff */
2086 /* Output standard relocation information to a file in target byte order. */
2089 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
2092 struct reloc_std_external *natptr;
2095 asymbol *sym = *(g->sym_ptr_ptr);
2097 unsigned int r_length;
2099 int r_baserel, r_jmptable, r_relative;
2100 asection *output_section = sym->section->output_section;
2102 PUT_WORD(abfd, g->address, natptr->r_address);
2104 r_length = g->howto->size ; /* Size as a power of two */
2105 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
2106 /* XXX This relies on relocs coming from a.out files. */
2107 r_baserel = (g->howto->type & 8) != 0;
2108 r_jmptable = (g->howto->type & 16) != 0;
2109 r_relative = (g->howto->type & 32) != 0;
2112 /* For a standard reloc, the addend is in the object file. */
2113 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
2116 /* name was clobbered by aout_write_syms to be symbol index */
2118 /* If this relocation is relative to a symbol then set the
2119 r_index to the symbols index, and the r_extern bit.
2121 Absolute symbols can come in in two ways, either as an offset
2122 from the abs section, or as a symbol which has an abs value.
2127 if (bfd_is_com_section (output_section)
2128 || output_section == &bfd_abs_section
2129 || output_section == &bfd_und_section)
2131 if (bfd_abs_section.symbol == sym)
2133 /* Whoops, looked like an abs symbol, but is really an offset
2134 from the abs section */
2140 /* Fill in symbol */
2142 r_index = stoi((*(g->sym_ptr_ptr))->KEEPIT);
2148 /* Just an ordinary section */
2150 r_index = output_section->target_index;
2153 /* now the fun stuff */
2154 if (abfd->xvec->header_byteorder_big_p != false) {
2155 natptr->r_index[0] = r_index >> 16;
2156 natptr->r_index[1] = r_index >> 8;
2157 natptr->r_index[2] = r_index;
2159 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
2160 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
2161 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
2162 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
2163 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
2164 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
2166 natptr->r_index[2] = r_index >> 16;
2167 natptr->r_index[1] = r_index >> 8;
2168 natptr->r_index[0] = r_index;
2170 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
2171 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
2172 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
2173 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
2174 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2175 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2180 /* Extended stuff */
2181 /* Output extended relocation information to a file in target byte order. */
2184 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2187 register struct reloc_ext_external *natptr;
2191 unsigned int r_type;
2192 unsigned int r_addend;
2193 asymbol *sym = *(g->sym_ptr_ptr);
2194 asection *output_section = sym->section->output_section;
2196 PUT_WORD (abfd, g->address, natptr->r_address);
2198 r_type = (unsigned int) g->howto->type;
2200 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
2202 /* If this relocation is relative to a symbol then set the
2203 r_index to the symbols index, and the r_extern bit.
2205 Absolute symbols can come in in two ways, either as an offset
2206 from the abs section, or as a symbol which has an abs value.
2207 check for that here. */
2209 if (bfd_is_com_section (output_section)
2210 || output_section == &bfd_abs_section
2211 || output_section == &bfd_und_section)
2213 if (bfd_abs_section.symbol == sym)
2215 /* Whoops, looked like an abs symbol, but is really an offset
2216 from the abs section */
2223 r_index = stoi((*(g->sym_ptr_ptr))->KEEPIT);
2228 /* Just an ordinary section */
2230 r_index = output_section->target_index;
2233 /* now the fun stuff */
2234 if (abfd->xvec->header_byteorder_big_p != false) {
2235 natptr->r_index[0] = r_index >> 16;
2236 natptr->r_index[1] = r_index >> 8;
2237 natptr->r_index[2] = r_index;
2239 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2240 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2242 natptr->r_index[2] = r_index >> 16;
2243 natptr->r_index[1] = r_index >> 8;
2244 natptr->r_index[0] = r_index;
2246 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2247 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2250 PUT_WORD (abfd, r_addend, natptr->r_addend);
2253 /* BFD deals internally with all things based from the section they're
2254 in. so, something in 10 bytes into a text section with a base of
2255 50 would have a symbol (.text+10) and know .text vma was 50.
2257 Aout keeps all it's symbols based from zero, so the symbol would
2258 contain 60. This macro subs the base of each section from the value
2259 to give the true offset from the section */
2262 #define MOVE_ADDRESS(ad) \
2264 /* undefined symbol */ \
2265 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2266 cache_ptr->addend = ad; \
2268 /* defined, section relative. replace symbol with pointer to \
2269 symbol which points to section */ \
2270 switch (r_index) { \
2272 case N_TEXT | N_EXT: \
2273 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2274 cache_ptr->addend = ad - su->textsec->vma; \
2277 case N_DATA | N_EXT: \
2278 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2279 cache_ptr->addend = ad - su->datasec->vma; \
2282 case N_BSS | N_EXT: \
2283 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2284 cache_ptr->addend = ad - su->bsssec->vma; \
2288 case N_ABS | N_EXT: \
2289 cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; \
2290 cache_ptr->addend = ad; \
2296 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols)
2298 struct reloc_ext_external *bytes;
2304 unsigned int r_type;
2305 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2307 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2309 /* now the fun stuff */
2310 if (abfd->xvec->header_byteorder_big_p != false) {
2311 r_index = (bytes->r_index[0] << 16)
2312 | (bytes->r_index[1] << 8)
2313 | bytes->r_index[2];
2314 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2315 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2316 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2318 r_index = (bytes->r_index[2] << 16)
2319 | (bytes->r_index[1] << 8)
2320 | bytes->r_index[0];
2321 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2322 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2323 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2326 cache_ptr->howto = howto_table_ext + r_type;
2327 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2331 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols)
2333 struct reloc_std_external *bytes;
2339 unsigned int r_length;
2341 int r_baserel, r_jmptable, r_relative;
2342 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2345 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2347 /* now the fun stuff */
2348 if (abfd->xvec->header_byteorder_big_p != false) {
2349 r_index = (bytes->r_index[0] << 16)
2350 | (bytes->r_index[1] << 8)
2351 | bytes->r_index[2];
2352 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2353 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2354 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2355 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2356 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2357 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2358 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2360 r_index = (bytes->r_index[2] << 16)
2361 | (bytes->r_index[1] << 8)
2362 | bytes->r_index[0];
2363 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2364 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2365 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2366 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2367 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2368 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2369 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2372 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2373 + 16 * r_jmptable + 32 * r_relative;
2374 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2375 cache_ptr->howto = howto_table_std + howto_idx;
2376 BFD_ASSERT (cache_ptr->howto->type != -1);
2381 /* Read and swap the relocs for a section. */
2384 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2390 bfd_size_type reloc_size;
2392 arelent *reloc_cache;
2394 unsigned int counter = 0;
2397 if (asect->relocation)
2400 if (asect->flags & SEC_CONSTRUCTOR)
2403 if (asect == obj_datasec (abfd))
2404 reloc_size = exec_hdr(abfd)->a_drsize;
2405 else if (asect == obj_textsec (abfd))
2406 reloc_size = exec_hdr(abfd)->a_trsize;
2409 bfd_set_error (bfd_error_invalid_operation);
2413 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2416 each_size = obj_reloc_entry_size (abfd);
2418 count = reloc_size / each_size;
2420 reloc_cache = (arelent *) malloc ((size_t) (count * sizeof (arelent)));
2421 if (reloc_cache == NULL && count != 0)
2423 bfd_set_error (bfd_error_no_memory);
2426 memset (reloc_cache, 0, count * sizeof (arelent));
2428 relocs = malloc (reloc_size);
2429 if (relocs == NULL && reloc_size != 0)
2432 bfd_set_error (bfd_error_no_memory);
2436 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2443 cache_ptr = reloc_cache;
2444 if (each_size == RELOC_EXT_SIZE)
2446 register struct reloc_ext_external *rptr =
2447 (struct reloc_ext_external *) relocs;
2449 for (; counter < count; counter++, rptr++, cache_ptr++)
2450 NAME(aout,swap_ext_reloc_in) (abfd, rptr, cache_ptr, symbols);
2454 register struct reloc_std_external *rptr =
2455 (struct reloc_std_external *) relocs;
2457 for (; counter < count; counter++, rptr++, cache_ptr++)
2458 NAME(aout,swap_std_reloc_in) (abfd, rptr, cache_ptr, symbols);
2463 asect->relocation = reloc_cache;
2464 asect->reloc_count = cache_ptr - reloc_cache;
2469 /* Write out a relocation section into an object file. */
2472 NAME(aout,squirt_out_relocs) (abfd, section)
2477 unsigned char *native, *natptr;
2480 unsigned int count = section->reloc_count;
2483 if (count == 0) return true;
2485 each_size = obj_reloc_entry_size (abfd);
2486 natsize = each_size * count;
2487 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2489 bfd_set_error (bfd_error_no_memory);
2493 generic = section->orelocation;
2495 if (each_size == RELOC_EXT_SIZE)
2497 for (natptr = native;
2499 --count, natptr += each_size, ++generic)
2500 NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr);
2504 for (natptr = native;
2506 --count, natptr += each_size, ++generic)
2507 NAME(aout,swap_std_reloc_out)(abfd, *generic, (struct reloc_std_external *)natptr);
2510 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
2511 bfd_release(abfd, native);
2514 bfd_release (abfd, native);
2519 /* This is stupid. This function should be a boolean predicate */
2521 NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2527 arelent *tblptr = section->relocation;
2530 if (!(tblptr || NAME(aout,slurp_reloc_table)(abfd, section, symbols)))
2533 if (section->flags & SEC_CONSTRUCTOR) {
2534 arelent_chain *chain = section->constructor_chain;
2535 for (count = 0; count < section->reloc_count; count ++) {
2536 *relptr ++ = &chain->relent;
2537 chain = chain->next;
2541 tblptr = section->relocation;
2543 for (count = 0; count++ < section->reloc_count;)
2545 *relptr++ = tblptr++;
2550 return section->reloc_count;
2554 NAME(aout,get_reloc_upper_bound) (abfd, asect)
2558 if (bfd_get_format (abfd) != bfd_object) {
2559 bfd_set_error (bfd_error_invalid_operation);
2562 if (asect->flags & SEC_CONSTRUCTOR) {
2563 return (sizeof (arelent *) * (asect->reloc_count+1));
2566 if (asect == obj_datasec (abfd))
2567 return (sizeof (arelent *)
2568 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
2571 if (asect == obj_textsec (abfd))
2572 return (sizeof (arelent *)
2573 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
2576 bfd_set_error (bfd_error_invalid_operation);
2582 NAME(aout,get_symtab_upper_bound) (abfd)
2585 if (!NAME(aout,slurp_symbol_table)(abfd))
2588 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2593 NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
2595 asymbol *ignore_symbol;
2597 return (alent *)NULL;
2602 NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
2607 bfd_symbol_info (symbol, ret);
2609 if (ret->type == '?')
2611 int type_code = aout_symbol(symbol)->type & 0xff;
2612 CONST char *stab_name = aout_stab_name(type_code);
2613 static char buf[10];
2615 if (stab_name == NULL)
2617 sprintf(buf, "(%d)", type_code);
2621 ret->stab_other = (unsigned)(aout_symbol(symbol)->other & 0xff);
2622 ret->stab_desc = (unsigned)(aout_symbol(symbol)->desc & 0xffff);
2623 ret->stab_name = stab_name;
2629 NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
2633 bfd_print_symbol_type how;
2635 FILE *file = (FILE *)afile;
2638 case bfd_print_symbol_name:
2640 fprintf(file,"%s", symbol->name);
2642 case bfd_print_symbol_more:
2643 fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff),
2644 (unsigned)(aout_symbol(symbol)->other & 0xff),
2645 (unsigned)(aout_symbol(symbol)->type));
2647 case bfd_print_symbol_all:
2649 CONST char *section_name = symbol->section->name;
2652 bfd_print_symbol_vandf((PTR)file,symbol);
2654 fprintf(file," %-5s %04x %02x %02x",
2656 (unsigned)(aout_symbol(symbol)->desc & 0xffff),
2657 (unsigned)(aout_symbol(symbol)->other & 0xff),
2658 (unsigned)(aout_symbol(symbol)->type & 0xff));
2660 fprintf(file," %s", symbol->name);
2667 provided a BFD, a section and an offset into the section, calculate
2668 and return the name of the source file and the line nearest to the
2673 NAME(aout,find_nearest_line)
2674 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2679 CONST char **filename_ptr;
2680 CONST char **functionname_ptr;
2681 unsigned int *line_ptr;
2683 /* Run down the file looking for the filename, function and linenumber */
2685 static char buffer[100];
2686 static char filename_buffer[200];
2687 CONST char *directory_name = NULL;
2688 CONST char *main_file_name = NULL;
2689 CONST char *current_file_name = NULL;
2690 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2691 bfd_vma high_line_vma = ~0;
2692 bfd_vma low_func_vma = 0;
2694 *filename_ptr = abfd->filename;
2695 *functionname_ptr = 0;
2697 if (symbols != (asymbol **)NULL) {
2698 for (p = symbols; *p; p++) {
2699 aout_symbol_type *q = (aout_symbol_type *)(*p);
2703 main_file_name = current_file_name = q->symbol.name;
2704 /* Look ahead to next symbol to check if that too is an N_SO. */
2708 q = (aout_symbol_type *)(*p);
2709 if (q->type != (int)N_SO)
2712 /* Found a second N_SO First is directory; second is filename. */
2713 directory_name = current_file_name;
2714 main_file_name = current_file_name = q->symbol.name;
2715 if (obj_textsec(abfd) != section)
2719 current_file_name = q->symbol.name;
2726 /* We'll keep this if it resolves nearer than the one we have already */
2727 if (q->symbol.value >= offset &&
2728 q->symbol.value < high_line_vma) {
2729 *line_ptr = q->desc;
2730 high_line_vma = q->symbol.value;
2731 line_file_name = current_file_name;
2736 /* We'll keep this if it is nearer than the one we have already */
2737 if (q->symbol.value >= low_func_vma &&
2738 q->symbol.value <= offset) {
2739 low_func_vma = q->symbol.value;
2740 func = (asymbol *)q;
2742 if (*line_ptr && func) {
2743 CONST char *function = func->name;
2746 /* The caller expects a symbol name. We actually have a
2747 function name, without the leading underscore. Put the
2748 underscore back in, so that the caller gets a symbol
2750 if (bfd_get_symbol_leading_char (abfd) == '\0')
2751 strncpy (buffer, function, sizeof (buffer) - 1);
2754 buffer[0] = bfd_get_symbol_leading_char (abfd);
2755 strncpy (buffer + 1, function, sizeof (buffer) - 2);
2757 buffer[sizeof(buffer)-1] = 0;
2758 /* Have to remove : stuff */
2759 p = strchr(buffer,':');
2760 if (p != NULL) { *p = '\0'; }
2761 *functionname_ptr = buffer;
2773 main_file_name = line_file_name;
2774 if (main_file_name) {
2775 if (main_file_name[0] == '/' || directory_name == NULL)
2776 *filename_ptr = main_file_name;
2778 sprintf(filename_buffer, "%.140s%.50s",
2779 directory_name, main_file_name);
2780 *filename_ptr = filename_buffer;
2789 NAME(aout,sizeof_headers) (abfd, execable)
2793 return adata(abfd).exec_bytes_size;
2796 /* Free all information we have cached for this BFD. We can always
2797 read it again later if we need it. */
2800 NAME(aout,bfd_free_cached_info) (abfd)
2805 if (bfd_get_format (abfd) != bfd_object)
2808 #define FREE(x) if (x != NULL) { free (x); x = NULL; }
2809 FREE (obj_aout_symbols (abfd));
2810 FREE (obj_aout_external_syms (abfd));
2811 FREE (obj_aout_external_strings (abfd));
2812 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2813 FREE (o->relocation);
2819 /* a.out link code. */
2821 static boolean aout_link_add_object_symbols
2822 PARAMS ((bfd *, struct bfd_link_info *));
2823 static boolean aout_link_check_archive_element
2824 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2825 static boolean aout_link_free_symbols PARAMS ((bfd *));
2826 static boolean aout_link_check_ar_symbols
2827 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2828 static boolean aout_link_add_symbols
2829 PARAMS ((bfd *, struct bfd_link_info *));
2831 /* Routine to create an entry in an a.out link hash table. */
2833 struct bfd_hash_entry *
2834 NAME(aout,link_hash_newfunc) (entry, table, string)
2835 struct bfd_hash_entry *entry;
2836 struct bfd_hash_table *table;
2839 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2841 /* Allocate the structure if it has not already been allocated by a
2843 if (ret == (struct aout_link_hash_entry *) NULL)
2844 ret = ((struct aout_link_hash_entry *)
2845 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2846 if (ret == (struct aout_link_hash_entry *) NULL)
2848 bfd_set_error (bfd_error_no_memory);
2849 return (struct bfd_hash_entry *) ret;
2852 /* Call the allocation method of the superclass. */
2853 ret = ((struct aout_link_hash_entry *)
2854 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2858 /* Set local fields. */
2859 ret->written = false;
2863 return (struct bfd_hash_entry *) ret;
2866 /* Initialize an a.out link hash table. */
2869 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2870 struct aout_link_hash_table *table;
2872 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2873 struct bfd_hash_table *,
2876 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2879 /* Create an a.out link hash table. */
2881 struct bfd_link_hash_table *
2882 NAME(aout,link_hash_table_create) (abfd)
2885 struct aout_link_hash_table *ret;
2887 ret = ((struct aout_link_hash_table *)
2888 malloc (sizeof (struct aout_link_hash_table)));
2889 if (ret == (struct aout_link_hash_table *) NULL)
2891 bfd_set_error (bfd_error_no_memory);
2892 return (struct bfd_link_hash_table *) NULL;
2894 if (! NAME(aout,link_hash_table_init) (ret, abfd,
2895 NAME(aout,link_hash_newfunc)))
2898 return (struct bfd_link_hash_table *) NULL;
2903 /* Given an a.out BFD, add symbols to the global hash table as
2907 NAME(aout,link_add_symbols) (abfd, info)
2909 struct bfd_link_info *info;
2911 switch (bfd_get_format (abfd))
2914 return aout_link_add_object_symbols (abfd, info);
2916 return _bfd_generic_link_add_archive_symbols
2917 (abfd, info, aout_link_check_archive_element);
2919 bfd_set_error (bfd_error_wrong_format);
2924 /* Add symbols from an a.out object file. */
2927 aout_link_add_object_symbols (abfd, info)
2929 struct bfd_link_info *info;
2931 if (! aout_get_external_symbols (abfd))
2933 if (! aout_link_add_symbols (abfd, info))
2935 if (! info->keep_memory)
2937 if (! aout_link_free_symbols (abfd))
2943 /* Check a single archive element to see if we need to include it in
2944 the link. *PNEEDED is set according to whether this element is
2945 needed in the link or not. This is called from
2946 _bfd_generic_link_add_archive_symbols. */
2949 aout_link_check_archive_element (abfd, info, pneeded)
2951 struct bfd_link_info *info;
2954 if (! aout_get_external_symbols (abfd))
2957 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
2962 if (! aout_link_add_symbols (abfd, info))
2966 /* We keep around the symbols even if we aren't going to use this
2967 object file, because we may want to reread it. This doesn't
2968 waste too much memory, because it isn't all that common to read
2969 an archive element but not need it. */
2970 if (! info->keep_memory)
2972 if (! aout_link_free_symbols (abfd))
2979 /* Free up the internal symbols read from an a.out file. */
2982 aout_link_free_symbols (abfd)
2985 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
2987 free ((PTR) obj_aout_external_syms (abfd));
2988 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
2990 if (obj_aout_external_strings (abfd) != (char *) NULL)
2992 free ((PTR) obj_aout_external_strings (abfd));
2993 obj_aout_external_strings (abfd) = (char *) NULL;
2998 /* Look through the internal symbols to see if this object file should
2999 be included in the link. We should include this object file if it
3000 defines any symbols which are currently undefined. If this object
3001 file defines a common symbol, then we may adjust the size of the
3002 known symbol but we do not include the object file in the link
3003 (unless there is some other reason to include it). */
3006 aout_link_check_ar_symbols (abfd, info, pneeded)
3008 struct bfd_link_info *info;
3011 register struct external_nlist *p;
3012 struct external_nlist *pend;
3017 /* Look through all the symbols. */
3018 p = obj_aout_external_syms (abfd);
3019 pend = p + obj_aout_external_sym_count (abfd);
3020 strings = obj_aout_external_strings (abfd);
3021 for (; p < pend; p++)
3023 int type = bfd_h_get_8 (abfd, p->e_type);
3025 struct bfd_link_hash_entry *h;
3027 /* Ignore symbols that are not externally visible. */
3028 if ((type & N_EXT) == 0)
3030 if (type == N_WARNING
3036 name = strings + GET_WORD (abfd, p->e_strx);
3037 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3039 /* We are only interested in symbols that are currently
3040 undefined or common. */
3041 if (h == (struct bfd_link_hash_entry *) NULL
3042 || (h->type != bfd_link_hash_undefined
3043 && h->type != bfd_link_hash_common))
3045 if (type == (N_INDR | N_EXT))
3050 if (type == (N_TEXT | N_EXT)
3051 || type == (N_DATA | N_EXT)
3052 || type == (N_BSS | N_EXT)
3053 || type == (N_ABS | N_EXT)
3054 || type == (N_INDR | N_EXT))
3056 /* This object file defines this symbol. We must link it
3057 in. This is true regardless of whether the current
3058 definition of the symbol is undefined or common. If the
3059 current definition is common, we have a case in which we
3060 have already seen an object file including
3062 and this object file from the archive includes
3064 In such a case we must include this object file. */
3065 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3071 if (type == (N_UNDF | N_EXT))
3075 value = GET_WORD (abfd, p->e_value);
3078 /* This symbol is common in the object from the archive
3080 if (h->type == bfd_link_hash_undefined)
3084 symbfd = h->u.undef.abfd;
3085 if (symbfd == (bfd *) NULL)
3087 /* This symbol was created as undefined from
3088 outside BFD. We assume that we should link
3089 in the object file. This is done for the -u
3090 option in the linker. */
3091 if (! (*info->callbacks->add_archive_element) (info,
3098 /* Turn the current link symbol into a common
3099 symbol. It is already on the undefs list. */
3100 h->type = bfd_link_hash_common;
3101 h->u.c.size = value;
3102 h->u.c.section = bfd_make_section_old_way (symbfd,
3107 /* Adjust the size of the common symbol if
3109 if (value > h->u.c.size)
3110 h->u.c.size = value;
3116 /* We do not need this object file. */
3120 /* Add all symbols from an object file to the hash table. */
3123 aout_link_add_symbols (abfd, info)
3125 struct bfd_link_info *info;
3127 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3128 const char *, flagword, asection *,
3129 bfd_vma, const char *, boolean,
3131 struct bfd_link_hash_entry **));
3132 bfd_size_type sym_count;
3135 struct aout_link_hash_entry **sym_hash;
3136 register struct external_nlist *p;
3137 struct external_nlist *pend;
3139 sym_count = obj_aout_external_sym_count (abfd);
3140 strings = obj_aout_external_strings (abfd);
3141 if (info->keep_memory)
3146 /* We keep a list of the linker hash table entries that correspond
3147 to particular symbols. We could just look them up in the hash
3148 table, but keeping the list is more efficient. Perhaps this
3149 should be conditional on info->keep_memory. */
3150 sym_hash = ((struct aout_link_hash_entry **)
3153 * sizeof (struct aout_link_hash_entry *))));
3154 if (sym_hash == NULL && sym_count != 0)
3156 bfd_set_error (bfd_error_no_memory);
3159 obj_aout_sym_hashes (abfd) = sym_hash;
3161 if ((abfd->flags & DYNAMIC) != 0
3162 && aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3164 if (! (*aout_backend_info (abfd)->add_dynamic_symbols) (abfd, info))
3168 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3169 if (add_one_symbol == NULL)
3170 add_one_symbol = _bfd_generic_link_add_one_symbol;
3172 p = obj_aout_external_syms (abfd);
3173 pend = p + sym_count;
3174 for (; p < pend; p++, sym_hash++)
3185 type = bfd_h_get_8 (abfd, p->e_type);
3187 /* Ignore debugging symbols. */
3188 if ((type & N_STAB) != 0)
3191 /* Ignore symbols that are not external. */
3192 if ((type & N_EXT) == 0
3193 && type != N_WARNING
3199 /* If this is an N_INDR symbol we must skip the next entry,
3200 which is the symbol to indirect to (actually, an N_INDR
3201 symbol without N_EXT set is pretty useless). */
3210 /* Ignore N_FN symbols (these appear to have N_EXT set). */
3214 name = strings + GET_WORD (abfd, p->e_strx);
3215 value = GET_WORD (abfd, p->e_value);
3222 case N_UNDF | N_EXT:
3224 section = &bfd_com_section;
3226 section = &bfd_und_section;
3229 section = &bfd_abs_section;
3231 case N_TEXT | N_EXT:
3232 section = obj_textsec (abfd);
3233 value -= bfd_get_section_vma (abfd, section);
3235 case N_DATA | N_EXT:
3236 section = obj_datasec (abfd);
3237 value -= bfd_get_section_vma (abfd, section);
3240 section = obj_bsssec (abfd);
3241 value -= bfd_get_section_vma (abfd, section);
3243 case N_INDR | N_EXT:
3244 /* An indirect symbol. The next symbol is the symbol
3245 which this one really is. */
3246 BFD_ASSERT (p + 1 < pend);
3248 string = strings + GET_WORD (abfd, p->e_strx);
3249 section = &bfd_ind_section;
3250 flags |= BSF_INDIRECT;
3252 case N_COMM | N_EXT:
3253 section = &bfd_com_section;
3255 case N_SETA: case N_SETA | N_EXT:
3256 section = &bfd_abs_section;
3257 flags |= BSF_CONSTRUCTOR;
3259 case N_SETT: case N_SETT | N_EXT:
3260 section = obj_textsec (abfd);
3261 flags |= BSF_CONSTRUCTOR;
3262 value -= bfd_get_section_vma (abfd, section);
3264 case N_SETD: case N_SETD | N_EXT:
3265 section = obj_datasec (abfd);
3266 flags |= BSF_CONSTRUCTOR;
3267 value -= bfd_get_section_vma (abfd, section);
3269 case N_SETB: case N_SETB | N_EXT:
3270 section = obj_bsssec (abfd);
3271 flags |= BSF_CONSTRUCTOR;
3272 value -= bfd_get_section_vma (abfd, section);
3275 /* A warning symbol. The next symbol is the one to warn
3277 BFD_ASSERT (p + 1 < pend);
3280 name = strings + GET_WORD (abfd, p->e_strx);
3281 section = &bfd_und_section;
3282 flags |= BSF_WARNING;
3286 if (! ((*add_one_symbol)
3287 (info, abfd, name, flags, section, value, string, copy, false,
3288 (struct bfd_link_hash_entry **) sym_hash)))
3291 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3298 /* During the final link step we need to pass around a bunch of
3299 information, so we do it in an instance of this structure. */
3301 struct aout_final_link_info
3303 /* General link information. */
3304 struct bfd_link_info *info;
3307 /* Reloc file positions. */
3308 file_ptr treloff, dreloff;
3309 /* File position of symbols. */
3312 struct stringtab_data strtab;
3315 static boolean aout_link_input_bfd
3316 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3317 static boolean aout_link_write_symbols
3318 PARAMS ((struct aout_final_link_info *, bfd *input_bfd, int *symbol_map));
3319 static boolean aout_link_write_other_symbol
3320 PARAMS ((struct aout_link_hash_entry *, PTR));
3321 static boolean aout_link_input_section
3322 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3323 asection *input_section, file_ptr *reloff_ptr,
3324 bfd_size_type rel_size, int *symbol_map));
3325 static boolean aout_link_input_section_std
3326 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3327 asection *input_section, struct reloc_std_external *,
3328 bfd_size_type rel_size, bfd_byte *contents, int *symbol_map));
3329 static boolean aout_link_input_section_ext
3330 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3331 asection *input_section, struct reloc_ext_external *,
3332 bfd_size_type rel_size, bfd_byte *contents, int *symbol_map));
3333 static INLINE asection *aout_reloc_index_to_section
3334 PARAMS ((bfd *, int));
3335 static boolean aout_link_reloc_link_order
3336 PARAMS ((struct aout_final_link_info *, asection *,
3337 struct bfd_link_order *));
3339 /* Do the final link step. This is called on the output BFD. The
3340 INFO structure should point to a list of BFDs linked through the
3341 link_next field which can be used to find each BFD which takes part
3342 in the output. Also, each section in ABFD should point to a list
3343 of bfd_link_order structures which list all the input sections for
3344 the output section. */
3347 NAME(aout,final_link) (abfd, info, callback)
3349 struct bfd_link_info *info;
3350 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3352 struct aout_final_link_info aout_info;
3354 bfd_size_type text_size;
3356 register struct bfd_link_order *p;
3358 boolean have_link_order_relocs;
3360 aout_info.info = info;
3361 aout_info.output_bfd = abfd;
3363 if (! info->relocateable)
3365 exec_hdr (abfd)->a_trsize = 0;
3366 exec_hdr (abfd)->a_drsize = 0;
3370 bfd_size_type trsize, drsize;
3372 /* Count up the relocation sizes. */
3375 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3377 if (bfd_get_flavour (abfd) == bfd_target_aout_flavour)
3379 trsize += exec_hdr (sub)->a_trsize;
3380 drsize += exec_hdr (sub)->a_drsize;
3384 /* FIXME: We need to identify the .text and .data sections
3385 and call get_reloc_upper_bound and canonicalize_reloc to
3386 work out the number of relocs needed, and then multiply
3387 by the reloc size. */
3391 if (obj_textsec (abfd) != (asection *) NULL)
3392 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3394 * obj_reloc_entry_size (abfd));
3395 exec_hdr (abfd)->a_trsize = trsize;
3396 if (obj_datasec (abfd) != (asection *) NULL)
3397 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3399 * obj_reloc_entry_size (abfd));
3400 exec_hdr (abfd)->a_drsize = drsize;
3403 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3405 /* Adjust the section sizes and vmas according to the magic number.
3406 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3407 filepos for each section. */
3408 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3411 /* The relocation and symbol file positions differ among a.out
3412 targets. We are passed a callback routine from the backend
3413 specific code to handle this.
3414 FIXME: At this point we do not know how much space the symbol
3415 table will require. This will not work for any (nonstandard)
3416 a.out target that needs to know the symbol table size before it
3417 can compute the relocation file positions. This may or may not
3418 be the case for the hp300hpux target, for example. */
3419 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3421 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3422 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3423 obj_sym_filepos (abfd) = aout_info.symoff;
3425 /* We keep a count of the symbols as we output them. */
3426 obj_aout_external_sym_count (abfd) = 0;
3428 /* We accumulate the string table as we write out the symbols. */
3429 stringtab_init (&aout_info.strtab);
3431 /* The most time efficient way to do the link would be to read all
3432 the input object files into memory and then sort out the
3433 information into the output file. Unfortunately, that will
3434 probably use too much memory. Another method would be to step
3435 through everything that composes the text section and write it
3436 out, and then everything that composes the data section and write
3437 it out, and then write out the relocs, and then write out the
3438 symbols. Unfortunately, that requires reading stuff from each
3439 input file several times, and we will not be able to keep all the
3440 input files open simultaneously, and reopening them will be slow.
3442 What we do is basically process one input file at a time. We do
3443 everything we need to do with an input file once--copy over the
3444 section contents, handle the relocation information, and write
3445 out the symbols--and then we throw away the information we read
3446 from it. This approach requires a lot of lseeks of the output
3447 file, which is unfortunate but still faster than reopening a lot
3450 We use the output_has_begun field of the input BFDs to see
3451 whether we have already handled it. */
3452 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3453 sub->output_has_begun = false;
3455 have_link_order_relocs = false;
3456 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3458 for (p = o->link_order_head;
3459 p != (struct bfd_link_order *) NULL;
3462 if (p->type == bfd_indirect_link_order
3463 && (bfd_get_flavour (p->u.indirect.section->owner)
3464 == bfd_target_aout_flavour))
3468 input_bfd = p->u.indirect.section->owner;
3469 if (! input_bfd->output_has_begun)
3471 if (! aout_link_input_bfd (&aout_info, input_bfd))
3473 input_bfd->output_has_begun = true;
3476 else if (p->type == bfd_section_reloc_link_order
3477 || p->type == bfd_symbol_reloc_link_order)
3479 /* These are handled below. */
3480 have_link_order_relocs = true;
3484 if (! _bfd_default_link_order (abfd, info, o, p))
3490 /* Write out any symbols that we have not already written out. */
3491 aout_link_hash_traverse (aout_hash_table (info),
3492 aout_link_write_other_symbol,
3495 /* Now handle any relocs we were asked to create by the linker.
3496 These did not come from any input file. We must do these after
3497 we have written out all the symbols, so that we know the symbol
3499 if (have_link_order_relocs)
3501 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3503 for (p = o->link_order_head;
3504 p != (struct bfd_link_order *) NULL;
3507 if (p->type == bfd_section_reloc_link_order
3508 || p->type == bfd_symbol_reloc_link_order)
3510 if (! aout_link_reloc_link_order (&aout_info, o, p))
3517 /* Finish up any dynamic linking we may be doing. */
3518 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3520 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3524 /* Update the header information. */
3525 abfd->symcount = obj_aout_external_sym_count (abfd);
3526 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3527 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3528 obj_textsec (abfd)->reloc_count =
3529 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3530 obj_datasec (abfd)->reloc_count =
3531 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3533 /* Write out the string table. */
3534 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
3536 return emit_strtab (abfd, &aout_info.strtab);
3539 /* Link an a.out input BFD into the output file. */
3542 aout_link_input_bfd (finfo, input_bfd)
3543 struct aout_final_link_info *finfo;
3546 bfd_size_type sym_count;
3547 int *symbol_map = NULL;
3549 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3551 /* If this is a dynamic object, it may need special handling. */
3552 if ((input_bfd->flags & DYNAMIC) != 0
3553 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3555 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3556 (finfo->info, input_bfd));
3559 /* Get the symbols. We probably have them already, unless
3560 finfo->info->keep_memory is false. */
3561 if (! aout_get_external_symbols (input_bfd))
3564 sym_count = obj_aout_external_sym_count (input_bfd);
3565 symbol_map = (int *) malloc ((size_t) sym_count * sizeof (int));
3566 if (symbol_map == NULL && sym_count != 0)
3568 bfd_set_error (bfd_error_no_memory);
3572 /* Write out the symbols and get a map of the new indices. */
3573 if (! aout_link_write_symbols (finfo, input_bfd, symbol_map))
3576 /* Relocate and write out the sections. */
3577 if (! aout_link_input_section (finfo, input_bfd,
3578 obj_textsec (input_bfd),
3580 exec_hdr (input_bfd)->a_trsize,
3582 || ! aout_link_input_section (finfo, input_bfd,
3583 obj_datasec (input_bfd),
3585 exec_hdr (input_bfd)->a_drsize,
3589 /* If we are not keeping memory, we don't need the symbols any
3590 longer. We still need them if we are keeping memory, because the
3591 strings in the hash table point into them. */
3592 if (! finfo->info->keep_memory)
3594 if (! aout_link_free_symbols (input_bfd))
3598 if (symbol_map != NULL)
3602 if (symbol_map != NULL)
3607 /* Adjust and write out the symbols for an a.out file. Set the new
3608 symbol indices into a symbol_map. */
3611 aout_link_write_symbols (finfo, input_bfd, symbol_map)
3612 struct aout_final_link_info *finfo;
3617 bfd_size_type sym_count;
3619 enum bfd_link_strip strip;
3620 enum bfd_link_discard discard;
3621 struct external_nlist *output_syms = NULL;
3622 struct external_nlist *outsym;
3623 register struct external_nlist *sym;
3624 struct external_nlist *sym_end;
3625 struct aout_link_hash_entry **sym_hash;
3627 boolean skip_indirect;
3629 output_bfd = finfo->output_bfd;
3630 sym_count = obj_aout_external_sym_count (input_bfd);
3631 strings = obj_aout_external_strings (input_bfd);
3632 strip = finfo->info->strip;
3633 discard = finfo->info->discard;
3634 output_syms = ((struct external_nlist *)
3635 malloc ((size_t) (sym_count + 1) * EXTERNAL_NLIST_SIZE));
3636 if (output_syms == NULL)
3638 bfd_set_error (bfd_error_no_memory);
3641 outsym = output_syms;
3643 /* First write out a symbol for this object file, unless we are
3644 discarding such symbols. */
3645 if (strip != strip_all
3646 && (strip != strip_some
3647 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
3648 false, false) != NULL)
3649 && discard != discard_all)
3651 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
3652 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
3653 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
3654 PUT_WORD (output_bfd,
3655 add_to_stringtab (output_bfd, input_bfd->filename,
3658 PUT_WORD (output_bfd,
3659 (bfd_get_section_vma (output_bfd,
3660 obj_textsec (input_bfd)->output_section)
3661 + obj_textsec (input_bfd)->output_offset),
3663 ++obj_aout_external_sym_count (output_bfd);
3668 skip_indirect = false;
3669 sym = obj_aout_external_syms (input_bfd);
3670 sym_end = sym + sym_count;
3671 sym_hash = obj_aout_sym_hashes (input_bfd);
3672 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
3676 struct aout_link_hash_entry *h;
3683 type = bfd_h_get_8 (input_bfd, sym->e_type);
3684 name = strings + GET_WORD (input_bfd, sym->e_strx);
3690 /* Pass this symbol through. It is the target of an
3691 indirect or warning symbol. */
3692 val = GET_WORD (input_bfd, sym->e_value);
3695 else if (skip_indirect)
3697 /* Skip this symbol, which is the target of an indirect
3698 symbol that we have changed to no longer be an indirect
3700 skip_indirect = false;
3705 struct aout_link_hash_entry *hresolve;
3707 /* We have saved the hash table entry for this symbol, if
3708 there is one. Note that we could just look it up again
3709 in the hash table, provided we first check that it is an
3713 /* If this is an indirect or warning symbol, then change
3714 hresolve to the base symbol. We also change *sym_hash so
3715 that the relocation routines relocate against the real
3718 if (h != (struct aout_link_hash_entry *) NULL
3719 && (h->root.type == bfd_link_hash_indirect
3720 || h->root.type == bfd_link_hash_warning))
3722 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
3723 while (hresolve->root.type == bfd_link_hash_indirect)
3724 hresolve = ((struct aout_link_hash_entry *)
3725 hresolve->root.u.i.link);
3726 *sym_hash = hresolve;
3729 /* If the symbol has already been written out, skip it. */
3730 if (h != (struct aout_link_hash_entry *) NULL
3731 && h->root.type != bfd_link_hash_warning
3734 if ((type & N_TYPE) == N_INDR)
3735 skip_indirect = true;
3736 *symbol_map = h->indx;
3740 /* See if we are stripping this symbol. */
3746 case strip_debugger:
3747 if ((type & N_STAB) != 0)
3751 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
3761 if (h != (struct aout_link_hash_entry *) NULL)
3766 /* Get the value of the symbol. */
3767 if ((type & N_TYPE) == N_TEXT)
3768 symsec = obj_textsec (input_bfd);
3769 else if ((type & N_TYPE) == N_DATA)
3770 symsec = obj_datasec (input_bfd);
3771 else if ((type & N_TYPE) == N_BSS)
3772 symsec = obj_bsssec (input_bfd);
3773 else if ((type & N_TYPE) == N_ABS)
3774 symsec = &bfd_abs_section;
3775 else if (((type & N_TYPE) == N_INDR
3776 && (hresolve == (struct aout_link_hash_entry *) NULL
3777 || (hresolve->root.type != bfd_link_hash_defined
3778 && hresolve->root.type != bfd_link_hash_common)))
3779 || type == N_WARNING)
3781 /* Pass the next symbol through unchanged. The
3782 condition above for indirect symbols is so that if
3783 the indirect symbol was defined, we output it with
3784 the correct definition so the debugger will
3787 val = GET_WORD (input_bfd, sym->e_value);
3790 else if ((type & N_STAB) != 0)
3792 val = GET_WORD (input_bfd, sym->e_value);
3797 /* If we get here with an indirect symbol, it means that
3798 we are outputting it with a real definition. In such
3799 a case we do not want to output the next symbol,
3800 which is the target of the indirection. */
3801 if ((type & N_TYPE) == N_INDR)
3802 skip_indirect = true;
3804 /* We need to get the value from the hash table. We use
3805 hresolve so that if we have defined an indirect
3806 symbol we output the final definition. */
3807 if (h == (struct aout_link_hash_entry *) NULL)
3809 else if (hresolve->root.type == bfd_link_hash_defined)
3811 asection *input_section;
3812 asection *output_section;
3814 /* This case means a common symbol which was turned
3815 into a defined symbol. */
3816 input_section = hresolve->root.u.def.section;
3817 output_section = input_section->output_section;
3818 BFD_ASSERT (output_section == &bfd_abs_section
3819 || output_section->owner == output_bfd);
3820 val = (hresolve->root.u.def.value
3821 + bfd_get_section_vma (output_bfd, output_section)
3822 + input_section->output_offset);
3824 /* Get the correct type based on the section. If
3825 this is a constructed set, force it to be
3826 globally visible. */
3835 if (output_section == obj_textsec (output_bfd))
3837 else if (output_section == obj_datasec (output_bfd))
3839 else if (output_section == obj_bsssec (output_bfd))
3844 else if (hresolve->root.type == bfd_link_hash_common)
3845 val = hresolve->root.u.c.size;
3851 if (symsec != (asection *) NULL)
3852 val = (symsec->output_section->vma
3853 + symsec->output_offset
3854 + (GET_WORD (input_bfd, sym->e_value)
3857 /* If this is a global symbol set the written flag, and if
3858 it is a local symbol see if we should discard it. */
3859 if (h != (struct aout_link_hash_entry *) NULL)
3862 h->indx = obj_aout_external_sym_count (output_bfd);
3871 if (*name == *finfo->info->lprefix
3872 && (finfo->info->lprefix_len == 1
3873 || strncmp (name, finfo->info->lprefix,
3874 finfo->info->lprefix_len) == 0))
3889 /* Copy this symbol into the list of symbols we are going to
3891 bfd_h_put_8 (output_bfd, type, outsym->e_type);
3892 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
3894 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
3896 if (! finfo->info->keep_memory)
3898 /* name points into a string table which we are going to
3899 free. If there is a hash table entry, use that string.
3900 Otherwise, copy name into memory. */
3901 if (h != (struct aout_link_hash_entry *) NULL)
3902 name = (*sym_hash)->root.root.string;
3907 n = bfd_alloc (output_bfd, strlen (name) + 1);
3912 PUT_WORD (output_bfd,
3913 add_to_stringtab (output_bfd, name, &finfo->strtab),
3915 PUT_WORD (output_bfd, val, outsym->e_value);
3916 *symbol_map = obj_aout_external_sym_count (output_bfd);
3917 ++obj_aout_external_sym_count (output_bfd);
3921 /* Write out the output symbols we have just constructed. */
3922 if (outsym > output_syms)
3924 bfd_size_type outsym_count;
3926 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
3928 outsym_count = outsym - output_syms;
3929 if (bfd_write ((PTR) output_syms, (bfd_size_type) EXTERNAL_NLIST_SIZE,
3930 (bfd_size_type) outsym_count, output_bfd)
3931 != outsym_count * EXTERNAL_NLIST_SIZE)
3933 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
3936 if (output_syms != NULL)
3940 if (output_syms != NULL)
3945 /* Write out a symbol that was not associated with an a.out input
3949 aout_link_write_other_symbol (h, data)
3950 struct aout_link_hash_entry *h;
3953 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
3957 struct external_nlist outsym;
3959 output_bfd = finfo->output_bfd;
3961 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
3963 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
3964 (output_bfd, finfo->info, h)))
3966 /* FIXME: No way to handle errors. */
3976 if (finfo->info->strip == strip_all
3977 || (finfo->info->strip == strip_some
3978 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
3979 false, false) == NULL))
3982 switch (h->root.type)
3985 case bfd_link_hash_new:
3987 /* Avoid variable not initialized warnings. */
3989 case bfd_link_hash_undefined:
3990 type = N_UNDF | N_EXT;
3993 case bfd_link_hash_defined:
3997 sec = h->root.u.def.section;
3998 BFD_ASSERT (sec == &bfd_abs_section
3999 || sec->owner == output_bfd);
4000 if (sec == obj_textsec (output_bfd))
4001 type = N_TEXT | N_EXT;
4002 else if (sec == obj_datasec (output_bfd))
4003 type = N_DATA | N_EXT;
4004 else if (sec == obj_bsssec (output_bfd))
4005 type = N_BSS | N_EXT;
4007 type = N_ABS | N_EXT;
4008 val = (h->root.u.def.value
4009 + sec->output_section->vma
4010 + sec->output_offset);
4013 case bfd_link_hash_common:
4014 type = N_UNDF | N_EXT;
4015 val = h->root.u.c.size;
4017 case bfd_link_hash_indirect:
4018 case bfd_link_hash_warning:
4019 /* FIXME: Ignore these for now. The circumstances under which
4020 they should be written out are not clear to me. */
4024 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4025 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4026 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4027 PUT_WORD (output_bfd,
4028 add_to_stringtab (output_bfd, h->root.root.string, &finfo->strtab),
4030 PUT_WORD (output_bfd, val, outsym.e_value);
4032 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4033 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4034 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4036 /* FIXME: No way to handle errors. */
4040 finfo->symoff += EXTERNAL_NLIST_SIZE;
4041 h->indx = obj_aout_external_sym_count (output_bfd);
4042 ++obj_aout_external_sym_count (output_bfd);
4047 /* Link an a.out section into the output file. */
4050 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4051 rel_size, symbol_map)
4052 struct aout_final_link_info *finfo;
4054 asection *input_section;
4055 file_ptr *reloff_ptr;
4056 bfd_size_type rel_size;
4059 bfd_size_type input_size;
4060 bfd_byte *contents = NULL;
4062 PTR free_relocs = NULL;
4064 /* Get the section contents. */
4065 input_size = bfd_section_size (input_bfd, input_section);
4066 contents = (bfd_byte *) malloc (input_size);
4067 if (contents == NULL && input_size != 0)
4069 bfd_set_error (bfd_error_no_memory);
4072 if (! bfd_get_section_contents (input_bfd, input_section, (PTR) contents,
4073 (file_ptr) 0, input_size))
4076 /* Read in the relocs if we haven't already done it. */
4077 if (aout_section_data (input_section) != NULL
4078 && aout_section_data (input_section)->relocs != NULL)
4079 relocs = aout_section_data (input_section)->relocs;
4082 relocs = free_relocs = (PTR) malloc (rel_size);
4083 if (relocs == NULL && rel_size != 0)
4085 bfd_set_error (bfd_error_no_memory);
4088 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4089 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4093 /* Relocate the section contents. */
4094 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4096 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4097 (struct reloc_std_external *) relocs,
4098 rel_size, contents, symbol_map))
4103 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4104 (struct reloc_ext_external *) relocs,
4105 rel_size, contents, symbol_map))
4109 /* Write out the section contents. */
4110 if (! bfd_set_section_contents (finfo->output_bfd,
4111 input_section->output_section,
4113 input_section->output_offset,
4117 /* If we are producing relocateable output, the relocs were
4118 modified, and we now write them out. */
4119 if (finfo->info->relocateable)
4121 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4123 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4126 *reloff_ptr += rel_size;
4128 /* Assert that the relocs have not run into the symbols, and
4129 that if these are the text relocs they have not run into the
4131 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4132 && (reloff_ptr != &finfo->treloff
4134 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4137 if (free_relocs != NULL)
4139 if (contents != NULL)
4143 if (free_relocs != NULL)
4145 if (contents != NULL)
4150 /* Get the section corresponding to a reloc index. */
4152 static INLINE asection *
4153 aout_reloc_index_to_section (abfd, indx)
4157 switch (indx & N_TYPE)
4160 return obj_textsec (abfd);
4162 return obj_datasec (abfd);
4164 return obj_bsssec (abfd);
4167 return &bfd_abs_section;
4173 /* Relocate an a.out section using standard a.out relocs. */
4176 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4177 rel_size, contents, symbol_map)
4178 struct aout_final_link_info *finfo;
4180 asection *input_section;
4181 struct reloc_std_external *relocs;
4182 bfd_size_type rel_size;
4186 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4188 struct aout_link_hash_entry *,
4191 boolean relocateable;
4192 struct external_nlist *syms;
4194 struct aout_link_hash_entry **sym_hashes;
4195 bfd_size_type reloc_count;
4196 register struct reloc_std_external *rel;
4197 struct reloc_std_external *rel_end;
4199 output_bfd = finfo->output_bfd;
4200 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4202 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4203 BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p
4204 == output_bfd->xvec->header_byteorder_big_p);
4206 relocateable = finfo->info->relocateable;
4207 syms = obj_aout_external_syms (input_bfd);
4208 strings = obj_aout_external_strings (input_bfd);
4209 sym_hashes = obj_aout_sym_hashes (input_bfd);
4211 reloc_count = rel_size / RELOC_STD_SIZE;
4213 rel_end = rel + reloc_count;
4214 for (; rel < rel_end; rel++)
4226 bfd_reloc_status_type r;
4228 r_addr = GET_SWORD (input_bfd, rel->r_address);
4230 if (input_bfd->xvec->header_byteorder_big_p)
4232 r_index = ((rel->r_index[0] << 16)
4233 | (rel->r_index[1] << 8)
4235 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4236 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4237 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4238 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4239 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4240 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4241 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4245 r_index = ((rel->r_index[2] << 16)
4246 | (rel->r_index[1] << 8)
4248 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4249 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4250 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
4251 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
4252 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
4253 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4254 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4257 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
4258 + 16 * r_jmptable + 32 * r_relative;
4259 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4263 /* We are generating a relocateable output file, and must
4264 modify the reloc accordingly. */
4267 struct aout_link_hash_entry *h;
4269 /* If we know the symbol this relocation is against,
4270 convert it into a relocation against a section. This
4271 is what the native linker does. */
4272 h = sym_hashes[r_index];
4273 if (h != (struct aout_link_hash_entry *) NULL
4274 && h->root.type == bfd_link_hash_defined)
4276 asection *output_section;
4278 /* Change the r_extern value. */
4279 if (output_bfd->xvec->header_byteorder_big_p)
4280 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4282 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4284 /* Compute a new r_index. */
4285 output_section = h->root.u.def.section->output_section;
4286 if (output_section == obj_textsec (output_bfd))
4288 else if (output_section == obj_datasec (output_bfd))
4290 else if (output_section == obj_bsssec (output_bfd))
4295 /* Add the symbol value and the section VMA to the
4296 addend stored in the contents. */
4297 relocation = (h->root.u.def.value
4298 + output_section->vma
4299 + h->root.u.def.section->output_offset);
4303 /* We must change r_index according to the symbol
4305 r_index = symbol_map[r_index];
4311 name = strings + GET_WORD (input_bfd,
4312 syms[r_index].e_strx);
4313 if (! ((*finfo->info->callbacks->unattached_reloc)
4314 (finfo->info, name, input_bfd, input_section,
4323 /* Write out the new r_index value. */
4324 if (output_bfd->xvec->header_byteorder_big_p)
4326 rel->r_index[0] = r_index >> 16;
4327 rel->r_index[1] = r_index >> 8;
4328 rel->r_index[2] = r_index;
4332 rel->r_index[2] = r_index >> 16;
4333 rel->r_index[1] = r_index >> 8;
4334 rel->r_index[0] = r_index;
4341 /* This is a relocation against a section. We must
4342 adjust by the amount that the section moved. */
4343 section = aout_reloc_index_to_section (input_bfd, r_index);
4344 relocation = (section->output_section->vma
4345 + section->output_offset
4349 /* Change the address of the relocation. */
4350 PUT_WORD (output_bfd,
4351 r_addr + input_section->output_offset,
4354 /* Adjust a PC relative relocation by removing the reference
4355 to the original address in the section and including the
4356 reference to the new address. */
4358 relocation -= (input_section->output_section->vma
4359 + input_section->output_offset
4360 - input_section->vma);
4362 if (relocation == 0)
4365 r = _bfd_relocate_contents (howto_table_std + howto_idx,
4366 input_bfd, relocation,
4371 /* We are generating an executable, and must do a full
4375 struct aout_link_hash_entry *h;
4377 h = sym_hashes[r_index];
4379 if (check_dynamic_reloc != NULL)
4383 if (! ((*check_dynamic_reloc)
4384 (finfo->info, input_bfd, input_section, h,
4391 if (h != (struct aout_link_hash_entry *) NULL
4392 && h->root.type == bfd_link_hash_defined)
4394 relocation = (h->root.u.def.value
4395 + h->root.u.def.section->output_section->vma
4396 + h->root.u.def.section->output_offset);
4402 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4403 if (! ((*finfo->info->callbacks->undefined_symbol)
4404 (finfo->info, name, input_bfd, input_section,
4414 section = aout_reloc_index_to_section (input_bfd, r_index);
4415 relocation = (section->output_section->vma
4416 + section->output_offset
4419 relocation += input_section->vma;
4422 r = _bfd_final_link_relocate (howto_table_std + howto_idx,
4423 input_bfd, input_section,
4424 contents, r_addr, relocation,
4428 if (r != bfd_reloc_ok)
4433 case bfd_reloc_outofrange:
4435 case bfd_reloc_overflow:
4440 name = strings + GET_WORD (input_bfd,
4441 syms[r_index].e_strx);
4446 s = aout_reloc_index_to_section (input_bfd, r_index);
4447 name = bfd_section_name (input_bfd, s);
4449 if (! ((*finfo->info->callbacks->reloc_overflow)
4450 (finfo->info, name, howto_table_std[howto_idx].name,
4451 (bfd_vma) 0, input_bfd, input_section, r_addr)))
4462 /* Relocate an a.out section using extended a.out relocs. */
4465 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
4466 rel_size, contents, symbol_map)
4467 struct aout_final_link_info *finfo;
4469 asection *input_section;
4470 struct reloc_ext_external *relocs;
4471 bfd_size_type rel_size;
4475 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4477 struct aout_link_hash_entry *,
4480 boolean relocateable;
4481 struct external_nlist *syms;
4483 struct aout_link_hash_entry **sym_hashes;
4484 bfd_size_type reloc_count;
4485 register struct reloc_ext_external *rel;
4486 struct reloc_ext_external *rel_end;
4488 output_bfd = finfo->output_bfd;
4489 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4491 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4492 BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p
4493 == output_bfd->xvec->header_byteorder_big_p);
4495 relocateable = finfo->info->relocateable;
4496 syms = obj_aout_external_syms (input_bfd);
4497 strings = obj_aout_external_strings (input_bfd);
4498 sym_hashes = obj_aout_sym_hashes (input_bfd);
4500 reloc_count = rel_size / RELOC_EXT_SIZE;
4502 rel_end = rel + reloc_count;
4503 for (; rel < rel_end; rel++)
4512 r_addr = GET_SWORD (input_bfd, rel->r_address);
4514 if (input_bfd->xvec->header_byteorder_big_p)
4516 r_index = ((rel->r_index[0] << 16)
4517 | (rel->r_index[1] << 8)
4519 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4520 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4521 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4525 r_index = ((rel->r_index[2] << 16)
4526 | (rel->r_index[1] << 8)
4528 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4529 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4530 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4533 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4535 BFD_ASSERT (r_type >= 0
4536 && r_type < TABLE_SIZE (howto_table_ext));
4540 /* We are generating a relocateable output file, and must
4541 modify the reloc accordingly. */
4544 struct aout_link_hash_entry *h;
4546 /* If we know the symbol this relocation is against,
4547 convert it into a relocation against a section. This
4548 is what the native linker does. */
4549 h = sym_hashes[r_index];
4550 if (h != (struct aout_link_hash_entry *) NULL
4551 && h->root.type == bfd_link_hash_defined)
4553 asection *output_section;
4555 /* Change the r_extern value. */
4556 if (output_bfd->xvec->header_byteorder_big_p)
4557 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4559 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4561 /* Compute a new r_index. */
4562 output_section = h->root.u.def.section->output_section;
4563 if (output_section == obj_textsec (output_bfd))
4565 else if (output_section == obj_datasec (output_bfd))
4567 else if (output_section == obj_bsssec (output_bfd))
4572 /* Add the symbol value and the section VMA to the
4574 relocation = (h->root.u.def.value
4575 + output_section->vma
4576 + h->root.u.def.section->output_offset);
4578 /* Now RELOCATION is the VMA of the final
4579 destination. If this is a PC relative reloc,
4580 then ADDEND is the negative of the source VMA.
4581 We want to set ADDEND to the difference between
4582 the destination VMA and the source VMA, which
4583 means we must adjust RELOCATION by the change in
4584 the source VMA. This is done below. */
4588 /* We must change r_index according to the symbol
4590 r_index = symbol_map[r_index];
4597 + GET_WORD (input_bfd, syms[r_index].e_strx));
4598 if (! ((*finfo->info->callbacks->unattached_reloc)
4599 (finfo->info, name, input_bfd, input_section,
4607 /* If this is a PC relative reloc, then the addend
4608 is the negative of the source VMA. We must
4609 adjust it by the change in the source VMA. This
4613 /* Write out the new r_index value. */
4614 if (output_bfd->xvec->header_byteorder_big_p)
4616 rel->r_index[0] = r_index >> 16;
4617 rel->r_index[1] = r_index >> 8;
4618 rel->r_index[2] = r_index;
4622 rel->r_index[2] = r_index >> 16;
4623 rel->r_index[1] = r_index >> 8;
4624 rel->r_index[0] = r_index;
4631 /* This is a relocation against a section. We must
4632 adjust by the amount that the section moved. */
4633 section = aout_reloc_index_to_section (input_bfd, r_index);
4634 relocation = (section->output_section->vma
4635 + section->output_offset
4638 /* If this is a PC relative reloc, then the addend is
4639 the difference in VMA between the destination and the
4640 source. We have just adjusted for the change in VMA
4641 of the destination, so we must also adjust by the
4642 change in VMA of the source. This is done below. */
4645 /* As described above, we must always adjust a PC relative
4646 reloc by the change in VMA of the source. */
4647 if (howto_table_ext[r_type].pc_relative)
4648 relocation -= (input_section->output_section->vma
4649 + input_section->output_offset
4650 - input_section->vma);
4652 /* Change the addend if necessary. */
4653 if (relocation != 0)
4654 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4656 /* Change the address of the relocation. */
4657 PUT_WORD (output_bfd,
4658 r_addr + input_section->output_offset,
4663 bfd_reloc_status_type r;
4665 /* We are generating an executable, and must do a full
4669 struct aout_link_hash_entry *h;
4671 h = sym_hashes[r_index];
4673 if (check_dynamic_reloc != NULL)
4677 if (! ((*check_dynamic_reloc)
4678 (finfo->info, input_bfd, input_section, h,
4685 if (h != (struct aout_link_hash_entry *) NULL
4686 && h->root.type == bfd_link_hash_defined)
4688 relocation = (h->root.u.def.value
4689 + h->root.u.def.section->output_section->vma
4690 + h->root.u.def.section->output_offset);
4696 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4697 if (! ((*finfo->info->callbacks->undefined_symbol)
4698 (finfo->info, name, input_bfd, input_section,
4708 section = aout_reloc_index_to_section (input_bfd, r_index);
4710 /* If this is a PC relative reloc, then R_ADDEND is the
4711 difference between the two vmas, or
4712 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4714 old_dest_sec == section->vma
4716 old_src_sec == input_section->vma
4718 old_src_off == r_addr
4720 _bfd_final_link_relocate expects RELOCATION +
4721 R_ADDEND to be the VMA of the destination minus
4722 r_addr (the minus r_addr is because this relocation
4723 is not pcrel_offset, which is a bit confusing and
4724 should, perhaps, be changed), or
4727 new_dest_sec == output_section->vma + output_offset
4728 We arrange for this to happen by setting RELOCATION to
4729 new_dest_sec + old_src_sec - old_dest_sec
4731 If this is not a PC relative reloc, then R_ADDEND is
4732 simply the VMA of the destination, so we set
4733 RELOCATION to the change in the destination VMA, or
4734 new_dest_sec - old_dest_sec
4736 relocation = (section->output_section->vma
4737 + section->output_offset
4739 if (howto_table_ext[r_type].pc_relative)
4740 relocation += input_section->vma;
4743 r = _bfd_final_link_relocate (howto_table_ext + r_type,
4744 input_bfd, input_section,
4745 contents, r_addr, relocation,
4747 if (r != bfd_reloc_ok)
4752 case bfd_reloc_outofrange:
4754 case bfd_reloc_overflow:
4759 name = strings + GET_WORD (input_bfd,
4760 syms[r_index].e_strx);
4765 s = aout_reloc_index_to_section (input_bfd, r_index);
4766 name = bfd_section_name (input_bfd, s);
4768 if (! ((*finfo->info->callbacks->reloc_overflow)
4769 (finfo->info, name, howto_table_ext[r_type].name,
4770 r_addend, input_bfd, input_section, r_addr)))
4782 /* Handle a link order which is supposed to generate a reloc. */
4785 aout_link_reloc_link_order (finfo, o, p)
4786 struct aout_final_link_info *finfo;
4788 struct bfd_link_order *p;
4790 struct bfd_link_order_reloc *pr;
4793 const reloc_howto_type *howto;
4794 file_ptr *reloff_ptr;
4795 struct reloc_std_external srel;
4796 struct reloc_ext_external erel;
4801 if (p->type == bfd_section_reloc_link_order)
4804 if (pr->u.section == &bfd_abs_section)
4805 r_index = N_ABS | N_EXT;
4808 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
4809 r_index = pr->u.section->target_index;
4814 struct aout_link_hash_entry *h;
4816 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
4818 h = aout_link_hash_lookup (aout_hash_table (finfo->info),
4819 pr->u.name, false, false, true);
4820 if (h != (struct aout_link_hash_entry *) NULL
4825 if (! ((*finfo->info->callbacks->unattached_reloc)
4826 (finfo->info, pr->u.name, (bfd *) NULL,
4827 (asection *) NULL, (bfd_vma) 0)))
4833 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
4834 if (howto == (const reloc_howto_type *) NULL)
4836 bfd_set_error (bfd_error_bad_value);
4840 if (o == obj_textsec (finfo->output_bfd))
4841 reloff_ptr = &finfo->treloff;
4842 else if (o == obj_datasec (finfo->output_bfd))
4843 reloff_ptr = &finfo->dreloff;
4847 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
4855 r_pcrel = howto->pc_relative;
4856 r_baserel = (howto->type & 8) != 0;
4857 r_jmptable = (howto->type & 16) != 0;
4858 r_relative = (howto->type & 32) != 0;
4859 r_length = howto->size;
4861 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
4862 if (finfo->output_bfd->xvec->header_byteorder_big_p)
4864 srel.r_index[0] = r_index >> 16;
4865 srel.r_index[1] = r_index >> 8;
4866 srel.r_index[2] = r_index;
4868 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
4869 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
4870 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
4871 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
4872 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
4873 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
4877 srel.r_index[2] = r_index >> 16;
4878 srel.r_index[1] = r_index >> 8;
4879 srel.r_index[0] = r_index;
4881 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
4882 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
4883 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
4884 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
4885 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
4886 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
4889 rel_ptr = (PTR) &srel;
4891 /* We have to write the addend into the object file, since
4892 standard a.out relocs are in place. It would be more
4893 reliable if we had the current contents of the file here,
4894 rather than assuming zeroes, but we can't read the file since
4895 it was opened using bfd_openw. */
4896 if (pr->addend != 0)
4899 bfd_reloc_status_type r;
4903 size = bfd_get_reloc_size (howto);
4904 buf = (bfd_byte *) bfd_zmalloc (size);
4905 if (buf == (bfd_byte *) NULL)
4907 bfd_set_error (bfd_error_no_memory);
4910 r = _bfd_relocate_contents (howto, finfo->output_bfd,
4917 case bfd_reloc_outofrange:
4919 case bfd_reloc_overflow:
4920 if (! ((*finfo->info->callbacks->reloc_overflow)
4922 (p->type == bfd_section_reloc_link_order
4923 ? bfd_section_name (finfo->output_bfd,
4926 howto->name, pr->addend, (bfd *) NULL,
4927 (asection *) NULL, (bfd_vma) 0)))
4934 ok = bfd_set_section_contents (finfo->output_bfd, o,
4936 (file_ptr) p->offset,
4945 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
4947 if (finfo->output_bfd->xvec->header_byteorder_big_p)
4949 erel.r_index[0] = r_index >> 16;
4950 erel.r_index[1] = r_index >> 8;
4951 erel.r_index[2] = r_index;
4953 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
4954 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
4958 erel.r_index[2] = r_index >> 16;
4959 erel.r_index[1] = r_index >> 8;
4960 erel.r_index[0] = r_index;
4962 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
4963 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
4966 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
4968 rel_ptr = (PTR) &erel;
4971 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
4972 || (bfd_write (rel_ptr, (bfd_size_type) 1,
4973 obj_reloc_entry_size (finfo->output_bfd),
4975 != obj_reloc_entry_size (finfo->output_bfd)))
4978 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
4980 /* Assert that the relocs have not run into the symbols, and that n
4981 the text relocs have not run into the data relocs. */
4982 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4983 && (reloff_ptr != &finfo->treloff
4985 <= obj_datasec (finfo->output_bfd)->rel_filepos)));