1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
3 Free Software Foundation, Inc.
4 Written by Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sunos_big_vec
72 requires all the names from @file{aout32.c}, and produces the jump vector
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
86 When porting it to run on a new system, you must supply:
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected.
112 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
113 Doesn't matter what the setting of WP_TEXT is on output, but it'll
115 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
116 * Any BFD with both flags clear is OMAGIC.
117 (Just want to make these explicit, so the conditions tested in this
118 file make sense if you're more familiar with a.out than with BFD.) */
120 #define KEEPIT udata.i
129 #include "aout/aout64.h"
130 #include "aout/stab_gnu.h"
133 static boolean aout_get_external_symbols PARAMS ((bfd *));
134 static boolean translate_from_native_sym_flags
135 PARAMS ((bfd *, aout_symbol_type *));
136 static boolean translate_to_native_sym_flags
137 PARAMS ((bfd *, asymbol *, struct external_nlist *));
138 static void adjust_o_magic PARAMS ((bfd *, struct internal_exec *));
139 static void adjust_z_magic PARAMS ((bfd *, struct internal_exec *));
140 static void adjust_n_magic PARAMS ((bfd *, struct internal_exec *));
147 The file @file{aoutx.h} provides for both the @emph{standard}
148 and @emph{extended} forms of a.out relocation records.
150 The standard records contain only an
151 address, a symbol index, and a type field. The extended records
152 (used on 29ks and sparcs) also have a full integer for an
156 #ifndef CTOR_TABLE_RELOC_HOWTO
157 #define CTOR_TABLE_RELOC_IDX 2
158 #define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \
159 ? howto_table_ext : howto_table_std) \
160 + CTOR_TABLE_RELOC_IDX)
163 #ifndef MY_swap_std_reloc_in
164 #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
167 #ifndef MY_swap_ext_reloc_in
168 #define MY_swap_ext_reloc_in NAME(aout,swap_ext_reloc_in)
171 #ifndef MY_swap_std_reloc_out
172 #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
175 #ifndef MY_swap_ext_reloc_out
176 #define MY_swap_ext_reloc_out NAME(aout,swap_ext_reloc_out)
179 #ifndef MY_final_link_relocate
180 #define MY_final_link_relocate _bfd_final_link_relocate
183 #ifndef MY_relocate_contents
184 #define MY_relocate_contents _bfd_relocate_contents
187 #define howto_table_ext NAME(aout,ext_howto_table)
188 #define howto_table_std NAME(aout,std_howto_table)
190 reloc_howto_type howto_table_ext[] =
192 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
193 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false),
194 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false),
195 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false),
196 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false),
197 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false),
198 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false),
199 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false),
200 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false),
201 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false),
202 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false),
203 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false),
204 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false),
205 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false),
206 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false),
207 HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false),
208 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_signed,0,"BASE13", false, 0,0x00001fff, false),
209 HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false),
210 HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true),
211 HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true),
212 HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false),
213 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false),
214 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false),
215 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false),
216 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
217 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true),
218 HOWTO(0, 0, 0, 0, false, 0, complain_overflow_dont, 0, "R_SPARC_NONE", false,0,0x00000000,true),
219 #define RELOC_SPARC_REV32 RELOC_WDISP19
220 HOWTO(RELOC_SPARC_REV32, 0, 2, 32, false, 0, complain_overflow_dont,0,"R_SPARC_REV32", false, 0,0xffffffff, false),
223 /* Convert standard reloc records to "arelent" format (incl byte swap). */
225 reloc_howto_type howto_table_std[] = {
226 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
227 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false),
228 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false),
229 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false),
230 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false),
231 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
232 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
233 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
234 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
235 HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false),
236 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false),
237 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false),
243 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false),
259 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
267 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false),
270 #define TABLE_SIZE(TABLE) (sizeof (TABLE)/sizeof (TABLE[0]))
273 NAME(aout,reloc_type_lookup) (abfd,code)
275 bfd_reloc_code_real_type code;
277 #define EXT(i,j) case i: return &howto_table_ext[j]
278 #define STD(i,j) case i: return &howto_table_std[j]
279 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
280 if (code == BFD_RELOC_CTOR)
281 switch (bfd_get_arch_info (abfd)->bits_per_address)
293 EXT (BFD_RELOC_8, 0);
294 EXT (BFD_RELOC_16, 1);
295 EXT (BFD_RELOC_32, 2);
296 EXT (BFD_RELOC_HI22, 8);
297 EXT (BFD_RELOC_LO10, 11);
298 EXT (BFD_RELOC_32_PCREL_S2, 6);
299 EXT (BFD_RELOC_SPARC_WDISP22, 7);
300 EXT (BFD_RELOC_SPARC13, 10);
301 EXT (BFD_RELOC_SPARC_GOT10, 14);
302 EXT (BFD_RELOC_SPARC_BASE13, 15);
303 EXT (BFD_RELOC_SPARC_GOT13, 15);
304 EXT (BFD_RELOC_SPARC_GOT22, 16);
305 EXT (BFD_RELOC_SPARC_PC10, 17);
306 EXT (BFD_RELOC_SPARC_PC22, 18);
307 EXT (BFD_RELOC_SPARC_WPLT30, 19);
308 EXT (BFD_RELOC_SPARC_REV32, 26);
309 default: return (reloc_howto_type *) NULL;
315 STD (BFD_RELOC_16, 1);
316 STD (BFD_RELOC_32, 2);
317 STD (BFD_RELOC_8_PCREL, 4);
318 STD (BFD_RELOC_16_PCREL, 5);
319 STD (BFD_RELOC_32_PCREL, 6);
320 STD (BFD_RELOC_16_BASEREL, 9);
321 STD (BFD_RELOC_32_BASEREL, 10);
322 default: return (reloc_howto_type *) NULL;
328 Internal entry points
331 @file{aoutx.h} exports several routines for accessing the
332 contents of an a.out file, which are gathered and exported in
333 turn by various format specific files (eg sunos.c).
339 aout_@var{size}_swap_exec_header_in
342 void aout_@var{size}_swap_exec_header_in,
344 struct external_exec *raw_bytes,
345 struct internal_exec *execp);
348 Swap the information in an executable header @var{raw_bytes} taken
349 from a raw byte stream memory image into the internal exec header
350 structure @var{execp}.
353 #ifndef NAME_swap_exec_header_in
355 NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
357 struct external_exec *raw_bytes;
358 struct internal_exec *execp;
360 struct external_exec *bytes = (struct external_exec *)raw_bytes;
362 /* The internal_exec structure has some fields that are unused in this
363 configuration (IE for i960), so ensure that all such uninitialized
364 fields are zero'd out. There are places where two of these structs
365 are memcmp'd, and thus the contents do matter. */
366 memset ((PTR) execp, 0, sizeof (struct internal_exec));
367 /* Now fill in fields in the execp, from the bytes in the raw data. */
368 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
369 execp->a_text = GET_WORD (abfd, bytes->e_text);
370 execp->a_data = GET_WORD (abfd, bytes->e_data);
371 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
372 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
373 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
374 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
375 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
377 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
382 aout_@var{size}_swap_exec_header_out
385 void aout_@var{size}_swap_exec_header_out
387 struct internal_exec *execp,
388 struct external_exec *raw_bytes);
391 Swap the information in an internal exec header structure
392 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
395 NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
397 struct internal_exec *execp;
398 struct external_exec *raw_bytes;
400 struct external_exec *bytes = (struct external_exec *)raw_bytes;
402 /* Now fill in fields in the raw data, from the fields in the exec struct. */
403 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
404 PUT_WORD (abfd, execp->a_text , bytes->e_text);
405 PUT_WORD (abfd, execp->a_data , bytes->e_data);
406 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
407 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
408 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
409 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
410 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
413 /* Make all the section for an a.out file. */
416 NAME(aout,make_sections) (abfd)
419 if (obj_textsec (abfd) == (asection *) NULL
420 && bfd_make_section (abfd, ".text") == (asection *) NULL)
422 if (obj_datasec (abfd) == (asection *) NULL
423 && bfd_make_section (abfd, ".data") == (asection *) NULL)
425 if (obj_bsssec (abfd) == (asection *) NULL
426 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
433 aout_@var{size}_some_aout_object_p
436 const bfd_target *aout_@var{size}_some_aout_object_p
438 const bfd_target *(*callback_to_real_object_p) ());
441 Some a.out variant thinks that the file open in @var{abfd}
442 checking is an a.out file. Do some more checking, and set up
443 for access if it really is. Call back to the calling
444 environment's "finish up" function just before returning, to
445 handle any last-minute setup.
449 NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
451 struct internal_exec *execp;
452 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
454 struct aout_data_struct *rawptr, *oldrawptr;
455 const bfd_target *result;
457 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
461 oldrawptr = abfd->tdata.aout_data;
462 abfd->tdata.aout_data = rawptr;
464 /* Copy the contents of the old tdata struct.
465 In particular, we want the subformat, since for hpux it was set in
466 hp300hpux.c:swap_exec_header_in and will be used in
467 hp300hpux.c:callback. */
468 if (oldrawptr != NULL)
469 *abfd->tdata.aout_data = *oldrawptr;
471 abfd->tdata.aout_data->a.hdr = &rawptr->e;
472 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */
473 execp = abfd->tdata.aout_data->a.hdr;
475 /* Set the file flags */
476 abfd->flags = BFD_NO_FLAGS;
477 if (execp->a_drsize || execp->a_trsize)
478 abfd->flags |= HAS_RELOC;
479 /* Setting of EXEC_P has been deferred to the bottom of this function */
481 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
482 if (N_DYNAMIC(*execp))
483 abfd->flags |= DYNAMIC;
485 if (N_MAGIC (*execp) == ZMAGIC)
487 abfd->flags |= D_PAGED | WP_TEXT;
488 adata (abfd).magic = z_magic;
490 else if (N_MAGIC (*execp) == QMAGIC)
492 abfd->flags |= D_PAGED | WP_TEXT;
493 adata (abfd).magic = z_magic;
494 adata (abfd).subformat = q_magic_format;
496 else if (N_MAGIC (*execp) == NMAGIC)
498 abfd->flags |= WP_TEXT;
499 adata (abfd).magic = n_magic;
501 else if (N_MAGIC (*execp) == OMAGIC
502 || N_MAGIC (*execp) == BMAGIC)
503 adata (abfd).magic = o_magic;
506 /* Should have been checked with N_BADMAG before this routine
511 bfd_get_start_address (abfd) = execp->a_entry;
513 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
514 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
516 /* The default relocation entry size is that of traditional V7 Unix. */
517 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
519 /* The default symbol entry size is that of traditional Unix. */
520 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
523 bfd_init_window (&obj_aout_sym_window (abfd));
524 bfd_init_window (&obj_aout_string_window (abfd));
526 obj_aout_external_syms (abfd) = NULL;
527 obj_aout_external_strings (abfd) = NULL;
528 obj_aout_sym_hashes (abfd) = NULL;
530 if (! NAME(aout,make_sections) (abfd))
533 obj_datasec (abfd)->_raw_size = execp->a_data;
534 obj_bsssec (abfd)->_raw_size = execp->a_bss;
536 obj_textsec (abfd)->flags =
537 (execp->a_trsize != 0
538 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
539 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
540 obj_datasec (abfd)->flags =
541 (execp->a_drsize != 0
542 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
543 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
544 obj_bsssec (abfd)->flags = SEC_ALLOC;
546 #ifdef THIS_IS_ONLY_DOCUMENTATION
547 /* The common code can't fill in these things because they depend
548 on either the start address of the text segment, the rounding
549 up of virtual addresses between segments, or the starting file
550 position of the text segment -- all of which varies among different
551 versions of a.out. */
553 /* Call back to the format-dependent code to fill in the rest of the
554 fields and do any further cleanup. Things that should be filled
555 in by the callback: */
557 struct exec *execp = exec_hdr (abfd);
559 obj_textsec (abfd)->size = N_TXTSIZE(*execp);
560 obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp);
561 /* data and bss are already filled in since they're so standard */
563 /* The virtual memory addresses of the sections */
564 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
565 obj_datasec (abfd)->vma = N_DATADDR(*execp);
566 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
568 /* The file offsets of the sections */
569 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
570 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
572 /* The file offsets of the relocation info */
573 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
574 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
576 /* The file offsets of the string table and symbol table. */
577 obj_str_filepos (abfd) = N_STROFF (*execp);
578 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
580 /* Determine the architecture and machine type of the object file. */
581 switch (N_MACHTYPE (*exec_hdr (abfd))) {
583 abfd->obj_arch = bfd_arch_obscure;
587 adata(abfd)->page_size = TARGET_PAGE_SIZE;
588 adata(abfd)->segment_size = SEGMENT_SIZE;
589 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
593 /* The architecture is encoded in various ways in various a.out variants,
594 or is not encoded at all in some of them. The relocation size depends
595 on the architecture and the a.out variant. Finally, the return value
596 is the bfd_target vector in use. If an error occurs, return zero and
597 set bfd_error to the appropriate error code.
599 Formats such as b.out, which have additional fields in the a.out
600 header, should cope with them in this callback as well. */
601 #endif /* DOCUMENTATION */
603 result = (*callback_to_real_object_p) (abfd);
605 /* Now that the segment addresses have been worked out, take a better
606 guess at whether the file is executable. If the entry point
607 is within the text segment, assume it is. (This makes files
608 executable even if their entry point address is 0, as long as
609 their text starts at zero.).
611 This test had to be changed to deal with systems where the text segment
612 runs at a different location than the default. The problem is that the
613 entry address can appear to be outside the text segment, thus causing an
614 erroneous conclusion that the file isn't executable.
616 To fix this, we now accept any non-zero entry point as an indication of
617 executability. This will work most of the time, since only the linker
618 sets the entry point, and that is likely to be non-zero for most systems. */
620 if (execp->a_entry != 0
621 || (execp->a_entry >= obj_textsec(abfd)->vma
622 && execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
623 abfd->flags |= EXEC_P;
627 struct stat stat_buf;
629 /* The original heuristic doesn't work in some important cases.
630 The a.out file has no information about the text start
631 address. For files (like kernels) linked to non-standard
632 addresses (ld -Ttext nnn) the entry point may not be between
633 the default text start (obj_textsec(abfd)->vma) and
634 (obj_textsec(abfd)->vma) + text size. This is not just a mach
635 issue. Many kernels are loaded at non standard addresses. */
636 if (abfd->iostream != NULL
637 && (abfd->flags & BFD_IN_MEMORY) == 0
638 && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0)
639 && ((stat_buf.st_mode & 0111) != 0))
640 abfd->flags |= EXEC_P;
642 #endif /* STAT_FOR_EXEC */
646 #if 0 /* These should be set correctly anyways. */
647 abfd->sections = obj_textsec (abfd);
648 obj_textsec (abfd)->next = obj_datasec (abfd);
649 obj_datasec (abfd)->next = obj_bsssec (abfd);
655 abfd->tdata.aout_data = oldrawptr;
662 aout_@var{size}_mkobject
665 boolean aout_@var{size}_mkobject, (bfd *abfd);
668 Initialize BFD @var{abfd} for use with a.out files.
672 NAME(aout,mkobject) (abfd)
675 struct aout_data_struct *rawptr;
677 bfd_set_error (bfd_error_system_call);
679 /* Use an intermediate variable for clarity */
680 rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
685 abfd->tdata.aout_data = rawptr;
686 exec_hdr (abfd) = &(rawptr->e);
688 obj_textsec (abfd) = (asection *)NULL;
689 obj_datasec (abfd) = (asection *)NULL;
690 obj_bsssec (abfd) = (asection *)NULL;
697 aout_@var{size}_machine_type
700 enum machine_type aout_@var{size}_machine_type
701 (enum bfd_architecture arch,
702 unsigned long machine));
705 Keep track of machine architecture and machine type for
706 a.out's. Return the <<machine_type>> for a particular
707 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
708 and machine can't be represented in a.out format.
710 If the architecture is understood, machine type 0 (default)
711 is always understood.
715 NAME(aout,machine_type) (arch, machine, unknown)
716 enum bfd_architecture arch;
717 unsigned long machine;
720 enum machine_type arch_flags;
722 arch_flags = M_UNKNOWN;
728 || machine == bfd_mach_sparc
729 || machine == bfd_mach_sparc_sparclite
730 || machine == bfd_mach_sparc_sparclite_le
731 || machine == bfd_mach_sparc_v9)
732 arch_flags = M_SPARC;
733 else if (machine == bfd_mach_sparc_sparclet)
734 arch_flags = M_SPARCLET;
739 case 0: arch_flags = M_68010; break;
740 case bfd_mach_m68000: arch_flags = M_UNKNOWN; *unknown = false; break;
741 case bfd_mach_m68010: arch_flags = M_68010; break;
742 case bfd_mach_m68020: arch_flags = M_68020; break;
743 default: arch_flags = M_UNKNOWN; break;
748 if (machine == 0) arch_flags = M_386;
752 if (machine == 0) arch_flags = M_29K;
756 if (machine == 0) arch_flags = M_ARM;
762 case bfd_mach_mips3000:
763 case bfd_mach_mips3900:
764 arch_flags = M_MIPS1;
766 case bfd_mach_mips6000:
767 arch_flags = M_MIPS2;
769 case bfd_mach_mips4000:
770 case bfd_mach_mips4010:
771 case bfd_mach_mips4100:
772 case bfd_mach_mips4300:
773 case bfd_mach_mips4400:
774 case bfd_mach_mips4600:
775 case bfd_mach_mips4650:
776 case bfd_mach_mips8000:
777 case bfd_mach_mips10000:
778 case bfd_mach_mips16:
779 case bfd_mach_mips32:
780 case bfd_mach_mips32_4k:
781 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
782 arch_flags = M_MIPS2;
785 arch_flags = M_UNKNOWN;
792 case 0: arch_flags = M_NS32532; break;
793 case 32032: arch_flags = M_NS32032; break;
794 case 32532: arch_flags = M_NS32532; break;
795 default: arch_flags = M_UNKNOWN; break;
804 if (machine == 0 || machine == 255) arch_flags = M_CRIS;
808 arch_flags = M_UNKNOWN;
811 if (arch_flags != M_UNKNOWN)
819 aout_@var{size}_set_arch_mach
822 boolean aout_@var{size}_set_arch_mach,
824 enum bfd_architecture arch,
825 unsigned long machine));
828 Set the architecture and the machine of the BFD @var{abfd} to the
829 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
830 can support the architecture required.
834 NAME(aout,set_arch_mach) (abfd, arch, machine)
836 enum bfd_architecture arch;
837 unsigned long machine;
839 if (! bfd_default_set_arch_mach (abfd, arch, machine))
842 if (arch != bfd_arch_unknown)
846 NAME(aout,machine_type) (arch, machine, &unknown);
851 /* Determine the size of a relocation entry */
856 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
859 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
863 return (*aout_backend_info(abfd)->set_sizes) (abfd);
867 adjust_o_magic (abfd, execp)
869 struct internal_exec *execp;
871 file_ptr pos = adata (abfd).exec_bytes_size;
876 obj_textsec(abfd)->filepos = pos;
877 if (!obj_textsec(abfd)->user_set_vma)
878 obj_textsec(abfd)->vma = vma;
880 vma = obj_textsec(abfd)->vma;
882 pos += obj_textsec(abfd)->_raw_size;
883 vma += obj_textsec(abfd)->_raw_size;
886 if (!obj_datasec(abfd)->user_set_vma)
888 #if 0 /* ?? Does alignment in the file image really matter? */
889 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
891 obj_textsec(abfd)->_raw_size += pad;
894 obj_datasec(abfd)->vma = vma;
897 vma = obj_datasec(abfd)->vma;
898 obj_datasec(abfd)->filepos = pos;
899 pos += obj_datasec(abfd)->_raw_size;
900 vma += obj_datasec(abfd)->_raw_size;
903 if (!obj_bsssec(abfd)->user_set_vma)
906 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
908 obj_datasec(abfd)->_raw_size += pad;
911 obj_bsssec(abfd)->vma = vma;
915 /* The VMA of the .bss section is set by the the VMA of the
916 .data section plus the size of the .data section. We may
917 need to add padding bytes to make this true. */
918 pad = obj_bsssec (abfd)->vma - vma;
921 obj_datasec (abfd)->_raw_size += pad;
925 obj_bsssec(abfd)->filepos = pos;
927 /* Fix up the exec header. */
928 execp->a_text = obj_textsec(abfd)->_raw_size;
929 execp->a_data = obj_datasec(abfd)->_raw_size;
930 execp->a_bss = obj_bsssec(abfd)->_raw_size;
931 N_SET_MAGIC (*execp, OMAGIC);
935 adjust_z_magic (abfd, execp)
937 struct internal_exec *execp;
939 bfd_size_type data_pad, text_pad;
941 CONST struct aout_backend_data *abdp;
942 int ztih; /* Nonzero if text includes exec header. */
944 abdp = aout_backend_info (abfd);
948 && (abdp->text_includes_header
949 || obj_aout_subformat (abfd) == q_magic_format));
950 obj_textsec(abfd)->filepos = (ztih
951 ? adata(abfd).exec_bytes_size
952 : adata(abfd).zmagic_disk_block_size);
953 if (! obj_textsec(abfd)->user_set_vma)
955 /* ?? Do we really need to check for relocs here? */
956 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
959 ? (abdp->default_text_vma
960 + adata(abfd).exec_bytes_size)
961 : abdp->default_text_vma));
966 /* The .text section is being loaded at an unusual address. We
967 may need to pad it such that the .data section starts at a page
970 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
971 & (adata (abfd).page_size - 1));
973 text_pad = ((- obj_textsec (abfd)->vma)
974 & (adata (abfd).page_size - 1));
977 /* Find start of data. */
980 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
981 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
985 /* Note that if page_size == zmagic_disk_block_size, then
986 filepos == page_size, and this case is the same as the ztih
988 text_end = obj_textsec (abfd)->_raw_size;
989 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
990 text_end += obj_textsec (abfd)->filepos;
992 obj_textsec(abfd)->_raw_size += text_pad;
993 text_end += text_pad;
996 if (!obj_datasec(abfd)->user_set_vma)
999 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
1000 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1002 if (abdp && abdp->zmagic_mapped_contiguous)
1004 text_pad = (obj_datasec(abfd)->vma
1005 - obj_textsec(abfd)->vma
1006 - obj_textsec(abfd)->_raw_size);
1007 obj_textsec(abfd)->_raw_size += text_pad;
1009 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
1010 + obj_textsec(abfd)->_raw_size);
1012 /* Fix up exec header while we're at it. */
1013 execp->a_text = obj_textsec(abfd)->_raw_size;
1014 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1015 execp->a_text += adata(abfd).exec_bytes_size;
1016 if (obj_aout_subformat (abfd) == q_magic_format)
1017 N_SET_MAGIC (*execp, QMAGIC);
1019 N_SET_MAGIC (*execp, ZMAGIC);
1021 /* Spec says data section should be rounded up to page boundary. */
1022 obj_datasec(abfd)->_raw_size
1023 = align_power (obj_datasec(abfd)->_raw_size,
1024 obj_bsssec(abfd)->alignment_power);
1025 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
1026 adata(abfd).page_size);
1027 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
1030 if (!obj_bsssec(abfd)->user_set_vma)
1031 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
1032 + obj_datasec(abfd)->_raw_size);
1033 /* If the BSS immediately follows the data section and extra space
1034 in the page is left after the data section, fudge data
1035 in the header so that the bss section looks smaller by that
1036 amount. We'll start the bss section there, and lie to the OS.
1037 (Note that a linker script, as well as the above assignment,
1038 could have explicitly set the BSS vma to immediately follow
1039 the data section.) */
1040 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
1041 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
1042 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
1043 obj_bsssec(abfd)->_raw_size - data_pad;
1045 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1049 adjust_n_magic (abfd, execp)
1051 struct internal_exec *execp;
1053 file_ptr pos = adata(abfd).exec_bytes_size;
1058 obj_textsec(abfd)->filepos = pos;
1059 if (!obj_textsec(abfd)->user_set_vma)
1060 obj_textsec(abfd)->vma = vma;
1062 vma = obj_textsec(abfd)->vma;
1063 pos += obj_textsec(abfd)->_raw_size;
1064 vma += obj_textsec(abfd)->_raw_size;
1067 obj_datasec(abfd)->filepos = pos;
1068 if (!obj_datasec(abfd)->user_set_vma)
1069 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1070 vma = obj_datasec(abfd)->vma;
1072 /* Since BSS follows data immediately, see if it needs alignment. */
1073 vma += obj_datasec(abfd)->_raw_size;
1074 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
1075 obj_datasec(abfd)->_raw_size += pad;
1076 pos += obj_datasec(abfd)->_raw_size;
1079 if (!obj_bsssec(abfd)->user_set_vma)
1080 obj_bsssec(abfd)->vma = vma;
1082 vma = obj_bsssec(abfd)->vma;
1084 /* Fix up exec header. */
1085 execp->a_text = obj_textsec(abfd)->_raw_size;
1086 execp->a_data = obj_datasec(abfd)->_raw_size;
1087 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1088 N_SET_MAGIC (*execp, NMAGIC);
1092 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1094 bfd_size_type *text_size;
1095 file_ptr *text_end ATTRIBUTE_UNUSED;
1097 struct internal_exec *execp = exec_hdr (abfd);
1099 if (! NAME(aout,make_sections) (abfd))
1102 if (adata(abfd).magic != undecided_magic)
1105 obj_textsec(abfd)->_raw_size =
1106 align_power(obj_textsec(abfd)->_raw_size,
1107 obj_textsec(abfd)->alignment_power);
1109 *text_size = obj_textsec (abfd)->_raw_size;
1110 /* Rule (heuristic) for when to pad to a new page. Note that there
1111 are (at least) two ways demand-paged (ZMAGIC) files have been
1112 handled. Most Berkeley-based systems start the text segment at
1113 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1114 segment right after the exec header; the latter is counted in the
1115 text segment size, and is paged in by the kernel with the rest of
1118 /* This perhaps isn't the right way to do this, but made it simpler for me
1119 to understand enough to implement it. Better would probably be to go
1120 right from BFD flags to alignment/positioning characteristics. But the
1121 old code was sloppy enough about handling the flags, and had enough
1122 other magic, that it was a little hard for me to understand. I think
1123 I understand it better now, but I haven't time to do the cleanup this
1126 if (abfd->flags & D_PAGED)
1127 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1128 adata(abfd).magic = z_magic;
1129 else if (abfd->flags & WP_TEXT)
1130 adata(abfd).magic = n_magic;
1132 adata(abfd).magic = o_magic;
1134 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1136 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1138 switch (adata(abfd).magic) {
1139 case n_magic: str = "NMAGIC"; break;
1140 case o_magic: str = "OMAGIC"; break;
1141 case z_magic: str = "ZMAGIC"; break;
1146 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1147 obj_textsec(abfd)->alignment_power,
1148 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1149 obj_datasec(abfd)->alignment_power,
1150 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
1151 obj_bsssec(abfd)->alignment_power);
1155 switch (adata(abfd).magic)
1158 adjust_o_magic (abfd, execp);
1161 adjust_z_magic (abfd, execp);
1164 adjust_n_magic (abfd, execp);
1170 #ifdef BFD_AOUT_DEBUG
1171 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1172 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1173 obj_textsec(abfd)->filepos,
1174 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1175 obj_datasec(abfd)->filepos,
1176 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
1184 aout_@var{size}_new_section_hook
1187 boolean aout_@var{size}_new_section_hook,
1189 asection *newsect));
1192 Called by the BFD in response to a @code{bfd_make_section}
1196 NAME(aout,new_section_hook) (abfd, newsect)
1200 /* align to double at least */
1201 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1203 if (bfd_get_format (abfd) == bfd_object)
1205 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1206 obj_textsec(abfd)= newsect;
1207 newsect->target_index = N_TEXT;
1211 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1212 obj_datasec(abfd) = newsect;
1213 newsect->target_index = N_DATA;
1217 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1218 obj_bsssec(abfd) = newsect;
1219 newsect->target_index = N_BSS;
1225 /* We allow more than three sections internally */
1230 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1235 bfd_size_type count;
1238 bfd_size_type text_size;
1240 if (! abfd->output_has_begun)
1242 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1246 if (section == obj_bsssec (abfd))
1248 bfd_set_error (bfd_error_no_contents);
1252 if (section != obj_textsec (abfd)
1253 && section != obj_datasec (abfd))
1255 (*_bfd_error_handler)
1256 (_("%s: can not represent section `%s' in a.out object file format"),
1257 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1258 bfd_set_error (bfd_error_nonrepresentable_section);
1264 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1265 || bfd_write (location, 1, count, abfd) != count)
1272 /* Read the external symbols from an a.out file. */
1275 aout_get_external_symbols (abfd)
1278 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1280 bfd_size_type count;
1281 struct external_nlist *syms;
1283 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1286 if (bfd_get_file_window (abfd,
1287 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms,
1288 &obj_aout_sym_window (abfd), true) == false)
1290 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1292 /* We allocate using malloc to make the values easy to free
1293 later on. If we put them on the objalloc it might not be
1294 possible to free them. */
1295 syms = ((struct external_nlist *)
1296 bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1297 if (syms == (struct external_nlist *) NULL && count != 0)
1300 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1301 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1302 != exec_hdr (abfd)->a_syms))
1309 obj_aout_external_syms (abfd) = syms;
1310 obj_aout_external_sym_count (abfd) = count;
1313 if (obj_aout_external_strings (abfd) == NULL
1314 && exec_hdr (abfd)->a_syms != 0)
1316 unsigned char string_chars[BYTES_IN_WORD];
1317 bfd_size_type stringsize;
1320 /* Get the size of the strings. */
1321 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1322 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1325 stringsize = GET_WORD (abfd, string_chars);
1328 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1329 &obj_aout_string_window (abfd), true) == false)
1331 strings = (char *) obj_aout_string_window (abfd).data;
1333 strings = (char *) bfd_malloc ((size_t) stringsize + 1);
1334 if (strings == NULL)
1337 /* Skip space for the string count in the buffer for convenience
1338 when using indexes. */
1339 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1341 != stringsize - BYTES_IN_WORD)
1348 /* Ensure that a zero index yields an empty string. */
1351 strings[stringsize - 1] = 0;
1353 obj_aout_external_strings (abfd) = strings;
1354 obj_aout_external_string_size (abfd) = stringsize;
1360 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1361 and symbol->value fields of CACHE_PTR will be set from the a.out
1362 nlist structure. This function is responsible for setting
1363 symbol->flags and symbol->section, and adjusting symbol->value. */
1366 translate_from_native_sym_flags (abfd, cache_ptr)
1368 aout_symbol_type *cache_ptr;
1372 if ((cache_ptr->type & N_STAB) != 0
1373 || cache_ptr->type == N_FN)
1377 /* This is a debugging symbol. */
1379 cache_ptr->symbol.flags = BSF_DEBUGGING;
1381 /* Work out the symbol section. */
1382 switch (cache_ptr->type & N_TYPE)
1386 sec = obj_textsec (abfd);
1389 sec = obj_datasec (abfd);
1392 sec = obj_bsssec (abfd);
1396 sec = bfd_abs_section_ptr;
1400 cache_ptr->symbol.section = sec;
1401 cache_ptr->symbol.value -= sec->vma;
1406 /* Get the default visibility. This does not apply to all types, so
1407 we just hold it in a local variable to use if wanted. */
1408 if ((cache_ptr->type & N_EXT) == 0)
1409 visible = BSF_LOCAL;
1411 visible = BSF_GLOBAL;
1413 switch (cache_ptr->type)
1416 case N_ABS: case N_ABS | N_EXT:
1417 cache_ptr->symbol.section = bfd_abs_section_ptr;
1418 cache_ptr->symbol.flags = visible;
1421 case N_UNDF | N_EXT:
1422 if (cache_ptr->symbol.value != 0)
1424 /* This is a common symbol. */
1425 cache_ptr->symbol.flags = BSF_GLOBAL;
1426 cache_ptr->symbol.section = bfd_com_section_ptr;
1430 cache_ptr->symbol.flags = 0;
1431 cache_ptr->symbol.section = bfd_und_section_ptr;
1435 case N_TEXT: case N_TEXT | N_EXT:
1436 cache_ptr->symbol.section = obj_textsec (abfd);
1437 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1438 cache_ptr->symbol.flags = visible;
1441 /* N_SETV symbols used to represent set vectors placed in the
1442 data section. They are no longer generated. Theoretically,
1443 it was possible to extract the entries and combine them with
1444 new ones, although I don't know if that was ever actually
1445 done. Unless that feature is restored, treat them as data
1447 case N_SETV: case N_SETV | N_EXT:
1448 case N_DATA: case N_DATA | N_EXT:
1449 cache_ptr->symbol.section = obj_datasec (abfd);
1450 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1451 cache_ptr->symbol.flags = visible;
1454 case N_BSS: case N_BSS | N_EXT:
1455 cache_ptr->symbol.section = obj_bsssec (abfd);
1456 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1457 cache_ptr->symbol.flags = visible;
1460 case N_SETA: case N_SETA | N_EXT:
1461 case N_SETT: case N_SETT | N_EXT:
1462 case N_SETD: case N_SETD | N_EXT:
1463 case N_SETB: case N_SETB | N_EXT:
1465 /* This code is no longer needed. It used to be used to make
1466 the linker handle set symbols, but they are now handled in
1467 the add_symbols routine instead. */
1470 arelent_chain *reloc;
1471 asection *into_section;
1473 /* This is a set symbol. The name of the symbol is the name
1474 of the set (e.g., __CTOR_LIST__). The value of the symbol
1475 is the value to add to the set. We create a section with
1476 the same name as the symbol, and add a reloc to insert the
1477 appropriate value into the section.
1479 This action is actually obsolete; it used to make the
1480 linker do the right thing, but the linker no longer uses
1483 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1484 if (section == NULL)
1488 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1492 strcpy (copy, cache_ptr->symbol.name);
1493 section = bfd_make_section (abfd, copy);
1494 if (section == NULL)
1498 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1502 /* Build a relocation entry for the constructor. */
1503 switch (cache_ptr->type & N_TYPE)
1506 into_section = bfd_abs_section_ptr;
1507 cache_ptr->type = N_ABS;
1510 into_section = obj_textsec (abfd);
1511 cache_ptr->type = N_TEXT;
1514 into_section = obj_datasec (abfd);
1515 cache_ptr->type = N_DATA;
1518 into_section = obj_bsssec (abfd);
1519 cache_ptr->type = N_BSS;
1523 /* Build a relocation pointing into the constructor section
1524 pointing at the symbol in the set vector specified. */
1525 reloc->relent.addend = cache_ptr->symbol.value;
1526 cache_ptr->symbol.section = into_section;
1527 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1529 /* We modify the symbol to belong to a section depending upon
1530 the name of the symbol, and add to the size of the section
1531 to contain a pointer to the symbol. Build a reloc entry to
1532 relocate to this symbol attached to this section. */
1533 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1535 section->reloc_count++;
1536 section->alignment_power = 2;
1538 reloc->next = section->constructor_chain;
1539 section->constructor_chain = reloc;
1540 reloc->relent.address = section->_raw_size;
1541 section->_raw_size += BYTES_IN_WORD;
1543 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd);
1547 switch (cache_ptr->type & N_TYPE)
1550 cache_ptr->symbol.section = bfd_abs_section_ptr;
1553 cache_ptr->symbol.section = obj_textsec (abfd);
1556 cache_ptr->symbol.section = obj_datasec (abfd);
1559 cache_ptr->symbol.section = obj_bsssec (abfd);
1563 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1568 /* This symbol is the text of a warning message. The next
1569 symbol is the symbol to associate the warning with. If a
1570 reference is made to that symbol, a warning is issued. */
1571 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1572 cache_ptr->symbol.section = bfd_abs_section_ptr;
1575 case N_INDR: case N_INDR | N_EXT:
1576 /* An indirect symbol. This consists of two symbols in a row.
1577 The first symbol is the name of the indirection. The second
1578 symbol is the name of the target. A reference to the first
1579 symbol becomes a reference to the second. */
1580 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1581 cache_ptr->symbol.section = bfd_ind_section_ptr;
1585 cache_ptr->symbol.section = bfd_und_section_ptr;
1586 cache_ptr->symbol.flags = BSF_WEAK;
1590 cache_ptr->symbol.section = bfd_abs_section_ptr;
1591 cache_ptr->symbol.flags = BSF_WEAK;
1595 cache_ptr->symbol.section = obj_textsec (abfd);
1596 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1597 cache_ptr->symbol.flags = BSF_WEAK;
1601 cache_ptr->symbol.section = obj_datasec (abfd);
1602 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1603 cache_ptr->symbol.flags = BSF_WEAK;
1607 cache_ptr->symbol.section = obj_bsssec (abfd);
1608 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1609 cache_ptr->symbol.flags = BSF_WEAK;
1616 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1619 translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1622 struct external_nlist *sym_pointer;
1624 bfd_vma value = cache_ptr->value;
1628 /* Mask out any existing type bits in case copying from one section
1630 sym_pointer->e_type[0] &= ~N_TYPE;
1632 sec = bfd_get_section (cache_ptr);
1637 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1639 (*_bfd_error_handler)
1640 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1641 bfd_get_filename (abfd),
1642 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1643 bfd_set_error (bfd_error_nonrepresentable_section);
1647 if (sec->output_section != NULL)
1649 off = sec->output_offset;
1650 sec = sec->output_section;
1653 if (bfd_is_abs_section (sec))
1654 sym_pointer->e_type[0] |= N_ABS;
1655 else if (sec == obj_textsec (abfd))
1656 sym_pointer->e_type[0] |= N_TEXT;
1657 else if (sec == obj_datasec (abfd))
1658 sym_pointer->e_type[0] |= N_DATA;
1659 else if (sec == obj_bsssec (abfd))
1660 sym_pointer->e_type[0] |= N_BSS;
1661 else if (bfd_is_und_section (sec))
1662 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1663 else if (bfd_is_ind_section (sec))
1664 sym_pointer->e_type[0] = N_INDR;
1665 else if (bfd_is_com_section (sec))
1666 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1669 (*_bfd_error_handler)
1670 (_("%s: can not represent section `%s' in a.out object file format"),
1671 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1672 bfd_set_error (bfd_error_nonrepresentable_section);
1676 /* Turn the symbol from section relative to absolute again */
1677 value += sec->vma + off;
1679 if ((cache_ptr->flags & BSF_WARNING) != 0)
1680 sym_pointer->e_type[0] = N_WARNING;
1682 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1683 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1684 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1685 sym_pointer->e_type[0] |= N_EXT;
1686 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1687 sym_pointer->e_type[0] &= ~N_EXT;
1689 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1691 int type = ((aout_symbol_type *) cache_ptr)->type;
1694 case N_ABS: type = N_SETA; break;
1695 case N_TEXT: type = N_SETT; break;
1696 case N_DATA: type = N_SETD; break;
1697 case N_BSS: type = N_SETB; break;
1699 sym_pointer->e_type[0] = type;
1702 if ((cache_ptr->flags & BSF_WEAK) != 0)
1706 switch (sym_pointer->e_type[0] & N_TYPE)
1709 case N_ABS: type = N_WEAKA; break;
1710 case N_TEXT: type = N_WEAKT; break;
1711 case N_DATA: type = N_WEAKD; break;
1712 case N_BSS: type = N_WEAKB; break;
1713 case N_UNDF: type = N_WEAKU; break;
1715 sym_pointer->e_type[0] = type;
1718 PUT_WORD(abfd, value, sym_pointer->e_value);
1723 /* Native-level interface to symbols. */
1726 NAME(aout,make_empty_symbol) (abfd)
1729 aout_symbol_type *new =
1730 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1733 new->symbol.the_bfd = abfd;
1735 return &new->symbol;
1738 /* Translate a set of internal symbols into external symbols. */
1741 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1743 aout_symbol_type *in;
1744 struct external_nlist *ext;
1745 bfd_size_type count;
1747 bfd_size_type strsize;
1750 struct external_nlist *ext_end;
1752 ext_end = ext + count;
1753 for (; ext < ext_end; ext++, in++)
1757 x = GET_WORD (abfd, ext->e_strx);
1758 in->symbol.the_bfd = abfd;
1760 /* For the normal symbols, the zero index points at the number
1761 of bytes in the string table but is to be interpreted as the
1762 null string. For the dynamic symbols, the number of bytes in
1763 the string table is stored in the __DYNAMIC structure and the
1764 zero index points at an actual string. */
1765 if (x == 0 && ! dynamic)
1766 in->symbol.name = "";
1767 else if (x < strsize)
1768 in->symbol.name = str + x;
1772 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1773 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1774 in->other = bfd_h_get_8 (abfd, ext->e_other);
1775 in->type = bfd_h_get_8 (abfd, ext->e_type);
1776 in->symbol.udata.p = NULL;
1778 if (! translate_from_native_sym_flags (abfd, in))
1782 in->symbol.flags |= BSF_DYNAMIC;
1788 /* We read the symbols into a buffer, which is discarded when this
1789 function exits. We read the strings into a buffer large enough to
1790 hold them all plus all the cached symbol entries. */
1793 NAME(aout,slurp_symbol_table) (abfd)
1796 struct external_nlist *old_external_syms;
1797 aout_symbol_type *cached;
1800 /* If there's no work to be done, don't do any */
1801 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1804 old_external_syms = obj_aout_external_syms (abfd);
1806 if (! aout_get_external_symbols (abfd))
1809 cached_size = (obj_aout_external_sym_count (abfd)
1810 * sizeof (aout_symbol_type));
1811 cached = (aout_symbol_type *) bfd_malloc (cached_size);
1812 if (cached == NULL && cached_size != 0)
1814 if (cached_size != 0)
1815 memset (cached, 0, cached_size);
1817 /* Convert from external symbol information to internal. */
1818 if (! (NAME(aout,translate_symbol_table)
1820 obj_aout_external_syms (abfd),
1821 obj_aout_external_sym_count (abfd),
1822 obj_aout_external_strings (abfd),
1823 obj_aout_external_string_size (abfd),
1830 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1832 obj_aout_symbols (abfd) = cached;
1834 /* It is very likely that anybody who calls this function will not
1835 want the external symbol information, so if it was allocated
1836 because of our call to aout_get_external_symbols, we free it up
1837 right away to save space. */
1838 if (old_external_syms == (struct external_nlist *) NULL
1839 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1842 bfd_free_window (&obj_aout_sym_window (abfd));
1844 free (obj_aout_external_syms (abfd));
1846 obj_aout_external_syms (abfd) = NULL;
1852 /* We use a hash table when writing out symbols so that we only write
1853 out a particular string once. This helps particularly when the
1854 linker writes out stabs debugging entries, because each different
1855 contributing object file tends to have many duplicate stabs
1858 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1859 if BFD_TRADITIONAL_FORMAT is set. */
1861 static bfd_size_type add_to_stringtab
1862 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean));
1863 static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *));
1865 /* Get the index of a string in a strtab, adding it if it is not
1868 static INLINE bfd_size_type
1869 add_to_stringtab (abfd, tab, str, copy)
1871 struct bfd_strtab_hash *tab;
1876 bfd_size_type index;
1878 /* An index of 0 always means the empty string. */
1879 if (str == 0 || *str == '\0')
1882 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1883 doesn't understand a hashed string table. */
1885 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1888 index = _bfd_stringtab_add (tab, str, hash, copy);
1890 if (index != (bfd_size_type) -1)
1892 /* Add BYTES_IN_WORD to the return value to account for the
1893 space taken up by the string table size. */
1894 index += BYTES_IN_WORD;
1900 /* Write out a strtab. ABFD is already at the right location in the
1904 emit_stringtab (abfd, tab)
1906 struct bfd_strtab_hash *tab;
1908 bfd_byte buffer[BYTES_IN_WORD];
1910 /* The string table starts with the size. */
1911 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1912 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1915 return _bfd_stringtab_emit (abfd, tab);
1919 NAME(aout,write_syms) (abfd)
1922 unsigned int count ;
1923 asymbol **generic = bfd_get_outsymbols (abfd);
1924 struct bfd_strtab_hash *strtab;
1926 strtab = _bfd_stringtab_init ();
1930 for (count = 0; count < bfd_get_symcount (abfd); count++)
1932 asymbol *g = generic[count];
1934 struct external_nlist nsp;
1936 indx = add_to_stringtab (abfd, strtab, g->name, false);
1937 if (indx == (bfd_size_type) -1)
1939 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1941 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
1943 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
1944 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
1945 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
1949 bfd_h_put_16(abfd,0, nsp.e_desc);
1950 bfd_h_put_8(abfd, 0, nsp.e_other);
1951 bfd_h_put_8(abfd, 0, nsp.e_type);
1954 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1957 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
1958 != EXTERNAL_NLIST_SIZE)
1961 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1962 here, at the end. */
1966 if (! emit_stringtab (abfd, strtab))
1969 _bfd_stringtab_free (strtab);
1974 _bfd_stringtab_free (strtab);
1980 NAME(aout,get_symtab) (abfd, location)
1984 unsigned int counter = 0;
1985 aout_symbol_type *symbase;
1987 if (!NAME(aout,slurp_symbol_table) (abfd))
1990 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
1991 *(location++) = (asymbol *) ( symbase++);
1993 return bfd_get_symcount (abfd);
1997 /* Standard reloc stuff */
1998 /* Output standard relocation information to a file in target byte order. */
2000 extern void NAME(aout,swap_std_reloc_out)
2001 PARAMS ((bfd *, arelent *, struct reloc_std_external *));
2004 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
2007 struct reloc_std_external *natptr;
2010 asymbol *sym = *(g->sym_ptr_ptr);
2012 unsigned int r_length;
2014 int r_baserel, r_jmptable, r_relative;
2015 asection *output_section = sym->section->output_section;
2017 PUT_WORD(abfd, g->address, natptr->r_address);
2019 r_length = g->howto->size ; /* Size as a power of two */
2020 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
2021 /* XXX This relies on relocs coming from a.out files. */
2022 r_baserel = (g->howto->type & 8) != 0;
2023 r_jmptable = (g->howto->type & 16) != 0;
2024 r_relative = (g->howto->type & 32) != 0;
2027 /* For a standard reloc, the addend is in the object file. */
2028 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
2031 /* name was clobbered by aout_write_syms to be symbol index */
2033 /* If this relocation is relative to a symbol then set the
2034 r_index to the symbols index, and the r_extern bit.
2036 Absolute symbols can come in in two ways, either as an offset
2037 from the abs section, or as a symbol which has an abs value.
2041 if (bfd_is_com_section (output_section)
2042 || bfd_is_abs_section (output_section)
2043 || bfd_is_und_section (output_section))
2045 if (bfd_abs_section_ptr->symbol == sym)
2047 /* Whoops, looked like an abs symbol, but is really an offset
2048 from the abs section */
2054 /* Fill in symbol */
2056 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2062 /* Just an ordinary section */
2064 r_index = output_section->target_index;
2067 /* now the fun stuff */
2068 if (bfd_header_big_endian (abfd)) {
2069 natptr->r_index[0] = r_index >> 16;
2070 natptr->r_index[1] = r_index >> 8;
2071 natptr->r_index[2] = r_index;
2073 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
2074 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
2075 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
2076 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
2077 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
2078 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
2080 natptr->r_index[2] = r_index >> 16;
2081 natptr->r_index[1] = r_index >> 8;
2082 natptr->r_index[0] = r_index;
2084 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
2085 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
2086 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
2087 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
2088 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2089 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2093 /* Extended stuff */
2094 /* Output extended relocation information to a file in target byte order. */
2096 extern void NAME(aout,swap_ext_reloc_out)
2097 PARAMS ((bfd *, arelent *, struct reloc_ext_external *));
2100 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2103 register struct reloc_ext_external *natptr;
2107 unsigned int r_type;
2108 unsigned int r_addend;
2109 asymbol *sym = *(g->sym_ptr_ptr);
2110 asection *output_section = sym->section->output_section;
2112 PUT_WORD (abfd, g->address, natptr->r_address);
2114 r_type = (unsigned int) g->howto->type;
2116 r_addend = g->addend;
2117 if ((sym->flags & BSF_SECTION_SYM) != 0)
2118 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2120 /* If this relocation is relative to a symbol then set the
2121 r_index to the symbols index, and the r_extern bit.
2123 Absolute symbols can come in in two ways, either as an offset
2124 from the abs section, or as a symbol which has an abs value.
2125 check for that here. */
2127 if (bfd_is_abs_section (bfd_get_section (sym)))
2132 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2134 if (bfd_is_und_section (bfd_get_section (sym))
2135 || (sym->flags & BSF_GLOBAL) != 0)
2139 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2143 /* Just an ordinary section */
2145 r_index = output_section->target_index;
2148 /* now the fun stuff */
2149 if (bfd_header_big_endian (abfd)) {
2150 natptr->r_index[0] = r_index >> 16;
2151 natptr->r_index[1] = r_index >> 8;
2152 natptr->r_index[2] = r_index;
2154 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2155 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2157 natptr->r_index[2] = r_index >> 16;
2158 natptr->r_index[1] = r_index >> 8;
2159 natptr->r_index[0] = r_index;
2161 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2162 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2165 PUT_WORD (abfd, r_addend, natptr->r_addend);
2168 /* BFD deals internally with all things based from the section they're
2169 in. so, something in 10 bytes into a text section with a base of
2170 50 would have a symbol (.text+10) and know .text vma was 50.
2172 Aout keeps all it's symbols based from zero, so the symbol would
2173 contain 60. This macro subs the base of each section from the value
2174 to give the true offset from the section */
2176 #define MOVE_ADDRESS(ad) \
2178 /* undefined symbol */ \
2179 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2180 cache_ptr->addend = ad; \
2182 /* defined, section relative. replace symbol with pointer to \
2183 symbol which points to section */ \
2184 switch (r_index) { \
2186 case N_TEXT | N_EXT: \
2187 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2188 cache_ptr->addend = ad - su->textsec->vma; \
2191 case N_DATA | N_EXT: \
2192 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2193 cache_ptr->addend = ad - su->datasec->vma; \
2196 case N_BSS | N_EXT: \
2197 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2198 cache_ptr->addend = ad - su->bsssec->vma; \
2202 case N_ABS | N_EXT: \
2203 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2204 cache_ptr->addend = ad; \
2210 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2212 struct reloc_ext_external *bytes;
2215 bfd_size_type symcount;
2217 unsigned int r_index;
2219 unsigned int r_type;
2220 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2222 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2224 /* now the fun stuff */
2225 if (bfd_header_big_endian (abfd)) {
2226 r_index = (bytes->r_index[0] << 16)
2227 | (bytes->r_index[1] << 8)
2228 | bytes->r_index[2];
2229 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2230 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2231 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2233 r_index = (bytes->r_index[2] << 16)
2234 | (bytes->r_index[1] << 8)
2235 | bytes->r_index[0];
2236 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2237 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2238 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2241 cache_ptr->howto = howto_table_ext + r_type;
2243 /* Base relative relocs are always against the symbol table,
2244 regardless of the setting of r_extern. r_extern just reflects
2245 whether the symbol the reloc is against is local or global. */
2246 if (r_type == RELOC_BASE10
2247 || r_type == RELOC_BASE13
2248 || r_type == RELOC_BASE22)
2251 if (r_extern && r_index > symcount)
2253 /* We could arrange to return an error, but it might be useful
2254 to see the file even if it is bad. */
2259 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2263 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2265 struct reloc_std_external *bytes;
2268 bfd_size_type symcount;
2270 unsigned int r_index;
2272 unsigned int r_length;
2274 int r_baserel, r_jmptable, r_relative;
2275 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2276 unsigned int howto_idx;
2278 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2280 /* now the fun stuff */
2281 if (bfd_header_big_endian (abfd)) {
2282 r_index = (bytes->r_index[0] << 16)
2283 | (bytes->r_index[1] << 8)
2284 | bytes->r_index[2];
2285 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2286 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2287 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2288 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2289 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2290 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2291 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2293 r_index = (bytes->r_index[2] << 16)
2294 | (bytes->r_index[1] << 8)
2295 | bytes->r_index[0];
2296 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2297 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2298 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2299 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2300 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2301 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2302 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2305 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2306 + 16 * r_jmptable + 32 * r_relative;
2307 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2308 cache_ptr->howto = howto_table_std + howto_idx;
2309 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2311 /* Base relative relocs are always against the symbol table,
2312 regardless of the setting of r_extern. r_extern just reflects
2313 whether the symbol the reloc is against is local or global. */
2317 if (r_extern && r_index > symcount)
2319 /* We could arrange to return an error, but it might be useful
2320 to see the file even if it is bad. */
2328 /* Read and swap the relocs for a section. */
2331 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2337 bfd_size_type reloc_size;
2339 arelent *reloc_cache;
2341 unsigned int counter = 0;
2344 if (asect->relocation)
2347 if (asect->flags & SEC_CONSTRUCTOR)
2350 if (asect == obj_datasec (abfd))
2351 reloc_size = exec_hdr(abfd)->a_drsize;
2352 else if (asect == obj_textsec (abfd))
2353 reloc_size = exec_hdr(abfd)->a_trsize;
2354 else if (asect == obj_bsssec (abfd))
2358 bfd_set_error (bfd_error_invalid_operation);
2362 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2365 each_size = obj_reloc_entry_size (abfd);
2367 count = reloc_size / each_size;
2369 reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent)));
2370 if (reloc_cache == NULL && count != 0)
2372 memset (reloc_cache, 0, count * sizeof (arelent));
2374 relocs = bfd_malloc ((size_t) reloc_size);
2375 if (relocs == NULL && reloc_size != 0)
2381 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2388 cache_ptr = reloc_cache;
2389 if (each_size == RELOC_EXT_SIZE)
2391 register struct reloc_ext_external *rptr =
2392 (struct reloc_ext_external *) relocs;
2394 for (; counter < count; counter++, rptr++, cache_ptr++)
2395 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2396 bfd_get_symcount (abfd));
2400 register struct reloc_std_external *rptr =
2401 (struct reloc_std_external *) relocs;
2403 for (; counter < count; counter++, rptr++, cache_ptr++)
2404 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2405 bfd_get_symcount (abfd));
2410 asect->relocation = reloc_cache;
2411 asect->reloc_count = cache_ptr - reloc_cache;
2416 /* Write out a relocation section into an object file. */
2419 NAME(aout,squirt_out_relocs) (abfd, section)
2424 unsigned char *native, *natptr;
2427 unsigned int count = section->reloc_count;
2430 if (count == 0 || section->orelocation == NULL)
2433 each_size = obj_reloc_entry_size (abfd);
2434 natsize = each_size * count;
2435 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2439 generic = section->orelocation;
2441 if (each_size == RELOC_EXT_SIZE)
2443 for (natptr = native;
2445 --count, natptr += each_size, ++generic)
2446 MY_swap_ext_reloc_out (abfd, *generic,
2447 (struct reloc_ext_external *) natptr);
2451 for (natptr = native;
2453 --count, natptr += each_size, ++generic)
2454 MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr);
2457 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
2458 bfd_release(abfd, native);
2461 bfd_release (abfd, native);
2466 /* This is stupid. This function should be a boolean predicate */
2468 NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2474 arelent *tblptr = section->relocation;
2477 if (section == obj_bsssec (abfd))
2483 if (!(tblptr || NAME(aout,slurp_reloc_table) (abfd, section, symbols)))
2486 if (section->flags & SEC_CONSTRUCTOR) {
2487 arelent_chain *chain = section->constructor_chain;
2488 for (count = 0; count < section->reloc_count; count ++) {
2489 *relptr ++ = &chain->relent;
2490 chain = chain->next;
2494 tblptr = section->relocation;
2496 for (count = 0; count++ < section->reloc_count;)
2498 *relptr++ = tblptr++;
2503 return section->reloc_count;
2507 NAME(aout,get_reloc_upper_bound) (abfd, asect)
2511 if (bfd_get_format (abfd) != bfd_object) {
2512 bfd_set_error (bfd_error_invalid_operation);
2515 if (asect->flags & SEC_CONSTRUCTOR) {
2516 return (sizeof (arelent *) * (asect->reloc_count+1));
2519 if (asect == obj_datasec (abfd))
2520 return (sizeof (arelent *)
2521 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
2524 if (asect == obj_textsec (abfd))
2525 return (sizeof (arelent *)
2526 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
2529 if (asect == obj_bsssec (abfd))
2530 return sizeof (arelent *);
2532 if (asect == obj_bsssec (abfd))
2535 bfd_set_error (bfd_error_invalid_operation);
2541 NAME(aout,get_symtab_upper_bound) (abfd)
2544 if (!NAME(aout,slurp_symbol_table) (abfd))
2547 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2551 NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
2552 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2553 asymbol *ignore_symbol ATTRIBUTE_UNUSED;
2555 return (alent *)NULL;
2559 NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
2560 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2564 bfd_symbol_info (symbol, ret);
2566 if (ret->type == '?')
2568 int type_code = aout_symbol(symbol)->type & 0xff;
2569 const char *stab_name = bfd_get_stab_name (type_code);
2570 static char buf[10];
2572 if (stab_name == NULL)
2574 sprintf (buf, "(%d)", type_code);
2578 ret->stab_type = type_code;
2579 ret->stab_other = (unsigned) (aout_symbol(symbol)->other & 0xff);
2580 ret->stab_desc = (unsigned) (aout_symbol(symbol)->desc & 0xffff);
2581 ret->stab_name = stab_name;
2586 NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
2587 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2590 bfd_print_symbol_type how;
2592 FILE *file = (FILE *)afile;
2595 case bfd_print_symbol_name:
2597 fprintf (file,"%s", symbol->name);
2599 case bfd_print_symbol_more:
2600 fprintf (file,"%4x %2x %2x",(unsigned) (aout_symbol(symbol)->desc & 0xffff),
2601 (unsigned) (aout_symbol(symbol)->other & 0xff),
2602 (unsigned) (aout_symbol(symbol)->type));
2604 case bfd_print_symbol_all:
2606 CONST char *section_name = symbol->section->name;
2608 bfd_print_symbol_vandf((PTR)file,symbol);
2610 fprintf (file," %-5s %04x %02x %02x",
2612 (unsigned) (aout_symbol(symbol)->desc & 0xffff),
2613 (unsigned) (aout_symbol(symbol)->other & 0xff),
2614 (unsigned) (aout_symbol(symbol)->type & 0xff));
2616 fprintf (file," %s", symbol->name);
2622 /* If we don't have to allocate more than 1MB to hold the generic
2623 symbols, we use the generic minisymbol methord: it's faster, since
2624 it only translates the symbols once, not multiple times. */
2625 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2627 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2628 symbols. The minisymbol_to_symbol function translates these into
2629 BFD asymbol structures. */
2632 NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2636 unsigned int *sizep;
2640 /* We could handle the dynamic symbols here as well, but it's
2641 easier to hand them off. */
2642 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2645 if (! aout_get_external_symbols (abfd))
2648 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2649 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2651 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2653 /* By passing the external symbols back from this routine, we are
2654 giving up control over the memory block. Clear
2655 obj_aout_external_syms, so that we do not try to free it
2657 obj_aout_external_syms (abfd) = NULL;
2659 *sizep = EXTERNAL_NLIST_SIZE;
2660 return obj_aout_external_sym_count (abfd);
2663 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2664 unmodified a.out symbol. The SYM argument is a structure returned
2665 by bfd_make_empty_symbol, which we fill in here. */
2668 NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2675 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2676 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2678 memset (sym, 0, sizeof (aout_symbol_type));
2680 /* We call translate_symbol_table to translate a single symbol. */
2681 if (! (NAME(aout,translate_symbol_table)
2683 (aout_symbol_type *) sym,
2684 (struct external_nlist *) minisym,
2686 obj_aout_external_strings (abfd),
2687 obj_aout_external_string_size (abfd),
2695 provided a BFD, a section and an offset into the section, calculate
2696 and return the name of the source file and the line nearest to the
2701 NAME(aout,find_nearest_line)
2702 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2707 CONST char **filename_ptr;
2708 CONST char **functionname_ptr;
2709 unsigned int *line_ptr;
2711 /* Run down the file looking for the filename, function and linenumber */
2713 CONST char *directory_name = NULL;
2714 CONST char *main_file_name = NULL;
2715 CONST char *current_file_name = NULL;
2716 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2717 CONST char *line_directory_name = NULL; /* Value of directory_name at line number. */
2718 bfd_vma low_line_vma = 0;
2719 bfd_vma low_func_vma = 0;
2721 size_t filelen, funclen;
2724 *filename_ptr = abfd->filename;
2725 *functionname_ptr = 0;
2727 if (symbols != (asymbol **)NULL) {
2728 for (p = symbols; *p; p++) {
2729 aout_symbol_type *q = (aout_symbol_type *) (*p);
2733 /* If this looks like a file name symbol, and it comes after
2734 the line number we have found so far, but before the
2735 offset, then we have probably not found the right line
2737 if (q->symbol.value <= offset
2738 && ((q->symbol.value > low_line_vma
2739 && (line_file_name != NULL
2741 || (q->symbol.value > low_func_vma
2744 const char *symname;
2746 symname = q->symbol.name;
2747 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2749 if (q->symbol.value > low_line_vma)
2752 line_file_name = NULL;
2754 if (q->symbol.value > low_func_vma)
2761 /* If this symbol is less than the offset, but greater than
2762 the line number we have found so far, then we have not
2763 found the right line number. */
2764 if (q->symbol.value <= offset)
2766 if (q->symbol.value > low_line_vma)
2769 line_file_name = NULL;
2771 if (q->symbol.value > low_func_vma)
2775 main_file_name = current_file_name = q->symbol.name;
2776 /* Look ahead to next symbol to check if that too is an N_SO. */
2780 q = (aout_symbol_type *) (*p);
2781 if (q->type != (int)N_SO)
2784 /* Found a second N_SO First is directory; second is filename. */
2785 directory_name = current_file_name;
2786 main_file_name = current_file_name = q->symbol.name;
2787 if (obj_textsec(abfd) != section)
2791 current_file_name = q->symbol.name;
2798 /* We'll keep this if it resolves nearer than the one we have
2800 if (q->symbol.value >= low_line_vma
2801 && q->symbol.value <= offset)
2803 *line_ptr = q->desc;
2804 low_line_vma = q->symbol.value;
2805 line_file_name = current_file_name;
2806 line_directory_name = directory_name;
2811 /* We'll keep this if it is nearer than the one we have already */
2812 if (q->symbol.value >= low_func_vma &&
2813 q->symbol.value <= offset) {
2814 low_func_vma = q->symbol.value;
2815 func = (asymbol *)q;
2817 else if (q->symbol.value > offset)
2828 main_file_name = line_file_name;
2829 directory_name = line_directory_name;
2832 if (main_file_name == NULL
2833 || IS_ABSOLUTE_PATH (main_file_name)
2834 || directory_name == NULL)
2837 filelen = strlen (directory_name) + strlen (main_file_name);
2841 funclen = strlen (bfd_asymbol_name (func));
2843 if (adata (abfd).line_buf != NULL)
2844 free (adata (abfd).line_buf);
2845 if (filelen + funclen == 0)
2846 adata (abfd).line_buf = buf = NULL;
2849 buf = (char *) bfd_malloc (filelen + funclen + 3);
2850 adata (abfd).line_buf = buf;
2855 if (main_file_name != NULL)
2857 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2858 *filename_ptr = main_file_name;
2861 sprintf (buf, "%s%s", directory_name, main_file_name);
2862 *filename_ptr = buf;
2869 const char *function = func->name;
2872 /* The caller expects a symbol name. We actually have a
2873 function name, without the leading underscore. Put the
2874 underscore back in, so that the caller gets a symbol name. */
2875 if (bfd_get_symbol_leading_char (abfd) == '\0')
2876 strcpy (buf, function);
2879 buf[0] = bfd_get_symbol_leading_char (abfd);
2880 strcpy (buf + 1, function);
2882 /* Have to remove : stuff */
2883 p = strchr (buf, ':');
2886 *functionname_ptr = buf;
2893 NAME(aout,sizeof_headers) (abfd, execable)
2895 boolean execable ATTRIBUTE_UNUSED;
2897 return adata(abfd).exec_bytes_size;
2900 /* Free all information we have cached for this BFD. We can always
2901 read it again later if we need it. */
2904 NAME(aout,bfd_free_cached_info) (abfd)
2909 if (bfd_get_format (abfd) != bfd_object)
2912 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2913 BFCI_FREE (obj_aout_symbols (abfd));
2915 obj_aout_external_syms (abfd) = 0;
2916 bfd_free_window (&obj_aout_sym_window (abfd));
2917 bfd_free_window (&obj_aout_string_window (abfd));
2918 obj_aout_external_strings (abfd) = 0;
2920 BFCI_FREE (obj_aout_external_syms (abfd));
2921 BFCI_FREE (obj_aout_external_strings (abfd));
2923 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2924 BFCI_FREE (o->relocation);
2930 /* a.out link code. */
2932 static boolean aout_link_add_object_symbols
2933 PARAMS ((bfd *, struct bfd_link_info *));
2934 static boolean aout_link_check_archive_element
2935 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2936 static boolean aout_link_free_symbols PARAMS ((bfd *));
2937 static boolean aout_link_check_ar_symbols
2938 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2939 static boolean aout_link_add_symbols
2940 PARAMS ((bfd *, struct bfd_link_info *));
2942 /* Routine to create an entry in an a.out link hash table. */
2944 struct bfd_hash_entry *
2945 NAME(aout,link_hash_newfunc) (entry, table, string)
2946 struct bfd_hash_entry *entry;
2947 struct bfd_hash_table *table;
2950 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2952 /* Allocate the structure if it has not already been allocated by a
2954 if (ret == (struct aout_link_hash_entry *) NULL)
2955 ret = ((struct aout_link_hash_entry *)
2956 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2957 if (ret == (struct aout_link_hash_entry *) NULL)
2958 return (struct bfd_hash_entry *) ret;
2960 /* Call the allocation method of the superclass. */
2961 ret = ((struct aout_link_hash_entry *)
2962 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2966 /* Set local fields. */
2967 ret->written = false;
2971 return (struct bfd_hash_entry *) ret;
2974 /* Initialize an a.out link hash table. */
2977 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2978 struct aout_link_hash_table *table;
2980 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2981 struct bfd_hash_table *,
2984 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2987 /* Create an a.out link hash table. */
2989 struct bfd_link_hash_table *
2990 NAME(aout,link_hash_table_create) (abfd)
2993 struct aout_link_hash_table *ret;
2995 ret = ((struct aout_link_hash_table *)
2996 bfd_alloc (abfd, sizeof (struct aout_link_hash_table)));
2998 return (struct bfd_link_hash_table *) NULL;
2999 if (! NAME(aout,link_hash_table_init) (ret, abfd,
3000 NAME(aout,link_hash_newfunc)))
3003 return (struct bfd_link_hash_table *) NULL;
3008 /* Given an a.out BFD, add symbols to the global hash table as
3012 NAME(aout,link_add_symbols) (abfd, info)
3014 struct bfd_link_info *info;
3016 switch (bfd_get_format (abfd))
3019 return aout_link_add_object_symbols (abfd, info);
3021 return _bfd_generic_link_add_archive_symbols
3022 (abfd, info, aout_link_check_archive_element);
3024 bfd_set_error (bfd_error_wrong_format);
3029 /* Add symbols from an a.out object file. */
3032 aout_link_add_object_symbols (abfd, info)
3034 struct bfd_link_info *info;
3036 if (! aout_get_external_symbols (abfd))
3038 if (! aout_link_add_symbols (abfd, info))
3040 if (! info->keep_memory)
3042 if (! aout_link_free_symbols (abfd))
3048 /* Check a single archive element to see if we need to include it in
3049 the link. *PNEEDED is set according to whether this element is
3050 needed in the link or not. This is called from
3051 _bfd_generic_link_add_archive_symbols. */
3054 aout_link_check_archive_element (abfd, info, pneeded)
3056 struct bfd_link_info *info;
3059 if (! aout_get_external_symbols (abfd))
3062 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3067 if (! aout_link_add_symbols (abfd, info))
3071 if (! info->keep_memory || ! *pneeded)
3073 if (! aout_link_free_symbols (abfd))
3080 /* Free up the internal symbols read from an a.out file. */
3083 aout_link_free_symbols (abfd)
3086 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
3089 bfd_free_window (&obj_aout_sym_window (abfd));
3091 free ((PTR) obj_aout_external_syms (abfd));
3093 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
3095 if (obj_aout_external_strings (abfd) != (char *) NULL)
3098 bfd_free_window (&obj_aout_string_window (abfd));
3100 free ((PTR) obj_aout_external_strings (abfd));
3102 obj_aout_external_strings (abfd) = (char *) NULL;
3107 /* Look through the internal symbols to see if this object file should
3108 be included in the link. We should include this object file if it
3109 defines any symbols which are currently undefined. If this object
3110 file defines a common symbol, then we may adjust the size of the
3111 known symbol but we do not include the object file in the link
3112 (unless there is some other reason to include it). */
3115 aout_link_check_ar_symbols (abfd, info, pneeded)
3117 struct bfd_link_info *info;
3120 register struct external_nlist *p;
3121 struct external_nlist *pend;
3126 /* Look through all the symbols. */
3127 p = obj_aout_external_syms (abfd);
3128 pend = p + obj_aout_external_sym_count (abfd);
3129 strings = obj_aout_external_strings (abfd);
3130 for (; p < pend; p++)
3132 int type = bfd_h_get_8 (abfd, p->e_type);
3134 struct bfd_link_hash_entry *h;
3136 /* Ignore symbols that are not externally visible. This is an
3137 optimization only, as we check the type more thoroughly
3139 if (((type & N_EXT) == 0
3140 || (type & N_STAB) != 0
3147 if (type == N_WARNING
3153 name = strings + GET_WORD (abfd, p->e_strx);
3154 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3156 /* We are only interested in symbols that are currently
3157 undefined or common. */
3158 if (h == (struct bfd_link_hash_entry *) NULL
3159 || (h->type != bfd_link_hash_undefined
3160 && h->type != bfd_link_hash_common))
3162 if (type == (N_INDR | N_EXT))
3167 if (type == (N_TEXT | N_EXT)
3168 || type == (N_DATA | N_EXT)
3169 || type == (N_BSS | N_EXT)
3170 || type == (N_ABS | N_EXT)
3171 || type == (N_INDR | N_EXT))
3173 /* This object file defines this symbol. We must link it
3174 in. This is true regardless of whether the current
3175 definition of the symbol is undefined or common. If the
3176 current definition is common, we have a case in which we
3177 have already seen an object file including
3179 and this object file from the archive includes
3181 In such a case we must include this object file.
3183 FIXME: The SunOS 4.1.3 linker will pull in the archive
3184 element if the symbol is defined in the .data section,
3185 but not if it is defined in the .text section. That
3186 seems a bit crazy to me, and I haven't implemented it.
3187 However, it might be correct. */
3188 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3194 if (type == (N_UNDF | N_EXT))
3198 value = GET_WORD (abfd, p->e_value);
3201 /* This symbol is common in the object from the archive
3203 if (h->type == bfd_link_hash_undefined)
3208 symbfd = h->u.undef.abfd;
3209 if (symbfd == (bfd *) NULL)
3211 /* This symbol was created as undefined from
3212 outside BFD. We assume that we should link
3213 in the object file. This is done for the -u
3214 option in the linker. */
3215 if (! (*info->callbacks->add_archive_element) (info,
3222 /* Turn the current link symbol into a common
3223 symbol. It is already on the undefs list. */
3224 h->type = bfd_link_hash_common;
3225 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3226 bfd_hash_allocate (&info->hash->table,
3227 sizeof (struct bfd_link_hash_common_entry)));
3228 if (h->u.c.p == NULL)
3231 h->u.c.size = value;
3233 /* FIXME: This isn't quite right. The maximum
3234 alignment of a common symbol should be set by the
3235 architecture of the output file, not of the input
3237 power = bfd_log2 (value);
3238 if (power > bfd_get_arch_info (abfd)->section_align_power)
3239 power = bfd_get_arch_info (abfd)->section_align_power;
3240 h->u.c.p->alignment_power = power;
3242 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3247 /* Adjust the size of the common symbol if
3249 if (value > h->u.c.size)
3250 h->u.c.size = value;
3260 /* This symbol is weak but defined. We must pull it in if
3261 the current link symbol is undefined, but we don't want
3262 it if the current link symbol is common. */
3263 if (h->type == bfd_link_hash_undefined)
3265 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3273 /* We do not need this object file. */
3277 /* Add all symbols from an object file to the hash table. */
3280 aout_link_add_symbols (abfd, info)
3282 struct bfd_link_info *info;
3284 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3285 const char *, flagword, asection *,
3286 bfd_vma, const char *, boolean,
3288 struct bfd_link_hash_entry **));
3289 struct external_nlist *syms;
3290 bfd_size_type sym_count;
3293 struct aout_link_hash_entry **sym_hash;
3294 register struct external_nlist *p;
3295 struct external_nlist *pend;
3297 syms = obj_aout_external_syms (abfd);
3298 sym_count = obj_aout_external_sym_count (abfd);
3299 strings = obj_aout_external_strings (abfd);
3300 if (info->keep_memory)
3305 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3307 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3308 (abfd, info, &syms, &sym_count, &strings)))
3312 /* We keep a list of the linker hash table entries that correspond
3313 to particular symbols. We could just look them up in the hash
3314 table, but keeping the list is more efficient. Perhaps this
3315 should be conditional on info->keep_memory. */
3316 sym_hash = ((struct aout_link_hash_entry **)
3319 * sizeof (struct aout_link_hash_entry *))));
3320 if (sym_hash == NULL && sym_count != 0)
3322 obj_aout_sym_hashes (abfd) = sym_hash;
3324 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3325 if (add_one_symbol == NULL)
3326 add_one_symbol = _bfd_generic_link_add_one_symbol;
3329 pend = p + sym_count;
3330 for (; p < pend; p++, sym_hash++)
3341 type = bfd_h_get_8 (abfd, p->e_type);
3343 /* Ignore debugging symbols. */
3344 if ((type & N_STAB) != 0)
3347 name = strings + GET_WORD (abfd, p->e_strx);
3348 value = GET_WORD (abfd, p->e_value);
3365 /* Ignore symbols that are not externally visible. */
3368 /* Ignore local indirect symbol. */
3373 case N_UNDF | N_EXT:
3376 section = bfd_und_section_ptr;
3380 section = bfd_com_section_ptr;
3383 section = bfd_abs_section_ptr;
3385 case N_TEXT | N_EXT:
3386 section = obj_textsec (abfd);
3387 value -= bfd_get_section_vma (abfd, section);
3389 case N_DATA | N_EXT:
3390 case N_SETV | N_EXT:
3391 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3392 translate_from_native_sym_flags. */
3393 section = obj_datasec (abfd);
3394 value -= bfd_get_section_vma (abfd, section);
3397 section = obj_bsssec (abfd);
3398 value -= bfd_get_section_vma (abfd, section);
3400 case N_INDR | N_EXT:
3401 /* An indirect symbol. The next symbol is the symbol
3402 which this one really is. */
3403 BFD_ASSERT (p + 1 < pend);
3405 string = strings + GET_WORD (abfd, p->e_strx);
3406 section = bfd_ind_section_ptr;
3407 flags |= BSF_INDIRECT;
3409 case N_COMM | N_EXT:
3410 section = bfd_com_section_ptr;
3412 case N_SETA: case N_SETA | N_EXT:
3413 section = bfd_abs_section_ptr;
3414 flags |= BSF_CONSTRUCTOR;
3416 case N_SETT: case N_SETT | N_EXT:
3417 section = obj_textsec (abfd);
3418 flags |= BSF_CONSTRUCTOR;
3419 value -= bfd_get_section_vma (abfd, section);
3421 case N_SETD: case N_SETD | N_EXT:
3422 section = obj_datasec (abfd);
3423 flags |= BSF_CONSTRUCTOR;
3424 value -= bfd_get_section_vma (abfd, section);
3426 case N_SETB: case N_SETB | N_EXT:
3427 section = obj_bsssec (abfd);
3428 flags |= BSF_CONSTRUCTOR;
3429 value -= bfd_get_section_vma (abfd, section);
3432 /* A warning symbol. The next symbol is the one to warn
3434 BFD_ASSERT (p + 1 < pend);
3437 name = strings + GET_WORD (abfd, p->e_strx);
3438 section = bfd_und_section_ptr;
3439 flags |= BSF_WARNING;
3442 section = bfd_und_section_ptr;
3446 section = bfd_abs_section_ptr;
3450 section = obj_textsec (abfd);
3451 value -= bfd_get_section_vma (abfd, section);
3455 section = obj_datasec (abfd);
3456 value -= bfd_get_section_vma (abfd, section);
3460 section = obj_bsssec (abfd);
3461 value -= bfd_get_section_vma (abfd, section);
3466 if (! ((*add_one_symbol)
3467 (info, abfd, name, flags, section, value, string, copy, false,
3468 (struct bfd_link_hash_entry **) sym_hash)))
3471 /* Restrict the maximum alignment of a common symbol based on
3472 the architecture, since a.out has no way to represent
3473 alignment requirements of a section in a .o file. FIXME:
3474 This isn't quite right: it should use the architecture of the
3475 output file, not the input files. */
3476 if ((*sym_hash)->root.type == bfd_link_hash_common
3477 && ((*sym_hash)->root.u.c.p->alignment_power >
3478 bfd_get_arch_info (abfd)->section_align_power))
3479 (*sym_hash)->root.u.c.p->alignment_power =
3480 bfd_get_arch_info (abfd)->section_align_power;
3482 /* If this is a set symbol, and we are not building sets, then
3483 it is possible for the hash entry to not have been set. In
3484 such a case, treat the symbol as not globally defined. */
3485 if ((*sym_hash)->root.type == bfd_link_hash_new)
3487 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3491 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3498 /* A hash table used for header files with N_BINCL entries. */
3500 struct aout_link_includes_table
3502 struct bfd_hash_table root;
3505 /* A linked list of totals that we have found for a particular header
3508 struct aout_link_includes_totals
3510 struct aout_link_includes_totals *next;
3514 /* An entry in the header file hash table. */
3516 struct aout_link_includes_entry
3518 struct bfd_hash_entry root;
3519 /* List of totals we have found for this file. */
3520 struct aout_link_includes_totals *totals;
3523 /* Look up an entry in an the header file hash table. */
3525 #define aout_link_includes_lookup(table, string, create, copy) \
3526 ((struct aout_link_includes_entry *) \
3527 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3529 /* During the final link step we need to pass around a bunch of
3530 information, so we do it in an instance of this structure. */
3532 struct aout_final_link_info
3534 /* General link information. */
3535 struct bfd_link_info *info;
3538 /* Reloc file positions. */
3539 file_ptr treloff, dreloff;
3540 /* File position of symbols. */
3543 struct bfd_strtab_hash *strtab;
3544 /* Header file hash table. */
3545 struct aout_link_includes_table includes;
3546 /* A buffer large enough to hold the contents of any section. */
3548 /* A buffer large enough to hold the relocs of any section. */
3550 /* A buffer large enough to hold the symbol map of any input BFD. */
3552 /* A buffer large enough to hold output symbols of any input BFD. */
3553 struct external_nlist *output_syms;
3556 static struct bfd_hash_entry *aout_link_includes_newfunc
3557 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
3558 static boolean aout_link_input_bfd
3559 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3560 static boolean aout_link_write_symbols
3561 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3562 static boolean aout_link_write_other_symbol
3563 PARAMS ((struct aout_link_hash_entry *, PTR));
3564 static boolean aout_link_input_section
3565 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3566 asection *input_section, file_ptr *reloff_ptr,
3567 bfd_size_type rel_size));
3568 static boolean aout_link_input_section_std
3569 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3570 asection *input_section, struct reloc_std_external *,
3571 bfd_size_type rel_size, bfd_byte *contents));
3572 static boolean aout_link_input_section_ext
3573 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3574 asection *input_section, struct reloc_ext_external *,
3575 bfd_size_type rel_size, bfd_byte *contents));
3576 static INLINE asection *aout_reloc_index_to_section
3577 PARAMS ((bfd *, int));
3578 static boolean aout_link_reloc_link_order
3579 PARAMS ((struct aout_final_link_info *, asection *,
3580 struct bfd_link_order *));
3582 /* The function to create a new entry in the header file hash table. */
3584 static struct bfd_hash_entry *
3585 aout_link_includes_newfunc (entry, table, string)
3586 struct bfd_hash_entry *entry;
3587 struct bfd_hash_table *table;
3590 struct aout_link_includes_entry *ret =
3591 (struct aout_link_includes_entry *) entry;
3593 /* Allocate the structure if it has not already been allocated by a
3595 if (ret == (struct aout_link_includes_entry *) NULL)
3596 ret = ((struct aout_link_includes_entry *)
3597 bfd_hash_allocate (table,
3598 sizeof (struct aout_link_includes_entry)));
3599 if (ret == (struct aout_link_includes_entry *) NULL)
3600 return (struct bfd_hash_entry *) ret;
3602 /* Call the allocation method of the superclass. */
3603 ret = ((struct aout_link_includes_entry *)
3604 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3607 /* Set local fields. */
3611 return (struct bfd_hash_entry *) ret;
3614 /* Do the final link step. This is called on the output BFD. The
3615 INFO structure should point to a list of BFDs linked through the
3616 link_next field which can be used to find each BFD which takes part
3617 in the output. Also, each section in ABFD should point to a list
3618 of bfd_link_order structures which list all the input sections for
3619 the output section. */
3622 NAME(aout,final_link) (abfd, info, callback)
3624 struct bfd_link_info *info;
3625 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3627 struct aout_final_link_info aout_info;
3628 boolean includes_hash_initialized = false;
3630 bfd_size_type trsize, drsize;
3631 size_t max_contents_size;
3632 size_t max_relocs_size;
3633 size_t max_sym_count;
3634 bfd_size_type text_size;
3636 register struct bfd_link_order *p;
3638 boolean have_link_order_relocs;
3641 abfd->flags |= DYNAMIC;
3643 aout_info.info = info;
3644 aout_info.output_bfd = abfd;
3645 aout_info.contents = NULL;
3646 aout_info.relocs = NULL;
3647 aout_info.symbol_map = NULL;
3648 aout_info.output_syms = NULL;
3650 if (! bfd_hash_table_init_n (&aout_info.includes.root,
3651 aout_link_includes_newfunc,
3654 includes_hash_initialized = true;
3656 /* Figure out the largest section size. Also, if generating
3657 relocateable output, count the relocs. */
3660 max_contents_size = 0;
3661 max_relocs_size = 0;
3663 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3667 if (info->relocateable)
3669 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3671 trsize += exec_hdr (sub)->a_trsize;
3672 drsize += exec_hdr (sub)->a_drsize;
3676 /* FIXME: We need to identify the .text and .data sections
3677 and call get_reloc_upper_bound and canonicalize_reloc to
3678 work out the number of relocs needed, and then multiply
3679 by the reloc size. */
3680 (*_bfd_error_handler)
3681 (_("%s: relocateable link from %s to %s not supported"),
3682 bfd_get_filename (abfd),
3683 sub->xvec->name, abfd->xvec->name);
3684 bfd_set_error (bfd_error_invalid_operation);
3689 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3691 sz = bfd_section_size (sub, obj_textsec (sub));
3692 if (sz > max_contents_size)
3693 max_contents_size = sz;
3694 sz = bfd_section_size (sub, obj_datasec (sub));
3695 if (sz > max_contents_size)
3696 max_contents_size = sz;
3698 sz = exec_hdr (sub)->a_trsize;
3699 if (sz > max_relocs_size)
3700 max_relocs_size = sz;
3701 sz = exec_hdr (sub)->a_drsize;
3702 if (sz > max_relocs_size)
3703 max_relocs_size = sz;
3705 sz = obj_aout_external_sym_count (sub);
3706 if (sz > max_sym_count)
3711 if (info->relocateable)
3713 if (obj_textsec (abfd) != (asection *) NULL)
3714 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3716 * obj_reloc_entry_size (abfd));
3717 if (obj_datasec (abfd) != (asection *) NULL)
3718 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3720 * obj_reloc_entry_size (abfd));
3723 exec_hdr (abfd)->a_trsize = trsize;
3724 exec_hdr (abfd)->a_drsize = drsize;
3726 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3728 /* Adjust the section sizes and vmas according to the magic number.
3729 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3730 filepos for each section. */
3731 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3734 /* The relocation and symbol file positions differ among a.out
3735 targets. We are passed a callback routine from the backend
3736 specific code to handle this.
3737 FIXME: At this point we do not know how much space the symbol
3738 table will require. This will not work for any (nonstandard)
3739 a.out target that needs to know the symbol table size before it
3740 can compute the relocation file positions. This may or may not
3741 be the case for the hp300hpux target, for example. */
3742 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3744 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3745 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3746 obj_sym_filepos (abfd) = aout_info.symoff;
3748 /* We keep a count of the symbols as we output them. */
3749 obj_aout_external_sym_count (abfd) = 0;
3751 /* We accumulate the string table as we write out the symbols. */
3752 aout_info.strtab = _bfd_stringtab_init ();
3753 if (aout_info.strtab == NULL)
3756 /* Allocate buffers to hold section contents and relocs. */
3757 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3758 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3759 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3760 aout_info.output_syms = ((struct external_nlist *)
3761 bfd_malloc ((max_sym_count + 1)
3762 * sizeof (struct external_nlist)));
3763 if ((aout_info.contents == NULL && max_contents_size != 0)
3764 || (aout_info.relocs == NULL && max_relocs_size != 0)
3765 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3766 || aout_info.output_syms == NULL)
3769 /* If we have a symbol named __DYNAMIC, force it out now. This is
3770 required by SunOS. Doing this here rather than in sunos.c is a
3771 hack, but it's easier than exporting everything which would be
3774 struct aout_link_hash_entry *h;
3776 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3777 false, false, false);
3779 aout_link_write_other_symbol (h, &aout_info);
3782 /* The most time efficient way to do the link would be to read all
3783 the input object files into memory and then sort out the
3784 information into the output file. Unfortunately, that will
3785 probably use too much memory. Another method would be to step
3786 through everything that composes the text section and write it
3787 out, and then everything that composes the data section and write
3788 it out, and then write out the relocs, and then write out the
3789 symbols. Unfortunately, that requires reading stuff from each
3790 input file several times, and we will not be able to keep all the
3791 input files open simultaneously, and reopening them will be slow.
3793 What we do is basically process one input file at a time. We do
3794 everything we need to do with an input file once--copy over the
3795 section contents, handle the relocation information, and write
3796 out the symbols--and then we throw away the information we read
3797 from it. This approach requires a lot of lseeks of the output
3798 file, which is unfortunate but still faster than reopening a lot
3801 We use the output_has_begun field of the input BFDs to see
3802 whether we have already handled it. */
3803 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3804 sub->output_has_begun = false;
3806 /* Mark all sections which are to be included in the link. This
3807 will normally be every section. We need to do this so that we
3808 can identify any sections which the linker has decided to not
3810 for (o = abfd->sections; o != NULL; o = o->next)
3812 for (p = o->link_order_head; p != NULL; p = p->next)
3814 if (p->type == bfd_indirect_link_order)
3815 p->u.indirect.section->linker_mark = true;
3819 have_link_order_relocs = false;
3820 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3822 for (p = o->link_order_head;
3823 p != (struct bfd_link_order *) NULL;
3826 if (p->type == bfd_indirect_link_order
3827 && (bfd_get_flavour (p->u.indirect.section->owner)
3828 == bfd_target_aout_flavour))
3832 input_bfd = p->u.indirect.section->owner;
3833 if (! input_bfd->output_has_begun)
3835 if (! aout_link_input_bfd (&aout_info, input_bfd))
3837 input_bfd->output_has_begun = true;
3840 else if (p->type == bfd_section_reloc_link_order
3841 || p->type == bfd_symbol_reloc_link_order)
3843 /* These are handled below. */
3844 have_link_order_relocs = true;
3848 if (! _bfd_default_link_order (abfd, info, o, p))
3854 /* Write out any symbols that we have not already written out. */
3855 aout_link_hash_traverse (aout_hash_table (info),
3856 aout_link_write_other_symbol,
3859 /* Now handle any relocs we were asked to create by the linker.
3860 These did not come from any input file. We must do these after
3861 we have written out all the symbols, so that we know the symbol
3863 if (have_link_order_relocs)
3865 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3867 for (p = o->link_order_head;
3868 p != (struct bfd_link_order *) NULL;
3871 if (p->type == bfd_section_reloc_link_order
3872 || p->type == bfd_symbol_reloc_link_order)
3874 if (! aout_link_reloc_link_order (&aout_info, o, p))
3881 if (aout_info.contents != NULL)
3883 free (aout_info.contents);
3884 aout_info.contents = NULL;
3886 if (aout_info.relocs != NULL)
3888 free (aout_info.relocs);
3889 aout_info.relocs = NULL;
3891 if (aout_info.symbol_map != NULL)
3893 free (aout_info.symbol_map);
3894 aout_info.symbol_map = NULL;
3896 if (aout_info.output_syms != NULL)
3898 free (aout_info.output_syms);
3899 aout_info.output_syms = NULL;
3901 if (includes_hash_initialized)
3903 bfd_hash_table_free (&aout_info.includes.root);
3904 includes_hash_initialized = false;
3907 /* Finish up any dynamic linking we may be doing. */
3908 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3910 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3914 /* Update the header information. */
3915 abfd->symcount = obj_aout_external_sym_count (abfd);
3916 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3917 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3918 obj_textsec (abfd)->reloc_count =
3919 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3920 obj_datasec (abfd)->reloc_count =
3921 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3923 /* Write out the string table, unless there are no symbols. */
3924 if (abfd->symcount > 0)
3926 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
3927 || ! emit_stringtab (abfd, aout_info.strtab))
3930 else if (obj_textsec (abfd)->reloc_count == 0
3931 && obj_datasec (abfd)->reloc_count == 0)
3937 (obj_datasec (abfd)->filepos
3938 + exec_hdr (abfd)->a_data
3941 || bfd_write (&b, 1, 1, abfd) != 1)
3948 if (aout_info.contents != NULL)
3949 free (aout_info.contents);
3950 if (aout_info.relocs != NULL)
3951 free (aout_info.relocs);
3952 if (aout_info.symbol_map != NULL)
3953 free (aout_info.symbol_map);
3954 if (aout_info.output_syms != NULL)
3955 free (aout_info.output_syms);
3956 if (includes_hash_initialized)
3957 bfd_hash_table_free (&aout_info.includes.root);
3961 /* Link an a.out input BFD into the output file. */
3964 aout_link_input_bfd (finfo, input_bfd)
3965 struct aout_final_link_info *finfo;
3968 bfd_size_type sym_count;
3970 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3972 /* If this is a dynamic object, it may need special handling. */
3973 if ((input_bfd->flags & DYNAMIC) != 0
3974 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3976 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3977 (finfo->info, input_bfd));
3980 /* Get the symbols. We probably have them already, unless
3981 finfo->info->keep_memory is false. */
3982 if (! aout_get_external_symbols (input_bfd))
3985 sym_count = obj_aout_external_sym_count (input_bfd);
3987 /* Write out the symbols and get a map of the new indices. The map
3988 is placed into finfo->symbol_map. */
3989 if (! aout_link_write_symbols (finfo, input_bfd))
3992 /* Relocate and write out the sections. These functions use the
3993 symbol map created by aout_link_write_symbols. The linker_mark
3994 field will be set if these sections are to be included in the
3995 link, which will normally be the case. */
3996 if (obj_textsec (input_bfd)->linker_mark)
3998 if (! aout_link_input_section (finfo, input_bfd,
3999 obj_textsec (input_bfd),
4001 exec_hdr (input_bfd)->a_trsize))
4004 if (obj_datasec (input_bfd)->linker_mark)
4006 if (! aout_link_input_section (finfo, input_bfd,
4007 obj_datasec (input_bfd),
4009 exec_hdr (input_bfd)->a_drsize))
4013 /* If we are not keeping memory, we don't need the symbols any
4014 longer. We still need them if we are keeping memory, because the
4015 strings in the hash table point into them. */
4016 if (! finfo->info->keep_memory)
4018 if (! aout_link_free_symbols (input_bfd))
4025 /* Adjust and write out the symbols for an a.out file. Set the new
4026 symbol indices into a symbol_map. */
4029 aout_link_write_symbols (finfo, input_bfd)
4030 struct aout_final_link_info *finfo;
4034 bfd_size_type sym_count;
4036 enum bfd_link_strip strip;
4037 enum bfd_link_discard discard;
4038 struct external_nlist *outsym;
4039 bfd_size_type strtab_index;
4040 register struct external_nlist *sym;
4041 struct external_nlist *sym_end;
4042 struct aout_link_hash_entry **sym_hash;
4047 output_bfd = finfo->output_bfd;
4048 sym_count = obj_aout_external_sym_count (input_bfd);
4049 strings = obj_aout_external_strings (input_bfd);
4050 strip = finfo->info->strip;
4051 discard = finfo->info->discard;
4052 outsym = finfo->output_syms;
4054 /* First write out a symbol for this object file, unless we are
4055 discarding such symbols. */
4056 if (strip != strip_all
4057 && (strip != strip_some
4058 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4059 false, false) != NULL)
4060 && discard != discard_all)
4062 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
4063 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
4064 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
4065 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4066 input_bfd->filename, false);
4067 if (strtab_index == (bfd_size_type) -1)
4069 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4070 PUT_WORD (output_bfd,
4071 (bfd_get_section_vma (output_bfd,
4072 obj_textsec (input_bfd)->output_section)
4073 + obj_textsec (input_bfd)->output_offset),
4075 ++obj_aout_external_sym_count (output_bfd);
4081 sym = obj_aout_external_syms (input_bfd);
4082 sym_end = sym + sym_count;
4083 sym_hash = obj_aout_sym_hashes (input_bfd);
4084 symbol_map = finfo->symbol_map;
4085 memset (symbol_map, 0, sym_count * sizeof *symbol_map);
4086 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4090 struct aout_link_hash_entry *h;
4096 /* We set *symbol_map to 0 above for all symbols. If it has
4097 already been set to -1 for this symbol, it means that we are
4098 discarding it because it appears in a duplicate header file.
4099 See the N_BINCL code below. */
4100 if (*symbol_map == -1)
4103 /* Initialize *symbol_map to -1, which means that the symbol was
4104 not copied into the output file. We will change it later if
4105 we do copy the symbol over. */
4108 type = bfd_h_get_8 (input_bfd, sym->e_type);
4109 name = strings + GET_WORD (input_bfd, sym->e_strx);
4115 /* Pass this symbol through. It is the target of an
4116 indirect or warning symbol. */
4117 val = GET_WORD (input_bfd, sym->e_value);
4122 /* Skip this symbol, which is the target of an indirect
4123 symbol that we have changed to no longer be an indirect
4130 struct aout_link_hash_entry *hresolve;
4132 /* We have saved the hash table entry for this symbol, if
4133 there is one. Note that we could just look it up again
4134 in the hash table, provided we first check that it is an
4138 /* Use the name from the hash table, in case the symbol was
4141 name = h->root.root.string;
4143 /* If this is an indirect or warning symbol, then change
4144 hresolve to the base symbol. We also change *sym_hash so
4145 that the relocation routines relocate against the real
4148 if (h != (struct aout_link_hash_entry *) NULL
4149 && (h->root.type == bfd_link_hash_indirect
4150 || h->root.type == bfd_link_hash_warning))
4152 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4153 while (hresolve->root.type == bfd_link_hash_indirect
4154 || hresolve->root.type == bfd_link_hash_warning)
4155 hresolve = ((struct aout_link_hash_entry *)
4156 hresolve->root.u.i.link);
4157 *sym_hash = hresolve;
4160 /* If the symbol has already been written out, skip it. */
4161 if (h != (struct aout_link_hash_entry *) NULL
4162 && h->root.type != bfd_link_hash_warning
4165 if ((type & N_TYPE) == N_INDR
4166 || type == N_WARNING)
4168 *symbol_map = h->indx;
4172 /* See if we are stripping this symbol. */
4178 case strip_debugger:
4179 if ((type & N_STAB) != 0)
4183 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
4193 if (h != (struct aout_link_hash_entry *) NULL)
4198 /* Get the value of the symbol. */
4199 if ((type & N_TYPE) == N_TEXT
4201 symsec = obj_textsec (input_bfd);
4202 else if ((type & N_TYPE) == N_DATA
4204 symsec = obj_datasec (input_bfd);
4205 else if ((type & N_TYPE) == N_BSS
4207 symsec = obj_bsssec (input_bfd);
4208 else if ((type & N_TYPE) == N_ABS
4210 symsec = bfd_abs_section_ptr;
4211 else if (((type & N_TYPE) == N_INDR
4212 && (hresolve == (struct aout_link_hash_entry *) NULL
4213 || (hresolve->root.type != bfd_link_hash_defined
4214 && hresolve->root.type != bfd_link_hash_defweak
4215 && hresolve->root.type != bfd_link_hash_common)))
4216 || type == N_WARNING)
4218 /* Pass the next symbol through unchanged. The
4219 condition above for indirect symbols is so that if
4220 the indirect symbol was defined, we output it with
4221 the correct definition so the debugger will
4224 val = GET_WORD (input_bfd, sym->e_value);
4227 else if ((type & N_STAB) != 0)
4229 val = GET_WORD (input_bfd, sym->e_value);
4234 /* If we get here with an indirect symbol, it means that
4235 we are outputting it with a real definition. In such
4236 a case we do not want to output the next symbol,
4237 which is the target of the indirection. */
4238 if ((type & N_TYPE) == N_INDR)
4243 /* We need to get the value from the hash table. We use
4244 hresolve so that if we have defined an indirect
4245 symbol we output the final definition. */
4246 if (h == (struct aout_link_hash_entry *) NULL)
4248 switch (type & N_TYPE)
4251 symsec = obj_textsec (input_bfd);
4254 symsec = obj_datasec (input_bfd);
4257 symsec = obj_bsssec (input_bfd);
4260 symsec = bfd_abs_section_ptr;
4267 else if (hresolve->root.type == bfd_link_hash_defined
4268 || hresolve->root.type == bfd_link_hash_defweak)
4270 asection *input_section;
4271 asection *output_section;
4273 /* This case usually means a common symbol which was
4274 turned into a defined symbol. */
4275 input_section = hresolve->root.u.def.section;
4276 output_section = input_section->output_section;
4277 BFD_ASSERT (bfd_is_abs_section (output_section)
4278 || output_section->owner == output_bfd);
4279 val = (hresolve->root.u.def.value
4280 + bfd_get_section_vma (output_bfd, output_section)
4281 + input_section->output_offset);
4283 /* Get the correct type based on the section. If
4284 this is a constructed set, force it to be
4285 globally visible. */
4294 if (output_section == obj_textsec (output_bfd))
4295 type |= (hresolve->root.type == bfd_link_hash_defined
4298 else if (output_section == obj_datasec (output_bfd))
4299 type |= (hresolve->root.type == bfd_link_hash_defined
4302 else if (output_section == obj_bsssec (output_bfd))
4303 type |= (hresolve->root.type == bfd_link_hash_defined
4307 type |= (hresolve->root.type == bfd_link_hash_defined
4311 else if (hresolve->root.type == bfd_link_hash_common)
4312 val = hresolve->root.u.c.size;
4313 else if (hresolve->root.type == bfd_link_hash_undefweak)
4321 if (symsec != (asection *) NULL)
4322 val = (symsec->output_section->vma
4323 + symsec->output_offset
4324 + (GET_WORD (input_bfd, sym->e_value)
4327 /* If this is a global symbol set the written flag, and if
4328 it is a local symbol see if we should discard it. */
4329 if (h != (struct aout_link_hash_entry *) NULL)
4332 h->indx = obj_aout_external_sym_count (output_bfd);
4334 else if ((type & N_TYPE) != N_SETT
4335 && (type & N_TYPE) != N_SETD
4336 && (type & N_TYPE) != N_SETB
4337 && (type & N_TYPE) != N_SETA)
4344 if ((type & N_STAB) == 0
4345 && bfd_is_local_label_name (input_bfd, name))
4359 /* An N_BINCL symbol indicates the start of the stabs
4360 entries for a header file. We need to scan ahead to the
4361 next N_EINCL symbol, ignoring nesting, adding up all the
4362 characters in the symbol names, not including the file
4363 numbers in types (the first number after an open
4365 if (type == N_BINCL)
4367 struct external_nlist *incl_sym;
4369 struct aout_link_includes_entry *incl_entry;
4370 struct aout_link_includes_totals *t;
4374 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
4378 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4379 if (incl_type == N_EINCL)
4385 else if (incl_type == N_BINCL)
4391 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
4392 for (; *s != '\0'; s++)
4397 /* Skip the file number. */
4399 while (isdigit ((unsigned char) *s))
4407 /* If we have already included a header file with the
4408 same value, then replace this one with an N_EXCL
4410 copy = ! finfo->info->keep_memory;
4411 incl_entry = aout_link_includes_lookup (&finfo->includes,
4413 if (incl_entry == NULL)
4415 for (t = incl_entry->totals; t != NULL; t = t->next)
4416 if (t->total == val)
4420 /* This is the first time we have seen this header
4421 file with this set of stabs strings. */
4422 t = ((struct aout_link_includes_totals *)
4423 bfd_hash_allocate (&finfo->includes.root,
4428 t->next = incl_entry->totals;
4429 incl_entry->totals = t;
4435 /* This is a duplicate header file. We must change
4436 it to be an N_EXCL entry, and mark all the
4437 included symbols to prevent outputting them. */
4441 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
4443 incl_sym++, incl_map++)
4447 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4448 if (incl_type == N_EINCL)
4457 else if (incl_type == N_BINCL)
4466 /* Copy this symbol into the list of symbols we are going to
4468 bfd_h_put_8 (output_bfd, type, outsym->e_type);
4469 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
4471 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
4474 if (! finfo->info->keep_memory)
4476 /* name points into a string table which we are going to
4477 free. If there is a hash table entry, use that string.
4478 Otherwise, copy name into memory. */
4479 if (h != (struct aout_link_hash_entry *) NULL)
4480 name = h->root.root.string;
4484 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4486 if (strtab_index == (bfd_size_type) -1)
4488 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4489 PUT_WORD (output_bfd, val, outsym->e_value);
4490 *symbol_map = obj_aout_external_sym_count (output_bfd);
4491 ++obj_aout_external_sym_count (output_bfd);
4495 /* Write out the output symbols we have just constructed. */
4496 if (outsym > finfo->output_syms)
4498 bfd_size_type outsym_count;
4500 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4502 outsym_count = outsym - finfo->output_syms;
4503 if (bfd_write ((PTR) finfo->output_syms,
4504 (bfd_size_type) EXTERNAL_NLIST_SIZE,
4505 (bfd_size_type) outsym_count, output_bfd)
4506 != outsym_count * EXTERNAL_NLIST_SIZE)
4508 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
4514 /* Write out a symbol that was not associated with an a.out input
4518 aout_link_write_other_symbol (h, data)
4519 struct aout_link_hash_entry *h;
4522 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4526 struct external_nlist outsym;
4529 output_bfd = finfo->output_bfd;
4531 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4533 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4534 (output_bfd, finfo->info, h)))
4536 /* FIXME: No way to handle errors. */
4546 /* An indx of -2 means the symbol must be written. */
4548 && (finfo->info->strip == strip_all
4549 || (finfo->info->strip == strip_some
4550 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4551 false, false) == NULL)))
4554 switch (h->root.type)
4558 /* Avoid variable not initialized warnings. */
4560 case bfd_link_hash_new:
4561 /* This can happen for set symbols when sets are not being
4564 case bfd_link_hash_undefined:
4565 type = N_UNDF | N_EXT;
4568 case bfd_link_hash_defined:
4569 case bfd_link_hash_defweak:
4573 sec = h->root.u.def.section->output_section;
4574 BFD_ASSERT (bfd_is_abs_section (sec)
4575 || sec->owner == output_bfd);
4576 if (sec == obj_textsec (output_bfd))
4577 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4578 else if (sec == obj_datasec (output_bfd))
4579 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4580 else if (sec == obj_bsssec (output_bfd))
4581 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4583 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4585 val = (h->root.u.def.value
4587 + h->root.u.def.section->output_offset);
4590 case bfd_link_hash_common:
4591 type = N_UNDF | N_EXT;
4592 val = h->root.u.c.size;
4594 case bfd_link_hash_undefweak:
4597 case bfd_link_hash_indirect:
4598 case bfd_link_hash_warning:
4599 /* FIXME: Ignore these for now. The circumstances under which
4600 they should be written out are not clear to me. */
4604 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4605 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4606 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4607 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4609 if (indx == (bfd_size_type) -1)
4611 /* FIXME: No way to handle errors. */
4614 PUT_WORD (output_bfd, indx, outsym.e_strx);
4615 PUT_WORD (output_bfd, val, outsym.e_value);
4617 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4618 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4619 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4621 /* FIXME: No way to handle errors. */
4625 finfo->symoff += EXTERNAL_NLIST_SIZE;
4626 h->indx = obj_aout_external_sym_count (output_bfd);
4627 ++obj_aout_external_sym_count (output_bfd);
4632 /* Link an a.out section into the output file. */
4635 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4637 struct aout_final_link_info *finfo;
4639 asection *input_section;
4640 file_ptr *reloff_ptr;
4641 bfd_size_type rel_size;
4643 bfd_size_type input_size;
4646 /* Get the section contents. */
4647 input_size = bfd_section_size (input_bfd, input_section);
4648 if (! bfd_get_section_contents (input_bfd, input_section,
4649 (PTR) finfo->contents,
4650 (file_ptr) 0, input_size))
4653 /* Read in the relocs if we haven't already done it. */
4654 if (aout_section_data (input_section) != NULL
4655 && aout_section_data (input_section)->relocs != NULL)
4656 relocs = aout_section_data (input_section)->relocs;
4659 relocs = finfo->relocs;
4662 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4663 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4668 /* Relocate the section contents. */
4669 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4671 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4672 (struct reloc_std_external *) relocs,
4673 rel_size, finfo->contents))
4678 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4679 (struct reloc_ext_external *) relocs,
4680 rel_size, finfo->contents))
4684 /* Write out the section contents. */
4685 if (! bfd_set_section_contents (finfo->output_bfd,
4686 input_section->output_section,
4687 (PTR) finfo->contents,
4688 input_section->output_offset,
4692 /* If we are producing relocateable output, the relocs were
4693 modified, and we now write them out. */
4694 if (finfo->info->relocateable && rel_size > 0)
4696 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4698 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4701 *reloff_ptr += rel_size;
4703 /* Assert that the relocs have not run into the symbols, and
4704 that if these are the text relocs they have not run into the
4706 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4707 && (reloff_ptr != &finfo->treloff
4709 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4715 /* Get the section corresponding to a reloc index. */
4717 static INLINE asection *
4718 aout_reloc_index_to_section (abfd, indx)
4722 switch (indx & N_TYPE)
4725 return obj_textsec (abfd);
4727 return obj_datasec (abfd);
4729 return obj_bsssec (abfd);
4732 return bfd_abs_section_ptr;
4740 /* Relocate an a.out section using standard a.out relocs. */
4743 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4745 struct aout_final_link_info *finfo;
4747 asection *input_section;
4748 struct reloc_std_external *relocs;
4749 bfd_size_type rel_size;
4752 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4754 struct aout_link_hash_entry *,
4755 PTR, bfd_byte *, boolean *,
4758 boolean relocateable;
4759 struct external_nlist *syms;
4761 struct aout_link_hash_entry **sym_hashes;
4763 bfd_size_type reloc_count;
4764 register struct reloc_std_external *rel;
4765 struct reloc_std_external *rel_end;
4767 output_bfd = finfo->output_bfd;
4768 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4770 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4771 BFD_ASSERT (input_bfd->xvec->header_byteorder
4772 == output_bfd->xvec->header_byteorder);
4774 relocateable = finfo->info->relocateable;
4775 syms = obj_aout_external_syms (input_bfd);
4776 strings = obj_aout_external_strings (input_bfd);
4777 sym_hashes = obj_aout_sym_hashes (input_bfd);
4778 symbol_map = finfo->symbol_map;
4780 reloc_count = rel_size / RELOC_STD_SIZE;
4782 rel_end = rel + reloc_count;
4783 for (; rel < rel_end; rel++)
4790 reloc_howto_type *howto;
4791 struct aout_link_hash_entry *h = NULL;
4793 bfd_reloc_status_type r;
4795 r_addr = GET_SWORD (input_bfd, rel->r_address);
4797 #ifdef MY_reloc_howto
4798 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel);
4804 unsigned int howto_idx;
4806 if (bfd_header_big_endian (input_bfd))
4808 r_index = ((rel->r_index[0] << 16)
4809 | (rel->r_index[1] << 8)
4811 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4812 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4813 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4814 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4815 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4816 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4817 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4821 r_index = ((rel->r_index[2] << 16)
4822 | (rel->r_index[1] << 8)
4824 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4825 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4826 r_baserel = (0 != (rel->r_type[0]
4827 & RELOC_STD_BITS_BASEREL_LITTLE));
4828 r_jmptable= (0 != (rel->r_type[0]
4829 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4830 r_relative= (0 != (rel->r_type[0]
4831 & RELOC_STD_BITS_RELATIVE_LITTLE));
4832 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4833 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4836 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4837 + 16 * r_jmptable + 32 * r_relative);
4838 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4839 howto = howto_table_std + howto_idx;
4845 /* We are generating a relocateable output file, and must
4846 modify the reloc accordingly. */
4849 /* If we know the symbol this relocation is against,
4850 convert it into a relocation against a section. This
4851 is what the native linker does. */
4852 h = sym_hashes[r_index];
4853 if (h != (struct aout_link_hash_entry *) NULL
4854 && (h->root.type == bfd_link_hash_defined
4855 || h->root.type == bfd_link_hash_defweak))
4857 asection *output_section;
4859 /* Change the r_extern value. */
4860 if (bfd_header_big_endian (output_bfd))
4861 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4863 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4865 /* Compute a new r_index. */
4866 output_section = h->root.u.def.section->output_section;
4867 if (output_section == obj_textsec (output_bfd))
4869 else if (output_section == obj_datasec (output_bfd))
4871 else if (output_section == obj_bsssec (output_bfd))
4876 /* Add the symbol value and the section VMA to the
4877 addend stored in the contents. */
4878 relocation = (h->root.u.def.value
4879 + output_section->vma
4880 + h->root.u.def.section->output_offset);
4884 /* We must change r_index according to the symbol
4886 r_index = symbol_map[r_index];
4892 /* We decided to strip this symbol, but it
4893 turns out that we can't. Note that we
4894 lose the other and desc information here.
4895 I don't think that will ever matter for a
4901 if (! aout_link_write_other_symbol (h,
4911 name = strings + GET_WORD (input_bfd,
4912 syms[r_index].e_strx);
4913 if (! ((*finfo->info->callbacks->unattached_reloc)
4914 (finfo->info, name, input_bfd, input_section,
4924 /* Write out the new r_index value. */
4925 if (bfd_header_big_endian (output_bfd))
4927 rel->r_index[0] = r_index >> 16;
4928 rel->r_index[1] = r_index >> 8;
4929 rel->r_index[2] = r_index;
4933 rel->r_index[2] = r_index >> 16;
4934 rel->r_index[1] = r_index >> 8;
4935 rel->r_index[0] = r_index;
4942 /* This is a relocation against a section. We must
4943 adjust by the amount that the section moved. */
4944 section = aout_reloc_index_to_section (input_bfd, r_index);
4945 relocation = (section->output_section->vma
4946 + section->output_offset
4950 /* Change the address of the relocation. */
4951 PUT_WORD (output_bfd,
4952 r_addr + input_section->output_offset,
4955 /* Adjust a PC relative relocation by removing the reference
4956 to the original address in the section and including the
4957 reference to the new address. */
4959 relocation -= (input_section->output_section->vma
4960 + input_section->output_offset
4961 - input_section->vma);
4963 #ifdef MY_relocatable_reloc
4964 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4967 if (relocation == 0)
4970 r = MY_relocate_contents (howto,
4971 input_bfd, relocation,
4978 /* We are generating an executable, and must do a full
4984 h = sym_hashes[r_index];
4986 if (h != (struct aout_link_hash_entry *) NULL
4987 && (h->root.type == bfd_link_hash_defined
4988 || h->root.type == bfd_link_hash_defweak))
4990 relocation = (h->root.u.def.value
4991 + h->root.u.def.section->output_section->vma
4992 + h->root.u.def.section->output_offset);
4994 else if (h != (struct aout_link_hash_entry *) NULL
4995 && h->root.type == bfd_link_hash_undefweak)
5007 section = aout_reloc_index_to_section (input_bfd, r_index);
5008 relocation = (section->output_section->vma
5009 + section->output_offset
5012 relocation += input_section->vma;
5015 if (check_dynamic_reloc != NULL)
5019 if (! ((*check_dynamic_reloc)
5020 (finfo->info, input_bfd, input_section, h,
5021 (PTR) rel, contents, &skip, &relocation)))
5027 /* Now warn if a global symbol is undefined. We could not
5028 do this earlier, because check_dynamic_reloc might want
5029 to skip this reloc. */
5030 if (hundef && ! finfo->info->shared && ! r_baserel)
5035 name = h->root.root.string;
5037 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5038 if (! ((*finfo->info->callbacks->undefined_symbol)
5039 (finfo->info, name, input_bfd, input_section,
5044 r = MY_final_link_relocate (howto,
5045 input_bfd, input_section,
5046 contents, r_addr, relocation,
5050 if (r != bfd_reloc_ok)
5055 case bfd_reloc_outofrange:
5057 case bfd_reloc_overflow:
5062 name = h->root.root.string;
5064 name = strings + GET_WORD (input_bfd,
5065 syms[r_index].e_strx);
5070 s = aout_reloc_index_to_section (input_bfd, r_index);
5071 name = bfd_section_name (input_bfd, s);
5073 if (! ((*finfo->info->callbacks->reloc_overflow)
5074 (finfo->info, name, howto->name,
5075 (bfd_vma) 0, input_bfd, input_section, r_addr)))
5086 /* Relocate an a.out section using extended a.out relocs. */
5089 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
5091 struct aout_final_link_info *finfo;
5093 asection *input_section;
5094 struct reloc_ext_external *relocs;
5095 bfd_size_type rel_size;
5098 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
5100 struct aout_link_hash_entry *,
5101 PTR, bfd_byte *, boolean *,
5104 boolean relocateable;
5105 struct external_nlist *syms;
5107 struct aout_link_hash_entry **sym_hashes;
5109 bfd_size_type reloc_count;
5110 register struct reloc_ext_external *rel;
5111 struct reloc_ext_external *rel_end;
5113 output_bfd = finfo->output_bfd;
5114 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
5116 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
5117 BFD_ASSERT (input_bfd->xvec->header_byteorder
5118 == output_bfd->xvec->header_byteorder);
5120 relocateable = finfo->info->relocateable;
5121 syms = obj_aout_external_syms (input_bfd);
5122 strings = obj_aout_external_strings (input_bfd);
5123 sym_hashes = obj_aout_sym_hashes (input_bfd);
5124 symbol_map = finfo->symbol_map;
5126 reloc_count = rel_size / RELOC_EXT_SIZE;
5128 rel_end = rel + reloc_count;
5129 for (; rel < rel_end; rel++)
5134 unsigned int r_type;
5136 struct aout_link_hash_entry *h = NULL;
5137 asection *r_section = NULL;
5140 r_addr = GET_SWORD (input_bfd, rel->r_address);
5142 if (bfd_header_big_endian (input_bfd))
5144 r_index = ((rel->r_index[0] << 16)
5145 | (rel->r_index[1] << 8)
5147 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
5148 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
5149 >> RELOC_EXT_BITS_TYPE_SH_BIG);
5153 r_index = ((rel->r_index[2] << 16)
5154 | (rel->r_index[1] << 8)
5156 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
5157 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
5158 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
5161 r_addend = GET_SWORD (input_bfd, rel->r_addend);
5163 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
5167 /* We are generating a relocateable output file, and must
5168 modify the reloc accordingly. */
5170 || r_type == RELOC_BASE10
5171 || r_type == RELOC_BASE13
5172 || r_type == RELOC_BASE22)
5174 /* If we know the symbol this relocation is against,
5175 convert it into a relocation against a section. This
5176 is what the native linker does. */
5177 if (r_type == RELOC_BASE10
5178 || r_type == RELOC_BASE13
5179 || r_type == RELOC_BASE22)
5182 h = sym_hashes[r_index];
5183 if (h != (struct aout_link_hash_entry *) NULL
5184 && (h->root.type == bfd_link_hash_defined
5185 || h->root.type == bfd_link_hash_defweak))
5187 asection *output_section;
5189 /* Change the r_extern value. */
5190 if (bfd_header_big_endian (output_bfd))
5191 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
5193 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
5195 /* Compute a new r_index. */
5196 output_section = h->root.u.def.section->output_section;
5197 if (output_section == obj_textsec (output_bfd))
5199 else if (output_section == obj_datasec (output_bfd))
5201 else if (output_section == obj_bsssec (output_bfd))
5206 /* Add the symbol value and the section VMA to the
5208 relocation = (h->root.u.def.value
5209 + output_section->vma
5210 + h->root.u.def.section->output_offset);
5212 /* Now RELOCATION is the VMA of the final
5213 destination. If this is a PC relative reloc,
5214 then ADDEND is the negative of the source VMA.
5215 We want to set ADDEND to the difference between
5216 the destination VMA and the source VMA, which
5217 means we must adjust RELOCATION by the change in
5218 the source VMA. This is done below. */
5222 /* We must change r_index according to the symbol
5224 r_index = symbol_map[r_index];
5230 /* We decided to strip this symbol, but it
5231 turns out that we can't. Note that we
5232 lose the other and desc information here.
5233 I don't think that will ever matter for a
5239 if (! aout_link_write_other_symbol (h,
5249 name = strings + GET_WORD (input_bfd,
5250 syms[r_index].e_strx);
5251 if (! ((*finfo->info->callbacks->unattached_reloc)
5252 (finfo->info, name, input_bfd, input_section,
5261 /* If this is a PC relative reloc, then the addend
5262 is the negative of the source VMA. We must
5263 adjust it by the change in the source VMA. This
5267 /* Write out the new r_index value. */
5268 if (bfd_header_big_endian (output_bfd))
5270 rel->r_index[0] = r_index >> 16;
5271 rel->r_index[1] = r_index >> 8;
5272 rel->r_index[2] = r_index;
5276 rel->r_index[2] = r_index >> 16;
5277 rel->r_index[1] = r_index >> 8;
5278 rel->r_index[0] = r_index;
5283 /* This is a relocation against a section. We must
5284 adjust by the amount that the section moved. */
5285 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5286 relocation = (r_section->output_section->vma
5287 + r_section->output_offset
5290 /* If this is a PC relative reloc, then the addend is
5291 the difference in VMA between the destination and the
5292 source. We have just adjusted for the change in VMA
5293 of the destination, so we must also adjust by the
5294 change in VMA of the source. This is done below. */
5297 /* As described above, we must always adjust a PC relative
5298 reloc by the change in VMA of the source. However, if
5299 pcrel_offset is set, then the addend does not include the
5300 location within the section, in which case we don't need
5301 to adjust anything. */
5302 if (howto_table_ext[r_type].pc_relative
5303 && ! howto_table_ext[r_type].pcrel_offset)
5304 relocation -= (input_section->output_section->vma
5305 + input_section->output_offset
5306 - input_section->vma);
5308 /* Change the addend if necessary. */
5309 if (relocation != 0)
5310 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
5312 /* Change the address of the relocation. */
5313 PUT_WORD (output_bfd,
5314 r_addr + input_section->output_offset,
5320 bfd_reloc_status_type r;
5322 /* We are generating an executable, and must do a full
5328 h = sym_hashes[r_index];
5330 if (h != (struct aout_link_hash_entry *) NULL
5331 && (h->root.type == bfd_link_hash_defined
5332 || h->root.type == bfd_link_hash_defweak))
5334 relocation = (h->root.u.def.value
5335 + h->root.u.def.section->output_section->vma
5336 + h->root.u.def.section->output_offset);
5338 else if (h != (struct aout_link_hash_entry *) NULL
5339 && h->root.type == bfd_link_hash_undefweak)
5347 else if (r_type == RELOC_BASE10
5348 || r_type == RELOC_BASE13
5349 || r_type == RELOC_BASE22)
5351 struct external_nlist *sym;
5354 /* For base relative relocs, r_index is always an index
5355 into the symbol table, even if r_extern is 0. */
5356 sym = syms + r_index;
5357 type = bfd_h_get_8 (input_bfd, sym->e_type);
5358 if ((type & N_TYPE) == N_TEXT
5360 r_section = obj_textsec (input_bfd);
5361 else if ((type & N_TYPE) == N_DATA
5363 r_section = obj_datasec (input_bfd);
5364 else if ((type & N_TYPE) == N_BSS
5366 r_section = obj_bsssec (input_bfd);
5367 else if ((type & N_TYPE) == N_ABS
5369 r_section = bfd_abs_section_ptr;
5372 relocation = (r_section->output_section->vma
5373 + r_section->output_offset
5374 + (GET_WORD (input_bfd, sym->e_value)
5379 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5381 /* If this is a PC relative reloc, then R_ADDEND is the
5382 difference between the two vmas, or
5383 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
5385 old_dest_sec == section->vma
5387 old_src_sec == input_section->vma
5389 old_src_off == r_addr
5391 _bfd_final_link_relocate expects RELOCATION +
5392 R_ADDEND to be the VMA of the destination minus
5393 r_addr (the minus r_addr is because this relocation
5394 is not pcrel_offset, which is a bit confusing and
5395 should, perhaps, be changed), or
5398 new_dest_sec == output_section->vma + output_offset
5399 We arrange for this to happen by setting RELOCATION to
5400 new_dest_sec + old_src_sec - old_dest_sec
5402 If this is not a PC relative reloc, then R_ADDEND is
5403 simply the VMA of the destination, so we set
5404 RELOCATION to the change in the destination VMA, or
5405 new_dest_sec - old_dest_sec
5407 relocation = (r_section->output_section->vma
5408 + r_section->output_offset
5410 if (howto_table_ext[r_type].pc_relative)
5411 relocation += input_section->vma;
5414 if (check_dynamic_reloc != NULL)
5418 if (! ((*check_dynamic_reloc)
5419 (finfo->info, input_bfd, input_section, h,
5420 (PTR) rel, contents, &skip, &relocation)))
5426 /* Now warn if a global symbol is undefined. We could not
5427 do this earlier, because check_dynamic_reloc might want
5428 to skip this reloc. */
5430 && ! finfo->info->shared
5431 && r_type != RELOC_BASE10
5432 && r_type != RELOC_BASE13
5433 && r_type != RELOC_BASE22)
5438 name = h->root.root.string;
5440 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5441 if (! ((*finfo->info->callbacks->undefined_symbol)
5442 (finfo->info, name, input_bfd, input_section,
5447 if (r_type != RELOC_SPARC_REV32)
5448 r = MY_final_link_relocate (howto_table_ext + r_type,
5449 input_bfd, input_section,
5450 contents, r_addr, relocation,
5456 x = bfd_get_32 (input_bfd, contents + r_addr);
5457 x = x + relocation + r_addend;
5458 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
5462 if (r != bfd_reloc_ok)
5467 case bfd_reloc_outofrange:
5469 case bfd_reloc_overflow:
5474 name = h->root.root.string;
5476 || r_type == RELOC_BASE10
5477 || r_type == RELOC_BASE13
5478 || r_type == RELOC_BASE22)
5479 name = strings + GET_WORD (input_bfd,
5480 syms[r_index].e_strx);
5485 s = aout_reloc_index_to_section (input_bfd, r_index);
5486 name = bfd_section_name (input_bfd, s);
5488 if (! ((*finfo->info->callbacks->reloc_overflow)
5489 (finfo->info, name, howto_table_ext[r_type].name,
5490 r_addend, input_bfd, input_section, r_addr)))
5502 /* Handle a link order which is supposed to generate a reloc. */
5505 aout_link_reloc_link_order (finfo, o, p)
5506 struct aout_final_link_info *finfo;
5508 struct bfd_link_order *p;
5510 struct bfd_link_order_reloc *pr;
5513 reloc_howto_type *howto;
5514 file_ptr *reloff_ptr = NULL;
5515 struct reloc_std_external srel;
5516 struct reloc_ext_external erel;
5521 if (p->type == bfd_section_reloc_link_order)
5524 if (bfd_is_abs_section (pr->u.section))
5525 r_index = N_ABS | N_EXT;
5528 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5529 r_index = pr->u.section->target_index;
5534 struct aout_link_hash_entry *h;
5536 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5538 h = ((struct aout_link_hash_entry *)
5539 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
5540 pr->u.name, false, false, true));
5541 if (h != (struct aout_link_hash_entry *) NULL
5546 /* We decided to strip this symbol, but it turns out that we
5547 can't. Note that we lose the other and desc information
5548 here. I don't think that will ever matter for a global
5552 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5558 if (! ((*finfo->info->callbacks->unattached_reloc)
5559 (finfo->info, pr->u.name, (bfd *) NULL,
5560 (asection *) NULL, (bfd_vma) 0)))
5566 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5569 bfd_set_error (bfd_error_bad_value);
5573 if (o == obj_textsec (finfo->output_bfd))
5574 reloff_ptr = &finfo->treloff;
5575 else if (o == obj_datasec (finfo->output_bfd))
5576 reloff_ptr = &finfo->dreloff;
5580 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5583 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto,
5593 r_pcrel = howto->pc_relative;
5594 r_baserel = (howto->type & 8) != 0;
5595 r_jmptable = (howto->type & 16) != 0;
5596 r_relative = (howto->type & 32) != 0;
5597 r_length = howto->size;
5599 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5600 if (bfd_header_big_endian (finfo->output_bfd))
5602 srel.r_index[0] = r_index >> 16;
5603 srel.r_index[1] = r_index >> 8;
5604 srel.r_index[2] = r_index;
5606 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5607 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5608 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5609 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5610 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5611 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5615 srel.r_index[2] = r_index >> 16;
5616 srel.r_index[1] = r_index >> 8;
5617 srel.r_index[0] = r_index;
5619 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5620 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5621 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5622 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5623 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5624 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5628 rel_ptr = (PTR) &srel;
5630 /* We have to write the addend into the object file, since
5631 standard a.out relocs are in place. It would be more
5632 reliable if we had the current contents of the file here,
5633 rather than assuming zeroes, but we can't read the file since
5634 it was opened using bfd_openw. */
5635 if (pr->addend != 0)
5638 bfd_reloc_status_type r;
5642 size = bfd_get_reloc_size (howto);
5643 buf = (bfd_byte *) bfd_zmalloc (size);
5644 if (buf == (bfd_byte *) NULL)
5646 r = MY_relocate_contents (howto, finfo->output_bfd,
5653 case bfd_reloc_outofrange:
5655 case bfd_reloc_overflow:
5656 if (! ((*finfo->info->callbacks->reloc_overflow)
5658 (p->type == bfd_section_reloc_link_order
5659 ? bfd_section_name (finfo->output_bfd,
5662 howto->name, pr->addend, (bfd *) NULL,
5663 (asection *) NULL, (bfd_vma) 0)))
5670 ok = bfd_set_section_contents (finfo->output_bfd, o,
5672 (file_ptr) p->offset,
5681 #ifdef MY_put_ext_reloc
5682 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
5683 howto, &erel, pr->addend);
5685 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5687 if (bfd_header_big_endian (finfo->output_bfd))
5689 erel.r_index[0] = r_index >> 16;
5690 erel.r_index[1] = r_index >> 8;
5691 erel.r_index[2] = r_index;
5693 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5694 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5698 erel.r_index[2] = r_index >> 16;
5699 erel.r_index[1] = r_index >> 8;
5700 erel.r_index[0] = r_index;
5702 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5703 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5706 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
5707 #endif /* MY_put_ext_reloc */
5709 rel_ptr = (PTR) &erel;
5712 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5713 || (bfd_write (rel_ptr, (bfd_size_type) 1,
5714 obj_reloc_entry_size (finfo->output_bfd),
5716 != obj_reloc_entry_size (finfo->output_bfd)))
5719 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5721 /* Assert that the relocs have not run into the symbols, and that n
5722 the text relocs have not run into the data relocs. */
5723 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5724 && (reloff_ptr != &finfo->treloff
5726 <= obj_datasec (finfo->output_bfd)->rel_filepos)));