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:
782 case bfd_mach_mips64:
783 /* FIXME: These should be MIPS3, MIPS4, MIPS16, MIPS32, etc. */
784 arch_flags = M_MIPS2;
787 arch_flags = M_UNKNOWN;
794 case 0: arch_flags = M_NS32532; break;
795 case 32032: arch_flags = M_NS32032; break;
796 case 32532: arch_flags = M_NS32532; break;
797 default: arch_flags = M_UNKNOWN; break;
806 if (machine == 0 || machine == 255) arch_flags = M_CRIS;
810 arch_flags = M_UNKNOWN;
813 if (arch_flags != M_UNKNOWN)
821 aout_@var{size}_set_arch_mach
824 boolean aout_@var{size}_set_arch_mach,
826 enum bfd_architecture arch,
827 unsigned long machine));
830 Set the architecture and the machine of the BFD @var{abfd} to the
831 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
832 can support the architecture required.
836 NAME(aout,set_arch_mach) (abfd, arch, machine)
838 enum bfd_architecture arch;
839 unsigned long machine;
841 if (! bfd_default_set_arch_mach (abfd, arch, machine))
844 if (arch != bfd_arch_unknown)
848 NAME(aout,machine_type) (arch, machine, &unknown);
853 /* Determine the size of a relocation entry */
858 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
861 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
865 return (*aout_backend_info(abfd)->set_sizes) (abfd);
869 adjust_o_magic (abfd, execp)
871 struct internal_exec *execp;
873 file_ptr pos = adata (abfd).exec_bytes_size;
878 obj_textsec(abfd)->filepos = pos;
879 if (!obj_textsec(abfd)->user_set_vma)
880 obj_textsec(abfd)->vma = vma;
882 vma = obj_textsec(abfd)->vma;
884 pos += obj_textsec(abfd)->_raw_size;
885 vma += obj_textsec(abfd)->_raw_size;
888 if (!obj_datasec(abfd)->user_set_vma)
890 #if 0 /* ?? Does alignment in the file image really matter? */
891 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
893 obj_textsec(abfd)->_raw_size += pad;
896 obj_datasec(abfd)->vma = vma;
899 vma = obj_datasec(abfd)->vma;
900 obj_datasec(abfd)->filepos = pos;
901 pos += obj_datasec(abfd)->_raw_size;
902 vma += obj_datasec(abfd)->_raw_size;
905 if (!obj_bsssec(abfd)->user_set_vma)
908 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
910 obj_datasec(abfd)->_raw_size += pad;
913 obj_bsssec(abfd)->vma = vma;
917 /* The VMA of the .bss section is set by the the VMA of the
918 .data section plus the size of the .data section. We may
919 need to add padding bytes to make this true. */
920 pad = obj_bsssec (abfd)->vma - vma;
923 obj_datasec (abfd)->_raw_size += pad;
927 obj_bsssec(abfd)->filepos = pos;
929 /* Fix up the exec header. */
930 execp->a_text = obj_textsec(abfd)->_raw_size;
931 execp->a_data = obj_datasec(abfd)->_raw_size;
932 execp->a_bss = obj_bsssec(abfd)->_raw_size;
933 N_SET_MAGIC (*execp, OMAGIC);
937 adjust_z_magic (abfd, execp)
939 struct internal_exec *execp;
941 bfd_size_type data_pad, text_pad;
943 CONST struct aout_backend_data *abdp;
944 int ztih; /* Nonzero if text includes exec header. */
946 abdp = aout_backend_info (abfd);
950 && (abdp->text_includes_header
951 || obj_aout_subformat (abfd) == q_magic_format));
952 obj_textsec(abfd)->filepos = (ztih
953 ? adata(abfd).exec_bytes_size
954 : adata(abfd).zmagic_disk_block_size);
955 if (! obj_textsec(abfd)->user_set_vma)
957 /* ?? Do we really need to check for relocs here? */
958 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
961 ? (abdp->default_text_vma
962 + adata(abfd).exec_bytes_size)
963 : abdp->default_text_vma));
968 /* The .text section is being loaded at an unusual address. We
969 may need to pad it such that the .data section starts at a page
972 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
973 & (adata (abfd).page_size - 1));
975 text_pad = ((- obj_textsec (abfd)->vma)
976 & (adata (abfd).page_size - 1));
979 /* Find start of data. */
982 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
983 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
987 /* Note that if page_size == zmagic_disk_block_size, then
988 filepos == page_size, and this case is the same as the ztih
990 text_end = obj_textsec (abfd)->_raw_size;
991 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
992 text_end += obj_textsec (abfd)->filepos;
994 obj_textsec(abfd)->_raw_size += text_pad;
995 text_end += text_pad;
998 if (!obj_datasec(abfd)->user_set_vma)
1001 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
1002 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1004 if (abdp && abdp->zmagic_mapped_contiguous)
1006 text_pad = (obj_datasec(abfd)->vma
1007 - obj_textsec(abfd)->vma
1008 - obj_textsec(abfd)->_raw_size);
1009 obj_textsec(abfd)->_raw_size += text_pad;
1011 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
1012 + obj_textsec(abfd)->_raw_size);
1014 /* Fix up exec header while we're at it. */
1015 execp->a_text = obj_textsec(abfd)->_raw_size;
1016 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
1017 execp->a_text += adata(abfd).exec_bytes_size;
1018 if (obj_aout_subformat (abfd) == q_magic_format)
1019 N_SET_MAGIC (*execp, QMAGIC);
1021 N_SET_MAGIC (*execp, ZMAGIC);
1023 /* Spec says data section should be rounded up to page boundary. */
1024 obj_datasec(abfd)->_raw_size
1025 = align_power (obj_datasec(abfd)->_raw_size,
1026 obj_bsssec(abfd)->alignment_power);
1027 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
1028 adata(abfd).page_size);
1029 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
1032 if (!obj_bsssec(abfd)->user_set_vma)
1033 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
1034 + obj_datasec(abfd)->_raw_size);
1035 /* If the BSS immediately follows the data section and extra space
1036 in the page is left after the data section, fudge data
1037 in the header so that the bss section looks smaller by that
1038 amount. We'll start the bss section there, and lie to the OS.
1039 (Note that a linker script, as well as the above assignment,
1040 could have explicitly set the BSS vma to immediately follow
1041 the data section.) */
1042 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
1043 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
1044 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
1045 obj_bsssec(abfd)->_raw_size - data_pad;
1047 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1051 adjust_n_magic (abfd, execp)
1053 struct internal_exec *execp;
1055 file_ptr pos = adata(abfd).exec_bytes_size;
1060 obj_textsec(abfd)->filepos = pos;
1061 if (!obj_textsec(abfd)->user_set_vma)
1062 obj_textsec(abfd)->vma = vma;
1064 vma = obj_textsec(abfd)->vma;
1065 pos += obj_textsec(abfd)->_raw_size;
1066 vma += obj_textsec(abfd)->_raw_size;
1069 obj_datasec(abfd)->filepos = pos;
1070 if (!obj_datasec(abfd)->user_set_vma)
1071 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1072 vma = obj_datasec(abfd)->vma;
1074 /* Since BSS follows data immediately, see if it needs alignment. */
1075 vma += obj_datasec(abfd)->_raw_size;
1076 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
1077 obj_datasec(abfd)->_raw_size += pad;
1078 pos += obj_datasec(abfd)->_raw_size;
1081 if (!obj_bsssec(abfd)->user_set_vma)
1082 obj_bsssec(abfd)->vma = vma;
1084 vma = obj_bsssec(abfd)->vma;
1086 /* Fix up exec header. */
1087 execp->a_text = obj_textsec(abfd)->_raw_size;
1088 execp->a_data = obj_datasec(abfd)->_raw_size;
1089 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1090 N_SET_MAGIC (*execp, NMAGIC);
1094 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1096 bfd_size_type *text_size;
1097 file_ptr *text_end ATTRIBUTE_UNUSED;
1099 struct internal_exec *execp = exec_hdr (abfd);
1101 if (! NAME(aout,make_sections) (abfd))
1104 if (adata(abfd).magic != undecided_magic)
1107 obj_textsec(abfd)->_raw_size =
1108 align_power(obj_textsec(abfd)->_raw_size,
1109 obj_textsec(abfd)->alignment_power);
1111 *text_size = obj_textsec (abfd)->_raw_size;
1112 /* Rule (heuristic) for when to pad to a new page. Note that there
1113 are (at least) two ways demand-paged (ZMAGIC) files have been
1114 handled. Most Berkeley-based systems start the text segment at
1115 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1116 segment right after the exec header; the latter is counted in the
1117 text segment size, and is paged in by the kernel with the rest of
1120 /* This perhaps isn't the right way to do this, but made it simpler for me
1121 to understand enough to implement it. Better would probably be to go
1122 right from BFD flags to alignment/positioning characteristics. But the
1123 old code was sloppy enough about handling the flags, and had enough
1124 other magic, that it was a little hard for me to understand. I think
1125 I understand it better now, but I haven't time to do the cleanup this
1128 if (abfd->flags & D_PAGED)
1129 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1130 adata(abfd).magic = z_magic;
1131 else if (abfd->flags & WP_TEXT)
1132 adata(abfd).magic = n_magic;
1134 adata(abfd).magic = o_magic;
1136 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1138 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1140 switch (adata(abfd).magic) {
1141 case n_magic: str = "NMAGIC"; break;
1142 case o_magic: str = "OMAGIC"; break;
1143 case z_magic: str = "ZMAGIC"; break;
1148 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1149 obj_textsec(abfd)->alignment_power,
1150 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1151 obj_datasec(abfd)->alignment_power,
1152 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
1153 obj_bsssec(abfd)->alignment_power);
1157 switch (adata(abfd).magic)
1160 adjust_o_magic (abfd, execp);
1163 adjust_z_magic (abfd, execp);
1166 adjust_n_magic (abfd, execp);
1172 #ifdef BFD_AOUT_DEBUG
1173 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1174 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1175 obj_textsec(abfd)->filepos,
1176 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1177 obj_datasec(abfd)->filepos,
1178 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
1186 aout_@var{size}_new_section_hook
1189 boolean aout_@var{size}_new_section_hook,
1191 asection *newsect));
1194 Called by the BFD in response to a @code{bfd_make_section}
1198 NAME(aout,new_section_hook) (abfd, newsect)
1202 /* align to double at least */
1203 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1205 if (bfd_get_format (abfd) == bfd_object)
1207 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1208 obj_textsec(abfd)= newsect;
1209 newsect->target_index = N_TEXT;
1213 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1214 obj_datasec(abfd) = newsect;
1215 newsect->target_index = N_DATA;
1219 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1220 obj_bsssec(abfd) = newsect;
1221 newsect->target_index = N_BSS;
1227 /* We allow more than three sections internally */
1232 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1237 bfd_size_type count;
1240 bfd_size_type text_size;
1242 if (! abfd->output_has_begun)
1244 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1248 if (section == obj_bsssec (abfd))
1250 bfd_set_error (bfd_error_no_contents);
1254 if (section != obj_textsec (abfd)
1255 && section != obj_datasec (abfd))
1257 (*_bfd_error_handler)
1258 (_("%s: can not represent section `%s' in a.out object file format"),
1259 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1260 bfd_set_error (bfd_error_nonrepresentable_section);
1266 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1267 || bfd_write (location, 1, count, abfd) != count)
1274 /* Read the external symbols from an a.out file. */
1277 aout_get_external_symbols (abfd)
1280 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1282 bfd_size_type count;
1283 struct external_nlist *syms;
1285 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1288 if (bfd_get_file_window (abfd,
1289 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms,
1290 &obj_aout_sym_window (abfd), true) == false)
1292 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1294 /* We allocate using malloc to make the values easy to free
1295 later on. If we put them on the objalloc it might not be
1296 possible to free them. */
1297 syms = ((struct external_nlist *)
1298 bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1299 if (syms == (struct external_nlist *) NULL && count != 0)
1302 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1303 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1304 != exec_hdr (abfd)->a_syms))
1311 obj_aout_external_syms (abfd) = syms;
1312 obj_aout_external_sym_count (abfd) = count;
1315 if (obj_aout_external_strings (abfd) == NULL
1316 && exec_hdr (abfd)->a_syms != 0)
1318 unsigned char string_chars[BYTES_IN_WORD];
1319 bfd_size_type stringsize;
1322 /* Get the size of the strings. */
1323 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1324 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1327 stringsize = GET_WORD (abfd, string_chars);
1330 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1331 &obj_aout_string_window (abfd), true) == false)
1333 strings = (char *) obj_aout_string_window (abfd).data;
1335 strings = (char *) bfd_malloc ((size_t) stringsize + 1);
1336 if (strings == NULL)
1339 /* Skip space for the string count in the buffer for convenience
1340 when using indexes. */
1341 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1343 != stringsize - BYTES_IN_WORD)
1350 /* Ensure that a zero index yields an empty string. */
1353 strings[stringsize - 1] = 0;
1355 obj_aout_external_strings (abfd) = strings;
1356 obj_aout_external_string_size (abfd) = stringsize;
1362 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1363 and symbol->value fields of CACHE_PTR will be set from the a.out
1364 nlist structure. This function is responsible for setting
1365 symbol->flags and symbol->section, and adjusting symbol->value. */
1368 translate_from_native_sym_flags (abfd, cache_ptr)
1370 aout_symbol_type *cache_ptr;
1374 if ((cache_ptr->type & N_STAB) != 0
1375 || cache_ptr->type == N_FN)
1379 /* This is a debugging symbol. */
1381 cache_ptr->symbol.flags = BSF_DEBUGGING;
1383 /* Work out the symbol section. */
1384 switch (cache_ptr->type & N_TYPE)
1388 sec = obj_textsec (abfd);
1391 sec = obj_datasec (abfd);
1394 sec = obj_bsssec (abfd);
1398 sec = bfd_abs_section_ptr;
1402 cache_ptr->symbol.section = sec;
1403 cache_ptr->symbol.value -= sec->vma;
1408 /* Get the default visibility. This does not apply to all types, so
1409 we just hold it in a local variable to use if wanted. */
1410 if ((cache_ptr->type & N_EXT) == 0)
1411 visible = BSF_LOCAL;
1413 visible = BSF_GLOBAL;
1415 switch (cache_ptr->type)
1418 case N_ABS: case N_ABS | N_EXT:
1419 cache_ptr->symbol.section = bfd_abs_section_ptr;
1420 cache_ptr->symbol.flags = visible;
1423 case N_UNDF | N_EXT:
1424 if (cache_ptr->symbol.value != 0)
1426 /* This is a common symbol. */
1427 cache_ptr->symbol.flags = BSF_GLOBAL;
1428 cache_ptr->symbol.section = bfd_com_section_ptr;
1432 cache_ptr->symbol.flags = 0;
1433 cache_ptr->symbol.section = bfd_und_section_ptr;
1437 case N_TEXT: case N_TEXT | N_EXT:
1438 cache_ptr->symbol.section = obj_textsec (abfd);
1439 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1440 cache_ptr->symbol.flags = visible;
1443 /* N_SETV symbols used to represent set vectors placed in the
1444 data section. They are no longer generated. Theoretically,
1445 it was possible to extract the entries and combine them with
1446 new ones, although I don't know if that was ever actually
1447 done. Unless that feature is restored, treat them as data
1449 case N_SETV: case N_SETV | N_EXT:
1450 case N_DATA: case N_DATA | N_EXT:
1451 cache_ptr->symbol.section = obj_datasec (abfd);
1452 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1453 cache_ptr->symbol.flags = visible;
1456 case N_BSS: case N_BSS | N_EXT:
1457 cache_ptr->symbol.section = obj_bsssec (abfd);
1458 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1459 cache_ptr->symbol.flags = visible;
1462 case N_SETA: case N_SETA | N_EXT:
1463 case N_SETT: case N_SETT | N_EXT:
1464 case N_SETD: case N_SETD | N_EXT:
1465 case N_SETB: case N_SETB | N_EXT:
1467 /* This code is no longer needed. It used to be used to make
1468 the linker handle set symbols, but they are now handled in
1469 the add_symbols routine instead. */
1472 arelent_chain *reloc;
1473 asection *into_section;
1475 /* This is a set symbol. The name of the symbol is the name
1476 of the set (e.g., __CTOR_LIST__). The value of the symbol
1477 is the value to add to the set. We create a section with
1478 the same name as the symbol, and add a reloc to insert the
1479 appropriate value into the section.
1481 This action is actually obsolete; it used to make the
1482 linker do the right thing, but the linker no longer uses
1485 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1486 if (section == NULL)
1490 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1494 strcpy (copy, cache_ptr->symbol.name);
1495 section = bfd_make_section (abfd, copy);
1496 if (section == NULL)
1500 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1504 /* Build a relocation entry for the constructor. */
1505 switch (cache_ptr->type & N_TYPE)
1508 into_section = bfd_abs_section_ptr;
1509 cache_ptr->type = N_ABS;
1512 into_section = obj_textsec (abfd);
1513 cache_ptr->type = N_TEXT;
1516 into_section = obj_datasec (abfd);
1517 cache_ptr->type = N_DATA;
1520 into_section = obj_bsssec (abfd);
1521 cache_ptr->type = N_BSS;
1525 /* Build a relocation pointing into the constructor section
1526 pointing at the symbol in the set vector specified. */
1527 reloc->relent.addend = cache_ptr->symbol.value;
1528 cache_ptr->symbol.section = into_section;
1529 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1531 /* We modify the symbol to belong to a section depending upon
1532 the name of the symbol, and add to the size of the section
1533 to contain a pointer to the symbol. Build a reloc entry to
1534 relocate to this symbol attached to this section. */
1535 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1537 section->reloc_count++;
1538 section->alignment_power = 2;
1540 reloc->next = section->constructor_chain;
1541 section->constructor_chain = reloc;
1542 reloc->relent.address = section->_raw_size;
1543 section->_raw_size += BYTES_IN_WORD;
1545 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd);
1549 switch (cache_ptr->type & N_TYPE)
1552 cache_ptr->symbol.section = bfd_abs_section_ptr;
1555 cache_ptr->symbol.section = obj_textsec (abfd);
1558 cache_ptr->symbol.section = obj_datasec (abfd);
1561 cache_ptr->symbol.section = obj_bsssec (abfd);
1565 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1570 /* This symbol is the text of a warning message. The next
1571 symbol is the symbol to associate the warning with. If a
1572 reference is made to that symbol, a warning is issued. */
1573 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1574 cache_ptr->symbol.section = bfd_abs_section_ptr;
1577 case N_INDR: case N_INDR | N_EXT:
1578 /* An indirect symbol. This consists of two symbols in a row.
1579 The first symbol is the name of the indirection. The second
1580 symbol is the name of the target. A reference to the first
1581 symbol becomes a reference to the second. */
1582 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1583 cache_ptr->symbol.section = bfd_ind_section_ptr;
1587 cache_ptr->symbol.section = bfd_und_section_ptr;
1588 cache_ptr->symbol.flags = BSF_WEAK;
1592 cache_ptr->symbol.section = bfd_abs_section_ptr;
1593 cache_ptr->symbol.flags = BSF_WEAK;
1597 cache_ptr->symbol.section = obj_textsec (abfd);
1598 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1599 cache_ptr->symbol.flags = BSF_WEAK;
1603 cache_ptr->symbol.section = obj_datasec (abfd);
1604 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1605 cache_ptr->symbol.flags = BSF_WEAK;
1609 cache_ptr->symbol.section = obj_bsssec (abfd);
1610 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1611 cache_ptr->symbol.flags = BSF_WEAK;
1618 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1621 translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1624 struct external_nlist *sym_pointer;
1626 bfd_vma value = cache_ptr->value;
1630 /* Mask out any existing type bits in case copying from one section
1632 sym_pointer->e_type[0] &= ~N_TYPE;
1634 sec = bfd_get_section (cache_ptr);
1639 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1641 (*_bfd_error_handler)
1642 (_("%s: can not represent section for symbol `%s' in a.out object file format"),
1643 bfd_get_filename (abfd),
1644 cache_ptr->name != NULL ? cache_ptr->name : _("*unknown*"));
1645 bfd_set_error (bfd_error_nonrepresentable_section);
1649 if (sec->output_section != NULL)
1651 off = sec->output_offset;
1652 sec = sec->output_section;
1655 if (bfd_is_abs_section (sec))
1656 sym_pointer->e_type[0] |= N_ABS;
1657 else if (sec == obj_textsec (abfd))
1658 sym_pointer->e_type[0] |= N_TEXT;
1659 else if (sec == obj_datasec (abfd))
1660 sym_pointer->e_type[0] |= N_DATA;
1661 else if (sec == obj_bsssec (abfd))
1662 sym_pointer->e_type[0] |= N_BSS;
1663 else if (bfd_is_und_section (sec))
1664 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1665 else if (bfd_is_ind_section (sec))
1666 sym_pointer->e_type[0] = N_INDR;
1667 else if (bfd_is_com_section (sec))
1668 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1671 (*_bfd_error_handler)
1672 (_("%s: can not represent section `%s' in a.out object file format"),
1673 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1674 bfd_set_error (bfd_error_nonrepresentable_section);
1678 /* Turn the symbol from section relative to absolute again */
1679 value += sec->vma + off;
1681 if ((cache_ptr->flags & BSF_WARNING) != 0)
1682 sym_pointer->e_type[0] = N_WARNING;
1684 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1685 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1686 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1687 sym_pointer->e_type[0] |= N_EXT;
1688 else if ((cache_ptr->flags & BSF_LOCAL) != 0)
1689 sym_pointer->e_type[0] &= ~N_EXT;
1691 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1693 int type = ((aout_symbol_type *) cache_ptr)->type;
1696 case N_ABS: type = N_SETA; break;
1697 case N_TEXT: type = N_SETT; break;
1698 case N_DATA: type = N_SETD; break;
1699 case N_BSS: type = N_SETB; break;
1701 sym_pointer->e_type[0] = type;
1704 if ((cache_ptr->flags & BSF_WEAK) != 0)
1708 switch (sym_pointer->e_type[0] & N_TYPE)
1711 case N_ABS: type = N_WEAKA; break;
1712 case N_TEXT: type = N_WEAKT; break;
1713 case N_DATA: type = N_WEAKD; break;
1714 case N_BSS: type = N_WEAKB; break;
1715 case N_UNDF: type = N_WEAKU; break;
1717 sym_pointer->e_type[0] = type;
1720 PUT_WORD(abfd, value, sym_pointer->e_value);
1725 /* Native-level interface to symbols. */
1728 NAME(aout,make_empty_symbol) (abfd)
1731 aout_symbol_type *new =
1732 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1735 new->symbol.the_bfd = abfd;
1737 return &new->symbol;
1740 /* Translate a set of internal symbols into external symbols. */
1743 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1745 aout_symbol_type *in;
1746 struct external_nlist *ext;
1747 bfd_size_type count;
1749 bfd_size_type strsize;
1752 struct external_nlist *ext_end;
1754 ext_end = ext + count;
1755 for (; ext < ext_end; ext++, in++)
1759 x = GET_WORD (abfd, ext->e_strx);
1760 in->symbol.the_bfd = abfd;
1762 /* For the normal symbols, the zero index points at the number
1763 of bytes in the string table but is to be interpreted as the
1764 null string. For the dynamic symbols, the number of bytes in
1765 the string table is stored in the __DYNAMIC structure and the
1766 zero index points at an actual string. */
1767 if (x == 0 && ! dynamic)
1768 in->symbol.name = "";
1769 else if (x < strsize)
1770 in->symbol.name = str + x;
1774 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1775 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1776 in->other = bfd_h_get_8 (abfd, ext->e_other);
1777 in->type = bfd_h_get_8 (abfd, ext->e_type);
1778 in->symbol.udata.p = NULL;
1780 if (! translate_from_native_sym_flags (abfd, in))
1784 in->symbol.flags |= BSF_DYNAMIC;
1790 /* We read the symbols into a buffer, which is discarded when this
1791 function exits. We read the strings into a buffer large enough to
1792 hold them all plus all the cached symbol entries. */
1795 NAME(aout,slurp_symbol_table) (abfd)
1798 struct external_nlist *old_external_syms;
1799 aout_symbol_type *cached;
1802 /* If there's no work to be done, don't do any */
1803 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1806 old_external_syms = obj_aout_external_syms (abfd);
1808 if (! aout_get_external_symbols (abfd))
1811 cached_size = (obj_aout_external_sym_count (abfd)
1812 * sizeof (aout_symbol_type));
1813 cached = (aout_symbol_type *) bfd_malloc (cached_size);
1814 if (cached == NULL && cached_size != 0)
1816 if (cached_size != 0)
1817 memset (cached, 0, cached_size);
1819 /* Convert from external symbol information to internal. */
1820 if (! (NAME(aout,translate_symbol_table)
1822 obj_aout_external_syms (abfd),
1823 obj_aout_external_sym_count (abfd),
1824 obj_aout_external_strings (abfd),
1825 obj_aout_external_string_size (abfd),
1832 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1834 obj_aout_symbols (abfd) = cached;
1836 /* It is very likely that anybody who calls this function will not
1837 want the external symbol information, so if it was allocated
1838 because of our call to aout_get_external_symbols, we free it up
1839 right away to save space. */
1840 if (old_external_syms == (struct external_nlist *) NULL
1841 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1844 bfd_free_window (&obj_aout_sym_window (abfd));
1846 free (obj_aout_external_syms (abfd));
1848 obj_aout_external_syms (abfd) = NULL;
1854 /* We use a hash table when writing out symbols so that we only write
1855 out a particular string once. This helps particularly when the
1856 linker writes out stabs debugging entries, because each different
1857 contributing object file tends to have many duplicate stabs
1860 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1861 if BFD_TRADITIONAL_FORMAT is set. */
1863 static bfd_size_type add_to_stringtab
1864 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean));
1865 static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *));
1867 /* Get the index of a string in a strtab, adding it if it is not
1870 static INLINE bfd_size_type
1871 add_to_stringtab (abfd, tab, str, copy)
1873 struct bfd_strtab_hash *tab;
1878 bfd_size_type index;
1880 /* An index of 0 always means the empty string. */
1881 if (str == 0 || *str == '\0')
1884 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1885 doesn't understand a hashed string table. */
1887 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1890 index = _bfd_stringtab_add (tab, str, hash, copy);
1892 if (index != (bfd_size_type) -1)
1894 /* Add BYTES_IN_WORD to the return value to account for the
1895 space taken up by the string table size. */
1896 index += BYTES_IN_WORD;
1902 /* Write out a strtab. ABFD is already at the right location in the
1906 emit_stringtab (abfd, tab)
1908 struct bfd_strtab_hash *tab;
1910 bfd_byte buffer[BYTES_IN_WORD];
1912 /* The string table starts with the size. */
1913 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1914 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1917 return _bfd_stringtab_emit (abfd, tab);
1921 NAME(aout,write_syms) (abfd)
1924 unsigned int count ;
1925 asymbol **generic = bfd_get_outsymbols (abfd);
1926 struct bfd_strtab_hash *strtab;
1928 strtab = _bfd_stringtab_init ();
1932 for (count = 0; count < bfd_get_symcount (abfd); count++)
1934 asymbol *g = generic[count];
1936 struct external_nlist nsp;
1938 indx = add_to_stringtab (abfd, strtab, g->name, false);
1939 if (indx == (bfd_size_type) -1)
1941 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1943 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
1945 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
1946 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
1947 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
1951 bfd_h_put_16(abfd,0, nsp.e_desc);
1952 bfd_h_put_8(abfd, 0, nsp.e_other);
1953 bfd_h_put_8(abfd, 0, nsp.e_type);
1956 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1959 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
1960 != EXTERNAL_NLIST_SIZE)
1963 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1964 here, at the end. */
1968 if (! emit_stringtab (abfd, strtab))
1971 _bfd_stringtab_free (strtab);
1976 _bfd_stringtab_free (strtab);
1982 NAME(aout,get_symtab) (abfd, location)
1986 unsigned int counter = 0;
1987 aout_symbol_type *symbase;
1989 if (!NAME(aout,slurp_symbol_table) (abfd))
1992 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
1993 *(location++) = (asymbol *) ( symbase++);
1995 return bfd_get_symcount (abfd);
1999 /* Standard reloc stuff */
2000 /* Output standard relocation information to a file in target byte order. */
2002 extern void NAME(aout,swap_std_reloc_out)
2003 PARAMS ((bfd *, arelent *, struct reloc_std_external *));
2006 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
2009 struct reloc_std_external *natptr;
2012 asymbol *sym = *(g->sym_ptr_ptr);
2014 unsigned int r_length;
2016 int r_baserel, r_jmptable, r_relative;
2017 asection *output_section = sym->section->output_section;
2019 PUT_WORD(abfd, g->address, natptr->r_address);
2021 r_length = g->howto->size ; /* Size as a power of two */
2022 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
2023 /* XXX This relies on relocs coming from a.out files. */
2024 r_baserel = (g->howto->type & 8) != 0;
2025 r_jmptable = (g->howto->type & 16) != 0;
2026 r_relative = (g->howto->type & 32) != 0;
2029 /* For a standard reloc, the addend is in the object file. */
2030 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
2033 /* name was clobbered by aout_write_syms to be symbol index */
2035 /* If this relocation is relative to a symbol then set the
2036 r_index to the symbols index, and the r_extern bit.
2038 Absolute symbols can come in in two ways, either as an offset
2039 from the abs section, or as a symbol which has an abs value.
2043 if (bfd_is_com_section (output_section)
2044 || bfd_is_abs_section (output_section)
2045 || bfd_is_und_section (output_section))
2047 if (bfd_abs_section_ptr->symbol == sym)
2049 /* Whoops, looked like an abs symbol, but is really an offset
2050 from the abs section */
2056 /* Fill in symbol */
2058 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2064 /* Just an ordinary section */
2066 r_index = output_section->target_index;
2069 /* now the fun stuff */
2070 if (bfd_header_big_endian (abfd)) {
2071 natptr->r_index[0] = r_index >> 16;
2072 natptr->r_index[1] = r_index >> 8;
2073 natptr->r_index[2] = r_index;
2075 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
2076 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
2077 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
2078 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
2079 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
2080 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
2082 natptr->r_index[2] = r_index >> 16;
2083 natptr->r_index[1] = r_index >> 8;
2084 natptr->r_index[0] = r_index;
2086 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
2087 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
2088 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
2089 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
2090 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2091 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2095 /* Extended stuff */
2096 /* Output extended relocation information to a file in target byte order. */
2098 extern void NAME(aout,swap_ext_reloc_out)
2099 PARAMS ((bfd *, arelent *, struct reloc_ext_external *));
2102 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2105 register struct reloc_ext_external *natptr;
2109 unsigned int r_type;
2110 unsigned int r_addend;
2111 asymbol *sym = *(g->sym_ptr_ptr);
2112 asection *output_section = sym->section->output_section;
2114 PUT_WORD (abfd, g->address, natptr->r_address);
2116 r_type = (unsigned int) g->howto->type;
2118 r_addend = g->addend;
2119 if ((sym->flags & BSF_SECTION_SYM) != 0)
2120 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2122 /* If this relocation is relative to a symbol then set the
2123 r_index to the symbols index, and the r_extern bit.
2125 Absolute symbols can come in in two ways, either as an offset
2126 from the abs section, or as a symbol which has an abs value.
2127 check for that here. */
2129 if (bfd_is_abs_section (bfd_get_section (sym)))
2134 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2136 if (bfd_is_und_section (bfd_get_section (sym))
2137 || (sym->flags & BSF_GLOBAL) != 0)
2141 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2145 /* Just an ordinary section */
2147 r_index = output_section->target_index;
2150 /* now the fun stuff */
2151 if (bfd_header_big_endian (abfd)) {
2152 natptr->r_index[0] = r_index >> 16;
2153 natptr->r_index[1] = r_index >> 8;
2154 natptr->r_index[2] = r_index;
2156 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2157 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2159 natptr->r_index[2] = r_index >> 16;
2160 natptr->r_index[1] = r_index >> 8;
2161 natptr->r_index[0] = r_index;
2163 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2164 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2167 PUT_WORD (abfd, r_addend, natptr->r_addend);
2170 /* BFD deals internally with all things based from the section they're
2171 in. so, something in 10 bytes into a text section with a base of
2172 50 would have a symbol (.text+10) and know .text vma was 50.
2174 Aout keeps all it's symbols based from zero, so the symbol would
2175 contain 60. This macro subs the base of each section from the value
2176 to give the true offset from the section */
2178 #define MOVE_ADDRESS(ad) \
2180 /* undefined symbol */ \
2181 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2182 cache_ptr->addend = ad; \
2184 /* defined, section relative. replace symbol with pointer to \
2185 symbol which points to section */ \
2186 switch (r_index) { \
2188 case N_TEXT | N_EXT: \
2189 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2190 cache_ptr->addend = ad - su->textsec->vma; \
2193 case N_DATA | N_EXT: \
2194 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2195 cache_ptr->addend = ad - su->datasec->vma; \
2198 case N_BSS | N_EXT: \
2199 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2200 cache_ptr->addend = ad - su->bsssec->vma; \
2204 case N_ABS | N_EXT: \
2205 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2206 cache_ptr->addend = ad; \
2212 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2214 struct reloc_ext_external *bytes;
2217 bfd_size_type symcount;
2219 unsigned int r_index;
2221 unsigned int r_type;
2222 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2224 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2226 /* now the fun stuff */
2227 if (bfd_header_big_endian (abfd)) {
2228 r_index = (bytes->r_index[0] << 16)
2229 | (bytes->r_index[1] << 8)
2230 | bytes->r_index[2];
2231 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2232 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2233 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2235 r_index = (bytes->r_index[2] << 16)
2236 | (bytes->r_index[1] << 8)
2237 | bytes->r_index[0];
2238 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2239 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2240 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2243 cache_ptr->howto = howto_table_ext + r_type;
2245 /* Base relative relocs are always against the symbol table,
2246 regardless of the setting of r_extern. r_extern just reflects
2247 whether the symbol the reloc is against is local or global. */
2248 if (r_type == RELOC_BASE10
2249 || r_type == RELOC_BASE13
2250 || r_type == RELOC_BASE22)
2253 if (r_extern && r_index > symcount)
2255 /* We could arrange to return an error, but it might be useful
2256 to see the file even if it is bad. */
2261 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2265 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2267 struct reloc_std_external *bytes;
2270 bfd_size_type symcount;
2272 unsigned int r_index;
2274 unsigned int r_length;
2276 int r_baserel, r_jmptable, r_relative;
2277 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2278 unsigned int howto_idx;
2280 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2282 /* now the fun stuff */
2283 if (bfd_header_big_endian (abfd)) {
2284 r_index = (bytes->r_index[0] << 16)
2285 | (bytes->r_index[1] << 8)
2286 | bytes->r_index[2];
2287 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2288 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2289 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2290 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2291 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2292 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2293 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2295 r_index = (bytes->r_index[2] << 16)
2296 | (bytes->r_index[1] << 8)
2297 | bytes->r_index[0];
2298 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2299 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2300 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2301 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2302 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2303 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2304 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2307 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2308 + 16 * r_jmptable + 32 * r_relative;
2309 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2310 cache_ptr->howto = howto_table_std + howto_idx;
2311 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2313 /* Base relative relocs are always against the symbol table,
2314 regardless of the setting of r_extern. r_extern just reflects
2315 whether the symbol the reloc is against is local or global. */
2319 if (r_extern && r_index > symcount)
2321 /* We could arrange to return an error, but it might be useful
2322 to see the file even if it is bad. */
2330 /* Read and swap the relocs for a section. */
2333 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2339 bfd_size_type reloc_size;
2341 arelent *reloc_cache;
2343 unsigned int counter = 0;
2346 if (asect->relocation)
2349 if (asect->flags & SEC_CONSTRUCTOR)
2352 if (asect == obj_datasec (abfd))
2353 reloc_size = exec_hdr(abfd)->a_drsize;
2354 else if (asect == obj_textsec (abfd))
2355 reloc_size = exec_hdr(abfd)->a_trsize;
2356 else if (asect == obj_bsssec (abfd))
2360 bfd_set_error (bfd_error_invalid_operation);
2364 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2367 each_size = obj_reloc_entry_size (abfd);
2369 count = reloc_size / each_size;
2371 reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent)));
2372 if (reloc_cache == NULL && count != 0)
2374 memset (reloc_cache, 0, count * sizeof (arelent));
2376 relocs = bfd_malloc ((size_t) reloc_size);
2377 if (relocs == NULL && reloc_size != 0)
2383 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2390 cache_ptr = reloc_cache;
2391 if (each_size == RELOC_EXT_SIZE)
2393 register struct reloc_ext_external *rptr =
2394 (struct reloc_ext_external *) relocs;
2396 for (; counter < count; counter++, rptr++, cache_ptr++)
2397 MY_swap_ext_reloc_in (abfd, rptr, cache_ptr, symbols,
2398 bfd_get_symcount (abfd));
2402 register struct reloc_std_external *rptr =
2403 (struct reloc_std_external *) relocs;
2405 for (; counter < count; counter++, rptr++, cache_ptr++)
2406 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2407 bfd_get_symcount (abfd));
2412 asect->relocation = reloc_cache;
2413 asect->reloc_count = cache_ptr - reloc_cache;
2418 /* Write out a relocation section into an object file. */
2421 NAME(aout,squirt_out_relocs) (abfd, section)
2426 unsigned char *native, *natptr;
2429 unsigned int count = section->reloc_count;
2432 if (count == 0 || section->orelocation == NULL)
2435 each_size = obj_reloc_entry_size (abfd);
2436 natsize = each_size * count;
2437 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2441 generic = section->orelocation;
2443 if (each_size == RELOC_EXT_SIZE)
2445 for (natptr = native;
2447 --count, natptr += each_size, ++generic)
2448 MY_swap_ext_reloc_out (abfd, *generic,
2449 (struct reloc_ext_external *) natptr);
2453 for (natptr = native;
2455 --count, natptr += each_size, ++generic)
2456 MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr);
2459 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
2460 bfd_release(abfd, native);
2463 bfd_release (abfd, native);
2468 /* This is stupid. This function should be a boolean predicate */
2470 NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2476 arelent *tblptr = section->relocation;
2479 if (section == obj_bsssec (abfd))
2485 if (!(tblptr || NAME(aout,slurp_reloc_table) (abfd, section, symbols)))
2488 if (section->flags & SEC_CONSTRUCTOR) {
2489 arelent_chain *chain = section->constructor_chain;
2490 for (count = 0; count < section->reloc_count; count ++) {
2491 *relptr ++ = &chain->relent;
2492 chain = chain->next;
2496 tblptr = section->relocation;
2498 for (count = 0; count++ < section->reloc_count;)
2500 *relptr++ = tblptr++;
2505 return section->reloc_count;
2509 NAME(aout,get_reloc_upper_bound) (abfd, asect)
2513 if (bfd_get_format (abfd) != bfd_object) {
2514 bfd_set_error (bfd_error_invalid_operation);
2517 if (asect->flags & SEC_CONSTRUCTOR) {
2518 return (sizeof (arelent *) * (asect->reloc_count+1));
2521 if (asect == obj_datasec (abfd))
2522 return (sizeof (arelent *)
2523 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
2526 if (asect == obj_textsec (abfd))
2527 return (sizeof (arelent *)
2528 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
2531 if (asect == obj_bsssec (abfd))
2532 return sizeof (arelent *);
2534 if (asect == obj_bsssec (abfd))
2537 bfd_set_error (bfd_error_invalid_operation);
2543 NAME(aout,get_symtab_upper_bound) (abfd)
2546 if (!NAME(aout,slurp_symbol_table) (abfd))
2549 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2553 NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
2554 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2555 asymbol *ignore_symbol ATTRIBUTE_UNUSED;
2557 return (alent *)NULL;
2561 NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
2562 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2566 bfd_symbol_info (symbol, ret);
2568 if (ret->type == '?')
2570 int type_code = aout_symbol(symbol)->type & 0xff;
2571 const char *stab_name = bfd_get_stab_name (type_code);
2572 static char buf[10];
2574 if (stab_name == NULL)
2576 sprintf (buf, "(%d)", type_code);
2580 ret->stab_type = type_code;
2581 ret->stab_other = (unsigned) (aout_symbol(symbol)->other & 0xff);
2582 ret->stab_desc = (unsigned) (aout_symbol(symbol)->desc & 0xffff);
2583 ret->stab_name = stab_name;
2588 NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
2589 bfd *ignore_abfd ATTRIBUTE_UNUSED;
2592 bfd_print_symbol_type how;
2594 FILE *file = (FILE *)afile;
2597 case bfd_print_symbol_name:
2599 fprintf (file,"%s", symbol->name);
2601 case bfd_print_symbol_more:
2602 fprintf (file,"%4x %2x %2x",(unsigned) (aout_symbol(symbol)->desc & 0xffff),
2603 (unsigned) (aout_symbol(symbol)->other & 0xff),
2604 (unsigned) (aout_symbol(symbol)->type));
2606 case bfd_print_symbol_all:
2608 CONST char *section_name = symbol->section->name;
2610 bfd_print_symbol_vandf((PTR)file,symbol);
2612 fprintf (file," %-5s %04x %02x %02x",
2614 (unsigned) (aout_symbol(symbol)->desc & 0xffff),
2615 (unsigned) (aout_symbol(symbol)->other & 0xff),
2616 (unsigned) (aout_symbol(symbol)->type & 0xff));
2618 fprintf (file," %s", symbol->name);
2624 /* If we don't have to allocate more than 1MB to hold the generic
2625 symbols, we use the generic minisymbol methord: it's faster, since
2626 it only translates the symbols once, not multiple times. */
2627 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2629 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2630 symbols. The minisymbol_to_symbol function translates these into
2631 BFD asymbol structures. */
2634 NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2638 unsigned int *sizep;
2642 /* We could handle the dynamic symbols here as well, but it's
2643 easier to hand them off. */
2644 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2647 if (! aout_get_external_symbols (abfd))
2650 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2651 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2653 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2655 /* By passing the external symbols back from this routine, we are
2656 giving up control over the memory block. Clear
2657 obj_aout_external_syms, so that we do not try to free it
2659 obj_aout_external_syms (abfd) = NULL;
2661 *sizep = EXTERNAL_NLIST_SIZE;
2662 return obj_aout_external_sym_count (abfd);
2665 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2666 unmodified a.out symbol. The SYM argument is a structure returned
2667 by bfd_make_empty_symbol, which we fill in here. */
2670 NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2677 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2678 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2680 memset (sym, 0, sizeof (aout_symbol_type));
2682 /* We call translate_symbol_table to translate a single symbol. */
2683 if (! (NAME(aout,translate_symbol_table)
2685 (aout_symbol_type *) sym,
2686 (struct external_nlist *) minisym,
2688 obj_aout_external_strings (abfd),
2689 obj_aout_external_string_size (abfd),
2697 provided a BFD, a section and an offset into the section, calculate
2698 and return the name of the source file and the line nearest to the
2703 NAME(aout,find_nearest_line)
2704 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2709 CONST char **filename_ptr;
2710 CONST char **functionname_ptr;
2711 unsigned int *line_ptr;
2713 /* Run down the file looking for the filename, function and linenumber */
2715 CONST char *directory_name = NULL;
2716 CONST char *main_file_name = NULL;
2717 CONST char *current_file_name = NULL;
2718 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2719 CONST char *line_directory_name = NULL; /* Value of directory_name at line number. */
2720 bfd_vma low_line_vma = 0;
2721 bfd_vma low_func_vma = 0;
2723 size_t filelen, funclen;
2726 *filename_ptr = abfd->filename;
2727 *functionname_ptr = 0;
2729 if (symbols != (asymbol **)NULL) {
2730 for (p = symbols; *p; p++) {
2731 aout_symbol_type *q = (aout_symbol_type *) (*p);
2735 /* If this looks like a file name symbol, and it comes after
2736 the line number we have found so far, but before the
2737 offset, then we have probably not found the right line
2739 if (q->symbol.value <= offset
2740 && ((q->symbol.value > low_line_vma
2741 && (line_file_name != NULL
2743 || (q->symbol.value > low_func_vma
2746 const char *symname;
2748 symname = q->symbol.name;
2749 if (strcmp (symname + strlen (symname) - 2, ".o") == 0)
2751 if (q->symbol.value > low_line_vma)
2754 line_file_name = NULL;
2756 if (q->symbol.value > low_func_vma)
2763 /* If this symbol is less than the offset, but greater than
2764 the line number we have found so far, then we have not
2765 found the right line number. */
2766 if (q->symbol.value <= offset)
2768 if (q->symbol.value > low_line_vma)
2771 line_file_name = NULL;
2773 if (q->symbol.value > low_func_vma)
2777 main_file_name = current_file_name = q->symbol.name;
2778 /* Look ahead to next symbol to check if that too is an N_SO. */
2782 q = (aout_symbol_type *) (*p);
2783 if (q->type != (int)N_SO)
2786 /* Found a second N_SO First is directory; second is filename. */
2787 directory_name = current_file_name;
2788 main_file_name = current_file_name = q->symbol.name;
2789 if (obj_textsec(abfd) != section)
2793 current_file_name = q->symbol.name;
2800 /* We'll keep this if it resolves nearer than the one we have
2802 if (q->symbol.value >= low_line_vma
2803 && q->symbol.value <= offset)
2805 *line_ptr = q->desc;
2806 low_line_vma = q->symbol.value;
2807 line_file_name = current_file_name;
2808 line_directory_name = directory_name;
2813 /* We'll keep this if it is nearer than the one we have already */
2814 if (q->symbol.value >= low_func_vma &&
2815 q->symbol.value <= offset) {
2816 low_func_vma = q->symbol.value;
2817 func = (asymbol *)q;
2819 else if (q->symbol.value > offset)
2830 main_file_name = line_file_name;
2831 directory_name = line_directory_name;
2834 if (main_file_name == NULL
2835 || IS_ABSOLUTE_PATH (main_file_name)
2836 || directory_name == NULL)
2839 filelen = strlen (directory_name) + strlen (main_file_name);
2843 funclen = strlen (bfd_asymbol_name (func));
2845 if (adata (abfd).line_buf != NULL)
2846 free (adata (abfd).line_buf);
2847 if (filelen + funclen == 0)
2848 adata (abfd).line_buf = buf = NULL;
2851 buf = (char *) bfd_malloc (filelen + funclen + 3);
2852 adata (abfd).line_buf = buf;
2857 if (main_file_name != NULL)
2859 if (IS_ABSOLUTE_PATH (main_file_name) || directory_name == NULL)
2860 *filename_ptr = main_file_name;
2863 sprintf (buf, "%s%s", directory_name, main_file_name);
2864 *filename_ptr = buf;
2871 const char *function = func->name;
2874 /* The caller expects a symbol name. We actually have a
2875 function name, without the leading underscore. Put the
2876 underscore back in, so that the caller gets a symbol name. */
2877 if (bfd_get_symbol_leading_char (abfd) == '\0')
2878 strcpy (buf, function);
2881 buf[0] = bfd_get_symbol_leading_char (abfd);
2882 strcpy (buf + 1, function);
2884 /* Have to remove : stuff */
2885 p = strchr (buf, ':');
2888 *functionname_ptr = buf;
2895 NAME(aout,sizeof_headers) (abfd, execable)
2897 boolean execable ATTRIBUTE_UNUSED;
2899 return adata(abfd).exec_bytes_size;
2902 /* Free all information we have cached for this BFD. We can always
2903 read it again later if we need it. */
2906 NAME(aout,bfd_free_cached_info) (abfd)
2911 if (bfd_get_format (abfd) != bfd_object)
2914 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2915 BFCI_FREE (obj_aout_symbols (abfd));
2917 obj_aout_external_syms (abfd) = 0;
2918 bfd_free_window (&obj_aout_sym_window (abfd));
2919 bfd_free_window (&obj_aout_string_window (abfd));
2920 obj_aout_external_strings (abfd) = 0;
2922 BFCI_FREE (obj_aout_external_syms (abfd));
2923 BFCI_FREE (obj_aout_external_strings (abfd));
2925 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2926 BFCI_FREE (o->relocation);
2932 /* a.out link code. */
2934 static boolean aout_link_add_object_symbols
2935 PARAMS ((bfd *, struct bfd_link_info *));
2936 static boolean aout_link_check_archive_element
2937 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2938 static boolean aout_link_free_symbols PARAMS ((bfd *));
2939 static boolean aout_link_check_ar_symbols
2940 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2941 static boolean aout_link_add_symbols
2942 PARAMS ((bfd *, struct bfd_link_info *));
2944 /* Routine to create an entry in an a.out link hash table. */
2946 struct bfd_hash_entry *
2947 NAME(aout,link_hash_newfunc) (entry, table, string)
2948 struct bfd_hash_entry *entry;
2949 struct bfd_hash_table *table;
2952 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2954 /* Allocate the structure if it has not already been allocated by a
2956 if (ret == (struct aout_link_hash_entry *) NULL)
2957 ret = ((struct aout_link_hash_entry *)
2958 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2959 if (ret == (struct aout_link_hash_entry *) NULL)
2960 return (struct bfd_hash_entry *) ret;
2962 /* Call the allocation method of the superclass. */
2963 ret = ((struct aout_link_hash_entry *)
2964 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2968 /* Set local fields. */
2969 ret->written = false;
2973 return (struct bfd_hash_entry *) ret;
2976 /* Initialize an a.out link hash table. */
2979 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2980 struct aout_link_hash_table *table;
2982 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2983 struct bfd_hash_table *,
2986 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2989 /* Create an a.out link hash table. */
2991 struct bfd_link_hash_table *
2992 NAME(aout,link_hash_table_create) (abfd)
2995 struct aout_link_hash_table *ret;
2997 ret = ((struct aout_link_hash_table *)
2998 bfd_alloc (abfd, sizeof (struct aout_link_hash_table)));
3000 return (struct bfd_link_hash_table *) NULL;
3001 if (! NAME(aout,link_hash_table_init) (ret, abfd,
3002 NAME(aout,link_hash_newfunc)))
3005 return (struct bfd_link_hash_table *) NULL;
3010 /* Given an a.out BFD, add symbols to the global hash table as
3014 NAME(aout,link_add_symbols) (abfd, info)
3016 struct bfd_link_info *info;
3018 switch (bfd_get_format (abfd))
3021 return aout_link_add_object_symbols (abfd, info);
3023 return _bfd_generic_link_add_archive_symbols
3024 (abfd, info, aout_link_check_archive_element);
3026 bfd_set_error (bfd_error_wrong_format);
3031 /* Add symbols from an a.out object file. */
3034 aout_link_add_object_symbols (abfd, info)
3036 struct bfd_link_info *info;
3038 if (! aout_get_external_symbols (abfd))
3040 if (! aout_link_add_symbols (abfd, info))
3042 if (! info->keep_memory)
3044 if (! aout_link_free_symbols (abfd))
3050 /* Check a single archive element to see if we need to include it in
3051 the link. *PNEEDED is set according to whether this element is
3052 needed in the link or not. This is called from
3053 _bfd_generic_link_add_archive_symbols. */
3056 aout_link_check_archive_element (abfd, info, pneeded)
3058 struct bfd_link_info *info;
3061 if (! aout_get_external_symbols (abfd))
3064 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
3069 if (! aout_link_add_symbols (abfd, info))
3073 if (! info->keep_memory || ! *pneeded)
3075 if (! aout_link_free_symbols (abfd))
3082 /* Free up the internal symbols read from an a.out file. */
3085 aout_link_free_symbols (abfd)
3088 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
3091 bfd_free_window (&obj_aout_sym_window (abfd));
3093 free ((PTR) obj_aout_external_syms (abfd));
3095 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
3097 if (obj_aout_external_strings (abfd) != (char *) NULL)
3100 bfd_free_window (&obj_aout_string_window (abfd));
3102 free ((PTR) obj_aout_external_strings (abfd));
3104 obj_aout_external_strings (abfd) = (char *) NULL;
3109 /* Look through the internal symbols to see if this object file should
3110 be included in the link. We should include this object file if it
3111 defines any symbols which are currently undefined. If this object
3112 file defines a common symbol, then we may adjust the size of the
3113 known symbol but we do not include the object file in the link
3114 (unless there is some other reason to include it). */
3117 aout_link_check_ar_symbols (abfd, info, pneeded)
3119 struct bfd_link_info *info;
3122 register struct external_nlist *p;
3123 struct external_nlist *pend;
3128 /* Look through all the symbols. */
3129 p = obj_aout_external_syms (abfd);
3130 pend = p + obj_aout_external_sym_count (abfd);
3131 strings = obj_aout_external_strings (abfd);
3132 for (; p < pend; p++)
3134 int type = bfd_h_get_8 (abfd, p->e_type);
3136 struct bfd_link_hash_entry *h;
3138 /* Ignore symbols that are not externally visible. This is an
3139 optimization only, as we check the type more thoroughly
3141 if (((type & N_EXT) == 0
3142 || (type & N_STAB) != 0
3149 if (type == N_WARNING
3155 name = strings + GET_WORD (abfd, p->e_strx);
3156 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3158 /* We are only interested in symbols that are currently
3159 undefined or common. */
3160 if (h == (struct bfd_link_hash_entry *) NULL
3161 || (h->type != bfd_link_hash_undefined
3162 && h->type != bfd_link_hash_common))
3164 if (type == (N_INDR | N_EXT))
3169 if (type == (N_TEXT | N_EXT)
3170 || type == (N_DATA | N_EXT)
3171 || type == (N_BSS | N_EXT)
3172 || type == (N_ABS | N_EXT)
3173 || type == (N_INDR | N_EXT))
3175 /* This object file defines this symbol. We must link it
3176 in. This is true regardless of whether the current
3177 definition of the symbol is undefined or common. If the
3178 current definition is common, we have a case in which we
3179 have already seen an object file including
3181 and this object file from the archive includes
3183 In such a case we must include this object file.
3185 FIXME: The SunOS 4.1.3 linker will pull in the archive
3186 element if the symbol is defined in the .data section,
3187 but not if it is defined in the .text section. That
3188 seems a bit crazy to me, and I haven't implemented it.
3189 However, it might be correct. */
3190 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3196 if (type == (N_UNDF | N_EXT))
3200 value = GET_WORD (abfd, p->e_value);
3203 /* This symbol is common in the object from the archive
3205 if (h->type == bfd_link_hash_undefined)
3210 symbfd = h->u.undef.abfd;
3211 if (symbfd == (bfd *) NULL)
3213 /* This symbol was created as undefined from
3214 outside BFD. We assume that we should link
3215 in the object file. This is done for the -u
3216 option in the linker. */
3217 if (! (*info->callbacks->add_archive_element) (info,
3224 /* Turn the current link symbol into a common
3225 symbol. It is already on the undefs list. */
3226 h->type = bfd_link_hash_common;
3227 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3228 bfd_hash_allocate (&info->hash->table,
3229 sizeof (struct bfd_link_hash_common_entry)));
3230 if (h->u.c.p == NULL)
3233 h->u.c.size = value;
3235 /* FIXME: This isn't quite right. The maximum
3236 alignment of a common symbol should be set by the
3237 architecture of the output file, not of the input
3239 power = bfd_log2 (value);
3240 if (power > bfd_get_arch_info (abfd)->section_align_power)
3241 power = bfd_get_arch_info (abfd)->section_align_power;
3242 h->u.c.p->alignment_power = power;
3244 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3249 /* Adjust the size of the common symbol if
3251 if (value > h->u.c.size)
3252 h->u.c.size = value;
3262 /* This symbol is weak but defined. We must pull it in if
3263 the current link symbol is undefined, but we don't want
3264 it if the current link symbol is common. */
3265 if (h->type == bfd_link_hash_undefined)
3267 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3275 /* We do not need this object file. */
3279 /* Add all symbols from an object file to the hash table. */
3282 aout_link_add_symbols (abfd, info)
3284 struct bfd_link_info *info;
3286 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3287 const char *, flagword, asection *,
3288 bfd_vma, const char *, boolean,
3290 struct bfd_link_hash_entry **));
3291 struct external_nlist *syms;
3292 bfd_size_type sym_count;
3295 struct aout_link_hash_entry **sym_hash;
3296 register struct external_nlist *p;
3297 struct external_nlist *pend;
3299 syms = obj_aout_external_syms (abfd);
3300 sym_count = obj_aout_external_sym_count (abfd);
3301 strings = obj_aout_external_strings (abfd);
3302 if (info->keep_memory)
3307 if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3309 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3310 (abfd, info, &syms, &sym_count, &strings)))
3314 /* We keep a list of the linker hash table entries that correspond
3315 to particular symbols. We could just look them up in the hash
3316 table, but keeping the list is more efficient. Perhaps this
3317 should be conditional on info->keep_memory. */
3318 sym_hash = ((struct aout_link_hash_entry **)
3321 * sizeof (struct aout_link_hash_entry *))));
3322 if (sym_hash == NULL && sym_count != 0)
3324 obj_aout_sym_hashes (abfd) = sym_hash;
3326 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3327 if (add_one_symbol == NULL)
3328 add_one_symbol = _bfd_generic_link_add_one_symbol;
3331 pend = p + sym_count;
3332 for (; p < pend; p++, sym_hash++)
3343 type = bfd_h_get_8 (abfd, p->e_type);
3345 /* Ignore debugging symbols. */
3346 if ((type & N_STAB) != 0)
3349 name = strings + GET_WORD (abfd, p->e_strx);
3350 value = GET_WORD (abfd, p->e_value);
3367 /* Ignore symbols that are not externally visible. */
3370 /* Ignore local indirect symbol. */
3375 case N_UNDF | N_EXT:
3378 section = bfd_und_section_ptr;
3382 section = bfd_com_section_ptr;
3385 section = bfd_abs_section_ptr;
3387 case N_TEXT | N_EXT:
3388 section = obj_textsec (abfd);
3389 value -= bfd_get_section_vma (abfd, section);
3391 case N_DATA | N_EXT:
3392 case N_SETV | N_EXT:
3393 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3394 translate_from_native_sym_flags. */
3395 section = obj_datasec (abfd);
3396 value -= bfd_get_section_vma (abfd, section);
3399 section = obj_bsssec (abfd);
3400 value -= bfd_get_section_vma (abfd, section);
3402 case N_INDR | N_EXT:
3403 /* An indirect symbol. The next symbol is the symbol
3404 which this one really is. */
3405 BFD_ASSERT (p + 1 < pend);
3407 string = strings + GET_WORD (abfd, p->e_strx);
3408 section = bfd_ind_section_ptr;
3409 flags |= BSF_INDIRECT;
3411 case N_COMM | N_EXT:
3412 section = bfd_com_section_ptr;
3414 case N_SETA: case N_SETA | N_EXT:
3415 section = bfd_abs_section_ptr;
3416 flags |= BSF_CONSTRUCTOR;
3418 case N_SETT: case N_SETT | N_EXT:
3419 section = obj_textsec (abfd);
3420 flags |= BSF_CONSTRUCTOR;
3421 value -= bfd_get_section_vma (abfd, section);
3423 case N_SETD: case N_SETD | N_EXT:
3424 section = obj_datasec (abfd);
3425 flags |= BSF_CONSTRUCTOR;
3426 value -= bfd_get_section_vma (abfd, section);
3428 case N_SETB: case N_SETB | N_EXT:
3429 section = obj_bsssec (abfd);
3430 flags |= BSF_CONSTRUCTOR;
3431 value -= bfd_get_section_vma (abfd, section);
3434 /* A warning symbol. The next symbol is the one to warn
3436 BFD_ASSERT (p + 1 < pend);
3439 name = strings + GET_WORD (abfd, p->e_strx);
3440 section = bfd_und_section_ptr;
3441 flags |= BSF_WARNING;
3444 section = bfd_und_section_ptr;
3448 section = bfd_abs_section_ptr;
3452 section = obj_textsec (abfd);
3453 value -= bfd_get_section_vma (abfd, section);
3457 section = obj_datasec (abfd);
3458 value -= bfd_get_section_vma (abfd, section);
3462 section = obj_bsssec (abfd);
3463 value -= bfd_get_section_vma (abfd, section);
3468 if (! ((*add_one_symbol)
3469 (info, abfd, name, flags, section, value, string, copy, false,
3470 (struct bfd_link_hash_entry **) sym_hash)))
3473 /* Restrict the maximum alignment of a common symbol based on
3474 the architecture, since a.out has no way to represent
3475 alignment requirements of a section in a .o file. FIXME:
3476 This isn't quite right: it should use the architecture of the
3477 output file, not the input files. */
3478 if ((*sym_hash)->root.type == bfd_link_hash_common
3479 && ((*sym_hash)->root.u.c.p->alignment_power >
3480 bfd_get_arch_info (abfd)->section_align_power))
3481 (*sym_hash)->root.u.c.p->alignment_power =
3482 bfd_get_arch_info (abfd)->section_align_power;
3484 /* If this is a set symbol, and we are not building sets, then
3485 it is possible for the hash entry to not have been set. In
3486 such a case, treat the symbol as not globally defined. */
3487 if ((*sym_hash)->root.type == bfd_link_hash_new)
3489 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3493 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3500 /* A hash table used for header files with N_BINCL entries. */
3502 struct aout_link_includes_table
3504 struct bfd_hash_table root;
3507 /* A linked list of totals that we have found for a particular header
3510 struct aout_link_includes_totals
3512 struct aout_link_includes_totals *next;
3516 /* An entry in the header file hash table. */
3518 struct aout_link_includes_entry
3520 struct bfd_hash_entry root;
3521 /* List of totals we have found for this file. */
3522 struct aout_link_includes_totals *totals;
3525 /* Look up an entry in an the header file hash table. */
3527 #define aout_link_includes_lookup(table, string, create, copy) \
3528 ((struct aout_link_includes_entry *) \
3529 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3531 /* During the final link step we need to pass around a bunch of
3532 information, so we do it in an instance of this structure. */
3534 struct aout_final_link_info
3536 /* General link information. */
3537 struct bfd_link_info *info;
3540 /* Reloc file positions. */
3541 file_ptr treloff, dreloff;
3542 /* File position of symbols. */
3545 struct bfd_strtab_hash *strtab;
3546 /* Header file hash table. */
3547 struct aout_link_includes_table includes;
3548 /* A buffer large enough to hold the contents of any section. */
3550 /* A buffer large enough to hold the relocs of any section. */
3552 /* A buffer large enough to hold the symbol map of any input BFD. */
3554 /* A buffer large enough to hold output symbols of any input BFD. */
3555 struct external_nlist *output_syms;
3558 static struct bfd_hash_entry *aout_link_includes_newfunc
3559 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
3560 static boolean aout_link_input_bfd
3561 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3562 static boolean aout_link_write_symbols
3563 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3564 static boolean aout_link_write_other_symbol
3565 PARAMS ((struct aout_link_hash_entry *, PTR));
3566 static boolean aout_link_input_section
3567 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3568 asection *input_section, file_ptr *reloff_ptr,
3569 bfd_size_type rel_size));
3570 static boolean aout_link_input_section_std
3571 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3572 asection *input_section, struct reloc_std_external *,
3573 bfd_size_type rel_size, bfd_byte *contents));
3574 static boolean aout_link_input_section_ext
3575 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3576 asection *input_section, struct reloc_ext_external *,
3577 bfd_size_type rel_size, bfd_byte *contents));
3578 static INLINE asection *aout_reloc_index_to_section
3579 PARAMS ((bfd *, int));
3580 static boolean aout_link_reloc_link_order
3581 PARAMS ((struct aout_final_link_info *, asection *,
3582 struct bfd_link_order *));
3584 /* The function to create a new entry in the header file hash table. */
3586 static struct bfd_hash_entry *
3587 aout_link_includes_newfunc (entry, table, string)
3588 struct bfd_hash_entry *entry;
3589 struct bfd_hash_table *table;
3592 struct aout_link_includes_entry *ret =
3593 (struct aout_link_includes_entry *) entry;
3595 /* Allocate the structure if it has not already been allocated by a
3597 if (ret == (struct aout_link_includes_entry *) NULL)
3598 ret = ((struct aout_link_includes_entry *)
3599 bfd_hash_allocate (table,
3600 sizeof (struct aout_link_includes_entry)));
3601 if (ret == (struct aout_link_includes_entry *) NULL)
3602 return (struct bfd_hash_entry *) ret;
3604 /* Call the allocation method of the superclass. */
3605 ret = ((struct aout_link_includes_entry *)
3606 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3609 /* Set local fields. */
3613 return (struct bfd_hash_entry *) ret;
3616 /* Do the final link step. This is called on the output BFD. The
3617 INFO structure should point to a list of BFDs linked through the
3618 link_next field which can be used to find each BFD which takes part
3619 in the output. Also, each section in ABFD should point to a list
3620 of bfd_link_order structures which list all the input sections for
3621 the output section. */
3624 NAME(aout,final_link) (abfd, info, callback)
3626 struct bfd_link_info *info;
3627 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3629 struct aout_final_link_info aout_info;
3630 boolean includes_hash_initialized = false;
3632 bfd_size_type trsize, drsize;
3633 size_t max_contents_size;
3634 size_t max_relocs_size;
3635 size_t max_sym_count;
3636 bfd_size_type text_size;
3638 register struct bfd_link_order *p;
3640 boolean have_link_order_relocs;
3643 abfd->flags |= DYNAMIC;
3645 aout_info.info = info;
3646 aout_info.output_bfd = abfd;
3647 aout_info.contents = NULL;
3648 aout_info.relocs = NULL;
3649 aout_info.symbol_map = NULL;
3650 aout_info.output_syms = NULL;
3652 if (! bfd_hash_table_init_n (&aout_info.includes.root,
3653 aout_link_includes_newfunc,
3656 includes_hash_initialized = true;
3658 /* Figure out the largest section size. Also, if generating
3659 relocateable output, count the relocs. */
3662 max_contents_size = 0;
3663 max_relocs_size = 0;
3665 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3669 if (info->relocateable)
3671 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3673 trsize += exec_hdr (sub)->a_trsize;
3674 drsize += exec_hdr (sub)->a_drsize;
3678 /* FIXME: We need to identify the .text and .data sections
3679 and call get_reloc_upper_bound and canonicalize_reloc to
3680 work out the number of relocs needed, and then multiply
3681 by the reloc size. */
3682 (*_bfd_error_handler)
3683 (_("%s: relocateable link from %s to %s not supported"),
3684 bfd_get_filename (abfd),
3685 sub->xvec->name, abfd->xvec->name);
3686 bfd_set_error (bfd_error_invalid_operation);
3691 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3693 sz = bfd_section_size (sub, obj_textsec (sub));
3694 if (sz > max_contents_size)
3695 max_contents_size = sz;
3696 sz = bfd_section_size (sub, obj_datasec (sub));
3697 if (sz > max_contents_size)
3698 max_contents_size = sz;
3700 sz = exec_hdr (sub)->a_trsize;
3701 if (sz > max_relocs_size)
3702 max_relocs_size = sz;
3703 sz = exec_hdr (sub)->a_drsize;
3704 if (sz > max_relocs_size)
3705 max_relocs_size = sz;
3707 sz = obj_aout_external_sym_count (sub);
3708 if (sz > max_sym_count)
3713 if (info->relocateable)
3715 if (obj_textsec (abfd) != (asection *) NULL)
3716 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3718 * obj_reloc_entry_size (abfd));
3719 if (obj_datasec (abfd) != (asection *) NULL)
3720 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3722 * obj_reloc_entry_size (abfd));
3725 exec_hdr (abfd)->a_trsize = trsize;
3726 exec_hdr (abfd)->a_drsize = drsize;
3728 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3730 /* Adjust the section sizes and vmas according to the magic number.
3731 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3732 filepos for each section. */
3733 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3736 /* The relocation and symbol file positions differ among a.out
3737 targets. We are passed a callback routine from the backend
3738 specific code to handle this.
3739 FIXME: At this point we do not know how much space the symbol
3740 table will require. This will not work for any (nonstandard)
3741 a.out target that needs to know the symbol table size before it
3742 can compute the relocation file positions. This may or may not
3743 be the case for the hp300hpux target, for example. */
3744 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3746 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3747 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3748 obj_sym_filepos (abfd) = aout_info.symoff;
3750 /* We keep a count of the symbols as we output them. */
3751 obj_aout_external_sym_count (abfd) = 0;
3753 /* We accumulate the string table as we write out the symbols. */
3754 aout_info.strtab = _bfd_stringtab_init ();
3755 if (aout_info.strtab == NULL)
3758 /* Allocate buffers to hold section contents and relocs. */
3759 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3760 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3761 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3762 aout_info.output_syms = ((struct external_nlist *)
3763 bfd_malloc ((max_sym_count + 1)
3764 * sizeof (struct external_nlist)));
3765 if ((aout_info.contents == NULL && max_contents_size != 0)
3766 || (aout_info.relocs == NULL && max_relocs_size != 0)
3767 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3768 || aout_info.output_syms == NULL)
3771 /* If we have a symbol named __DYNAMIC, force it out now. This is
3772 required by SunOS. Doing this here rather than in sunos.c is a
3773 hack, but it's easier than exporting everything which would be
3776 struct aout_link_hash_entry *h;
3778 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3779 false, false, false);
3781 aout_link_write_other_symbol (h, &aout_info);
3784 /* The most time efficient way to do the link would be to read all
3785 the input object files into memory and then sort out the
3786 information into the output file. Unfortunately, that will
3787 probably use too much memory. Another method would be to step
3788 through everything that composes the text section and write it
3789 out, and then everything that composes the data section and write
3790 it out, and then write out the relocs, and then write out the
3791 symbols. Unfortunately, that requires reading stuff from each
3792 input file several times, and we will not be able to keep all the
3793 input files open simultaneously, and reopening them will be slow.
3795 What we do is basically process one input file at a time. We do
3796 everything we need to do with an input file once--copy over the
3797 section contents, handle the relocation information, and write
3798 out the symbols--and then we throw away the information we read
3799 from it. This approach requires a lot of lseeks of the output
3800 file, which is unfortunate but still faster than reopening a lot
3803 We use the output_has_begun field of the input BFDs to see
3804 whether we have already handled it. */
3805 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3806 sub->output_has_begun = false;
3808 /* Mark all sections which are to be included in the link. This
3809 will normally be every section. We need to do this so that we
3810 can identify any sections which the linker has decided to not
3812 for (o = abfd->sections; o != NULL; o = o->next)
3814 for (p = o->link_order_head; p != NULL; p = p->next)
3816 if (p->type == bfd_indirect_link_order)
3817 p->u.indirect.section->linker_mark = true;
3821 have_link_order_relocs = false;
3822 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3824 for (p = o->link_order_head;
3825 p != (struct bfd_link_order *) NULL;
3828 if (p->type == bfd_indirect_link_order
3829 && (bfd_get_flavour (p->u.indirect.section->owner)
3830 == bfd_target_aout_flavour))
3834 input_bfd = p->u.indirect.section->owner;
3835 if (! input_bfd->output_has_begun)
3837 if (! aout_link_input_bfd (&aout_info, input_bfd))
3839 input_bfd->output_has_begun = true;
3842 else if (p->type == bfd_section_reloc_link_order
3843 || p->type == bfd_symbol_reloc_link_order)
3845 /* These are handled below. */
3846 have_link_order_relocs = true;
3850 if (! _bfd_default_link_order (abfd, info, o, p))
3856 /* Write out any symbols that we have not already written out. */
3857 aout_link_hash_traverse (aout_hash_table (info),
3858 aout_link_write_other_symbol,
3861 /* Now handle any relocs we were asked to create by the linker.
3862 These did not come from any input file. We must do these after
3863 we have written out all the symbols, so that we know the symbol
3865 if (have_link_order_relocs)
3867 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3869 for (p = o->link_order_head;
3870 p != (struct bfd_link_order *) NULL;
3873 if (p->type == bfd_section_reloc_link_order
3874 || p->type == bfd_symbol_reloc_link_order)
3876 if (! aout_link_reloc_link_order (&aout_info, o, p))
3883 if (aout_info.contents != NULL)
3885 free (aout_info.contents);
3886 aout_info.contents = NULL;
3888 if (aout_info.relocs != NULL)
3890 free (aout_info.relocs);
3891 aout_info.relocs = NULL;
3893 if (aout_info.symbol_map != NULL)
3895 free (aout_info.symbol_map);
3896 aout_info.symbol_map = NULL;
3898 if (aout_info.output_syms != NULL)
3900 free (aout_info.output_syms);
3901 aout_info.output_syms = NULL;
3903 if (includes_hash_initialized)
3905 bfd_hash_table_free (&aout_info.includes.root);
3906 includes_hash_initialized = false;
3909 /* Finish up any dynamic linking we may be doing. */
3910 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3912 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3916 /* Update the header information. */
3917 abfd->symcount = obj_aout_external_sym_count (abfd);
3918 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3919 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3920 obj_textsec (abfd)->reloc_count =
3921 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3922 obj_datasec (abfd)->reloc_count =
3923 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3925 /* Write out the string table, unless there are no symbols. */
3926 if (abfd->symcount > 0)
3928 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
3929 || ! emit_stringtab (abfd, aout_info.strtab))
3932 else if (obj_textsec (abfd)->reloc_count == 0
3933 && obj_datasec (abfd)->reloc_count == 0)
3939 (obj_datasec (abfd)->filepos
3940 + exec_hdr (abfd)->a_data
3943 || bfd_write (&b, 1, 1, abfd) != 1)
3950 if (aout_info.contents != NULL)
3951 free (aout_info.contents);
3952 if (aout_info.relocs != NULL)
3953 free (aout_info.relocs);
3954 if (aout_info.symbol_map != NULL)
3955 free (aout_info.symbol_map);
3956 if (aout_info.output_syms != NULL)
3957 free (aout_info.output_syms);
3958 if (includes_hash_initialized)
3959 bfd_hash_table_free (&aout_info.includes.root);
3963 /* Link an a.out input BFD into the output file. */
3966 aout_link_input_bfd (finfo, input_bfd)
3967 struct aout_final_link_info *finfo;
3970 bfd_size_type sym_count;
3972 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3974 /* If this is a dynamic object, it may need special handling. */
3975 if ((input_bfd->flags & DYNAMIC) != 0
3976 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3978 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3979 (finfo->info, input_bfd));
3982 /* Get the symbols. We probably have them already, unless
3983 finfo->info->keep_memory is false. */
3984 if (! aout_get_external_symbols (input_bfd))
3987 sym_count = obj_aout_external_sym_count (input_bfd);
3989 /* Write out the symbols and get a map of the new indices. The map
3990 is placed into finfo->symbol_map. */
3991 if (! aout_link_write_symbols (finfo, input_bfd))
3994 /* Relocate and write out the sections. These functions use the
3995 symbol map created by aout_link_write_symbols. The linker_mark
3996 field will be set if these sections are to be included in the
3997 link, which will normally be the case. */
3998 if (obj_textsec (input_bfd)->linker_mark)
4000 if (! aout_link_input_section (finfo, input_bfd,
4001 obj_textsec (input_bfd),
4003 exec_hdr (input_bfd)->a_trsize))
4006 if (obj_datasec (input_bfd)->linker_mark)
4008 if (! aout_link_input_section (finfo, input_bfd,
4009 obj_datasec (input_bfd),
4011 exec_hdr (input_bfd)->a_drsize))
4015 /* If we are not keeping memory, we don't need the symbols any
4016 longer. We still need them if we are keeping memory, because the
4017 strings in the hash table point into them. */
4018 if (! finfo->info->keep_memory)
4020 if (! aout_link_free_symbols (input_bfd))
4027 /* Adjust and write out the symbols for an a.out file. Set the new
4028 symbol indices into a symbol_map. */
4031 aout_link_write_symbols (finfo, input_bfd)
4032 struct aout_final_link_info *finfo;
4036 bfd_size_type sym_count;
4038 enum bfd_link_strip strip;
4039 enum bfd_link_discard discard;
4040 struct external_nlist *outsym;
4041 bfd_size_type strtab_index;
4042 register struct external_nlist *sym;
4043 struct external_nlist *sym_end;
4044 struct aout_link_hash_entry **sym_hash;
4049 output_bfd = finfo->output_bfd;
4050 sym_count = obj_aout_external_sym_count (input_bfd);
4051 strings = obj_aout_external_strings (input_bfd);
4052 strip = finfo->info->strip;
4053 discard = finfo->info->discard;
4054 outsym = finfo->output_syms;
4056 /* First write out a symbol for this object file, unless we are
4057 discarding such symbols. */
4058 if (strip != strip_all
4059 && (strip != strip_some
4060 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
4061 false, false) != NULL)
4062 && discard != discard_all)
4064 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
4065 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
4066 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
4067 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4068 input_bfd->filename, false);
4069 if (strtab_index == (bfd_size_type) -1)
4071 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4072 PUT_WORD (output_bfd,
4073 (bfd_get_section_vma (output_bfd,
4074 obj_textsec (input_bfd)->output_section)
4075 + obj_textsec (input_bfd)->output_offset),
4077 ++obj_aout_external_sym_count (output_bfd);
4083 sym = obj_aout_external_syms (input_bfd);
4084 sym_end = sym + sym_count;
4085 sym_hash = obj_aout_sym_hashes (input_bfd);
4086 symbol_map = finfo->symbol_map;
4087 memset (symbol_map, 0, sym_count * sizeof *symbol_map);
4088 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
4092 struct aout_link_hash_entry *h;
4098 /* We set *symbol_map to 0 above for all symbols. If it has
4099 already been set to -1 for this symbol, it means that we are
4100 discarding it because it appears in a duplicate header file.
4101 See the N_BINCL code below. */
4102 if (*symbol_map == -1)
4105 /* Initialize *symbol_map to -1, which means that the symbol was
4106 not copied into the output file. We will change it later if
4107 we do copy the symbol over. */
4110 type = bfd_h_get_8 (input_bfd, sym->e_type);
4111 name = strings + GET_WORD (input_bfd, sym->e_strx);
4117 /* Pass this symbol through. It is the target of an
4118 indirect or warning symbol. */
4119 val = GET_WORD (input_bfd, sym->e_value);
4124 /* Skip this symbol, which is the target of an indirect
4125 symbol that we have changed to no longer be an indirect
4132 struct aout_link_hash_entry *hresolve;
4134 /* We have saved the hash table entry for this symbol, if
4135 there is one. Note that we could just look it up again
4136 in the hash table, provided we first check that it is an
4140 /* Use the name from the hash table, in case the symbol was
4143 name = h->root.root.string;
4145 /* If this is an indirect or warning symbol, then change
4146 hresolve to the base symbol. We also change *sym_hash so
4147 that the relocation routines relocate against the real
4150 if (h != (struct aout_link_hash_entry *) NULL
4151 && (h->root.type == bfd_link_hash_indirect
4152 || h->root.type == bfd_link_hash_warning))
4154 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4155 while (hresolve->root.type == bfd_link_hash_indirect
4156 || hresolve->root.type == bfd_link_hash_warning)
4157 hresolve = ((struct aout_link_hash_entry *)
4158 hresolve->root.u.i.link);
4159 *sym_hash = hresolve;
4162 /* If the symbol has already been written out, skip it. */
4163 if (h != (struct aout_link_hash_entry *) NULL
4164 && h->root.type != bfd_link_hash_warning
4167 if ((type & N_TYPE) == N_INDR
4168 || type == N_WARNING)
4170 *symbol_map = h->indx;
4174 /* See if we are stripping this symbol. */
4180 case strip_debugger:
4181 if ((type & N_STAB) != 0)
4185 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
4195 if (h != (struct aout_link_hash_entry *) NULL)
4200 /* Get the value of the symbol. */
4201 if ((type & N_TYPE) == N_TEXT
4203 symsec = obj_textsec (input_bfd);
4204 else if ((type & N_TYPE) == N_DATA
4206 symsec = obj_datasec (input_bfd);
4207 else if ((type & N_TYPE) == N_BSS
4209 symsec = obj_bsssec (input_bfd);
4210 else if ((type & N_TYPE) == N_ABS
4212 symsec = bfd_abs_section_ptr;
4213 else if (((type & N_TYPE) == N_INDR
4214 && (hresolve == (struct aout_link_hash_entry *) NULL
4215 || (hresolve->root.type != bfd_link_hash_defined
4216 && hresolve->root.type != bfd_link_hash_defweak
4217 && hresolve->root.type != bfd_link_hash_common)))
4218 || type == N_WARNING)
4220 /* Pass the next symbol through unchanged. The
4221 condition above for indirect symbols is so that if
4222 the indirect symbol was defined, we output it with
4223 the correct definition so the debugger will
4226 val = GET_WORD (input_bfd, sym->e_value);
4229 else if ((type & N_STAB) != 0)
4231 val = GET_WORD (input_bfd, sym->e_value);
4236 /* If we get here with an indirect symbol, it means that
4237 we are outputting it with a real definition. In such
4238 a case we do not want to output the next symbol,
4239 which is the target of the indirection. */
4240 if ((type & N_TYPE) == N_INDR)
4245 /* We need to get the value from the hash table. We use
4246 hresolve so that if we have defined an indirect
4247 symbol we output the final definition. */
4248 if (h == (struct aout_link_hash_entry *) NULL)
4250 switch (type & N_TYPE)
4253 symsec = obj_textsec (input_bfd);
4256 symsec = obj_datasec (input_bfd);
4259 symsec = obj_bsssec (input_bfd);
4262 symsec = bfd_abs_section_ptr;
4269 else if (hresolve->root.type == bfd_link_hash_defined
4270 || hresolve->root.type == bfd_link_hash_defweak)
4272 asection *input_section;
4273 asection *output_section;
4275 /* This case usually means a common symbol which was
4276 turned into a defined symbol. */
4277 input_section = hresolve->root.u.def.section;
4278 output_section = input_section->output_section;
4279 BFD_ASSERT (bfd_is_abs_section (output_section)
4280 || output_section->owner == output_bfd);
4281 val = (hresolve->root.u.def.value
4282 + bfd_get_section_vma (output_bfd, output_section)
4283 + input_section->output_offset);
4285 /* Get the correct type based on the section. If
4286 this is a constructed set, force it to be
4287 globally visible. */
4296 if (output_section == obj_textsec (output_bfd))
4297 type |= (hresolve->root.type == bfd_link_hash_defined
4300 else if (output_section == obj_datasec (output_bfd))
4301 type |= (hresolve->root.type == bfd_link_hash_defined
4304 else if (output_section == obj_bsssec (output_bfd))
4305 type |= (hresolve->root.type == bfd_link_hash_defined
4309 type |= (hresolve->root.type == bfd_link_hash_defined
4313 else if (hresolve->root.type == bfd_link_hash_common)
4314 val = hresolve->root.u.c.size;
4315 else if (hresolve->root.type == bfd_link_hash_undefweak)
4323 if (symsec != (asection *) NULL)
4324 val = (symsec->output_section->vma
4325 + symsec->output_offset
4326 + (GET_WORD (input_bfd, sym->e_value)
4329 /* If this is a global symbol set the written flag, and if
4330 it is a local symbol see if we should discard it. */
4331 if (h != (struct aout_link_hash_entry *) NULL)
4334 h->indx = obj_aout_external_sym_count (output_bfd);
4336 else if ((type & N_TYPE) != N_SETT
4337 && (type & N_TYPE) != N_SETD
4338 && (type & N_TYPE) != N_SETB
4339 && (type & N_TYPE) != N_SETA)
4346 if ((type & N_STAB) == 0
4347 && bfd_is_local_label_name (input_bfd, name))
4361 /* An N_BINCL symbol indicates the start of the stabs
4362 entries for a header file. We need to scan ahead to the
4363 next N_EINCL symbol, ignoring nesting, adding up all the
4364 characters in the symbol names, not including the file
4365 numbers in types (the first number after an open
4367 if (type == N_BINCL)
4369 struct external_nlist *incl_sym;
4371 struct aout_link_includes_entry *incl_entry;
4372 struct aout_link_includes_totals *t;
4376 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
4380 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4381 if (incl_type == N_EINCL)
4387 else if (incl_type == N_BINCL)
4393 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
4394 for (; *s != '\0'; s++)
4399 /* Skip the file number. */
4401 while (isdigit ((unsigned char) *s))
4409 /* If we have already included a header file with the
4410 same value, then replace this one with an N_EXCL
4412 copy = ! finfo->info->keep_memory;
4413 incl_entry = aout_link_includes_lookup (&finfo->includes,
4415 if (incl_entry == NULL)
4417 for (t = incl_entry->totals; t != NULL; t = t->next)
4418 if (t->total == val)
4422 /* This is the first time we have seen this header
4423 file with this set of stabs strings. */
4424 t = ((struct aout_link_includes_totals *)
4425 bfd_hash_allocate (&finfo->includes.root,
4430 t->next = incl_entry->totals;
4431 incl_entry->totals = t;
4437 /* This is a duplicate header file. We must change
4438 it to be an N_EXCL entry, and mark all the
4439 included symbols to prevent outputting them. */
4443 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
4445 incl_sym++, incl_map++)
4449 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4450 if (incl_type == N_EINCL)
4459 else if (incl_type == N_BINCL)
4468 /* Copy this symbol into the list of symbols we are going to
4470 bfd_h_put_8 (output_bfd, type, outsym->e_type);
4471 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
4473 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
4476 if (! finfo->info->keep_memory)
4478 /* name points into a string table which we are going to
4479 free. If there is a hash table entry, use that string.
4480 Otherwise, copy name into memory. */
4481 if (h != (struct aout_link_hash_entry *) NULL)
4482 name = h->root.root.string;
4486 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4488 if (strtab_index == (bfd_size_type) -1)
4490 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4491 PUT_WORD (output_bfd, val, outsym->e_value);
4492 *symbol_map = obj_aout_external_sym_count (output_bfd);
4493 ++obj_aout_external_sym_count (output_bfd);
4497 /* Write out the output symbols we have just constructed. */
4498 if (outsym > finfo->output_syms)
4500 bfd_size_type outsym_count;
4502 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4504 outsym_count = outsym - finfo->output_syms;
4505 if (bfd_write ((PTR) finfo->output_syms,
4506 (bfd_size_type) EXTERNAL_NLIST_SIZE,
4507 (bfd_size_type) outsym_count, output_bfd)
4508 != outsym_count * EXTERNAL_NLIST_SIZE)
4510 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
4516 /* Write out a symbol that was not associated with an a.out input
4520 aout_link_write_other_symbol (h, data)
4521 struct aout_link_hash_entry *h;
4524 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4528 struct external_nlist outsym;
4531 output_bfd = finfo->output_bfd;
4533 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4535 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4536 (output_bfd, finfo->info, h)))
4538 /* FIXME: No way to handle errors. */
4548 /* An indx of -2 means the symbol must be written. */
4550 && (finfo->info->strip == strip_all
4551 || (finfo->info->strip == strip_some
4552 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4553 false, false) == NULL)))
4556 switch (h->root.type)
4560 /* Avoid variable not initialized warnings. */
4562 case bfd_link_hash_new:
4563 /* This can happen for set symbols when sets are not being
4566 case bfd_link_hash_undefined:
4567 type = N_UNDF | N_EXT;
4570 case bfd_link_hash_defined:
4571 case bfd_link_hash_defweak:
4575 sec = h->root.u.def.section->output_section;
4576 BFD_ASSERT (bfd_is_abs_section (sec)
4577 || sec->owner == output_bfd);
4578 if (sec == obj_textsec (output_bfd))
4579 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4580 else if (sec == obj_datasec (output_bfd))
4581 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4582 else if (sec == obj_bsssec (output_bfd))
4583 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4585 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4587 val = (h->root.u.def.value
4589 + h->root.u.def.section->output_offset);
4592 case bfd_link_hash_common:
4593 type = N_UNDF | N_EXT;
4594 val = h->root.u.c.size;
4596 case bfd_link_hash_undefweak:
4599 case bfd_link_hash_indirect:
4600 case bfd_link_hash_warning:
4601 /* FIXME: Ignore these for now. The circumstances under which
4602 they should be written out are not clear to me. */
4606 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4607 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4608 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4609 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4611 if (indx == (bfd_size_type) -1)
4613 /* FIXME: No way to handle errors. */
4616 PUT_WORD (output_bfd, indx, outsym.e_strx);
4617 PUT_WORD (output_bfd, val, outsym.e_value);
4619 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4620 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4621 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4623 /* FIXME: No way to handle errors. */
4627 finfo->symoff += EXTERNAL_NLIST_SIZE;
4628 h->indx = obj_aout_external_sym_count (output_bfd);
4629 ++obj_aout_external_sym_count (output_bfd);
4634 /* Link an a.out section into the output file. */
4637 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4639 struct aout_final_link_info *finfo;
4641 asection *input_section;
4642 file_ptr *reloff_ptr;
4643 bfd_size_type rel_size;
4645 bfd_size_type input_size;
4648 /* Get the section contents. */
4649 input_size = bfd_section_size (input_bfd, input_section);
4650 if (! bfd_get_section_contents (input_bfd, input_section,
4651 (PTR) finfo->contents,
4652 (file_ptr) 0, input_size))
4655 /* Read in the relocs if we haven't already done it. */
4656 if (aout_section_data (input_section) != NULL
4657 && aout_section_data (input_section)->relocs != NULL)
4658 relocs = aout_section_data (input_section)->relocs;
4661 relocs = finfo->relocs;
4664 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4665 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4670 /* Relocate the section contents. */
4671 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4673 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4674 (struct reloc_std_external *) relocs,
4675 rel_size, finfo->contents))
4680 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4681 (struct reloc_ext_external *) relocs,
4682 rel_size, finfo->contents))
4686 /* Write out the section contents. */
4687 if (! bfd_set_section_contents (finfo->output_bfd,
4688 input_section->output_section,
4689 (PTR) finfo->contents,
4690 input_section->output_offset,
4694 /* If we are producing relocateable output, the relocs were
4695 modified, and we now write them out. */
4696 if (finfo->info->relocateable && rel_size > 0)
4698 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4700 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4703 *reloff_ptr += rel_size;
4705 /* Assert that the relocs have not run into the symbols, and
4706 that if these are the text relocs they have not run into the
4708 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4709 && (reloff_ptr != &finfo->treloff
4711 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4717 /* Get the section corresponding to a reloc index. */
4719 static INLINE asection *
4720 aout_reloc_index_to_section (abfd, indx)
4724 switch (indx & N_TYPE)
4727 return obj_textsec (abfd);
4729 return obj_datasec (abfd);
4731 return obj_bsssec (abfd);
4734 return bfd_abs_section_ptr;
4742 /* Relocate an a.out section using standard a.out relocs. */
4745 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4747 struct aout_final_link_info *finfo;
4749 asection *input_section;
4750 struct reloc_std_external *relocs;
4751 bfd_size_type rel_size;
4754 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4756 struct aout_link_hash_entry *,
4757 PTR, bfd_byte *, boolean *,
4760 boolean relocateable;
4761 struct external_nlist *syms;
4763 struct aout_link_hash_entry **sym_hashes;
4765 bfd_size_type reloc_count;
4766 register struct reloc_std_external *rel;
4767 struct reloc_std_external *rel_end;
4769 output_bfd = finfo->output_bfd;
4770 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4772 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4773 BFD_ASSERT (input_bfd->xvec->header_byteorder
4774 == output_bfd->xvec->header_byteorder);
4776 relocateable = finfo->info->relocateable;
4777 syms = obj_aout_external_syms (input_bfd);
4778 strings = obj_aout_external_strings (input_bfd);
4779 sym_hashes = obj_aout_sym_hashes (input_bfd);
4780 symbol_map = finfo->symbol_map;
4782 reloc_count = rel_size / RELOC_STD_SIZE;
4784 rel_end = rel + reloc_count;
4785 for (; rel < rel_end; rel++)
4792 reloc_howto_type *howto;
4793 struct aout_link_hash_entry *h = NULL;
4795 bfd_reloc_status_type r;
4797 r_addr = GET_SWORD (input_bfd, rel->r_address);
4799 #ifdef MY_reloc_howto
4800 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel);
4806 unsigned int howto_idx;
4808 if (bfd_header_big_endian (input_bfd))
4810 r_index = ((rel->r_index[0] << 16)
4811 | (rel->r_index[1] << 8)
4813 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4814 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4815 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4816 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4817 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4818 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4819 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4823 r_index = ((rel->r_index[2] << 16)
4824 | (rel->r_index[1] << 8)
4826 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4827 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4828 r_baserel = (0 != (rel->r_type[0]
4829 & RELOC_STD_BITS_BASEREL_LITTLE));
4830 r_jmptable= (0 != (rel->r_type[0]
4831 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4832 r_relative= (0 != (rel->r_type[0]
4833 & RELOC_STD_BITS_RELATIVE_LITTLE));
4834 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4835 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4838 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4839 + 16 * r_jmptable + 32 * r_relative);
4840 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4841 howto = howto_table_std + howto_idx;
4847 /* We are generating a relocateable output file, and must
4848 modify the reloc accordingly. */
4851 /* If we know the symbol this relocation is against,
4852 convert it into a relocation against a section. This
4853 is what the native linker does. */
4854 h = sym_hashes[r_index];
4855 if (h != (struct aout_link_hash_entry *) NULL
4856 && (h->root.type == bfd_link_hash_defined
4857 || h->root.type == bfd_link_hash_defweak))
4859 asection *output_section;
4861 /* Change the r_extern value. */
4862 if (bfd_header_big_endian (output_bfd))
4863 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4865 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4867 /* Compute a new r_index. */
4868 output_section = h->root.u.def.section->output_section;
4869 if (output_section == obj_textsec (output_bfd))
4871 else if (output_section == obj_datasec (output_bfd))
4873 else if (output_section == obj_bsssec (output_bfd))
4878 /* Add the symbol value and the section VMA to the
4879 addend stored in the contents. */
4880 relocation = (h->root.u.def.value
4881 + output_section->vma
4882 + h->root.u.def.section->output_offset);
4886 /* We must change r_index according to the symbol
4888 r_index = symbol_map[r_index];
4894 /* We decided to strip this symbol, but it
4895 turns out that we can't. Note that we
4896 lose the other and desc information here.
4897 I don't think that will ever matter for a
4903 if (! aout_link_write_other_symbol (h,
4913 name = strings + GET_WORD (input_bfd,
4914 syms[r_index].e_strx);
4915 if (! ((*finfo->info->callbacks->unattached_reloc)
4916 (finfo->info, name, input_bfd, input_section,
4926 /* Write out the new r_index value. */
4927 if (bfd_header_big_endian (output_bfd))
4929 rel->r_index[0] = r_index >> 16;
4930 rel->r_index[1] = r_index >> 8;
4931 rel->r_index[2] = r_index;
4935 rel->r_index[2] = r_index >> 16;
4936 rel->r_index[1] = r_index >> 8;
4937 rel->r_index[0] = r_index;
4944 /* This is a relocation against a section. We must
4945 adjust by the amount that the section moved. */
4946 section = aout_reloc_index_to_section (input_bfd, r_index);
4947 relocation = (section->output_section->vma
4948 + section->output_offset
4952 /* Change the address of the relocation. */
4953 PUT_WORD (output_bfd,
4954 r_addr + input_section->output_offset,
4957 /* Adjust a PC relative relocation by removing the reference
4958 to the original address in the section and including the
4959 reference to the new address. */
4961 relocation -= (input_section->output_section->vma
4962 + input_section->output_offset
4963 - input_section->vma);
4965 #ifdef MY_relocatable_reloc
4966 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4969 if (relocation == 0)
4972 r = MY_relocate_contents (howto,
4973 input_bfd, relocation,
4980 /* We are generating an executable, and must do a full
4986 h = sym_hashes[r_index];
4988 if (h != (struct aout_link_hash_entry *) NULL
4989 && (h->root.type == bfd_link_hash_defined
4990 || h->root.type == bfd_link_hash_defweak))
4992 relocation = (h->root.u.def.value
4993 + h->root.u.def.section->output_section->vma
4994 + h->root.u.def.section->output_offset);
4996 else if (h != (struct aout_link_hash_entry *) NULL
4997 && h->root.type == bfd_link_hash_undefweak)
5009 section = aout_reloc_index_to_section (input_bfd, r_index);
5010 relocation = (section->output_section->vma
5011 + section->output_offset
5014 relocation += input_section->vma;
5017 if (check_dynamic_reloc != NULL)
5021 if (! ((*check_dynamic_reloc)
5022 (finfo->info, input_bfd, input_section, h,
5023 (PTR) rel, contents, &skip, &relocation)))
5029 /* Now warn if a global symbol is undefined. We could not
5030 do this earlier, because check_dynamic_reloc might want
5031 to skip this reloc. */
5032 if (hundef && ! finfo->info->shared && ! r_baserel)
5037 name = h->root.root.string;
5039 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5040 if (! ((*finfo->info->callbacks->undefined_symbol)
5041 (finfo->info, name, input_bfd, input_section,
5046 r = MY_final_link_relocate (howto,
5047 input_bfd, input_section,
5048 contents, r_addr, relocation,
5052 if (r != bfd_reloc_ok)
5057 case bfd_reloc_outofrange:
5059 case bfd_reloc_overflow:
5064 name = h->root.root.string;
5066 name = strings + GET_WORD (input_bfd,
5067 syms[r_index].e_strx);
5072 s = aout_reloc_index_to_section (input_bfd, r_index);
5073 name = bfd_section_name (input_bfd, s);
5075 if (! ((*finfo->info->callbacks->reloc_overflow)
5076 (finfo->info, name, howto->name,
5077 (bfd_vma) 0, input_bfd, input_section, r_addr)))
5088 /* Relocate an a.out section using extended a.out relocs. */
5091 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
5093 struct aout_final_link_info *finfo;
5095 asection *input_section;
5096 struct reloc_ext_external *relocs;
5097 bfd_size_type rel_size;
5100 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
5102 struct aout_link_hash_entry *,
5103 PTR, bfd_byte *, boolean *,
5106 boolean relocateable;
5107 struct external_nlist *syms;
5109 struct aout_link_hash_entry **sym_hashes;
5111 bfd_size_type reloc_count;
5112 register struct reloc_ext_external *rel;
5113 struct reloc_ext_external *rel_end;
5115 output_bfd = finfo->output_bfd;
5116 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
5118 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
5119 BFD_ASSERT (input_bfd->xvec->header_byteorder
5120 == output_bfd->xvec->header_byteorder);
5122 relocateable = finfo->info->relocateable;
5123 syms = obj_aout_external_syms (input_bfd);
5124 strings = obj_aout_external_strings (input_bfd);
5125 sym_hashes = obj_aout_sym_hashes (input_bfd);
5126 symbol_map = finfo->symbol_map;
5128 reloc_count = rel_size / RELOC_EXT_SIZE;
5130 rel_end = rel + reloc_count;
5131 for (; rel < rel_end; rel++)
5136 unsigned int r_type;
5138 struct aout_link_hash_entry *h = NULL;
5139 asection *r_section = NULL;
5142 r_addr = GET_SWORD (input_bfd, rel->r_address);
5144 if (bfd_header_big_endian (input_bfd))
5146 r_index = ((rel->r_index[0] << 16)
5147 | (rel->r_index[1] << 8)
5149 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
5150 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
5151 >> RELOC_EXT_BITS_TYPE_SH_BIG);
5155 r_index = ((rel->r_index[2] << 16)
5156 | (rel->r_index[1] << 8)
5158 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
5159 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
5160 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
5163 r_addend = GET_SWORD (input_bfd, rel->r_addend);
5165 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
5169 /* We are generating a relocateable output file, and must
5170 modify the reloc accordingly. */
5172 || r_type == RELOC_BASE10
5173 || r_type == RELOC_BASE13
5174 || r_type == RELOC_BASE22)
5176 /* If we know the symbol this relocation is against,
5177 convert it into a relocation against a section. This
5178 is what the native linker does. */
5179 if (r_type == RELOC_BASE10
5180 || r_type == RELOC_BASE13
5181 || r_type == RELOC_BASE22)
5184 h = sym_hashes[r_index];
5185 if (h != (struct aout_link_hash_entry *) NULL
5186 && (h->root.type == bfd_link_hash_defined
5187 || h->root.type == bfd_link_hash_defweak))
5189 asection *output_section;
5191 /* Change the r_extern value. */
5192 if (bfd_header_big_endian (output_bfd))
5193 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
5195 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
5197 /* Compute a new r_index. */
5198 output_section = h->root.u.def.section->output_section;
5199 if (output_section == obj_textsec (output_bfd))
5201 else if (output_section == obj_datasec (output_bfd))
5203 else if (output_section == obj_bsssec (output_bfd))
5208 /* Add the symbol value and the section VMA to the
5210 relocation = (h->root.u.def.value
5211 + output_section->vma
5212 + h->root.u.def.section->output_offset);
5214 /* Now RELOCATION is the VMA of the final
5215 destination. If this is a PC relative reloc,
5216 then ADDEND is the negative of the source VMA.
5217 We want to set ADDEND to the difference between
5218 the destination VMA and the source VMA, which
5219 means we must adjust RELOCATION by the change in
5220 the source VMA. This is done below. */
5224 /* We must change r_index according to the symbol
5226 r_index = symbol_map[r_index];
5232 /* We decided to strip this symbol, but it
5233 turns out that we can't. Note that we
5234 lose the other and desc information here.
5235 I don't think that will ever matter for a
5241 if (! aout_link_write_other_symbol (h,
5251 name = strings + GET_WORD (input_bfd,
5252 syms[r_index].e_strx);
5253 if (! ((*finfo->info->callbacks->unattached_reloc)
5254 (finfo->info, name, input_bfd, input_section,
5263 /* If this is a PC relative reloc, then the addend
5264 is the negative of the source VMA. We must
5265 adjust it by the change in the source VMA. This
5269 /* Write out the new r_index value. */
5270 if (bfd_header_big_endian (output_bfd))
5272 rel->r_index[0] = r_index >> 16;
5273 rel->r_index[1] = r_index >> 8;
5274 rel->r_index[2] = r_index;
5278 rel->r_index[2] = r_index >> 16;
5279 rel->r_index[1] = r_index >> 8;
5280 rel->r_index[0] = r_index;
5285 /* This is a relocation against a section. We must
5286 adjust by the amount that the section moved. */
5287 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5288 relocation = (r_section->output_section->vma
5289 + r_section->output_offset
5292 /* If this is a PC relative reloc, then the addend is
5293 the difference in VMA between the destination and the
5294 source. We have just adjusted for the change in VMA
5295 of the destination, so we must also adjust by the
5296 change in VMA of the source. This is done below. */
5299 /* As described above, we must always adjust a PC relative
5300 reloc by the change in VMA of the source. However, if
5301 pcrel_offset is set, then the addend does not include the
5302 location within the section, in which case we don't need
5303 to adjust anything. */
5304 if (howto_table_ext[r_type].pc_relative
5305 && ! howto_table_ext[r_type].pcrel_offset)
5306 relocation -= (input_section->output_section->vma
5307 + input_section->output_offset
5308 - input_section->vma);
5310 /* Change the addend if necessary. */
5311 if (relocation != 0)
5312 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
5314 /* Change the address of the relocation. */
5315 PUT_WORD (output_bfd,
5316 r_addr + input_section->output_offset,
5322 bfd_reloc_status_type r;
5324 /* We are generating an executable, and must do a full
5330 h = sym_hashes[r_index];
5332 if (h != (struct aout_link_hash_entry *) NULL
5333 && (h->root.type == bfd_link_hash_defined
5334 || h->root.type == bfd_link_hash_defweak))
5336 relocation = (h->root.u.def.value
5337 + h->root.u.def.section->output_section->vma
5338 + h->root.u.def.section->output_offset);
5340 else if (h != (struct aout_link_hash_entry *) NULL
5341 && h->root.type == bfd_link_hash_undefweak)
5349 else if (r_type == RELOC_BASE10
5350 || r_type == RELOC_BASE13
5351 || r_type == RELOC_BASE22)
5353 struct external_nlist *sym;
5356 /* For base relative relocs, r_index is always an index
5357 into the symbol table, even if r_extern is 0. */
5358 sym = syms + r_index;
5359 type = bfd_h_get_8 (input_bfd, sym->e_type);
5360 if ((type & N_TYPE) == N_TEXT
5362 r_section = obj_textsec (input_bfd);
5363 else if ((type & N_TYPE) == N_DATA
5365 r_section = obj_datasec (input_bfd);
5366 else if ((type & N_TYPE) == N_BSS
5368 r_section = obj_bsssec (input_bfd);
5369 else if ((type & N_TYPE) == N_ABS
5371 r_section = bfd_abs_section_ptr;
5374 relocation = (r_section->output_section->vma
5375 + r_section->output_offset
5376 + (GET_WORD (input_bfd, sym->e_value)
5381 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5383 /* If this is a PC relative reloc, then R_ADDEND is the
5384 difference between the two vmas, or
5385 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
5387 old_dest_sec == section->vma
5389 old_src_sec == input_section->vma
5391 old_src_off == r_addr
5393 _bfd_final_link_relocate expects RELOCATION +
5394 R_ADDEND to be the VMA of the destination minus
5395 r_addr (the minus r_addr is because this relocation
5396 is not pcrel_offset, which is a bit confusing and
5397 should, perhaps, be changed), or
5400 new_dest_sec == output_section->vma + output_offset
5401 We arrange for this to happen by setting RELOCATION to
5402 new_dest_sec + old_src_sec - old_dest_sec
5404 If this is not a PC relative reloc, then R_ADDEND is
5405 simply the VMA of the destination, so we set
5406 RELOCATION to the change in the destination VMA, or
5407 new_dest_sec - old_dest_sec
5409 relocation = (r_section->output_section->vma
5410 + r_section->output_offset
5412 if (howto_table_ext[r_type].pc_relative)
5413 relocation += input_section->vma;
5416 if (check_dynamic_reloc != NULL)
5420 if (! ((*check_dynamic_reloc)
5421 (finfo->info, input_bfd, input_section, h,
5422 (PTR) rel, contents, &skip, &relocation)))
5428 /* Now warn if a global symbol is undefined. We could not
5429 do this earlier, because check_dynamic_reloc might want
5430 to skip this reloc. */
5432 && ! finfo->info->shared
5433 && r_type != RELOC_BASE10
5434 && r_type != RELOC_BASE13
5435 && r_type != RELOC_BASE22)
5440 name = h->root.root.string;
5442 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5443 if (! ((*finfo->info->callbacks->undefined_symbol)
5444 (finfo->info, name, input_bfd, input_section,
5449 if (r_type != RELOC_SPARC_REV32)
5450 r = MY_final_link_relocate (howto_table_ext + r_type,
5451 input_bfd, input_section,
5452 contents, r_addr, relocation,
5458 x = bfd_get_32 (input_bfd, contents + r_addr);
5459 x = x + relocation + r_addend;
5460 bfd_putl32 (/*input_bfd,*/ x, contents + r_addr);
5464 if (r != bfd_reloc_ok)
5469 case bfd_reloc_outofrange:
5471 case bfd_reloc_overflow:
5476 name = h->root.root.string;
5478 || r_type == RELOC_BASE10
5479 || r_type == RELOC_BASE13
5480 || r_type == RELOC_BASE22)
5481 name = strings + GET_WORD (input_bfd,
5482 syms[r_index].e_strx);
5487 s = aout_reloc_index_to_section (input_bfd, r_index);
5488 name = bfd_section_name (input_bfd, s);
5490 if (! ((*finfo->info->callbacks->reloc_overflow)
5491 (finfo->info, name, howto_table_ext[r_type].name,
5492 r_addend, input_bfd, input_section, r_addr)))
5504 /* Handle a link order which is supposed to generate a reloc. */
5507 aout_link_reloc_link_order (finfo, o, p)
5508 struct aout_final_link_info *finfo;
5510 struct bfd_link_order *p;
5512 struct bfd_link_order_reloc *pr;
5515 reloc_howto_type *howto;
5516 file_ptr *reloff_ptr = NULL;
5517 struct reloc_std_external srel;
5518 struct reloc_ext_external erel;
5523 if (p->type == bfd_section_reloc_link_order)
5526 if (bfd_is_abs_section (pr->u.section))
5527 r_index = N_ABS | N_EXT;
5530 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5531 r_index = pr->u.section->target_index;
5536 struct aout_link_hash_entry *h;
5538 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5540 h = ((struct aout_link_hash_entry *)
5541 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
5542 pr->u.name, false, false, true));
5543 if (h != (struct aout_link_hash_entry *) NULL
5548 /* We decided to strip this symbol, but it turns out that we
5549 can't. Note that we lose the other and desc information
5550 here. I don't think that will ever matter for a global
5554 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5560 if (! ((*finfo->info->callbacks->unattached_reloc)
5561 (finfo->info, pr->u.name, (bfd *) NULL,
5562 (asection *) NULL, (bfd_vma) 0)))
5568 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5571 bfd_set_error (bfd_error_bad_value);
5575 if (o == obj_textsec (finfo->output_bfd))
5576 reloff_ptr = &finfo->treloff;
5577 else if (o == obj_datasec (finfo->output_bfd))
5578 reloff_ptr = &finfo->dreloff;
5582 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5585 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto,
5595 r_pcrel = howto->pc_relative;
5596 r_baserel = (howto->type & 8) != 0;
5597 r_jmptable = (howto->type & 16) != 0;
5598 r_relative = (howto->type & 32) != 0;
5599 r_length = howto->size;
5601 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5602 if (bfd_header_big_endian (finfo->output_bfd))
5604 srel.r_index[0] = r_index >> 16;
5605 srel.r_index[1] = r_index >> 8;
5606 srel.r_index[2] = r_index;
5608 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5609 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5610 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5611 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5612 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5613 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5617 srel.r_index[2] = r_index >> 16;
5618 srel.r_index[1] = r_index >> 8;
5619 srel.r_index[0] = r_index;
5621 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5622 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5623 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5624 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5625 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5626 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5630 rel_ptr = (PTR) &srel;
5632 /* We have to write the addend into the object file, since
5633 standard a.out relocs are in place. It would be more
5634 reliable if we had the current contents of the file here,
5635 rather than assuming zeroes, but we can't read the file since
5636 it was opened using bfd_openw. */
5637 if (pr->addend != 0)
5640 bfd_reloc_status_type r;
5644 size = bfd_get_reloc_size (howto);
5645 buf = (bfd_byte *) bfd_zmalloc (size);
5646 if (buf == (bfd_byte *) NULL)
5648 r = MY_relocate_contents (howto, finfo->output_bfd,
5655 case bfd_reloc_outofrange:
5657 case bfd_reloc_overflow:
5658 if (! ((*finfo->info->callbacks->reloc_overflow)
5660 (p->type == bfd_section_reloc_link_order
5661 ? bfd_section_name (finfo->output_bfd,
5664 howto->name, pr->addend, (bfd *) NULL,
5665 (asection *) NULL, (bfd_vma) 0)))
5672 ok = bfd_set_section_contents (finfo->output_bfd, o,
5674 (file_ptr) p->offset,
5683 #ifdef MY_put_ext_reloc
5684 MY_put_ext_reloc (finfo->output_bfd, r_extern, r_index, p->offset,
5685 howto, &erel, pr->addend);
5687 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5689 if (bfd_header_big_endian (finfo->output_bfd))
5691 erel.r_index[0] = r_index >> 16;
5692 erel.r_index[1] = r_index >> 8;
5693 erel.r_index[2] = r_index;
5695 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5696 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5700 erel.r_index[2] = r_index >> 16;
5701 erel.r_index[1] = r_index >> 8;
5702 erel.r_index[0] = r_index;
5704 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5705 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5708 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
5709 #endif /* MY_put_ext_reloc */
5711 rel_ptr = (PTR) &erel;
5714 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5715 || (bfd_write (rel_ptr, (bfd_size_type) 1,
5716 obj_reloc_entry_size (finfo->output_bfd),
5718 != obj_reloc_entry_size (finfo->output_bfd)))
5721 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5723 /* Assert that the relocs have not run into the symbols, and that n
5724 the text relocs have not run into the data relocs. */
5725 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5726 && (reloff_ptr != &finfo->treloff
5728 <= obj_datasec (finfo->output_bfd)->rel_filepos)));