1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 BFD supports a number of different flavours of a.out format,
29 though the major differences are only the sizes of the
30 structures on disk, and the shape of the relocation
33 The support is split into a basic support file @file{aoutx.h}
34 and other files which derive functions from the base. One
35 derivation file is @file{aoutf1.h} (for a.out flavour 1), and
36 adds to the basic a.out functions support for sun3, sun4, 386
37 and 29k a.out files, to create a target jump vector for a
40 This information is further split out into more specific files
41 for each machine, including @file{sunos.c} for sun3 and sun4,
42 @file{newsos3.c} for the Sony NEWS, and @file{demo64.c} for a
43 demonstration of a 64 bit a.out format.
45 The base file @file{aoutx.h} defines general mechanisms for
46 reading and writing records to and from disk and various
47 other methods which BFD requires. It is included by
48 @file{aout32.c} and @file{aout64.c} to form the names
49 <<aout_32_swap_exec_header_in>>, <<aout_64_swap_exec_header_in>>, etc.
51 As an example, this is what goes on to make the back end for a
52 sun4, from @file{aout32.c}:
54 | #define ARCH_SIZE 32
60 | aout_32_canonicalize_reloc
61 | aout_32_find_nearest_line
63 | aout_32_get_reloc_upper_bound
68 | #define TARGET_NAME "a.out-sunos-big"
69 | #define VECNAME sunos_big_vec
72 requires all the names from @file{aout32.c}, and produces the jump vector
76 The file @file{host-aout.c} is a special case. It is for a large set
77 of hosts that use ``more or less standard'' a.out files, and
78 for which cross-debugging is not interesting. It uses the
79 standard 32-bit a.out support routines, but determines the
80 file offsets and addresses of the text, data, and BSS
81 sections, the machine architecture and machine type, and the
82 entry point address, in a host-dependent manner. Once these
83 values have been determined, generic code is used to handle
86 When porting it to run on a new system, you must supply:
90 | HOST_MACHINE_ARCH (optional)
91 | HOST_MACHINE_MACHINE (optional)
92 | HOST_TEXT_START_ADDR
95 in the file @file{../include/sys/h-@var{XXX}.h} (for your host). These
96 values, plus the structures and macros defined in @file{a.out.h} on
97 your host system, will produce a BFD target that will access
98 ordinary a.out files on your host. To configure a new machine
99 to use @file{host-aout.c}, specify:
101 | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
102 | TDEPFILES= host-aout.o trad-core.o
104 in the @file{config/@var{XXX}.mt} file, and modify @file{configure.in}
106 @file{@var{XXX}.mt} file (by setting "<<bfd_target=XXX>>") when your
107 configuration is selected.
112 * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
113 Doesn't matter what the setting of WP_TEXT is on output, but it'll
115 * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
116 * Any BFD with both flags clear is OMAGIC.
117 (Just want to make these explicit, so the conditions tested in this
118 file make sense if you're more familiar with a.out than with BFD.) */
120 #define KEEPIT udata.i
122 #include <string.h> /* For strchr and friends */
129 #include "aout/aout64.h"
130 #include "aout/stab_gnu.h"
133 static boolean aout_get_external_symbols PARAMS ((bfd *));
134 static boolean translate_from_native_sym_flags
135 PARAMS ((bfd *, aout_symbol_type *));
136 static boolean translate_to_native_sym_flags
137 PARAMS ((bfd *, asymbol *, struct external_nlist *));
144 The file @file{aoutx.h} provides for both the @emph{standard}
145 and @emph{extended} forms of a.out relocation records.
147 The standard records contain only an
148 address, a symbol index, and a type field. The extended records
149 (used on 29ks and sparcs) also have a full integer for an
153 #ifndef CTOR_TABLE_RELOC_HOWTO
154 #define CTOR_TABLE_RELOC_IDX 2
155 #define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \
156 ? howto_table_ext : howto_table_std) \
157 + CTOR_TABLE_RELOC_IDX)
160 #ifndef MY_swap_std_reloc_in
161 #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
164 #ifndef MY_swap_std_reloc_out
165 #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
168 #ifndef MY_final_link_relocate
169 #define MY_final_link_relocate _bfd_final_link_relocate
172 #ifndef MY_relocate_contents
173 #define MY_relocate_contents _bfd_relocate_contents
176 #define howto_table_ext NAME(aout,ext_howto_table)
177 #define howto_table_std NAME(aout,std_howto_table)
179 reloc_howto_type howto_table_ext[] =
181 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
182 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false),
183 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false),
184 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false),
185 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false),
186 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false),
187 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false),
188 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false),
189 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false),
190 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false),
191 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false),
192 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false),
193 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false),
194 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false),
195 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false),
196 HOWTO(RELOC_BASE10, 0, 2, 16, false, 0, complain_overflow_bitfield,0,"BASE10", false, 0,0x0000ffff, false),
197 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"BASE13", false, 0,0x00001fff, false),
198 HOWTO(RELOC_BASE22, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x00000000, false),
199 HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true),
200 HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true),
201 HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false),
202 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false),
203 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false),
204 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false),
205 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
208 /* Convert standard reloc records to "arelent" format (incl byte swap). */
210 reloc_howto_type howto_table_std[] = {
211 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
212 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false),
213 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false),
214 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false),
215 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false),
216 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
217 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
218 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
219 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
220 HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false),
221 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false),
222 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false),
228 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false),
236 { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 },
237 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
245 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false),
248 #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
251 NAME(aout,reloc_type_lookup) (abfd,code)
253 bfd_reloc_code_real_type code;
255 #define EXT(i,j) case i: return &howto_table_ext[j]
256 #define STD(i,j) case i: return &howto_table_std[j]
257 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
258 if (code == BFD_RELOC_CTOR)
259 switch (bfd_get_arch_info (abfd)->bits_per_address)
271 EXT (BFD_RELOC_32, 2);
272 EXT (BFD_RELOC_HI22, 8);
273 EXT (BFD_RELOC_LO10, 11);
274 EXT (BFD_RELOC_32_PCREL_S2, 6);
275 EXT (BFD_RELOC_SPARC_WDISP22, 7);
276 EXT (BFD_RELOC_SPARC13, 10);
277 EXT (BFD_RELOC_SPARC_GOT10, 14);
278 EXT (BFD_RELOC_SPARC_BASE13, 15);
279 EXT (BFD_RELOC_SPARC_GOT13, 15);
280 EXT (BFD_RELOC_SPARC_GOT22, 16);
281 EXT (BFD_RELOC_SPARC_PC10, 17);
282 EXT (BFD_RELOC_SPARC_PC22, 18);
283 EXT (BFD_RELOC_SPARC_WPLT30, 19);
284 default: return (reloc_howto_type *) NULL;
290 STD (BFD_RELOC_16, 1);
291 STD (BFD_RELOC_32, 2);
292 STD (BFD_RELOC_8_PCREL, 4);
293 STD (BFD_RELOC_16_PCREL, 5);
294 STD (BFD_RELOC_32_PCREL, 6);
295 STD (BFD_RELOC_16_BASEREL, 9);
296 STD (BFD_RELOC_32_BASEREL, 10);
297 default: return (reloc_howto_type *) NULL;
303 Internal entry points
306 @file{aoutx.h} exports several routines for accessing the
307 contents of an a.out file, which are gathered and exported in
308 turn by various format specific files (eg sunos.c).
314 aout_@var{size}_swap_exec_header_in
317 void aout_@var{size}_swap_exec_header_in,
319 struct external_exec *raw_bytes,
320 struct internal_exec *execp);
323 Swap the information in an executable header @var{raw_bytes} taken
324 from a raw byte stream memory image into the internal exec header
325 structure @var{execp}.
328 #ifndef NAME_swap_exec_header_in
330 NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
332 struct external_exec *raw_bytes;
333 struct internal_exec *execp;
335 struct external_exec *bytes = (struct external_exec *)raw_bytes;
337 /* The internal_exec structure has some fields that are unused in this
338 configuration (IE for i960), so ensure that all such uninitialized
339 fields are zero'd out. There are places where two of these structs
340 are memcmp'd, and thus the contents do matter. */
341 memset ((PTR) execp, 0, sizeof (struct internal_exec));
342 /* Now fill in fields in the execp, from the bytes in the raw data. */
343 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
344 execp->a_text = GET_WORD (abfd, bytes->e_text);
345 execp->a_data = GET_WORD (abfd, bytes->e_data);
346 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
347 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
348 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
349 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
350 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
352 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
357 aout_@var{size}_swap_exec_header_out
360 void aout_@var{size}_swap_exec_header_out
362 struct internal_exec *execp,
363 struct external_exec *raw_bytes);
366 Swap the information in an internal exec header structure
367 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
370 NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
372 struct internal_exec *execp;
373 struct external_exec *raw_bytes;
375 struct external_exec *bytes = (struct external_exec *)raw_bytes;
377 /* Now fill in fields in the raw data, from the fields in the exec struct. */
378 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
379 PUT_WORD (abfd, execp->a_text , bytes->e_text);
380 PUT_WORD (abfd, execp->a_data , bytes->e_data);
381 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
382 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
383 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
384 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
385 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
388 /* Make all the section for an a.out file. */
391 NAME(aout,make_sections) (abfd)
394 if (obj_textsec (abfd) == (asection *) NULL
395 && bfd_make_section (abfd, ".text") == (asection *) NULL)
397 if (obj_datasec (abfd) == (asection *) NULL
398 && bfd_make_section (abfd, ".data") == (asection *) NULL)
400 if (obj_bsssec (abfd) == (asection *) NULL
401 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
408 aout_@var{size}_some_aout_object_p
411 const bfd_target *aout_@var{size}_some_aout_object_p
413 const bfd_target *(*callback_to_real_object_p)());
416 Some a.out variant thinks that the file open in @var{abfd}
417 checking is an a.out file. Do some more checking, and set up
418 for access if it really is. Call back to the calling
419 environment's "finish up" function just before returning, to
420 handle any last-minute setup.
424 NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
426 struct internal_exec *execp;
427 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
429 struct aout_data_struct *rawptr, *oldrawptr;
430 const bfd_target *result;
432 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
433 if (rawptr == NULL) {
434 bfd_set_error (bfd_error_no_memory);
438 oldrawptr = abfd->tdata.aout_data;
439 abfd->tdata.aout_data = rawptr;
441 /* Copy the contents of the old tdata struct.
442 In particular, we want the subformat, since for hpux it was set in
443 hp300hpux.c:swap_exec_header_in and will be used in
444 hp300hpux.c:callback. */
445 if (oldrawptr != NULL)
446 *abfd->tdata.aout_data = *oldrawptr;
448 abfd->tdata.aout_data->a.hdr = &rawptr->e;
449 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */
450 execp = abfd->tdata.aout_data->a.hdr;
452 /* Set the file flags */
453 abfd->flags = NO_FLAGS;
454 if (execp->a_drsize || execp->a_trsize)
455 abfd->flags |= HAS_RELOC;
456 /* Setting of EXEC_P has been deferred to the bottom of this function */
458 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
459 if (N_DYNAMIC(*execp))
460 abfd->flags |= DYNAMIC;
462 if (N_MAGIC (*execp) == ZMAGIC)
464 abfd->flags |= D_PAGED | WP_TEXT;
465 adata (abfd).magic = z_magic;
467 else if (N_MAGIC (*execp) == QMAGIC)
469 abfd->flags |= D_PAGED | WP_TEXT;
470 adata (abfd).magic = z_magic;
471 adata (abfd).subformat = q_magic_format;
473 else if (N_MAGIC (*execp) == NMAGIC)
475 abfd->flags |= WP_TEXT;
476 adata (abfd).magic = n_magic;
478 else if (N_MAGIC (*execp) == OMAGIC
479 || N_MAGIC (*execp) == BMAGIC)
480 adata (abfd).magic = o_magic;
483 /* Should have been checked with N_BADMAG before this routine
488 bfd_get_start_address (abfd) = execp->a_entry;
490 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
491 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
493 /* The default relocation entry size is that of traditional V7 Unix. */
494 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
496 /* The default symbol entry size is that of traditional Unix. */
497 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
499 obj_aout_external_syms (abfd) = NULL;
500 obj_aout_external_strings (abfd) = NULL;
501 obj_aout_sym_hashes (abfd) = NULL;
503 if (! NAME(aout,make_sections) (abfd))
506 obj_datasec (abfd)->_raw_size = execp->a_data;
507 obj_bsssec (abfd)->_raw_size = execp->a_bss;
509 obj_textsec (abfd)->flags =
510 (execp->a_trsize != 0
511 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
512 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
513 obj_datasec (abfd)->flags =
514 (execp->a_drsize != 0
515 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
516 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
517 obj_bsssec (abfd)->flags = SEC_ALLOC;
519 #ifdef THIS_IS_ONLY_DOCUMENTATION
520 /* The common code can't fill in these things because they depend
521 on either the start address of the text segment, the rounding
522 up of virtual addresses between segments, or the starting file
523 position of the text segment -- all of which varies among different
524 versions of a.out. */
526 /* Call back to the format-dependent code to fill in the rest of the
527 fields and do any further cleanup. Things that should be filled
528 in by the callback: */
530 struct exec *execp = exec_hdr (abfd);
532 obj_textsec (abfd)->size = N_TXTSIZE(*execp);
533 obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp);
534 /* data and bss are already filled in since they're so standard */
536 /* The virtual memory addresses of the sections */
537 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
538 obj_datasec (abfd)->vma = N_DATADDR(*execp);
539 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
541 /* The file offsets of the sections */
542 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
543 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
545 /* The file offsets of the relocation info */
546 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
547 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
549 /* The file offsets of the string table and symbol table. */
550 obj_str_filepos (abfd) = N_STROFF (*execp);
551 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
553 /* Determine the architecture and machine type of the object file. */
554 switch (N_MACHTYPE (*exec_hdr (abfd))) {
556 abfd->obj_arch = bfd_arch_obscure;
560 adata(abfd)->page_size = TARGET_PAGE_SIZE;
561 adata(abfd)->segment_size = SEGMENT_SIZE;
562 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
566 /* The architecture is encoded in various ways in various a.out variants,
567 or is not encoded at all in some of them. The relocation size depends
568 on the architecture and the a.out variant. Finally, the return value
569 is the bfd_target vector in use. If an error occurs, return zero and
570 set bfd_error to the appropriate error code.
572 Formats such as b.out, which have additional fields in the a.out
573 header, should cope with them in this callback as well. */
574 #endif /* DOCUMENTATION */
576 result = (*callback_to_real_object_p)(abfd);
578 /* Now that the segment addresses have been worked out, take a better
579 guess at whether the file is executable. If the entry point
580 is within the text segment, assume it is. (This makes files
581 executable even if their entry point address is 0, as long as
582 their text starts at zero.). */
583 if ((execp->a_entry >= obj_textsec(abfd)->vma) &&
584 (execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
585 abfd->flags |= EXEC_P;
589 struct stat stat_buf;
591 /* The original heuristic doesn't work in some important cases.
592 The a.out file has no information about the text start
593 address. For files (like kernels) linked to non-standard
594 addresses (ld -Ttext nnn) the entry point may not be between
595 the default text start (obj_textsec(abfd)->vma) and
596 (obj_textsec(abfd)->vma) + text size. This is not just a mach
597 issue. Many kernels are loaded at non standard addresses. */
599 && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0)
600 && ((stat_buf.st_mode & 0111) != 0))
601 abfd->flags |= EXEC_P;
603 #endif /* STAT_FOR_EXEC */
607 #if 0 /* These should be set correctly anyways. */
608 abfd->sections = obj_textsec (abfd);
609 obj_textsec (abfd)->next = obj_datasec (abfd);
610 obj_datasec (abfd)->next = obj_bsssec (abfd);
616 abfd->tdata.aout_data = oldrawptr;
623 aout_@var{size}_mkobject
626 boolean aout_@var{size}_mkobject, (bfd *abfd);
629 Initialize BFD @var{abfd} for use with a.out files.
633 NAME(aout,mkobject) (abfd)
636 struct aout_data_struct *rawptr;
638 bfd_set_error (bfd_error_system_call);
640 /* Use an intermediate variable for clarity */
641 rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
643 if (rawptr == NULL) {
644 bfd_set_error (bfd_error_no_memory);
648 abfd->tdata.aout_data = rawptr;
649 exec_hdr (abfd) = &(rawptr->e);
651 obj_textsec (abfd) = (asection *)NULL;
652 obj_datasec (abfd) = (asection *)NULL;
653 obj_bsssec (abfd) = (asection *)NULL;
661 aout_@var{size}_machine_type
664 enum machine_type aout_@var{size}_machine_type
665 (enum bfd_architecture arch,
666 unsigned long machine));
669 Keep track of machine architecture and machine type for
670 a.out's. Return the <<machine_type>> for a particular
671 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
672 and machine can't be represented in a.out format.
674 If the architecture is understood, machine type 0 (default)
675 is always understood.
679 NAME(aout,machine_type) (arch, machine, unknown)
680 enum bfd_architecture arch;
681 unsigned long machine;
684 enum machine_type arch_flags;
686 arch_flags = M_UNKNOWN;
692 || machine == bfd_mach_sparc
693 || machine == bfd_mach_sparc64)
694 arch_flags = M_SPARC;
699 case 0: arch_flags = M_68010; break;
700 case 68000: arch_flags = M_UNKNOWN; *unknown = false; break;
701 case 68010: arch_flags = M_68010; break;
702 case 68020: arch_flags = M_68020; break;
703 default: arch_flags = M_UNKNOWN; break;
708 if (machine == 0) arch_flags = M_386;
712 if (machine == 0) arch_flags = M_29K;
716 if (machine == 0) arch_flags = M_ARM;
723 case 3000: arch_flags = M_MIPS1; break;
724 case 4000: /* mips3 */
726 case 8000: /* mips4 */
728 case 6000: arch_flags = M_MIPS2; break;
729 default: arch_flags = M_UNKNOWN; break;
735 case 0: arch_flags = M_NS32532; break;
736 case 32032: arch_flags = M_NS32032; break;
737 case 32532: arch_flags = M_NS32532; break;
738 default: arch_flags = M_UNKNOWN; break;
746 /* start-sanitize-rce */
750 /* end-sanitize-rce */
753 arch_flags = M_UNKNOWN;
756 if (arch_flags != M_UNKNOWN)
765 aout_@var{size}_set_arch_mach
768 boolean aout_@var{size}_set_arch_mach,
770 enum bfd_architecture arch,
771 unsigned long machine));
774 Set the architecture and the machine of the BFD @var{abfd} to the
775 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
776 can support the architecture required.
780 NAME(aout,set_arch_mach) (abfd, arch, machine)
782 enum bfd_architecture arch;
783 unsigned long machine;
785 if (! bfd_default_set_arch_mach (abfd, arch, machine))
788 if (arch != bfd_arch_unknown)
792 NAME(aout,machine_type) (arch, machine, &unknown);
797 /* Determine the size of a relocation entry */
802 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
805 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
809 return (*aout_backend_info(abfd)->set_sizes) (abfd);
813 adjust_o_magic (abfd, execp)
815 struct internal_exec *execp;
817 file_ptr pos = adata (abfd).exec_bytes_size;
822 obj_textsec(abfd)->filepos = pos;
823 if (!obj_textsec(abfd)->user_set_vma)
824 obj_textsec(abfd)->vma = vma;
826 vma = obj_textsec(abfd)->vma;
828 pos += obj_textsec(abfd)->_raw_size;
829 vma += obj_textsec(abfd)->_raw_size;
832 if (!obj_datasec(abfd)->user_set_vma)
834 #if 0 /* ?? Does alignment in the file image really matter? */
835 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
837 obj_textsec(abfd)->_raw_size += pad;
840 obj_datasec(abfd)->vma = vma;
843 vma = obj_datasec(abfd)->vma;
844 obj_datasec(abfd)->filepos = pos;
845 pos += obj_datasec(abfd)->_raw_size;
846 vma += obj_datasec(abfd)->_raw_size;
849 if (!obj_bsssec(abfd)->user_set_vma)
852 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
854 obj_datasec(abfd)->_raw_size += pad;
857 obj_bsssec(abfd)->vma = vma;
861 /* The VMA of the .bss section is set by the the VMA of the
862 .data section plus the size of the .data section. We may
863 need to add padding bytes to make this true. */
864 pad = obj_bsssec (abfd)->vma - vma;
867 obj_datasec (abfd)->_raw_size += pad;
871 obj_bsssec(abfd)->filepos = pos;
873 /* Fix up the exec header. */
874 execp->a_text = obj_textsec(abfd)->_raw_size;
875 execp->a_data = obj_datasec(abfd)->_raw_size;
876 execp->a_bss = obj_bsssec(abfd)->_raw_size;
877 N_SET_MAGIC (*execp, OMAGIC);
881 adjust_z_magic (abfd, execp)
883 struct internal_exec *execp;
885 bfd_size_type data_pad, text_pad;
887 CONST struct aout_backend_data *abdp;
888 int ztih; /* Nonzero if text includes exec header. */
890 abdp = aout_backend_info (abfd);
894 && (abdp->text_includes_header
895 || obj_aout_subformat (abfd) == q_magic_format));
896 obj_textsec(abfd)->filepos = (ztih
897 ? adata(abfd).exec_bytes_size
898 : adata(abfd).zmagic_disk_block_size);
899 if (! obj_textsec(abfd)->user_set_vma)
901 /* ?? Do we really need to check for relocs here? */
902 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
905 ? (abdp->default_text_vma
906 + adata(abfd).exec_bytes_size)
907 : abdp->default_text_vma));
912 /* The .text section is being loaded at an unusual address. We
913 may need to pad it such that the .data section starts at a page
916 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
917 & (adata (abfd).page_size - 1));
919 text_pad = ((- obj_textsec (abfd)->vma)
920 & (adata (abfd).page_size - 1));
923 /* Find start of data. */
926 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
927 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
931 /* Note that if page_size == zmagic_disk_block_size, then
932 filepos == page_size, and this case is the same as the ztih
934 text_end = obj_textsec (abfd)->_raw_size;
935 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
936 text_end += obj_textsec (abfd)->filepos;
938 obj_textsec(abfd)->_raw_size += text_pad;
939 text_end += text_pad;
942 if (!obj_datasec(abfd)->user_set_vma)
945 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
946 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
948 if (abdp && abdp->zmagic_mapped_contiguous)
950 text_pad = (obj_datasec(abfd)->vma
951 - obj_textsec(abfd)->vma
952 - obj_textsec(abfd)->_raw_size);
953 obj_textsec(abfd)->_raw_size += text_pad;
955 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
956 + obj_textsec(abfd)->_raw_size);
958 /* Fix up exec header while we're at it. */
959 execp->a_text = obj_textsec(abfd)->_raw_size;
960 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
961 execp->a_text += adata(abfd).exec_bytes_size;
962 if (obj_aout_subformat (abfd) == q_magic_format)
963 N_SET_MAGIC (*execp, QMAGIC);
965 N_SET_MAGIC (*execp, ZMAGIC);
967 /* Spec says data section should be rounded up to page boundary. */
968 obj_datasec(abfd)->_raw_size
969 = align_power (obj_datasec(abfd)->_raw_size,
970 obj_bsssec(abfd)->alignment_power);
971 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
972 adata(abfd).page_size);
973 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
976 if (!obj_bsssec(abfd)->user_set_vma)
977 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
978 + obj_datasec(abfd)->_raw_size);
979 /* If the BSS immediately follows the data section and extra space
980 in the page is left after the data section, fudge data
981 in the header so that the bss section looks smaller by that
982 amount. We'll start the bss section there, and lie to the OS.
983 (Note that a linker script, as well as the above assignment,
984 could have explicitly set the BSS vma to immediately follow
985 the data section.) */
986 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
987 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
988 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
989 obj_bsssec(abfd)->_raw_size - data_pad;
991 execp->a_bss = obj_bsssec(abfd)->_raw_size;
995 adjust_n_magic (abfd, execp)
997 struct internal_exec *execp;
999 file_ptr pos = adata(abfd).exec_bytes_size;
1004 obj_textsec(abfd)->filepos = pos;
1005 if (!obj_textsec(abfd)->user_set_vma)
1006 obj_textsec(abfd)->vma = vma;
1008 vma = obj_textsec(abfd)->vma;
1009 pos += obj_textsec(abfd)->_raw_size;
1010 vma += obj_textsec(abfd)->_raw_size;
1013 obj_datasec(abfd)->filepos = pos;
1014 if (!obj_datasec(abfd)->user_set_vma)
1015 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1016 vma = obj_datasec(abfd)->vma;
1018 /* Since BSS follows data immediately, see if it needs alignment. */
1019 vma += obj_datasec(abfd)->_raw_size;
1020 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
1021 obj_datasec(abfd)->_raw_size += pad;
1022 pos += obj_datasec(abfd)->_raw_size;
1025 if (!obj_bsssec(abfd)->user_set_vma)
1026 obj_bsssec(abfd)->vma = vma;
1028 vma = obj_bsssec(abfd)->vma;
1030 /* Fix up exec header. */
1031 execp->a_text = obj_textsec(abfd)->_raw_size;
1032 execp->a_data = obj_datasec(abfd)->_raw_size;
1033 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1034 N_SET_MAGIC (*execp, NMAGIC);
1038 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1040 bfd_size_type *text_size;
1043 struct internal_exec *execp = exec_hdr (abfd);
1045 if (! NAME(aout,make_sections) (abfd))
1048 if (adata(abfd).magic != undecided_magic)
1051 obj_textsec(abfd)->_raw_size =
1052 align_power(obj_textsec(abfd)->_raw_size,
1053 obj_textsec(abfd)->alignment_power);
1055 *text_size = obj_textsec (abfd)->_raw_size;
1056 /* Rule (heuristic) for when to pad to a new page. Note that there
1057 are (at least) two ways demand-paged (ZMAGIC) files have been
1058 handled. Most Berkeley-based systems start the text segment at
1059 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1060 segment right after the exec header; the latter is counted in the
1061 text segment size, and is paged in by the kernel with the rest of
1064 /* This perhaps isn't the right way to do this, but made it simpler for me
1065 to understand enough to implement it. Better would probably be to go
1066 right from BFD flags to alignment/positioning characteristics. But the
1067 old code was sloppy enough about handling the flags, and had enough
1068 other magic, that it was a little hard for me to understand. I think
1069 I understand it better now, but I haven't time to do the cleanup this
1072 if (abfd->flags & D_PAGED)
1073 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1074 adata(abfd).magic = z_magic;
1075 else if (abfd->flags & WP_TEXT)
1076 adata(abfd).magic = n_magic;
1078 adata(abfd).magic = o_magic;
1080 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1082 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1084 switch (adata(abfd).magic) {
1085 case n_magic: str = "NMAGIC"; break;
1086 case o_magic: str = "OMAGIC"; break;
1087 case z_magic: str = "ZMAGIC"; break;
1092 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1093 obj_textsec(abfd)->alignment_power,
1094 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1095 obj_datasec(abfd)->alignment_power,
1096 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
1097 obj_bsssec(abfd)->alignment_power);
1101 switch (adata(abfd).magic)
1104 adjust_o_magic (abfd, execp);
1107 adjust_z_magic (abfd, execp);
1110 adjust_n_magic (abfd, execp);
1116 #ifdef BFD_AOUT_DEBUG
1117 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1118 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1119 obj_textsec(abfd)->filepos,
1120 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1121 obj_datasec(abfd)->filepos,
1122 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
1130 aout_@var{size}_new_section_hook
1133 boolean aout_@var{size}_new_section_hook,
1135 asection *newsect));
1138 Called by the BFD in response to a @code{bfd_make_section}
1142 NAME(aout,new_section_hook) (abfd, newsect)
1146 /* align to double at least */
1147 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1150 if (bfd_get_format (abfd) == bfd_object)
1152 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1153 obj_textsec(abfd)= newsect;
1154 newsect->target_index = N_TEXT;
1158 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1159 obj_datasec(abfd) = newsect;
1160 newsect->target_index = N_DATA;
1164 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1165 obj_bsssec(abfd) = newsect;
1166 newsect->target_index = N_BSS;
1172 /* We allow more than three sections internally */
1177 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1182 bfd_size_type count;
1185 bfd_size_type text_size;
1187 if (! abfd->output_has_begun)
1189 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1193 if (section == obj_bsssec (abfd))
1195 bfd_set_error (bfd_error_no_contents);
1199 if (section != obj_textsec (abfd)
1200 && section != obj_datasec (abfd))
1202 bfd_set_error (bfd_error_nonrepresentable_section);
1208 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1209 || bfd_write (location, 1, count, abfd) != count)
1216 /* Read the external symbols from an a.out file. */
1219 aout_get_external_symbols (abfd)
1222 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1224 bfd_size_type count;
1225 struct external_nlist *syms;
1227 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1229 /* We allocate using malloc to make the values easy to free
1230 later on. If we put them on the obstack it might not be
1231 possible to free them. */
1232 syms = ((struct external_nlist *)
1233 malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1234 if (syms == (struct external_nlist *) NULL && count != 0)
1236 bfd_set_error (bfd_error_no_memory);
1240 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1241 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1242 != exec_hdr (abfd)->a_syms))
1248 obj_aout_external_syms (abfd) = syms;
1249 obj_aout_external_sym_count (abfd) = count;
1252 if (obj_aout_external_strings (abfd) == NULL
1253 && exec_hdr (abfd)->a_syms != 0)
1255 unsigned char string_chars[BYTES_IN_WORD];
1256 bfd_size_type stringsize;
1259 /* Get the size of the strings. */
1260 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1261 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1264 stringsize = GET_WORD (abfd, string_chars);
1266 strings = (char *) malloc ((size_t) stringsize + 1);
1267 if (strings == NULL)
1269 bfd_set_error (bfd_error_no_memory);
1273 /* Skip space for the string count in the buffer for convenience
1274 when using indexes. */
1275 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1277 != stringsize - BYTES_IN_WORD)
1283 /* Ensure that a zero index yields an empty string. */
1286 /* Sanity preservation. */
1287 strings[stringsize] = '\0';
1289 obj_aout_external_strings (abfd) = strings;
1290 obj_aout_external_string_size (abfd) = stringsize;
1296 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1297 and symbol->value fields of CACHE_PTR will be set from the a.out
1298 nlist structure. This function is responsible for setting
1299 symbol->flags and symbol->section, and adjusting symbol->value. */
1302 translate_from_native_sym_flags (abfd, cache_ptr)
1304 aout_symbol_type *cache_ptr;
1308 if ((cache_ptr->type & N_STAB) != 0
1309 || cache_ptr->type == N_FN)
1313 /* This is a debugging symbol. */
1315 cache_ptr->symbol.flags = BSF_DEBUGGING;
1317 /* Work out the symbol section. */
1318 switch (cache_ptr->type & N_TYPE)
1322 sec = obj_textsec (abfd);
1325 sec = obj_datasec (abfd);
1328 sec = obj_bsssec (abfd);
1332 sec = bfd_abs_section_ptr;
1336 cache_ptr->symbol.section = sec;
1337 cache_ptr->symbol.value -= sec->vma;
1342 /* Get the default visibility. This does not apply to all types, so
1343 we just hold it in a local variable to use if wanted. */
1344 if ((cache_ptr->type & N_EXT) == 0)
1345 visible = BSF_LOCAL;
1347 visible = BSF_GLOBAL;
1349 switch (cache_ptr->type)
1352 case N_ABS: case N_ABS | N_EXT:
1353 cache_ptr->symbol.section = bfd_abs_section_ptr;
1354 cache_ptr->symbol.flags = visible;
1357 case N_UNDF | N_EXT:
1358 if (cache_ptr->symbol.value != 0)
1360 /* This is a common symbol. */
1361 cache_ptr->symbol.flags = BSF_GLOBAL;
1362 cache_ptr->symbol.section = bfd_com_section_ptr;
1366 cache_ptr->symbol.flags = 0;
1367 cache_ptr->symbol.section = bfd_und_section_ptr;
1371 case N_TEXT: case N_TEXT | N_EXT:
1372 cache_ptr->symbol.section = obj_textsec (abfd);
1373 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1374 cache_ptr->symbol.flags = visible;
1377 /* N_SETV symbols used to represent set vectors placed in the
1378 data section. They are no longer generated. Theoretically,
1379 it was possible to extract the entries and combine them with
1380 new ones, although I don't know if that was ever actually
1381 done. Unless that feature is restored, treat them as data
1383 case N_SETV: case N_SETV | N_EXT:
1384 case N_DATA: case N_DATA | N_EXT:
1385 cache_ptr->symbol.section = obj_datasec (abfd);
1386 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1387 cache_ptr->symbol.flags = visible;
1390 case N_BSS: case N_BSS | N_EXT:
1391 cache_ptr->symbol.section = obj_bsssec (abfd);
1392 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1393 cache_ptr->symbol.flags = visible;
1396 case N_SETA: case N_SETA | N_EXT:
1397 case N_SETT: case N_SETT | N_EXT:
1398 case N_SETD: case N_SETD | N_EXT:
1399 case N_SETB: case N_SETB | N_EXT:
1402 arelent_chain *reloc;
1403 asection *into_section;
1405 /* This is a set symbol. The name of the symbol is the name
1406 of the set (e.g., __CTOR_LIST__). The value of the symbol
1407 is the value to add to the set. We create a section with
1408 the same name as the symbol, and add a reloc to insert the
1409 appropriate value into the section.
1411 This action is actually obsolete; it used to make the
1412 linker do the right thing, but the linker no longer uses
1415 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1416 if (section == NULL)
1420 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1423 bfd_set_error (bfd_error_no_memory);
1427 strcpy (copy, cache_ptr->symbol.name);
1428 section = bfd_make_section (abfd, copy);
1429 if (section == NULL)
1433 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1436 bfd_set_error (bfd_error_no_memory);
1440 /* Build a relocation entry for the constructor. */
1441 switch (cache_ptr->type & N_TYPE)
1444 into_section = bfd_abs_section_ptr;
1445 cache_ptr->type = N_ABS;
1448 into_section = obj_textsec (abfd);
1449 cache_ptr->type = N_TEXT;
1452 into_section = obj_datasec (abfd);
1453 cache_ptr->type = N_DATA;
1456 into_section = obj_bsssec (abfd);
1457 cache_ptr->type = N_BSS;
1461 /* Build a relocation pointing into the constructor section
1462 pointing at the symbol in the set vector specified. */
1463 reloc->relent.addend = cache_ptr->symbol.value;
1464 cache_ptr->symbol.section = into_section;
1465 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1467 /* We modify the symbol to belong to a section depending upon
1468 the name of the symbol, and add to the size of the section
1469 to contain a pointer to the symbol. Build a reloc entry to
1470 relocate to this symbol attached to this section. */
1471 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1473 section->reloc_count++;
1474 section->alignment_power = 2;
1476 reloc->next = section->constructor_chain;
1477 section->constructor_chain = reloc;
1478 reloc->relent.address = section->_raw_size;
1479 section->_raw_size += BYTES_IN_WORD;
1481 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd);
1483 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1488 /* This symbol is the text of a warning message. The next
1489 symbol is the symbol to associate the warning with. If a
1490 reference is made to that symbol, a warning is issued. */
1491 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1492 cache_ptr->symbol.section = bfd_abs_section_ptr;
1495 case N_INDR: case N_INDR | N_EXT:
1496 /* An indirect symbol. This consists of two symbols in a row.
1497 The first symbol is the name of the indirection. The second
1498 symbol is the name of the target. A reference to the first
1499 symbol becomes a reference to the second. */
1500 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1501 cache_ptr->symbol.section = bfd_ind_section_ptr;
1505 cache_ptr->symbol.section = bfd_und_section_ptr;
1506 cache_ptr->symbol.flags = BSF_WEAK;
1510 cache_ptr->symbol.section = bfd_abs_section_ptr;
1511 cache_ptr->symbol.flags = BSF_WEAK;
1515 cache_ptr->symbol.section = obj_textsec (abfd);
1516 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1517 cache_ptr->symbol.flags = BSF_WEAK;
1521 cache_ptr->symbol.section = obj_datasec (abfd);
1522 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1523 cache_ptr->symbol.flags = BSF_WEAK;
1527 cache_ptr->symbol.section = obj_bsssec (abfd);
1528 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1529 cache_ptr->symbol.flags = BSF_WEAK;
1536 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1539 translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1542 struct external_nlist *sym_pointer;
1544 bfd_vma value = cache_ptr->value;
1548 /* Mask out any existing type bits in case copying from one section
1550 sym_pointer->e_type[0] &= ~N_TYPE;
1552 sec = bfd_get_section (cache_ptr);
1557 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1559 bfd_set_error (bfd_error_nonrepresentable_section);
1563 if (sec->output_section != NULL)
1565 off = sec->output_offset;
1566 sec = sec->output_section;
1569 if (bfd_is_abs_section (sec))
1570 sym_pointer->e_type[0] |= N_ABS;
1571 else if (sec == obj_textsec (abfd))
1572 sym_pointer->e_type[0] |= N_TEXT;
1573 else if (sec == obj_datasec (abfd))
1574 sym_pointer->e_type[0] |= N_DATA;
1575 else if (sec == obj_bsssec (abfd))
1576 sym_pointer->e_type[0] |= N_BSS;
1577 else if (bfd_is_und_section (sec))
1578 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1579 else if (bfd_is_ind_section (sec))
1580 sym_pointer->e_type[0] = N_INDR;
1581 else if (bfd_is_com_section (sec))
1582 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1585 bfd_set_error (bfd_error_nonrepresentable_section);
1589 /* Turn the symbol from section relative to absolute again */
1590 value += sec->vma + off;
1592 if ((cache_ptr->flags & BSF_WARNING) != 0)
1593 sym_pointer->e_type[0] = N_WARNING;
1595 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1596 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1597 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1598 sym_pointer->e_type[0] |= N_EXT;
1600 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1602 int type = ((aout_symbol_type *) cache_ptr)->type;
1605 case N_ABS: type = N_SETA; break;
1606 case N_TEXT: type = N_SETT; break;
1607 case N_DATA: type = N_SETD; break;
1608 case N_BSS: type = N_SETB; break;
1610 sym_pointer->e_type[0] = type;
1613 if ((cache_ptr->flags & BSF_WEAK) != 0)
1617 switch (sym_pointer->e_type[0] & N_TYPE)
1620 case N_ABS: type = N_WEAKA; break;
1621 case N_TEXT: type = N_WEAKT; break;
1622 case N_DATA: type = N_WEAKD; break;
1623 case N_BSS: type = N_WEAKB; break;
1624 case N_UNDF: type = N_WEAKU; break;
1626 sym_pointer->e_type[0] = type;
1629 PUT_WORD(abfd, value, sym_pointer->e_value);
1634 /* Native-level interface to symbols. */
1637 NAME(aout,make_empty_symbol) (abfd)
1640 aout_symbol_type *new =
1641 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1644 bfd_set_error (bfd_error_no_memory);
1647 new->symbol.the_bfd = abfd;
1649 return &new->symbol;
1652 /* Translate a set of internal symbols into external symbols. */
1655 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1657 aout_symbol_type *in;
1658 struct external_nlist *ext;
1659 bfd_size_type count;
1661 bfd_size_type strsize;
1664 struct external_nlist *ext_end;
1666 ext_end = ext + count;
1667 for (; ext < ext_end; ext++, in++)
1671 x = GET_WORD (abfd, ext->e_strx);
1672 in->symbol.the_bfd = abfd;
1674 /* For the normal symbols, the zero index points at the number
1675 of bytes in the string table but is to be interpreted as the
1676 null string. For the dynamic symbols, the number of bytes in
1677 the string table is stored in the __DYNAMIC structure and the
1678 zero index points at an actual string. */
1679 if (x == 0 && ! dynamic)
1680 in->symbol.name = "";
1681 else if (x < strsize)
1682 in->symbol.name = str + x;
1686 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1687 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1688 in->other = bfd_h_get_8 (abfd, ext->e_other);
1689 in->type = bfd_h_get_8 (abfd, ext->e_type);
1690 in->symbol.udata.p = NULL;
1692 if (! translate_from_native_sym_flags (abfd, in))
1696 in->symbol.flags |= BSF_DYNAMIC;
1702 /* We read the symbols into a buffer, which is discarded when this
1703 function exits. We read the strings into a buffer large enough to
1704 hold them all plus all the cached symbol entries. */
1707 NAME(aout,slurp_symbol_table) (abfd)
1710 struct external_nlist *old_external_syms;
1711 aout_symbol_type *cached;
1714 /* If there's no work to be done, don't do any */
1715 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1718 old_external_syms = obj_aout_external_syms (abfd);
1720 if (! aout_get_external_symbols (abfd))
1723 cached_size = (obj_aout_external_sym_count (abfd)
1724 * sizeof (aout_symbol_type));
1725 cached = (aout_symbol_type *) malloc (cached_size);
1726 if (cached == NULL && cached_size != 0)
1728 bfd_set_error (bfd_error_no_memory);
1731 if (cached_size != 0)
1732 memset (cached, 0, cached_size);
1734 /* Convert from external symbol information to internal. */
1735 if (! (NAME(aout,translate_symbol_table)
1737 obj_aout_external_syms (abfd),
1738 obj_aout_external_sym_count (abfd),
1739 obj_aout_external_strings (abfd),
1740 obj_aout_external_string_size (abfd),
1747 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1749 obj_aout_symbols (abfd) = cached;
1751 /* It is very likely that anybody who calls this function will not
1752 want the external symbol information, so if it was allocated
1753 because of our call to aout_get_external_symbols, we free it up
1754 right away to save space. */
1755 if (old_external_syms == (struct external_nlist *) NULL
1756 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1758 free (obj_aout_external_syms (abfd));
1759 obj_aout_external_syms (abfd) = NULL;
1765 /* We use a hash table when writing out symbols so that we only write
1766 out a particular string once. This helps particularly when the
1767 linker writes out stabs debugging entries, because each different
1768 contributing object file tends to have many duplicate stabs
1771 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1772 if BFD_TRADITIONAL_FORMAT is set. */
1774 static bfd_size_type add_to_stringtab
1775 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean));
1776 static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *));
1778 /* Get the index of a string in a strtab, adding it if it is not
1781 static INLINE bfd_size_type
1782 add_to_stringtab (abfd, tab, str, copy)
1784 struct bfd_strtab_hash *tab;
1789 bfd_size_type index;
1791 /* An index of 0 always means the empty string. */
1792 if (str == 0 || *str == '\0')
1795 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1796 doesn't understand a hashed string table. */
1798 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1801 index = _bfd_stringtab_add (tab, str, hash, copy);
1803 if (index != (bfd_size_type) -1)
1805 /* Add BYTES_IN_WORD to the return value to account for the
1806 space taken up by the string table size. */
1807 index += BYTES_IN_WORD;
1813 /* Write out a strtab. ABFD is already at the right location in the
1817 emit_stringtab (abfd, tab)
1819 struct bfd_strtab_hash *tab;
1821 bfd_byte buffer[BYTES_IN_WORD];
1823 /* The string table starts with the size. */
1824 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1825 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1828 return _bfd_stringtab_emit (abfd, tab);
1832 NAME(aout,write_syms) (abfd)
1835 unsigned int count ;
1836 asymbol **generic = bfd_get_outsymbols (abfd);
1837 struct bfd_strtab_hash *strtab;
1839 strtab = _bfd_stringtab_init ();
1843 for (count = 0; count < bfd_get_symcount (abfd); count++)
1845 asymbol *g = generic[count];
1847 struct external_nlist nsp;
1849 indx = add_to_stringtab (abfd, strtab, g->name, false);
1850 if (indx == (bfd_size_type) -1)
1852 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1854 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
1856 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
1857 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
1858 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
1862 bfd_h_put_16(abfd,0, nsp.e_desc);
1863 bfd_h_put_8(abfd, 0, nsp.e_other);
1864 bfd_h_put_8(abfd, 0, nsp.e_type);
1867 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1870 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
1871 != EXTERNAL_NLIST_SIZE)
1874 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1875 here, at the end. */
1879 if (! emit_stringtab (abfd, strtab))
1882 _bfd_stringtab_free (strtab);
1887 _bfd_stringtab_free (strtab);
1893 NAME(aout,get_symtab) (abfd, location)
1897 unsigned int counter = 0;
1898 aout_symbol_type *symbase;
1900 if (!NAME(aout,slurp_symbol_table)(abfd))
1903 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
1904 *(location++) = (asymbol *)( symbase++);
1906 return bfd_get_symcount (abfd);
1910 /* Standard reloc stuff */
1911 /* Output standard relocation information to a file in target byte order. */
1914 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
1917 struct reloc_std_external *natptr;
1920 asymbol *sym = *(g->sym_ptr_ptr);
1922 unsigned int r_length;
1924 int r_baserel, r_jmptable, r_relative;
1925 asection *output_section = sym->section->output_section;
1927 PUT_WORD(abfd, g->address, natptr->r_address);
1929 r_length = g->howto->size ; /* Size as a power of two */
1930 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1931 /* XXX This relies on relocs coming from a.out files. */
1932 r_baserel = (g->howto->type & 8) != 0;
1933 r_jmptable = (g->howto->type & 16) != 0;
1934 r_relative = (g->howto->type & 32) != 0;
1937 /* For a standard reloc, the addend is in the object file. */
1938 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
1941 /* name was clobbered by aout_write_syms to be symbol index */
1943 /* If this relocation is relative to a symbol then set the
1944 r_index to the symbols index, and the r_extern bit.
1946 Absolute symbols can come in in two ways, either as an offset
1947 from the abs section, or as a symbol which has an abs value.
1952 if (bfd_is_com_section (output_section)
1953 || bfd_is_abs_section (output_section)
1954 || bfd_is_und_section (output_section))
1956 if (bfd_abs_section_ptr->symbol == sym)
1958 /* Whoops, looked like an abs symbol, but is really an offset
1959 from the abs section */
1965 /* Fill in symbol */
1967 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1973 /* Just an ordinary section */
1975 r_index = output_section->target_index;
1978 /* now the fun stuff */
1979 if (abfd->xvec->header_byteorder_big_p != false) {
1980 natptr->r_index[0] = r_index >> 16;
1981 natptr->r_index[1] = r_index >> 8;
1982 natptr->r_index[2] = r_index;
1984 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
1985 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
1986 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
1987 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
1988 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
1989 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
1991 natptr->r_index[2] = r_index >> 16;
1992 natptr->r_index[1] = r_index >> 8;
1993 natptr->r_index[0] = r_index;
1995 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
1996 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
1997 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
1998 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
1999 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2000 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2005 /* Extended stuff */
2006 /* Output extended relocation information to a file in target byte order. */
2009 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2012 register struct reloc_ext_external *natptr;
2016 unsigned int r_type;
2017 unsigned int r_addend;
2018 asymbol *sym = *(g->sym_ptr_ptr);
2019 asection *output_section = sym->section->output_section;
2021 PUT_WORD (abfd, g->address, natptr->r_address);
2023 r_type = (unsigned int) g->howto->type;
2025 r_addend = g->addend;
2026 if ((sym->flags & BSF_SECTION_SYM) != 0)
2027 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2029 /* If this relocation is relative to a symbol then set the
2030 r_index to the symbols index, and the r_extern bit.
2032 Absolute symbols can come in in two ways, either as an offset
2033 from the abs section, or as a symbol which has an abs value.
2034 check for that here. */
2036 if (bfd_is_abs_section (bfd_get_section (sym)))
2041 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2043 if (bfd_is_und_section (bfd_get_section (sym))
2044 || (sym->flags & BSF_GLOBAL) != 0)
2048 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2052 /* Just an ordinary section */
2054 r_index = output_section->target_index;
2057 /* now the fun stuff */
2058 if (abfd->xvec->header_byteorder_big_p != false) {
2059 natptr->r_index[0] = r_index >> 16;
2060 natptr->r_index[1] = r_index >> 8;
2061 natptr->r_index[2] = r_index;
2063 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2064 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2066 natptr->r_index[2] = r_index >> 16;
2067 natptr->r_index[1] = r_index >> 8;
2068 natptr->r_index[0] = r_index;
2070 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2071 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2074 PUT_WORD (abfd, r_addend, natptr->r_addend);
2077 /* BFD deals internally with all things based from the section they're
2078 in. so, something in 10 bytes into a text section with a base of
2079 50 would have a symbol (.text+10) and know .text vma was 50.
2081 Aout keeps all it's symbols based from zero, so the symbol would
2082 contain 60. This macro subs the base of each section from the value
2083 to give the true offset from the section */
2086 #define MOVE_ADDRESS(ad) \
2088 /* undefined symbol */ \
2089 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2090 cache_ptr->addend = ad; \
2092 /* defined, section relative. replace symbol with pointer to \
2093 symbol which points to section */ \
2094 switch (r_index) { \
2096 case N_TEXT | N_EXT: \
2097 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2098 cache_ptr->addend = ad - su->textsec->vma; \
2101 case N_DATA | N_EXT: \
2102 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2103 cache_ptr->addend = ad - su->datasec->vma; \
2106 case N_BSS | N_EXT: \
2107 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2108 cache_ptr->addend = ad - su->bsssec->vma; \
2112 case N_ABS | N_EXT: \
2113 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2114 cache_ptr->addend = ad; \
2120 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2122 struct reloc_ext_external *bytes;
2125 bfd_size_type symcount;
2127 unsigned int r_index;
2129 unsigned int r_type;
2130 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2132 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2134 /* now the fun stuff */
2135 if (abfd->xvec->header_byteorder_big_p != false) {
2136 r_index = (bytes->r_index[0] << 16)
2137 | (bytes->r_index[1] << 8)
2138 | bytes->r_index[2];
2139 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2140 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2141 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2143 r_index = (bytes->r_index[2] << 16)
2144 | (bytes->r_index[1] << 8)
2145 | bytes->r_index[0];
2146 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2147 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2148 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2151 cache_ptr->howto = howto_table_ext + r_type;
2153 /* Base relative relocs are always against the symbol table,
2154 regardless of the setting of r_extern. r_extern just reflects
2155 whether the symbol the reloc is against is local or global. */
2156 if (r_type == RELOC_BASE10
2157 || r_type == RELOC_BASE13
2158 || r_type == RELOC_BASE22)
2161 if (r_extern && r_index > symcount)
2163 /* We could arrange to return an error, but it might be useful
2164 to see the file even if it is bad. */
2169 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2173 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2175 struct reloc_std_external *bytes;
2178 bfd_size_type symcount;
2180 unsigned int r_index;
2182 unsigned int r_length;
2184 int r_baserel, r_jmptable, r_relative;
2185 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2186 unsigned int howto_idx;
2188 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2190 /* now the fun stuff */
2191 if (abfd->xvec->header_byteorder_big_p != false) {
2192 r_index = (bytes->r_index[0] << 16)
2193 | (bytes->r_index[1] << 8)
2194 | bytes->r_index[2];
2195 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2196 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2197 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2198 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2199 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2200 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2201 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2203 r_index = (bytes->r_index[2] << 16)
2204 | (bytes->r_index[1] << 8)
2205 | bytes->r_index[0];
2206 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2207 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2208 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2209 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2210 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2211 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2212 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2215 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2216 + 16 * r_jmptable + 32 * r_relative;
2217 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2218 cache_ptr->howto = howto_table_std + howto_idx;
2219 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2221 /* Base relative relocs are always against the symbol table,
2222 regardless of the setting of r_extern. r_extern just reflects
2223 whether the symbol the reloc is against is local or global. */
2227 if (r_extern && r_index > symcount)
2229 /* We could arrange to return an error, but it might be useful
2230 to see the file even if it is bad. */
2238 /* Read and swap the relocs for a section. */
2241 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2247 bfd_size_type reloc_size;
2249 arelent *reloc_cache;
2251 unsigned int counter = 0;
2254 if (asect->relocation)
2257 if (asect->flags & SEC_CONSTRUCTOR)
2260 if (asect == obj_datasec (abfd))
2261 reloc_size = exec_hdr(abfd)->a_drsize;
2262 else if (asect == obj_textsec (abfd))
2263 reloc_size = exec_hdr(abfd)->a_trsize;
2264 else if (asect == obj_bsssec (abfd))
2268 bfd_set_error (bfd_error_invalid_operation);
2272 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2275 each_size = obj_reloc_entry_size (abfd);
2277 count = reloc_size / each_size;
2279 reloc_cache = (arelent *) malloc ((size_t) (count * sizeof (arelent)));
2280 if (reloc_cache == NULL && count != 0)
2282 bfd_set_error (bfd_error_no_memory);
2285 memset (reloc_cache, 0, count * sizeof (arelent));
2287 relocs = malloc ((size_t) reloc_size);
2288 if (relocs == NULL && reloc_size != 0)
2291 bfd_set_error (bfd_error_no_memory);
2295 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2302 cache_ptr = reloc_cache;
2303 if (each_size == RELOC_EXT_SIZE)
2305 register struct reloc_ext_external *rptr =
2306 (struct reloc_ext_external *) relocs;
2308 for (; counter < count; counter++, rptr++, cache_ptr++)
2309 NAME(aout,swap_ext_reloc_in) (abfd, rptr, cache_ptr, symbols,
2310 bfd_get_symcount (abfd));
2314 register struct reloc_std_external *rptr =
2315 (struct reloc_std_external *) relocs;
2317 for (; counter < count; counter++, rptr++, cache_ptr++)
2318 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2319 bfd_get_symcount (abfd));
2324 asect->relocation = reloc_cache;
2325 asect->reloc_count = cache_ptr - reloc_cache;
2330 /* Write out a relocation section into an object file. */
2333 NAME(aout,squirt_out_relocs) (abfd, section)
2338 unsigned char *native, *natptr;
2341 unsigned int count = section->reloc_count;
2344 if (count == 0) return true;
2346 each_size = obj_reloc_entry_size (abfd);
2347 natsize = each_size * count;
2348 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2350 bfd_set_error (bfd_error_no_memory);
2354 generic = section->orelocation;
2356 if (each_size == RELOC_EXT_SIZE)
2358 for (natptr = native;
2360 --count, natptr += each_size, ++generic)
2361 NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr);
2365 for (natptr = native;
2367 --count, natptr += each_size, ++generic)
2368 MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr);
2371 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
2372 bfd_release(abfd, native);
2375 bfd_release (abfd, native);
2380 /* This is stupid. This function should be a boolean predicate */
2382 NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2388 arelent *tblptr = section->relocation;
2391 if (section == obj_bsssec (abfd))
2397 if (!(tblptr || NAME(aout,slurp_reloc_table)(abfd, section, symbols)))
2400 if (section->flags & SEC_CONSTRUCTOR) {
2401 arelent_chain *chain = section->constructor_chain;
2402 for (count = 0; count < section->reloc_count; count ++) {
2403 *relptr ++ = &chain->relent;
2404 chain = chain->next;
2408 tblptr = section->relocation;
2410 for (count = 0; count++ < section->reloc_count;)
2412 *relptr++ = tblptr++;
2417 return section->reloc_count;
2421 NAME(aout,get_reloc_upper_bound) (abfd, asect)
2425 if (bfd_get_format (abfd) != bfd_object) {
2426 bfd_set_error (bfd_error_invalid_operation);
2429 if (asect->flags & SEC_CONSTRUCTOR) {
2430 return (sizeof (arelent *) * (asect->reloc_count+1));
2433 if (asect == obj_datasec (abfd))
2434 return (sizeof (arelent *)
2435 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
2438 if (asect == obj_textsec (abfd))
2439 return (sizeof (arelent *)
2440 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
2443 if (asect == obj_bsssec (abfd))
2444 return sizeof (arelent *);
2446 if (asect == obj_bsssec (abfd))
2449 bfd_set_error (bfd_error_invalid_operation);
2455 NAME(aout,get_symtab_upper_bound) (abfd)
2458 if (!NAME(aout,slurp_symbol_table)(abfd))
2461 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2466 NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
2468 asymbol *ignore_symbol;
2470 return (alent *)NULL;
2475 NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
2480 bfd_symbol_info (symbol, ret);
2482 if (ret->type == '?')
2484 int type_code = aout_symbol(symbol)->type & 0xff;
2485 CONST char *stab_name = aout_stab_name(type_code);
2486 static char buf[10];
2488 if (stab_name == NULL)
2490 sprintf(buf, "(%d)", type_code);
2494 ret->stab_other = (unsigned)(aout_symbol(symbol)->other & 0xff);
2495 ret->stab_desc = (unsigned)(aout_symbol(symbol)->desc & 0xffff);
2496 ret->stab_name = stab_name;
2502 NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
2506 bfd_print_symbol_type how;
2508 FILE *file = (FILE *)afile;
2511 case bfd_print_symbol_name:
2513 fprintf(file,"%s", symbol->name);
2515 case bfd_print_symbol_more:
2516 fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff),
2517 (unsigned)(aout_symbol(symbol)->other & 0xff),
2518 (unsigned)(aout_symbol(symbol)->type));
2520 case bfd_print_symbol_all:
2522 CONST char *section_name = symbol->section->name;
2525 bfd_print_symbol_vandf((PTR)file,symbol);
2527 fprintf(file," %-5s %04x %02x %02x",
2529 (unsigned)(aout_symbol(symbol)->desc & 0xffff),
2530 (unsigned)(aout_symbol(symbol)->other & 0xff),
2531 (unsigned)(aout_symbol(symbol)->type & 0xff));
2533 fprintf(file," %s", symbol->name);
2539 /* If we don't have to allocate more than 1MB to hold the generic
2540 symbols, we use the generic minisymbol methord: it's faster, since
2541 it only translates the symbols once, not multiple times. */
2542 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2544 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2545 symbols. The minisymbol_to_symbol function translates these into
2546 BFD asymbol structures. */
2549 NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2553 unsigned int *sizep;
2557 /* We could handle the dynamic symbols here as well, but it's
2558 easier to hand them off. */
2559 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2562 if (! aout_get_external_symbols (abfd))
2565 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2566 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2568 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2570 /* By passing the external symbols back from this routine, we are
2571 giving up control over the memory block. Clear
2572 obj_aout_external_syms, so that we do not try to free it
2574 obj_aout_external_syms (abfd) = NULL;
2576 *sizep = EXTERNAL_NLIST_SIZE;
2577 return obj_aout_external_sym_count (abfd);
2580 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2581 unmodified a.out symbol. The SYM argument is a structure returned
2582 by bfd_make_empty_symbol, which we fill in here. */
2585 NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2592 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2593 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2595 memset (sym, 0, sizeof (aout_symbol_type));
2597 /* We call translate_symbol_table to translate a single symbol. */
2598 if (! (NAME(aout,translate_symbol_table)
2600 (aout_symbol_type *) sym,
2601 (struct external_nlist *) minisym,
2603 obj_aout_external_strings (abfd),
2604 obj_aout_external_string_size (abfd),
2612 provided a BFD, a section and an offset into the section, calculate
2613 and return the name of the source file and the line nearest to the
2618 NAME(aout,find_nearest_line)
2619 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2624 CONST char **filename_ptr;
2625 CONST char **functionname_ptr;
2626 unsigned int *line_ptr;
2628 /* Run down the file looking for the filename, function and linenumber */
2630 CONST char *directory_name = NULL;
2631 CONST char *main_file_name = NULL;
2632 CONST char *current_file_name = NULL;
2633 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2634 bfd_vma low_line_vma = 0;
2635 bfd_vma low_func_vma = 0;
2637 size_t filelen, funclen;
2640 *filename_ptr = abfd->filename;
2641 *functionname_ptr = 0;
2643 if (symbols != (asymbol **)NULL) {
2644 for (p = symbols; *p; p++) {
2645 aout_symbol_type *q = (aout_symbol_type *)(*p);
2649 main_file_name = current_file_name = q->symbol.name;
2650 /* Look ahead to next symbol to check if that too is an N_SO. */
2654 q = (aout_symbol_type *)(*p);
2655 if (q->type != (int)N_SO)
2658 /* Found a second N_SO First is directory; second is filename. */
2659 directory_name = current_file_name;
2660 main_file_name = current_file_name = q->symbol.name;
2661 if (obj_textsec(abfd) != section)
2665 current_file_name = q->symbol.name;
2672 /* We'll keep this if it resolves nearer than the one we have
2674 if (q->symbol.value >= low_line_vma
2675 && q->symbol.value <= offset)
2677 *line_ptr = q->desc;
2678 low_line_vma = q->symbol.value;
2679 line_file_name = current_file_name;
2684 /* We'll keep this if it is nearer than the one we have already */
2685 if (q->symbol.value >= low_func_vma &&
2686 q->symbol.value <= offset) {
2687 low_func_vma = q->symbol.value;
2688 func = (asymbol *)q;
2690 else if (q->symbol.value > offset)
2700 main_file_name = line_file_name;
2702 if (main_file_name == NULL
2703 || main_file_name[0] == '/'
2704 || directory_name == NULL)
2707 filelen = strlen (directory_name) + strlen (main_file_name);
2711 funclen = strlen (bfd_asymbol_name (func));
2713 if (adata (abfd).line_buf != NULL)
2714 free (adata (abfd).line_buf);
2715 if (filelen + funclen == 0)
2716 adata (abfd).line_buf = buf = NULL;
2719 adata (abfd).line_buf = buf = (char *) malloc (filelen + funclen + 2);
2720 if (adata (abfd).line_buf == NULL)
2722 bfd_set_error (bfd_error_no_memory);
2727 if (main_file_name != NULL)
2729 if (main_file_name[0] == '/' || directory_name == NULL)
2730 *filename_ptr = main_file_name;
2733 sprintf (buf, "%s%s", directory_name, main_file_name);
2734 *filename_ptr = buf;
2741 const char *function = func->name;
2744 /* The caller expects a symbol name. We actually have a
2745 function name, without the leading underscore. Put the
2746 underscore back in, so that the caller gets a symbol name. */
2747 if (bfd_get_symbol_leading_char (abfd) == '\0')
2748 strcpy (buf, function);
2751 buf[0] = bfd_get_symbol_leading_char (abfd);
2752 strcpy (buf + 1, function);
2754 /* Have to remove : stuff */
2755 p = strchr (buf, ':');
2758 *functionname_ptr = buf;
2766 NAME(aout,sizeof_headers) (abfd, execable)
2770 return adata(abfd).exec_bytes_size;
2773 /* Free all information we have cached for this BFD. We can always
2774 read it again later if we need it. */
2777 NAME(aout,bfd_free_cached_info) (abfd)
2782 if (bfd_get_format (abfd) != bfd_object)
2785 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2786 BFCI_FREE (obj_aout_symbols (abfd));
2787 BFCI_FREE (obj_aout_external_syms (abfd));
2788 BFCI_FREE (obj_aout_external_strings (abfd));
2789 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2790 BFCI_FREE (o->relocation);
2796 /* a.out link code. */
2798 static boolean aout_link_add_object_symbols
2799 PARAMS ((bfd *, struct bfd_link_info *));
2800 static boolean aout_link_check_archive_element
2801 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2802 static boolean aout_link_free_symbols PARAMS ((bfd *));
2803 static boolean aout_link_check_ar_symbols
2804 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2805 static boolean aout_link_add_symbols
2806 PARAMS ((bfd *, struct bfd_link_info *));
2808 /* Routine to create an entry in an a.out link hash table. */
2810 struct bfd_hash_entry *
2811 NAME(aout,link_hash_newfunc) (entry, table, string)
2812 struct bfd_hash_entry *entry;
2813 struct bfd_hash_table *table;
2816 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2818 /* Allocate the structure if it has not already been allocated by a
2820 if (ret == (struct aout_link_hash_entry *) NULL)
2821 ret = ((struct aout_link_hash_entry *)
2822 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2823 if (ret == (struct aout_link_hash_entry *) NULL)
2825 bfd_set_error (bfd_error_no_memory);
2826 return (struct bfd_hash_entry *) ret;
2829 /* Call the allocation method of the superclass. */
2830 ret = ((struct aout_link_hash_entry *)
2831 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2835 /* Set local fields. */
2836 ret->written = false;
2840 return (struct bfd_hash_entry *) ret;
2843 /* Initialize an a.out link hash table. */
2846 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2847 struct aout_link_hash_table *table;
2849 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2850 struct bfd_hash_table *,
2853 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2856 /* Create an a.out link hash table. */
2858 struct bfd_link_hash_table *
2859 NAME(aout,link_hash_table_create) (abfd)
2862 struct aout_link_hash_table *ret;
2864 ret = ((struct aout_link_hash_table *)
2865 bfd_alloc (abfd, sizeof (struct aout_link_hash_table)));
2868 bfd_set_error (bfd_error_no_memory);
2869 return (struct bfd_link_hash_table *) NULL;
2871 if (! NAME(aout,link_hash_table_init) (ret, abfd,
2872 NAME(aout,link_hash_newfunc)))
2875 return (struct bfd_link_hash_table *) NULL;
2880 /* Given an a.out BFD, add symbols to the global hash table as
2884 NAME(aout,link_add_symbols) (abfd, info)
2886 struct bfd_link_info *info;
2888 switch (bfd_get_format (abfd))
2891 return aout_link_add_object_symbols (abfd, info);
2893 return _bfd_generic_link_add_archive_symbols
2894 (abfd, info, aout_link_check_archive_element);
2896 bfd_set_error (bfd_error_wrong_format);
2901 /* Add symbols from an a.out object file. */
2904 aout_link_add_object_symbols (abfd, info)
2906 struct bfd_link_info *info;
2908 if (! aout_get_external_symbols (abfd))
2910 if (! aout_link_add_symbols (abfd, info))
2912 if (! info->keep_memory)
2914 if (! aout_link_free_symbols (abfd))
2920 /* Check a single archive element to see if we need to include it in
2921 the link. *PNEEDED is set according to whether this element is
2922 needed in the link or not. This is called from
2923 _bfd_generic_link_add_archive_symbols. */
2926 aout_link_check_archive_element (abfd, info, pneeded)
2928 struct bfd_link_info *info;
2931 if (! aout_get_external_symbols (abfd))
2934 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
2939 if (! aout_link_add_symbols (abfd, info))
2943 if (! info->keep_memory || ! *pneeded)
2945 if (! aout_link_free_symbols (abfd))
2952 /* Free up the internal symbols read from an a.out file. */
2955 aout_link_free_symbols (abfd)
2958 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
2960 free ((PTR) obj_aout_external_syms (abfd));
2961 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
2963 if (obj_aout_external_strings (abfd) != (char *) NULL)
2965 free ((PTR) obj_aout_external_strings (abfd));
2966 obj_aout_external_strings (abfd) = (char *) NULL;
2971 /* Look through the internal symbols to see if this object file should
2972 be included in the link. We should include this object file if it
2973 defines any symbols which are currently undefined. If this object
2974 file defines a common symbol, then we may adjust the size of the
2975 known symbol but we do not include the object file in the link
2976 (unless there is some other reason to include it). */
2979 aout_link_check_ar_symbols (abfd, info, pneeded)
2981 struct bfd_link_info *info;
2984 register struct external_nlist *p;
2985 struct external_nlist *pend;
2990 /* Look through all the symbols. */
2991 p = obj_aout_external_syms (abfd);
2992 pend = p + obj_aout_external_sym_count (abfd);
2993 strings = obj_aout_external_strings (abfd);
2994 for (; p < pend; p++)
2996 int type = bfd_h_get_8 (abfd, p->e_type);
2998 struct bfd_link_hash_entry *h;
3000 /* Ignore symbols that are not externally visible. This is an
3001 optimization only, as we check the type more thoroughly
3003 if (((type & N_EXT) == 0
3004 || (type & N_STAB) != 0
3011 if (type == N_WARNING
3017 name = strings + GET_WORD (abfd, p->e_strx);
3018 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3020 /* We are only interested in symbols that are currently
3021 undefined or common. */
3022 if (h == (struct bfd_link_hash_entry *) NULL
3023 || (h->type != bfd_link_hash_undefined
3024 && h->type != bfd_link_hash_common))
3026 if (type == (N_INDR | N_EXT))
3031 if (type == (N_TEXT | N_EXT)
3032 || type == (N_DATA | N_EXT)
3033 || type == (N_BSS | N_EXT)
3034 || type == (N_ABS | N_EXT)
3035 || type == (N_INDR | N_EXT))
3037 /* This object file defines this symbol. We must link it
3038 in. This is true regardless of whether the current
3039 definition of the symbol is undefined or common. If the
3040 current definition is common, we have a case in which we
3041 have already seen an object file including
3043 and this object file from the archive includes
3045 In such a case we must include this object file.
3047 FIXME: The SunOS 4.1.3 linker will pull in the archive
3048 element if the symbol is defined in the .data section,
3049 but not if it is defined in the .text section. That
3050 seems a bit crazy to me, and I haven't implemented it.
3051 However, it might be correct. */
3052 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3058 if (type == (N_UNDF | N_EXT))
3062 value = GET_WORD (abfd, p->e_value);
3065 /* This symbol is common in the object from the archive
3067 if (h->type == bfd_link_hash_undefined)
3072 symbfd = h->u.undef.abfd;
3073 if (symbfd == (bfd *) NULL)
3075 /* This symbol was created as undefined from
3076 outside BFD. We assume that we should link
3077 in the object file. This is done for the -u
3078 option in the linker. */
3079 if (! (*info->callbacks->add_archive_element) (info,
3086 /* Turn the current link symbol into a common
3087 symbol. It is already on the undefs list. */
3088 h->type = bfd_link_hash_common;
3089 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3090 bfd_hash_allocate (&info->hash->table,
3091 sizeof (struct bfd_link_hash_common_entry)));
3092 if (h->u.c.p == NULL)
3095 h->u.c.size = value;
3097 /* FIXME: This isn't quite right. The maximum
3098 alignment of a common symbol should be set by the
3099 architecture of the output file, not of the input
3101 power = bfd_log2 (value);
3102 if (power > bfd_get_arch_info (abfd)->section_align_power)
3103 power = bfd_get_arch_info (abfd)->section_align_power;
3104 h->u.c.p->alignment_power = power;
3106 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3111 /* Adjust the size of the common symbol if
3113 if (value > h->u.c.size)
3114 h->u.c.size = value;
3124 /* This symbol is weak but defined. We must pull it in if
3125 the current link symbol is undefined, but we don't want
3126 it if the current link symbol is common. */
3127 if (h->type == bfd_link_hash_undefined)
3129 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3137 /* We do not need this object file. */
3141 /* Add all symbols from an object file to the hash table. */
3144 aout_link_add_symbols (abfd, info)
3146 struct bfd_link_info *info;
3148 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3149 const char *, flagword, asection *,
3150 bfd_vma, const char *, boolean,
3152 struct bfd_link_hash_entry **));
3153 struct external_nlist *syms;
3154 bfd_size_type sym_count;
3157 struct aout_link_hash_entry **sym_hash;
3158 register struct external_nlist *p;
3159 struct external_nlist *pend;
3161 syms = obj_aout_external_syms (abfd);
3162 sym_count = obj_aout_external_sym_count (abfd);
3163 strings = obj_aout_external_strings (abfd);
3164 if (info->keep_memory)
3169 if ((abfd->flags & DYNAMIC) != 0
3170 && aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3172 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3173 (abfd, info, &syms, &sym_count, &strings)))
3177 /* We keep a list of the linker hash table entries that correspond
3178 to particular symbols. We could just look them up in the hash
3179 table, but keeping the list is more efficient. Perhaps this
3180 should be conditional on info->keep_memory. */
3181 sym_hash = ((struct aout_link_hash_entry **)
3184 * sizeof (struct aout_link_hash_entry *))));
3185 if (sym_hash == NULL && sym_count != 0)
3187 bfd_set_error (bfd_error_no_memory);
3190 obj_aout_sym_hashes (abfd) = sym_hash;
3192 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3193 if (add_one_symbol == NULL)
3194 add_one_symbol = _bfd_generic_link_add_one_symbol;
3197 pend = p + sym_count;
3198 for (; p < pend; p++, sym_hash++)
3209 type = bfd_h_get_8 (abfd, p->e_type);
3211 /* Ignore debugging symbols. */
3212 if ((type & N_STAB) != 0)
3215 name = strings + GET_WORD (abfd, p->e_strx);
3216 value = GET_WORD (abfd, p->e_value);
3233 /* Ignore symbols that are not externally visible. */
3236 /* Ignore local indirect symbol. */
3241 case N_UNDF | N_EXT:
3244 section = bfd_und_section_ptr;
3248 section = bfd_com_section_ptr;
3251 section = bfd_abs_section_ptr;
3253 case N_TEXT | N_EXT:
3254 section = obj_textsec (abfd);
3255 value -= bfd_get_section_vma (abfd, section);
3257 case N_DATA | N_EXT:
3258 case N_SETV | N_EXT:
3259 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3260 translate_from_native_sym_flags. */
3261 section = obj_datasec (abfd);
3262 value -= bfd_get_section_vma (abfd, section);
3265 section = obj_bsssec (abfd);
3266 value -= bfd_get_section_vma (abfd, section);
3268 case N_INDR | N_EXT:
3269 /* An indirect symbol. The next symbol is the symbol
3270 which this one really is. */
3271 BFD_ASSERT (p + 1 < pend);
3273 string = strings + GET_WORD (abfd, p->e_strx);
3274 section = bfd_ind_section_ptr;
3275 flags |= BSF_INDIRECT;
3277 case N_COMM | N_EXT:
3278 section = bfd_com_section_ptr;
3280 case N_SETA: case N_SETA | N_EXT:
3281 section = bfd_abs_section_ptr;
3282 flags |= BSF_CONSTRUCTOR;
3284 case N_SETT: case N_SETT | N_EXT:
3285 section = obj_textsec (abfd);
3286 flags |= BSF_CONSTRUCTOR;
3287 value -= bfd_get_section_vma (abfd, section);
3289 case N_SETD: case N_SETD | N_EXT:
3290 section = obj_datasec (abfd);
3291 flags |= BSF_CONSTRUCTOR;
3292 value -= bfd_get_section_vma (abfd, section);
3294 case N_SETB: case N_SETB | N_EXT:
3295 section = obj_bsssec (abfd);
3296 flags |= BSF_CONSTRUCTOR;
3297 value -= bfd_get_section_vma (abfd, section);
3300 /* A warning symbol. The next symbol is the one to warn
3302 BFD_ASSERT (p + 1 < pend);
3305 name = strings + GET_WORD (abfd, p->e_strx);
3306 section = bfd_und_section_ptr;
3307 flags |= BSF_WARNING;
3310 section = bfd_und_section_ptr;
3314 section = bfd_abs_section_ptr;
3318 section = obj_textsec (abfd);
3319 value -= bfd_get_section_vma (abfd, section);
3323 section = obj_datasec (abfd);
3324 value -= bfd_get_section_vma (abfd, section);
3328 section = obj_bsssec (abfd);
3329 value -= bfd_get_section_vma (abfd, section);
3334 if (! ((*add_one_symbol)
3335 (info, abfd, name, flags, section, value, string, copy, false,
3336 (struct bfd_link_hash_entry **) sym_hash)))
3339 /* Restrict the maximum alignment of a common symbol based on
3340 the architecture, since a.out has no way to represent
3341 alignment requirements of a section in a .o file. FIXME:
3342 This isn't quite right: it should use the architecture of the
3343 output file, not the input files. */
3344 if ((*sym_hash)->root.type == bfd_link_hash_common
3345 && ((*sym_hash)->root.u.c.p->alignment_power >
3346 bfd_get_arch_info (abfd)->section_align_power))
3347 (*sym_hash)->root.u.c.p->alignment_power =
3348 bfd_get_arch_info (abfd)->section_align_power;
3350 /* If this is a set symbol, and we are not building sets, then
3351 it is possible for the hash entry to not have been set. In
3352 such a case, treat the symbol as not globally defined. */
3353 if ((*sym_hash)->root.type == bfd_link_hash_new)
3355 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3359 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3366 /* During the final link step we need to pass around a bunch of
3367 information, so we do it in an instance of this structure. */
3369 struct aout_final_link_info
3371 /* General link information. */
3372 struct bfd_link_info *info;
3375 /* Reloc file positions. */
3376 file_ptr treloff, dreloff;
3377 /* File position of symbols. */
3380 struct bfd_strtab_hash *strtab;
3381 /* A buffer large enough to hold the contents of any section. */
3383 /* A buffer large enough to hold the relocs of any section. */
3385 /* A buffer large enough to hold the symbol map of any input BFD. */
3387 /* A buffer large enough to hold output symbols of any input BFD. */
3388 struct external_nlist *output_syms;
3391 static boolean aout_link_input_bfd
3392 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3393 static boolean aout_link_write_symbols
3394 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3395 static boolean aout_link_write_other_symbol
3396 PARAMS ((struct aout_link_hash_entry *, PTR));
3397 static boolean aout_link_input_section
3398 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3399 asection *input_section, file_ptr *reloff_ptr,
3400 bfd_size_type rel_size));
3401 static boolean aout_link_input_section_std
3402 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3403 asection *input_section, struct reloc_std_external *,
3404 bfd_size_type rel_size, bfd_byte *contents));
3405 static boolean aout_link_input_section_ext
3406 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3407 asection *input_section, struct reloc_ext_external *,
3408 bfd_size_type rel_size, bfd_byte *contents));
3409 static INLINE asection *aout_reloc_index_to_section
3410 PARAMS ((bfd *, int));
3411 static boolean aout_link_reloc_link_order
3412 PARAMS ((struct aout_final_link_info *, asection *,
3413 struct bfd_link_order *));
3415 /* Do the final link step. This is called on the output BFD. The
3416 INFO structure should point to a list of BFDs linked through the
3417 link_next field which can be used to find each BFD which takes part
3418 in the output. Also, each section in ABFD should point to a list
3419 of bfd_link_order structures which list all the input sections for
3420 the output section. */
3423 NAME(aout,final_link) (abfd, info, callback)
3425 struct bfd_link_info *info;
3426 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3428 struct aout_final_link_info aout_info;
3430 bfd_size_type trsize, drsize;
3431 size_t max_contents_size;
3432 size_t max_relocs_size;
3433 size_t max_sym_count;
3434 bfd_size_type text_size;
3436 register struct bfd_link_order *p;
3438 boolean have_link_order_relocs;
3441 abfd->flags |= DYNAMIC;
3443 aout_info.info = info;
3444 aout_info.output_bfd = abfd;
3445 aout_info.contents = NULL;
3446 aout_info.relocs = NULL;
3448 /* Figure out the largest section size. Also, if generating
3449 relocateable output, count the relocs. */
3452 max_contents_size = 0;
3453 max_relocs_size = 0;
3455 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3459 if (info->relocateable)
3461 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3463 trsize += exec_hdr (sub)->a_trsize;
3464 drsize += exec_hdr (sub)->a_drsize;
3468 /* FIXME: We need to identify the .text and .data sections
3469 and call get_reloc_upper_bound and canonicalize_reloc to
3470 work out the number of relocs needed, and then multiply
3471 by the reloc size. */
3476 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3478 sz = bfd_section_size (sub, obj_textsec (sub));
3479 if (sz > max_contents_size)
3480 max_contents_size = sz;
3481 sz = bfd_section_size (sub, obj_datasec (sub));
3482 if (sz > max_contents_size)
3483 max_contents_size = sz;
3485 sz = exec_hdr (sub)->a_trsize;
3486 if (sz > max_relocs_size)
3487 max_relocs_size = sz;
3488 sz = exec_hdr (sub)->a_drsize;
3489 if (sz > max_relocs_size)
3490 max_relocs_size = sz;
3492 sz = obj_aout_external_sym_count (sub);
3493 if (sz > max_sym_count)
3498 if (info->relocateable)
3500 if (obj_textsec (abfd) != (asection *) NULL)
3501 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3503 * obj_reloc_entry_size (abfd));
3504 if (obj_datasec (abfd) != (asection *) NULL)
3505 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3507 * obj_reloc_entry_size (abfd));
3510 exec_hdr (abfd)->a_trsize = trsize;
3511 exec_hdr (abfd)->a_drsize = drsize;
3513 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3515 /* Adjust the section sizes and vmas according to the magic number.
3516 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3517 filepos for each section. */
3518 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3521 /* The relocation and symbol file positions differ among a.out
3522 targets. We are passed a callback routine from the backend
3523 specific code to handle this.
3524 FIXME: At this point we do not know how much space the symbol
3525 table will require. This will not work for any (nonstandard)
3526 a.out target that needs to know the symbol table size before it
3527 can compute the relocation file positions. This may or may not
3528 be the case for the hp300hpux target, for example. */
3529 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3531 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3532 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3533 obj_sym_filepos (abfd) = aout_info.symoff;
3535 /* We keep a count of the symbols as we output them. */
3536 obj_aout_external_sym_count (abfd) = 0;
3538 /* We accumulate the string table as we write out the symbols. */
3539 aout_info.strtab = _bfd_stringtab_init ();
3540 if (aout_info.strtab == NULL)
3543 /* Allocate buffers to hold section contents and relocs. */
3544 aout_info.contents = (bfd_byte *) malloc (max_contents_size);
3545 aout_info.relocs = (PTR) malloc (max_relocs_size);
3546 aout_info.symbol_map = (int *) malloc (max_sym_count * sizeof (int *));
3547 aout_info.output_syms = ((struct external_nlist *)
3548 malloc ((max_sym_count + 1)
3549 * sizeof (struct external_nlist)));
3550 if ((aout_info.contents == NULL && max_contents_size != 0)
3551 || (aout_info.relocs == NULL && max_relocs_size != 0)
3552 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3553 || aout_info.output_syms == NULL)
3555 bfd_set_error (bfd_error_no_memory);
3559 /* If we have a symbol named __DYNAMIC, force it out now. This is
3560 required by SunOS. Doing this here rather than in sunos.c is a
3561 hack, but it's easier than exporting everything which would be
3564 struct aout_link_hash_entry *h;
3566 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3567 false, false, false);
3569 aout_link_write_other_symbol (h, &aout_info);
3572 /* The most time efficient way to do the link would be to read all
3573 the input object files into memory and then sort out the
3574 information into the output file. Unfortunately, that will
3575 probably use too much memory. Another method would be to step
3576 through everything that composes the text section and write it
3577 out, and then everything that composes the data section and write
3578 it out, and then write out the relocs, and then write out the
3579 symbols. Unfortunately, that requires reading stuff from each
3580 input file several times, and we will not be able to keep all the
3581 input files open simultaneously, and reopening them will be slow.
3583 What we do is basically process one input file at a time. We do
3584 everything we need to do with an input file once--copy over the
3585 section contents, handle the relocation information, and write
3586 out the symbols--and then we throw away the information we read
3587 from it. This approach requires a lot of lseeks of the output
3588 file, which is unfortunate but still faster than reopening a lot
3591 We use the output_has_begun field of the input BFDs to see
3592 whether we have already handled it. */
3593 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3594 sub->output_has_begun = false;
3596 have_link_order_relocs = false;
3597 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3599 for (p = o->link_order_head;
3600 p != (struct bfd_link_order *) NULL;
3603 if (p->type == bfd_indirect_link_order
3604 && (bfd_get_flavour (p->u.indirect.section->owner)
3605 == bfd_target_aout_flavour))
3609 input_bfd = p->u.indirect.section->owner;
3610 if (! input_bfd->output_has_begun)
3612 if (! aout_link_input_bfd (&aout_info, input_bfd))
3614 input_bfd->output_has_begun = true;
3617 else if (p->type == bfd_section_reloc_link_order
3618 || p->type == bfd_symbol_reloc_link_order)
3620 /* These are handled below. */
3621 have_link_order_relocs = true;
3625 if (! _bfd_default_link_order (abfd, info, o, p))
3631 /* Write out any symbols that we have not already written out. */
3632 aout_link_hash_traverse (aout_hash_table (info),
3633 aout_link_write_other_symbol,
3636 /* Now handle any relocs we were asked to create by the linker.
3637 These did not come from any input file. We must do these after
3638 we have written out all the symbols, so that we know the symbol
3640 if (have_link_order_relocs)
3642 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3644 for (p = o->link_order_head;
3645 p != (struct bfd_link_order *) NULL;
3648 if (p->type == bfd_section_reloc_link_order
3649 || p->type == bfd_symbol_reloc_link_order)
3651 if (! aout_link_reloc_link_order (&aout_info, o, p))
3658 if (aout_info.contents != NULL)
3660 free (aout_info.contents);
3661 aout_info.contents = NULL;
3663 if (aout_info.relocs != NULL)
3665 free (aout_info.relocs);
3666 aout_info.relocs = NULL;
3668 if (aout_info.symbol_map != NULL)
3670 free (aout_info.symbol_map);
3671 aout_info.symbol_map = NULL;
3673 if (aout_info.output_syms != NULL)
3675 free (aout_info.output_syms);
3676 aout_info.output_syms = NULL;
3679 /* Finish up any dynamic linking we may be doing. */
3680 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3682 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3686 /* Update the header information. */
3687 abfd->symcount = obj_aout_external_sym_count (abfd);
3688 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3689 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3690 obj_textsec (abfd)->reloc_count =
3691 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3692 obj_datasec (abfd)->reloc_count =
3693 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3695 /* Write out the string table. */
3696 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
3698 return emit_stringtab (abfd, aout_info.strtab);
3701 if (aout_info.contents != NULL)
3702 free (aout_info.contents);
3703 if (aout_info.relocs != NULL)
3704 free (aout_info.relocs);
3705 if (aout_info.symbol_map != NULL)
3706 free (aout_info.symbol_map);
3707 if (aout_info.output_syms != NULL)
3708 free (aout_info.output_syms);
3712 /* Link an a.out input BFD into the output file. */
3715 aout_link_input_bfd (finfo, input_bfd)
3716 struct aout_final_link_info *finfo;
3719 bfd_size_type sym_count;
3721 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3723 /* If this is a dynamic object, it may need special handling. */
3724 if ((input_bfd->flags & DYNAMIC) != 0
3725 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3727 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3728 (finfo->info, input_bfd));
3731 /* Get the symbols. We probably have them already, unless
3732 finfo->info->keep_memory is false. */
3733 if (! aout_get_external_symbols (input_bfd))
3736 sym_count = obj_aout_external_sym_count (input_bfd);
3738 /* Write out the symbols and get a map of the new indices. The map
3739 is placed into finfo->symbol_map. */
3740 if (! aout_link_write_symbols (finfo, input_bfd))
3743 /* Relocate and write out the sections. These functions use the
3744 symbol map created by aout_link_write_symbols. */
3745 if (! aout_link_input_section (finfo, input_bfd,
3746 obj_textsec (input_bfd),
3748 exec_hdr (input_bfd)->a_trsize)
3749 || ! aout_link_input_section (finfo, input_bfd,
3750 obj_datasec (input_bfd),
3752 exec_hdr (input_bfd)->a_drsize))
3755 /* If we are not keeping memory, we don't need the symbols any
3756 longer. We still need them if we are keeping memory, because the
3757 strings in the hash table point into them. */
3758 if (! finfo->info->keep_memory)
3760 if (! aout_link_free_symbols (input_bfd))
3767 /* Adjust and write out the symbols for an a.out file. Set the new
3768 symbol indices into a symbol_map. */
3771 aout_link_write_symbols (finfo, input_bfd)
3772 struct aout_final_link_info *finfo;
3776 bfd_size_type sym_count;
3778 enum bfd_link_strip strip;
3779 enum bfd_link_discard discard;
3780 struct external_nlist *outsym;
3781 bfd_size_type strtab_index;
3782 register struct external_nlist *sym;
3783 struct external_nlist *sym_end;
3784 struct aout_link_hash_entry **sym_hash;
3789 output_bfd = finfo->output_bfd;
3790 sym_count = obj_aout_external_sym_count (input_bfd);
3791 strings = obj_aout_external_strings (input_bfd);
3792 strip = finfo->info->strip;
3793 discard = finfo->info->discard;
3794 outsym = finfo->output_syms;
3796 /* First write out a symbol for this object file, unless we are
3797 discarding such symbols. */
3798 if (strip != strip_all
3799 && (strip != strip_some
3800 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
3801 false, false) != NULL)
3802 && discard != discard_all)
3804 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
3805 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
3806 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
3807 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
3808 input_bfd->filename, false);
3809 if (strtab_index == (bfd_size_type) -1)
3811 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
3812 PUT_WORD (output_bfd,
3813 (bfd_get_section_vma (output_bfd,
3814 obj_textsec (input_bfd)->output_section)
3815 + obj_textsec (input_bfd)->output_offset),
3817 ++obj_aout_external_sym_count (output_bfd);
3823 sym = obj_aout_external_syms (input_bfd);
3824 sym_end = sym + sym_count;
3825 sym_hash = obj_aout_sym_hashes (input_bfd);
3826 symbol_map = finfo->symbol_map;
3827 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
3831 struct aout_link_hash_entry *h;
3839 type = bfd_h_get_8 (input_bfd, sym->e_type);
3840 name = strings + GET_WORD (input_bfd, sym->e_strx);
3846 /* Pass this symbol through. It is the target of an
3847 indirect or warning symbol. */
3848 val = GET_WORD (input_bfd, sym->e_value);
3853 /* Skip this symbol, which is the target of an indirect
3854 symbol that we have changed to no longer be an indirect
3861 struct aout_link_hash_entry *hresolve;
3863 /* We have saved the hash table entry for this symbol, if
3864 there is one. Note that we could just look it up again
3865 in the hash table, provided we first check that it is an
3869 /* If this is an indirect or warning symbol, then change
3870 hresolve to the base symbol. We also change *sym_hash so
3871 that the relocation routines relocate against the real
3874 if (h != (struct aout_link_hash_entry *) NULL
3875 && (h->root.type == bfd_link_hash_indirect
3876 || h->root.type == bfd_link_hash_warning))
3878 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
3879 while (hresolve->root.type == bfd_link_hash_indirect
3880 || hresolve->root.type == bfd_link_hash_warning)
3881 hresolve = ((struct aout_link_hash_entry *)
3882 hresolve->root.u.i.link);
3883 *sym_hash = hresolve;
3886 /* If the symbol has already been written out, skip it. */
3887 if (h != (struct aout_link_hash_entry *) NULL
3888 && h->root.type != bfd_link_hash_warning
3891 if ((type & N_TYPE) == N_INDR
3892 || type == N_WARNING)
3894 *symbol_map = h->indx;
3898 /* See if we are stripping this symbol. */
3904 case strip_debugger:
3905 if ((type & N_STAB) != 0)
3909 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
3919 if (h != (struct aout_link_hash_entry *) NULL)
3924 /* Get the value of the symbol. */
3925 if ((type & N_TYPE) == N_TEXT
3927 symsec = obj_textsec (input_bfd);
3928 else if ((type & N_TYPE) == N_DATA
3930 symsec = obj_datasec (input_bfd);
3931 else if ((type & N_TYPE) == N_BSS
3933 symsec = obj_bsssec (input_bfd);
3934 else if ((type & N_TYPE) == N_ABS
3936 symsec = bfd_abs_section_ptr;
3937 else if (((type & N_TYPE) == N_INDR
3938 && (hresolve == (struct aout_link_hash_entry *) NULL
3939 || (hresolve->root.type != bfd_link_hash_defined
3940 && hresolve->root.type != bfd_link_hash_defweak
3941 && hresolve->root.type != bfd_link_hash_common)))
3942 || type == N_WARNING)
3944 /* Pass the next symbol through unchanged. The
3945 condition above for indirect symbols is so that if
3946 the indirect symbol was defined, we output it with
3947 the correct definition so the debugger will
3950 val = GET_WORD (input_bfd, sym->e_value);
3953 else if ((type & N_STAB) != 0)
3955 val = GET_WORD (input_bfd, sym->e_value);
3960 /* If we get here with an indirect symbol, it means that
3961 we are outputting it with a real definition. In such
3962 a case we do not want to output the next symbol,
3963 which is the target of the indirection. */
3964 if ((type & N_TYPE) == N_INDR)
3969 /* We need to get the value from the hash table. We use
3970 hresolve so that if we have defined an indirect
3971 symbol we output the final definition. */
3972 if (h == (struct aout_link_hash_entry *) NULL)
3974 switch (type & N_TYPE)
3977 symsec = obj_textsec (input_bfd);
3980 symsec = obj_datasec (input_bfd);
3983 symsec = obj_bsssec (input_bfd);
3986 symsec = bfd_abs_section_ptr;
3993 else if (hresolve->root.type == bfd_link_hash_defined
3994 || hresolve->root.type == bfd_link_hash_defweak)
3996 asection *input_section;
3997 asection *output_section;
3999 /* This case usually means a common symbol which was
4000 turned into a defined symbol. */
4001 input_section = hresolve->root.u.def.section;
4002 output_section = input_section->output_section;
4003 BFD_ASSERT (bfd_is_abs_section (output_section)
4004 || output_section->owner == output_bfd);
4005 val = (hresolve->root.u.def.value
4006 + bfd_get_section_vma (output_bfd, output_section)
4007 + input_section->output_offset);
4009 /* Get the correct type based on the section. If
4010 this is a constructed set, force it to be
4011 globally visible. */
4020 if (output_section == obj_textsec (output_bfd))
4021 type |= (hresolve->root.type == bfd_link_hash_defined
4024 else if (output_section == obj_datasec (output_bfd))
4025 type |= (hresolve->root.type == bfd_link_hash_defined
4028 else if (output_section == obj_bsssec (output_bfd))
4029 type |= (hresolve->root.type == bfd_link_hash_defined
4033 type |= (hresolve->root.type == bfd_link_hash_defined
4037 else if (hresolve->root.type == bfd_link_hash_common)
4038 val = hresolve->root.u.c.size;
4039 else if (hresolve->root.type == bfd_link_hash_undefweak)
4047 if (symsec != (asection *) NULL)
4048 val = (symsec->output_section->vma
4049 + symsec->output_offset
4050 + (GET_WORD (input_bfd, sym->e_value)
4053 /* If this is a global symbol set the written flag, and if
4054 it is a local symbol see if we should discard it. */
4055 if (h != (struct aout_link_hash_entry *) NULL)
4058 h->indx = obj_aout_external_sym_count (output_bfd);
4060 else if ((type & N_TYPE) != N_SETT
4061 && (type & N_TYPE) != N_SETD
4062 && (type & N_TYPE) != N_SETB
4063 && (type & N_TYPE) != N_SETA)
4070 if (*name == *finfo->info->lprefix
4071 && (finfo->info->lprefix_len == 1
4072 || strncmp (name, finfo->info->lprefix,
4073 finfo->info->lprefix_len) == 0))
4088 /* Copy this symbol into the list of symbols we are going to
4090 bfd_h_put_8 (output_bfd, type, outsym->e_type);
4091 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
4093 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
4096 if (! finfo->info->keep_memory)
4098 /* name points into a string table which we are going to
4099 free. If there is a hash table entry, use that string.
4100 Otherwise, copy name into memory. */
4101 if (h != (struct aout_link_hash_entry *) NULL)
4102 name = h->root.root.string;
4106 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4108 if (strtab_index == (bfd_size_type) -1)
4110 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4111 PUT_WORD (output_bfd, val, outsym->e_value);
4112 *symbol_map = obj_aout_external_sym_count (output_bfd);
4113 ++obj_aout_external_sym_count (output_bfd);
4117 /* Write out the output symbols we have just constructed. */
4118 if (outsym > finfo->output_syms)
4120 bfd_size_type outsym_count;
4122 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4124 outsym_count = outsym - finfo->output_syms;
4125 if (bfd_write ((PTR) finfo->output_syms,
4126 (bfd_size_type) EXTERNAL_NLIST_SIZE,
4127 (bfd_size_type) outsym_count, output_bfd)
4128 != outsym_count * EXTERNAL_NLIST_SIZE)
4130 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
4136 /* Write out a symbol that was not associated with an a.out input
4140 aout_link_write_other_symbol (h, data)
4141 struct aout_link_hash_entry *h;
4144 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4148 struct external_nlist outsym;
4151 output_bfd = finfo->output_bfd;
4153 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4155 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4156 (output_bfd, finfo->info, h)))
4158 /* FIXME: No way to handle errors. */
4168 /* An indx of -2 means the symbol must be written. */
4170 && (finfo->info->strip == strip_all
4171 || (finfo->info->strip == strip_some
4172 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4173 false, false) == NULL)))
4176 switch (h->root.type)
4180 /* Avoid variable not initialized warnings. */
4182 case bfd_link_hash_new:
4183 /* This can happen for set symbols when sets are not being
4186 case bfd_link_hash_undefined:
4187 type = N_UNDF | N_EXT;
4190 case bfd_link_hash_defined:
4191 case bfd_link_hash_defweak:
4195 sec = h->root.u.def.section->output_section;
4196 BFD_ASSERT (bfd_is_abs_section (sec)
4197 || sec->owner == output_bfd);
4198 if (sec == obj_textsec (output_bfd))
4199 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4200 else if (sec == obj_datasec (output_bfd))
4201 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4202 else if (sec == obj_bsssec (output_bfd))
4203 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4205 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4207 val = (h->root.u.def.value
4209 + h->root.u.def.section->output_offset);
4212 case bfd_link_hash_common:
4213 type = N_UNDF | N_EXT;
4214 val = h->root.u.c.size;
4216 case bfd_link_hash_undefweak:
4219 case bfd_link_hash_indirect:
4220 case bfd_link_hash_warning:
4221 /* FIXME: Ignore these for now. The circumstances under which
4222 they should be written out are not clear to me. */
4226 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4227 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4228 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4229 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4231 if (indx == (bfd_size_type) -1)
4233 /* FIXME: No way to handle errors. */
4236 PUT_WORD (output_bfd, indx, outsym.e_strx);
4237 PUT_WORD (output_bfd, val, outsym.e_value);
4239 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4240 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4241 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4243 /* FIXME: No way to handle errors. */
4247 finfo->symoff += EXTERNAL_NLIST_SIZE;
4248 h->indx = obj_aout_external_sym_count (output_bfd);
4249 ++obj_aout_external_sym_count (output_bfd);
4254 /* Link an a.out section into the output file. */
4257 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4259 struct aout_final_link_info *finfo;
4261 asection *input_section;
4262 file_ptr *reloff_ptr;
4263 bfd_size_type rel_size;
4265 bfd_size_type input_size;
4268 /* Get the section contents. */
4269 input_size = bfd_section_size (input_bfd, input_section);
4270 if (! bfd_get_section_contents (input_bfd, input_section,
4271 (PTR) finfo->contents,
4272 (file_ptr) 0, input_size))
4275 /* Read in the relocs if we haven't already done it. */
4276 if (aout_section_data (input_section) != NULL
4277 && aout_section_data (input_section)->relocs != NULL)
4278 relocs = aout_section_data (input_section)->relocs;
4281 relocs = finfo->relocs;
4284 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4285 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4290 /* Relocate the section contents. */
4291 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4293 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4294 (struct reloc_std_external *) relocs,
4295 rel_size, finfo->contents))
4300 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4301 (struct reloc_ext_external *) relocs,
4302 rel_size, finfo->contents))
4306 /* Write out the section contents. */
4307 if (! bfd_set_section_contents (finfo->output_bfd,
4308 input_section->output_section,
4309 (PTR) finfo->contents,
4310 input_section->output_offset,
4314 /* If we are producing relocateable output, the relocs were
4315 modified, and we now write them out. */
4316 if (finfo->info->relocateable && rel_size > 0)
4318 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4320 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4323 *reloff_ptr += rel_size;
4325 /* Assert that the relocs have not run into the symbols, and
4326 that if these are the text relocs they have not run into the
4328 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4329 && (reloff_ptr != &finfo->treloff
4331 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4337 /* Get the section corresponding to a reloc index. */
4339 static INLINE asection *
4340 aout_reloc_index_to_section (abfd, indx)
4344 switch (indx & N_TYPE)
4347 return obj_textsec (abfd);
4349 return obj_datasec (abfd);
4351 return obj_bsssec (abfd);
4354 return bfd_abs_section_ptr;
4360 /* Relocate an a.out section using standard a.out relocs. */
4363 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4365 struct aout_final_link_info *finfo;
4367 asection *input_section;
4368 struct reloc_std_external *relocs;
4369 bfd_size_type rel_size;
4372 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4374 struct aout_link_hash_entry *,
4375 PTR, bfd_byte *, boolean *,
4378 boolean relocateable;
4379 struct external_nlist *syms;
4381 struct aout_link_hash_entry **sym_hashes;
4383 bfd_size_type reloc_count;
4384 register struct reloc_std_external *rel;
4385 struct reloc_std_external *rel_end;
4387 output_bfd = finfo->output_bfd;
4388 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4390 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4391 BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p
4392 == output_bfd->xvec->header_byteorder_big_p);
4394 relocateable = finfo->info->relocateable;
4395 syms = obj_aout_external_syms (input_bfd);
4396 strings = obj_aout_external_strings (input_bfd);
4397 sym_hashes = obj_aout_sym_hashes (input_bfd);
4398 symbol_map = finfo->symbol_map;
4400 reloc_count = rel_size / RELOC_STD_SIZE;
4402 rel_end = rel + reloc_count;
4403 for (; rel < rel_end; rel++)
4410 reloc_howto_type *howto;
4411 struct aout_link_hash_entry *h = NULL;
4413 bfd_reloc_status_type r;
4415 r_addr = GET_SWORD (input_bfd, rel->r_address);
4417 #ifdef MY_reloc_howto
4418 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel);
4424 unsigned int howto_idx;
4426 if (input_bfd->xvec->header_byteorder_big_p)
4428 r_index = ((rel->r_index[0] << 16)
4429 | (rel->r_index[1] << 8)
4431 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4432 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4433 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4434 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4435 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4436 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4437 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4441 r_index = ((rel->r_index[2] << 16)
4442 | (rel->r_index[1] << 8)
4444 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4445 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4446 r_baserel = (0 != (rel->r_type[0]
4447 & RELOC_STD_BITS_BASEREL_LITTLE));
4448 r_jmptable= (0 != (rel->r_type[0]
4449 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4450 r_relative= (0 != (rel->r_type[0]
4451 & RELOC_STD_BITS_RELATIVE_LITTLE));
4452 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4453 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4456 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4457 + 16 * r_jmptable + 32 * r_relative);
4458 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4459 howto = howto_table_std + howto_idx;
4465 /* We are generating a relocateable output file, and must
4466 modify the reloc accordingly. */
4469 /* If we know the symbol this relocation is against,
4470 convert it into a relocation against a section. This
4471 is what the native linker does. */
4472 h = sym_hashes[r_index];
4473 if (h != (struct aout_link_hash_entry *) NULL
4474 && (h->root.type == bfd_link_hash_defined
4475 || h->root.type == bfd_link_hash_defweak))
4477 asection *output_section;
4479 /* Change the r_extern value. */
4480 if (output_bfd->xvec->header_byteorder_big_p)
4481 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4483 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4485 /* Compute a new r_index. */
4486 output_section = h->root.u.def.section->output_section;
4487 if (output_section == obj_textsec (output_bfd))
4489 else if (output_section == obj_datasec (output_bfd))
4491 else if (output_section == obj_bsssec (output_bfd))
4496 /* Add the symbol value and the section VMA to the
4497 addend stored in the contents. */
4498 relocation = (h->root.u.def.value
4499 + output_section->vma
4500 + h->root.u.def.section->output_offset);
4504 /* We must change r_index according to the symbol
4506 r_index = symbol_map[r_index];
4512 /* We decided to strip this symbol, but it
4513 turns out that we can't. Note that we
4514 lose the other and desc information here.
4515 I don't think that will ever matter for a
4521 if (! aout_link_write_other_symbol (h,
4531 name = strings + GET_WORD (input_bfd,
4532 syms[r_index].e_strx);
4533 if (! ((*finfo->info->callbacks->unattached_reloc)
4534 (finfo->info, name, input_bfd, input_section,
4544 /* Write out the new r_index value. */
4545 if (output_bfd->xvec->header_byteorder_big_p)
4547 rel->r_index[0] = r_index >> 16;
4548 rel->r_index[1] = r_index >> 8;
4549 rel->r_index[2] = r_index;
4553 rel->r_index[2] = r_index >> 16;
4554 rel->r_index[1] = r_index >> 8;
4555 rel->r_index[0] = r_index;
4562 /* This is a relocation against a section. We must
4563 adjust by the amount that the section moved. */
4564 section = aout_reloc_index_to_section (input_bfd, r_index);
4565 relocation = (section->output_section->vma
4566 + section->output_offset
4570 /* Change the address of the relocation. */
4571 PUT_WORD (output_bfd,
4572 r_addr + input_section->output_offset,
4575 /* Adjust a PC relative relocation by removing the reference
4576 to the original address in the section and including the
4577 reference to the new address. */
4579 relocation -= (input_section->output_section->vma
4580 + input_section->output_offset
4581 - input_section->vma);
4583 #ifdef MY_relocatable_reloc
4584 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4587 if (relocation == 0)
4590 r = MY_relocate_contents (howto,
4591 input_bfd, relocation,
4598 /* We are generating an executable, and must do a full
4603 h = sym_hashes[r_index];
4605 if (h != (struct aout_link_hash_entry *) NULL
4606 && (h->root.type == bfd_link_hash_defined
4607 || h->root.type == bfd_link_hash_defweak))
4609 relocation = (h->root.u.def.value
4610 + h->root.u.def.section->output_section->vma
4611 + h->root.u.def.section->output_offset);
4613 else if (h != (struct aout_link_hash_entry *) NULL
4614 && h->root.type == bfd_link_hash_undefweak)
4626 section = aout_reloc_index_to_section (input_bfd, r_index);
4627 relocation = (section->output_section->vma
4628 + section->output_offset
4631 relocation += input_section->vma;
4634 if (check_dynamic_reloc != NULL)
4638 if (! ((*check_dynamic_reloc)
4639 (finfo->info, input_bfd, input_section, h,
4640 (PTR) rel, contents, &skip, &relocation)))
4646 /* Now warn if a global symbol is undefined. We could not
4647 do this earlier, because check_dynamic_reloc might want
4648 to skip this reloc. */
4649 if (hundef && ! finfo->info->shared && ! r_baserel)
4653 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4654 if (! ((*finfo->info->callbacks->undefined_symbol)
4655 (finfo->info, name, input_bfd, input_section, r_addr)))
4659 r = MY_final_link_relocate (howto,
4660 input_bfd, input_section,
4661 contents, r_addr, relocation,
4665 if (r != bfd_reloc_ok)
4670 case bfd_reloc_outofrange:
4672 case bfd_reloc_overflow:
4677 name = strings + GET_WORD (input_bfd,
4678 syms[r_index].e_strx);
4683 s = aout_reloc_index_to_section (input_bfd, r_index);
4684 name = bfd_section_name (input_bfd, s);
4686 if (! ((*finfo->info->callbacks->reloc_overflow)
4687 (finfo->info, name, howto->name,
4688 (bfd_vma) 0, input_bfd, input_section, r_addr)))
4699 /* Relocate an a.out section using extended a.out relocs. */
4702 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
4704 struct aout_final_link_info *finfo;
4706 asection *input_section;
4707 struct reloc_ext_external *relocs;
4708 bfd_size_type rel_size;
4711 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4713 struct aout_link_hash_entry *,
4714 PTR, bfd_byte *, boolean *,
4717 boolean relocateable;
4718 struct external_nlist *syms;
4720 struct aout_link_hash_entry **sym_hashes;
4722 bfd_size_type reloc_count;
4723 register struct reloc_ext_external *rel;
4724 struct reloc_ext_external *rel_end;
4726 output_bfd = finfo->output_bfd;
4727 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4729 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4730 BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p
4731 == output_bfd->xvec->header_byteorder_big_p);
4733 relocateable = finfo->info->relocateable;
4734 syms = obj_aout_external_syms (input_bfd);
4735 strings = obj_aout_external_strings (input_bfd);
4736 sym_hashes = obj_aout_sym_hashes (input_bfd);
4737 symbol_map = finfo->symbol_map;
4739 reloc_count = rel_size / RELOC_EXT_SIZE;
4741 rel_end = rel + reloc_count;
4742 for (; rel < rel_end; rel++)
4747 unsigned int r_type;
4749 struct aout_link_hash_entry *h = NULL;
4750 asection *r_section = NULL;
4753 r_addr = GET_SWORD (input_bfd, rel->r_address);
4755 if (input_bfd->xvec->header_byteorder_big_p)
4757 r_index = ((rel->r_index[0] << 16)
4758 | (rel->r_index[1] << 8)
4760 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4761 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4762 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4766 r_index = ((rel->r_index[2] << 16)
4767 | (rel->r_index[1] << 8)
4769 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4770 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4771 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4774 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4776 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
4780 /* We are generating a relocateable output file, and must
4781 modify the reloc accordingly. */
4784 /* If we know the symbol this relocation is against,
4785 convert it into a relocation against a section. This
4786 is what the native linker does. */
4787 h = sym_hashes[r_index];
4788 if (h != (struct aout_link_hash_entry *) NULL
4789 && (h->root.type == bfd_link_hash_defined
4790 || h->root.type == bfd_link_hash_defweak))
4792 asection *output_section;
4794 /* Change the r_extern value. */
4795 if (output_bfd->xvec->header_byteorder_big_p)
4796 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
4798 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
4800 /* Compute a new r_index. */
4801 output_section = h->root.u.def.section->output_section;
4802 if (output_section == obj_textsec (output_bfd))
4804 else if (output_section == obj_datasec (output_bfd))
4806 else if (output_section == obj_bsssec (output_bfd))
4811 /* Add the symbol value and the section VMA to the
4813 relocation = (h->root.u.def.value
4814 + output_section->vma
4815 + h->root.u.def.section->output_offset);
4817 /* Now RELOCATION is the VMA of the final
4818 destination. If this is a PC relative reloc,
4819 then ADDEND is the negative of the source VMA.
4820 We want to set ADDEND to the difference between
4821 the destination VMA and the source VMA, which
4822 means we must adjust RELOCATION by the change in
4823 the source VMA. This is done below. */
4827 /* We must change r_index according to the symbol
4829 r_index = symbol_map[r_index];
4835 /* We decided to strip this symbol, but it
4836 turns out that we can't. Note that we
4837 lose the other and desc information here.
4838 I don't think that will ever matter for a
4844 if (! aout_link_write_other_symbol (h,
4854 name = strings + GET_WORD (input_bfd,
4855 syms[r_index].e_strx);
4856 if (! ((*finfo->info->callbacks->unattached_reloc)
4857 (finfo->info, name, input_bfd, input_section,
4866 /* If this is a PC relative reloc, then the addend
4867 is the negative of the source VMA. We must
4868 adjust it by the change in the source VMA. This
4872 /* Write out the new r_index value. */
4873 if (output_bfd->xvec->header_byteorder_big_p)
4875 rel->r_index[0] = r_index >> 16;
4876 rel->r_index[1] = r_index >> 8;
4877 rel->r_index[2] = r_index;
4881 rel->r_index[2] = r_index >> 16;
4882 rel->r_index[1] = r_index >> 8;
4883 rel->r_index[0] = r_index;
4888 /* This is a relocation against a section. We must
4889 adjust by the amount that the section moved. */
4890 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4891 relocation = (r_section->output_section->vma
4892 + r_section->output_offset
4895 /* If this is a PC relative reloc, then the addend is
4896 the difference in VMA between the destination and the
4897 source. We have just adjusted for the change in VMA
4898 of the destination, so we must also adjust by the
4899 change in VMA of the source. This is done below. */
4902 /* As described above, we must always adjust a PC relative
4903 reloc by the change in VMA of the source. */
4904 if (howto_table_ext[r_type].pc_relative)
4905 relocation -= (input_section->output_section->vma
4906 + input_section->output_offset
4907 - input_section->vma);
4909 /* Change the addend if necessary. */
4910 if (relocation != 0)
4911 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
4913 /* Change the address of the relocation. */
4914 PUT_WORD (output_bfd,
4915 r_addr + input_section->output_offset,
4921 bfd_reloc_status_type r;
4923 /* We are generating an executable, and must do a full
4928 h = sym_hashes[r_index];
4930 if (h != (struct aout_link_hash_entry *) NULL
4931 && (h->root.type == bfd_link_hash_defined
4932 || h->root.type == bfd_link_hash_defweak))
4934 relocation = (h->root.u.def.value
4935 + h->root.u.def.section->output_section->vma
4936 + h->root.u.def.section->output_offset);
4938 else if (h != (struct aout_link_hash_entry *) NULL
4939 && h->root.type == bfd_link_hash_undefweak)
4947 else if (r_type == RELOC_BASE10
4948 || r_type == RELOC_BASE13
4949 || r_type == RELOC_BASE22)
4951 struct external_nlist *sym;
4954 /* For base relative relocs, r_index is always an index
4955 into the symbol table, even if r_extern is 0. */
4956 sym = syms + r_index;
4957 type = bfd_h_get_8 (input_bfd, sym->e_type);
4958 if ((type & N_TYPE) == N_TEXT
4960 r_section = obj_textsec (input_bfd);
4961 else if ((type & N_TYPE) == N_DATA
4963 r_section = obj_datasec (input_bfd);
4964 else if ((type & N_TYPE) == N_BSS
4966 r_section = obj_bsssec (input_bfd);
4967 else if ((type & N_TYPE) == N_ABS
4969 r_section = bfd_abs_section_ptr;
4972 relocation = (r_section->output_section->vma
4973 + r_section->output_offset
4974 + (GET_WORD (input_bfd, sym->e_value)
4979 r_section = aout_reloc_index_to_section (input_bfd, r_index);
4981 /* If this is a PC relative reloc, then R_ADDEND is the
4982 difference between the two vmas, or
4983 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
4985 old_dest_sec == section->vma
4987 old_src_sec == input_section->vma
4989 old_src_off == r_addr
4991 _bfd_final_link_relocate expects RELOCATION +
4992 R_ADDEND to be the VMA of the destination minus
4993 r_addr (the minus r_addr is because this relocation
4994 is not pcrel_offset, which is a bit confusing and
4995 should, perhaps, be changed), or
4998 new_dest_sec == output_section->vma + output_offset
4999 We arrange for this to happen by setting RELOCATION to
5000 new_dest_sec + old_src_sec - old_dest_sec
5002 If this is not a PC relative reloc, then R_ADDEND is
5003 simply the VMA of the destination, so we set
5004 RELOCATION to the change in the destination VMA, or
5005 new_dest_sec - old_dest_sec
5007 relocation = (r_section->output_section->vma
5008 + r_section->output_offset
5010 if (howto_table_ext[r_type].pc_relative)
5011 relocation += input_section->vma;
5014 if (check_dynamic_reloc != NULL)
5018 if (! ((*check_dynamic_reloc)
5019 (finfo->info, input_bfd, input_section, h,
5020 (PTR) rel, contents, &skip, &relocation)))
5026 /* Now warn if a global symbol is undefined. We could not
5027 do this earlier, because check_dynamic_reloc might want
5028 to skip this reloc. */
5030 && ! finfo->info->shared
5031 && r_type != RELOC_BASE10
5032 && r_type != RELOC_BASE13
5033 && r_type != RELOC_BASE22)
5037 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5038 if (! ((*finfo->info->callbacks->undefined_symbol)
5039 (finfo->info, name, input_bfd, input_section, r_addr)))
5043 r = MY_final_link_relocate (howto_table_ext + r_type,
5044 input_bfd, input_section,
5045 contents, r_addr, relocation,
5047 if (r != bfd_reloc_ok)
5052 case bfd_reloc_outofrange:
5054 case bfd_reloc_overflow:
5059 || r_type == RELOC_BASE10
5060 || r_type == RELOC_BASE13
5061 || r_type == RELOC_BASE22)
5062 name = strings + GET_WORD (input_bfd,
5063 syms[r_index].e_strx);
5068 s = aout_reloc_index_to_section (input_bfd, r_index);
5069 name = bfd_section_name (input_bfd, s);
5071 if (! ((*finfo->info->callbacks->reloc_overflow)
5072 (finfo->info, name, howto_table_ext[r_type].name,
5073 r_addend, input_bfd, input_section, r_addr)))
5085 /* Handle a link order which is supposed to generate a reloc. */
5088 aout_link_reloc_link_order (finfo, o, p)
5089 struct aout_final_link_info *finfo;
5091 struct bfd_link_order *p;
5093 struct bfd_link_order_reloc *pr;
5096 reloc_howto_type *howto;
5097 file_ptr *reloff_ptr;
5098 struct reloc_std_external srel;
5099 struct reloc_ext_external erel;
5104 if (p->type == bfd_section_reloc_link_order)
5107 if (bfd_is_abs_section (pr->u.section))
5108 r_index = N_ABS | N_EXT;
5111 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5112 r_index = pr->u.section->target_index;
5117 struct aout_link_hash_entry *h;
5119 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5121 h = aout_link_hash_lookup (aout_hash_table (finfo->info),
5122 pr->u.name, false, false, true);
5123 if (h != (struct aout_link_hash_entry *) NULL
5128 /* We decided to strip this symbol, but it turns out that we
5129 can't. Note that we lose the other and desc information
5130 here. I don't think that will ever matter for a global
5134 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5140 if (! ((*finfo->info->callbacks->unattached_reloc)
5141 (finfo->info, pr->u.name, (bfd *) NULL,
5142 (asection *) NULL, (bfd_vma) 0)))
5148 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5151 bfd_set_error (bfd_error_bad_value);
5155 if (o == obj_textsec (finfo->output_bfd))
5156 reloff_ptr = &finfo->treloff;
5157 else if (o == obj_datasec (finfo->output_bfd))
5158 reloff_ptr = &finfo->dreloff;
5162 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5165 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto,
5175 r_pcrel = howto->pc_relative;
5176 r_baserel = (howto->type & 8) != 0;
5177 r_jmptable = (howto->type & 16) != 0;
5178 r_relative = (howto->type & 32) != 0;
5179 r_length = howto->size;
5181 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5182 if (finfo->output_bfd->xvec->header_byteorder_big_p)
5184 srel.r_index[0] = r_index >> 16;
5185 srel.r_index[1] = r_index >> 8;
5186 srel.r_index[2] = r_index;
5188 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5189 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5190 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5191 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5192 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5193 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5197 srel.r_index[2] = r_index >> 16;
5198 srel.r_index[1] = r_index >> 8;
5199 srel.r_index[0] = r_index;
5201 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5202 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5203 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5204 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5205 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5206 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5210 rel_ptr = (PTR) &srel;
5212 /* We have to write the addend into the object file, since
5213 standard a.out relocs are in place. It would be more
5214 reliable if we had the current contents of the file here,
5215 rather than assuming zeroes, but we can't read the file since
5216 it was opened using bfd_openw. */
5217 if (pr->addend != 0)
5220 bfd_reloc_status_type r;
5224 size = bfd_get_reloc_size (howto);
5225 buf = (bfd_byte *) bfd_zmalloc (size);
5226 if (buf == (bfd_byte *) NULL)
5228 bfd_set_error (bfd_error_no_memory);
5231 r = MY_relocate_contents (howto, finfo->output_bfd,
5238 case bfd_reloc_outofrange:
5240 case bfd_reloc_overflow:
5241 if (! ((*finfo->info->callbacks->reloc_overflow)
5243 (p->type == bfd_section_reloc_link_order
5244 ? bfd_section_name (finfo->output_bfd,
5247 howto->name, pr->addend, (bfd *) NULL,
5248 (asection *) NULL, (bfd_vma) 0)))
5255 ok = bfd_set_section_contents (finfo->output_bfd, o,
5257 (file_ptr) p->offset,
5266 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5268 if (finfo->output_bfd->xvec->header_byteorder_big_p)
5270 erel.r_index[0] = r_index >> 16;
5271 erel.r_index[1] = r_index >> 8;
5272 erel.r_index[2] = r_index;
5274 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5275 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5279 erel.r_index[2] = r_index >> 16;
5280 erel.r_index[1] = r_index >> 8;
5281 erel.r_index[0] = r_index;
5283 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5284 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5287 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
5289 rel_ptr = (PTR) &erel;
5292 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5293 || (bfd_write (rel_ptr, (bfd_size_type) 1,
5294 obj_reloc_entry_size (finfo->output_bfd),
5296 != obj_reloc_entry_size (finfo->output_bfd)))
5299 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5301 /* Assert that the relocs have not run into the symbols, and that n
5302 the text relocs have not run into the data relocs. */
5303 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5304 && (reloff_ptr != &finfo->treloff
5306 <= obj_datasec (finfo->output_bfd)->rel_filepos)));