1 /* BFD semi-generic back-end for a.out binaries.
2 Copyright 1990, 91, 92, 93, 94, 95, 1996 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 */
130 #include "aout/aout64.h"
131 #include "aout/stab_gnu.h"
134 static boolean aout_get_external_symbols PARAMS ((bfd *));
135 static boolean translate_from_native_sym_flags
136 PARAMS ((bfd *, aout_symbol_type *));
137 static boolean translate_to_native_sym_flags
138 PARAMS ((bfd *, asymbol *, struct external_nlist *));
145 The file @file{aoutx.h} provides for both the @emph{standard}
146 and @emph{extended} forms of a.out relocation records.
148 The standard records contain only an
149 address, a symbol index, and a type field. The extended records
150 (used on 29ks and sparcs) also have a full integer for an
154 #ifndef CTOR_TABLE_RELOC_HOWTO
155 #define CTOR_TABLE_RELOC_IDX 2
156 #define CTOR_TABLE_RELOC_HOWTO(BFD) ((obj_reloc_entry_size(BFD) == RELOC_EXT_SIZE \
157 ? howto_table_ext : howto_table_std) \
158 + CTOR_TABLE_RELOC_IDX)
161 #ifndef MY_swap_std_reloc_in
162 #define MY_swap_std_reloc_in NAME(aout,swap_std_reloc_in)
165 #ifndef MY_swap_std_reloc_out
166 #define MY_swap_std_reloc_out NAME(aout,swap_std_reloc_out)
169 #ifndef MY_final_link_relocate
170 #define MY_final_link_relocate _bfd_final_link_relocate
173 #ifndef MY_relocate_contents
174 #define MY_relocate_contents _bfd_relocate_contents
177 #define howto_table_ext NAME(aout,ext_howto_table)
178 #define howto_table_std NAME(aout,std_howto_table)
180 reloc_howto_type howto_table_ext[] =
182 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
183 HOWTO(RELOC_8, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", false, 0,0x000000ff, false),
184 HOWTO(RELOC_16, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", false, 0,0x0000ffff, false),
185 HOWTO(RELOC_32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", false, 0,0xffffffff, false),
186 HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed,0,"DISP8", false, 0,0x000000ff, false),
187 HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", false, 0,0x0000ffff, false),
188 HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed,0,"DISP32", false, 0,0xffffffff, false),
189 HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, complain_overflow_signed,0,"WDISP30", false, 0,0x3fffffff, false),
190 HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, complain_overflow_signed,0,"WDISP22", false, 0,0x003fffff, false),
191 HOWTO(RELOC_HI22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"HI22", false, 0,0x003fffff, false),
192 HOWTO(RELOC_22, 0, 2, 22, false, 0, complain_overflow_bitfield,0,"22", false, 0,0x003fffff, false),
193 HOWTO(RELOC_13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"13", false, 0,0x00001fff, false),
194 HOWTO(RELOC_LO10, 0, 2, 10, false, 0, complain_overflow_dont,0,"LO10", false, 0,0x000003ff, false),
195 HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, complain_overflow_bitfield,0,"SFA_BASE", false, 0,0xffffffff, false),
196 HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, complain_overflow_bitfield,0,"SFA_OFF13",false, 0,0xffffffff, false),
197 HOWTO(RELOC_BASE10, 0, 2, 10, false, 0, complain_overflow_dont,0,"BASE10", false, 0,0x000003ff, false),
198 HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, complain_overflow_bitfield,0,"BASE13", false, 0,0x00001fff, false),
199 HOWTO(RELOC_BASE22, 10, 2, 22, false, 0, complain_overflow_bitfield,0,"BASE22", false, 0,0x003fffff, false),
200 HOWTO(RELOC_PC10, 0, 2, 10, true, 0, complain_overflow_dont,0,"PC10", false, 0,0x000003ff, true),
201 HOWTO(RELOC_PC22, 10, 2, 22, true, 0, complain_overflow_signed,0,"PC22", false, 0,0x003fffff, true),
202 HOWTO(RELOC_JMP_TBL,2, 2, 30, true, 0, complain_overflow_signed,0,"JMP_TBL", false, 0,0x3fffffff, false),
203 HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, complain_overflow_bitfield,0,"SEGOFF16", false, 0,0x00000000, false),
204 HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"GLOB_DAT", false, 0,0x00000000, false),
205 HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_SLOT", false, 0,0x00000000, false),
206 HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
209 /* Convert standard reloc records to "arelent" format (incl byte swap). */
211 reloc_howto_type howto_table_std[] = {
212 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
213 HOWTO( 0, 0, 0, 8, false, 0, complain_overflow_bitfield,0,"8", true, 0x000000ff,0x000000ff, false),
214 HOWTO( 1, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"16", true, 0x0000ffff,0x0000ffff, false),
215 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"32", true, 0xffffffff,0xffffffff, false),
216 HOWTO( 3, 0, 4, 64, false, 0, complain_overflow_bitfield,0,"64", true, 0xdeaddead,0xdeaddead, false),
217 HOWTO( 4, 0, 0, 8, true, 0, complain_overflow_signed, 0,"DISP8", true, 0x000000ff,0x000000ff, false),
218 HOWTO( 5, 0, 1, 16, true, 0, complain_overflow_signed, 0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
219 HOWTO( 6, 0, 2, 32, true, 0, complain_overflow_signed, 0,"DISP32", true, 0xffffffff,0xffffffff, false),
220 HOWTO( 7, 0, 4, 64, true, 0, complain_overflow_signed, 0,"DISP64", true, 0xfeedface,0xfeedface, false),
221 HOWTO( 8, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"GOT_REL", false, 0,0x00000000, false),
222 HOWTO( 9, 0, 1, 16, false, 0, complain_overflow_bitfield,0,"BASE16", false,0xffffffff,0xffffffff, false),
223 HOWTO(10, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"BASE32", false,0xffffffff,0xffffffff, false),
229 HOWTO(16, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"JMP_TABLE", false, 0,0x00000000, false),
237 { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 }, { -1 },
238 HOWTO(32, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"RELATIVE", false, 0,0x00000000, false),
246 HOWTO(40, 0, 2, 0, false, 0, complain_overflow_bitfield,0,"BASEREL", false, 0,0x00000000, false),
249 #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
252 NAME(aout,reloc_type_lookup) (abfd,code)
254 bfd_reloc_code_real_type code;
256 #define EXT(i,j) case i: return &howto_table_ext[j]
257 #define STD(i,j) case i: return &howto_table_std[j]
258 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
259 if (code == BFD_RELOC_CTOR)
260 switch (bfd_get_arch_info (abfd)->bits_per_address)
272 EXT (BFD_RELOC_32, 2);
273 EXT (BFD_RELOC_HI22, 8);
274 EXT (BFD_RELOC_LO10, 11);
275 EXT (BFD_RELOC_32_PCREL_S2, 6);
276 EXT (BFD_RELOC_SPARC_WDISP22, 7);
277 EXT (BFD_RELOC_SPARC13, 10);
278 EXT (BFD_RELOC_SPARC_GOT10, 14);
279 EXT (BFD_RELOC_SPARC_BASE13, 15);
280 EXT (BFD_RELOC_SPARC_GOT13, 15);
281 EXT (BFD_RELOC_SPARC_GOT22, 16);
282 EXT (BFD_RELOC_SPARC_PC10, 17);
283 EXT (BFD_RELOC_SPARC_PC22, 18);
284 EXT (BFD_RELOC_SPARC_WPLT30, 19);
285 default: return (reloc_howto_type *) NULL;
291 STD (BFD_RELOC_16, 1);
292 STD (BFD_RELOC_32, 2);
293 STD (BFD_RELOC_8_PCREL, 4);
294 STD (BFD_RELOC_16_PCREL, 5);
295 STD (BFD_RELOC_32_PCREL, 6);
296 STD (BFD_RELOC_16_BASEREL, 9);
297 STD (BFD_RELOC_32_BASEREL, 10);
298 default: return (reloc_howto_type *) NULL;
304 Internal entry points
307 @file{aoutx.h} exports several routines for accessing the
308 contents of an a.out file, which are gathered and exported in
309 turn by various format specific files (eg sunos.c).
315 aout_@var{size}_swap_exec_header_in
318 void aout_@var{size}_swap_exec_header_in,
320 struct external_exec *raw_bytes,
321 struct internal_exec *execp);
324 Swap the information in an executable header @var{raw_bytes} taken
325 from a raw byte stream memory image into the internal exec header
326 structure @var{execp}.
329 #ifndef NAME_swap_exec_header_in
331 NAME(aout,swap_exec_header_in) (abfd, raw_bytes, execp)
333 struct external_exec *raw_bytes;
334 struct internal_exec *execp;
336 struct external_exec *bytes = (struct external_exec *)raw_bytes;
338 /* The internal_exec structure has some fields that are unused in this
339 configuration (IE for i960), so ensure that all such uninitialized
340 fields are zero'd out. There are places where two of these structs
341 are memcmp'd, and thus the contents do matter. */
342 memset ((PTR) execp, 0, sizeof (struct internal_exec));
343 /* Now fill in fields in the execp, from the bytes in the raw data. */
344 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
345 execp->a_text = GET_WORD (abfd, bytes->e_text);
346 execp->a_data = GET_WORD (abfd, bytes->e_data);
347 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
348 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
349 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
350 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
351 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
353 #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
358 aout_@var{size}_swap_exec_header_out
361 void aout_@var{size}_swap_exec_header_out
363 struct internal_exec *execp,
364 struct external_exec *raw_bytes);
367 Swap the information in an internal exec header structure
368 @var{execp} into the buffer @var{raw_bytes} ready for writing to disk.
371 NAME(aout,swap_exec_header_out) (abfd, execp, raw_bytes)
373 struct internal_exec *execp;
374 struct external_exec *raw_bytes;
376 struct external_exec *bytes = (struct external_exec *)raw_bytes;
378 /* Now fill in fields in the raw data, from the fields in the exec struct. */
379 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
380 PUT_WORD (abfd, execp->a_text , bytes->e_text);
381 PUT_WORD (abfd, execp->a_data , bytes->e_data);
382 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
383 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
384 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
385 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
386 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
389 /* Make all the section for an a.out file. */
392 NAME(aout,make_sections) (abfd)
395 if (obj_textsec (abfd) == (asection *) NULL
396 && bfd_make_section (abfd, ".text") == (asection *) NULL)
398 if (obj_datasec (abfd) == (asection *) NULL
399 && bfd_make_section (abfd, ".data") == (asection *) NULL)
401 if (obj_bsssec (abfd) == (asection *) NULL
402 && bfd_make_section (abfd, ".bss") == (asection *) NULL)
409 aout_@var{size}_some_aout_object_p
412 const bfd_target *aout_@var{size}_some_aout_object_p
414 const bfd_target *(*callback_to_real_object_p)());
417 Some a.out variant thinks that the file open in @var{abfd}
418 checking is an a.out file. Do some more checking, and set up
419 for access if it really is. Call back to the calling
420 environment's "finish up" function just before returning, to
421 handle any last-minute setup.
425 NAME(aout,some_aout_object_p) (abfd, execp, callback_to_real_object_p)
427 struct internal_exec *execp;
428 const bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *));
430 struct aout_data_struct *rawptr, *oldrawptr;
431 const bfd_target *result;
433 rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
437 oldrawptr = abfd->tdata.aout_data;
438 abfd->tdata.aout_data = rawptr;
440 /* Copy the contents of the old tdata struct.
441 In particular, we want the subformat, since for hpux it was set in
442 hp300hpux.c:swap_exec_header_in and will be used in
443 hp300hpux.c:callback. */
444 if (oldrawptr != NULL)
445 *abfd->tdata.aout_data = *oldrawptr;
447 abfd->tdata.aout_data->a.hdr = &rawptr->e;
448 *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */
449 execp = abfd->tdata.aout_data->a.hdr;
451 /* Set the file flags */
452 abfd->flags = NO_FLAGS;
453 if (execp->a_drsize || execp->a_trsize)
454 abfd->flags |= HAS_RELOC;
455 /* Setting of EXEC_P has been deferred to the bottom of this function */
457 abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
458 if (N_DYNAMIC(*execp))
459 abfd->flags |= DYNAMIC;
461 if (N_MAGIC (*execp) == ZMAGIC)
463 abfd->flags |= D_PAGED | WP_TEXT;
464 adata (abfd).magic = z_magic;
466 else if (N_MAGIC (*execp) == QMAGIC)
468 abfd->flags |= D_PAGED | WP_TEXT;
469 adata (abfd).magic = z_magic;
470 adata (abfd).subformat = q_magic_format;
472 else if (N_MAGIC (*execp) == NMAGIC)
474 abfd->flags |= WP_TEXT;
475 adata (abfd).magic = n_magic;
477 else if (N_MAGIC (*execp) == OMAGIC
478 || N_MAGIC (*execp) == BMAGIC)
479 adata (abfd).magic = o_magic;
482 /* Should have been checked with N_BADMAG before this routine
487 bfd_get_start_address (abfd) = execp->a_entry;
489 obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
490 bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
492 /* The default relocation entry size is that of traditional V7 Unix. */
493 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
495 /* The default symbol entry size is that of traditional Unix. */
496 obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
499 bfd_init_window (&obj_aout_sym_window (abfd));
500 bfd_init_window (&obj_aout_string_window (abfd));
502 obj_aout_external_syms (abfd) = NULL;
503 obj_aout_external_strings (abfd) = NULL;
504 obj_aout_sym_hashes (abfd) = NULL;
506 if (! NAME(aout,make_sections) (abfd))
509 obj_datasec (abfd)->_raw_size = execp->a_data;
510 obj_bsssec (abfd)->_raw_size = execp->a_bss;
512 obj_textsec (abfd)->flags =
513 (execp->a_trsize != 0
514 ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
515 : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
516 obj_datasec (abfd)->flags =
517 (execp->a_drsize != 0
518 ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
519 : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
520 obj_bsssec (abfd)->flags = SEC_ALLOC;
522 #ifdef THIS_IS_ONLY_DOCUMENTATION
523 /* The common code can't fill in these things because they depend
524 on either the start address of the text segment, the rounding
525 up of virtual addresses between segments, or the starting file
526 position of the text segment -- all of which varies among different
527 versions of a.out. */
529 /* Call back to the format-dependent code to fill in the rest of the
530 fields and do any further cleanup. Things that should be filled
531 in by the callback: */
533 struct exec *execp = exec_hdr (abfd);
535 obj_textsec (abfd)->size = N_TXTSIZE(*execp);
536 obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp);
537 /* data and bss are already filled in since they're so standard */
539 /* The virtual memory addresses of the sections */
540 obj_textsec (abfd)->vma = N_TXTADDR(*execp);
541 obj_datasec (abfd)->vma = N_DATADDR(*execp);
542 obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
544 /* The file offsets of the sections */
545 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
546 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
548 /* The file offsets of the relocation info */
549 obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
550 obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
552 /* The file offsets of the string table and symbol table. */
553 obj_str_filepos (abfd) = N_STROFF (*execp);
554 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
556 /* Determine the architecture and machine type of the object file. */
557 switch (N_MACHTYPE (*exec_hdr (abfd))) {
559 abfd->obj_arch = bfd_arch_obscure;
563 adata(abfd)->page_size = TARGET_PAGE_SIZE;
564 adata(abfd)->segment_size = SEGMENT_SIZE;
565 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
569 /* The architecture is encoded in various ways in various a.out variants,
570 or is not encoded at all in some of them. The relocation size depends
571 on the architecture and the a.out variant. Finally, the return value
572 is the bfd_target vector in use. If an error occurs, return zero and
573 set bfd_error to the appropriate error code.
575 Formats such as b.out, which have additional fields in the a.out
576 header, should cope with them in this callback as well. */
577 #endif /* DOCUMENTATION */
579 result = (*callback_to_real_object_p)(abfd);
581 /* Now that the segment addresses have been worked out, take a better
582 guess at whether the file is executable. If the entry point
583 is within the text segment, assume it is. (This makes files
584 executable even if their entry point address is 0, as long as
585 their text starts at zero.). */
586 if ((execp->a_entry >= obj_textsec(abfd)->vma) &&
587 (execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
588 abfd->flags |= EXEC_P;
592 struct stat stat_buf;
594 /* The original heuristic doesn't work in some important cases.
595 The a.out file has no information about the text start
596 address. For files (like kernels) linked to non-standard
597 addresses (ld -Ttext nnn) the entry point may not be between
598 the default text start (obj_textsec(abfd)->vma) and
599 (obj_textsec(abfd)->vma) + text size. This is not just a mach
600 issue. Many kernels are loaded at non standard addresses. */
601 if (abfd->iostream != NULL
602 && (abfd->flags & BFD_IN_MEMORY) == 0
603 && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0)
604 && ((stat_buf.st_mode & 0111) != 0))
605 abfd->flags |= EXEC_P;
607 #endif /* STAT_FOR_EXEC */
611 #if 0 /* These should be set correctly anyways. */
612 abfd->sections = obj_textsec (abfd);
613 obj_textsec (abfd)->next = obj_datasec (abfd);
614 obj_datasec (abfd)->next = obj_bsssec (abfd);
620 abfd->tdata.aout_data = oldrawptr;
627 aout_@var{size}_mkobject
630 boolean aout_@var{size}_mkobject, (bfd *abfd);
633 Initialize BFD @var{abfd} for use with a.out files.
637 NAME(aout,mkobject) (abfd)
640 struct aout_data_struct *rawptr;
642 bfd_set_error (bfd_error_system_call);
644 /* Use an intermediate variable for clarity */
645 rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
650 abfd->tdata.aout_data = rawptr;
651 exec_hdr (abfd) = &(rawptr->e);
653 obj_textsec (abfd) = (asection *)NULL;
654 obj_datasec (abfd) = (asection *)NULL;
655 obj_bsssec (abfd) = (asection *)NULL;
663 aout_@var{size}_machine_type
666 enum machine_type aout_@var{size}_machine_type
667 (enum bfd_architecture arch,
668 unsigned long machine));
671 Keep track of machine architecture and machine type for
672 a.out's. Return the <<machine_type>> for a particular
673 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
674 and machine can't be represented in a.out format.
676 If the architecture is understood, machine type 0 (default)
677 is always understood.
681 NAME(aout,machine_type) (arch, machine, unknown)
682 enum bfd_architecture arch;
683 unsigned long machine;
686 enum machine_type arch_flags;
688 arch_flags = M_UNKNOWN;
694 || machine == bfd_mach_sparc
695 || machine == bfd_mach_sparc_v9)
696 arch_flags = M_SPARC;
701 case 0: arch_flags = M_68010; break;
702 case 68000: arch_flags = M_UNKNOWN; *unknown = false; break;
703 case 68010: arch_flags = M_68010; break;
704 case 68020: arch_flags = M_68020; break;
705 default: arch_flags = M_UNKNOWN; break;
710 if (machine == 0) arch_flags = M_386;
714 if (machine == 0) arch_flags = M_29K;
718 if (machine == 0) arch_flags = M_ARM;
725 case 3000: arch_flags = M_MIPS1; break;
726 case 4000: /* mips3 */
728 case 8000: /* mips4 */
730 case 6000: arch_flags = M_MIPS2; break;
731 default: arch_flags = M_UNKNOWN; break;
737 case 0: arch_flags = M_NS32532; break;
738 case 32032: arch_flags = M_NS32032; break;
739 case 32532: arch_flags = M_NS32532; break;
740 default: arch_flags = M_UNKNOWN; break;
750 arch_flags = M_UNKNOWN;
753 if (arch_flags != M_UNKNOWN)
762 aout_@var{size}_set_arch_mach
765 boolean aout_@var{size}_set_arch_mach,
767 enum bfd_architecture arch,
768 unsigned long machine));
771 Set the architecture and the machine of the BFD @var{abfd} to the
772 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
773 can support the architecture required.
777 NAME(aout,set_arch_mach) (abfd, arch, machine)
779 enum bfd_architecture arch;
780 unsigned long machine;
782 if (! bfd_default_set_arch_mach (abfd, arch, machine))
785 if (arch != bfd_arch_unknown)
789 NAME(aout,machine_type) (arch, machine, &unknown);
794 /* Determine the size of a relocation entry */
799 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
802 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
806 return (*aout_backend_info(abfd)->set_sizes) (abfd);
810 adjust_o_magic (abfd, execp)
812 struct internal_exec *execp;
814 file_ptr pos = adata (abfd).exec_bytes_size;
819 obj_textsec(abfd)->filepos = pos;
820 if (!obj_textsec(abfd)->user_set_vma)
821 obj_textsec(abfd)->vma = vma;
823 vma = obj_textsec(abfd)->vma;
825 pos += obj_textsec(abfd)->_raw_size;
826 vma += obj_textsec(abfd)->_raw_size;
829 if (!obj_datasec(abfd)->user_set_vma)
831 #if 0 /* ?? Does alignment in the file image really matter? */
832 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
834 obj_textsec(abfd)->_raw_size += pad;
837 obj_datasec(abfd)->vma = vma;
840 vma = obj_datasec(abfd)->vma;
841 obj_datasec(abfd)->filepos = pos;
842 pos += obj_datasec(abfd)->_raw_size;
843 vma += obj_datasec(abfd)->_raw_size;
846 if (!obj_bsssec(abfd)->user_set_vma)
849 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
851 obj_datasec(abfd)->_raw_size += pad;
854 obj_bsssec(abfd)->vma = vma;
858 /* The VMA of the .bss section is set by the the VMA of the
859 .data section plus the size of the .data section. We may
860 need to add padding bytes to make this true. */
861 pad = obj_bsssec (abfd)->vma - vma;
864 obj_datasec (abfd)->_raw_size += pad;
868 obj_bsssec(abfd)->filepos = pos;
870 /* Fix up the exec header. */
871 execp->a_text = obj_textsec(abfd)->_raw_size;
872 execp->a_data = obj_datasec(abfd)->_raw_size;
873 execp->a_bss = obj_bsssec(abfd)->_raw_size;
874 N_SET_MAGIC (*execp, OMAGIC);
878 adjust_z_magic (abfd, execp)
880 struct internal_exec *execp;
882 bfd_size_type data_pad, text_pad;
884 CONST struct aout_backend_data *abdp;
885 int ztih; /* Nonzero if text includes exec header. */
887 abdp = aout_backend_info (abfd);
891 && (abdp->text_includes_header
892 || obj_aout_subformat (abfd) == q_magic_format));
893 obj_textsec(abfd)->filepos = (ztih
894 ? adata(abfd).exec_bytes_size
895 : adata(abfd).zmagic_disk_block_size);
896 if (! obj_textsec(abfd)->user_set_vma)
898 /* ?? Do we really need to check for relocs here? */
899 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
902 ? (abdp->default_text_vma
903 + adata(abfd).exec_bytes_size)
904 : abdp->default_text_vma));
909 /* The .text section is being loaded at an unusual address. We
910 may need to pad it such that the .data section starts at a page
913 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
914 & (adata (abfd).page_size - 1));
916 text_pad = ((- obj_textsec (abfd)->vma)
917 & (adata (abfd).page_size - 1));
920 /* Find start of data. */
923 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
924 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
928 /* Note that if page_size == zmagic_disk_block_size, then
929 filepos == page_size, and this case is the same as the ztih
931 text_end = obj_textsec (abfd)->_raw_size;
932 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
933 text_end += obj_textsec (abfd)->filepos;
935 obj_textsec(abfd)->_raw_size += text_pad;
936 text_end += text_pad;
939 if (!obj_datasec(abfd)->user_set_vma)
942 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
943 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
945 if (abdp && abdp->zmagic_mapped_contiguous)
947 text_pad = (obj_datasec(abfd)->vma
948 - obj_textsec(abfd)->vma
949 - obj_textsec(abfd)->_raw_size);
950 obj_textsec(abfd)->_raw_size += text_pad;
952 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
953 + obj_textsec(abfd)->_raw_size);
955 /* Fix up exec header while we're at it. */
956 execp->a_text = obj_textsec(abfd)->_raw_size;
957 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
958 execp->a_text += adata(abfd).exec_bytes_size;
959 if (obj_aout_subformat (abfd) == q_magic_format)
960 N_SET_MAGIC (*execp, QMAGIC);
962 N_SET_MAGIC (*execp, ZMAGIC);
964 /* Spec says data section should be rounded up to page boundary. */
965 obj_datasec(abfd)->_raw_size
966 = align_power (obj_datasec(abfd)->_raw_size,
967 obj_bsssec(abfd)->alignment_power);
968 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
969 adata(abfd).page_size);
970 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
973 if (!obj_bsssec(abfd)->user_set_vma)
974 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
975 + obj_datasec(abfd)->_raw_size);
976 /* If the BSS immediately follows the data section and extra space
977 in the page is left after the data section, fudge data
978 in the header so that the bss section looks smaller by that
979 amount. We'll start the bss section there, and lie to the OS.
980 (Note that a linker script, as well as the above assignment,
981 could have explicitly set the BSS vma to immediately follow
982 the data section.) */
983 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
984 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
985 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
986 obj_bsssec(abfd)->_raw_size - data_pad;
988 execp->a_bss = obj_bsssec(abfd)->_raw_size;
992 adjust_n_magic (abfd, execp)
994 struct internal_exec *execp;
996 file_ptr pos = adata(abfd).exec_bytes_size;
1001 obj_textsec(abfd)->filepos = pos;
1002 if (!obj_textsec(abfd)->user_set_vma)
1003 obj_textsec(abfd)->vma = vma;
1005 vma = obj_textsec(abfd)->vma;
1006 pos += obj_textsec(abfd)->_raw_size;
1007 vma += obj_textsec(abfd)->_raw_size;
1010 obj_datasec(abfd)->filepos = pos;
1011 if (!obj_datasec(abfd)->user_set_vma)
1012 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1013 vma = obj_datasec(abfd)->vma;
1015 /* Since BSS follows data immediately, see if it needs alignment. */
1016 vma += obj_datasec(abfd)->_raw_size;
1017 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
1018 obj_datasec(abfd)->_raw_size += pad;
1019 pos += obj_datasec(abfd)->_raw_size;
1022 if (!obj_bsssec(abfd)->user_set_vma)
1023 obj_bsssec(abfd)->vma = vma;
1025 vma = obj_bsssec(abfd)->vma;
1027 /* Fix up exec header. */
1028 execp->a_text = obj_textsec(abfd)->_raw_size;
1029 execp->a_data = obj_datasec(abfd)->_raw_size;
1030 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1031 N_SET_MAGIC (*execp, NMAGIC);
1035 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1037 bfd_size_type *text_size;
1040 struct internal_exec *execp = exec_hdr (abfd);
1042 if (! NAME(aout,make_sections) (abfd))
1045 if (adata(abfd).magic != undecided_magic)
1048 obj_textsec(abfd)->_raw_size =
1049 align_power(obj_textsec(abfd)->_raw_size,
1050 obj_textsec(abfd)->alignment_power);
1052 *text_size = obj_textsec (abfd)->_raw_size;
1053 /* Rule (heuristic) for when to pad to a new page. Note that there
1054 are (at least) two ways demand-paged (ZMAGIC) files have been
1055 handled. Most Berkeley-based systems start the text segment at
1056 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1057 segment right after the exec header; the latter is counted in the
1058 text segment size, and is paged in by the kernel with the rest of
1061 /* This perhaps isn't the right way to do this, but made it simpler for me
1062 to understand enough to implement it. Better would probably be to go
1063 right from BFD flags to alignment/positioning characteristics. But the
1064 old code was sloppy enough about handling the flags, and had enough
1065 other magic, that it was a little hard for me to understand. I think
1066 I understand it better now, but I haven't time to do the cleanup this
1069 if (abfd->flags & D_PAGED)
1070 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1071 adata(abfd).magic = z_magic;
1072 else if (abfd->flags & WP_TEXT)
1073 adata(abfd).magic = n_magic;
1075 adata(abfd).magic = o_magic;
1077 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1079 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1081 switch (adata(abfd).magic) {
1082 case n_magic: str = "NMAGIC"; break;
1083 case o_magic: str = "OMAGIC"; break;
1084 case z_magic: str = "ZMAGIC"; break;
1089 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1090 obj_textsec(abfd)->alignment_power,
1091 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1092 obj_datasec(abfd)->alignment_power,
1093 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
1094 obj_bsssec(abfd)->alignment_power);
1098 switch (adata(abfd).magic)
1101 adjust_o_magic (abfd, execp);
1104 adjust_z_magic (abfd, execp);
1107 adjust_n_magic (abfd, execp);
1113 #ifdef BFD_AOUT_DEBUG
1114 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1115 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1116 obj_textsec(abfd)->filepos,
1117 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1118 obj_datasec(abfd)->filepos,
1119 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
1127 aout_@var{size}_new_section_hook
1130 boolean aout_@var{size}_new_section_hook,
1132 asection *newsect));
1135 Called by the BFD in response to a @code{bfd_make_section}
1139 NAME(aout,new_section_hook) (abfd, newsect)
1143 /* align to double at least */
1144 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1147 if (bfd_get_format (abfd) == bfd_object)
1149 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1150 obj_textsec(abfd)= newsect;
1151 newsect->target_index = N_TEXT;
1155 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1156 obj_datasec(abfd) = newsect;
1157 newsect->target_index = N_DATA;
1161 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1162 obj_bsssec(abfd) = newsect;
1163 newsect->target_index = N_BSS;
1169 /* We allow more than three sections internally */
1174 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1179 bfd_size_type count;
1182 bfd_size_type text_size;
1184 if (! abfd->output_has_begun)
1186 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1190 if (section == obj_bsssec (abfd))
1192 bfd_set_error (bfd_error_no_contents);
1196 if (section != obj_textsec (abfd)
1197 && section != obj_datasec (abfd))
1199 (*_bfd_error_handler)
1200 ("%s: can not represent section `%s' in a.out object file format",
1201 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
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;
1230 if (bfd_get_file_window (abfd,
1231 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms,
1232 &obj_aout_sym_window (abfd), true) == false)
1234 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1236 /* We allocate using malloc to make the values easy to free
1237 later on. If we put them on the obstack it might not be
1238 possible to free them. */
1239 syms = ((struct external_nlist *)
1240 bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1241 if (syms == (struct external_nlist *) NULL && count != 0)
1244 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1245 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1246 != exec_hdr (abfd)->a_syms))
1253 obj_aout_external_syms (abfd) = syms;
1254 obj_aout_external_sym_count (abfd) = count;
1257 if (obj_aout_external_strings (abfd) == NULL
1258 && exec_hdr (abfd)->a_syms != 0)
1260 unsigned char string_chars[BYTES_IN_WORD];
1261 bfd_size_type stringsize;
1264 /* Get the size of the strings. */
1265 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1266 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1269 stringsize = GET_WORD (abfd, string_chars);
1272 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1273 &obj_aout_string_window (abfd), true) == false)
1275 strings = (char *) obj_aout_string_window (abfd).data;
1277 strings = (char *) bfd_malloc ((size_t) stringsize + 1);
1278 if (strings == NULL)
1281 /* Skip space for the string count in the buffer for convenience
1282 when using indexes. */
1283 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1285 != stringsize - BYTES_IN_WORD)
1292 /* Ensure that a zero index yields an empty string. */
1295 strings[stringsize - 1] = 0;
1297 obj_aout_external_strings (abfd) = strings;
1298 obj_aout_external_string_size (abfd) = stringsize;
1304 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1305 and symbol->value fields of CACHE_PTR will be set from the a.out
1306 nlist structure. This function is responsible for setting
1307 symbol->flags and symbol->section, and adjusting symbol->value. */
1310 translate_from_native_sym_flags (abfd, cache_ptr)
1312 aout_symbol_type *cache_ptr;
1316 if ((cache_ptr->type & N_STAB) != 0
1317 || cache_ptr->type == N_FN)
1321 /* This is a debugging symbol. */
1323 cache_ptr->symbol.flags = BSF_DEBUGGING;
1325 /* Work out the symbol section. */
1326 switch (cache_ptr->type & N_TYPE)
1330 sec = obj_textsec (abfd);
1333 sec = obj_datasec (abfd);
1336 sec = obj_bsssec (abfd);
1340 sec = bfd_abs_section_ptr;
1344 cache_ptr->symbol.section = sec;
1345 cache_ptr->symbol.value -= sec->vma;
1350 /* Get the default visibility. This does not apply to all types, so
1351 we just hold it in a local variable to use if wanted. */
1352 if ((cache_ptr->type & N_EXT) == 0)
1353 visible = BSF_LOCAL;
1355 visible = BSF_GLOBAL;
1357 switch (cache_ptr->type)
1360 case N_ABS: case N_ABS | N_EXT:
1361 cache_ptr->symbol.section = bfd_abs_section_ptr;
1362 cache_ptr->symbol.flags = visible;
1365 case N_UNDF | N_EXT:
1366 if (cache_ptr->symbol.value != 0)
1368 /* This is a common symbol. */
1369 cache_ptr->symbol.flags = BSF_GLOBAL;
1370 cache_ptr->symbol.section = bfd_com_section_ptr;
1374 cache_ptr->symbol.flags = 0;
1375 cache_ptr->symbol.section = bfd_und_section_ptr;
1379 case N_TEXT: case N_TEXT | N_EXT:
1380 cache_ptr->symbol.section = obj_textsec (abfd);
1381 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1382 cache_ptr->symbol.flags = visible;
1385 /* N_SETV symbols used to represent set vectors placed in the
1386 data section. They are no longer generated. Theoretically,
1387 it was possible to extract the entries and combine them with
1388 new ones, although I don't know if that was ever actually
1389 done. Unless that feature is restored, treat them as data
1391 case N_SETV: case N_SETV | N_EXT:
1392 case N_DATA: case N_DATA | N_EXT:
1393 cache_ptr->symbol.section = obj_datasec (abfd);
1394 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1395 cache_ptr->symbol.flags = visible;
1398 case N_BSS: case N_BSS | N_EXT:
1399 cache_ptr->symbol.section = obj_bsssec (abfd);
1400 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1401 cache_ptr->symbol.flags = visible;
1404 case N_SETA: case N_SETA | N_EXT:
1405 case N_SETT: case N_SETT | N_EXT:
1406 case N_SETD: case N_SETD | N_EXT:
1407 case N_SETB: case N_SETB | N_EXT:
1410 arelent_chain *reloc;
1411 asection *into_section;
1413 /* This is a set symbol. The name of the symbol is the name
1414 of the set (e.g., __CTOR_LIST__). The value of the symbol
1415 is the value to add to the set. We create a section with
1416 the same name as the symbol, and add a reloc to insert the
1417 appropriate value into the section.
1419 This action is actually obsolete; it used to make the
1420 linker do the right thing, but the linker no longer uses
1423 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1424 if (section == NULL)
1428 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1432 strcpy (copy, cache_ptr->symbol.name);
1433 section = bfd_make_section (abfd, copy);
1434 if (section == NULL)
1438 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1442 /* Build a relocation entry for the constructor. */
1443 switch (cache_ptr->type & N_TYPE)
1446 into_section = bfd_abs_section_ptr;
1447 cache_ptr->type = N_ABS;
1450 into_section = obj_textsec (abfd);
1451 cache_ptr->type = N_TEXT;
1454 into_section = obj_datasec (abfd);
1455 cache_ptr->type = N_DATA;
1458 into_section = obj_bsssec (abfd);
1459 cache_ptr->type = N_BSS;
1463 /* Build a relocation pointing into the constructor section
1464 pointing at the symbol in the set vector specified. */
1465 reloc->relent.addend = cache_ptr->symbol.value;
1466 cache_ptr->symbol.section = into_section;
1467 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1469 /* We modify the symbol to belong to a section depending upon
1470 the name of the symbol, and add to the size of the section
1471 to contain a pointer to the symbol. Build a reloc entry to
1472 relocate to this symbol attached to this section. */
1473 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1475 section->reloc_count++;
1476 section->alignment_power = 2;
1478 reloc->next = section->constructor_chain;
1479 section->constructor_chain = reloc;
1480 reloc->relent.address = section->_raw_size;
1481 section->_raw_size += BYTES_IN_WORD;
1483 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd);
1485 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1490 /* This symbol is the text of a warning message. The next
1491 symbol is the symbol to associate the warning with. If a
1492 reference is made to that symbol, a warning is issued. */
1493 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1494 cache_ptr->symbol.section = bfd_abs_section_ptr;
1497 case N_INDR: case N_INDR | N_EXT:
1498 /* An indirect symbol. This consists of two symbols in a row.
1499 The first symbol is the name of the indirection. The second
1500 symbol is the name of the target. A reference to the first
1501 symbol becomes a reference to the second. */
1502 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1503 cache_ptr->symbol.section = bfd_ind_section_ptr;
1507 cache_ptr->symbol.section = bfd_und_section_ptr;
1508 cache_ptr->symbol.flags = BSF_WEAK;
1512 cache_ptr->symbol.section = bfd_abs_section_ptr;
1513 cache_ptr->symbol.flags = BSF_WEAK;
1517 cache_ptr->symbol.section = obj_textsec (abfd);
1518 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1519 cache_ptr->symbol.flags = BSF_WEAK;
1523 cache_ptr->symbol.section = obj_datasec (abfd);
1524 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1525 cache_ptr->symbol.flags = BSF_WEAK;
1529 cache_ptr->symbol.section = obj_bsssec (abfd);
1530 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1531 cache_ptr->symbol.flags = BSF_WEAK;
1538 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1541 translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1544 struct external_nlist *sym_pointer;
1546 bfd_vma value = cache_ptr->value;
1550 /* Mask out any existing type bits in case copying from one section
1552 sym_pointer->e_type[0] &= ~N_TYPE;
1554 sec = bfd_get_section (cache_ptr);
1559 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1561 (*_bfd_error_handler)
1562 ("%s: can not represent section `%s' in a.out object file format",
1563 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1564 bfd_set_error (bfd_error_nonrepresentable_section);
1568 if (sec->output_section != NULL)
1570 off = sec->output_offset;
1571 sec = sec->output_section;
1574 if (bfd_is_abs_section (sec))
1575 sym_pointer->e_type[0] |= N_ABS;
1576 else if (sec == obj_textsec (abfd))
1577 sym_pointer->e_type[0] |= N_TEXT;
1578 else if (sec == obj_datasec (abfd))
1579 sym_pointer->e_type[0] |= N_DATA;
1580 else if (sec == obj_bsssec (abfd))
1581 sym_pointer->e_type[0] |= N_BSS;
1582 else if (bfd_is_und_section (sec))
1583 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1584 else if (bfd_is_ind_section (sec))
1585 sym_pointer->e_type[0] = N_INDR;
1586 else if (bfd_is_com_section (sec))
1587 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1590 (*_bfd_error_handler)
1591 ("%s: can not represent section `%s' in a.out object file format",
1592 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1593 bfd_set_error (bfd_error_nonrepresentable_section);
1597 /* Turn the symbol from section relative to absolute again */
1598 value += sec->vma + off;
1600 if ((cache_ptr->flags & BSF_WARNING) != 0)
1601 sym_pointer->e_type[0] = N_WARNING;
1603 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1604 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1605 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1606 sym_pointer->e_type[0] |= N_EXT;
1608 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1610 int type = ((aout_symbol_type *) cache_ptr)->type;
1613 case N_ABS: type = N_SETA; break;
1614 case N_TEXT: type = N_SETT; break;
1615 case N_DATA: type = N_SETD; break;
1616 case N_BSS: type = N_SETB; break;
1618 sym_pointer->e_type[0] = type;
1621 if ((cache_ptr->flags & BSF_WEAK) != 0)
1625 switch (sym_pointer->e_type[0] & N_TYPE)
1628 case N_ABS: type = N_WEAKA; break;
1629 case N_TEXT: type = N_WEAKT; break;
1630 case N_DATA: type = N_WEAKD; break;
1631 case N_BSS: type = N_WEAKB; break;
1632 case N_UNDF: type = N_WEAKU; break;
1634 sym_pointer->e_type[0] = type;
1637 PUT_WORD(abfd, value, sym_pointer->e_value);
1642 /* Native-level interface to symbols. */
1645 NAME(aout,make_empty_symbol) (abfd)
1648 aout_symbol_type *new =
1649 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1652 new->symbol.the_bfd = abfd;
1654 return &new->symbol;
1657 /* Translate a set of internal symbols into external symbols. */
1660 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1662 aout_symbol_type *in;
1663 struct external_nlist *ext;
1664 bfd_size_type count;
1666 bfd_size_type strsize;
1669 struct external_nlist *ext_end;
1671 ext_end = ext + count;
1672 for (; ext < ext_end; ext++, in++)
1676 x = GET_WORD (abfd, ext->e_strx);
1677 in->symbol.the_bfd = abfd;
1679 /* For the normal symbols, the zero index points at the number
1680 of bytes in the string table but is to be interpreted as the
1681 null string. For the dynamic symbols, the number of bytes in
1682 the string table is stored in the __DYNAMIC structure and the
1683 zero index points at an actual string. */
1684 if (x == 0 && ! dynamic)
1685 in->symbol.name = "";
1686 else if (x < strsize)
1687 in->symbol.name = str + x;
1691 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1692 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1693 in->other = bfd_h_get_8 (abfd, ext->e_other);
1694 in->type = bfd_h_get_8 (abfd, ext->e_type);
1695 in->symbol.udata.p = NULL;
1697 if (! translate_from_native_sym_flags (abfd, in))
1701 in->symbol.flags |= BSF_DYNAMIC;
1707 /* We read the symbols into a buffer, which is discarded when this
1708 function exits. We read the strings into a buffer large enough to
1709 hold them all plus all the cached symbol entries. */
1712 NAME(aout,slurp_symbol_table) (abfd)
1715 struct external_nlist *old_external_syms;
1716 aout_symbol_type *cached;
1719 /* If there's no work to be done, don't do any */
1720 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1723 old_external_syms = obj_aout_external_syms (abfd);
1725 if (! aout_get_external_symbols (abfd))
1728 cached_size = (obj_aout_external_sym_count (abfd)
1729 * sizeof (aout_symbol_type));
1730 cached = (aout_symbol_type *) bfd_malloc (cached_size);
1731 if (cached == NULL && cached_size != 0)
1733 if (cached_size != 0)
1734 memset (cached, 0, cached_size);
1736 /* Convert from external symbol information to internal. */
1737 if (! (NAME(aout,translate_symbol_table)
1739 obj_aout_external_syms (abfd),
1740 obj_aout_external_sym_count (abfd),
1741 obj_aout_external_strings (abfd),
1742 obj_aout_external_string_size (abfd),
1749 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1751 obj_aout_symbols (abfd) = cached;
1753 /* It is very likely that anybody who calls this function will not
1754 want the external symbol information, so if it was allocated
1755 because of our call to aout_get_external_symbols, we free it up
1756 right away to save space. */
1757 if (old_external_syms == (struct external_nlist *) NULL
1758 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1761 bfd_free_window (&obj_aout_sym_window (abfd));
1763 free (obj_aout_external_syms (abfd));
1765 obj_aout_external_syms (abfd) = NULL;
1771 /* We use a hash table when writing out symbols so that we only write
1772 out a particular string once. This helps particularly when the
1773 linker writes out stabs debugging entries, because each different
1774 contributing object file tends to have many duplicate stabs
1777 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1778 if BFD_TRADITIONAL_FORMAT is set. */
1780 static bfd_size_type add_to_stringtab
1781 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean));
1782 static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *));
1784 /* Get the index of a string in a strtab, adding it if it is not
1787 static INLINE bfd_size_type
1788 add_to_stringtab (abfd, tab, str, copy)
1790 struct bfd_strtab_hash *tab;
1795 bfd_size_type index;
1797 /* An index of 0 always means the empty string. */
1798 if (str == 0 || *str == '\0')
1801 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1802 doesn't understand a hashed string table. */
1804 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1807 index = _bfd_stringtab_add (tab, str, hash, copy);
1809 if (index != (bfd_size_type) -1)
1811 /* Add BYTES_IN_WORD to the return value to account for the
1812 space taken up by the string table size. */
1813 index += BYTES_IN_WORD;
1819 /* Write out a strtab. ABFD is already at the right location in the
1823 emit_stringtab (abfd, tab)
1825 struct bfd_strtab_hash *tab;
1827 bfd_byte buffer[BYTES_IN_WORD];
1829 /* The string table starts with the size. */
1830 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1831 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1834 return _bfd_stringtab_emit (abfd, tab);
1838 NAME(aout,write_syms) (abfd)
1841 unsigned int count ;
1842 asymbol **generic = bfd_get_outsymbols (abfd);
1843 struct bfd_strtab_hash *strtab;
1845 strtab = _bfd_stringtab_init ();
1849 for (count = 0; count < bfd_get_symcount (abfd); count++)
1851 asymbol *g = generic[count];
1853 struct external_nlist nsp;
1855 indx = add_to_stringtab (abfd, strtab, g->name, false);
1856 if (indx == (bfd_size_type) -1)
1858 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1860 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
1862 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
1863 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
1864 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
1868 bfd_h_put_16(abfd,0, nsp.e_desc);
1869 bfd_h_put_8(abfd, 0, nsp.e_other);
1870 bfd_h_put_8(abfd, 0, nsp.e_type);
1873 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1876 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
1877 != EXTERNAL_NLIST_SIZE)
1880 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1881 here, at the end. */
1885 if (! emit_stringtab (abfd, strtab))
1888 _bfd_stringtab_free (strtab);
1893 _bfd_stringtab_free (strtab);
1899 NAME(aout,get_symtab) (abfd, location)
1903 unsigned int counter = 0;
1904 aout_symbol_type *symbase;
1906 if (!NAME(aout,slurp_symbol_table)(abfd))
1909 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
1910 *(location++) = (asymbol *)( symbase++);
1912 return bfd_get_symcount (abfd);
1916 /* Standard reloc stuff */
1917 /* Output standard relocation information to a file in target byte order. */
1920 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
1923 struct reloc_std_external *natptr;
1926 asymbol *sym = *(g->sym_ptr_ptr);
1928 unsigned int r_length;
1930 int r_baserel, r_jmptable, r_relative;
1931 asection *output_section = sym->section->output_section;
1933 PUT_WORD(abfd, g->address, natptr->r_address);
1935 r_length = g->howto->size ; /* Size as a power of two */
1936 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1937 /* XXX This relies on relocs coming from a.out files. */
1938 r_baserel = (g->howto->type & 8) != 0;
1939 r_jmptable = (g->howto->type & 16) != 0;
1940 r_relative = (g->howto->type & 32) != 0;
1943 /* For a standard reloc, the addend is in the object file. */
1944 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
1947 /* name was clobbered by aout_write_syms to be symbol index */
1949 /* If this relocation is relative to a symbol then set the
1950 r_index to the symbols index, and the r_extern bit.
1952 Absolute symbols can come in in two ways, either as an offset
1953 from the abs section, or as a symbol which has an abs value.
1958 if (bfd_is_com_section (output_section)
1959 || bfd_is_abs_section (output_section)
1960 || bfd_is_und_section (output_section))
1962 if (bfd_abs_section_ptr->symbol == sym)
1964 /* Whoops, looked like an abs symbol, but is really an offset
1965 from the abs section */
1971 /* Fill in symbol */
1973 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1979 /* Just an ordinary section */
1981 r_index = output_section->target_index;
1984 /* now the fun stuff */
1985 if (bfd_header_big_endian (abfd)) {
1986 natptr->r_index[0] = r_index >> 16;
1987 natptr->r_index[1] = r_index >> 8;
1988 natptr->r_index[2] = r_index;
1990 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
1991 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
1992 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
1993 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
1994 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
1995 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
1997 natptr->r_index[2] = r_index >> 16;
1998 natptr->r_index[1] = r_index >> 8;
1999 natptr->r_index[0] = r_index;
2001 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
2002 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
2003 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
2004 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
2005 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2006 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2011 /* Extended stuff */
2012 /* Output extended relocation information to a file in target byte order. */
2015 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2018 register struct reloc_ext_external *natptr;
2022 unsigned int r_type;
2023 unsigned int r_addend;
2024 asymbol *sym = *(g->sym_ptr_ptr);
2025 asection *output_section = sym->section->output_section;
2027 PUT_WORD (abfd, g->address, natptr->r_address);
2029 r_type = (unsigned int) g->howto->type;
2031 r_addend = g->addend;
2032 if ((sym->flags & BSF_SECTION_SYM) != 0)
2033 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2035 /* If this relocation is relative to a symbol then set the
2036 r_index to the symbols index, and the r_extern bit.
2038 Absolute symbols can come in in two ways, either as an offset
2039 from the abs section, or as a symbol which has an abs value.
2040 check for that here. */
2042 if (bfd_is_abs_section (bfd_get_section (sym)))
2047 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2049 if (bfd_is_und_section (bfd_get_section (sym))
2050 || (sym->flags & BSF_GLOBAL) != 0)
2054 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2058 /* Just an ordinary section */
2060 r_index = output_section->target_index;
2063 /* now the fun stuff */
2064 if (bfd_header_big_endian (abfd)) {
2065 natptr->r_index[0] = r_index >> 16;
2066 natptr->r_index[1] = r_index >> 8;
2067 natptr->r_index[2] = r_index;
2069 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2070 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2072 natptr->r_index[2] = r_index >> 16;
2073 natptr->r_index[1] = r_index >> 8;
2074 natptr->r_index[0] = r_index;
2076 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2077 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2080 PUT_WORD (abfd, r_addend, natptr->r_addend);
2083 /* BFD deals internally with all things based from the section they're
2084 in. so, something in 10 bytes into a text section with a base of
2085 50 would have a symbol (.text+10) and know .text vma was 50.
2087 Aout keeps all it's symbols based from zero, so the symbol would
2088 contain 60. This macro subs the base of each section from the value
2089 to give the true offset from the section */
2092 #define MOVE_ADDRESS(ad) \
2094 /* undefined symbol */ \
2095 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2096 cache_ptr->addend = ad; \
2098 /* defined, section relative. replace symbol with pointer to \
2099 symbol which points to section */ \
2100 switch (r_index) { \
2102 case N_TEXT | N_EXT: \
2103 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2104 cache_ptr->addend = ad - su->textsec->vma; \
2107 case N_DATA | N_EXT: \
2108 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2109 cache_ptr->addend = ad - su->datasec->vma; \
2112 case N_BSS | N_EXT: \
2113 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2114 cache_ptr->addend = ad - su->bsssec->vma; \
2118 case N_ABS | N_EXT: \
2119 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2120 cache_ptr->addend = ad; \
2126 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2128 struct reloc_ext_external *bytes;
2131 bfd_size_type symcount;
2133 unsigned int r_index;
2135 unsigned int r_type;
2136 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2138 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2140 /* now the fun stuff */
2141 if (bfd_header_big_endian (abfd)) {
2142 r_index = (bytes->r_index[0] << 16)
2143 | (bytes->r_index[1] << 8)
2144 | bytes->r_index[2];
2145 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2146 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2147 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2149 r_index = (bytes->r_index[2] << 16)
2150 | (bytes->r_index[1] << 8)
2151 | bytes->r_index[0];
2152 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2153 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2154 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2157 cache_ptr->howto = howto_table_ext + r_type;
2159 /* Base relative relocs are always against the symbol table,
2160 regardless of the setting of r_extern. r_extern just reflects
2161 whether the symbol the reloc is against is local or global. */
2162 if (r_type == RELOC_BASE10
2163 || r_type == RELOC_BASE13
2164 || r_type == RELOC_BASE22)
2167 if (r_extern && r_index > symcount)
2169 /* We could arrange to return an error, but it might be useful
2170 to see the file even if it is bad. */
2175 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2179 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2181 struct reloc_std_external *bytes;
2184 bfd_size_type symcount;
2186 unsigned int r_index;
2188 unsigned int r_length;
2190 int r_baserel, r_jmptable, r_relative;
2191 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2192 unsigned int howto_idx;
2194 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2196 /* now the fun stuff */
2197 if (bfd_header_big_endian (abfd)) {
2198 r_index = (bytes->r_index[0] << 16)
2199 | (bytes->r_index[1] << 8)
2200 | bytes->r_index[2];
2201 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2202 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2203 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2204 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2205 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2206 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2207 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2209 r_index = (bytes->r_index[2] << 16)
2210 | (bytes->r_index[1] << 8)
2211 | bytes->r_index[0];
2212 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2213 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2214 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2215 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2216 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2217 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2218 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2221 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2222 + 16 * r_jmptable + 32 * r_relative;
2223 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2224 cache_ptr->howto = howto_table_std + howto_idx;
2225 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2227 /* Base relative relocs are always against the symbol table,
2228 regardless of the setting of r_extern. r_extern just reflects
2229 whether the symbol the reloc is against is local or global. */
2233 if (r_extern && r_index > symcount)
2235 /* We could arrange to return an error, but it might be useful
2236 to see the file even if it is bad. */
2244 /* Read and swap the relocs for a section. */
2247 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2253 bfd_size_type reloc_size;
2255 arelent *reloc_cache;
2257 unsigned int counter = 0;
2260 if (asect->relocation)
2263 if (asect->flags & SEC_CONSTRUCTOR)
2266 if (asect == obj_datasec (abfd))
2267 reloc_size = exec_hdr(abfd)->a_drsize;
2268 else if (asect == obj_textsec (abfd))
2269 reloc_size = exec_hdr(abfd)->a_trsize;
2270 else if (asect == obj_bsssec (abfd))
2274 bfd_set_error (bfd_error_invalid_operation);
2278 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2281 each_size = obj_reloc_entry_size (abfd);
2283 count = reloc_size / each_size;
2285 reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent)));
2286 if (reloc_cache == NULL && count != 0)
2288 memset (reloc_cache, 0, count * sizeof (arelent));
2290 relocs = bfd_malloc ((size_t) reloc_size);
2291 if (relocs == NULL && reloc_size != 0)
2297 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2304 cache_ptr = reloc_cache;
2305 if (each_size == RELOC_EXT_SIZE)
2307 register struct reloc_ext_external *rptr =
2308 (struct reloc_ext_external *) relocs;
2310 for (; counter < count; counter++, rptr++, cache_ptr++)
2311 NAME(aout,swap_ext_reloc_in) (abfd, rptr, cache_ptr, symbols,
2312 bfd_get_symcount (abfd));
2316 register struct reloc_std_external *rptr =
2317 (struct reloc_std_external *) relocs;
2319 for (; counter < count; counter++, rptr++, cache_ptr++)
2320 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2321 bfd_get_symcount (abfd));
2326 asect->relocation = reloc_cache;
2327 asect->reloc_count = cache_ptr - reloc_cache;
2332 /* Write out a relocation section into an object file. */
2335 NAME(aout,squirt_out_relocs) (abfd, section)
2340 unsigned char *native, *natptr;
2343 unsigned int count = section->reloc_count;
2346 if (count == 0) return true;
2348 each_size = obj_reloc_entry_size (abfd);
2349 natsize = each_size * count;
2350 native = (unsigned char *) bfd_zalloc (abfd, natsize);
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 = bfd_get_stab_name (type_code);
2486 static char buf[10];
2488 if (stab_name == NULL)
2490 sprintf(buf, "(%d)", type_code);
2494 ret->stab_type = type_code;
2495 ret->stab_other = (unsigned)(aout_symbol(symbol)->other & 0xff);
2496 ret->stab_desc = (unsigned)(aout_symbol(symbol)->desc & 0xffff);
2497 ret->stab_name = stab_name;
2503 NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
2507 bfd_print_symbol_type how;
2509 FILE *file = (FILE *)afile;
2512 case bfd_print_symbol_name:
2514 fprintf(file,"%s", symbol->name);
2516 case bfd_print_symbol_more:
2517 fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff),
2518 (unsigned)(aout_symbol(symbol)->other & 0xff),
2519 (unsigned)(aout_symbol(symbol)->type));
2521 case bfd_print_symbol_all:
2523 CONST char *section_name = symbol->section->name;
2526 bfd_print_symbol_vandf((PTR)file,symbol);
2528 fprintf(file," %-5s %04x %02x %02x",
2530 (unsigned)(aout_symbol(symbol)->desc & 0xffff),
2531 (unsigned)(aout_symbol(symbol)->other & 0xff),
2532 (unsigned)(aout_symbol(symbol)->type & 0xff));
2534 fprintf(file," %s", symbol->name);
2540 /* If we don't have to allocate more than 1MB to hold the generic
2541 symbols, we use the generic minisymbol methord: it's faster, since
2542 it only translates the symbols once, not multiple times. */
2543 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2545 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2546 symbols. The minisymbol_to_symbol function translates these into
2547 BFD asymbol structures. */
2550 NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2554 unsigned int *sizep;
2558 /* We could handle the dynamic symbols here as well, but it's
2559 easier to hand them off. */
2560 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2563 if (! aout_get_external_symbols (abfd))
2566 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2567 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2569 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2571 /* By passing the external symbols back from this routine, we are
2572 giving up control over the memory block. Clear
2573 obj_aout_external_syms, so that we do not try to free it
2575 obj_aout_external_syms (abfd) = NULL;
2577 *sizep = EXTERNAL_NLIST_SIZE;
2578 return obj_aout_external_sym_count (abfd);
2581 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2582 unmodified a.out symbol. The SYM argument is a structure returned
2583 by bfd_make_empty_symbol, which we fill in here. */
2586 NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2593 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2594 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2596 memset (sym, 0, sizeof (aout_symbol_type));
2598 /* We call translate_symbol_table to translate a single symbol. */
2599 if (! (NAME(aout,translate_symbol_table)
2601 (aout_symbol_type *) sym,
2602 (struct external_nlist *) minisym,
2604 obj_aout_external_strings (abfd),
2605 obj_aout_external_string_size (abfd),
2613 provided a BFD, a section and an offset into the section, calculate
2614 and return the name of the source file and the line nearest to the
2619 NAME(aout,find_nearest_line)
2620 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2625 CONST char **filename_ptr;
2626 CONST char **functionname_ptr;
2627 unsigned int *line_ptr;
2629 /* Run down the file looking for the filename, function and linenumber */
2631 CONST char *directory_name = NULL;
2632 CONST char *main_file_name = NULL;
2633 CONST char *current_file_name = NULL;
2634 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2635 bfd_vma low_line_vma = 0;
2636 bfd_vma low_func_vma = 0;
2638 size_t filelen, funclen;
2641 *filename_ptr = abfd->filename;
2642 *functionname_ptr = 0;
2644 if (symbols != (asymbol **)NULL) {
2645 for (p = symbols; *p; p++) {
2646 aout_symbol_type *q = (aout_symbol_type *)(*p);
2650 main_file_name = current_file_name = q->symbol.name;
2651 /* Look ahead to next symbol to check if that too is an N_SO. */
2655 q = (aout_symbol_type *)(*p);
2656 if (q->type != (int)N_SO)
2659 /* Found a second N_SO First is directory; second is filename. */
2660 directory_name = current_file_name;
2661 main_file_name = current_file_name = q->symbol.name;
2662 if (obj_textsec(abfd) != section)
2666 current_file_name = q->symbol.name;
2673 /* We'll keep this if it resolves nearer than the one we have
2675 if (q->symbol.value >= low_line_vma
2676 && q->symbol.value <= offset)
2678 *line_ptr = q->desc;
2679 low_line_vma = q->symbol.value;
2680 line_file_name = current_file_name;
2685 /* We'll keep this if it is nearer than the one we have already */
2686 if (q->symbol.value >= low_func_vma &&
2687 q->symbol.value <= offset) {
2688 low_func_vma = q->symbol.value;
2689 func = (asymbol *)q;
2691 else if (q->symbol.value > offset)
2701 main_file_name = line_file_name;
2703 if (main_file_name == NULL
2704 || main_file_name[0] == '/'
2705 || directory_name == NULL)
2708 filelen = strlen (directory_name) + strlen (main_file_name);
2712 funclen = strlen (bfd_asymbol_name (func));
2714 if (adata (abfd).line_buf != NULL)
2715 free (adata (abfd).line_buf);
2716 if (filelen + funclen == 0)
2717 adata (abfd).line_buf = buf = NULL;
2720 buf = (char *) bfd_malloc (filelen + funclen + 2);
2721 adata (abfd).line_buf = buf;
2726 if (main_file_name != NULL)
2728 if (main_file_name[0] == '/' || directory_name == NULL)
2729 *filename_ptr = main_file_name;
2732 sprintf (buf, "%s%s", directory_name, main_file_name);
2733 *filename_ptr = buf;
2740 const char *function = func->name;
2743 /* The caller expects a symbol name. We actually have a
2744 function name, without the leading underscore. Put the
2745 underscore back in, so that the caller gets a symbol name. */
2746 if (bfd_get_symbol_leading_char (abfd) == '\0')
2747 strcpy (buf, function);
2750 buf[0] = bfd_get_symbol_leading_char (abfd);
2751 strcpy (buf + 1, function);
2753 /* Have to remove : stuff */
2754 p = strchr (buf, ':');
2757 *functionname_ptr = buf;
2765 NAME(aout,sizeof_headers) (abfd, execable)
2769 return adata(abfd).exec_bytes_size;
2772 /* Free all information we have cached for this BFD. We can always
2773 read it again later if we need it. */
2776 NAME(aout,bfd_free_cached_info) (abfd)
2781 if (bfd_get_format (abfd) != bfd_object)
2784 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2785 BFCI_FREE (obj_aout_symbols (abfd));
2787 obj_aout_external_syms (abfd) = 0;
2788 bfd_free_window (&obj_aout_sym_window (abfd));
2789 bfd_free_window (&obj_aout_string_window (abfd));
2790 obj_aout_external_strings (abfd) = 0;
2792 BFCI_FREE (obj_aout_external_syms (abfd));
2793 BFCI_FREE (obj_aout_external_strings (abfd));
2795 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2796 BFCI_FREE (o->relocation);
2802 /* a.out link code. */
2804 static boolean aout_link_add_object_symbols
2805 PARAMS ((bfd *, struct bfd_link_info *));
2806 static boolean aout_link_check_archive_element
2807 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2808 static boolean aout_link_free_symbols PARAMS ((bfd *));
2809 static boolean aout_link_check_ar_symbols
2810 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2811 static boolean aout_link_add_symbols
2812 PARAMS ((bfd *, struct bfd_link_info *));
2814 /* Routine to create an entry in an a.out link hash table. */
2816 struct bfd_hash_entry *
2817 NAME(aout,link_hash_newfunc) (entry, table, string)
2818 struct bfd_hash_entry *entry;
2819 struct bfd_hash_table *table;
2822 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2824 /* Allocate the structure if it has not already been allocated by a
2826 if (ret == (struct aout_link_hash_entry *) NULL)
2827 ret = ((struct aout_link_hash_entry *)
2828 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2829 if (ret == (struct aout_link_hash_entry *) NULL)
2830 return (struct bfd_hash_entry *) ret;
2832 /* Call the allocation method of the superclass. */
2833 ret = ((struct aout_link_hash_entry *)
2834 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2838 /* Set local fields. */
2839 ret->written = false;
2843 return (struct bfd_hash_entry *) ret;
2846 /* Initialize an a.out link hash table. */
2849 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2850 struct aout_link_hash_table *table;
2852 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2853 struct bfd_hash_table *,
2856 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2859 /* Create an a.out link hash table. */
2861 struct bfd_link_hash_table *
2862 NAME(aout,link_hash_table_create) (abfd)
2865 struct aout_link_hash_table *ret;
2867 ret = ((struct aout_link_hash_table *)
2868 bfd_alloc (abfd, sizeof (struct aout_link_hash_table)));
2870 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)
2961 bfd_free_window (&obj_aout_sym_window (abfd));
2963 free ((PTR) obj_aout_external_syms (abfd));
2965 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
2967 if (obj_aout_external_strings (abfd) != (char *) NULL)
2970 bfd_free_window (&obj_aout_string_window (abfd));
2972 free ((PTR) obj_aout_external_strings (abfd));
2974 obj_aout_external_strings (abfd) = (char *) NULL;
2979 /* Look through the internal symbols to see if this object file should
2980 be included in the link. We should include this object file if it
2981 defines any symbols which are currently undefined. If this object
2982 file defines a common symbol, then we may adjust the size of the
2983 known symbol but we do not include the object file in the link
2984 (unless there is some other reason to include it). */
2987 aout_link_check_ar_symbols (abfd, info, pneeded)
2989 struct bfd_link_info *info;
2992 register struct external_nlist *p;
2993 struct external_nlist *pend;
2998 /* Look through all the symbols. */
2999 p = obj_aout_external_syms (abfd);
3000 pend = p + obj_aout_external_sym_count (abfd);
3001 strings = obj_aout_external_strings (abfd);
3002 for (; p < pend; p++)
3004 int type = bfd_h_get_8 (abfd, p->e_type);
3006 struct bfd_link_hash_entry *h;
3008 /* Ignore symbols that are not externally visible. This is an
3009 optimization only, as we check the type more thoroughly
3011 if (((type & N_EXT) == 0
3012 || (type & N_STAB) != 0
3019 if (type == N_WARNING
3025 name = strings + GET_WORD (abfd, p->e_strx);
3026 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3028 /* We are only interested in symbols that are currently
3029 undefined or common. */
3030 if (h == (struct bfd_link_hash_entry *) NULL
3031 || (h->type != bfd_link_hash_undefined
3032 && h->type != bfd_link_hash_common))
3034 if (type == (N_INDR | N_EXT))
3039 if (type == (N_TEXT | N_EXT)
3040 || type == (N_DATA | N_EXT)
3041 || type == (N_BSS | N_EXT)
3042 || type == (N_ABS | N_EXT)
3043 || type == (N_INDR | N_EXT))
3045 /* This object file defines this symbol. We must link it
3046 in. This is true regardless of whether the current
3047 definition of the symbol is undefined or common. If the
3048 current definition is common, we have a case in which we
3049 have already seen an object file including
3051 and this object file from the archive includes
3053 In such a case we must include this object file.
3055 FIXME: The SunOS 4.1.3 linker will pull in the archive
3056 element if the symbol is defined in the .data section,
3057 but not if it is defined in the .text section. That
3058 seems a bit crazy to me, and I haven't implemented it.
3059 However, it might be correct. */
3060 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3066 if (type == (N_UNDF | N_EXT))
3070 value = GET_WORD (abfd, p->e_value);
3073 /* This symbol is common in the object from the archive
3075 if (h->type == bfd_link_hash_undefined)
3080 symbfd = h->u.undef.abfd;
3081 if (symbfd == (bfd *) NULL)
3083 /* This symbol was created as undefined from
3084 outside BFD. We assume that we should link
3085 in the object file. This is done for the -u
3086 option in the linker. */
3087 if (! (*info->callbacks->add_archive_element) (info,
3094 /* Turn the current link symbol into a common
3095 symbol. It is already on the undefs list. */
3096 h->type = bfd_link_hash_common;
3097 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3098 bfd_hash_allocate (&info->hash->table,
3099 sizeof (struct bfd_link_hash_common_entry)));
3100 if (h->u.c.p == NULL)
3103 h->u.c.size = value;
3105 /* FIXME: This isn't quite right. The maximum
3106 alignment of a common symbol should be set by the
3107 architecture of the output file, not of the input
3109 power = bfd_log2 (value);
3110 if (power > bfd_get_arch_info (abfd)->section_align_power)
3111 power = bfd_get_arch_info (abfd)->section_align_power;
3112 h->u.c.p->alignment_power = power;
3114 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3119 /* Adjust the size of the common symbol if
3121 if (value > h->u.c.size)
3122 h->u.c.size = value;
3132 /* This symbol is weak but defined. We must pull it in if
3133 the current link symbol is undefined, but we don't want
3134 it if the current link symbol is common. */
3135 if (h->type == bfd_link_hash_undefined)
3137 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3145 /* We do not need this object file. */
3149 /* Add all symbols from an object file to the hash table. */
3152 aout_link_add_symbols (abfd, info)
3154 struct bfd_link_info *info;
3156 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3157 const char *, flagword, asection *,
3158 bfd_vma, const char *, boolean,
3160 struct bfd_link_hash_entry **));
3161 struct external_nlist *syms;
3162 bfd_size_type sym_count;
3165 struct aout_link_hash_entry **sym_hash;
3166 register struct external_nlist *p;
3167 struct external_nlist *pend;
3169 syms = obj_aout_external_syms (abfd);
3170 sym_count = obj_aout_external_sym_count (abfd);
3171 strings = obj_aout_external_strings (abfd);
3172 if (info->keep_memory)
3177 if ((abfd->flags & DYNAMIC) != 0
3178 && aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3180 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3181 (abfd, info, &syms, &sym_count, &strings)))
3185 /* We keep a list of the linker hash table entries that correspond
3186 to particular symbols. We could just look them up in the hash
3187 table, but keeping the list is more efficient. Perhaps this
3188 should be conditional on info->keep_memory. */
3189 sym_hash = ((struct aout_link_hash_entry **)
3192 * sizeof (struct aout_link_hash_entry *))));
3193 if (sym_hash == NULL && sym_count != 0)
3195 obj_aout_sym_hashes (abfd) = sym_hash;
3197 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3198 if (add_one_symbol == NULL)
3199 add_one_symbol = _bfd_generic_link_add_one_symbol;
3202 pend = p + sym_count;
3203 for (; p < pend; p++, sym_hash++)
3214 type = bfd_h_get_8 (abfd, p->e_type);
3216 /* Ignore debugging symbols. */
3217 if ((type & N_STAB) != 0)
3220 name = strings + GET_WORD (abfd, p->e_strx);
3221 value = GET_WORD (abfd, p->e_value);
3238 /* Ignore symbols that are not externally visible. */
3241 /* Ignore local indirect symbol. */
3246 case N_UNDF | N_EXT:
3249 section = bfd_und_section_ptr;
3253 section = bfd_com_section_ptr;
3256 section = bfd_abs_section_ptr;
3258 case N_TEXT | N_EXT:
3259 section = obj_textsec (abfd);
3260 value -= bfd_get_section_vma (abfd, section);
3262 case N_DATA | N_EXT:
3263 case N_SETV | N_EXT:
3264 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3265 translate_from_native_sym_flags. */
3266 section = obj_datasec (abfd);
3267 value -= bfd_get_section_vma (abfd, section);
3270 section = obj_bsssec (abfd);
3271 value -= bfd_get_section_vma (abfd, section);
3273 case N_INDR | N_EXT:
3274 /* An indirect symbol. The next symbol is the symbol
3275 which this one really is. */
3276 BFD_ASSERT (p + 1 < pend);
3278 string = strings + GET_WORD (abfd, p->e_strx);
3279 section = bfd_ind_section_ptr;
3280 flags |= BSF_INDIRECT;
3282 case N_COMM | N_EXT:
3283 section = bfd_com_section_ptr;
3285 case N_SETA: case N_SETA | N_EXT:
3286 section = bfd_abs_section_ptr;
3287 flags |= BSF_CONSTRUCTOR;
3289 case N_SETT: case N_SETT | N_EXT:
3290 section = obj_textsec (abfd);
3291 flags |= BSF_CONSTRUCTOR;
3292 value -= bfd_get_section_vma (abfd, section);
3294 case N_SETD: case N_SETD | N_EXT:
3295 section = obj_datasec (abfd);
3296 flags |= BSF_CONSTRUCTOR;
3297 value -= bfd_get_section_vma (abfd, section);
3299 case N_SETB: case N_SETB | N_EXT:
3300 section = obj_bsssec (abfd);
3301 flags |= BSF_CONSTRUCTOR;
3302 value -= bfd_get_section_vma (abfd, section);
3305 /* A warning symbol. The next symbol is the one to warn
3307 BFD_ASSERT (p + 1 < pend);
3310 name = strings + GET_WORD (abfd, p->e_strx);
3311 section = bfd_und_section_ptr;
3312 flags |= BSF_WARNING;
3315 section = bfd_und_section_ptr;
3319 section = bfd_abs_section_ptr;
3323 section = obj_textsec (abfd);
3324 value -= bfd_get_section_vma (abfd, section);
3328 section = obj_datasec (abfd);
3329 value -= bfd_get_section_vma (abfd, section);
3333 section = obj_bsssec (abfd);
3334 value -= bfd_get_section_vma (abfd, section);
3339 if (! ((*add_one_symbol)
3340 (info, abfd, name, flags, section, value, string, copy, false,
3341 (struct bfd_link_hash_entry **) sym_hash)))
3344 /* Restrict the maximum alignment of a common symbol based on
3345 the architecture, since a.out has no way to represent
3346 alignment requirements of a section in a .o file. FIXME:
3347 This isn't quite right: it should use the architecture of the
3348 output file, not the input files. */
3349 if ((*sym_hash)->root.type == bfd_link_hash_common
3350 && ((*sym_hash)->root.u.c.p->alignment_power >
3351 bfd_get_arch_info (abfd)->section_align_power))
3352 (*sym_hash)->root.u.c.p->alignment_power =
3353 bfd_get_arch_info (abfd)->section_align_power;
3355 /* If this is a set symbol, and we are not building sets, then
3356 it is possible for the hash entry to not have been set. In
3357 such a case, treat the symbol as not globally defined. */
3358 if ((*sym_hash)->root.type == bfd_link_hash_new)
3360 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3364 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3371 /* A hash table used for header files with N_BINCL entries. */
3373 struct aout_link_includes_table
3375 struct bfd_hash_table root;
3378 /* A linked list of totals that we have found for a particular header
3381 struct aout_link_includes_totals
3383 struct aout_link_includes_totals *next;
3387 /* An entry in the header file hash table. */
3389 struct aout_link_includes_entry
3391 struct bfd_hash_entry root;
3392 /* List of totals we have found for this file. */
3393 struct aout_link_includes_totals *totals;
3396 /* Look up an entry in an the header file hash table. */
3398 #define aout_link_includes_lookup(table, string, create, copy) \
3399 ((struct aout_link_includes_entry *) \
3400 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3402 /* During the final link step we need to pass around a bunch of
3403 information, so we do it in an instance of this structure. */
3405 struct aout_final_link_info
3407 /* General link information. */
3408 struct bfd_link_info *info;
3411 /* Reloc file positions. */
3412 file_ptr treloff, dreloff;
3413 /* File position of symbols. */
3416 struct bfd_strtab_hash *strtab;
3417 /* Header file hash table. */
3418 struct aout_link_includes_table includes;
3419 /* A buffer large enough to hold the contents of any section. */
3421 /* A buffer large enough to hold the relocs of any section. */
3423 /* A buffer large enough to hold the symbol map of any input BFD. */
3425 /* A buffer large enough to hold output symbols of any input BFD. */
3426 struct external_nlist *output_syms;
3429 static struct bfd_hash_entry *aout_link_includes_newfunc
3430 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
3431 static boolean aout_link_input_bfd
3432 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3433 static boolean aout_link_write_symbols
3434 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3435 static boolean aout_link_write_other_symbol
3436 PARAMS ((struct aout_link_hash_entry *, PTR));
3437 static boolean aout_link_input_section
3438 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3439 asection *input_section, file_ptr *reloff_ptr,
3440 bfd_size_type rel_size));
3441 static boolean aout_link_input_section_std
3442 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3443 asection *input_section, struct reloc_std_external *,
3444 bfd_size_type rel_size, bfd_byte *contents));
3445 static boolean aout_link_input_section_ext
3446 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3447 asection *input_section, struct reloc_ext_external *,
3448 bfd_size_type rel_size, bfd_byte *contents));
3449 static INLINE asection *aout_reloc_index_to_section
3450 PARAMS ((bfd *, int));
3451 static boolean aout_link_reloc_link_order
3452 PARAMS ((struct aout_final_link_info *, asection *,
3453 struct bfd_link_order *));
3455 /* The function to create a new entry in the header file hash table. */
3457 static struct bfd_hash_entry *
3458 aout_link_includes_newfunc (entry, table, string)
3459 struct bfd_hash_entry *entry;
3460 struct bfd_hash_table *table;
3463 struct aout_link_includes_entry *ret =
3464 (struct aout_link_includes_entry *) entry;
3466 /* Allocate the structure if it has not already been allocated by a
3468 if (ret == (struct aout_link_includes_entry *) NULL)
3469 ret = ((struct aout_link_includes_entry *)
3470 bfd_hash_allocate (table,
3471 sizeof (struct aout_link_includes_entry)));
3472 if (ret == (struct aout_link_includes_entry *) NULL)
3473 return (struct bfd_hash_entry *) ret;
3475 /* Call the allocation method of the superclass. */
3476 ret = ((struct aout_link_includes_entry *)
3477 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3480 /* Set local fields. */
3484 return (struct bfd_hash_entry *) ret;
3487 /* Do the final link step. This is called on the output BFD. The
3488 INFO structure should point to a list of BFDs linked through the
3489 link_next field which can be used to find each BFD which takes part
3490 in the output. Also, each section in ABFD should point to a list
3491 of bfd_link_order structures which list all the input sections for
3492 the output section. */
3495 NAME(aout,final_link) (abfd, info, callback)
3497 struct bfd_link_info *info;
3498 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3500 struct aout_final_link_info aout_info;
3501 boolean includes_hash_initialized = false;
3503 bfd_size_type trsize, drsize;
3504 size_t max_contents_size;
3505 size_t max_relocs_size;
3506 size_t max_sym_count;
3507 bfd_size_type text_size;
3509 register struct bfd_link_order *p;
3511 boolean have_link_order_relocs;
3514 abfd->flags |= DYNAMIC;
3516 aout_info.info = info;
3517 aout_info.output_bfd = abfd;
3518 aout_info.contents = NULL;
3519 aout_info.relocs = NULL;
3520 aout_info.symbol_map = NULL;
3521 aout_info.output_syms = NULL;
3523 if (! bfd_hash_table_init_n (&aout_info.includes.root,
3524 aout_link_includes_newfunc,
3527 includes_hash_initialized = true;
3529 /* Figure out the largest section size. Also, if generating
3530 relocateable output, count the relocs. */
3533 max_contents_size = 0;
3534 max_relocs_size = 0;
3536 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3540 if (info->relocateable)
3542 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3544 trsize += exec_hdr (sub)->a_trsize;
3545 drsize += exec_hdr (sub)->a_drsize;
3549 /* FIXME: We need to identify the .text and .data sections
3550 and call get_reloc_upper_bound and canonicalize_reloc to
3551 work out the number of relocs needed, and then multiply
3552 by the reloc size. */
3553 (*_bfd_error_handler)
3554 ("%s: relocateable link from %s to %s not supported",
3555 bfd_get_filename (abfd),
3556 sub->xvec->name, abfd->xvec->name);
3557 bfd_set_error (bfd_error_invalid_operation);
3562 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3564 sz = bfd_section_size (sub, obj_textsec (sub));
3565 if (sz > max_contents_size)
3566 max_contents_size = sz;
3567 sz = bfd_section_size (sub, obj_datasec (sub));
3568 if (sz > max_contents_size)
3569 max_contents_size = sz;
3571 sz = exec_hdr (sub)->a_trsize;
3572 if (sz > max_relocs_size)
3573 max_relocs_size = sz;
3574 sz = exec_hdr (sub)->a_drsize;
3575 if (sz > max_relocs_size)
3576 max_relocs_size = sz;
3578 sz = obj_aout_external_sym_count (sub);
3579 if (sz > max_sym_count)
3584 if (info->relocateable)
3586 if (obj_textsec (abfd) != (asection *) NULL)
3587 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3589 * obj_reloc_entry_size (abfd));
3590 if (obj_datasec (abfd) != (asection *) NULL)
3591 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3593 * obj_reloc_entry_size (abfd));
3596 exec_hdr (abfd)->a_trsize = trsize;
3597 exec_hdr (abfd)->a_drsize = drsize;
3599 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3601 /* Adjust the section sizes and vmas according to the magic number.
3602 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3603 filepos for each section. */
3604 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3607 /* The relocation and symbol file positions differ among a.out
3608 targets. We are passed a callback routine from the backend
3609 specific code to handle this.
3610 FIXME: At this point we do not know how much space the symbol
3611 table will require. This will not work for any (nonstandard)
3612 a.out target that needs to know the symbol table size before it
3613 can compute the relocation file positions. This may or may not
3614 be the case for the hp300hpux target, for example. */
3615 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3617 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3618 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3619 obj_sym_filepos (abfd) = aout_info.symoff;
3621 /* We keep a count of the symbols as we output them. */
3622 obj_aout_external_sym_count (abfd) = 0;
3624 /* We accumulate the string table as we write out the symbols. */
3625 aout_info.strtab = _bfd_stringtab_init ();
3626 if (aout_info.strtab == NULL)
3629 /* Allocate buffers to hold section contents and relocs. */
3630 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3631 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3632 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3633 aout_info.output_syms = ((struct external_nlist *)
3634 bfd_malloc ((max_sym_count + 1)
3635 * sizeof (struct external_nlist)));
3636 if ((aout_info.contents == NULL && max_contents_size != 0)
3637 || (aout_info.relocs == NULL && max_relocs_size != 0)
3638 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3639 || aout_info.output_syms == NULL)
3642 /* If we have a symbol named __DYNAMIC, force it out now. This is
3643 required by SunOS. Doing this here rather than in sunos.c is a
3644 hack, but it's easier than exporting everything which would be
3647 struct aout_link_hash_entry *h;
3649 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3650 false, false, false);
3652 aout_link_write_other_symbol (h, &aout_info);
3655 /* The most time efficient way to do the link would be to read all
3656 the input object files into memory and then sort out the
3657 information into the output file. Unfortunately, that will
3658 probably use too much memory. Another method would be to step
3659 through everything that composes the text section and write it
3660 out, and then everything that composes the data section and write
3661 it out, and then write out the relocs, and then write out the
3662 symbols. Unfortunately, that requires reading stuff from each
3663 input file several times, and we will not be able to keep all the
3664 input files open simultaneously, and reopening them will be slow.
3666 What we do is basically process one input file at a time. We do
3667 everything we need to do with an input file once--copy over the
3668 section contents, handle the relocation information, and write
3669 out the symbols--and then we throw away the information we read
3670 from it. This approach requires a lot of lseeks of the output
3671 file, which is unfortunate but still faster than reopening a lot
3674 We use the output_has_begun field of the input BFDs to see
3675 whether we have already handled it. */
3676 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3677 sub->output_has_begun = false;
3679 have_link_order_relocs = false;
3680 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3682 for (p = o->link_order_head;
3683 p != (struct bfd_link_order *) NULL;
3686 if (p->type == bfd_indirect_link_order
3687 && (bfd_get_flavour (p->u.indirect.section->owner)
3688 == bfd_target_aout_flavour))
3692 input_bfd = p->u.indirect.section->owner;
3693 if (! input_bfd->output_has_begun)
3695 if (! aout_link_input_bfd (&aout_info, input_bfd))
3697 input_bfd->output_has_begun = true;
3700 else if (p->type == bfd_section_reloc_link_order
3701 || p->type == bfd_symbol_reloc_link_order)
3703 /* These are handled below. */
3704 have_link_order_relocs = true;
3708 if (! _bfd_default_link_order (abfd, info, o, p))
3714 /* Write out any symbols that we have not already written out. */
3715 aout_link_hash_traverse (aout_hash_table (info),
3716 aout_link_write_other_symbol,
3719 /* Now handle any relocs we were asked to create by the linker.
3720 These did not come from any input file. We must do these after
3721 we have written out all the symbols, so that we know the symbol
3723 if (have_link_order_relocs)
3725 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3727 for (p = o->link_order_head;
3728 p != (struct bfd_link_order *) NULL;
3731 if (p->type == bfd_section_reloc_link_order
3732 || p->type == bfd_symbol_reloc_link_order)
3734 if (! aout_link_reloc_link_order (&aout_info, o, p))
3741 if (aout_info.contents != NULL)
3743 free (aout_info.contents);
3744 aout_info.contents = NULL;
3746 if (aout_info.relocs != NULL)
3748 free (aout_info.relocs);
3749 aout_info.relocs = NULL;
3751 if (aout_info.symbol_map != NULL)
3753 free (aout_info.symbol_map);
3754 aout_info.symbol_map = NULL;
3756 if (aout_info.output_syms != NULL)
3758 free (aout_info.output_syms);
3759 aout_info.output_syms = NULL;
3761 if (includes_hash_initialized)
3763 bfd_hash_table_free (&aout_info.includes.root);
3764 includes_hash_initialized = false;
3767 /* Finish up any dynamic linking we may be doing. */
3768 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3770 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3774 /* Update the header information. */
3775 abfd->symcount = obj_aout_external_sym_count (abfd);
3776 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3777 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3778 obj_textsec (abfd)->reloc_count =
3779 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3780 obj_datasec (abfd)->reloc_count =
3781 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3783 /* Write out the string table. */
3784 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
3786 return emit_stringtab (abfd, aout_info.strtab);
3789 if (aout_info.contents != NULL)
3790 free (aout_info.contents);
3791 if (aout_info.relocs != NULL)
3792 free (aout_info.relocs);
3793 if (aout_info.symbol_map != NULL)
3794 free (aout_info.symbol_map);
3795 if (aout_info.output_syms != NULL)
3796 free (aout_info.output_syms);
3797 if (includes_hash_initialized)
3798 bfd_hash_table_free (&aout_info.includes.root);
3802 /* Link an a.out input BFD into the output file. */
3805 aout_link_input_bfd (finfo, input_bfd)
3806 struct aout_final_link_info *finfo;
3809 bfd_size_type sym_count;
3811 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3813 /* If this is a dynamic object, it may need special handling. */
3814 if ((input_bfd->flags & DYNAMIC) != 0
3815 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3817 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3818 (finfo->info, input_bfd));
3821 /* Get the symbols. We probably have them already, unless
3822 finfo->info->keep_memory is false. */
3823 if (! aout_get_external_symbols (input_bfd))
3826 sym_count = obj_aout_external_sym_count (input_bfd);
3828 /* Write out the symbols and get a map of the new indices. The map
3829 is placed into finfo->symbol_map. */
3830 if (! aout_link_write_symbols (finfo, input_bfd))
3833 /* Relocate and write out the sections. These functions use the
3834 symbol map created by aout_link_write_symbols. */
3835 if (! aout_link_input_section (finfo, input_bfd,
3836 obj_textsec (input_bfd),
3838 exec_hdr (input_bfd)->a_trsize)
3839 || ! aout_link_input_section (finfo, input_bfd,
3840 obj_datasec (input_bfd),
3842 exec_hdr (input_bfd)->a_drsize))
3845 /* If we are not keeping memory, we don't need the symbols any
3846 longer. We still need them if we are keeping memory, because the
3847 strings in the hash table point into them. */
3848 if (! finfo->info->keep_memory)
3850 if (! aout_link_free_symbols (input_bfd))
3857 /* Adjust and write out the symbols for an a.out file. Set the new
3858 symbol indices into a symbol_map. */
3861 aout_link_write_symbols (finfo, input_bfd)
3862 struct aout_final_link_info *finfo;
3866 bfd_size_type sym_count;
3868 enum bfd_link_strip strip;
3869 enum bfd_link_discard discard;
3870 struct external_nlist *outsym;
3871 bfd_size_type strtab_index;
3872 register struct external_nlist *sym;
3873 struct external_nlist *sym_end;
3874 struct aout_link_hash_entry **sym_hash;
3879 output_bfd = finfo->output_bfd;
3880 sym_count = obj_aout_external_sym_count (input_bfd);
3881 strings = obj_aout_external_strings (input_bfd);
3882 strip = finfo->info->strip;
3883 discard = finfo->info->discard;
3884 outsym = finfo->output_syms;
3886 /* First write out a symbol for this object file, unless we are
3887 discarding such symbols. */
3888 if (strip != strip_all
3889 && (strip != strip_some
3890 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
3891 false, false) != NULL)
3892 && discard != discard_all)
3894 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
3895 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
3896 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
3897 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
3898 input_bfd->filename, false);
3899 if (strtab_index == (bfd_size_type) -1)
3901 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
3902 PUT_WORD (output_bfd,
3903 (bfd_get_section_vma (output_bfd,
3904 obj_textsec (input_bfd)->output_section)
3905 + obj_textsec (input_bfd)->output_offset),
3907 ++obj_aout_external_sym_count (output_bfd);
3913 sym = obj_aout_external_syms (input_bfd);
3914 sym_end = sym + sym_count;
3915 sym_hash = obj_aout_sym_hashes (input_bfd);
3916 symbol_map = finfo->symbol_map;
3917 memset (symbol_map, 0, sym_count * sizeof *symbol_map);
3918 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
3922 struct aout_link_hash_entry *h;
3928 /* We set *symbol_map to 0 above for all symbols. If it has
3929 already been set to -1 for this symbol, it means that we are
3930 discarding it because it appears in a duplicate header file.
3931 See the N_BINCL code below. */
3932 if (*symbol_map == -1)
3935 /* Initialize *symbol_map to -1, which means that the symbol was
3936 not copied into the output file. We will change it later if
3937 we do copy the symbol over. */
3940 type = bfd_h_get_8 (input_bfd, sym->e_type);
3941 name = strings + GET_WORD (input_bfd, sym->e_strx);
3947 /* Pass this symbol through. It is the target of an
3948 indirect or warning symbol. */
3949 val = GET_WORD (input_bfd, sym->e_value);
3954 /* Skip this symbol, which is the target of an indirect
3955 symbol that we have changed to no longer be an indirect
3962 struct aout_link_hash_entry *hresolve;
3964 /* We have saved the hash table entry for this symbol, if
3965 there is one. Note that we could just look it up again
3966 in the hash table, provided we first check that it is an
3970 /* Use the name from the hash table, in case the symbol was
3973 name = h->root.root.string;
3975 /* If this is an indirect or warning symbol, then change
3976 hresolve to the base symbol. We also change *sym_hash so
3977 that the relocation routines relocate against the real
3980 if (h != (struct aout_link_hash_entry *) NULL
3981 && (h->root.type == bfd_link_hash_indirect
3982 || h->root.type == bfd_link_hash_warning))
3984 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
3985 while (hresolve->root.type == bfd_link_hash_indirect
3986 || hresolve->root.type == bfd_link_hash_warning)
3987 hresolve = ((struct aout_link_hash_entry *)
3988 hresolve->root.u.i.link);
3989 *sym_hash = hresolve;
3992 /* If the symbol has already been written out, skip it. */
3993 if (h != (struct aout_link_hash_entry *) NULL
3994 && h->root.type != bfd_link_hash_warning
3997 if ((type & N_TYPE) == N_INDR
3998 || type == N_WARNING)
4000 *symbol_map = h->indx;
4004 /* See if we are stripping this symbol. */
4010 case strip_debugger:
4011 if ((type & N_STAB) != 0)
4015 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
4025 if (h != (struct aout_link_hash_entry *) NULL)
4030 /* Get the value of the symbol. */
4031 if ((type & N_TYPE) == N_TEXT
4033 symsec = obj_textsec (input_bfd);
4034 else if ((type & N_TYPE) == N_DATA
4036 symsec = obj_datasec (input_bfd);
4037 else if ((type & N_TYPE) == N_BSS
4039 symsec = obj_bsssec (input_bfd);
4040 else if ((type & N_TYPE) == N_ABS
4042 symsec = bfd_abs_section_ptr;
4043 else if (((type & N_TYPE) == N_INDR
4044 && (hresolve == (struct aout_link_hash_entry *) NULL
4045 || (hresolve->root.type != bfd_link_hash_defined
4046 && hresolve->root.type != bfd_link_hash_defweak
4047 && hresolve->root.type != bfd_link_hash_common)))
4048 || type == N_WARNING)
4050 /* Pass the next symbol through unchanged. The
4051 condition above for indirect symbols is so that if
4052 the indirect symbol was defined, we output it with
4053 the correct definition so the debugger will
4056 val = GET_WORD (input_bfd, sym->e_value);
4059 else if ((type & N_STAB) != 0)
4061 val = GET_WORD (input_bfd, sym->e_value);
4066 /* If we get here with an indirect symbol, it means that
4067 we are outputting it with a real definition. In such
4068 a case we do not want to output the next symbol,
4069 which is the target of the indirection. */
4070 if ((type & N_TYPE) == N_INDR)
4075 /* We need to get the value from the hash table. We use
4076 hresolve so that if we have defined an indirect
4077 symbol we output the final definition. */
4078 if (h == (struct aout_link_hash_entry *) NULL)
4080 switch (type & N_TYPE)
4083 symsec = obj_textsec (input_bfd);
4086 symsec = obj_datasec (input_bfd);
4089 symsec = obj_bsssec (input_bfd);
4092 symsec = bfd_abs_section_ptr;
4099 else if (hresolve->root.type == bfd_link_hash_defined
4100 || hresolve->root.type == bfd_link_hash_defweak)
4102 asection *input_section;
4103 asection *output_section;
4105 /* This case usually means a common symbol which was
4106 turned into a defined symbol. */
4107 input_section = hresolve->root.u.def.section;
4108 output_section = input_section->output_section;
4109 BFD_ASSERT (bfd_is_abs_section (output_section)
4110 || output_section->owner == output_bfd);
4111 val = (hresolve->root.u.def.value
4112 + bfd_get_section_vma (output_bfd, output_section)
4113 + input_section->output_offset);
4115 /* Get the correct type based on the section. If
4116 this is a constructed set, force it to be
4117 globally visible. */
4126 if (output_section == obj_textsec (output_bfd))
4127 type |= (hresolve->root.type == bfd_link_hash_defined
4130 else if (output_section == obj_datasec (output_bfd))
4131 type |= (hresolve->root.type == bfd_link_hash_defined
4134 else if (output_section == obj_bsssec (output_bfd))
4135 type |= (hresolve->root.type == bfd_link_hash_defined
4139 type |= (hresolve->root.type == bfd_link_hash_defined
4143 else if (hresolve->root.type == bfd_link_hash_common)
4144 val = hresolve->root.u.c.size;
4145 else if (hresolve->root.type == bfd_link_hash_undefweak)
4153 if (symsec != (asection *) NULL)
4154 val = (symsec->output_section->vma
4155 + symsec->output_offset
4156 + (GET_WORD (input_bfd, sym->e_value)
4159 /* If this is a global symbol set the written flag, and if
4160 it is a local symbol see if we should discard it. */
4161 if (h != (struct aout_link_hash_entry *) NULL)
4164 h->indx = obj_aout_external_sym_count (output_bfd);
4166 else if ((type & N_TYPE) != N_SETT
4167 && (type & N_TYPE) != N_SETD
4168 && (type & N_TYPE) != N_SETB
4169 && (type & N_TYPE) != N_SETA)
4176 if (*name == *finfo->info->lprefix
4177 && (finfo->info->lprefix_len == 1
4178 || strncmp (name, finfo->info->lprefix,
4179 finfo->info->lprefix_len) == 0))
4193 /* An N_BINCL symbol indicates the start of the stabs
4194 entries for a header file. We need to scan ahead to the
4195 next N_EINCL symbol, ignoring nesting, adding up all the
4196 characters in the symbol names, not including the file
4197 numbers in types (the first number after an open
4199 if (type == N_BINCL)
4201 struct external_nlist *incl_sym;
4203 struct aout_link_includes_entry *incl_entry;
4204 struct aout_link_includes_totals *t;
4208 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
4212 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4213 if (incl_type == N_EINCL)
4219 else if (incl_type == N_BINCL)
4225 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
4226 for (; *s != '\0'; s++)
4231 /* Skip the file number. */
4233 while (isdigit ((unsigned char) *s))
4241 /* If we have already included a header file with the
4242 same value, then replace this one with an N_EXCL
4244 copy = ! finfo->info->keep_memory;
4245 incl_entry = aout_link_includes_lookup (&finfo->includes,
4247 if (incl_entry == NULL)
4249 for (t = incl_entry->totals; t != NULL; t = t->next)
4250 if (t->total == val)
4254 /* This is the first time we have seen this header
4255 file with this set of stabs strings. */
4256 t = ((struct aout_link_includes_totals *)
4257 bfd_hash_allocate (&finfo->includes.root,
4262 t->next = incl_entry->totals;
4263 incl_entry->totals = t;
4269 /* This is a duplicate header file. We must change
4270 it to be an N_EXCL entry, and mark all the
4271 included symbols to prevent outputting them. */
4275 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
4277 incl_sym++, incl_map++)
4281 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4282 if (incl_type == N_EINCL)
4291 else if (incl_type == N_BINCL)
4300 /* Copy this symbol into the list of symbols we are going to
4302 bfd_h_put_8 (output_bfd, type, outsym->e_type);
4303 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
4305 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
4308 if (! finfo->info->keep_memory)
4310 /* name points into a string table which we are going to
4311 free. If there is a hash table entry, use that string.
4312 Otherwise, copy name into memory. */
4313 if (h != (struct aout_link_hash_entry *) NULL)
4314 name = h->root.root.string;
4318 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4320 if (strtab_index == (bfd_size_type) -1)
4322 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4323 PUT_WORD (output_bfd, val, outsym->e_value);
4324 *symbol_map = obj_aout_external_sym_count (output_bfd);
4325 ++obj_aout_external_sym_count (output_bfd);
4329 /* Write out the output symbols we have just constructed. */
4330 if (outsym > finfo->output_syms)
4332 bfd_size_type outsym_count;
4334 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4336 outsym_count = outsym - finfo->output_syms;
4337 if (bfd_write ((PTR) finfo->output_syms,
4338 (bfd_size_type) EXTERNAL_NLIST_SIZE,
4339 (bfd_size_type) outsym_count, output_bfd)
4340 != outsym_count * EXTERNAL_NLIST_SIZE)
4342 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
4348 /* Write out a symbol that was not associated with an a.out input
4352 aout_link_write_other_symbol (h, data)
4353 struct aout_link_hash_entry *h;
4356 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4360 struct external_nlist outsym;
4363 output_bfd = finfo->output_bfd;
4365 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4367 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4368 (output_bfd, finfo->info, h)))
4370 /* FIXME: No way to handle errors. */
4380 /* An indx of -2 means the symbol must be written. */
4382 && (finfo->info->strip == strip_all
4383 || (finfo->info->strip == strip_some
4384 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4385 false, false) == NULL)))
4388 switch (h->root.type)
4392 /* Avoid variable not initialized warnings. */
4394 case bfd_link_hash_new:
4395 /* This can happen for set symbols when sets are not being
4398 case bfd_link_hash_undefined:
4399 type = N_UNDF | N_EXT;
4402 case bfd_link_hash_defined:
4403 case bfd_link_hash_defweak:
4407 sec = h->root.u.def.section->output_section;
4408 BFD_ASSERT (bfd_is_abs_section (sec)
4409 || sec->owner == output_bfd);
4410 if (sec == obj_textsec (output_bfd))
4411 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4412 else if (sec == obj_datasec (output_bfd))
4413 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4414 else if (sec == obj_bsssec (output_bfd))
4415 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4417 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4419 val = (h->root.u.def.value
4421 + h->root.u.def.section->output_offset);
4424 case bfd_link_hash_common:
4425 type = N_UNDF | N_EXT;
4426 val = h->root.u.c.size;
4428 case bfd_link_hash_undefweak:
4431 case bfd_link_hash_indirect:
4432 case bfd_link_hash_warning:
4433 /* FIXME: Ignore these for now. The circumstances under which
4434 they should be written out are not clear to me. */
4438 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4439 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4440 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4441 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4443 if (indx == (bfd_size_type) -1)
4445 /* FIXME: No way to handle errors. */
4448 PUT_WORD (output_bfd, indx, outsym.e_strx);
4449 PUT_WORD (output_bfd, val, outsym.e_value);
4451 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4452 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4453 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4455 /* FIXME: No way to handle errors. */
4459 finfo->symoff += EXTERNAL_NLIST_SIZE;
4460 h->indx = obj_aout_external_sym_count (output_bfd);
4461 ++obj_aout_external_sym_count (output_bfd);
4466 /* Link an a.out section into the output file. */
4469 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4471 struct aout_final_link_info *finfo;
4473 asection *input_section;
4474 file_ptr *reloff_ptr;
4475 bfd_size_type rel_size;
4477 bfd_size_type input_size;
4480 /* Get the section contents. */
4481 input_size = bfd_section_size (input_bfd, input_section);
4482 if (! bfd_get_section_contents (input_bfd, input_section,
4483 (PTR) finfo->contents,
4484 (file_ptr) 0, input_size))
4487 /* Read in the relocs if we haven't already done it. */
4488 if (aout_section_data (input_section) != NULL
4489 && aout_section_data (input_section)->relocs != NULL)
4490 relocs = aout_section_data (input_section)->relocs;
4493 relocs = finfo->relocs;
4496 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4497 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4502 /* Relocate the section contents. */
4503 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4505 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4506 (struct reloc_std_external *) relocs,
4507 rel_size, finfo->contents))
4512 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4513 (struct reloc_ext_external *) relocs,
4514 rel_size, finfo->contents))
4518 /* Write out the section contents. */
4519 if (! bfd_set_section_contents (finfo->output_bfd,
4520 input_section->output_section,
4521 (PTR) finfo->contents,
4522 input_section->output_offset,
4526 /* If we are producing relocateable output, the relocs were
4527 modified, and we now write them out. */
4528 if (finfo->info->relocateable && rel_size > 0)
4530 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4532 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4535 *reloff_ptr += rel_size;
4537 /* Assert that the relocs have not run into the symbols, and
4538 that if these are the text relocs they have not run into the
4540 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4541 && (reloff_ptr != &finfo->treloff
4543 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4549 /* Get the section corresponding to a reloc index. */
4551 static INLINE asection *
4552 aout_reloc_index_to_section (abfd, indx)
4556 switch (indx & N_TYPE)
4559 return obj_textsec (abfd);
4561 return obj_datasec (abfd);
4563 return obj_bsssec (abfd);
4566 return bfd_abs_section_ptr;
4572 /* Relocate an a.out section using standard a.out relocs. */
4575 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4577 struct aout_final_link_info *finfo;
4579 asection *input_section;
4580 struct reloc_std_external *relocs;
4581 bfd_size_type rel_size;
4584 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4586 struct aout_link_hash_entry *,
4587 PTR, bfd_byte *, boolean *,
4590 boolean relocateable;
4591 struct external_nlist *syms;
4593 struct aout_link_hash_entry **sym_hashes;
4595 bfd_size_type reloc_count;
4596 register struct reloc_std_external *rel;
4597 struct reloc_std_external *rel_end;
4599 output_bfd = finfo->output_bfd;
4600 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4602 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4603 BFD_ASSERT (input_bfd->xvec->header_byteorder
4604 == output_bfd->xvec->header_byteorder);
4606 relocateable = finfo->info->relocateable;
4607 syms = obj_aout_external_syms (input_bfd);
4608 strings = obj_aout_external_strings (input_bfd);
4609 sym_hashes = obj_aout_sym_hashes (input_bfd);
4610 symbol_map = finfo->symbol_map;
4612 reloc_count = rel_size / RELOC_STD_SIZE;
4614 rel_end = rel + reloc_count;
4615 for (; rel < rel_end; rel++)
4622 reloc_howto_type *howto;
4623 struct aout_link_hash_entry *h = NULL;
4625 bfd_reloc_status_type r;
4627 r_addr = GET_SWORD (input_bfd, rel->r_address);
4629 #ifdef MY_reloc_howto
4630 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel);
4636 unsigned int howto_idx;
4638 if (bfd_header_big_endian (input_bfd))
4640 r_index = ((rel->r_index[0] << 16)
4641 | (rel->r_index[1] << 8)
4643 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4644 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4645 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4646 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4647 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4648 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4649 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4653 r_index = ((rel->r_index[2] << 16)
4654 | (rel->r_index[1] << 8)
4656 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4657 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4658 r_baserel = (0 != (rel->r_type[0]
4659 & RELOC_STD_BITS_BASEREL_LITTLE));
4660 r_jmptable= (0 != (rel->r_type[0]
4661 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4662 r_relative= (0 != (rel->r_type[0]
4663 & RELOC_STD_BITS_RELATIVE_LITTLE));
4664 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4665 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4668 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4669 + 16 * r_jmptable + 32 * r_relative);
4670 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4671 howto = howto_table_std + howto_idx;
4677 /* We are generating a relocateable output file, and must
4678 modify the reloc accordingly. */
4681 /* If we know the symbol this relocation is against,
4682 convert it into a relocation against a section. This
4683 is what the native linker does. */
4684 h = sym_hashes[r_index];
4685 if (h != (struct aout_link_hash_entry *) NULL
4686 && (h->root.type == bfd_link_hash_defined
4687 || h->root.type == bfd_link_hash_defweak))
4689 asection *output_section;
4691 /* Change the r_extern value. */
4692 if (bfd_header_big_endian (output_bfd))
4693 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4695 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4697 /* Compute a new r_index. */
4698 output_section = h->root.u.def.section->output_section;
4699 if (output_section == obj_textsec (output_bfd))
4701 else if (output_section == obj_datasec (output_bfd))
4703 else if (output_section == obj_bsssec (output_bfd))
4708 /* Add the symbol value and the section VMA to the
4709 addend stored in the contents. */
4710 relocation = (h->root.u.def.value
4711 + output_section->vma
4712 + h->root.u.def.section->output_offset);
4716 /* We must change r_index according to the symbol
4718 r_index = symbol_map[r_index];
4724 /* We decided to strip this symbol, but it
4725 turns out that we can't. Note that we
4726 lose the other and desc information here.
4727 I don't think that will ever matter for a
4733 if (! aout_link_write_other_symbol (h,
4743 name = strings + GET_WORD (input_bfd,
4744 syms[r_index].e_strx);
4745 if (! ((*finfo->info->callbacks->unattached_reloc)
4746 (finfo->info, name, input_bfd, input_section,
4756 /* Write out the new r_index value. */
4757 if (bfd_header_big_endian (output_bfd))
4759 rel->r_index[0] = r_index >> 16;
4760 rel->r_index[1] = r_index >> 8;
4761 rel->r_index[2] = r_index;
4765 rel->r_index[2] = r_index >> 16;
4766 rel->r_index[1] = r_index >> 8;
4767 rel->r_index[0] = r_index;
4774 /* This is a relocation against a section. We must
4775 adjust by the amount that the section moved. */
4776 section = aout_reloc_index_to_section (input_bfd, r_index);
4777 relocation = (section->output_section->vma
4778 + section->output_offset
4782 /* Change the address of the relocation. */
4783 PUT_WORD (output_bfd,
4784 r_addr + input_section->output_offset,
4787 /* Adjust a PC relative relocation by removing the reference
4788 to the original address in the section and including the
4789 reference to the new address. */
4791 relocation -= (input_section->output_section->vma
4792 + input_section->output_offset
4793 - input_section->vma);
4795 #ifdef MY_relocatable_reloc
4796 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4799 if (relocation == 0)
4802 r = MY_relocate_contents (howto,
4803 input_bfd, relocation,
4810 /* We are generating an executable, and must do a full
4815 h = sym_hashes[r_index];
4817 if (h != (struct aout_link_hash_entry *) NULL
4818 && (h->root.type == bfd_link_hash_defined
4819 || h->root.type == bfd_link_hash_defweak))
4821 relocation = (h->root.u.def.value
4822 + h->root.u.def.section->output_section->vma
4823 + h->root.u.def.section->output_offset);
4825 else if (h != (struct aout_link_hash_entry *) NULL
4826 && h->root.type == bfd_link_hash_undefweak)
4838 section = aout_reloc_index_to_section (input_bfd, r_index);
4839 relocation = (section->output_section->vma
4840 + section->output_offset
4843 relocation += input_section->vma;
4846 if (check_dynamic_reloc != NULL)
4850 if (! ((*check_dynamic_reloc)
4851 (finfo->info, input_bfd, input_section, h,
4852 (PTR) rel, contents, &skip, &relocation)))
4858 /* Now warn if a global symbol is undefined. We could not
4859 do this earlier, because check_dynamic_reloc might want
4860 to skip this reloc. */
4861 if (hundef && ! finfo->info->shared && ! r_baserel)
4866 name = h->root.root.string;
4868 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4869 if (! ((*finfo->info->callbacks->undefined_symbol)
4870 (finfo->info, name, input_bfd, input_section, r_addr)))
4874 r = MY_final_link_relocate (howto,
4875 input_bfd, input_section,
4876 contents, r_addr, relocation,
4880 if (r != bfd_reloc_ok)
4885 case bfd_reloc_outofrange:
4887 case bfd_reloc_overflow:
4892 name = strings + GET_WORD (input_bfd,
4893 syms[r_index].e_strx);
4898 s = aout_reloc_index_to_section (input_bfd, r_index);
4899 name = bfd_section_name (input_bfd, s);
4901 if (! ((*finfo->info->callbacks->reloc_overflow)
4902 (finfo->info, name, howto->name,
4903 (bfd_vma) 0, input_bfd, input_section, r_addr)))
4914 /* Relocate an a.out section using extended a.out relocs. */
4917 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
4919 struct aout_final_link_info *finfo;
4921 asection *input_section;
4922 struct reloc_ext_external *relocs;
4923 bfd_size_type rel_size;
4926 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4928 struct aout_link_hash_entry *,
4929 PTR, bfd_byte *, boolean *,
4932 boolean relocateable;
4933 struct external_nlist *syms;
4935 struct aout_link_hash_entry **sym_hashes;
4937 bfd_size_type reloc_count;
4938 register struct reloc_ext_external *rel;
4939 struct reloc_ext_external *rel_end;
4941 output_bfd = finfo->output_bfd;
4942 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4944 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4945 BFD_ASSERT (input_bfd->xvec->header_byteorder
4946 == output_bfd->xvec->header_byteorder);
4948 relocateable = finfo->info->relocateable;
4949 syms = obj_aout_external_syms (input_bfd);
4950 strings = obj_aout_external_strings (input_bfd);
4951 sym_hashes = obj_aout_sym_hashes (input_bfd);
4952 symbol_map = finfo->symbol_map;
4954 reloc_count = rel_size / RELOC_EXT_SIZE;
4956 rel_end = rel + reloc_count;
4957 for (; rel < rel_end; rel++)
4962 unsigned int r_type;
4964 struct aout_link_hash_entry *h = NULL;
4965 asection *r_section = NULL;
4968 r_addr = GET_SWORD (input_bfd, rel->r_address);
4970 if (bfd_header_big_endian (input_bfd))
4972 r_index = ((rel->r_index[0] << 16)
4973 | (rel->r_index[1] << 8)
4975 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
4976 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
4977 >> RELOC_EXT_BITS_TYPE_SH_BIG);
4981 r_index = ((rel->r_index[2] << 16)
4982 | (rel->r_index[1] << 8)
4984 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
4985 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
4986 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
4989 r_addend = GET_SWORD (input_bfd, rel->r_addend);
4991 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
4995 /* We are generating a relocateable output file, and must
4996 modify the reloc accordingly. */
4999 /* If we know the symbol this relocation is against,
5000 convert it into a relocation against a section. This
5001 is what the native linker does. */
5002 h = sym_hashes[r_index];
5003 if (h != (struct aout_link_hash_entry *) NULL
5004 && (h->root.type == bfd_link_hash_defined
5005 || h->root.type == bfd_link_hash_defweak))
5007 asection *output_section;
5009 /* Change the r_extern value. */
5010 if (bfd_header_big_endian (output_bfd))
5011 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
5013 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
5015 /* Compute a new r_index. */
5016 output_section = h->root.u.def.section->output_section;
5017 if (output_section == obj_textsec (output_bfd))
5019 else if (output_section == obj_datasec (output_bfd))
5021 else if (output_section == obj_bsssec (output_bfd))
5026 /* Add the symbol value and the section VMA to the
5028 relocation = (h->root.u.def.value
5029 + output_section->vma
5030 + h->root.u.def.section->output_offset);
5032 /* Now RELOCATION is the VMA of the final
5033 destination. If this is a PC relative reloc,
5034 then ADDEND is the negative of the source VMA.
5035 We want to set ADDEND to the difference between
5036 the destination VMA and the source VMA, which
5037 means we must adjust RELOCATION by the change in
5038 the source VMA. This is done below. */
5042 /* We must change r_index according to the symbol
5044 r_index = symbol_map[r_index];
5050 /* We decided to strip this symbol, but it
5051 turns out that we can't. Note that we
5052 lose the other and desc information here.
5053 I don't think that will ever matter for a
5059 if (! aout_link_write_other_symbol (h,
5069 name = strings + GET_WORD (input_bfd,
5070 syms[r_index].e_strx);
5071 if (! ((*finfo->info->callbacks->unattached_reloc)
5072 (finfo->info, name, input_bfd, input_section,
5081 /* If this is a PC relative reloc, then the addend
5082 is the negative of the source VMA. We must
5083 adjust it by the change in the source VMA. This
5087 /* Write out the new r_index value. */
5088 if (bfd_header_big_endian (output_bfd))
5090 rel->r_index[0] = r_index >> 16;
5091 rel->r_index[1] = r_index >> 8;
5092 rel->r_index[2] = r_index;
5096 rel->r_index[2] = r_index >> 16;
5097 rel->r_index[1] = r_index >> 8;
5098 rel->r_index[0] = r_index;
5103 /* This is a relocation against a section. We must
5104 adjust by the amount that the section moved. */
5105 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5106 relocation = (r_section->output_section->vma
5107 + r_section->output_offset
5110 /* If this is a PC relative reloc, then the addend is
5111 the difference in VMA between the destination and the
5112 source. We have just adjusted for the change in VMA
5113 of the destination, so we must also adjust by the
5114 change in VMA of the source. This is done below. */
5117 /* As described above, we must always adjust a PC relative
5118 reloc by the change in VMA of the source. */
5119 if (howto_table_ext[r_type].pc_relative)
5120 relocation -= (input_section->output_section->vma
5121 + input_section->output_offset
5122 - input_section->vma);
5124 /* Change the addend if necessary. */
5125 if (relocation != 0)
5126 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
5128 /* Change the address of the relocation. */
5129 PUT_WORD (output_bfd,
5130 r_addr + input_section->output_offset,
5136 bfd_reloc_status_type r;
5138 /* We are generating an executable, and must do a full
5143 h = sym_hashes[r_index];
5145 if (h != (struct aout_link_hash_entry *) NULL
5146 && (h->root.type == bfd_link_hash_defined
5147 || h->root.type == bfd_link_hash_defweak))
5149 relocation = (h->root.u.def.value
5150 + h->root.u.def.section->output_section->vma
5151 + h->root.u.def.section->output_offset);
5153 else if (h != (struct aout_link_hash_entry *) NULL
5154 && h->root.type == bfd_link_hash_undefweak)
5162 else if (r_type == RELOC_BASE10
5163 || r_type == RELOC_BASE13
5164 || r_type == RELOC_BASE22)
5166 struct external_nlist *sym;
5169 /* For base relative relocs, r_index is always an index
5170 into the symbol table, even if r_extern is 0. */
5171 sym = syms + r_index;
5172 type = bfd_h_get_8 (input_bfd, sym->e_type);
5173 if ((type & N_TYPE) == N_TEXT
5175 r_section = obj_textsec (input_bfd);
5176 else if ((type & N_TYPE) == N_DATA
5178 r_section = obj_datasec (input_bfd);
5179 else if ((type & N_TYPE) == N_BSS
5181 r_section = obj_bsssec (input_bfd);
5182 else if ((type & N_TYPE) == N_ABS
5184 r_section = bfd_abs_section_ptr;
5187 relocation = (r_section->output_section->vma
5188 + r_section->output_offset
5189 + (GET_WORD (input_bfd, sym->e_value)
5194 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5196 /* If this is a PC relative reloc, then R_ADDEND is the
5197 difference between the two vmas, or
5198 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
5200 old_dest_sec == section->vma
5202 old_src_sec == input_section->vma
5204 old_src_off == r_addr
5206 _bfd_final_link_relocate expects RELOCATION +
5207 R_ADDEND to be the VMA of the destination minus
5208 r_addr (the minus r_addr is because this relocation
5209 is not pcrel_offset, which is a bit confusing and
5210 should, perhaps, be changed), or
5213 new_dest_sec == output_section->vma + output_offset
5214 We arrange for this to happen by setting RELOCATION to
5215 new_dest_sec + old_src_sec - old_dest_sec
5217 If this is not a PC relative reloc, then R_ADDEND is
5218 simply the VMA of the destination, so we set
5219 RELOCATION to the change in the destination VMA, or
5220 new_dest_sec - old_dest_sec
5222 relocation = (r_section->output_section->vma
5223 + r_section->output_offset
5225 if (howto_table_ext[r_type].pc_relative)
5226 relocation += input_section->vma;
5229 if (check_dynamic_reloc != NULL)
5233 if (! ((*check_dynamic_reloc)
5234 (finfo->info, input_bfd, input_section, h,
5235 (PTR) rel, contents, &skip, &relocation)))
5241 /* Now warn if a global symbol is undefined. We could not
5242 do this earlier, because check_dynamic_reloc might want
5243 to skip this reloc. */
5245 && ! finfo->info->shared
5246 && r_type != RELOC_BASE10
5247 && r_type != RELOC_BASE13
5248 && r_type != RELOC_BASE22)
5253 name = h->root.root.string;
5255 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5256 if (! ((*finfo->info->callbacks->undefined_symbol)
5257 (finfo->info, name, input_bfd, input_section, r_addr)))
5261 r = MY_final_link_relocate (howto_table_ext + r_type,
5262 input_bfd, input_section,
5263 contents, r_addr, relocation,
5265 if (r != bfd_reloc_ok)
5270 case bfd_reloc_outofrange:
5272 case bfd_reloc_overflow:
5277 || r_type == RELOC_BASE10
5278 || r_type == RELOC_BASE13
5279 || r_type == RELOC_BASE22)
5280 name = strings + GET_WORD (input_bfd,
5281 syms[r_index].e_strx);
5286 s = aout_reloc_index_to_section (input_bfd, r_index);
5287 name = bfd_section_name (input_bfd, s);
5289 if (! ((*finfo->info->callbacks->reloc_overflow)
5290 (finfo->info, name, howto_table_ext[r_type].name,
5291 r_addend, input_bfd, input_section, r_addr)))
5303 /* Handle a link order which is supposed to generate a reloc. */
5306 aout_link_reloc_link_order (finfo, o, p)
5307 struct aout_final_link_info *finfo;
5309 struct bfd_link_order *p;
5311 struct bfd_link_order_reloc *pr;
5314 reloc_howto_type *howto;
5315 file_ptr *reloff_ptr;
5316 struct reloc_std_external srel;
5317 struct reloc_ext_external erel;
5322 if (p->type == bfd_section_reloc_link_order)
5325 if (bfd_is_abs_section (pr->u.section))
5326 r_index = N_ABS | N_EXT;
5329 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5330 r_index = pr->u.section->target_index;
5335 struct aout_link_hash_entry *h;
5337 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5339 h = ((struct aout_link_hash_entry *)
5340 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
5341 pr->u.name, false, false, true));
5342 if (h != (struct aout_link_hash_entry *) NULL
5347 /* We decided to strip this symbol, but it turns out that we
5348 can't. Note that we lose the other and desc information
5349 here. I don't think that will ever matter for a global
5353 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5359 if (! ((*finfo->info->callbacks->unattached_reloc)
5360 (finfo->info, pr->u.name, (bfd *) NULL,
5361 (asection *) NULL, (bfd_vma) 0)))
5367 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5370 bfd_set_error (bfd_error_bad_value);
5374 if (o == obj_textsec (finfo->output_bfd))
5375 reloff_ptr = &finfo->treloff;
5376 else if (o == obj_datasec (finfo->output_bfd))
5377 reloff_ptr = &finfo->dreloff;
5381 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5384 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto,
5394 r_pcrel = howto->pc_relative;
5395 r_baserel = (howto->type & 8) != 0;
5396 r_jmptable = (howto->type & 16) != 0;
5397 r_relative = (howto->type & 32) != 0;
5398 r_length = howto->size;
5400 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5401 if (bfd_header_big_endian (finfo->output_bfd))
5403 srel.r_index[0] = r_index >> 16;
5404 srel.r_index[1] = r_index >> 8;
5405 srel.r_index[2] = r_index;
5407 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5408 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5409 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5410 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5411 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5412 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5416 srel.r_index[2] = r_index >> 16;
5417 srel.r_index[1] = r_index >> 8;
5418 srel.r_index[0] = r_index;
5420 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5421 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5422 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5423 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5424 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5425 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5429 rel_ptr = (PTR) &srel;
5431 /* We have to write the addend into the object file, since
5432 standard a.out relocs are in place. It would be more
5433 reliable if we had the current contents of the file here,
5434 rather than assuming zeroes, but we can't read the file since
5435 it was opened using bfd_openw. */
5436 if (pr->addend != 0)
5439 bfd_reloc_status_type r;
5443 size = bfd_get_reloc_size (howto);
5444 buf = (bfd_byte *) bfd_zmalloc (size);
5445 if (buf == (bfd_byte *) NULL)
5447 r = MY_relocate_contents (howto, finfo->output_bfd,
5454 case bfd_reloc_outofrange:
5456 case bfd_reloc_overflow:
5457 if (! ((*finfo->info->callbacks->reloc_overflow)
5459 (p->type == bfd_section_reloc_link_order
5460 ? bfd_section_name (finfo->output_bfd,
5463 howto->name, pr->addend, (bfd *) NULL,
5464 (asection *) NULL, (bfd_vma) 0)))
5471 ok = bfd_set_section_contents (finfo->output_bfd, o,
5473 (file_ptr) p->offset,
5482 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5484 if (bfd_header_big_endian (finfo->output_bfd))
5486 erel.r_index[0] = r_index >> 16;
5487 erel.r_index[1] = r_index >> 8;
5488 erel.r_index[2] = r_index;
5490 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5491 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5495 erel.r_index[2] = r_index >> 16;
5496 erel.r_index[1] = r_index >> 8;
5497 erel.r_index[0] = r_index;
5499 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5500 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5503 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
5505 rel_ptr = (PTR) &erel;
5508 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5509 || (bfd_write (rel_ptr, (bfd_size_type) 1,
5510 obj_reloc_entry_size (finfo->output_bfd),
5512 != obj_reloc_entry_size (finfo->output_bfd)))
5515 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5517 /* Assert that the relocs have not run into the symbols, and that n
5518 the text relocs have not run into the data relocs. */
5519 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5520 && (reloff_ptr != &finfo->treloff
5522 <= obj_datasec (finfo->output_bfd)->rel_filepos)));