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;
748 /* start-sanitize-rce */
752 /* end-sanitize-rce */
755 arch_flags = M_UNKNOWN;
758 if (arch_flags != M_UNKNOWN)
767 aout_@var{size}_set_arch_mach
770 boolean aout_@var{size}_set_arch_mach,
772 enum bfd_architecture arch,
773 unsigned long machine));
776 Set the architecture and the machine of the BFD @var{abfd} to the
777 values @var{arch} and @var{machine}. Verify that @var{abfd}'s format
778 can support the architecture required.
782 NAME(aout,set_arch_mach) (abfd, arch, machine)
784 enum bfd_architecture arch;
785 unsigned long machine;
787 if (! bfd_default_set_arch_mach (abfd, arch, machine))
790 if (arch != bfd_arch_unknown)
794 NAME(aout,machine_type) (arch, machine, &unknown);
799 /* Determine the size of a relocation entry */
804 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
807 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
811 return (*aout_backend_info(abfd)->set_sizes) (abfd);
815 adjust_o_magic (abfd, execp)
817 struct internal_exec *execp;
819 file_ptr pos = adata (abfd).exec_bytes_size;
824 obj_textsec(abfd)->filepos = pos;
825 if (!obj_textsec(abfd)->user_set_vma)
826 obj_textsec(abfd)->vma = vma;
828 vma = obj_textsec(abfd)->vma;
830 pos += obj_textsec(abfd)->_raw_size;
831 vma += obj_textsec(abfd)->_raw_size;
834 if (!obj_datasec(abfd)->user_set_vma)
836 #if 0 /* ?? Does alignment in the file image really matter? */
837 pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
839 obj_textsec(abfd)->_raw_size += pad;
842 obj_datasec(abfd)->vma = vma;
845 vma = obj_datasec(abfd)->vma;
846 obj_datasec(abfd)->filepos = pos;
847 pos += obj_datasec(abfd)->_raw_size;
848 vma += obj_datasec(abfd)->_raw_size;
851 if (!obj_bsssec(abfd)->user_set_vma)
854 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
856 obj_datasec(abfd)->_raw_size += pad;
859 obj_bsssec(abfd)->vma = vma;
863 /* The VMA of the .bss section is set by the the VMA of the
864 .data section plus the size of the .data section. We may
865 need to add padding bytes to make this true. */
866 pad = obj_bsssec (abfd)->vma - vma;
869 obj_datasec (abfd)->_raw_size += pad;
873 obj_bsssec(abfd)->filepos = pos;
875 /* Fix up the exec header. */
876 execp->a_text = obj_textsec(abfd)->_raw_size;
877 execp->a_data = obj_datasec(abfd)->_raw_size;
878 execp->a_bss = obj_bsssec(abfd)->_raw_size;
879 N_SET_MAGIC (*execp, OMAGIC);
883 adjust_z_magic (abfd, execp)
885 struct internal_exec *execp;
887 bfd_size_type data_pad, text_pad;
889 CONST struct aout_backend_data *abdp;
890 int ztih; /* Nonzero if text includes exec header. */
892 abdp = aout_backend_info (abfd);
896 && (abdp->text_includes_header
897 || obj_aout_subformat (abfd) == q_magic_format));
898 obj_textsec(abfd)->filepos = (ztih
899 ? adata(abfd).exec_bytes_size
900 : adata(abfd).zmagic_disk_block_size);
901 if (! obj_textsec(abfd)->user_set_vma)
903 /* ?? Do we really need to check for relocs here? */
904 obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
907 ? (abdp->default_text_vma
908 + adata(abfd).exec_bytes_size)
909 : abdp->default_text_vma));
914 /* The .text section is being loaded at an unusual address. We
915 may need to pad it such that the .data section starts at a page
918 text_pad = ((obj_textsec (abfd)->filepos - obj_textsec (abfd)->vma)
919 & (adata (abfd).page_size - 1));
921 text_pad = ((- obj_textsec (abfd)->vma)
922 & (adata (abfd).page_size - 1));
925 /* Find start of data. */
928 text_end = obj_textsec (abfd)->filepos + obj_textsec (abfd)->_raw_size;
929 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
933 /* Note that if page_size == zmagic_disk_block_size, then
934 filepos == page_size, and this case is the same as the ztih
936 text_end = obj_textsec (abfd)->_raw_size;
937 text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
938 text_end += obj_textsec (abfd)->filepos;
940 obj_textsec(abfd)->_raw_size += text_pad;
941 text_end += text_pad;
944 if (!obj_datasec(abfd)->user_set_vma)
947 vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
948 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
950 if (abdp && abdp->zmagic_mapped_contiguous)
952 text_pad = (obj_datasec(abfd)->vma
953 - obj_textsec(abfd)->vma
954 - obj_textsec(abfd)->_raw_size);
955 obj_textsec(abfd)->_raw_size += text_pad;
957 obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
958 + obj_textsec(abfd)->_raw_size);
960 /* Fix up exec header while we're at it. */
961 execp->a_text = obj_textsec(abfd)->_raw_size;
962 if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
963 execp->a_text += adata(abfd).exec_bytes_size;
964 if (obj_aout_subformat (abfd) == q_magic_format)
965 N_SET_MAGIC (*execp, QMAGIC);
967 N_SET_MAGIC (*execp, ZMAGIC);
969 /* Spec says data section should be rounded up to page boundary. */
970 obj_datasec(abfd)->_raw_size
971 = align_power (obj_datasec(abfd)->_raw_size,
972 obj_bsssec(abfd)->alignment_power);
973 execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
974 adata(abfd).page_size);
975 data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
978 if (!obj_bsssec(abfd)->user_set_vma)
979 obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
980 + obj_datasec(abfd)->_raw_size);
981 /* If the BSS immediately follows the data section and extra space
982 in the page is left after the data section, fudge data
983 in the header so that the bss section looks smaller by that
984 amount. We'll start the bss section there, and lie to the OS.
985 (Note that a linker script, as well as the above assignment,
986 could have explicitly set the BSS vma to immediately follow
987 the data section.) */
988 if (align_power (obj_bsssec(abfd)->vma, obj_bsssec(abfd)->alignment_power)
989 == obj_datasec(abfd)->vma + obj_datasec(abfd)->_raw_size)
990 execp->a_bss = (data_pad > obj_bsssec(abfd)->_raw_size) ? 0 :
991 obj_bsssec(abfd)->_raw_size - data_pad;
993 execp->a_bss = obj_bsssec(abfd)->_raw_size;
997 adjust_n_magic (abfd, execp)
999 struct internal_exec *execp;
1001 file_ptr pos = adata(abfd).exec_bytes_size;
1006 obj_textsec(abfd)->filepos = pos;
1007 if (!obj_textsec(abfd)->user_set_vma)
1008 obj_textsec(abfd)->vma = vma;
1010 vma = obj_textsec(abfd)->vma;
1011 pos += obj_textsec(abfd)->_raw_size;
1012 vma += obj_textsec(abfd)->_raw_size;
1015 obj_datasec(abfd)->filepos = pos;
1016 if (!obj_datasec(abfd)->user_set_vma)
1017 obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
1018 vma = obj_datasec(abfd)->vma;
1020 /* Since BSS follows data immediately, see if it needs alignment. */
1021 vma += obj_datasec(abfd)->_raw_size;
1022 pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
1023 obj_datasec(abfd)->_raw_size += pad;
1024 pos += obj_datasec(abfd)->_raw_size;
1027 if (!obj_bsssec(abfd)->user_set_vma)
1028 obj_bsssec(abfd)->vma = vma;
1030 vma = obj_bsssec(abfd)->vma;
1032 /* Fix up exec header. */
1033 execp->a_text = obj_textsec(abfd)->_raw_size;
1034 execp->a_data = obj_datasec(abfd)->_raw_size;
1035 execp->a_bss = obj_bsssec(abfd)->_raw_size;
1036 N_SET_MAGIC (*execp, NMAGIC);
1040 NAME(aout,adjust_sizes_and_vmas) (abfd, text_size, text_end)
1042 bfd_size_type *text_size;
1045 struct internal_exec *execp = exec_hdr (abfd);
1047 if (! NAME(aout,make_sections) (abfd))
1050 if (adata(abfd).magic != undecided_magic)
1053 obj_textsec(abfd)->_raw_size =
1054 align_power(obj_textsec(abfd)->_raw_size,
1055 obj_textsec(abfd)->alignment_power);
1057 *text_size = obj_textsec (abfd)->_raw_size;
1058 /* Rule (heuristic) for when to pad to a new page. Note that there
1059 are (at least) two ways demand-paged (ZMAGIC) files have been
1060 handled. Most Berkeley-based systems start the text segment at
1061 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1062 segment right after the exec header; the latter is counted in the
1063 text segment size, and is paged in by the kernel with the rest of
1066 /* This perhaps isn't the right way to do this, but made it simpler for me
1067 to understand enough to implement it. Better would probably be to go
1068 right from BFD flags to alignment/positioning characteristics. But the
1069 old code was sloppy enough about handling the flags, and had enough
1070 other magic, that it was a little hard for me to understand. I think
1071 I understand it better now, but I haven't time to do the cleanup this
1074 if (abfd->flags & D_PAGED)
1075 /* Whether or not WP_TEXT is set -- let D_PAGED override. */
1076 adata(abfd).magic = z_magic;
1077 else if (abfd->flags & WP_TEXT)
1078 adata(abfd).magic = n_magic;
1080 adata(abfd).magic = o_magic;
1082 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1084 fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1086 switch (adata(abfd).magic) {
1087 case n_magic: str = "NMAGIC"; break;
1088 case o_magic: str = "OMAGIC"; break;
1089 case z_magic: str = "ZMAGIC"; break;
1094 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1095 obj_textsec(abfd)->alignment_power,
1096 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1097 obj_datasec(abfd)->alignment_power,
1098 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size,
1099 obj_bsssec(abfd)->alignment_power);
1103 switch (adata(abfd).magic)
1106 adjust_o_magic (abfd, execp);
1109 adjust_z_magic (abfd, execp);
1112 adjust_n_magic (abfd, execp);
1118 #ifdef BFD_AOUT_DEBUG
1119 fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1120 obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size,
1121 obj_textsec(abfd)->filepos,
1122 obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size,
1123 obj_datasec(abfd)->filepos,
1124 obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
1132 aout_@var{size}_new_section_hook
1135 boolean aout_@var{size}_new_section_hook,
1137 asection *newsect));
1140 Called by the BFD in response to a @code{bfd_make_section}
1144 NAME(aout,new_section_hook) (abfd, newsect)
1148 /* align to double at least */
1149 newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
1152 if (bfd_get_format (abfd) == bfd_object)
1154 if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
1155 obj_textsec(abfd)= newsect;
1156 newsect->target_index = N_TEXT;
1160 if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
1161 obj_datasec(abfd) = newsect;
1162 newsect->target_index = N_DATA;
1166 if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
1167 obj_bsssec(abfd) = newsect;
1168 newsect->target_index = N_BSS;
1174 /* We allow more than three sections internally */
1179 NAME(aout,set_section_contents) (abfd, section, location, offset, count)
1184 bfd_size_type count;
1187 bfd_size_type text_size;
1189 if (! abfd->output_has_begun)
1191 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
1195 if (section == obj_bsssec (abfd))
1197 bfd_set_error (bfd_error_no_contents);
1201 if (section != obj_textsec (abfd)
1202 && section != obj_datasec (abfd))
1204 (*_bfd_error_handler)
1205 ("%s: can not represent section `%s' in a.out object file format",
1206 bfd_get_filename (abfd), bfd_get_section_name (abfd, section));
1207 bfd_set_error (bfd_error_nonrepresentable_section);
1213 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1214 || bfd_write (location, 1, count, abfd) != count)
1221 /* Read the external symbols from an a.out file. */
1224 aout_get_external_symbols (abfd)
1227 if (obj_aout_external_syms (abfd) == (struct external_nlist *) NULL)
1229 bfd_size_type count;
1230 struct external_nlist *syms;
1232 count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
1235 if (bfd_get_file_window (abfd,
1236 obj_sym_filepos (abfd), exec_hdr (abfd)->a_syms,
1237 &obj_aout_sym_window (abfd), true) == false)
1239 syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
1241 /* We allocate using malloc to make the values easy to free
1242 later on. If we put them on the obstack it might not be
1243 possible to free them. */
1244 syms = ((struct external_nlist *)
1245 bfd_malloc ((size_t) count * EXTERNAL_NLIST_SIZE));
1246 if (syms == (struct external_nlist *) NULL && count != 0)
1249 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1250 || (bfd_read (syms, 1, exec_hdr (abfd)->a_syms, abfd)
1251 != exec_hdr (abfd)->a_syms))
1258 obj_aout_external_syms (abfd) = syms;
1259 obj_aout_external_sym_count (abfd) = count;
1262 if (obj_aout_external_strings (abfd) == NULL
1263 && exec_hdr (abfd)->a_syms != 0)
1265 unsigned char string_chars[BYTES_IN_WORD];
1266 bfd_size_type stringsize;
1269 /* Get the size of the strings. */
1270 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
1271 || (bfd_read ((PTR) string_chars, BYTES_IN_WORD, 1, abfd)
1274 stringsize = GET_WORD (abfd, string_chars);
1277 if (bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize,
1278 &obj_aout_string_window (abfd), true) == false)
1280 strings = (char *) obj_aout_string_window (abfd).data;
1282 strings = (char *) bfd_malloc ((size_t) stringsize + 1);
1283 if (strings == NULL)
1286 /* Skip space for the string count in the buffer for convenience
1287 when using indexes. */
1288 if (bfd_read (strings + BYTES_IN_WORD, 1, stringsize - BYTES_IN_WORD,
1290 != stringsize - BYTES_IN_WORD)
1297 /* Ensure that a zero index yields an empty string. */
1300 strings[stringsize - 1] = 0;
1302 obj_aout_external_strings (abfd) = strings;
1303 obj_aout_external_string_size (abfd) = stringsize;
1309 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1310 and symbol->value fields of CACHE_PTR will be set from the a.out
1311 nlist structure. This function is responsible for setting
1312 symbol->flags and symbol->section, and adjusting symbol->value. */
1315 translate_from_native_sym_flags (abfd, cache_ptr)
1317 aout_symbol_type *cache_ptr;
1321 if ((cache_ptr->type & N_STAB) != 0
1322 || cache_ptr->type == N_FN)
1326 /* This is a debugging symbol. */
1328 cache_ptr->symbol.flags = BSF_DEBUGGING;
1330 /* Work out the symbol section. */
1331 switch (cache_ptr->type & N_TYPE)
1335 sec = obj_textsec (abfd);
1338 sec = obj_datasec (abfd);
1341 sec = obj_bsssec (abfd);
1345 sec = bfd_abs_section_ptr;
1349 cache_ptr->symbol.section = sec;
1350 cache_ptr->symbol.value -= sec->vma;
1355 /* Get the default visibility. This does not apply to all types, so
1356 we just hold it in a local variable to use if wanted. */
1357 if ((cache_ptr->type & N_EXT) == 0)
1358 visible = BSF_LOCAL;
1360 visible = BSF_GLOBAL;
1362 switch (cache_ptr->type)
1365 case N_ABS: case N_ABS | N_EXT:
1366 cache_ptr->symbol.section = bfd_abs_section_ptr;
1367 cache_ptr->symbol.flags = visible;
1370 case N_UNDF | N_EXT:
1371 if (cache_ptr->symbol.value != 0)
1373 /* This is a common symbol. */
1374 cache_ptr->symbol.flags = BSF_GLOBAL;
1375 cache_ptr->symbol.section = bfd_com_section_ptr;
1379 cache_ptr->symbol.flags = 0;
1380 cache_ptr->symbol.section = bfd_und_section_ptr;
1384 case N_TEXT: case N_TEXT | N_EXT:
1385 cache_ptr->symbol.section = obj_textsec (abfd);
1386 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1387 cache_ptr->symbol.flags = visible;
1390 /* N_SETV symbols used to represent set vectors placed in the
1391 data section. They are no longer generated. Theoretically,
1392 it was possible to extract the entries and combine them with
1393 new ones, although I don't know if that was ever actually
1394 done. Unless that feature is restored, treat them as data
1396 case N_SETV: case N_SETV | N_EXT:
1397 case N_DATA: case N_DATA | N_EXT:
1398 cache_ptr->symbol.section = obj_datasec (abfd);
1399 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1400 cache_ptr->symbol.flags = visible;
1403 case N_BSS: case N_BSS | N_EXT:
1404 cache_ptr->symbol.section = obj_bsssec (abfd);
1405 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1406 cache_ptr->symbol.flags = visible;
1409 case N_SETA: case N_SETA | N_EXT:
1410 case N_SETT: case N_SETT | N_EXT:
1411 case N_SETD: case N_SETD | N_EXT:
1412 case N_SETB: case N_SETB | N_EXT:
1415 arelent_chain *reloc;
1416 asection *into_section;
1418 /* This is a set symbol. The name of the symbol is the name
1419 of the set (e.g., __CTOR_LIST__). The value of the symbol
1420 is the value to add to the set. We create a section with
1421 the same name as the symbol, and add a reloc to insert the
1422 appropriate value into the section.
1424 This action is actually obsolete; it used to make the
1425 linker do the right thing, but the linker no longer uses
1428 section = bfd_get_section_by_name (abfd, cache_ptr->symbol.name);
1429 if (section == NULL)
1433 copy = bfd_alloc (abfd, strlen (cache_ptr->symbol.name) + 1);
1437 strcpy (copy, cache_ptr->symbol.name);
1438 section = bfd_make_section (abfd, copy);
1439 if (section == NULL)
1443 reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
1447 /* Build a relocation entry for the constructor. */
1448 switch (cache_ptr->type & N_TYPE)
1451 into_section = bfd_abs_section_ptr;
1452 cache_ptr->type = N_ABS;
1455 into_section = obj_textsec (abfd);
1456 cache_ptr->type = N_TEXT;
1459 into_section = obj_datasec (abfd);
1460 cache_ptr->type = N_DATA;
1463 into_section = obj_bsssec (abfd);
1464 cache_ptr->type = N_BSS;
1468 /* Build a relocation pointing into the constructor section
1469 pointing at the symbol in the set vector specified. */
1470 reloc->relent.addend = cache_ptr->symbol.value;
1471 cache_ptr->symbol.section = into_section;
1472 reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
1474 /* We modify the symbol to belong to a section depending upon
1475 the name of the symbol, and add to the size of the section
1476 to contain a pointer to the symbol. Build a reloc entry to
1477 relocate to this symbol attached to this section. */
1478 section->flags = SEC_CONSTRUCTOR | SEC_RELOC;
1480 section->reloc_count++;
1481 section->alignment_power = 2;
1483 reloc->next = section->constructor_chain;
1484 section->constructor_chain = reloc;
1485 reloc->relent.address = section->_raw_size;
1486 section->_raw_size += BYTES_IN_WORD;
1488 reloc->relent.howto = CTOR_TABLE_RELOC_HOWTO(abfd);
1490 cache_ptr->symbol.flags |= BSF_CONSTRUCTOR;
1495 /* This symbol is the text of a warning message. The next
1496 symbol is the symbol to associate the warning with. If a
1497 reference is made to that symbol, a warning is issued. */
1498 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
1499 cache_ptr->symbol.section = bfd_abs_section_ptr;
1502 case N_INDR: case N_INDR | N_EXT:
1503 /* An indirect symbol. This consists of two symbols in a row.
1504 The first symbol is the name of the indirection. The second
1505 symbol is the name of the target. A reference to the first
1506 symbol becomes a reference to the second. */
1507 cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT | visible;
1508 cache_ptr->symbol.section = bfd_ind_section_ptr;
1512 cache_ptr->symbol.section = bfd_und_section_ptr;
1513 cache_ptr->symbol.flags = BSF_WEAK;
1517 cache_ptr->symbol.section = bfd_abs_section_ptr;
1518 cache_ptr->symbol.flags = BSF_WEAK;
1522 cache_ptr->symbol.section = obj_textsec (abfd);
1523 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1524 cache_ptr->symbol.flags = BSF_WEAK;
1528 cache_ptr->symbol.section = obj_datasec (abfd);
1529 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1530 cache_ptr->symbol.flags = BSF_WEAK;
1534 cache_ptr->symbol.section = obj_bsssec (abfd);
1535 cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
1536 cache_ptr->symbol.flags = BSF_WEAK;
1543 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1546 translate_to_native_sym_flags (abfd, cache_ptr, sym_pointer)
1549 struct external_nlist *sym_pointer;
1551 bfd_vma value = cache_ptr->value;
1555 /* Mask out any existing type bits in case copying from one section
1557 sym_pointer->e_type[0] &= ~N_TYPE;
1559 sec = bfd_get_section (cache_ptr);
1564 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1566 (*_bfd_error_handler)
1567 ("%s: can not represent section `%s' in a.out object file format",
1568 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1569 bfd_set_error (bfd_error_nonrepresentable_section);
1573 if (sec->output_section != NULL)
1575 off = sec->output_offset;
1576 sec = sec->output_section;
1579 if (bfd_is_abs_section (sec))
1580 sym_pointer->e_type[0] |= N_ABS;
1581 else if (sec == obj_textsec (abfd))
1582 sym_pointer->e_type[0] |= N_TEXT;
1583 else if (sec == obj_datasec (abfd))
1584 sym_pointer->e_type[0] |= N_DATA;
1585 else if (sec == obj_bsssec (abfd))
1586 sym_pointer->e_type[0] |= N_BSS;
1587 else if (bfd_is_und_section (sec))
1588 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1589 else if (bfd_is_ind_section (sec))
1590 sym_pointer->e_type[0] = N_INDR;
1591 else if (bfd_is_com_section (sec))
1592 sym_pointer->e_type[0] = N_UNDF | N_EXT;
1595 (*_bfd_error_handler)
1596 ("%s: can not represent section `%s' in a.out object file format",
1597 bfd_get_filename (abfd), bfd_get_section_name (abfd, sec));
1598 bfd_set_error (bfd_error_nonrepresentable_section);
1602 /* Turn the symbol from section relative to absolute again */
1603 value += sec->vma + off;
1605 if ((cache_ptr->flags & BSF_WARNING) != 0)
1606 sym_pointer->e_type[0] = N_WARNING;
1608 if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
1609 sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
1610 else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
1611 sym_pointer->e_type[0] |= N_EXT;
1613 if ((cache_ptr->flags & BSF_CONSTRUCTOR) != 0)
1615 int type = ((aout_symbol_type *) cache_ptr)->type;
1618 case N_ABS: type = N_SETA; break;
1619 case N_TEXT: type = N_SETT; break;
1620 case N_DATA: type = N_SETD; break;
1621 case N_BSS: type = N_SETB; break;
1623 sym_pointer->e_type[0] = type;
1626 if ((cache_ptr->flags & BSF_WEAK) != 0)
1630 switch (sym_pointer->e_type[0] & N_TYPE)
1633 case N_ABS: type = N_WEAKA; break;
1634 case N_TEXT: type = N_WEAKT; break;
1635 case N_DATA: type = N_WEAKD; break;
1636 case N_BSS: type = N_WEAKB; break;
1637 case N_UNDF: type = N_WEAKU; break;
1639 sym_pointer->e_type[0] = type;
1642 PUT_WORD(abfd, value, sym_pointer->e_value);
1647 /* Native-level interface to symbols. */
1650 NAME(aout,make_empty_symbol) (abfd)
1653 aout_symbol_type *new =
1654 (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
1657 new->symbol.the_bfd = abfd;
1659 return &new->symbol;
1662 /* Translate a set of internal symbols into external symbols. */
1665 NAME(aout,translate_symbol_table) (abfd, in, ext, count, str, strsize, dynamic)
1667 aout_symbol_type *in;
1668 struct external_nlist *ext;
1669 bfd_size_type count;
1671 bfd_size_type strsize;
1674 struct external_nlist *ext_end;
1676 ext_end = ext + count;
1677 for (; ext < ext_end; ext++, in++)
1681 x = GET_WORD (abfd, ext->e_strx);
1682 in->symbol.the_bfd = abfd;
1684 /* For the normal symbols, the zero index points at the number
1685 of bytes in the string table but is to be interpreted as the
1686 null string. For the dynamic symbols, the number of bytes in
1687 the string table is stored in the __DYNAMIC structure and the
1688 zero index points at an actual string. */
1689 if (x == 0 && ! dynamic)
1690 in->symbol.name = "";
1691 else if (x < strsize)
1692 in->symbol.name = str + x;
1696 in->symbol.value = GET_SWORD (abfd, ext->e_value);
1697 in->desc = bfd_h_get_16 (abfd, ext->e_desc);
1698 in->other = bfd_h_get_8 (abfd, ext->e_other);
1699 in->type = bfd_h_get_8 (abfd, ext->e_type);
1700 in->symbol.udata.p = NULL;
1702 if (! translate_from_native_sym_flags (abfd, in))
1706 in->symbol.flags |= BSF_DYNAMIC;
1712 /* We read the symbols into a buffer, which is discarded when this
1713 function exits. We read the strings into a buffer large enough to
1714 hold them all plus all the cached symbol entries. */
1717 NAME(aout,slurp_symbol_table) (abfd)
1720 struct external_nlist *old_external_syms;
1721 aout_symbol_type *cached;
1724 /* If there's no work to be done, don't do any */
1725 if (obj_aout_symbols (abfd) != (aout_symbol_type *) NULL)
1728 old_external_syms = obj_aout_external_syms (abfd);
1730 if (! aout_get_external_symbols (abfd))
1733 cached_size = (obj_aout_external_sym_count (abfd)
1734 * sizeof (aout_symbol_type));
1735 cached = (aout_symbol_type *) bfd_malloc (cached_size);
1736 if (cached == NULL && cached_size != 0)
1738 if (cached_size != 0)
1739 memset (cached, 0, cached_size);
1741 /* Convert from external symbol information to internal. */
1742 if (! (NAME(aout,translate_symbol_table)
1744 obj_aout_external_syms (abfd),
1745 obj_aout_external_sym_count (abfd),
1746 obj_aout_external_strings (abfd),
1747 obj_aout_external_string_size (abfd),
1754 bfd_get_symcount (abfd) = obj_aout_external_sym_count (abfd);
1756 obj_aout_symbols (abfd) = cached;
1758 /* It is very likely that anybody who calls this function will not
1759 want the external symbol information, so if it was allocated
1760 because of our call to aout_get_external_symbols, we free it up
1761 right away to save space. */
1762 if (old_external_syms == (struct external_nlist *) NULL
1763 && obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
1766 bfd_free_window (&obj_aout_sym_window (abfd));
1768 free (obj_aout_external_syms (abfd));
1770 obj_aout_external_syms (abfd) = NULL;
1776 /* We use a hash table when writing out symbols so that we only write
1777 out a particular string once. This helps particularly when the
1778 linker writes out stabs debugging entries, because each different
1779 contributing object file tends to have many duplicate stabs
1782 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1783 if BFD_TRADITIONAL_FORMAT is set. */
1785 static bfd_size_type add_to_stringtab
1786 PARAMS ((bfd *, struct bfd_strtab_hash *, const char *, boolean));
1787 static boolean emit_stringtab PARAMS ((bfd *, struct bfd_strtab_hash *));
1789 /* Get the index of a string in a strtab, adding it if it is not
1792 static INLINE bfd_size_type
1793 add_to_stringtab (abfd, tab, str, copy)
1795 struct bfd_strtab_hash *tab;
1800 bfd_size_type index;
1802 /* An index of 0 always means the empty string. */
1803 if (str == 0 || *str == '\0')
1806 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1807 doesn't understand a hashed string table. */
1809 if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1812 index = _bfd_stringtab_add (tab, str, hash, copy);
1814 if (index != (bfd_size_type) -1)
1816 /* Add BYTES_IN_WORD to the return value to account for the
1817 space taken up by the string table size. */
1818 index += BYTES_IN_WORD;
1824 /* Write out a strtab. ABFD is already at the right location in the
1828 emit_stringtab (abfd, tab)
1830 struct bfd_strtab_hash *tab;
1832 bfd_byte buffer[BYTES_IN_WORD];
1834 /* The string table starts with the size. */
1835 PUT_WORD (abfd, _bfd_stringtab_size (tab) + BYTES_IN_WORD, buffer);
1836 if (bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd) != BYTES_IN_WORD)
1839 return _bfd_stringtab_emit (abfd, tab);
1843 NAME(aout,write_syms) (abfd)
1846 unsigned int count ;
1847 asymbol **generic = bfd_get_outsymbols (abfd);
1848 struct bfd_strtab_hash *strtab;
1850 strtab = _bfd_stringtab_init ();
1854 for (count = 0; count < bfd_get_symcount (abfd); count++)
1856 asymbol *g = generic[count];
1858 struct external_nlist nsp;
1860 indx = add_to_stringtab (abfd, strtab, g->name, false);
1861 if (indx == (bfd_size_type) -1)
1863 PUT_WORD (abfd, indx, (bfd_byte *) nsp.e_strx);
1865 if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
1867 bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
1868 bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
1869 bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
1873 bfd_h_put_16(abfd,0, nsp.e_desc);
1874 bfd_h_put_8(abfd, 0, nsp.e_other);
1875 bfd_h_put_8(abfd, 0, nsp.e_type);
1878 if (! translate_to_native_sym_flags (abfd, g, &nsp))
1881 if (bfd_write((PTR)&nsp,1,EXTERNAL_NLIST_SIZE, abfd)
1882 != EXTERNAL_NLIST_SIZE)
1885 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1886 here, at the end. */
1890 if (! emit_stringtab (abfd, strtab))
1893 _bfd_stringtab_free (strtab);
1898 _bfd_stringtab_free (strtab);
1904 NAME(aout,get_symtab) (abfd, location)
1908 unsigned int counter = 0;
1909 aout_symbol_type *symbase;
1911 if (!NAME(aout,slurp_symbol_table)(abfd))
1914 for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
1915 *(location++) = (asymbol *)( symbase++);
1917 return bfd_get_symcount (abfd);
1921 /* Standard reloc stuff */
1922 /* Output standard relocation information to a file in target byte order. */
1925 NAME(aout,swap_std_reloc_out) (abfd, g, natptr)
1928 struct reloc_std_external *natptr;
1931 asymbol *sym = *(g->sym_ptr_ptr);
1933 unsigned int r_length;
1935 int r_baserel, r_jmptable, r_relative;
1936 asection *output_section = sym->section->output_section;
1938 PUT_WORD(abfd, g->address, natptr->r_address);
1940 r_length = g->howto->size ; /* Size as a power of two */
1941 r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
1942 /* XXX This relies on relocs coming from a.out files. */
1943 r_baserel = (g->howto->type & 8) != 0;
1944 r_jmptable = (g->howto->type & 16) != 0;
1945 r_relative = (g->howto->type & 32) != 0;
1948 /* For a standard reloc, the addend is in the object file. */
1949 r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
1952 /* name was clobbered by aout_write_syms to be symbol index */
1954 /* If this relocation is relative to a symbol then set the
1955 r_index to the symbols index, and the r_extern bit.
1957 Absolute symbols can come in in two ways, either as an offset
1958 from the abs section, or as a symbol which has an abs value.
1963 if (bfd_is_com_section (output_section)
1964 || bfd_is_abs_section (output_section)
1965 || bfd_is_und_section (output_section))
1967 if (bfd_abs_section_ptr->symbol == sym)
1969 /* Whoops, looked like an abs symbol, but is really an offset
1970 from the abs section */
1976 /* Fill in symbol */
1978 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
1984 /* Just an ordinary section */
1986 r_index = output_section->target_index;
1989 /* now the fun stuff */
1990 if (bfd_header_big_endian (abfd)) {
1991 natptr->r_index[0] = r_index >> 16;
1992 natptr->r_index[1] = r_index >> 8;
1993 natptr->r_index[2] = r_index;
1995 (r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
1996 | (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
1997 | (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
1998 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
1999 | (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
2000 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
2002 natptr->r_index[2] = r_index >> 16;
2003 natptr->r_index[1] = r_index >> 8;
2004 natptr->r_index[0] = r_index;
2006 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
2007 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
2008 | (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
2009 | (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
2010 | (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
2011 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
2016 /* Extended stuff */
2017 /* Output extended relocation information to a file in target byte order. */
2020 NAME(aout,swap_ext_reloc_out) (abfd, g, natptr)
2023 register struct reloc_ext_external *natptr;
2027 unsigned int r_type;
2028 unsigned int r_addend;
2029 asymbol *sym = *(g->sym_ptr_ptr);
2030 asection *output_section = sym->section->output_section;
2032 PUT_WORD (abfd, g->address, natptr->r_address);
2034 r_type = (unsigned int) g->howto->type;
2036 r_addend = g->addend;
2037 if ((sym->flags & BSF_SECTION_SYM) != 0)
2038 r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
2040 /* If this relocation is relative to a symbol then set the
2041 r_index to the symbols index, and the r_extern bit.
2043 Absolute symbols can come in in two ways, either as an offset
2044 from the abs section, or as a symbol which has an abs value.
2045 check for that here. */
2047 if (bfd_is_abs_section (bfd_get_section (sym)))
2052 else if ((sym->flags & BSF_SECTION_SYM) == 0)
2054 if (bfd_is_und_section (bfd_get_section (sym))
2055 || (sym->flags & BSF_GLOBAL) != 0)
2059 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
2063 /* Just an ordinary section */
2065 r_index = output_section->target_index;
2068 /* now the fun stuff */
2069 if (bfd_header_big_endian (abfd)) {
2070 natptr->r_index[0] = r_index >> 16;
2071 natptr->r_index[1] = r_index >> 8;
2072 natptr->r_index[2] = r_index;
2074 ((r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
2075 | (r_type << RELOC_EXT_BITS_TYPE_SH_BIG));
2077 natptr->r_index[2] = r_index >> 16;
2078 natptr->r_index[1] = r_index >> 8;
2079 natptr->r_index[0] = r_index;
2081 (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
2082 | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
2085 PUT_WORD (abfd, r_addend, natptr->r_addend);
2088 /* BFD deals internally with all things based from the section they're
2089 in. so, something in 10 bytes into a text section with a base of
2090 50 would have a symbol (.text+10) and know .text vma was 50.
2092 Aout keeps all it's symbols based from zero, so the symbol would
2093 contain 60. This macro subs the base of each section from the value
2094 to give the true offset from the section */
2097 #define MOVE_ADDRESS(ad) \
2099 /* undefined symbol */ \
2100 cache_ptr->sym_ptr_ptr = symbols + r_index; \
2101 cache_ptr->addend = ad; \
2103 /* defined, section relative. replace symbol with pointer to \
2104 symbol which points to section */ \
2105 switch (r_index) { \
2107 case N_TEXT | N_EXT: \
2108 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
2109 cache_ptr->addend = ad - su->textsec->vma; \
2112 case N_DATA | N_EXT: \
2113 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
2114 cache_ptr->addend = ad - su->datasec->vma; \
2117 case N_BSS | N_EXT: \
2118 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
2119 cache_ptr->addend = ad - su->bsssec->vma; \
2123 case N_ABS | N_EXT: \
2124 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
2125 cache_ptr->addend = ad; \
2131 NAME(aout,swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2133 struct reloc_ext_external *bytes;
2136 bfd_size_type symcount;
2138 unsigned int r_index;
2140 unsigned int r_type;
2141 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2143 cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
2145 /* now the fun stuff */
2146 if (bfd_header_big_endian (abfd)) {
2147 r_index = (bytes->r_index[0] << 16)
2148 | (bytes->r_index[1] << 8)
2149 | bytes->r_index[2];
2150 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
2151 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
2152 >> RELOC_EXT_BITS_TYPE_SH_BIG;
2154 r_index = (bytes->r_index[2] << 16)
2155 | (bytes->r_index[1] << 8)
2156 | bytes->r_index[0];
2157 r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
2158 r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
2159 >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
2162 cache_ptr->howto = howto_table_ext + r_type;
2164 /* Base relative relocs are always against the symbol table,
2165 regardless of the setting of r_extern. r_extern just reflects
2166 whether the symbol the reloc is against is local or global. */
2167 if (r_type == RELOC_BASE10
2168 || r_type == RELOC_BASE13
2169 || r_type == RELOC_BASE22)
2172 if (r_extern && r_index > symcount)
2174 /* We could arrange to return an error, but it might be useful
2175 to see the file even if it is bad. */
2180 MOVE_ADDRESS(GET_SWORD(abfd, bytes->r_addend));
2184 NAME(aout,swap_std_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
2186 struct reloc_std_external *bytes;
2189 bfd_size_type symcount;
2191 unsigned int r_index;
2193 unsigned int r_length;
2195 int r_baserel, r_jmptable, r_relative;
2196 struct aoutdata *su = &(abfd->tdata.aout_data->a);
2197 unsigned int howto_idx;
2199 cache_ptr->address = bfd_h_get_32 (abfd, bytes->r_address);
2201 /* now the fun stuff */
2202 if (bfd_header_big_endian (abfd)) {
2203 r_index = (bytes->r_index[0] << 16)
2204 | (bytes->r_index[1] << 8)
2205 | bytes->r_index[2];
2206 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
2207 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
2208 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
2209 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
2210 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
2211 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
2212 >> RELOC_STD_BITS_LENGTH_SH_BIG;
2214 r_index = (bytes->r_index[2] << 16)
2215 | (bytes->r_index[1] << 8)
2216 | bytes->r_index[0];
2217 r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
2218 r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
2219 r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
2220 r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
2221 r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
2222 r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
2223 >> RELOC_STD_BITS_LENGTH_SH_LITTLE;
2226 howto_idx = r_length + 4 * r_pcrel + 8 * r_baserel
2227 + 16 * r_jmptable + 32 * r_relative;
2228 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
2229 cache_ptr->howto = howto_table_std + howto_idx;
2230 BFD_ASSERT (cache_ptr->howto->type != (unsigned int) -1);
2232 /* Base relative relocs are always against the symbol table,
2233 regardless of the setting of r_extern. r_extern just reflects
2234 whether the symbol the reloc is against is local or global. */
2238 if (r_extern && r_index > symcount)
2240 /* We could arrange to return an error, but it might be useful
2241 to see the file even if it is bad. */
2249 /* Read and swap the relocs for a section. */
2252 NAME(aout,slurp_reloc_table) (abfd, asect, symbols)
2258 bfd_size_type reloc_size;
2260 arelent *reloc_cache;
2262 unsigned int counter = 0;
2265 if (asect->relocation)
2268 if (asect->flags & SEC_CONSTRUCTOR)
2271 if (asect == obj_datasec (abfd))
2272 reloc_size = exec_hdr(abfd)->a_drsize;
2273 else if (asect == obj_textsec (abfd))
2274 reloc_size = exec_hdr(abfd)->a_trsize;
2275 else if (asect == obj_bsssec (abfd))
2279 bfd_set_error (bfd_error_invalid_operation);
2283 if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
2286 each_size = obj_reloc_entry_size (abfd);
2288 count = reloc_size / each_size;
2290 reloc_cache = (arelent *) bfd_malloc ((size_t) (count * sizeof (arelent)));
2291 if (reloc_cache == NULL && count != 0)
2293 memset (reloc_cache, 0, count * sizeof (arelent));
2295 relocs = bfd_malloc ((size_t) reloc_size);
2296 if (relocs == NULL && reloc_size != 0)
2302 if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size)
2309 cache_ptr = reloc_cache;
2310 if (each_size == RELOC_EXT_SIZE)
2312 register struct reloc_ext_external *rptr =
2313 (struct reloc_ext_external *) relocs;
2315 for (; counter < count; counter++, rptr++, cache_ptr++)
2316 NAME(aout,swap_ext_reloc_in) (abfd, rptr, cache_ptr, symbols,
2317 bfd_get_symcount (abfd));
2321 register struct reloc_std_external *rptr =
2322 (struct reloc_std_external *) relocs;
2324 for (; counter < count; counter++, rptr++, cache_ptr++)
2325 MY_swap_std_reloc_in (abfd, rptr, cache_ptr, symbols,
2326 bfd_get_symcount (abfd));
2331 asect->relocation = reloc_cache;
2332 asect->reloc_count = cache_ptr - reloc_cache;
2337 /* Write out a relocation section into an object file. */
2340 NAME(aout,squirt_out_relocs) (abfd, section)
2345 unsigned char *native, *natptr;
2348 unsigned int count = section->reloc_count;
2351 if (count == 0) return true;
2353 each_size = obj_reloc_entry_size (abfd);
2354 natsize = each_size * count;
2355 native = (unsigned char *) bfd_zalloc (abfd, natsize);
2359 generic = section->orelocation;
2361 if (each_size == RELOC_EXT_SIZE)
2363 for (natptr = native;
2365 --count, natptr += each_size, ++generic)
2366 NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr);
2370 for (natptr = native;
2372 --count, natptr += each_size, ++generic)
2373 MY_swap_std_reloc_out(abfd, *generic, (struct reloc_std_external *)natptr);
2376 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
2377 bfd_release(abfd, native);
2380 bfd_release (abfd, native);
2385 /* This is stupid. This function should be a boolean predicate */
2387 NAME(aout,canonicalize_reloc) (abfd, section, relptr, symbols)
2393 arelent *tblptr = section->relocation;
2396 if (section == obj_bsssec (abfd))
2402 if (!(tblptr || NAME(aout,slurp_reloc_table)(abfd, section, symbols)))
2405 if (section->flags & SEC_CONSTRUCTOR) {
2406 arelent_chain *chain = section->constructor_chain;
2407 for (count = 0; count < section->reloc_count; count ++) {
2408 *relptr ++ = &chain->relent;
2409 chain = chain->next;
2413 tblptr = section->relocation;
2415 for (count = 0; count++ < section->reloc_count;)
2417 *relptr++ = tblptr++;
2422 return section->reloc_count;
2426 NAME(aout,get_reloc_upper_bound) (abfd, asect)
2430 if (bfd_get_format (abfd) != bfd_object) {
2431 bfd_set_error (bfd_error_invalid_operation);
2434 if (asect->flags & SEC_CONSTRUCTOR) {
2435 return (sizeof (arelent *) * (asect->reloc_count+1));
2438 if (asect == obj_datasec (abfd))
2439 return (sizeof (arelent *)
2440 * ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
2443 if (asect == obj_textsec (abfd))
2444 return (sizeof (arelent *)
2445 * ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
2448 if (asect == obj_bsssec (abfd))
2449 return sizeof (arelent *);
2451 if (asect == obj_bsssec (abfd))
2454 bfd_set_error (bfd_error_invalid_operation);
2460 NAME(aout,get_symtab_upper_bound) (abfd)
2463 if (!NAME(aout,slurp_symbol_table)(abfd))
2466 return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
2471 NAME(aout,get_lineno) (ignore_abfd, ignore_symbol)
2473 asymbol *ignore_symbol;
2475 return (alent *)NULL;
2480 NAME(aout,get_symbol_info) (ignore_abfd, symbol, ret)
2485 bfd_symbol_info (symbol, ret);
2487 if (ret->type == '?')
2489 int type_code = aout_symbol(symbol)->type & 0xff;
2490 const char *stab_name = bfd_get_stab_name (type_code);
2491 static char buf[10];
2493 if (stab_name == NULL)
2495 sprintf(buf, "(%d)", type_code);
2499 ret->stab_type = type_code;
2500 ret->stab_other = (unsigned)(aout_symbol(symbol)->other & 0xff);
2501 ret->stab_desc = (unsigned)(aout_symbol(symbol)->desc & 0xffff);
2502 ret->stab_name = stab_name;
2508 NAME(aout,print_symbol) (ignore_abfd, afile, symbol, how)
2512 bfd_print_symbol_type how;
2514 FILE *file = (FILE *)afile;
2517 case bfd_print_symbol_name:
2519 fprintf(file,"%s", symbol->name);
2521 case bfd_print_symbol_more:
2522 fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff),
2523 (unsigned)(aout_symbol(symbol)->other & 0xff),
2524 (unsigned)(aout_symbol(symbol)->type));
2526 case bfd_print_symbol_all:
2528 CONST char *section_name = symbol->section->name;
2531 bfd_print_symbol_vandf((PTR)file,symbol);
2533 fprintf(file," %-5s %04x %02x %02x",
2535 (unsigned)(aout_symbol(symbol)->desc & 0xffff),
2536 (unsigned)(aout_symbol(symbol)->other & 0xff),
2537 (unsigned)(aout_symbol(symbol)->type & 0xff));
2539 fprintf(file," %s", symbol->name);
2545 /* If we don't have to allocate more than 1MB to hold the generic
2546 symbols, we use the generic minisymbol methord: it's faster, since
2547 it only translates the symbols once, not multiple times. */
2548 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2550 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2551 symbols. The minisymbol_to_symbol function translates these into
2552 BFD asymbol structures. */
2555 NAME(aout,read_minisymbols) (abfd, dynamic, minisymsp, sizep)
2559 unsigned int *sizep;
2563 /* We could handle the dynamic symbols here as well, but it's
2564 easier to hand them off. */
2565 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2568 if (! aout_get_external_symbols (abfd))
2571 if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2572 return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
2574 *minisymsp = (PTR) obj_aout_external_syms (abfd);
2576 /* By passing the external symbols back from this routine, we are
2577 giving up control over the memory block. Clear
2578 obj_aout_external_syms, so that we do not try to free it
2580 obj_aout_external_syms (abfd) = NULL;
2582 *sizep = EXTERNAL_NLIST_SIZE;
2583 return obj_aout_external_sym_count (abfd);
2586 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2587 unmodified a.out symbol. The SYM argument is a structure returned
2588 by bfd_make_empty_symbol, which we fill in here. */
2591 NAME(aout,minisymbol_to_symbol) (abfd, dynamic, minisym, sym)
2598 || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
2599 return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
2601 memset (sym, 0, sizeof (aout_symbol_type));
2603 /* We call translate_symbol_table to translate a single symbol. */
2604 if (! (NAME(aout,translate_symbol_table)
2606 (aout_symbol_type *) sym,
2607 (struct external_nlist *) minisym,
2609 obj_aout_external_strings (abfd),
2610 obj_aout_external_string_size (abfd),
2618 provided a BFD, a section and an offset into the section, calculate
2619 and return the name of the source file and the line nearest to the
2624 NAME(aout,find_nearest_line)
2625 (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
2630 CONST char **filename_ptr;
2631 CONST char **functionname_ptr;
2632 unsigned int *line_ptr;
2634 /* Run down the file looking for the filename, function and linenumber */
2636 CONST char *directory_name = NULL;
2637 CONST char *main_file_name = NULL;
2638 CONST char *current_file_name = NULL;
2639 CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
2640 bfd_vma low_line_vma = 0;
2641 bfd_vma low_func_vma = 0;
2643 size_t filelen, funclen;
2646 *filename_ptr = abfd->filename;
2647 *functionname_ptr = 0;
2649 if (symbols != (asymbol **)NULL) {
2650 for (p = symbols; *p; p++) {
2651 aout_symbol_type *q = (aout_symbol_type *)(*p);
2655 main_file_name = current_file_name = q->symbol.name;
2656 /* Look ahead to next symbol to check if that too is an N_SO. */
2660 q = (aout_symbol_type *)(*p);
2661 if (q->type != (int)N_SO)
2664 /* Found a second N_SO First is directory; second is filename. */
2665 directory_name = current_file_name;
2666 main_file_name = current_file_name = q->symbol.name;
2667 if (obj_textsec(abfd) != section)
2671 current_file_name = q->symbol.name;
2678 /* We'll keep this if it resolves nearer than the one we have
2680 if (q->symbol.value >= low_line_vma
2681 && q->symbol.value <= offset)
2683 *line_ptr = q->desc;
2684 low_line_vma = q->symbol.value;
2685 line_file_name = current_file_name;
2690 /* We'll keep this if it is nearer than the one we have already */
2691 if (q->symbol.value >= low_func_vma &&
2692 q->symbol.value <= offset) {
2693 low_func_vma = q->symbol.value;
2694 func = (asymbol *)q;
2696 else if (q->symbol.value > offset)
2706 main_file_name = line_file_name;
2708 if (main_file_name == NULL
2709 || main_file_name[0] == '/'
2710 || directory_name == NULL)
2713 filelen = strlen (directory_name) + strlen (main_file_name);
2717 funclen = strlen (bfd_asymbol_name (func));
2719 if (adata (abfd).line_buf != NULL)
2720 free (adata (abfd).line_buf);
2721 if (filelen + funclen == 0)
2722 adata (abfd).line_buf = buf = NULL;
2725 buf = (char *) bfd_malloc (filelen + funclen + 2);
2726 adata (abfd).line_buf = buf;
2731 if (main_file_name != NULL)
2733 if (main_file_name[0] == '/' || directory_name == NULL)
2734 *filename_ptr = main_file_name;
2737 sprintf (buf, "%s%s", directory_name, main_file_name);
2738 *filename_ptr = buf;
2745 const char *function = func->name;
2748 /* The caller expects a symbol name. We actually have a
2749 function name, without the leading underscore. Put the
2750 underscore back in, so that the caller gets a symbol name. */
2751 if (bfd_get_symbol_leading_char (abfd) == '\0')
2752 strcpy (buf, function);
2755 buf[0] = bfd_get_symbol_leading_char (abfd);
2756 strcpy (buf + 1, function);
2758 /* Have to remove : stuff */
2759 p = strchr (buf, ':');
2762 *functionname_ptr = buf;
2770 NAME(aout,sizeof_headers) (abfd, execable)
2774 return adata(abfd).exec_bytes_size;
2777 /* Free all information we have cached for this BFD. We can always
2778 read it again later if we need it. */
2781 NAME(aout,bfd_free_cached_info) (abfd)
2786 if (bfd_get_format (abfd) != bfd_object)
2789 #define BFCI_FREE(x) if (x != NULL) { free (x); x = NULL; }
2790 BFCI_FREE (obj_aout_symbols (abfd));
2792 obj_aout_external_syms (abfd) = 0;
2793 bfd_free_window (&obj_aout_sym_window (abfd));
2794 bfd_free_window (&obj_aout_string_window (abfd));
2795 obj_aout_external_strings (abfd) = 0;
2797 BFCI_FREE (obj_aout_external_syms (abfd));
2798 BFCI_FREE (obj_aout_external_strings (abfd));
2800 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
2801 BFCI_FREE (o->relocation);
2807 /* a.out link code. */
2809 static boolean aout_link_add_object_symbols
2810 PARAMS ((bfd *, struct bfd_link_info *));
2811 static boolean aout_link_check_archive_element
2812 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
2813 static boolean aout_link_free_symbols PARAMS ((bfd *));
2814 static boolean aout_link_check_ar_symbols
2815 PARAMS ((bfd *, struct bfd_link_info *, boolean *pneeded));
2816 static boolean aout_link_add_symbols
2817 PARAMS ((bfd *, struct bfd_link_info *));
2819 /* Routine to create an entry in an a.out link hash table. */
2821 struct bfd_hash_entry *
2822 NAME(aout,link_hash_newfunc) (entry, table, string)
2823 struct bfd_hash_entry *entry;
2824 struct bfd_hash_table *table;
2827 struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
2829 /* Allocate the structure if it has not already been allocated by a
2831 if (ret == (struct aout_link_hash_entry *) NULL)
2832 ret = ((struct aout_link_hash_entry *)
2833 bfd_hash_allocate (table, sizeof (struct aout_link_hash_entry)));
2834 if (ret == (struct aout_link_hash_entry *) NULL)
2835 return (struct bfd_hash_entry *) ret;
2837 /* Call the allocation method of the superclass. */
2838 ret = ((struct aout_link_hash_entry *)
2839 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2843 /* Set local fields. */
2844 ret->written = false;
2848 return (struct bfd_hash_entry *) ret;
2851 /* Initialize an a.out link hash table. */
2854 NAME(aout,link_hash_table_init) (table, abfd, newfunc)
2855 struct aout_link_hash_table *table;
2857 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
2858 struct bfd_hash_table *,
2861 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
2864 /* Create an a.out link hash table. */
2866 struct bfd_link_hash_table *
2867 NAME(aout,link_hash_table_create) (abfd)
2870 struct aout_link_hash_table *ret;
2872 ret = ((struct aout_link_hash_table *)
2873 bfd_alloc (abfd, sizeof (struct aout_link_hash_table)));
2875 return (struct bfd_link_hash_table *) NULL;
2876 if (! NAME(aout,link_hash_table_init) (ret, abfd,
2877 NAME(aout,link_hash_newfunc)))
2880 return (struct bfd_link_hash_table *) NULL;
2885 /* Given an a.out BFD, add symbols to the global hash table as
2889 NAME(aout,link_add_symbols) (abfd, info)
2891 struct bfd_link_info *info;
2893 switch (bfd_get_format (abfd))
2896 return aout_link_add_object_symbols (abfd, info);
2898 return _bfd_generic_link_add_archive_symbols
2899 (abfd, info, aout_link_check_archive_element);
2901 bfd_set_error (bfd_error_wrong_format);
2906 /* Add symbols from an a.out object file. */
2909 aout_link_add_object_symbols (abfd, info)
2911 struct bfd_link_info *info;
2913 if (! aout_get_external_symbols (abfd))
2915 if (! aout_link_add_symbols (abfd, info))
2917 if (! info->keep_memory)
2919 if (! aout_link_free_symbols (abfd))
2925 /* Check a single archive element to see if we need to include it in
2926 the link. *PNEEDED is set according to whether this element is
2927 needed in the link or not. This is called from
2928 _bfd_generic_link_add_archive_symbols. */
2931 aout_link_check_archive_element (abfd, info, pneeded)
2933 struct bfd_link_info *info;
2936 if (! aout_get_external_symbols (abfd))
2939 if (! aout_link_check_ar_symbols (abfd, info, pneeded))
2944 if (! aout_link_add_symbols (abfd, info))
2948 if (! info->keep_memory || ! *pneeded)
2950 if (! aout_link_free_symbols (abfd))
2957 /* Free up the internal symbols read from an a.out file. */
2960 aout_link_free_symbols (abfd)
2963 if (obj_aout_external_syms (abfd) != (struct external_nlist *) NULL)
2966 bfd_free_window (&obj_aout_sym_window (abfd));
2968 free ((PTR) obj_aout_external_syms (abfd));
2970 obj_aout_external_syms (abfd) = (struct external_nlist *) NULL;
2972 if (obj_aout_external_strings (abfd) != (char *) NULL)
2975 bfd_free_window (&obj_aout_string_window (abfd));
2977 free ((PTR) obj_aout_external_strings (abfd));
2979 obj_aout_external_strings (abfd) = (char *) NULL;
2984 /* Look through the internal symbols to see if this object file should
2985 be included in the link. We should include this object file if it
2986 defines any symbols which are currently undefined. If this object
2987 file defines a common symbol, then we may adjust the size of the
2988 known symbol but we do not include the object file in the link
2989 (unless there is some other reason to include it). */
2992 aout_link_check_ar_symbols (abfd, info, pneeded)
2994 struct bfd_link_info *info;
2997 register struct external_nlist *p;
2998 struct external_nlist *pend;
3003 /* Look through all the symbols. */
3004 p = obj_aout_external_syms (abfd);
3005 pend = p + obj_aout_external_sym_count (abfd);
3006 strings = obj_aout_external_strings (abfd);
3007 for (; p < pend; p++)
3009 int type = bfd_h_get_8 (abfd, p->e_type);
3011 struct bfd_link_hash_entry *h;
3013 /* Ignore symbols that are not externally visible. This is an
3014 optimization only, as we check the type more thoroughly
3016 if (((type & N_EXT) == 0
3017 || (type & N_STAB) != 0
3024 if (type == N_WARNING
3030 name = strings + GET_WORD (abfd, p->e_strx);
3031 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
3033 /* We are only interested in symbols that are currently
3034 undefined or common. */
3035 if (h == (struct bfd_link_hash_entry *) NULL
3036 || (h->type != bfd_link_hash_undefined
3037 && h->type != bfd_link_hash_common))
3039 if (type == (N_INDR | N_EXT))
3044 if (type == (N_TEXT | N_EXT)
3045 || type == (N_DATA | N_EXT)
3046 || type == (N_BSS | N_EXT)
3047 || type == (N_ABS | N_EXT)
3048 || type == (N_INDR | N_EXT))
3050 /* This object file defines this symbol. We must link it
3051 in. This is true regardless of whether the current
3052 definition of the symbol is undefined or common. If the
3053 current definition is common, we have a case in which we
3054 have already seen an object file including
3056 and this object file from the archive includes
3058 In such a case we must include this object file.
3060 FIXME: The SunOS 4.1.3 linker will pull in the archive
3061 element if the symbol is defined in the .data section,
3062 but not if it is defined in the .text section. That
3063 seems a bit crazy to me, and I haven't implemented it.
3064 However, it might be correct. */
3065 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3071 if (type == (N_UNDF | N_EXT))
3075 value = GET_WORD (abfd, p->e_value);
3078 /* This symbol is common in the object from the archive
3080 if (h->type == bfd_link_hash_undefined)
3085 symbfd = h->u.undef.abfd;
3086 if (symbfd == (bfd *) NULL)
3088 /* This symbol was created as undefined from
3089 outside BFD. We assume that we should link
3090 in the object file. This is done for the -u
3091 option in the linker. */
3092 if (! (*info->callbacks->add_archive_element) (info,
3099 /* Turn the current link symbol into a common
3100 symbol. It is already on the undefs list. */
3101 h->type = bfd_link_hash_common;
3102 h->u.c.p = ((struct bfd_link_hash_common_entry *)
3103 bfd_hash_allocate (&info->hash->table,
3104 sizeof (struct bfd_link_hash_common_entry)));
3105 if (h->u.c.p == NULL)
3108 h->u.c.size = value;
3110 /* FIXME: This isn't quite right. The maximum
3111 alignment of a common symbol should be set by the
3112 architecture of the output file, not of the input
3114 power = bfd_log2 (value);
3115 if (power > bfd_get_arch_info (abfd)->section_align_power)
3116 power = bfd_get_arch_info (abfd)->section_align_power;
3117 h->u.c.p->alignment_power = power;
3119 h->u.c.p->section = bfd_make_section_old_way (symbfd,
3124 /* Adjust the size of the common symbol if
3126 if (value > h->u.c.size)
3127 h->u.c.size = value;
3137 /* This symbol is weak but defined. We must pull it in if
3138 the current link symbol is undefined, but we don't want
3139 it if the current link symbol is common. */
3140 if (h->type == bfd_link_hash_undefined)
3142 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
3150 /* We do not need this object file. */
3154 /* Add all symbols from an object file to the hash table. */
3157 aout_link_add_symbols (abfd, info)
3159 struct bfd_link_info *info;
3161 boolean (*add_one_symbol) PARAMS ((struct bfd_link_info *, bfd *,
3162 const char *, flagword, asection *,
3163 bfd_vma, const char *, boolean,
3165 struct bfd_link_hash_entry **));
3166 struct external_nlist *syms;
3167 bfd_size_type sym_count;
3170 struct aout_link_hash_entry **sym_hash;
3171 register struct external_nlist *p;
3172 struct external_nlist *pend;
3174 syms = obj_aout_external_syms (abfd);
3175 sym_count = obj_aout_external_sym_count (abfd);
3176 strings = obj_aout_external_strings (abfd);
3177 if (info->keep_memory)
3182 if ((abfd->flags & DYNAMIC) != 0
3183 && aout_backend_info (abfd)->add_dynamic_symbols != NULL)
3185 if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
3186 (abfd, info, &syms, &sym_count, &strings)))
3190 /* We keep a list of the linker hash table entries that correspond
3191 to particular symbols. We could just look them up in the hash
3192 table, but keeping the list is more efficient. Perhaps this
3193 should be conditional on info->keep_memory. */
3194 sym_hash = ((struct aout_link_hash_entry **)
3197 * sizeof (struct aout_link_hash_entry *))));
3198 if (sym_hash == NULL && sym_count != 0)
3200 obj_aout_sym_hashes (abfd) = sym_hash;
3202 add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
3203 if (add_one_symbol == NULL)
3204 add_one_symbol = _bfd_generic_link_add_one_symbol;
3207 pend = p + sym_count;
3208 for (; p < pend; p++, sym_hash++)
3219 type = bfd_h_get_8 (abfd, p->e_type);
3221 /* Ignore debugging symbols. */
3222 if ((type & N_STAB) != 0)
3225 name = strings + GET_WORD (abfd, p->e_strx);
3226 value = GET_WORD (abfd, p->e_value);
3243 /* Ignore symbols that are not externally visible. */
3246 /* Ignore local indirect symbol. */
3251 case N_UNDF | N_EXT:
3254 section = bfd_und_section_ptr;
3258 section = bfd_com_section_ptr;
3261 section = bfd_abs_section_ptr;
3263 case N_TEXT | N_EXT:
3264 section = obj_textsec (abfd);
3265 value -= bfd_get_section_vma (abfd, section);
3267 case N_DATA | N_EXT:
3268 case N_SETV | N_EXT:
3269 /* Treat N_SETV symbols as N_DATA symbol; see comment in
3270 translate_from_native_sym_flags. */
3271 section = obj_datasec (abfd);
3272 value -= bfd_get_section_vma (abfd, section);
3275 section = obj_bsssec (abfd);
3276 value -= bfd_get_section_vma (abfd, section);
3278 case N_INDR | N_EXT:
3279 /* An indirect symbol. The next symbol is the symbol
3280 which this one really is. */
3281 BFD_ASSERT (p + 1 < pend);
3283 string = strings + GET_WORD (abfd, p->e_strx);
3284 section = bfd_ind_section_ptr;
3285 flags |= BSF_INDIRECT;
3287 case N_COMM | N_EXT:
3288 section = bfd_com_section_ptr;
3290 case N_SETA: case N_SETA | N_EXT:
3291 section = bfd_abs_section_ptr;
3292 flags |= BSF_CONSTRUCTOR;
3294 case N_SETT: case N_SETT | N_EXT:
3295 section = obj_textsec (abfd);
3296 flags |= BSF_CONSTRUCTOR;
3297 value -= bfd_get_section_vma (abfd, section);
3299 case N_SETD: case N_SETD | N_EXT:
3300 section = obj_datasec (abfd);
3301 flags |= BSF_CONSTRUCTOR;
3302 value -= bfd_get_section_vma (abfd, section);
3304 case N_SETB: case N_SETB | N_EXT:
3305 section = obj_bsssec (abfd);
3306 flags |= BSF_CONSTRUCTOR;
3307 value -= bfd_get_section_vma (abfd, section);
3310 /* A warning symbol. The next symbol is the one to warn
3312 BFD_ASSERT (p + 1 < pend);
3315 name = strings + GET_WORD (abfd, p->e_strx);
3316 section = bfd_und_section_ptr;
3317 flags |= BSF_WARNING;
3320 section = bfd_und_section_ptr;
3324 section = bfd_abs_section_ptr;
3328 section = obj_textsec (abfd);
3329 value -= bfd_get_section_vma (abfd, section);
3333 section = obj_datasec (abfd);
3334 value -= bfd_get_section_vma (abfd, section);
3338 section = obj_bsssec (abfd);
3339 value -= bfd_get_section_vma (abfd, section);
3344 if (! ((*add_one_symbol)
3345 (info, abfd, name, flags, section, value, string, copy, false,
3346 (struct bfd_link_hash_entry **) sym_hash)))
3349 /* Restrict the maximum alignment of a common symbol based on
3350 the architecture, since a.out has no way to represent
3351 alignment requirements of a section in a .o file. FIXME:
3352 This isn't quite right: it should use the architecture of the
3353 output file, not the input files. */
3354 if ((*sym_hash)->root.type == bfd_link_hash_common
3355 && ((*sym_hash)->root.u.c.p->alignment_power >
3356 bfd_get_arch_info (abfd)->section_align_power))
3357 (*sym_hash)->root.u.c.p->alignment_power =
3358 bfd_get_arch_info (abfd)->section_align_power;
3360 /* If this is a set symbol, and we are not building sets, then
3361 it is possible for the hash entry to not have been set. In
3362 such a case, treat the symbol as not globally defined. */
3363 if ((*sym_hash)->root.type == bfd_link_hash_new)
3365 BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
3369 if (type == (N_INDR | N_EXT) || type == N_WARNING)
3376 /* A hash table used for header files with N_BINCL entries. */
3378 struct aout_link_includes_table
3380 struct bfd_hash_table root;
3383 /* A linked list of totals that we have found for a particular header
3386 struct aout_link_includes_totals
3388 struct aout_link_includes_totals *next;
3392 /* An entry in the header file hash table. */
3394 struct aout_link_includes_entry
3396 struct bfd_hash_entry root;
3397 /* List of totals we have found for this file. */
3398 struct aout_link_includes_totals *totals;
3401 /* Look up an entry in an the header file hash table. */
3403 #define aout_link_includes_lookup(table, string, create, copy) \
3404 ((struct aout_link_includes_entry *) \
3405 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3407 /* During the final link step we need to pass around a bunch of
3408 information, so we do it in an instance of this structure. */
3410 struct aout_final_link_info
3412 /* General link information. */
3413 struct bfd_link_info *info;
3416 /* Reloc file positions. */
3417 file_ptr treloff, dreloff;
3418 /* File position of symbols. */
3421 struct bfd_strtab_hash *strtab;
3422 /* Header file hash table. */
3423 struct aout_link_includes_table includes;
3424 /* A buffer large enough to hold the contents of any section. */
3426 /* A buffer large enough to hold the relocs of any section. */
3428 /* A buffer large enough to hold the symbol map of any input BFD. */
3430 /* A buffer large enough to hold output symbols of any input BFD. */
3431 struct external_nlist *output_syms;
3434 static struct bfd_hash_entry *aout_link_includes_newfunc
3435 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
3436 static boolean aout_link_input_bfd
3437 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3438 static boolean aout_link_write_symbols
3439 PARAMS ((struct aout_final_link_info *, bfd *input_bfd));
3440 static boolean aout_link_write_other_symbol
3441 PARAMS ((struct aout_link_hash_entry *, PTR));
3442 static boolean aout_link_input_section
3443 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3444 asection *input_section, file_ptr *reloff_ptr,
3445 bfd_size_type rel_size));
3446 static boolean aout_link_input_section_std
3447 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3448 asection *input_section, struct reloc_std_external *,
3449 bfd_size_type rel_size, bfd_byte *contents));
3450 static boolean aout_link_input_section_ext
3451 PARAMS ((struct aout_final_link_info *, bfd *input_bfd,
3452 asection *input_section, struct reloc_ext_external *,
3453 bfd_size_type rel_size, bfd_byte *contents));
3454 static INLINE asection *aout_reloc_index_to_section
3455 PARAMS ((bfd *, int));
3456 static boolean aout_link_reloc_link_order
3457 PARAMS ((struct aout_final_link_info *, asection *,
3458 struct bfd_link_order *));
3460 /* The function to create a new entry in the header file hash table. */
3462 static struct bfd_hash_entry *
3463 aout_link_includes_newfunc (entry, table, string)
3464 struct bfd_hash_entry *entry;
3465 struct bfd_hash_table *table;
3468 struct aout_link_includes_entry *ret =
3469 (struct aout_link_includes_entry *) entry;
3471 /* Allocate the structure if it has not already been allocated by a
3473 if (ret == (struct aout_link_includes_entry *) NULL)
3474 ret = ((struct aout_link_includes_entry *)
3475 bfd_hash_allocate (table,
3476 sizeof (struct aout_link_includes_entry)));
3477 if (ret == (struct aout_link_includes_entry *) NULL)
3478 return (struct bfd_hash_entry *) ret;
3480 /* Call the allocation method of the superclass. */
3481 ret = ((struct aout_link_includes_entry *)
3482 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
3485 /* Set local fields. */
3489 return (struct bfd_hash_entry *) ret;
3492 /* Do the final link step. This is called on the output BFD. The
3493 INFO structure should point to a list of BFDs linked through the
3494 link_next field which can be used to find each BFD which takes part
3495 in the output. Also, each section in ABFD should point to a list
3496 of bfd_link_order structures which list all the input sections for
3497 the output section. */
3500 NAME(aout,final_link) (abfd, info, callback)
3502 struct bfd_link_info *info;
3503 void (*callback) PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
3505 struct aout_final_link_info aout_info;
3506 boolean includes_hash_initialized = false;
3508 bfd_size_type trsize, drsize;
3509 size_t max_contents_size;
3510 size_t max_relocs_size;
3511 size_t max_sym_count;
3512 bfd_size_type text_size;
3514 register struct bfd_link_order *p;
3516 boolean have_link_order_relocs;
3519 abfd->flags |= DYNAMIC;
3521 aout_info.info = info;
3522 aout_info.output_bfd = abfd;
3523 aout_info.contents = NULL;
3524 aout_info.relocs = NULL;
3525 aout_info.symbol_map = NULL;
3526 aout_info.output_syms = NULL;
3528 if (! bfd_hash_table_init_n (&aout_info.includes.root,
3529 aout_link_includes_newfunc,
3532 includes_hash_initialized = true;
3534 /* Figure out the largest section size. Also, if generating
3535 relocateable output, count the relocs. */
3538 max_contents_size = 0;
3539 max_relocs_size = 0;
3541 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3545 if (info->relocateable)
3547 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3549 trsize += exec_hdr (sub)->a_trsize;
3550 drsize += exec_hdr (sub)->a_drsize;
3554 /* FIXME: We need to identify the .text and .data sections
3555 and call get_reloc_upper_bound and canonicalize_reloc to
3556 work out the number of relocs needed, and then multiply
3557 by the reloc size. */
3558 (*_bfd_error_handler)
3559 ("%s: relocateable link from %s to %s not supported",
3560 bfd_get_filename (abfd),
3561 sub->xvec->name, abfd->xvec->name);
3562 bfd_set_error (bfd_error_invalid_operation);
3567 if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
3569 sz = bfd_section_size (sub, obj_textsec (sub));
3570 if (sz > max_contents_size)
3571 max_contents_size = sz;
3572 sz = bfd_section_size (sub, obj_datasec (sub));
3573 if (sz > max_contents_size)
3574 max_contents_size = sz;
3576 sz = exec_hdr (sub)->a_trsize;
3577 if (sz > max_relocs_size)
3578 max_relocs_size = sz;
3579 sz = exec_hdr (sub)->a_drsize;
3580 if (sz > max_relocs_size)
3581 max_relocs_size = sz;
3583 sz = obj_aout_external_sym_count (sub);
3584 if (sz > max_sym_count)
3589 if (info->relocateable)
3591 if (obj_textsec (abfd) != (asection *) NULL)
3592 trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
3594 * obj_reloc_entry_size (abfd));
3595 if (obj_datasec (abfd) != (asection *) NULL)
3596 drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
3598 * obj_reloc_entry_size (abfd));
3601 exec_hdr (abfd)->a_trsize = trsize;
3602 exec_hdr (abfd)->a_drsize = drsize;
3604 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
3606 /* Adjust the section sizes and vmas according to the magic number.
3607 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3608 filepos for each section. */
3609 if (! NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end))
3612 /* The relocation and symbol file positions differ among a.out
3613 targets. We are passed a callback routine from the backend
3614 specific code to handle this.
3615 FIXME: At this point we do not know how much space the symbol
3616 table will require. This will not work for any (nonstandard)
3617 a.out target that needs to know the symbol table size before it
3618 can compute the relocation file positions. This may or may not
3619 be the case for the hp300hpux target, for example. */
3620 (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
3622 obj_textsec (abfd)->rel_filepos = aout_info.treloff;
3623 obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
3624 obj_sym_filepos (abfd) = aout_info.symoff;
3626 /* We keep a count of the symbols as we output them. */
3627 obj_aout_external_sym_count (abfd) = 0;
3629 /* We accumulate the string table as we write out the symbols. */
3630 aout_info.strtab = _bfd_stringtab_init ();
3631 if (aout_info.strtab == NULL)
3634 /* Allocate buffers to hold section contents and relocs. */
3635 aout_info.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3636 aout_info.relocs = (PTR) bfd_malloc (max_relocs_size);
3637 aout_info.symbol_map = (int *) bfd_malloc (max_sym_count * sizeof (int *));
3638 aout_info.output_syms = ((struct external_nlist *)
3639 bfd_malloc ((max_sym_count + 1)
3640 * sizeof (struct external_nlist)));
3641 if ((aout_info.contents == NULL && max_contents_size != 0)
3642 || (aout_info.relocs == NULL && max_relocs_size != 0)
3643 || (aout_info.symbol_map == NULL && max_sym_count != 0)
3644 || aout_info.output_syms == NULL)
3647 /* If we have a symbol named __DYNAMIC, force it out now. This is
3648 required by SunOS. Doing this here rather than in sunos.c is a
3649 hack, but it's easier than exporting everything which would be
3652 struct aout_link_hash_entry *h;
3654 h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
3655 false, false, false);
3657 aout_link_write_other_symbol (h, &aout_info);
3660 /* The most time efficient way to do the link would be to read all
3661 the input object files into memory and then sort out the
3662 information into the output file. Unfortunately, that will
3663 probably use too much memory. Another method would be to step
3664 through everything that composes the text section and write it
3665 out, and then everything that composes the data section and write
3666 it out, and then write out the relocs, and then write out the
3667 symbols. Unfortunately, that requires reading stuff from each
3668 input file several times, and we will not be able to keep all the
3669 input files open simultaneously, and reopening them will be slow.
3671 What we do is basically process one input file at a time. We do
3672 everything we need to do with an input file once--copy over the
3673 section contents, handle the relocation information, and write
3674 out the symbols--and then we throw away the information we read
3675 from it. This approach requires a lot of lseeks of the output
3676 file, which is unfortunate but still faster than reopening a lot
3679 We use the output_has_begun field of the input BFDs to see
3680 whether we have already handled it. */
3681 for (sub = info->input_bfds; sub != (bfd *) NULL; sub = sub->link_next)
3682 sub->output_has_begun = false;
3684 /* Mark all sections which are to be included in the link. This
3685 will normally be every section. We need to do this so that we
3686 can identify any sections which the linker has decided to not
3688 for (o = abfd->sections; o != NULL; o = o->next)
3690 for (p = o->link_order_head; p != NULL; p = p->next)
3692 if (p->type == bfd_indirect_link_order)
3693 p->u.indirect.section->linker_mark = true;
3697 have_link_order_relocs = false;
3698 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3700 for (p = o->link_order_head;
3701 p != (struct bfd_link_order *) NULL;
3704 if (p->type == bfd_indirect_link_order
3705 && (bfd_get_flavour (p->u.indirect.section->owner)
3706 == bfd_target_aout_flavour))
3710 input_bfd = p->u.indirect.section->owner;
3711 if (! input_bfd->output_has_begun)
3713 if (! aout_link_input_bfd (&aout_info, input_bfd))
3715 input_bfd->output_has_begun = true;
3718 else if (p->type == bfd_section_reloc_link_order
3719 || p->type == bfd_symbol_reloc_link_order)
3721 /* These are handled below. */
3722 have_link_order_relocs = true;
3726 if (! _bfd_default_link_order (abfd, info, o, p))
3732 /* Write out any symbols that we have not already written out. */
3733 aout_link_hash_traverse (aout_hash_table (info),
3734 aout_link_write_other_symbol,
3737 /* Now handle any relocs we were asked to create by the linker.
3738 These did not come from any input file. We must do these after
3739 we have written out all the symbols, so that we know the symbol
3741 if (have_link_order_relocs)
3743 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3745 for (p = o->link_order_head;
3746 p != (struct bfd_link_order *) NULL;
3749 if (p->type == bfd_section_reloc_link_order
3750 || p->type == bfd_symbol_reloc_link_order)
3752 if (! aout_link_reloc_link_order (&aout_info, o, p))
3759 if (aout_info.contents != NULL)
3761 free (aout_info.contents);
3762 aout_info.contents = NULL;
3764 if (aout_info.relocs != NULL)
3766 free (aout_info.relocs);
3767 aout_info.relocs = NULL;
3769 if (aout_info.symbol_map != NULL)
3771 free (aout_info.symbol_map);
3772 aout_info.symbol_map = NULL;
3774 if (aout_info.output_syms != NULL)
3776 free (aout_info.output_syms);
3777 aout_info.output_syms = NULL;
3779 if (includes_hash_initialized)
3781 bfd_hash_table_free (&aout_info.includes.root);
3782 includes_hash_initialized = false;
3785 /* Finish up any dynamic linking we may be doing. */
3786 if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
3788 if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
3792 /* Update the header information. */
3793 abfd->symcount = obj_aout_external_sym_count (abfd);
3794 exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
3795 obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
3796 obj_textsec (abfd)->reloc_count =
3797 exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
3798 obj_datasec (abfd)->reloc_count =
3799 exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
3801 /* Write out the string table. */
3802 if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0)
3804 return emit_stringtab (abfd, aout_info.strtab);
3807 if (aout_info.contents != NULL)
3808 free (aout_info.contents);
3809 if (aout_info.relocs != NULL)
3810 free (aout_info.relocs);
3811 if (aout_info.symbol_map != NULL)
3812 free (aout_info.symbol_map);
3813 if (aout_info.output_syms != NULL)
3814 free (aout_info.output_syms);
3815 if (includes_hash_initialized)
3816 bfd_hash_table_free (&aout_info.includes.root);
3820 /* Link an a.out input BFD into the output file. */
3823 aout_link_input_bfd (finfo, input_bfd)
3824 struct aout_final_link_info *finfo;
3827 bfd_size_type sym_count;
3829 BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
3831 /* If this is a dynamic object, it may need special handling. */
3832 if ((input_bfd->flags & DYNAMIC) != 0
3833 && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
3835 return ((*aout_backend_info (input_bfd)->link_dynamic_object)
3836 (finfo->info, input_bfd));
3839 /* Get the symbols. We probably have them already, unless
3840 finfo->info->keep_memory is false. */
3841 if (! aout_get_external_symbols (input_bfd))
3844 sym_count = obj_aout_external_sym_count (input_bfd);
3846 /* Write out the symbols and get a map of the new indices. The map
3847 is placed into finfo->symbol_map. */
3848 if (! aout_link_write_symbols (finfo, input_bfd))
3851 /* Relocate and write out the sections. These functions use the
3852 symbol map created by aout_link_write_symbols. The linker_mark
3853 field will be set if these sections are to be included in the
3854 link, which will normally be the case. */
3855 if (obj_textsec (input_bfd)->linker_mark)
3857 if (! aout_link_input_section (finfo, input_bfd,
3858 obj_textsec (input_bfd),
3860 exec_hdr (input_bfd)->a_trsize))
3863 if (obj_datasec (input_bfd)->linker_mark)
3865 if (! aout_link_input_section (finfo, input_bfd,
3866 obj_datasec (input_bfd),
3868 exec_hdr (input_bfd)->a_drsize))
3872 /* If we are not keeping memory, we don't need the symbols any
3873 longer. We still need them if we are keeping memory, because the
3874 strings in the hash table point into them. */
3875 if (! finfo->info->keep_memory)
3877 if (! aout_link_free_symbols (input_bfd))
3884 /* Adjust and write out the symbols for an a.out file. Set the new
3885 symbol indices into a symbol_map. */
3888 aout_link_write_symbols (finfo, input_bfd)
3889 struct aout_final_link_info *finfo;
3893 bfd_size_type sym_count;
3895 enum bfd_link_strip strip;
3896 enum bfd_link_discard discard;
3897 struct external_nlist *outsym;
3898 bfd_size_type strtab_index;
3899 register struct external_nlist *sym;
3900 struct external_nlist *sym_end;
3901 struct aout_link_hash_entry **sym_hash;
3906 output_bfd = finfo->output_bfd;
3907 sym_count = obj_aout_external_sym_count (input_bfd);
3908 strings = obj_aout_external_strings (input_bfd);
3909 strip = finfo->info->strip;
3910 discard = finfo->info->discard;
3911 outsym = finfo->output_syms;
3913 /* First write out a symbol for this object file, unless we are
3914 discarding such symbols. */
3915 if (strip != strip_all
3916 && (strip != strip_some
3917 || bfd_hash_lookup (finfo->info->keep_hash, input_bfd->filename,
3918 false, false) != NULL)
3919 && discard != discard_all)
3921 bfd_h_put_8 (output_bfd, N_TEXT, outsym->e_type);
3922 bfd_h_put_8 (output_bfd, 0, outsym->e_other);
3923 bfd_h_put_16 (output_bfd, (bfd_vma) 0, outsym->e_desc);
3924 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
3925 input_bfd->filename, false);
3926 if (strtab_index == (bfd_size_type) -1)
3928 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
3929 PUT_WORD (output_bfd,
3930 (bfd_get_section_vma (output_bfd,
3931 obj_textsec (input_bfd)->output_section)
3932 + obj_textsec (input_bfd)->output_offset),
3934 ++obj_aout_external_sym_count (output_bfd);
3940 sym = obj_aout_external_syms (input_bfd);
3941 sym_end = sym + sym_count;
3942 sym_hash = obj_aout_sym_hashes (input_bfd);
3943 symbol_map = finfo->symbol_map;
3944 memset (symbol_map, 0, sym_count * sizeof *symbol_map);
3945 for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
3949 struct aout_link_hash_entry *h;
3955 /* We set *symbol_map to 0 above for all symbols. If it has
3956 already been set to -1 for this symbol, it means that we are
3957 discarding it because it appears in a duplicate header file.
3958 See the N_BINCL code below. */
3959 if (*symbol_map == -1)
3962 /* Initialize *symbol_map to -1, which means that the symbol was
3963 not copied into the output file. We will change it later if
3964 we do copy the symbol over. */
3967 type = bfd_h_get_8 (input_bfd, sym->e_type);
3968 name = strings + GET_WORD (input_bfd, sym->e_strx);
3974 /* Pass this symbol through. It is the target of an
3975 indirect or warning symbol. */
3976 val = GET_WORD (input_bfd, sym->e_value);
3981 /* Skip this symbol, which is the target of an indirect
3982 symbol that we have changed to no longer be an indirect
3989 struct aout_link_hash_entry *hresolve;
3991 /* We have saved the hash table entry for this symbol, if
3992 there is one. Note that we could just look it up again
3993 in the hash table, provided we first check that it is an
3997 /* Use the name from the hash table, in case the symbol was
4000 name = h->root.root.string;
4002 /* If this is an indirect or warning symbol, then change
4003 hresolve to the base symbol. We also change *sym_hash so
4004 that the relocation routines relocate against the real
4007 if (h != (struct aout_link_hash_entry *) NULL
4008 && (h->root.type == bfd_link_hash_indirect
4009 || h->root.type == bfd_link_hash_warning))
4011 hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
4012 while (hresolve->root.type == bfd_link_hash_indirect
4013 || hresolve->root.type == bfd_link_hash_warning)
4014 hresolve = ((struct aout_link_hash_entry *)
4015 hresolve->root.u.i.link);
4016 *sym_hash = hresolve;
4019 /* If the symbol has already been written out, skip it. */
4020 if (h != (struct aout_link_hash_entry *) NULL
4021 && h->root.type != bfd_link_hash_warning
4024 if ((type & N_TYPE) == N_INDR
4025 || type == N_WARNING)
4027 *symbol_map = h->indx;
4031 /* See if we are stripping this symbol. */
4037 case strip_debugger:
4038 if ((type & N_STAB) != 0)
4042 if (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
4052 if (h != (struct aout_link_hash_entry *) NULL)
4057 /* Get the value of the symbol. */
4058 if ((type & N_TYPE) == N_TEXT
4060 symsec = obj_textsec (input_bfd);
4061 else if ((type & N_TYPE) == N_DATA
4063 symsec = obj_datasec (input_bfd);
4064 else if ((type & N_TYPE) == N_BSS
4066 symsec = obj_bsssec (input_bfd);
4067 else if ((type & N_TYPE) == N_ABS
4069 symsec = bfd_abs_section_ptr;
4070 else if (((type & N_TYPE) == N_INDR
4071 && (hresolve == (struct aout_link_hash_entry *) NULL
4072 || (hresolve->root.type != bfd_link_hash_defined
4073 && hresolve->root.type != bfd_link_hash_defweak
4074 && hresolve->root.type != bfd_link_hash_common)))
4075 || type == N_WARNING)
4077 /* Pass the next symbol through unchanged. The
4078 condition above for indirect symbols is so that if
4079 the indirect symbol was defined, we output it with
4080 the correct definition so the debugger will
4083 val = GET_WORD (input_bfd, sym->e_value);
4086 else if ((type & N_STAB) != 0)
4088 val = GET_WORD (input_bfd, sym->e_value);
4093 /* If we get here with an indirect symbol, it means that
4094 we are outputting it with a real definition. In such
4095 a case we do not want to output the next symbol,
4096 which is the target of the indirection. */
4097 if ((type & N_TYPE) == N_INDR)
4102 /* We need to get the value from the hash table. We use
4103 hresolve so that if we have defined an indirect
4104 symbol we output the final definition. */
4105 if (h == (struct aout_link_hash_entry *) NULL)
4107 switch (type & N_TYPE)
4110 symsec = obj_textsec (input_bfd);
4113 symsec = obj_datasec (input_bfd);
4116 symsec = obj_bsssec (input_bfd);
4119 symsec = bfd_abs_section_ptr;
4126 else if (hresolve->root.type == bfd_link_hash_defined
4127 || hresolve->root.type == bfd_link_hash_defweak)
4129 asection *input_section;
4130 asection *output_section;
4132 /* This case usually means a common symbol which was
4133 turned into a defined symbol. */
4134 input_section = hresolve->root.u.def.section;
4135 output_section = input_section->output_section;
4136 BFD_ASSERT (bfd_is_abs_section (output_section)
4137 || output_section->owner == output_bfd);
4138 val = (hresolve->root.u.def.value
4139 + bfd_get_section_vma (output_bfd, output_section)
4140 + input_section->output_offset);
4142 /* Get the correct type based on the section. If
4143 this is a constructed set, force it to be
4144 globally visible. */
4153 if (output_section == obj_textsec (output_bfd))
4154 type |= (hresolve->root.type == bfd_link_hash_defined
4157 else if (output_section == obj_datasec (output_bfd))
4158 type |= (hresolve->root.type == bfd_link_hash_defined
4161 else if (output_section == obj_bsssec (output_bfd))
4162 type |= (hresolve->root.type == bfd_link_hash_defined
4166 type |= (hresolve->root.type == bfd_link_hash_defined
4170 else if (hresolve->root.type == bfd_link_hash_common)
4171 val = hresolve->root.u.c.size;
4172 else if (hresolve->root.type == bfd_link_hash_undefweak)
4180 if (symsec != (asection *) NULL)
4181 val = (symsec->output_section->vma
4182 + symsec->output_offset
4183 + (GET_WORD (input_bfd, sym->e_value)
4186 /* If this is a global symbol set the written flag, and if
4187 it is a local symbol see if we should discard it. */
4188 if (h != (struct aout_link_hash_entry *) NULL)
4191 h->indx = obj_aout_external_sym_count (output_bfd);
4193 else if ((type & N_TYPE) != N_SETT
4194 && (type & N_TYPE) != N_SETD
4195 && (type & N_TYPE) != N_SETB
4196 && (type & N_TYPE) != N_SETA)
4203 if (*name == *finfo->info->lprefix
4204 && (finfo->info->lprefix_len == 1
4205 || strncmp (name, finfo->info->lprefix,
4206 finfo->info->lprefix_len) == 0))
4220 /* An N_BINCL symbol indicates the start of the stabs
4221 entries for a header file. We need to scan ahead to the
4222 next N_EINCL symbol, ignoring nesting, adding up all the
4223 characters in the symbol names, not including the file
4224 numbers in types (the first number after an open
4226 if (type == N_BINCL)
4228 struct external_nlist *incl_sym;
4230 struct aout_link_includes_entry *incl_entry;
4231 struct aout_link_includes_totals *t;
4235 for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
4239 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4240 if (incl_type == N_EINCL)
4246 else if (incl_type == N_BINCL)
4252 s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
4253 for (; *s != '\0'; s++)
4258 /* Skip the file number. */
4260 while (isdigit ((unsigned char) *s))
4268 /* If we have already included a header file with the
4269 same value, then replace this one with an N_EXCL
4271 copy = ! finfo->info->keep_memory;
4272 incl_entry = aout_link_includes_lookup (&finfo->includes,
4274 if (incl_entry == NULL)
4276 for (t = incl_entry->totals; t != NULL; t = t->next)
4277 if (t->total == val)
4281 /* This is the first time we have seen this header
4282 file with this set of stabs strings. */
4283 t = ((struct aout_link_includes_totals *)
4284 bfd_hash_allocate (&finfo->includes.root,
4289 t->next = incl_entry->totals;
4290 incl_entry->totals = t;
4296 /* This is a duplicate header file. We must change
4297 it to be an N_EXCL entry, and mark all the
4298 included symbols to prevent outputting them. */
4302 for (incl_sym = sym + 1, incl_map = symbol_map + 1;
4304 incl_sym++, incl_map++)
4308 incl_type = bfd_h_get_8 (input_bfd, incl_sym->e_type);
4309 if (incl_type == N_EINCL)
4318 else if (incl_type == N_BINCL)
4327 /* Copy this symbol into the list of symbols we are going to
4329 bfd_h_put_8 (output_bfd, type, outsym->e_type);
4330 bfd_h_put_8 (output_bfd, bfd_h_get_8 (input_bfd, sym->e_other),
4332 bfd_h_put_16 (output_bfd, bfd_h_get_16 (input_bfd, sym->e_desc),
4335 if (! finfo->info->keep_memory)
4337 /* name points into a string table which we are going to
4338 free. If there is a hash table entry, use that string.
4339 Otherwise, copy name into memory. */
4340 if (h != (struct aout_link_hash_entry *) NULL)
4341 name = h->root.root.string;
4345 strtab_index = add_to_stringtab (output_bfd, finfo->strtab,
4347 if (strtab_index == (bfd_size_type) -1)
4349 PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
4350 PUT_WORD (output_bfd, val, outsym->e_value);
4351 *symbol_map = obj_aout_external_sym_count (output_bfd);
4352 ++obj_aout_external_sym_count (output_bfd);
4356 /* Write out the output symbols we have just constructed. */
4357 if (outsym > finfo->output_syms)
4359 bfd_size_type outsym_count;
4361 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0)
4363 outsym_count = outsym - finfo->output_syms;
4364 if (bfd_write ((PTR) finfo->output_syms,
4365 (bfd_size_type) EXTERNAL_NLIST_SIZE,
4366 (bfd_size_type) outsym_count, output_bfd)
4367 != outsym_count * EXTERNAL_NLIST_SIZE)
4369 finfo->symoff += outsym_count * EXTERNAL_NLIST_SIZE;
4375 /* Write out a symbol that was not associated with an a.out input
4379 aout_link_write_other_symbol (h, data)
4380 struct aout_link_hash_entry *h;
4383 struct aout_final_link_info *finfo = (struct aout_final_link_info *) data;
4387 struct external_nlist outsym;
4390 output_bfd = finfo->output_bfd;
4392 if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
4394 if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
4395 (output_bfd, finfo->info, h)))
4397 /* FIXME: No way to handle errors. */
4407 /* An indx of -2 means the symbol must be written. */
4409 && (finfo->info->strip == strip_all
4410 || (finfo->info->strip == strip_some
4411 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
4412 false, false) == NULL)))
4415 switch (h->root.type)
4419 /* Avoid variable not initialized warnings. */
4421 case bfd_link_hash_new:
4422 /* This can happen for set symbols when sets are not being
4425 case bfd_link_hash_undefined:
4426 type = N_UNDF | N_EXT;
4429 case bfd_link_hash_defined:
4430 case bfd_link_hash_defweak:
4434 sec = h->root.u.def.section->output_section;
4435 BFD_ASSERT (bfd_is_abs_section (sec)
4436 || sec->owner == output_bfd);
4437 if (sec == obj_textsec (output_bfd))
4438 type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
4439 else if (sec == obj_datasec (output_bfd))
4440 type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
4441 else if (sec == obj_bsssec (output_bfd))
4442 type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
4444 type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
4446 val = (h->root.u.def.value
4448 + h->root.u.def.section->output_offset);
4451 case bfd_link_hash_common:
4452 type = N_UNDF | N_EXT;
4453 val = h->root.u.c.size;
4455 case bfd_link_hash_undefweak:
4458 case bfd_link_hash_indirect:
4459 case bfd_link_hash_warning:
4460 /* FIXME: Ignore these for now. The circumstances under which
4461 they should be written out are not clear to me. */
4465 bfd_h_put_8 (output_bfd, type, outsym.e_type);
4466 bfd_h_put_8 (output_bfd, 0, outsym.e_other);
4467 bfd_h_put_16 (output_bfd, 0, outsym.e_desc);
4468 indx = add_to_stringtab (output_bfd, finfo->strtab, h->root.root.string,
4470 if (indx == (bfd_size_type) -1)
4472 /* FIXME: No way to handle errors. */
4475 PUT_WORD (output_bfd, indx, outsym.e_strx);
4476 PUT_WORD (output_bfd, val, outsym.e_value);
4478 if (bfd_seek (output_bfd, finfo->symoff, SEEK_SET) != 0
4479 || bfd_write ((PTR) &outsym, (bfd_size_type) EXTERNAL_NLIST_SIZE,
4480 (bfd_size_type) 1, output_bfd) != EXTERNAL_NLIST_SIZE)
4482 /* FIXME: No way to handle errors. */
4486 finfo->symoff += EXTERNAL_NLIST_SIZE;
4487 h->indx = obj_aout_external_sym_count (output_bfd);
4488 ++obj_aout_external_sym_count (output_bfd);
4493 /* Link an a.out section into the output file. */
4496 aout_link_input_section (finfo, input_bfd, input_section, reloff_ptr,
4498 struct aout_final_link_info *finfo;
4500 asection *input_section;
4501 file_ptr *reloff_ptr;
4502 bfd_size_type rel_size;
4504 bfd_size_type input_size;
4507 /* Get the section contents. */
4508 input_size = bfd_section_size (input_bfd, input_section);
4509 if (! bfd_get_section_contents (input_bfd, input_section,
4510 (PTR) finfo->contents,
4511 (file_ptr) 0, input_size))
4514 /* Read in the relocs if we haven't already done it. */
4515 if (aout_section_data (input_section) != NULL
4516 && aout_section_data (input_section)->relocs != NULL)
4517 relocs = aout_section_data (input_section)->relocs;
4520 relocs = finfo->relocs;
4523 if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
4524 || bfd_read (relocs, 1, rel_size, input_bfd) != rel_size)
4529 /* Relocate the section contents. */
4530 if (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE)
4532 if (! aout_link_input_section_std (finfo, input_bfd, input_section,
4533 (struct reloc_std_external *) relocs,
4534 rel_size, finfo->contents))
4539 if (! aout_link_input_section_ext (finfo, input_bfd, input_section,
4540 (struct reloc_ext_external *) relocs,
4541 rel_size, finfo->contents))
4545 /* Write out the section contents. */
4546 if (! bfd_set_section_contents (finfo->output_bfd,
4547 input_section->output_section,
4548 (PTR) finfo->contents,
4549 input_section->output_offset,
4553 /* If we are producing relocateable output, the relocs were
4554 modified, and we now write them out. */
4555 if (finfo->info->relocateable && rel_size > 0)
4557 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
4559 if (bfd_write (relocs, (bfd_size_type) 1, rel_size, finfo->output_bfd)
4562 *reloff_ptr += rel_size;
4564 /* Assert that the relocs have not run into the symbols, and
4565 that if these are the text relocs they have not run into the
4567 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
4568 && (reloff_ptr != &finfo->treloff
4570 <= obj_datasec (finfo->output_bfd)->rel_filepos)));
4576 /* Get the section corresponding to a reloc index. */
4578 static INLINE asection *
4579 aout_reloc_index_to_section (abfd, indx)
4583 switch (indx & N_TYPE)
4586 return obj_textsec (abfd);
4588 return obj_datasec (abfd);
4590 return obj_bsssec (abfd);
4593 return bfd_abs_section_ptr;
4599 /* Relocate an a.out section using standard a.out relocs. */
4602 aout_link_input_section_std (finfo, input_bfd, input_section, relocs,
4604 struct aout_final_link_info *finfo;
4606 asection *input_section;
4607 struct reloc_std_external *relocs;
4608 bfd_size_type rel_size;
4611 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4613 struct aout_link_hash_entry *,
4614 PTR, bfd_byte *, boolean *,
4617 boolean relocateable;
4618 struct external_nlist *syms;
4620 struct aout_link_hash_entry **sym_hashes;
4622 bfd_size_type reloc_count;
4623 register struct reloc_std_external *rel;
4624 struct reloc_std_external *rel_end;
4626 output_bfd = finfo->output_bfd;
4627 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4629 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_STD_SIZE);
4630 BFD_ASSERT (input_bfd->xvec->header_byteorder
4631 == output_bfd->xvec->header_byteorder);
4633 relocateable = finfo->info->relocateable;
4634 syms = obj_aout_external_syms (input_bfd);
4635 strings = obj_aout_external_strings (input_bfd);
4636 sym_hashes = obj_aout_sym_hashes (input_bfd);
4637 symbol_map = finfo->symbol_map;
4639 reloc_count = rel_size / RELOC_STD_SIZE;
4641 rel_end = rel + reloc_count;
4642 for (; rel < rel_end; rel++)
4649 reloc_howto_type *howto;
4650 struct aout_link_hash_entry *h = NULL;
4652 bfd_reloc_status_type r;
4654 r_addr = GET_SWORD (input_bfd, rel->r_address);
4656 #ifdef MY_reloc_howto
4657 howto = MY_reloc_howto(input_bfd, rel, r_index, r_extern, r_pcrel);
4663 unsigned int howto_idx;
4665 if (bfd_header_big_endian (input_bfd))
4667 r_index = ((rel->r_index[0] << 16)
4668 | (rel->r_index[1] << 8)
4670 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
4671 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
4672 r_baserel = (0 != (rel->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
4673 r_jmptable= (0 != (rel->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
4674 r_relative= (0 != (rel->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
4675 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
4676 >> RELOC_STD_BITS_LENGTH_SH_BIG);
4680 r_index = ((rel->r_index[2] << 16)
4681 | (rel->r_index[1] << 8)
4683 r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
4684 r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
4685 r_baserel = (0 != (rel->r_type[0]
4686 & RELOC_STD_BITS_BASEREL_LITTLE));
4687 r_jmptable= (0 != (rel->r_type[0]
4688 & RELOC_STD_BITS_JMPTABLE_LITTLE));
4689 r_relative= (0 != (rel->r_type[0]
4690 & RELOC_STD_BITS_RELATIVE_LITTLE));
4691 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
4692 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
4695 howto_idx = (r_length + 4 * r_pcrel + 8 * r_baserel
4696 + 16 * r_jmptable + 32 * r_relative);
4697 BFD_ASSERT (howto_idx < TABLE_SIZE (howto_table_std));
4698 howto = howto_table_std + howto_idx;
4704 /* We are generating a relocateable output file, and must
4705 modify the reloc accordingly. */
4708 /* If we know the symbol this relocation is against,
4709 convert it into a relocation against a section. This
4710 is what the native linker does. */
4711 h = sym_hashes[r_index];
4712 if (h != (struct aout_link_hash_entry *) NULL
4713 && (h->root.type == bfd_link_hash_defined
4714 || h->root.type == bfd_link_hash_defweak))
4716 asection *output_section;
4718 /* Change the r_extern value. */
4719 if (bfd_header_big_endian (output_bfd))
4720 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_BIG;
4722 rel->r_type[0] &=~ RELOC_STD_BITS_EXTERN_LITTLE;
4724 /* Compute a new r_index. */
4725 output_section = h->root.u.def.section->output_section;
4726 if (output_section == obj_textsec (output_bfd))
4728 else if (output_section == obj_datasec (output_bfd))
4730 else if (output_section == obj_bsssec (output_bfd))
4735 /* Add the symbol value and the section VMA to the
4736 addend stored in the contents. */
4737 relocation = (h->root.u.def.value
4738 + output_section->vma
4739 + h->root.u.def.section->output_offset);
4743 /* We must change r_index according to the symbol
4745 r_index = symbol_map[r_index];
4751 /* We decided to strip this symbol, but it
4752 turns out that we can't. Note that we
4753 lose the other and desc information here.
4754 I don't think that will ever matter for a
4760 if (! aout_link_write_other_symbol (h,
4770 name = strings + GET_WORD (input_bfd,
4771 syms[r_index].e_strx);
4772 if (! ((*finfo->info->callbacks->unattached_reloc)
4773 (finfo->info, name, input_bfd, input_section,
4783 /* Write out the new r_index value. */
4784 if (bfd_header_big_endian (output_bfd))
4786 rel->r_index[0] = r_index >> 16;
4787 rel->r_index[1] = r_index >> 8;
4788 rel->r_index[2] = r_index;
4792 rel->r_index[2] = r_index >> 16;
4793 rel->r_index[1] = r_index >> 8;
4794 rel->r_index[0] = r_index;
4801 /* This is a relocation against a section. We must
4802 adjust by the amount that the section moved. */
4803 section = aout_reloc_index_to_section (input_bfd, r_index);
4804 relocation = (section->output_section->vma
4805 + section->output_offset
4809 /* Change the address of the relocation. */
4810 PUT_WORD (output_bfd,
4811 r_addr + input_section->output_offset,
4814 /* Adjust a PC relative relocation by removing the reference
4815 to the original address in the section and including the
4816 reference to the new address. */
4818 relocation -= (input_section->output_section->vma
4819 + input_section->output_offset
4820 - input_section->vma);
4822 #ifdef MY_relocatable_reloc
4823 MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
4826 if (relocation == 0)
4829 r = MY_relocate_contents (howto,
4830 input_bfd, relocation,
4837 /* We are generating an executable, and must do a full
4842 h = sym_hashes[r_index];
4844 if (h != (struct aout_link_hash_entry *) NULL
4845 && (h->root.type == bfd_link_hash_defined
4846 || h->root.type == bfd_link_hash_defweak))
4848 relocation = (h->root.u.def.value
4849 + h->root.u.def.section->output_section->vma
4850 + h->root.u.def.section->output_offset);
4852 else if (h != (struct aout_link_hash_entry *) NULL
4853 && h->root.type == bfd_link_hash_undefweak)
4865 section = aout_reloc_index_to_section (input_bfd, r_index);
4866 relocation = (section->output_section->vma
4867 + section->output_offset
4870 relocation += input_section->vma;
4873 if (check_dynamic_reloc != NULL)
4877 if (! ((*check_dynamic_reloc)
4878 (finfo->info, input_bfd, input_section, h,
4879 (PTR) rel, contents, &skip, &relocation)))
4885 /* Now warn if a global symbol is undefined. We could not
4886 do this earlier, because check_dynamic_reloc might want
4887 to skip this reloc. */
4888 if (hundef && ! finfo->info->shared && ! r_baserel)
4893 name = h->root.root.string;
4895 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
4896 if (! ((*finfo->info->callbacks->undefined_symbol)
4897 (finfo->info, name, input_bfd, input_section, r_addr)))
4901 r = MY_final_link_relocate (howto,
4902 input_bfd, input_section,
4903 contents, r_addr, relocation,
4907 if (r != bfd_reloc_ok)
4912 case bfd_reloc_outofrange:
4914 case bfd_reloc_overflow:
4919 name = strings + GET_WORD (input_bfd,
4920 syms[r_index].e_strx);
4925 s = aout_reloc_index_to_section (input_bfd, r_index);
4926 name = bfd_section_name (input_bfd, s);
4928 if (! ((*finfo->info->callbacks->reloc_overflow)
4929 (finfo->info, name, howto->name,
4930 (bfd_vma) 0, input_bfd, input_section, r_addr)))
4941 /* Relocate an a.out section using extended a.out relocs. */
4944 aout_link_input_section_ext (finfo, input_bfd, input_section, relocs,
4946 struct aout_final_link_info *finfo;
4948 asection *input_section;
4949 struct reloc_ext_external *relocs;
4950 bfd_size_type rel_size;
4953 boolean (*check_dynamic_reloc) PARAMS ((struct bfd_link_info *,
4955 struct aout_link_hash_entry *,
4956 PTR, bfd_byte *, boolean *,
4959 boolean relocateable;
4960 struct external_nlist *syms;
4962 struct aout_link_hash_entry **sym_hashes;
4964 bfd_size_type reloc_count;
4965 register struct reloc_ext_external *rel;
4966 struct reloc_ext_external *rel_end;
4968 output_bfd = finfo->output_bfd;
4969 check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
4971 BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_EXT_SIZE);
4972 BFD_ASSERT (input_bfd->xvec->header_byteorder
4973 == output_bfd->xvec->header_byteorder);
4975 relocateable = finfo->info->relocateable;
4976 syms = obj_aout_external_syms (input_bfd);
4977 strings = obj_aout_external_strings (input_bfd);
4978 sym_hashes = obj_aout_sym_hashes (input_bfd);
4979 symbol_map = finfo->symbol_map;
4981 reloc_count = rel_size / RELOC_EXT_SIZE;
4983 rel_end = rel + reloc_count;
4984 for (; rel < rel_end; rel++)
4989 unsigned int r_type;
4991 struct aout_link_hash_entry *h = NULL;
4992 asection *r_section = NULL;
4995 r_addr = GET_SWORD (input_bfd, rel->r_address);
4997 if (bfd_header_big_endian (input_bfd))
4999 r_index = ((rel->r_index[0] << 16)
5000 | (rel->r_index[1] << 8)
5002 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
5003 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
5004 >> RELOC_EXT_BITS_TYPE_SH_BIG);
5008 r_index = ((rel->r_index[2] << 16)
5009 | (rel->r_index[1] << 8)
5011 r_extern = (0 != (rel->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
5012 r_type = ((rel->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
5013 >> RELOC_EXT_BITS_TYPE_SH_LITTLE);
5016 r_addend = GET_SWORD (input_bfd, rel->r_addend);
5018 BFD_ASSERT (r_type < TABLE_SIZE (howto_table_ext));
5022 /* We are generating a relocateable output file, and must
5023 modify the reloc accordingly. */
5026 /* If we know the symbol this relocation is against,
5027 convert it into a relocation against a section. This
5028 is what the native linker does. */
5029 h = sym_hashes[r_index];
5030 if (h != (struct aout_link_hash_entry *) NULL
5031 && (h->root.type == bfd_link_hash_defined
5032 || h->root.type == bfd_link_hash_defweak))
5034 asection *output_section;
5036 /* Change the r_extern value. */
5037 if (bfd_header_big_endian (output_bfd))
5038 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_BIG;
5040 rel->r_type[0] &=~ RELOC_EXT_BITS_EXTERN_LITTLE;
5042 /* Compute a new r_index. */
5043 output_section = h->root.u.def.section->output_section;
5044 if (output_section == obj_textsec (output_bfd))
5046 else if (output_section == obj_datasec (output_bfd))
5048 else if (output_section == obj_bsssec (output_bfd))
5053 /* Add the symbol value and the section VMA to the
5055 relocation = (h->root.u.def.value
5056 + output_section->vma
5057 + h->root.u.def.section->output_offset);
5059 /* Now RELOCATION is the VMA of the final
5060 destination. If this is a PC relative reloc,
5061 then ADDEND is the negative of the source VMA.
5062 We want to set ADDEND to the difference between
5063 the destination VMA and the source VMA, which
5064 means we must adjust RELOCATION by the change in
5065 the source VMA. This is done below. */
5069 /* We must change r_index according to the symbol
5071 r_index = symbol_map[r_index];
5077 /* We decided to strip this symbol, but it
5078 turns out that we can't. Note that we
5079 lose the other and desc information here.
5080 I don't think that will ever matter for a
5086 if (! aout_link_write_other_symbol (h,
5096 name = strings + GET_WORD (input_bfd,
5097 syms[r_index].e_strx);
5098 if (! ((*finfo->info->callbacks->unattached_reloc)
5099 (finfo->info, name, input_bfd, input_section,
5108 /* If this is a PC relative reloc, then the addend
5109 is the negative of the source VMA. We must
5110 adjust it by the change in the source VMA. This
5114 /* Write out the new r_index value. */
5115 if (bfd_header_big_endian (output_bfd))
5117 rel->r_index[0] = r_index >> 16;
5118 rel->r_index[1] = r_index >> 8;
5119 rel->r_index[2] = r_index;
5123 rel->r_index[2] = r_index >> 16;
5124 rel->r_index[1] = r_index >> 8;
5125 rel->r_index[0] = r_index;
5130 /* This is a relocation against a section. We must
5131 adjust by the amount that the section moved. */
5132 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5133 relocation = (r_section->output_section->vma
5134 + r_section->output_offset
5137 /* If this is a PC relative reloc, then the addend is
5138 the difference in VMA between the destination and the
5139 source. We have just adjusted for the change in VMA
5140 of the destination, so we must also adjust by the
5141 change in VMA of the source. This is done below. */
5144 /* As described above, we must always adjust a PC relative
5145 reloc by the change in VMA of the source. */
5146 if (howto_table_ext[r_type].pc_relative)
5147 relocation -= (input_section->output_section->vma
5148 + input_section->output_offset
5149 - input_section->vma);
5151 /* Change the addend if necessary. */
5152 if (relocation != 0)
5153 PUT_WORD (output_bfd, r_addend + relocation, rel->r_addend);
5155 /* Change the address of the relocation. */
5156 PUT_WORD (output_bfd,
5157 r_addr + input_section->output_offset,
5163 bfd_reloc_status_type r;
5165 /* We are generating an executable, and must do a full
5170 h = sym_hashes[r_index];
5172 if (h != (struct aout_link_hash_entry *) NULL
5173 && (h->root.type == bfd_link_hash_defined
5174 || h->root.type == bfd_link_hash_defweak))
5176 relocation = (h->root.u.def.value
5177 + h->root.u.def.section->output_section->vma
5178 + h->root.u.def.section->output_offset);
5180 else if (h != (struct aout_link_hash_entry *) NULL
5181 && h->root.type == bfd_link_hash_undefweak)
5189 else if (r_type == RELOC_BASE10
5190 || r_type == RELOC_BASE13
5191 || r_type == RELOC_BASE22)
5193 struct external_nlist *sym;
5196 /* For base relative relocs, r_index is always an index
5197 into the symbol table, even if r_extern is 0. */
5198 sym = syms + r_index;
5199 type = bfd_h_get_8 (input_bfd, sym->e_type);
5200 if ((type & N_TYPE) == N_TEXT
5202 r_section = obj_textsec (input_bfd);
5203 else if ((type & N_TYPE) == N_DATA
5205 r_section = obj_datasec (input_bfd);
5206 else if ((type & N_TYPE) == N_BSS
5208 r_section = obj_bsssec (input_bfd);
5209 else if ((type & N_TYPE) == N_ABS
5211 r_section = bfd_abs_section_ptr;
5214 relocation = (r_section->output_section->vma
5215 + r_section->output_offset
5216 + (GET_WORD (input_bfd, sym->e_value)
5221 r_section = aout_reloc_index_to_section (input_bfd, r_index);
5223 /* If this is a PC relative reloc, then R_ADDEND is the
5224 difference between the two vmas, or
5225 old_dest_sec + old_dest_off - (old_src_sec + old_src_off)
5227 old_dest_sec == section->vma
5229 old_src_sec == input_section->vma
5231 old_src_off == r_addr
5233 _bfd_final_link_relocate expects RELOCATION +
5234 R_ADDEND to be the VMA of the destination minus
5235 r_addr (the minus r_addr is because this relocation
5236 is not pcrel_offset, which is a bit confusing and
5237 should, perhaps, be changed), or
5240 new_dest_sec == output_section->vma + output_offset
5241 We arrange for this to happen by setting RELOCATION to
5242 new_dest_sec + old_src_sec - old_dest_sec
5244 If this is not a PC relative reloc, then R_ADDEND is
5245 simply the VMA of the destination, so we set
5246 RELOCATION to the change in the destination VMA, or
5247 new_dest_sec - old_dest_sec
5249 relocation = (r_section->output_section->vma
5250 + r_section->output_offset
5252 if (howto_table_ext[r_type].pc_relative)
5253 relocation += input_section->vma;
5256 if (check_dynamic_reloc != NULL)
5260 if (! ((*check_dynamic_reloc)
5261 (finfo->info, input_bfd, input_section, h,
5262 (PTR) rel, contents, &skip, &relocation)))
5268 /* Now warn if a global symbol is undefined. We could not
5269 do this earlier, because check_dynamic_reloc might want
5270 to skip this reloc. */
5272 && ! finfo->info->shared
5273 && r_type != RELOC_BASE10
5274 && r_type != RELOC_BASE13
5275 && r_type != RELOC_BASE22)
5280 name = h->root.root.string;
5282 name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
5283 if (! ((*finfo->info->callbacks->undefined_symbol)
5284 (finfo->info, name, input_bfd, input_section, r_addr)))
5288 r = MY_final_link_relocate (howto_table_ext + r_type,
5289 input_bfd, input_section,
5290 contents, r_addr, relocation,
5292 if (r != bfd_reloc_ok)
5297 case bfd_reloc_outofrange:
5299 case bfd_reloc_overflow:
5304 || r_type == RELOC_BASE10
5305 || r_type == RELOC_BASE13
5306 || r_type == RELOC_BASE22)
5307 name = strings + GET_WORD (input_bfd,
5308 syms[r_index].e_strx);
5313 s = aout_reloc_index_to_section (input_bfd, r_index);
5314 name = bfd_section_name (input_bfd, s);
5316 if (! ((*finfo->info->callbacks->reloc_overflow)
5317 (finfo->info, name, howto_table_ext[r_type].name,
5318 r_addend, input_bfd, input_section, r_addr)))
5330 /* Handle a link order which is supposed to generate a reloc. */
5333 aout_link_reloc_link_order (finfo, o, p)
5334 struct aout_final_link_info *finfo;
5336 struct bfd_link_order *p;
5338 struct bfd_link_order_reloc *pr;
5341 reloc_howto_type *howto;
5342 file_ptr *reloff_ptr;
5343 struct reloc_std_external srel;
5344 struct reloc_ext_external erel;
5349 if (p->type == bfd_section_reloc_link_order)
5352 if (bfd_is_abs_section (pr->u.section))
5353 r_index = N_ABS | N_EXT;
5356 BFD_ASSERT (pr->u.section->owner == finfo->output_bfd);
5357 r_index = pr->u.section->target_index;
5362 struct aout_link_hash_entry *h;
5364 BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
5366 h = ((struct aout_link_hash_entry *)
5367 bfd_wrapped_link_hash_lookup (finfo->output_bfd, finfo->info,
5368 pr->u.name, false, false, true));
5369 if (h != (struct aout_link_hash_entry *) NULL
5374 /* We decided to strip this symbol, but it turns out that we
5375 can't. Note that we lose the other and desc information
5376 here. I don't think that will ever matter for a global
5380 if (! aout_link_write_other_symbol (h, (PTR) finfo))
5386 if (! ((*finfo->info->callbacks->unattached_reloc)
5387 (finfo->info, pr->u.name, (bfd *) NULL,
5388 (asection *) NULL, (bfd_vma) 0)))
5394 howto = bfd_reloc_type_lookup (finfo->output_bfd, pr->reloc);
5397 bfd_set_error (bfd_error_bad_value);
5401 if (o == obj_textsec (finfo->output_bfd))
5402 reloff_ptr = &finfo->treloff;
5403 else if (o == obj_datasec (finfo->output_bfd))
5404 reloff_ptr = &finfo->dreloff;
5408 if (obj_reloc_entry_size (finfo->output_bfd) == RELOC_STD_SIZE)
5411 MY_put_reloc(finfo->output_bfd, r_extern, r_index, p->offset, howto,
5421 r_pcrel = howto->pc_relative;
5422 r_baserel = (howto->type & 8) != 0;
5423 r_jmptable = (howto->type & 16) != 0;
5424 r_relative = (howto->type & 32) != 0;
5425 r_length = howto->size;
5427 PUT_WORD (finfo->output_bfd, p->offset, srel.r_address);
5428 if (bfd_header_big_endian (finfo->output_bfd))
5430 srel.r_index[0] = r_index >> 16;
5431 srel.r_index[1] = r_index >> 8;
5432 srel.r_index[2] = r_index;
5434 ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
5435 | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
5436 | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
5437 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
5438 | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
5439 | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
5443 srel.r_index[2] = r_index >> 16;
5444 srel.r_index[1] = r_index >> 8;
5445 srel.r_index[0] = r_index;
5447 ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
5448 | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
5449 | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
5450 | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
5451 | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
5452 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
5456 rel_ptr = (PTR) &srel;
5458 /* We have to write the addend into the object file, since
5459 standard a.out relocs are in place. It would be more
5460 reliable if we had the current contents of the file here,
5461 rather than assuming zeroes, but we can't read the file since
5462 it was opened using bfd_openw. */
5463 if (pr->addend != 0)
5466 bfd_reloc_status_type r;
5470 size = bfd_get_reloc_size (howto);
5471 buf = (bfd_byte *) bfd_zmalloc (size);
5472 if (buf == (bfd_byte *) NULL)
5474 r = MY_relocate_contents (howto, finfo->output_bfd,
5481 case bfd_reloc_outofrange:
5483 case bfd_reloc_overflow:
5484 if (! ((*finfo->info->callbacks->reloc_overflow)
5486 (p->type == bfd_section_reloc_link_order
5487 ? bfd_section_name (finfo->output_bfd,
5490 howto->name, pr->addend, (bfd *) NULL,
5491 (asection *) NULL, (bfd_vma) 0)))
5498 ok = bfd_set_section_contents (finfo->output_bfd, o,
5500 (file_ptr) p->offset,
5509 PUT_WORD (finfo->output_bfd, p->offset, erel.r_address);
5511 if (bfd_header_big_endian (finfo->output_bfd))
5513 erel.r_index[0] = r_index >> 16;
5514 erel.r_index[1] = r_index >> 8;
5515 erel.r_index[2] = r_index;
5517 ((r_extern ? RELOC_EXT_BITS_EXTERN_BIG : 0)
5518 | (howto->type << RELOC_EXT_BITS_TYPE_SH_BIG));
5522 erel.r_index[2] = r_index >> 16;
5523 erel.r_index[1] = r_index >> 8;
5524 erel.r_index[0] = r_index;
5526 (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
5527 | (howto->type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
5530 PUT_WORD (finfo->output_bfd, pr->addend, erel.r_addend);
5532 rel_ptr = (PTR) &erel;
5535 if (bfd_seek (finfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
5536 || (bfd_write (rel_ptr, (bfd_size_type) 1,
5537 obj_reloc_entry_size (finfo->output_bfd),
5539 != obj_reloc_entry_size (finfo->output_bfd)))
5542 *reloff_ptr += obj_reloc_entry_size (finfo->output_bfd);
5544 /* Assert that the relocs have not run into the symbols, and that n
5545 the text relocs have not run into the data relocs. */
5546 BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (finfo->output_bfd)
5547 && (reloff_ptr != &finfo->treloff
5549 <= obj_datasec (finfo->output_bfd)->rel_filepos)));